rheumatoid arthritis Archives - Sanford Burnham Prebys
Institute News

Protein superfamily crucial to the immune system experiences Broadway-style revival

AuthorGreg Calhoun
Date

November 19, 2024

More than 25 years after targeting a member of this superfamily of proteins led to groundbreaking treatments for several autoimmune diseases including rheumatoid arthritis and Crohn’s disease, San Diego scientists note a resurgence of interest in research to find related new drug candidates.

In 1998, the same year “Footloose” debuted on Broadway, REMICADE® (infliximab) was approved by the FDA for the treatment of Crohn’s disease. This was the first monoclonal antibody ever used to treat a chronic condition, and it upended the treatment of Crohn’s disease.

Research published in February 2024 demonstrated better outcomes for patients receiving infliximab or similar drugs right after diagnosis rather than in a “step up” fashion after trying other more conservative treatments such as steroids.

Infliximab and ENBREL® (etanercept) — also approved in 1998 to treat rheumatoid arthritis — were the first FDA-approved tumor necrosis factor-α (TNF) inhibitors. TNF is part of a large family of signaling proteins known to play a key role in developing and coordinating the immune system.

The early success of infliximab and etanercept generated excitement among researchers and within the pharmaceutical industry at the possibility of targeting other members of this protein family. They were interested in finding new protein-based (biologics) drugs to alter inflammation that underlies the destructive processes in autoimmune diseases.

As “Footloose” made it back to Broadway in 2024 for the first time since its initial run, therapies targeting the TNF family are in the midst of their own revival. Carl Ware, PhD, a professor in the Immunity and Pathogenesis Program at Sanford Burnham Prebys, and collaborators at the La Jolla Institute for Immunology and biotechnology company Inhibrx, report in Nature Reviews Drug Discovery that there is a resurgence of interest and investment in these potential treatments.

“Many of these signaling proteins or their associated receptors are now under clinical investigation,” said Ware. “This includes testing the ability to target them to treat autoimmune and inflammatory diseases, as well as cancer.”

Today, there are seven FDA-approved biologics that target TNF family members to treat autoimmune and inflammatory diseases. There also are three biologics and two chimeric antigen receptor (CAR)-T cell-based therapies targeting TNF members for the treatment of cancer. This number is poised to grow as Ware and his colleagues report on the progress of research and many clinical trials to test new drugs in this field and repurpose currently approved drugs for additional diseases.

“The anticipation levels are high as we await the results of the clinical trials of these first-, second- and — in some cases — third-generation biologics,” said Ware.

Ware and his coauthors also weighed in on the challenges that exist as scientists and drug companies develop therapies targeting the TNF family of proteins, as well as opportunities presented by improvements in technology, computational analysis and clinical trial design.

Portrait of Carl Ware

Carl Ware, PhD, is a professor in the Immunity and Pathogenesis Program at Sanford Burnham Prebys.

“There are still many hurdles to get over before we truly realize the potential of these drugs,” noted Ware. “This includes the creation of more complex biologics that can engage several different proteins simultaneously, and the identification of patient subpopulations whose disease is more likely to depend on the respective proteins being targeted.

“It will be important for researchers to use computational analysis of genetics, biomarkers and phenotypic traits, as well as animal models that mimic these variables. This approach will likely lead to a better understanding of disease mechanisms for different subtypes of autoimmune conditions, inflammatory diseases, and cancer, enabling us to design better clinical trials where teams can identify the appropriate patients for each drug.”

Institute News

5 lessons I’ve learned from rheumatoid arthritis and why I’m grateful to scientists who can change my world

AuthorMonica May
Date

June 26, 2019

Angela Durazo was a rising star triathlete—racking up age-group wins and corporate sponsorships. Then a diagnosis with rheumatoid arthritis, an autoimmune disorder caused by the immune system attacking healthy tissue, turned her life upside down. Here, she shares her story—including her new journey as a race car driver—and explains why research taking place at Institutes such as Sanford Burnham Prebys is critical to developing medicines that could help her and the 350 million people worldwide who live with the condition. 

I never thought of myself as an athlete. I was a cheerleader in high school and then participated in basketball for fun, but I wasn’t invested in the sports. Then some years and trials and tribulations later, seeking to find strength within myself, I accepted an invitation to cheer on a friend and I witnessed a triathlon. 

Instantly something spoke to me. The grit, determination, discipline. I was immediately enamored. I needed to do one, but I didn’t know if I could do it. All I knew was I had to try. And so I did. And it was in triathlon, where I truly found myself. Until a diagnosis rocked my world. 

Before I was diagnosed—a journey in itself—I’d never heard of rheumatoid arthritis (RA). No one in my family had it. No one in my life had it. However, I would soon come to find what living with this disease meant. I wouldn’t wish it on my worst enemy. 

First, I noticed stiffness in my hands when I woke up. I thought I might have slept on them wrong. But it kept happening night after night after night. Then it started affecting my workouts. During my runs, I started feeling like I had sandbags strapped around my legs. Unspeakable, unrelenting pain in my arm started. It felt—and still feels during a flare up—like someone is scraping my bone with a hot knife.  

Unable to keep up with training due to the pain and fatigue, I retired from triathlon after seven years. Little did I know the journey that would unfold next—taking me through dozens of doctors, two more career changes (I had a brief endeavor in acting in which I won a Best Actress Award for lead actress in an International feature film) and ultimately leading me to my life’s passion: race car driving. 

My experience continues to teach me so much. Now, nearly ten years after my diagnosis, I feel like I’ve finally crawled my way out of hell. To a healthy person, that may sound like an exaggeration. But to anyone who struggles with RA or any chronic diseases, they will know exactly what I mean.

Here are five lessons I have learned as a person reclaiming my life despite living with RA:

Trust yourself. I knew in my heart that something was deeply wrong. However, as a young, seemingly healthy athlete, doctors thought I was simply overtraining. One even floated the idea that I was a hypochondriac (I won’t repeat what I told that doctor.) Finally, after a year and a half of doctor visits, I stumbled across the term “rheumatoid arthritis” on the Internet. I convinced my doctor to test for RA and I finally had my answer. It couldn’t come soon enough: At this point my hands had begun to puff and distend (ulnar deviation). 

RA is a disability. When I started competing in paratriathlons, created for people with physical disability, some people questioned if I was really disabled. What these individuals didn’t understand is that—even though invisible from the outside—RA caused permanent damage to my mobility. In addition to the arthritis, it eroded my tendons and bursas (fluid-filled sacs that cushion the bone). Even when medicated, I couldn’t rely on my body. One day you can be fine and the next day you aren’t. One day I could run like a gazelle and the next day I feel like I have sandbags on my legs. My coach and those closest to me saw these effects firsthand. In fact, arthritis is a leading cause of work disability in the U.S., according to the Centers for Disease Control and Prevention (CDC).

Your disease does not define you. I still get chills when I think about the moment that I sat in a Formula race car for the first time. This was eight years after my diagnosis. I felt like I had found my spirit that had been missing since my retirement from triathlon. Race car driving is tough on my hands—Formula cars do not have power steering, amplified by G-forces generated by driving more than 160 miles per hour. I have to work twice as hard to keep my strength up. But frankly, I would work three times as hard if needed. I am not letting RA prevent me from pursuing my passion. 

Develop healthy coping skills. Between doctors saying that you won’t walk again and often having to prove your illness, paying attention to mental health is incredibly important for people with RA or any chronic disease. I struggled deeply with depression—and at one point alcohol—and I know many others who also struggle with unhealthy coping mechanisms. Find your support group. Go to therapy. I went to intensive trauma therapy for well over a year to accept the loss of my old body and learn how to embrace this new body with RA. One piece of advice that my trauma specialist told me which transcends any health condition: “RA has already taken so much from you, do not let it take anymore. Turn your pain into power and fight.”

When medicines fail, research is hope. New drugs such as biologics are wonderful. I was incredibly hopeful when I first learned about them. But they only work for one-third of patients. For the other two-thirds of the RA population, we are left figuring it out on our own. And there is so much we don’t know—from what triggers the immune system’s attack to why certain people respond to treatments and others don’t. Get engaged in your research foundations. Attend events. Join Facebook groups. And don’t be afraid to ask questions. YOU are your biggest advocate.

I took this year off racing to heal my body with an experimental treatment, which is working. Now, I’m recalibrating and looking forward to next year’s adventure—IndyCar development—and taking some podiums! 

I believe whole heartedly that one-day we will have a cure for RA. Until then, I hope that others with RA know they aren’t alone, and that as long as autoimmune research advances at Institutes such as Sanford Burnham Prebys, we have hope for the future.

Read more about Angela Durazo at Today.com or watch her share her story.

Institute News

An evening with autoimmune disorder experts

AuthorMonica May
Date

June 26, 2019

On June 20, 2019, nearly 100 community members, including many people living with autoimmune disorders and their loved ones, joined us at our latest SBP Insights event. The discussion featured unique perspective from three experts—a scientist, a doctor and a patient—on a single topic: autoimmune disorders. 

More than 50 million Americans have an autoimmune disorder, such as Crohn’s disease, psoriasis or rheumatoid arthritis. These conditions are often painful, chronic and debilitating. For unknown reasons, more than 80 percent of these patients are women. 

Scientists know these disorders occur when the immune system mistakenly attacks healthy tissue. But researchers still don’t understand why immunosuppressive treatments don’t work for everyone or know the initial trigger that causes the immune system to misfire. Answers to these fundamental questions could unlock insights that lead to new, effective medicines. 

“Before I was diagnosed, I thought doctors had it all sorted out. Now I know there is so much they don’t know,” says 17-year-old Madison Koslowski, who was diagnosed last year with juvenile idiopathic arthritis. She uses a wheelchair and cane for mobility while she works with her doctor to find a treatment that relieves her intense joint pain. “Right now, my friends are planning their future and figuring out where they will go to college. But for me, there are so many unknowns. I don’t know if I’m going to respond to the next medicine we try or if I will be really sick. I feel like my life is on pause. I have no idea when it will start again.”

Madison traveled from Los Angeles with her mother and a friend to hear race-car driver Angela Durazo speak about her journey with rheumatoid arthritis and learn what’s on the horizon for autoimmune treatments (read Angela’s story).

Following Angela’s presentation, Carl Ware, PhD, professor and director of the Infectious and Inflammatory Diseases Center at Sanford Burnham Prebys, took the stage and provided an overview of the science behind autoimmune disease. Ware also described his ongoing research collaboration with Eli Lilly, which recently led to a new Phase 1 clinical trial for autoimmune disorders. 

Hal Hoffman, MD, chief, division of allergy, immunology and rheumatology at UCSD and Rady Children’s Hospital, wrapped up the discussion with an overview of how he and his team are turning to rare immune disorders to understand the conditions as a whole. A Q&A followed the brief presentations. 

17-year-old Madison Koslowski (right), who was diagnosed last year with juvenile idiopathic arthritis, poses with race-car driver Angela.

17-year-old Madison Koslowski (right), who was diagnosed last year with juvenile idiopathic arthritis, poses with race-car driver Angela.

The discussion was moderated by Zaher Nahle, PhD, CEO of the Arthritis National Research Foundation.

Join us at our next SBP Insights discussion, which focuses on pancreatic cancer and takes place on November 21, 2019. Event details.

Institute News

Meet Clyde Campbell: A new PhD graduate

AuthorMonica May
Date

June 17, 2019

When Clyde Campbell was 6 years old, his life changed overnight. 

“I went to sleep, and everything was completely normal. But when I woke up, my knee had swollen to three times its usual size and was stuck in a 90-degree position. I learned I had juvenile rheumatoid arthritis, which then spread throughout my body—and no one knew why this had happened.”

Like the adult form, juvenile rheumatoid arthritis occurs when the immune system attacks healthy tissue. But much remains unknown—including the initial trigger that causes the body to misfire—and treatments are limited. This mystery sparked Campbell’s interest in science and desire to understand the ‘why’ behind disease—and thus create better medicines.

After obtaining a bachelor’s degree in molecular biology from UC San Diego, Campbell applied to Sanford Burnham Prebys’ Graduate School in hopes of working with his scientific hero, Duc Dong, PhD, assistant professor in the Human Genetics Program. 
 
“When I completed my work at UC San Diego, everyone spoke highly of Dr. Dong and the thoroughness of his science. I knew very early on that I wanted to work with him,” says Campbell. “Sanford Burnham Prebys’ graduate school was attractive to me because the program allows you to start working with your PhD advisor right away—so I met with Dr. Dong and began my research.”   

Last month, Campbell completed his doctorate, the 40th PhD awarded by the Graduate School.  His thesis, completed under Dong’s guidance, demonstrated his success in reprogramming developing cells within a zebrafish (mesoderm- and ectoderm-derived cells) into the cells that become the pancreas (pancreatic progenitors), an important advance for people with type 1 diabetes (insulin is released from cells in the pancreas). Current cell-based treatments rely upon cadaver-sourced cells, which are effective but are unable to meet patient demand.

Campbell will carry his training and knowledge of cellular differentiation to Iowa State University, where he’s accepted a position as an adjunct associate professor. There, he will continue his regenerative medicine work, with a new focus on blood cell differentiation. This work could lead to treatments for children with leukemia and people battling other blood disorders. As a father to a 3-year-old daughter, his research now takes on special meaning.

“As a society, one of the most important things we can do for future generations is impart new knowledge. With research comes powerful insights—which could lead to cures. One day, I hope no child or adult will have to go through my experience.” 

Learn about Sanford Burnham Prebys’ Graduate School. 

Check out our upcoming SBP Insights event, held on June 20, 2019, which features a doctor, scientist and patient discussing rheumatoid arthritis and other autoimmune diseases.

Interested in keeping up with our latest discoveries, upcoming events and more? Subscribe to our monthly newsletter, Discoveries.

Institute News

Year in review: SBP highlights from 2018

AuthorMonica May
Date

December 17, 2018

The science never stops at Sanford Burnham Prebys Medical Discovery Institute (SBP), and 2018 was no different. 

From an Alzheimer’s breakthrough to advancing promising medicines for pancreatic cancer and autoimmune disorders, our hardworking scientists were busy at the bench and beyond. As the year comes to a close, we are sharing a selection of our most widely read stories from the past 12 months. 

1.    Scientists uncover a potential near-term treatment for Alzheimer’s disease 
Jerold Chun, MD, PhD, and his team revealed that never-before-seen DNA recombination in the brain is linked to Alzheimer’s disease. The research suggests that existing FDA-approved drugs to treat HIV might hold potential as near-term Alzheimer’s treatments and provide an explanation for why previous clinical trials for Alzheimer’s disease have failed. The study was published in Nature.

2.    SBP women awarded American Heart Association Fellowships
The American Heart Association awarded grants to three SBP scientists. This funding advances projects that align with the organization’s mission of building healthier lives, free of cardiovascular disease and stroke. 

3.    Compound discovered at SBP enters Phase 1 clinical trial for pancreatic cancer
Solid tumors are often surrounded by thick fibrotic walls, making it hard for treatments to get access to the tumor cells. CEND-1, a drug candidate discovered in the lab of Erkki Ruoslahti, MD, PhD, has entered a Phase 1 clinical trial for metastatic pancreatic cancer. CEND-1 streamlines the delivery of cancer drugs deep into tumors. CEND-1 was licensed to the private company DrugCendR Inc. in 2015. 

4.    Scientists solve a medical mystery
Hudson Freeze, PhD, and his team joined collaborators around the globe to crack the case of Saul-Wilson syndrome, a rare form of dwarfism with an unknown cause. Now, the 14 known people with the syndrome and their families have answers: A gene alteration that affects the cell’s protein packager, the Golgi complex, causes the condition. 

5.    Immune therapy developed through SBP and Lilly collaboration enters Phase 1 clinical trial
A therapy that arose from a research collaboration between Eli Lilly and Company (Lilly) and SBP entered a Phase 1 clinical trial. The therapy is a biologic that inhibits inflammation—a common response linked to autoimmune diseases such as rheumatoid arthritis, lupus and inflammatory bowel disease.

Interested in keeping up with SBP’s latest discoveries, upcoming events and more? Subscribe to our monthly newsletter, Discoveries.

To help SBP scientists focus on pioneering research that transforms human health, donate now. 

Institute News

Rheumatoid arthritis drug works by restoring balance to immune cells

AuthorJessica Moore
Date

September 29, 2016

In rheumatoid arthritis, the immune system’s patrollers—T cells—see the membrane that surrounds joints as a threat, and engage other immune cells to destroy it. Worse, those misguided T cells become hyperactive. Instead of dying when they should, they continue to fuel inflammation that breaks down the joint tissue.

Scientists led by Salvatore Albani, MD, PhD, an adjunct professor in the Immunity and Pathogenesis Program, have now found a way to return these manic, long-lived T cells to normal—and conveniently, in a drug called hydroxychloroquine, which is already approved to treat symptoms of rheumatoid arthritis. The new results are published in the European Journal of Immunology.

“Hydroxychloroquine is already being used to treat various autoimmune diseases including rheumatoid arthritis,” said Albani. “But, by revealing its mechanisms, we will now be able to develop a better drug for these disabling diseases.”

Rheumatoid arthritis is one of the most common autoimmune diseases, affecting 1.5 million adults in the U.S. Severe joint pain, swelling and stiffness make it challenging for patients to accomplish everyday tasks, and many are easily fatigued. Even with new treatments that have become available in recent years, only 20-40% of patients can keep symptoms at bay over the long term.

 

In the new study, Albani and his team wondered how overactive T cells survive in rheumatoid arthritis. They realized that the cells might require more energy and molecular building blocks than they could generate using standard metabolic pathways. An important cellular process called autophagy—the breakdown of large molecules and organelles for reuse, which is ramped up during starvation—was the first place they thought to look.

Just as they suspected, rates of autophagy were higher in the T cells of patients with rheumatoid arthritis, compared with healthy individuals. Applying hydroxychloroquine to those T cells restored their normal lifespans. The researchers also used a well-established mouse model of rheumatoid arthritis to show that hydroxychloroquine reduced joint swelling.

According to Albani, not all patients respond to hydroxychloroquine. “We think it may work best at early stages of the disease, when T cells are most important,” he said. “We plan to further explore that possibility, as well as ways to improve the outcomes of treating rheumatoid arthritis with autophagy inhibitors.”

The paper is available online here.

Institute News

Structure of immune-regulating ubiquitin ligase solved

Authorjmoore
Date

January 20, 2016

Scientists at SBP have solved the atomic structure of a unique ubiquitin ligase complex that attaches ubiquitins to proteins in linear chains. The study, published in Nature, opens the door for developing a novel class of drug targets for cancer as well as inflammatory diseases such as rheumatoid arthritis, Crohn’s disease and psoriasis.

“Our new research revealing the fully active structure of HOIP, an RBR E3 ligase, holds significant therapeutic potential in oncology and immunology,” said Bernhard Lechtenberg, PhD, postdoctoral fellow at SBP and lead author of the study. “The three-dimensional structure we present provides detailed insights into the molecular architecture of the complex and allows us to draw conclusions about how it works.”

Ubiquitin is a small protein that helps regulate the function of other proteins in the body. E3 ligases carry out a process known as ubiquitination, where ubiquitin is attached to a substrate protein, changing the way it functions. Ubiquitin is best known for its role in protein degradation, but has more recently been recognized as important for regulating the activity of proteins involved in cell signaling, DNA repair, anti-inflammatory, and immune responses.

There are three classes of E3 ligases, but members of the RBR type have most recently emerged as a novel and relatively untapped class of targets for drug discovery because of their role in modulating the immune system.

“We were surprised to find how the active form of the E3 ligase we analyzed, called HOIP, attaches ubiquitin in a markedly different way—an elongated fashion—compared to the other types of E3 ligases,” said Stefan Riedl, PhD, associate professor in SBP’s NCI-designated Cancer Center and senior author of the paper. “This may be key to its role in activating the NF-kB pathway, a signaling process that is well established as a regulator of cell survival and death, and helps coordinate the immune system.

“NF-kB is the master regulator of inflammation inside cells, and its activation is believed to promote cancer development by inhibiting cell death and promoting inflammation. This study removes a significant technical barrier that has prevented exploiting RBR E3 ligases as a drug target for cancer and inflammatory disorders.

“Our next step is to continue to work very closely with our biology and immunology collaborators to more fully understand the regulation of RBR E3 ligases,” added Riedl.

The study was performed in collaboration with Ruslan Sanishvili at the Argonne National Laboratory and Peter Mace at the University of Otago, New Zealand. The full text is available here.

Institute News

Lilly and Sanford-Burnham announce collaboration to investigate immunological therapies

Authorpbartosch
Date

May 14, 2015

Today, Eli Lilly and Sanford-Burnham announced a novel collaboration to discover and develop immunological therapies. The two organizations will investigate potential therapeutics using biotechnology approaches in targeting multiple immune checkpoint modulators for the treatment of immunological diseases such as lupus, Sjögren’s syndrome, inflammatory bowel disease, and other autoimmune disorders. Continue reading “Lilly and Sanford-Burnham announce collaboration to investigate immunological therapies”