{"id":1131,"date":"2026-09-15T14:28:02","date_gmt":"2026-09-15T17:28:02","guid":{"rendered":"https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/?p=1131"},"modified":"2026-09-15T14:28:05","modified_gmt":"2026-09-15T17:28:05","slug":"leukemia","status":"publish","type":"post","link":"https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/2026\/09\/15\/leukemia\/","title":{"rendered":"Unraveling Acute Lymphoblastic Leukemia"},"content":{"rendered":"\n<p class=\"isSelectedEnd wp-block-paragraph\">At the Boldrini Research Center, in Campinas, the group led by Prof. Dr. Jos\u00e9 Andr\u00e9s Yunes is dedicated to investigating the biology of acute lymphoblastic leukemia (ALL), the most common childhood cancer. The researchers seek to answer a central question: why are some cancer cells able to resist treatment while others are destroyed?<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">For this report, we spoke with <strong>Prof. Dr. Jos\u00e9 Andr\u00e9s Yunes, as well as his students and researchers Ma. Manuella Munuera Rosati<\/strong>, <strong>Mikaela Teodoro<\/strong>, <strong>Ma. Gabriella de Oliveira Fortes<\/strong>, <strong>Maria Luiza Silva Pires<\/strong>, and <strong>Ma. Marina Buzatto Gilioli<\/strong>. We also spoke with <strong>Prof. Dr. Silvia Brandalise<\/strong>, a pediatrician and founder of the <strong>Boldrini Children\u2019s Center<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center has-vivid-cyan-blue-color has-text-color has-link-color has-large-font-size wp-elements-1\"><strong>The Search for New Answers to Childhood Leukemia<\/strong><\/h2>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">For nearly three decades, researcher <strong><a href=\"http:\/\/lattes.cnpq.br\/7572028567458424\" target=\"_blank\" rel=\"noopener\">Jos\u00e9 Andr\u00e9s Yunes<\/a><\/strong> has dedicated his scientific career to studying <strong>leukemias that affect children<\/strong>.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">Prof. Yunes holds a degree in Agronomic Engineering from the Federal University of Santa Catarina. He then completed a PhD in Genetics and Molecular Biology at the University of Campinas (Unicamp) in 1997. Yunes also completed postdoctoral research at Unicamp (1997) and at the Dana-Farber Cancer Institute, affiliated with Harvard Medical School, in the United States, between 2001 and 2003. He currently also serves as a collaborating professor at Unicamp, including our <a href=\"https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/farmacologia-da-unicamp\/\">Graduate Program in Pharmacology<\/a>.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">Shortly after completing his PhD, Prof. Yunes began his career as a researcher at the <a href=\"https:\/\/www.boldrini.org.br\/\" target=\"_blank\" rel=\"noopener\">Dr. Domingos A. Boldrini Children\u2019s Center for Hematological Research<\/a>, in Campinas. Today, Prof. Yunes works at the <a href=\"https:\/\/www.boldrini.org.br\/centro-de-pesquisa-boldrini\" target=\"_blank\" rel=\"noopener\">Boldrini Research Center<\/a>, one of the largest pediatric oncology research centers in Latin America.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">The Boldrini Research Center was inaugurated in 2018 to bring cutting-edge scientific research closer to the needs of pediatric oncology. It is one of the few Brazilian centers dedicated exclusively to research into childhood cancer.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\"><strong><a href=\"http:\/\/lattes.cnpq.br\/8596174740140376\" target=\"_blank\" rel=\"noopener\">Dr. Silvia Brandalise<\/a><\/strong>, <strong>founder of the Boldrini Children\u2019s Center<\/strong>, describes the creation of this facility: <em>\u201cWith the founding of the Boldrini Children\u2019s Center, research activities increased significantly, justifying the need to create the Boldrini Research Center.\u201d<\/em><\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">This is because the Boldrini Research Center supports the Boldrini Children\u2019s Center by performing laboratory analyses that help determine the best treatment for children with cancer.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">The structure of the Boldrini Research Center is impressive. I, Mia, have already visited several laboratories in Brazil and abroad. I can confidently say that I had never seen a facility as incredible as the Boldrini Research Center.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">Within this environment, the work of the <strong>Leukemia Biology Laboratory<\/strong>, coordinated by Prof. Yunes, is carried out. The Laboratory\u2019s projects can be said to revolve around one central question: why are some leukemia cells able to survive treatment while others are eliminated by chemotherapy?<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/wp-content\/uploads\/sites\/303\/2026\/09\/Copia-de-Final-blog-1024x576.jpg\" alt=\"boldrini yunes laborat\u00f3rio leucemia\" class=\"wp-image-1139\" srcset=\"https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/wp-content\/uploads\/sites\/303\/2026\/09\/Copia-de-Final-blog-980x551.jpg 980w, https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/wp-content\/uploads\/sites\/303\/2026\/09\/Copia-de-Final-blog-480x270.jpg 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1024px, 100vw\" \/><figcaption class=\"wp-element-caption\"><mark style=\"background-color:#ffffff\" class=\"has-inline-color has-cyan-bluish-gray-color\">Leukemia Biology Laboratory and Prof. Jos\u00e9 Andr\u00e9s Yunes.<\/mark><\/figcaption><\/figure>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">To answer this question, different laboratory projects focus on distinct issues: <strong>minimal residual disease<\/strong> (leukemic cells that remain in the body after treatment), <strong>chemotherapy resistance<\/strong>, <strong>the discovery of new therapeutic targets<\/strong>, and <strong>the interaction between leukemic cells and the bone marrow microenvironment<\/strong>.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">In this article, we will discuss six different projects conducted by Prof. Yunes\u2019s group. But first, we need to understand a little more about acute lymphoblastic leukemia.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center has-vivid-cyan-blue-color has-text-color has-link-color has-large-font-size wp-elements-2\"><strong>What Is Acute Lymphoblastic Leukemia?<\/strong><\/h2>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">To understand what happens in <strong><mark style=\"background-color:#8ed1fc\" class=\"has-inline-color has-black-color\">acute lymphoblastic leukemia (ALL)<\/mark><\/strong>, we first need to understand how blood normally works. Blood is made up of different types of cells, each with specific functions.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\"><strong>Red blood cells<\/strong>, for example, are responsible for transporting oxygen throughout the body. <strong>Platelets<\/strong> participate in blood clotting, helping to control bleeding. <strong>White blood cells<\/strong> play a role in defending the body against infections.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">Among the different types of white blood cells are <strong><mark style=\"background-color:#8ed1fc\" class=\"has-inline-color has-black-color\">lymphocytes<\/mark><\/strong>. These cells are essential for what is known as adaptive immunity, a process in which our body recognizes a threat specifically and \u201cremembers\u201d it, allowing for a faster and more efficient response upon subsequent exposure.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">For example, when a person is vaccinated against a viral disease, the body begins to produce memory cells against the virus that causes that disease. Thus, if the person comes into contact with that virus in the future, the memory cells will be able to recognize it and organize a rapid defense response.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">As mentioned above, lymphocytes are essential for this type of immunity. There are different types of lymphocytes, including <strong><mark style=\"background-color:#8ed1fc\" class=\"has-inline-color has-black-color\">B lymphocytes and T lymphocytes<\/mark><\/strong>, which have different functions.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\"><strong>B lymphocytes<\/strong> can produce antibodies used to specifically identify microorganisms. <strong>T lymphocytes<\/strong>, in turn, help coordinate the body\u2019s defense against the microorganism identified by the antibodies.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">Both T and B lymphocytes have the same origin: the so-called <strong><mark style=\"background-color:#8ed1fc\" class=\"has-inline-color has-black-color\">progenitor cells in the bone marrow<\/mark><\/strong>. As these progenitor cells develop, they can follow different pathways, eventually becoming T or B lymphocytes.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">This is precisely where the story of <strong>acute lymphoblastic leukemia (ALL)<\/strong> begins. The disease gets its name because it involves the progenitor cells that give rise to lymphocytes (hence, \u201c<strong>lymphoblastic leukemia<\/strong>\u201d) and features rapid proliferation of immature cells (hence, \u201c<strong>acute<\/strong>\u201d).<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/wp-content\/uploads\/sites\/303\/2026\/09\/64-1024x576.jpg\" alt=\"leukemia\" class=\"wp-image-1141\" srcset=\"https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/wp-content\/uploads\/sites\/303\/2026\/09\/64-980x551.jpg 980w, https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/wp-content\/uploads\/sites\/303\/2026\/09\/64-480x270.jpg 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1024px, 100vw\" \/><figcaption class=\"wp-element-caption\"><mark style=\"background-color:#ffffff\" class=\"has-inline-color has-cyan-bluish-gray-color\">A bone marrow aspirate smear from a patient with precursor B-cell acute lymphoblastic leukemia (source: Wikimedia Commons, VashiDonsk).<\/mark><\/figcaption><\/figure>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">Genetic changes in progenitor cells can cause them to lose their normal mechanisms for controlling cell division. As a result, the cells begin to proliferate uncontrollably.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">Prof. Yunes explains: <em>\u201cThis cell undergoes a genetic mutation and begins proliferating uncontrollably, taking the place of other normal cells.\u201d<\/em><\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">The problem is that the bone marrow functions as a kind of \u201cblood factory.\u201d It is where the cells that circulate throughout the body are continuously produced. When leukemic cells multiply excessively, they begin to occupy the space and resources that would otherwise be used by normal cells.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">As a result, <strong>the production of healthy blood cells is impaired<\/strong>. A reduction in red blood cells can lead to anemia; a decrease in platelets increases the risk of bleeding; and reduced production of white blood cells can make children more vulnerable to infections.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center has-vivid-cyan-blue-color has-text-color has-link-color has-large-font-size wp-elements-3\"><strong>The Mystery of Relapses<\/strong><\/h2>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">Until the 1960s, a diagnosis of pediatric ALL was practically considered a death sentence. There were no effective treatments.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">With the introduction of <strong><mark style=\"background-color:#8ed1fc\" class=\"has-inline-color has-black-color\">chemotherapy<\/mark><\/strong>, doctors observed a major improvement in the treatment of ALL. Initially, chemotherapy involved only one drug. <strong>The disease entered remission (it was controlled), but soon returned.<\/strong><\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">The great revolution came with the introduction of <strong>combination chemotherapy<\/strong> (polychemotherapy), combining multiple chemotherapy drugs with different mechanisms of action.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">During the first weeks of treatment, around four to five drugs are used together to aggressively fight the disease. Doctors realized that treatment had to be administered at the <strong>limit of toxicity<\/strong>. \u201c<em>When the child entered treatment, we couldn\u2019t keep giving them breaks<\/em>,\u201d explains Prof. Yunes.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">Once doctors had improved chemotherapy to increase patient survival after the initial phase, a new challenge emerged. <strong>The cancer returned in the brains and spinal cords of many children.<\/strong><\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">Researchers discovered that this happened because the central nervous system functioned as a \u201csanctuary\u201d for leukemia. This is because it has the so-called <strong><mark style=\"background-color:#8ed1fc\" class=\"has-inline-color\">blood-brain barrier<\/mark><\/strong>, a structure that prevents toxins, as well as several chemotherapy drugs, from entering.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">In other words, leukemic cells were able to \u201chide\u201d from chemotherapy in these regions, allowing them to proliferate. To overcome this, treatment began to include central nervous system prophylaxis, in which medication is administered directly into the <strong>cerebrospinal fluid<\/strong>, the fluid that surrounds and protects the brain and spinal cord.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">In this way, the medication can reach the central nervous system directly, bypassing filtration by the blood-brain barrier. Thus, leukemic cells hiding in this region can also become targets of chemotherapy.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">With the combination of these strategies, <strong>survival rates<\/strong> among patients with ALL have improved. At reference centers such as the Boldrini Children\u2019s Center, the cure rate for pediatric ALL exceeds 80% of cases.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/wp-content\/uploads\/sites\/303\/2026\/09\/65-1024x576.jpg\" alt=\"boldrini\n\" class=\"wp-image-1142\" srcset=\"https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/wp-content\/uploads\/sites\/303\/2026\/09\/65-980x551.jpg 980w, https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/wp-content\/uploads\/sites\/303\/2026\/09\/65-480x270.jpg 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1024px, 100vw\" \/><figcaption class=\"wp-element-caption\"><mark style=\"background-color:#ffffff\" class=\"has-inline-color has-cyan-bluish-gray-color\">Boldrini Research Center (source: Boldrini Center).<\/mark><\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center has-vivid-cyan-blue-color has-text-color has-link-color has-large-font-size wp-elements-4\"><strong>What Challenges Remain?<\/strong><\/h2>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">Despite this impressive historic progress, the problem is far from solved. <strong><mark style=\"background-color:#8ed1fc\" class=\"has-inline-color has-black-color\">Relapses<\/mark> are still the main challenge<\/strong>. When the disease returns, it means that some leukemic cells managed to escape the effects of the drugs. But how is this possible?<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">Studies show that some leukemic cells enter a state of <strong>\u201cdormancy\u201d (quiescence)<\/strong>, temporarily stopping their division. Since many chemotherapy drugs specifically attack cells that are actively dividing, these dormant cells can \u201cgo unnoticed.\u201d<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">These cells remain in the body as <strong>minimal residual disease<\/strong> and, when treatment ends, begin to multiply again, causing <strong>relapse<\/strong>.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">The question is: <strong>what is different about these cells that enter a state of \u201cdormancy\u201d compared with other leukemic cells?<\/strong><\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">You might imagine that these cells acquired mutations that made them stronger. But the truth is that studies show that <strong>these cells are genetically identical<\/strong>.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">DNA functions like a large recipe book that provides instructions for producing all the proteins a cell needs to perform its functions. But two cells can have exactly the same DNA while \u201creading\u201d completely different pages of this book.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">This means that genetically identical cells can adopt what we call distinct <strong>transcriptional states<\/strong>. This results in differences in cell behavior, making some cells slower or dormant.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">For this reason, master\u2019s student <strong><a href=\"\/\/lattes.cnpq.br\/4299654958859427\">Manuella Munuera Rosati<\/a><\/strong> investigates what is known as <strong><mark style=\"background-color:#8ed1fc\" class=\"has-inline-color has-black-color\">transcriptional memory<\/mark><\/strong>.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">Transcriptional memory is the mechanism by which a cell, after being exposed to a stimulus, learns how to respond to that stimulus. In other words, it creates a memory.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">According to Manuella, this mechanism may be involved in changes in the transcriptional states of leukemic cells. In this way, they may \u201clearn\u201d how to respond to chemotherapy.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\"><em>&#8220;In many cases, this response occurs more rapidly or intensely (&#8230;), allowing the cell to respond more efficiently to a new exposure to stress, contributing to its adaptation and, in some contexts, to its survival.\u201d<\/em>, explains Manuella.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">Manuella\u2019s project seeks to unravel how this transcriptional memory is formed.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">In the study, researchers assess how ALL cells that survived chemotherapy respond to <strong>61 different anticancer drugs<\/strong>. This will allow them to evaluate how these cells acquired <strong>drug resistance<\/strong>.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">In addition, the cells\u2019 transcriptional states will be assessed before and after exposure to chemotherapy drugs. This will also make it possible to determine whether acquired drug resistance is associated with the formation of transcriptional memory.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">Unraveling these mechanisms could pave the way for future drugs that target leukemia before it even learns how to defend itself.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center has-vivid-cyan-blue-color has-text-color has-link-color has-large-font-size wp-elements-5\"><strong>The \u201cLittle Molecular Robot\u201d That Counts Cell Divisions<\/strong><\/h2>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">Among all the pathways investigated by Prof. Yunes\u2019s group, one in particular seems to have come straight out of a science fiction book. The project led by PhD student <strong><a href=\"http:\/\/lattes.cnpq.br\/2215301953407286\" target=\"_blank\" rel=\"noopener\">Mikaela Teodoro<\/a><\/strong> seeks to develop a way to count, cell by cell, how many times a cell has divided since the beginning of its journey.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">But why is this so important? Knowing how many times a leukemic cell has divided helps identify where it proliferated rapidly and, more importantly, where it preferred to remain dormant and escape chemotherapy.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">To make this possible, the team uses <strong><mark style=\"background-color:#8ed1fc\" class=\"has-inline-color has-black-color\">Prime Editing<\/mark><\/strong> technology. This is an advanced gene-editing technique that works with extreme precision, like an editor of the \u201ctext\u201d of DNA. <strong>The system will be configured to make small edits to the cell\u2019s DNA each time it divides.<\/strong><\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">Prof. Yunes summarizes the concept with a metaphor: <em>\u201cIt\u2019s like a little molecular robot that you implant into the cell, and it keeps track of how many times that cell has divided. This way, you can find out where the cell becomes dormant and whether this is related to resistance to therapy.\u201d<\/em><\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">Therefore, <strong>the researchers intend to directly investigate the relationship between the number of cell divisions and the ability of cells to resist chemotherapy treatments.<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/wp-content\/uploads\/sites\/303\/2026\/09\/67-1024x576.jpg\" alt=\"\" class=\"wp-image-1145\" srcset=\"https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/wp-content\/uploads\/sites\/303\/2026\/09\/67-980x551.jpg 980w, https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/wp-content\/uploads\/sites\/303\/2026\/09\/67-480x270.jpg 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1024px, 100vw\" \/><figcaption class=\"wp-element-caption\"><mark style=\"background-color:#ffffff\" class=\"has-inline-color has-cyan-bluish-gray-color\">Representation of \u201cdormant\u201d leukemia cells in the brain, allowing them to evade chemotherapy drugs.<\/mark><\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center has-vivid-cyan-blue-color has-text-color has-link-color has-large-font-size wp-elements-6\"><strong>One Leukemia, Two Subtypes<\/strong><\/h2>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">To an outside observer, ALL may appear to be a single disease. However, it is extremely diverse. Starting with the origin of the affected cells: <strong>the disease is divided into B-cell ALL (which accounts for approximately 85% of childhood cases) and T-cell ALL (approximately 15%).<\/strong><\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\"><strong>Although less common, T-cell ALL is more aggressive<\/strong>. In addition, differences in cellular origin mean that a treatment effective against B-cell ALL will not necessarily work against T-cell ALL, particularly when conventional chemotherapy fails.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">This is the field of research pursued by PhD student <strong><a href=\"http:\/\/lattes.cnpq.br\/9151876214678276\" target=\"_blank\" rel=\"noopener\">Ma. Gabriella de Oliveira Fortes<\/a><\/strong>. She summarizes the objective behind her research:<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\"><em>&#8220;B and T cells have different transcriptional profiles and tools for surviving treatment. Since conventional drugs are already being used at their maximum tolerated doses, the search for specific targets and new treatment strategies is essential for patients who do not respond to traditional chemotherapy.&#8221;<\/em><\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">The research maps the molecular characteristics of T-cell ALL samples and cross-references these data with the cells\u2019 responses to 61 anticancer drugs. <strong>The goal is to identify molecular markers (genetic characteristics) that indicate which patients are more likely to respond to specific drugs.<\/strong><\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">This approach opens the door to precision medicine in pediatric oncology: instead of applying a generic treatment to everyone, prior molecular characterization makes it possible to identify specific vulnerabilities in each cancer.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center has-vivid-cyan-blue-color has-text-color has-link-color has-large-font-size wp-elements-7\"><strong>Representing the Diversity of Leukemia<\/strong><\/h2>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">In addition to the main division between B-cell ALL and T-cell ALL, there are dozens of molecular subtypes with their <strong>specific genetic alterations<\/strong>, which determine how aggressive the cancer will be and how it will respond to treatment.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">This great variety creates a bottleneck for science. <strong>Researchers depend on the cell lines available to them.<\/strong> In other words, in their experiments, they can use populations of leukemic cells maintained alive in the laboratory.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\"><strong>The problem is that the cell lines currently available worldwide are limited and do not encompass all known molecular subtypes of ALL.<\/strong><\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">That is why undergraduate research student <strong><a href=\"http:\/\/lattes.cnpq.br\/5288631416129361\" target=\"_blank\" rel=\"noopener\">Maria Luiza Silva Pires<\/a><\/strong> seeks to help fill these gaps through her project.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">The study uses samples from the institutional biobank of the <strong>Boldrini Children\u2019s Center<\/strong> and attempts to grow them in cell culture. This is far from a simple task. Many of these cells do not multiply in the laboratory. This is a major contradiction, since one of the main characteristics of cancer is uncontrolled growth.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">Prof. Yunes comments: <em>\u201cIt is surprising how a cell that proliferates so much in a patient does not thrive and dies when you put it in culture.\u201d<\/em><\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">As Yunes explains, in the human body, leukemic cells receive constant support from the bone marrow microenvironment. When removed from this \u201cnest\u201d and placed on a plastic plate, most cannot withstand the stress or the absence of the appropriate growth factors.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">Establishing new cell lines that can survive in the laboratory without having to be genetically modified would open valuable avenues for research. It would allow researchers to investigate therapeutic approaches that are much more closely aligned with each patient\u2019s reality.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center has-vivid-cyan-blue-color has-text-color has-link-color has-large-font-size wp-elements-8\"><strong>The Environment Also Matters<\/strong><\/h2>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">Speaking of the \u201cnest\u201d of leukemic cells, let\u2019s discuss the importance of the <strong><mark style=\"background-color:#8ed1fc\" class=\"has-inline-color has-black-color\">bone marrow<\/mark><\/strong>. It is a true <strong>\u201cblood factory.\u201d<\/strong> The bone marrow microenvironment provides chemical signals, nutrients, and physical support for cell maturation.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">In leukemia, the tumor takes advantage of this environment, occupying space and depleting resources that should support the production of healthy blood cells.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/wp-content\/uploads\/sites\/303\/2026\/09\/66-1024x576.jpg\" alt=\"\" class=\"wp-image-1144\" srcset=\"https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/wp-content\/uploads\/sites\/303\/2026\/09\/66-980x551.jpg 980w, https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/wp-content\/uploads\/sites\/303\/2026\/09\/66-480x270.jpg 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1024px, 100vw\" \/><figcaption class=\"wp-element-caption\"><mark style=\"background-color:#ffffff\" class=\"has-inline-color has-cyan-bluish-gray-color\">Representation of acute lymphoblastic leukemia cells occupying the space of healthy cells in the bone marrow.<\/mark><\/figcaption><\/figure>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">Chemotherapy is effective at destroying diseased cells, but it also indiscriminately affects healthy tissues in the bone marrow. As mentioned earlier, chemotherapy attacks cells that divide rapidly. This also occurs in the bone marrow, which continuously produces new blood cells.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">This raises a question: <strong>would it be possible to selectively stimulate the recovery of our healthy cells lost during chemotherapy so that they could help defeat the disease?<\/strong><\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">After all, clinical observations and studies conducted by the group itself suggest that patients who are able to restore their population of healthy lymphocytes respond much better to treatment.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">The answer to this question may lie in <strong><mark style=\"background-color:#8ed1fc\" class=\"has-inline-color has-black-color\">interleukin-7 (IL-7)<\/mark><\/strong>, a molecule essential for lymphopoiesis, that is, the formation and development of new healthy lymphocytes. This is the basis of the project conducted by master\u2019s student <strong><a href=\"http:\/\/lattes.cnpq.br\/2448523507165503\" target=\"_blank\" rel=\"noopener\">Victoria Albeck<\/a><\/strong>.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">Prof. Yunes explains: <em>\u201cIf we stimulate the cells with the cytokine IL-7, we can strengthen the healthy cells and see whether they can gain space and displace the leukemia.\u201d<\/em><\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">To make these laboratory tests possible, the team faced a practical obstacle: <strong>purchasing commercial IL-7 for animal experiments is extremely expensive<\/strong>. In collaboration with other Unicamp researchers (Dr. Italo E. P. da Silva and Dr. Katlin Massirer), <strong>the group produced IL-7 using insect cells as a biological factory<\/strong>.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">In addition, <strong>they developed a mutant version of the molecule<\/strong>. The genetic modification made it possible to <strong>extend the time IL-7 remains in the body<\/strong>.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">However, Prof. Yunes is careful to remain realistic when discussing the potential application of IL-7 in patients. The project is still in its early stages, before moving on to animal trials. There is a long experimental and regulatory path ahead before any potential clinical study involving humans.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center has-vivid-cyan-blue-color has-text-color has-link-color has-large-font-size wp-elements-9\"><strong>It Is Not Enough to Fight Leukemia; We Must Also Protect the Body<\/strong><\/h2>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">The search for a cure for childhood leukemia involves a delicate balance. <strong>Chemotherapy drugs work by attacking rapidly dividing cells<\/strong>. This characteristic is ideal for fighting cancer, but it also <strong>severely affects healthy tissues in the body that have a high rate of renewal, such as the lining of the gastrointestinal tract<\/strong>.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">As a result, one of the most painful and debilitating side effects of treatment is <strong><mark style=\"background-color:#8ed1fc\" class=\"has-inline-color has-black-color\">intestinal mucositis<\/mark><\/strong>. Injury and inflammation of the mucosa lining the intestine cause severe pain, frequent diarrhea, and seriously impair nutrient absorption.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">In addition, disruption of the intestinal barrier turns the organ into a gateway for bacteria and serious infections. The situation becomes even more dangerous when we remember that ALL patients have weakened immunity because of the disease and its treatment.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">In severe cases, gastrointestinal complications force chemotherapy to be temporarily interrupted, reducing the effectiveness of cancer treatment.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">This raises a crucial question for science: <strong>how can leukemia treatment be made more tolerable and safer without reducing its effectiveness against the tumor?<\/strong><\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">To address this challenge, PhD student <strong><a href=\"http:\/\/lattes.cnpq.br\/9544019210564235\" target=\"_blank\" rel=\"noopener\">Ma. Marina Buzatto Gilioli<\/a><\/strong> is investigating the use of <strong>bioactive peptides<\/strong> as a complementary therapy. <strong>Bioactive peptides<\/strong> are small fragments of proteins that have <strong>immunomodulatory, anti-inflammatory, and tissue-protective properties<\/strong>.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">Researcher Marina summarizes the project: <em>&#8220;I investigate whether these peptides can protect the intestinal mucosa during chemotherapy, helping the intestine maintain its integrity and recover more quickly from the damage caused by treatment.&#8221;<\/em><\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">In the experiments, <strong>mice receive chemotherapy together with oral supplementation with bioactive peptides or without it<\/strong>. The group carefully evaluates the health of the intestinal mucosa, determining the effectiveness of peptide supplementation.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">Prof. Yunes highlights the appeal of this line of research: <em>&#8220;It is not that it will directly fight leukemia, but it improves the patient\u2019s quality of life during treatment and reduces infections. It is a promising and practical approach that could, in the future, provide a basis for clinical studies aimed at preventing mucositis in children undergoing treatment.&#8221;<\/em><\/p>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center has-vivid-cyan-blue-color has-text-color has-link-color has-large-font-size wp-elements-10\"><strong>What Connects All These Projects?<\/strong><\/h2>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">At first glance, the research paths pursued by Prof. Yunes\u2019s group may seem diverse. And they really are. But ultimately, all these lines of research converge toward the same fundamental goal: <strong>to unravel the biology of acute lymphoblastic leukemia in order to make treatments more precise, effective, and safe<\/strong>.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">All of these studies are at different stages of what is known as <strong><mark style=\"background-color:#8ed1fc\" class=\"has-inline-color has-black-color\">preclinical research<\/mark><\/strong>. The advancement of medical science follows a long and rigorous journey, with many scientific and regulatory steps before a treatment becomes available. Rigorous testing of efficacy, toxicity, and safety in clinical trials involving patients is required.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">It is essential to understand the barriers and requirements at each stage. A promising result observed in cell cultures does not guarantee that the same response will occur in a patient.<\/p>\n\n\n\n<p class=\"isSelectedEnd wp-block-paragraph\">This demonstrates that the scientific research conducted by Prof. Andr\u00e9s Yunes\u2019s group is not simply searching for \u201ca miraculous new drug\u201d for childhood cancer. The work seeks to build a solid body of knowledge by developing a deep understanding of the biology of the disease.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"isSelectedEnd has-white-color has-black-background-color has-text-color has-background has-link-color wp-elements-11 wp-block-paragraph\">The project featured in this article is funded by FAPESP (grant numbers 24\/22071-1, 25\/12220-2, 24\/03383-2, 24\/03384-9, 26\/01815-8, 25\/17530-0, and 25\/03857-7) and by the PRONON program (NUP 25000.211174.2019-45) of the Brazilian Ministry of Health.<\/p>\n\n\n\n<p class=\"has-black-color has-light-green-cyan-background-color has-text-color has-background has-link-color wp-elements-12 wp-block-paragraph\">This article was produced with support from the S\u00e3o Paulo Research Foundation (FAPESP), Brazil. Grant No. 25\/17158-3. The opinions, hypotheses, conclusions, or recommendations expressed in this material are the sole responsibility of the author(s) and do not necessarily reflect the views of FAPESP.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h2 class=\"wp-block-heading has-large-font-size\">Further Reading:<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/21593192\/\" target=\"_blank\" rel=\"noopener\">IL-7 and ALL<\/a> (doi: 10.1158\/0008-5472.CAN-10-3606)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/34907175\" target=\"_blank\" rel=\"noopener\">IL-7 receptor mutation and ALL (article 1)<\/a> (doi: 10.1038\/s41467-021-27197-5)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/21892159\/\" target=\"_blank\" rel=\"noopener\">IL-7 receptor mutation and ALL (article 2)<\/a> (doi: 110.1038\/ng.924)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/41939480\/\" target=\"_blank\" rel=\"noopener\">Drug screening for ALL<\/a> (doi: 10.3389\/fonc.2026.1685447)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/41183006\/\" target=\"_blank\" rel=\"noopener\">Mouse model of ALL relapse<\/a> (doi: 10.3791\/68797)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"has-large-font-size wp-block-paragraph\"><strong><mark style=\"background-color:#ffffff\" class=\"has-inline-color has-vivid-green-cyan-color\">Written by:<\/mark><\/strong><\/p>\n\n\n<div class=\"wp-block-image eplus-wrapper\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/wp-content\/uploads\/sites\/303\/2026\/02\/Design-sem-nome-3-1024x1024.png\" alt=\"\" class=\"wp-image-258\" style=\"width:150px;height:auto\" srcset=\"https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/wp-content\/uploads\/sites\/303\/2026\/02\/Design-sem-nome-3-980x980.png 980w, https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/wp-content\/uploads\/sites\/303\/2026\/02\/Design-sem-nome-3-480x480.png 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1024px, 100vw\" \/><\/figure>\n<\/div>\n\n\n<p class=\"has-text-align-center eplus-wrapper wp-block-paragraph\"><strong><mark style=\"background-color:#ffffff\" class=\"has-inline-color has-vivid-green-cyan-color\">Mia Schezaro Ramos<\/mark><\/strong><br><mark style=\"background-color:#ffffff\" class=\"has-inline-color has-vivid-green-cyan-color\">Pharmacist. Ph.D. in Pharmacology. Science journalist, illustrator, trans, Nintendo enthusiast, K-pop fan, and dependent on<\/mark> <mark style=\"background-color:#ffffff\" class=\"has-inline-color has-vivid-green-cyan-color\">physical exercise to stay sane.<\/mark><\/p>\n\n\n\n<p class=\"has-text-align-center eplus-wrapper wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Discover how researchers at the Boldrini Research Center investigate acute lymphoblastic leukemia (ALL), chemotherapy resistance, relapse, and new strategies for more precise and safer treatments for childhood leukemia.<\/p>\n","protected":false},"author":776,"featured_media":1140,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","_eb_attr":"","_monsterinsights_skip_tracking":false,"pgc_sgb_lightbox_settings":"","_vp_format_video_url":"","_vp_image_focal_point":[],"footnotes":""},"categories":[18,29,30],"tags":[332,330,341,339,340,344,333,345,331,346,326,338,335,336,343,337,329,334,342],"class_list":["post-1131","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-english","category-farmaco-explains","category-research","tag-acute-leukemia","tag-acute-lymphoblastic-leukemia","tag-b-cell-leukemia","tag-boldrini-research-center","tag-bone-marrow","tag-cancer","tag-chemotherapy-resistance","tag-childhood-cancer","tag-childhood-leukemia","tag-drug-response","tag-il-7","tag-leukemia","tag-minimal-residual-disease","tag-molecular-subtypes","tag-mucositis","tag-precision-medicine","tag-prime-editing","tag-relapse","tag-t-cell-leukemia"],"jetpack_featured_media_url":"https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/wp-content\/uploads\/sites\/303\/2026\/09\/63.jpg","_links":{"self":[{"href":"https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/wp-json\/wp\/v2\/posts\/1131","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/wp-json\/wp\/v2\/users\/776"}],"replies":[{"embeddable":true,"href":"https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/wp-json\/wp\/v2\/comments?post=1131"}],"version-history":[{"count":6,"href":"https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/wp-json\/wp\/v2\/posts\/1131\/revisions"}],"predecessor-version":[{"id":1169,"href":"https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/wp-json\/wp\/v2\/posts\/1131\/revisions\/1169"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/wp-json\/wp\/v2\/media\/1140"}],"wp:attachment":[{"href":"https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/wp-json\/wp\/v2\/media?parent=1131"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/wp-json\/wp\/v2\/categories?post=1131"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.blogs.unicamp.br\/farmacoemfoco\/wp-json\/wp\/v2\/tags?post=1131"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}