Immunobiology

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Salk Institute for Biological Studies - Immunobiology - News

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Your immune cells are what they eat

LA JOLLA—The decision between scrambled eggs or an apple for breakfast probably won’t make or break your day. However, for your cells, a decision between similar microscopic nutrients could determine their entire identity. If and how nutrient preference impacts cell identity has been a longstanding mystery for scientists—until a team of Salk Institute immunologists revealed a novel framework for the complicated relationship between nutrition and cell identity.


Salk awarded $3.6 million by the California Institute for Regenerative Medicine to advance research on brain aging

LA JOLLA—The Salk Institute was awarded $3.6 million by the California Institute for Regenerative Medicine (CIRM), one of the world’s largest institutions dedicated to regenerative medicine. Salk Professor Rusty Gage will lead the new CIRM-funded Shared Resources Laboratory focused on stem cell-based models of aging and neurodegeneration.


Salk Professor Janelle Ayres named Howard Hughes Medical Institute Investigator

LA JOLLA—Salk Professor Janelle Ayres has been selected as a 2024 Howard Hughes Medical Institute (HHMI) Investigator. The HHMI Investigators program awards established scientists with approximately $9 million in funding over seven years to pursue boundary-breaking research in their field. The honor recognizes her influential work in immunology and microbiology and its applications to the global crisis of antibiotic resistance.


Cooperative proteins help the immune system identify and attack invaders

LA JOLLA—Bacteria, parasites, viruses—the immune system tackles them all. At the front line of the human immune response are cells called macrophages, which are responsible for correctly identifying intruders and then directing how the entire immune system responds. Researchers at the Salk Institute have now discovered a molecular mechanism that helps macrophages mount a coordinated response tailored to a specific immune challenge.


This time, it’s personal: Enhancing patient response to cancer immunotherapy

LA JOLLA—Immunotherapy has revolutionized the way we treat cancer in recent years. Instead of targeting the tumor itself, immunotherapies work by directing patients’ immune systems to attack their tumors more effectively. This has been especially impactful in improving outcomes for certain difficult-to-treat cancers. Still, fewer than half of all cancer patients respond to current immunotherapies, creating an urgent need to identify biomarkers that can predict which patients are most likely to benefit.


Salk Professor Janelle Ayres elected to American Academy of Microbiology

LA JOLLA—Salk Institute Professor Janelle Ayres has been elected to the American Academy of Microbiology’s Fellowship Class of 2024. Fellows of the Academy, an honorific leadership group within the American Society for Microbiology, are elected annually through a highly selective, peer-review process based on their records of scientific achievement and original contributions that have advanced microbiology. The Academy received 156 nominations this year, electing 65 into the 2024 Fellowship Class.


Faulty DNA disposal system causes inflammation

LA JOLLA—Cells in the human body contain power-generating mitochondria, each with their own mtDNA—a unique set of genetic instructions entirely separate from the cell’s nuclear DNA that mitochondria use to create life-giving energy. When mtDNA remains where it belongs (inside of mitochondria), it sustains both mitochondrial and cellular health—but when it goes where it doesn’t belong, it can initiate an immune response that promotes inflammation.


Lung cancer hijacks immune cell metabolism to fuel its own growth

LA JOLLA—Lung adenocarcinoma is the most common lung cancer and the cause of most cancer-related deaths in the United States. There are several ways lung adenocarcinoma can arise, one of which is a mutation in a protein called EGFR (epidermal growth factor receptor). Non-mutated EGFR helps cells grow in response to injury, but mutated EGFR promotes out-of-control growth that can turn into cancer. Modern immunotherapies don’t work against EGFR-driven lung adenocarcinoma, and while some drugs exist to treat the cancer, patients typically develop a resistance to them within just a few years. This gap in the treatment toolchest inspired Salk Institute researchers to probe for weak spots in the cancer’s growth pathway.


Genetic architecture may be key to using peacekeeping immune cells to treat autoimmunity or fight cancer

LA JOLLA—Regulatory T cells are specialized immune cells that suppress the immune response and prevent the body from attacking its own cells. Understanding how these cells work is key to determining how they might be manipulated to encourage the destruction of cancer cells or prevent autoimmunity. Cell behavior is influenced by chromatin architecture (the 3D shape of chromosomes) and which genes are accessible to proteins—like Foxp3, which promotes regulatory T cell development.


Rewiring tumor mitochondria enhances the immune system’s ability to recognize and fight cancer

LA JOLLA—Immunotherapy, which uses the body’s own immune system to fight cancer, is an effective treatment option, yet many patients do not respond to it. Thus, cancer researchers are seeking new ways to optimize immunotherapy so that it is more effective for more people. Now, Salk Institute scientists have found that manipulating an early step in energy production in mitochondria—the cell’s powerhouses—reduces melanoma tumor growth and enhances the immune response in mice.


Reducing stress on T cells makes them better cancer fighters

LA JOLLA—Even for killer T cells—specialized immune cells—seeking and destroying cancer cells around the clock can be exhausting. If scientists can understand why killer T cells become exhausted, then they can create more resilient cancer-killing cells.


Using the body’s “invisible scalpel” to remove brain cancer

LA JOLLA—Glioblastoma, the most common and deadly form of brain cancer, grows rapidly to invade and destroy healthy brain tissue. The tumor sends out cancerous tendrils into the brain that make surgical tumor removal extremely difficult or impossible.


Why we lose fat and muscle during infection

LA JOLLA—Although infections can present with many different symptoms, one common symptom is the loss of fat and muscle, a process called wasting. Salk scientists wanted to know whether wasting was beneficial in fighting infections.


Revealing HIV drug-resistance mechanisms through protein structures

LA JOLLA—Salk Institute researchers, in collaboration with the National Institutes of Health, have discovered the molecular mechanisms by which the human immunodeficiency virus (HIV) becomes resistant to Dolutegravir, one of the most effective, clinically used antiviral drugs for treating HIV.


All the immunity, none of the symptoms

LA JOLLA—Worldwide, more than a million deaths occur each year due to diarrheal diseases that lead to dehydration and malnutrition. Yet, no vaccine exists to fight or prevent these diseases, which are caused by bacteria like certain strains of E. coli. Instead, people with bacterial infections must rely on the body taking one of two defense strategies: kill the intruders or impair the intruders but keep them around. If the body chooses to impair the bacteria, then the disease can occur without the diarrhea, but the infection can still be transmitted—a process called asymptomatic carriage.


Mapping the development of infection-fighting immune cells

LA JOLLA—The immune system protects the body from invaders, such as bacteria, viruses, or tumors, with its intricate network of proteins, cells, and organs. Specialized immune cells, called cytotoxic T cells, can develop into short-lived effector cells that kill infected or cancerous cells within our bodies. A small portion of those effector cells remain after an infection and become longer-lived memory cells, which “remember” infections and respond when infections reappear. But little was known about what influences cytotoxic T cells to transform into these effector and memory T cell subtypes.


A new model for understanding human brain immune cells and neurological disorders

LA JOLLA—Situated at the intersection of the human immune system and the brain are microglia, specialized brain immune cells that play a crucial role in development and disease. Although the importance of microglia is undisputed, modeling and studying them has remained a difficult task.


Salk Institute launches collaboration with Autobahn Labs to accelerate drug discovery

LA JOLLA—The Salk Institute and Autobahn Labs, an early-stage drug discovery incubator, will work together to identify and advance promising initial scientific discoveries through the preliminary steps of drug discovery and development. Autobahn Labs will invest up to $5 million per project for Salk discoveries that require access to drug development expertise and state-of-the art capabilities.


Salk Institute promotes five faculty members in genetics, structural biology, immunobiology, and neuroscience

LA JOLLA—Five Salk Institute faculty members have been promoted for their notable, innovative contributions to science. These faculty members have demonstrated leadership in their disciplines, pushing the boundaries of basic scientific research. Assistant Professors Sung Han, Dmitry Lyumkis, and Graham McVicker were promoted to associate professors, and Associate Professors Sreekanth Chalasani and Ye Zheng were promoted to professors. The promotions were based on Salk faculty and nonresident fellow recommendations and approved by Salk’s president and Board of Trustees on April 21, 2023.


Salk Professor Susan Kaech elected to American Academy of Arts and Sciences

LA JOLLA—Salk Institute Professor Susan Kaech, director of the NOMIS Center for Immunobiology and Microbial Pathogenesis, has been elected to the American Academy of Arts and Sciences. She shares the honor with some of the world’s most accomplished leaders from science and technology, business, public affairs, education, the humanities, and the arts. Kaech and the new class of nearly 270 members will be inducted at a formal ceremony on September 30, 2023, at the Academy’s headquarters in Cambridge, Massachusetts.


Telomeres, mitochondria, and inflammation oh my! Three hallmarks of aging work together to prevent cancer

LA JOLLA—As we age, the end caps of our chromosomes, called telomeres, gradually shorten. Now, Salk scientists have discovered that when telomeres become very short, they communicate with mitochondria, the cell’s powerhouses. This communication triggers a complex set of signaling pathways and initiates an inflammatory response that destroys cells that could otherwise become cancerous.


Salk scientists develop compound that reverses gut inflammation in mice

LA JOLLA—A drug developed by Salk Institute researchers acts like a master reset switch in the intestines. The compound, called FexD, has previously been found to lower cholesterol, burn fat, and ward off colorectal cancer in mice. Now, the team reports in Proceedings of the National Academy of Sciences on December 12, 2022, that FexD can also prevent and reverse intestinal inflammation in mouse models of inflammatory bowel disease.


Salk scientists discover anti-inflammatory molecules that decline in the aging brain

LA JOLLA—Aging involves complicated plot twists and a large cast of characters: inflammation, stress, metabolism changes, and many others. Now, a team of Salk Institute and UC San Diego scientists reveal another factor implicated in the aging process—a class of lipids called SGDGs (3-sulfogalactosyl diacylglycerols) that decline in the brain with age and may have anti-inflammatory effects.


Trailblazing immunologist joins Salk faculty to study mother-baby immunity during pregnancy and breastfeeding

LA JOLLA—The Salk Institute welcomes Assistant Professor Deepshika Ramanan, an innovative researcher studying how the maternal immune system changes during pregnancy and breastfeeding and affects immunity and inflammation in babies across multiple generations. Ramanan will join Salk’s NOMIS Center for Immunobiology and Microbial Pathogenesis.


Scientists find surprising link between mitochondrial DNA and increased atherosclerosis risk

LA JOLLA— Mitochondria are known as cells’ powerhouses, but mounting evidence suggests they also play a role in inflammation. Scientists from the Salk Institute and UC San Diego published new findings in Immunity on August 2, 2022, where they examined human blood cells and discovered a surprising link between mitochondria, inflammation and DNMT3A and TET2—two genes that normally help regulate blood cell growth but, when mutated, are associated with an increased risk of atherosclerosis.


Salk researchers discover how RNA processing goes awry in rare immune disease

LA JOLLA—Researchers at the Salk Institute and King Abdullah University of Science and Technology (KAUST) in Saudi Arabia have discovered a new underlying cause of Wiskott-Aldrich syndrome, a rare genetic disease that leads to bleeding and immune deficiencies in babies. Their findings, published in the journal Nature Communications on June 25, 2022, revolve around how cells cut and paste strands of RNA in a process called RNA splicing. The genetic mutations associated with Wiskott-Aldrich syndrome, they found, disrupt this process which, in turn, prevents numerous immune and anti-inflammatory proteins from being made correctly.


Imaging solves mystery of how large HIV protein functions to form infectious virus

LA JOLLA—Understanding how HIV replicates within cells is key for developing new therapies that could help nearly 40 million people living with HIV globally. Now, a team of scientists from the Salk Institute and Rutgers University have for the first time determined the molecular structure of HIV Pol, a protein that plays a key role in the late stages of HIV replication, or the process through which the virus propagates itself and spreads through the body. Importantly, determining the molecule’s structure helps answer longstanding questions about how the protein breaks itself apart to advance the replication process. The discovery, published in Science Advances on July 6, 2022, reveals a new vulnerability in the virus that could be targeted with drugs.


Hair-raising research: Salk scientists find surprising link between immune system, hair growth

LA JOLLA—Salk scientists have uncovered an unexpected molecular target of a common treatment for alopecia, a condition in which a person’s immune system attacks their own hair follicles, causing hair loss. The findings, published in Nature Immunology on June 23, 2022, describe how immune cells called regulatory T cells interact with skin cells using a hormone as a messenger to generate new hair follicles and hair growth.


Cellular regeneration therapy restores damaged liver tissue faster than ever

LA JOLLA—Mammals can’t typically regenerate organs as efficiently as other vertebrates, such as fish and lizards. Now, Salk scientists have found a way to partially reset liver cells to more youthful states—allowing them to heal damaged tissue at a faster rate than previously observed. The results, published in Cell Reports on April 26, 2022, reveal that the use of reprogramming molecules can improve cell growth, leading to better liver tissue regeneration in mice.


How obesity can rewire the immune system and the response to immunotherapy—and how to change that

LA JOLLA—When mice with atopic dermatitis—a common type of allergic skin inflammation—are treated with drugs that target the immune system, their thickened, itchy skin generally heals quickly. But scientists have now discovered that the same treatment in obese mice makes their skin worse, instead. That is because obesity changes the molecular underpinnings of allergic inflammation, both in mice and humans.


Salk Professor Janelle Ayres named inaugural recipient of the Salk Institute Legacy Chair

LA JOLLA—Professor Janelle Ayres has been recognized for her contributions and dedication to advancing science through research by being named the inaugural recipient of the Salk Institute Legacy Chair, effective July 1, 2021.


The novel coronavirus’ spike protein plays additional key role in illness

LA JOLLA—Scientists have known for a while that SARS-CoV-2’s distinctive “spike” proteins help the virus infect its host by latching on to healthy cells. Now, a major new study shows that the virus spike proteins (which behave very differently than those safely encoded by vaccines) also play a key role in the disease itself.


Fast, portable test can diagnose COVID-19 and track variants

LA JOLLA—Clinicians using a new viral screening test can not only diagnose COVID-19 in a matter of minutes with a portable, pocket-sized machine, but can also simultaneously test for other viruses—like influenza—that might be mistaken for the coronavirus. At the same time, they can sequence the virus, providing valuable information on the spread of COVID-19 mutations and variants. The new test, dubbed NIRVANA, was described online today by a multi-institution team of scientists in the journal Med.


Salk’s NOMIS Center receives $9.5 million to shape the future of research into health and immunity

LA JOLLA—As we endure a global viral pandemic, our appreciation for health and immunity has never been greater. Now, thanks to a generous gift from the NOMIS Foundation, Salk’s NOMIS Center for Immunobiology and Microbial Pathogenesis will receive $9.5 million to grow and expand, while continuing to be a leader in health and immunity research.


Salk Assistant Professor Dmitry Lyumkis receives CAREER award from NSF

LA JOLLA—Assistant Professor Dmitry Lyumkis has received a Faculty Early Career Development Program (CAREER) award from the National Science Foundation (NSF). The CAREER award supports early career scientists who serve as academic role models and lead scientific advances in their organization. Lyumkis will receive almost $1.8 million over four years to examine how some viruses such as HIV hijack and interact with host protein machinery to permanently alter the host genome to sustain infection.


Common diabetes drug reverses inflammation in the liver

LA JOLLA—The diabetes drug metformin—derived from a lilac plant that’s been used medicinally for more than a thousand years—has been prescribed to hundreds of millions of people worldwide as the frontline treatment for type 2 diabetes. Yet scientists don’t fully understand how the drug is so effective at controlling blood glucose.


Salk scientists discover genetic “dial” to turn immune function up and down to target cancer, autoimmune disease

LA JOLLA—The human immune system is a finely-tuned machine, balancing when to release a cellular army to deal with pathogens, with when to rein in that army, stopping an onslaught from attacking the body itself. Now, Salk researchers have discovered a way to control regulatory T cells, immune cells that act as a cease-fire signal, telling the immune system when to stand down.


Giant leap in diagnosing liver disease

LA JOLLA—Chronic liver disease represents a major global public health problem affecting an estimated 844 million people, according to the World Health Organization. It is among the top causes of mortality in Australia, the UK and the United States. At the same time, it is both difficult to manage and there is no FDA-approved anti-fibrotic liver therapy. The microbiome—a complex collection of microbes that inhabit the gut—may be an unexpected indictor of health. Now, a collaborative team of Salk Institute and UC San Diego scientists have created a novel microbiome-based diagnostic tool that, with the accuracy of the best physicians, quickly and inexpensively identifies liver fibrosis and cirrhosis over 90 percent of the time in human patients.


Salk researchers accelerate, expand COVID-19 research

LA JOLLA—As the COVID-19 pandemic continues across the globe, the Salk Institute joins in efforts to understand the fundamental science behind the novel coronavirus to pave the way to treatments and cures. COVID-19 exploits a vulnerability in the immune system’s armor: because the SARS-CoV-2 virus—the novel coronavirus that causes COVID-19—appeared in humans recently, our immune systems have no experience with the virus—and sometimes have difficulty fighting it.


How targeting killer T cells in the lungs could lead to immunity against respiratory viruses

LA JOLLA—A significant site of damage during COVID-19 infection is the lungs. Understanding how the lungs’ immune cells are responding to viral infections could help scientists develop a vaccine.


Imaging study of key viral structure shows how HIV drugs work at atomic level

LA JOLLA—Salk scientists have discovered how a powerful class of HIV drugs binds to a key piece of HIV machinery. By solving, for the first time, three-dimensional structures of this complex while different drugs were attached, the researchers showed what makes the therapy so potent. The work, which appeared in Science on January 30, 2020, provides insights that could help design or improve new treatments for HIV.


New target for autoimmune disease could enable therapies with fewer side effects

LA JOLLA—Your immune system comes ready for battle against bacteria, viruses, fungi and even cancer. But in cases of autoimmune disease, the immune system’s superpowers turn it into a supervillain. Now, Salk Institute scientists have discovered a way to stop certain immune system cells from mistakenly attacking the body. Their findings, published the week of August 26, 2019, in the journal Proceedings of the National Academy of Sciences, suggest a new way to target Th17 helper T cells, a type of immune cell that produces interleukin 17, a molecule known to be at the root of autoimmune diseases such as multiple sclerosis, rheumatoid arthritis and psoriasis. Previous efforts targeting Th17 helper T cells have had limited success.


Salk promotes three leading scientists in the fields of infectious disease, neurobiology and biological networks

LA JOLLA—Three Salk Institute faculty members have been promoted after the latest round of faculty reviews determined they are scientific leaders who have made original, innovative and notable contributions to biological research.


Salk’s Janelle Ayres awarded $1.8 million by NOMIS Foundation for novel research on mechanisms to promote health

LA JOLLA—Associate Professor Janelle Ayres has been awarded $1.8 million over two years by the NOMIS Foundation to study health as an active process in which microbes—including the trillions of microorganisms that call the human body home—initiate interactions that promote the health of the host.


Salk’s Janelle Ayres receives NIH Pioneer Award for novel approaches to infectious disease

LA JOLLA—Associate Professor Janelle Ayres has been awarded a 2018 NIH Director’s Pioneer Award by the National Institutes of Health for her innovative research into host-pathogen interactions that promote the health of the host.


Decoding the structure of an RNA-based CRISPR system

LA JOLLA—Over the past several years, CRISPR-Cas9 has moved beyond the lab bench and into the public zeitgeist. This gene-editing tool holds promise for correcting defects inside individual cells and potentially healing or preventing many human ailments. But the Cas9 system alters DNA, not RNA, and some experts believe that being able to modify RNA ultimately may prove just as useful.


Electron microscopy provides new view of tiny virus with therapeutic potential

LA JOLLA—The imaging method called cryo-electron microscopy (cryo-EM) allows researchers to visualize the shapes of biological molecules with an unprecedented level of detail. Now a team led by researchers from the Salk Institute and the University of Florida is reporting how they used cryo-EM to show the structure of a version of a virus called an AAV2, advancing the technique’s capabilities and the virus’ potential as a delivery vehicle for gene therapies.


Bribing bacteria to play nicely is good for everyone

LA JOLLA—Antibiotic use is driving an epidemic of antibiotic resistance, as more susceptible bacteria are killed but more resilient strains live on and multiply with abandon. But if antibiotics aren’t the end-all solution for infectious disease, what is?


Janelle Ayres receives $1 million from W. M. Keck Foundation for infectious disease research

LA JOLLA—Associate Professor Janelle Ayres is the recipient of a $1 million grant from the W. M. Keck Foundation to study new ways to treat deadly infections including sepsis and the flu, both of which require novel therapies beyond antibiotics and antivirals to effectively combat.


Salk Institute’s Janelle Ayres wins Blavatnik National Award for Young Scientists

LA JOLLA—Salk Associate Professor Janelle Ayres has been named one of three winners of the Blavatnik National Awards for Young Scientists, one of the world’s largest unrestricted prizes for early career scientists. Ayres, the laureate in the life sciences category, will receive $250,000 for her pioneering research in physiology and the study of the how bacteria interact with humans. Ayres’ work is revolutionizing our understanding of host-pathogen interactions and has the potential to solve one of the greatest current public health threats: anti-microbial resistance.


Discovery reveals how cells try to control levels of key HIV protein

LA JOLLA—One of the many challenges in treating HIV is that the virus can lie dormant in cells, quietly evading immune detection until it suddenly roars to life without warning and begins replicating furiously. Salk Institute researchers discovered a small molecule called JIB-04 that destroys the HIV protein called Tat, responsible for revving up the virus.


Janelle Ayres is finalist for Blavatnik National Award for Young Scientists

LA JOLLA—Associate Professor Janelle Ayres is one of 31 US finalists selected to compete for the world’s largest unrestricted prizes for early career researchers, the Blavatnik National Awards for Young Scientists. The Blavatnik National Awards recognize both the past accomplishments and the future promise of the most talented scientific and engineering researchers aged 42 years and younger at America’s top academic and research institutions.


Immune cell policing offers insights into cancer, autoimmune disease

LA JOLLA—Regulatory T cells (Tregs) are the traffic cops of the immune system. They instruct other types of immune cells on when to stop and when to go. Learning how to direct the activity of Tregs has important implications for improving cancer immunotherapy as well as developing better treatments for autoimmune diseases such as rheumatoid arthritis and type 1 diabetes.


Tilted microscopy technique better reveals protein structures

LA JOLLA—The conventional way of placing protein samples under an electron microscope during cryo-EM experiments may fall flat when it comes to getting the best picture of a protein’s structure. In some cases, tilting a sheet of frozen proteins—by anywhere from 10 to 50 degrees—as it lies under the microscope, gives higher quality data and could lead to a better understanding of a variety of diseases, according to new research led by Salk scientist Dmitry Lyumkis.


Salk promotes two dynamic scientists who study the microbiome and neurobiology

LA JOLLA—Two Salk Institute faculty members have been promoted based on their innovative and notable contributions to biological research.


Feed a cold, starve a fever? Not so fast, according to Salk research

LA JOLLA—The last time you had a stomach bug, you probably didn’t feel much like eating. This loss of appetite is part of your body’s normal response to an illness but is not well understood. Sometimes eating less during illness promotes a faster recovery, but other times—such as when cancer patients experience wasting—the loss of appetite can be deadly.


Curb your immune enthusiasm

LA JOLLA—Normally when we think of viruses, from the common cold to HIV, we want to boost people’s immunity to fight them. But for scientists who develop therapeutic viruses (to, for example, target cancer cells or correct gene deficiencies) a more important question is: How do we keep people’s natural immune responses at bay? In these cases, an overenthusiastic immune response actually undermines the therapy.


Salk scientists crack the structure of HIV machinery

LA JOLLA—Salk Institute scientists have solved the atomic structure of a key piece of machinery that allows HIV to integrate into human host DNA and replicate in the body, which has eluded researchers for decades. The findings describing this machinery, known as the “intasome,” appear January 6, 2017, in Science and yield structural clues informing the development of new HIV drugs.


Helmsley-Salk fellow garners prestigious microscopy award

Helmsley-Salk Fellow Dmitry Lyumkis has been awarded the 2016 George Palade Award by the Microscopy Society of America. The award is given for distinguished contributions to the field of microscopy and microanalysis in the life sciences of an early career scientist.


Super-resolution microscopy reveals unprecedented detail of immune cells’ surface

LA JOLLA—When the body is fighting an invading pathogen, white blood cells—including T cells—must respond. Now, Salk Institute researchers have imaged how vital receptors on the surface of T cells bundle together when activated.


Genetic switch turned on during fasting helps stop inflammation

LA JOLLA—A molecular pathway that is activated in the brain during fasting helps halt the spread of intestinal bacteria into the bloodstream, according to a new study by a team of researchers at the Salk Institute.


Protein structure illuminates how viruses take over cells

LA JOLLA—Using cutting-edge imaging technology, Salk Institute and Harvard Medical School researchers have determined the structure of a protein complex that lets viruses similar to the human immunodeficiency virus (HIV) establish permanent infections within their hosts.


‘Superhero’ microbiome bacteria protect against deadly symptoms during infection

LA JOLLA–As concerns over deadly antibiotic-resistant strains of ‘superbug’ bacteria grow, scientists at the Salk Institute are offering a possible solution to the problem: ‘superhero’ bacteria that live in the gut and move to other parts of the body to alleviate life-threatening side effects caused by infections.


Janelle Ayres receives Young Faculty Award from DARPA

LA JOLLA–Salk Institute scientist Janelle Ayres has received an award of $500,000 over two years from the Defense Advanced Research Projects Agency (DARPA) to further her research on bolstering a person’s microbiome to help their body overcome an infection. The award comes with the possibility of an additional $500,000 for a third year.


New insight into how the immune system sounds the alarm

LA JOLLA–T cells are the guardians of our bodies: they constantly search for harmful invaders and diseased cells, ready to swarm and kill off any threats. A better understanding of these watchful sentries could allow scientists to boost the immune response against evasive dangers (e.g., cancer or infections), or to silence it when it mistakenly attacks the body itself (e.g., autoimmune disorders or allergies).


Immune system-in-a-dish offers hope for “bubble boy” disease

LA JOLLA–For infants with severe combined immunodeficiency (SCID), something as simple as a common cold or ear infection can be fatal. Born with an incomplete immune system, kids who have SCID–also known as “bubble boy” or “bubble baby” disease–can’t fight off even the mildest of germs. They often have to live in sterile, isolated environments to avoid infections and, even then, most patients don’t live past a year or two. This happens because stem cells in SCID patients’ bone marrow have a genetic mutation that prevents them from developing critical immune cells, called T and Natural Killer (NK) cells.


Cellular scissors chop up HIV virus

LA JOLLA–Imagine a single drug that could prevent human immunodeficiency virus (HIV) infection, treat patients who have already contracted HIV, and even remove all the dormant copies of the virus from those with the more advanced disease. It sounds like science fiction, but Salk scientists have gotten one step closer to creating such a drug by customizing a powerful defense system used by many bacteria and training this scissor-like machinery to recognize the HIV virus.


In a healthy gut, microbes wax and wane throughout the day

LA JOLLA–Taking a single snapshot of all the bacteria that live in a mouse’s–or person’s–stomach and intestines can capture the health of the organism’s digestive system and even their risk of developing immune diseases and cancers. But it might take more than one snapshot to get a full picture, Salk researchers have discovered.


Salk scientist receives 2014 Ray Thomas Edwards Foundation Career Development Award

Janelle Ayres, Salk assistant professor in the Nomis Foundation Laboratories for Immunobiology and Microbial Pathogenesis, has been selected to receive the prestigious Ray Thomas Edwards Foundation Career Development Award. Only one three-year grant is conferred annually, aiming to foster the development of a promising early career biomedical researcher in San Diego County and to help him or her make the transition to becoming an independent investigator.


A new dent in HIV-1’s armor

LA JOLLA–Like a slumbering dragon, HIV can lay dormant in a person’s cells for years, evading medical treatments only to wake up and strike at a later time, quickly replicating itself and destroying the immune system.



Simple method turns human skin cells into immune-fighting white blood cells

LA JOLLA—For the first time, scientists have turned human skin cells into transplantable white blood cells, soldiers of the immune system that fight infections and invaders. The work, done at the Salk Institute, could let researchers create therapies that introduce into the body new white blood cells capable of attacking diseased or cancerous cells or augmenting immune responses against other disorders.


Genetic signal prevents immune cells from turning against the body

LA JOLLA–When faced with pathogens, the immune system summons a swarm of cells made up of soldiers and peacekeepers. The peacekeeping cells tell the soldier cells to halt fighting when invaders are cleared. Without this cease-fire signal, the soldiers, known as killer T cells, continue their frenzied attack and turn on the body, causing inflammation and autoimmune disorders such as allergies, asthma, rheumatoid arthritis, multiple sclerosis and type 1 diabetes.


First appointment in new Salk Fellows Program

LA JOLLA—The Salk has launched a new initiative called the Salk Fellows Program. The program brings scientists from broad disciplines to the Institute to trigger innovation and perpetuate the collaborative spirit of the Salk.


Salk lab turns skin cells into human airway tissue

LA JOLLA—Using reprogrammed skin cells, researchers have for the first time used stem cell techniques to grow fully functional assemblies of the cells that line airways leading to the lungs. The lab-grown airway tissue can now be used to study the molecular basis for lung diseases—from rare genetic disorders to common afflictions like asthma and emphysema—and test new drugs to treat the diseases.


Salk microflora researcher Janelle Ayres named Searle Scholar

LA JOLLA—Janelle Ayres, assistant professor at Salk Institute’s Nomis Foundation Laboratories for Immunobiology and Microbial Pathogenesis, has received the prestigious Searle Scholar award, which each year is given to only 15 researchers in the fields of chemical and biological sciences.


Potent mechanism helps viruses shut down body’s defense system against infection

LA JOLLA, CA—Researchers at the Salk Institute for Biological Studies have discovered a powerful mechanism by which viruses such as influenza, West Nile and Dengue evade the body’s immune response and infect humans with these potentially deadly diseases. The findings may provide scientists with an attractive target for novel antiviral therapies.


Remembering Ian Trowbridge

Ian Trowbridge, an esteemed researcher who had been a member of the Salk faculty for almost three decades, passed away on Wednesday, February 6.


A rare feat: Two scientists at Salk score NIH New Innovator awards

LA JOLLA, CA—The Salk Institute announced today that researchers Björn Lillemeier, and Axel Nimmerjahn, have been named recipients of the prestigious 2012 National Institutes of Health (NIH) Director’s New Innovator Award.


Salk scientists discover molecular link between circadian clock disturbances and inflammatory diseases

LA JOLLA, CA—Scientists have known for some time that throwing off the body's circadian rhythm can negatively affect body chemistry. In fact, workers whose sleep-wake cycles are disrupted by night shifts are more susceptible to chronic inflammatory diseases such as diabetes, obesity and cancer.


Salk Scientist appointed inaugural holder of Françoise Gilot-Salk Chair

LA JOLLA, CA—The Salk Institute is pleased to announce that faculty member Greg Lemke has been named the inaugural holder of the Françoise Gilot-Salk Chair, in recognition of his significant research accomplishments and scientific leadership.


Ferring Pharmaceuticals donates $10 million to the Salk Institute for Biological Studies

Saint Prex, Switzerland—Ferring Pharmaceuticals, a global, specialty biopharmaceuticals company, has donated $10 million to support research at the Salk Institute for Biological Studies in La Jolla, California. In addition to funding the highest scientific priorities at the Salk, the Ferring gift will enable the creation of the Françoise Gilot-Salk endowed Chair, which will be used to support research on the role that TAM receptors play in immune regulation. These receptors, which were discovered in Professor Greg Lemke‘s Molecular Neurobiology Laboratory at the Salk Institute, are central inhibitors of the innate immune response to bacteria, viruses and other pathogens. The Ferring gift will also continue the endowment of the Frederik Paulsen Chair in Neurosciences, named after Ferring’s founder and first established in 2000.


Salk discovery may lead to safer treatments for asthma, allergies and arthritis

LA JOLLA, CA—Scientists have discovered a missing link between the body's biological clock and sugar metabolism system, a finding that may help avoid the serious side effects of drugs used for treating asthma, allergies and arthritis.


New anti-inflammatory drugs might help avoid side effects of steroids

LA JOLLA, CA—A new class of anti-inflammatory drugs may one day serve as an alternative to steroid medications and possibly help avoid the serious side effects of steroids, based on research findings at the Salk Institute for Biological Studies.


Molecular “trip switch” shuts down inflammatory response

La Jolla, CA – Like a circuit breaker that prevents electrical wiring from overheating and bringing down the house, a tiny family of three molecules stops the immune system from mounting an out-of-control, destructive inflammatory response against invading pathogens, researchers at the Salk Institute for Biological Studies have found.


Bone marrow cells hand natural killer cells their license to attack dangerous invaders

La Jolla, CA – A collaboration between scientists at the Salk Institute for Biological Studies and the Pasteur Institute in Paris has uncovered the molecular signals that trigger maturation of natural killer cells, an important group of immune system cells, into fully armed killing machines. Their findings will be published in a forthcoming issue of Nature Immunology.


‘Fail safe’ mechanism that helps keep inflammation in check

La Jolla, CA – Shutting down a master activator of the body's inflammatory response – which is the goal of several experimental drugs now in development for the treatment of arthritis – may create even more inflammation with its associated pain and swelling in the body.