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Author Interviews, Gastrointestinal Disease, Hepatitis - Liver Disease / 13.05.2025

MedicalResearch.com discussion with: Dr. Bertus Eksteen PhD, MBChB, FRCP Founder of the Calgary PSC Clinic Member of the Calgary Liver Unit and the Southern Alberta Liver Transplant Clinic Aspen Woods Clinic Calgary, Canada Primary sclerosing cholangitis (PSC) is a liver disease characterized by progressive inflammation and scarring of the bile ducts. PSC still has no known cause or cure and often leads to liver failure or cancer. For patients and clinicians, the lack of answers is deeply frustrating. But that's beginning to change. Thanks to genetic research, we’re uncovering clues about PSC’s origins—and why it behaves differently from patient to patient. By learning more about the genomic underpinnings of PSC, researchers can create new treatment targets, devise risk profiles for early diagnosis, and even develop better clinical tools for detecting the disease in its earliest stages.  And that path forward doesn’t just start with new treatments — it begins in the lab.

Genetic Clues to PSC Onset

PSC isn't directly inherited, but genetics likely play a significant role in determining who develops the disease. Several immune-related gene variations, particularly those related to the human leukocyte antigen (HLA) complex, have increased the risks of developing PSC.  These variations don’t cause PSC on their own— researchers believe they interact with intestinal bacteria and other environmental factors, prompting the immune system to launch an attack on the bile ducts. Understanding these genetic foundations provides a roadmap for following this disease very early. Instead of reacting to symptoms, we can start asking why specific people are predisposed in the first place. That insight is key to prevention and long-term disease management. (more…)
Author Interviews, Gastrointestinal Disease, Hepatitis - Liver Disease, Weight Research / 07.05.2025

MedicalResearch.com Interview with: Dr. Katilyn Gernhard DO Internal Medicine Resident Allegheny Health Network Pittsburgh MedicalResearch.com: What is the background for this study? Response: The background for this study is the steadily rising prevalence of obesity in the United States, which has been accompanied by an increase in related comorbid conditions, including Metabolic Dysfunction–Associated Steatotic Liver Disease (MASLD). Bariatric surgery and GLP-1 receptor agonists are two commonly used treatment options to address obesity and its associated complications. While both have demonstrated benefits in weight loss and metabolic improvement, there has been limited direct comparison of their effectiveness specifically in patients with MASLD. Our study aimed to address this gap by comparing clinical outcomes in patients with MASLD treated with GLP-1 receptor agonists versus those treated with bariatric surgery. (more…)
Author Interviews, Hepatitis - Liver Disease, JAMA, Statins / 07.07.2023

MedicalResearch.com Interview with: Carolin Victoria Schneider, MD Physician-Scientist at RWTH Aachen Former Postdoctoral Fellow at UPenn, Rader Lab MedicalResearch.com: What is the background for this study? Response: Our study was prompted by the ongoing global health crisis related to liver disease, which claims over 2 million lives annually. We noted the emerging literature suggesting the hepatoprotective properties of statins, which include anti-inflammatory, antiproliferative, antiangiogenic, and immunomodulatory effects. However, we noticed a significant gap in understanding these effects in the context of the general population, especially among individuals without a history of known liver disease. Together with our excellent first author Mara Vell, I embarked on a journey aimed to fill this significant knowledge gap. (more…)
Author Interviews, Dermatology / 05.04.2021

MedicalResearch.com Interview with: Wolfgang Liedtke, M.D., Ph.D. Professor (tenured) of Neurology, Anesthesiology and Neurobiology
Attending Physician, Duke Neurology Clinics for Headache, Head-Pain and Trigeminal Sensory Disorders
Attending Physician, Duke Clinics for Innovative Pain Therapy at Brier Creek (Dept of Anesthesiology)
Duke University School of Medicine, Center for Translational Neuroscience
Durham NC 27710 Since April 2021 Chair of Neurology Global Development Scientific Council Regeneron Pharmaceuticals Tarrytown NY 10591 MedicalResearch.com: What is the background for this study? Response: There are systemic diseases that are characterized by intense itching, yet without inflammation of the skin and not associated with allergic inflammation. For example and importantly, liver disease with non-functional secretion of bile (cholestatic liver disease, most common primary biliary cholangitis, an autoimmune disease), but also chronic end-stage renal disease (also certain lymphomas and pruritic psoriasis where the itch is whole-body, not only restricted to diseased skin). We thought that these diseases might be great starting points to better understand itch because there is no inflamed skin and no allergies. Thus, there must be some systemic factor that causes itch, and we were intent on discovering such factors, and with them, molecular mechanisms how they cause itch. For cholestatic liver disease, one of the best candidates to fit this profile has been lysophosphatidic acid (LPA), since the pioneering discoveries of Andreas Kremer, one of our co-authors. My research laboratory at Duke has been rooted in my discovery of TRPV4 ion channels 20 years ago, out of the Friedman Lab at The Rockefeller University in NYC. Over the years, with my colleague Yong Chen out of my lab, now leading his own independent research operation, we focused on the role of TRPV4 ion channels in skin. 5 years ago Yong and I published a paper that provided some evidence for TRPV4 in skin perhaps playing a role in itch. Working with phospholipids, we made the serendipitous discovery that lysophosphatidyl choline (LPC) is a more potent itch-inducing lipid molecule than LPA. Of note, LPC is the metabolic precursor of LPA. We then found that LPA does not depend on TRPV4 to elicit itch. The more robust itch evoked by LPC was significantly reduced when we knocked down TRPV4 in skin keratinocytes. Itch was NOT affected when TRPV4 was deleted from sensory nerve cells that innervate the skin. In terms of background, my long-term goal has been to elucidate how innervating peripheral nerve cell and innervated organ, such as skin, talk to one another so that the sensation that is felt is regulated or modulated, e.g how can skin influence itch or pain, how can joint cells influence pain. That became the exciting bedrock of our study, and we took it from there, 5 years of hard work with collaborations spanning the globe, and a final stretch of exhausting work during the pandemic. (more…)