Psoriasis can look like “just plaques,” but the biology underneath is a lot bigger and a lot more hopeful than most people realize. We sit down with Dr. Naiem Issa, a board-certified dermatologist and dermatologic surgeon involved in dermatology research and drug development, to unpack what psoriasis really is: a genetically primed inflammatory disease that shows up on the skin, but also signals from within. We talk practical triggers patients actually recognize, from emotional or surgical stress to infection and skin trauma, and why the Koebner phenomenon can make injured skin a new target. We build a clear map of the immune pathway clinicians rely on when picking modern psoriasis treatments. We walk through the immune “funnel” from TNF to IL-23 and TYK2 signaling, and finally to IL-17, the key effector cytokine that helps drive rapid skin turnover, scaling, and inflammation. If you’ve ever wondered why your care team keeps mentioning cytokines, interleukins, or “biologics,” this is the plain-English framework that connects those terms to what you see in the mirror and how you feel day to day. We also get specific about IL-17 inhibitors and why “same class” doesn’t mean “same drug.” Blocking IL-17A alone, blocking IL-17A plus IL-17F, or blocking the IL-17 receptor can lead to meaningful differences in speed of clearance, durability, and what happens if you pause treatment. We discuss pharmacokinetics, withdrawal-arm trial data, time to flare, and the reassuring concept of recapturing response after restarting. We close with how we think through safety first, comorbidities like inflammatory bowel disease, joint involvement and psoriatic arthritis, injection preferences, and shared decision making. If you found this helpful, subscribe, share it with someone navigating psoriasis treatment options, and leave a review with the question you want us to tackle next. DISCLAIMER: The views and opinions expressed in the Derm-it Trotter! podcast are those of the host and guests and do not necessarily reflect the views or positions of the guests’ or host’s institution or employers. The Derm-it Trotter! Podcast is for general informational purposes only and does not constitute the practice of medicine, nursing or other professional health care services, including the giving of medical advice, and no doctor/patient relationship is formed. The use of information on this podcast or materials linked from this podcast is at the user’s own risk. The content of this podcast is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Users should not disregard or delay in obtaining medical advice for any medical condition they may have and should seek the assistance of their health care professionals for any such conditions.
