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A Role for Plasmacytoid Dendritic Cells in Lupus

Jack Cush, MD

Plasmacytoid dendritic cells (pDCs) have been strongly implicated in the pathogenesis of lupus, as their primary product, type I interferon, drive systemic lupus erythematosus and cutaneous lupus erythematosus. A recent comprehensive review synthesizes the available data on pDCs, and, importantly, what we still don't know.

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Infectious Rheumatology (5.15.2026)

Jack Cush, MD

Dr. Jack Cush discusses his favorite journal articles from the past week on RheumNow.com.

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Toll-Like Receptor Drugs Effective in Cutaneous Lupus

MedPage Today

Enpatoran, an investigational oral drug that inhibits Toll-like receptors (TLR) 7 and 8, was superior to placebo in relieving lupus skin manifestations in a dose-finding phase II trial.

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Review of GLP-1 Receptor Agonists in Psoriasis

Jack Cush, MD

Glucagon-like peptide-1 receptor agonists (GLP-1 RAs) have transformed cardiometabolic medicine and are now attracting intense interest in inflammatory disorders.

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Litifilimab in Cutaneous Lupus Erythematosus

Jack Cush, MD

Biogen has announced positive results of their Phase 2 study, evaluating litifilimab in patients with active cutaneous lupus erythematosus (CLE), presented at the recent American Academy of Dermatology (AAD) Annual Meeting.

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Top Four and More (4.10.2026)

Jack Cush, MD

Dr. Jack Cush reviews the news and journal reports from RheumNow.com this week - including his top four favorite subjects.

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Malignancies Not Increased with Biologic Therapies

Jack Cush, MD

The risk of malignancy in rheumatoid arthritis (RA) patients receiving biologic agents was evaluated by metanalysis of randomized controlled trials (RCTs) and found no significant increased risk of malignancy compared with other disease-modifying antirheumatic drugs (DMARDs) or with placebo.

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JAMA Guideline on the Management of Crohn Disease

Jack Cush, MD

JAMA has published a current Clinical Guidelines Synopsis on the Management of Crohn Disease (CD) in Adults.

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Predictors of Calcinosis Cutis in Systemic Sclerosis

Jack Cush, MD

Calcinosis cutis (CaC) is a common and disabling non-lethal manifestations in systemic sclerosis (SSc). This study used SSc patients from the EUSTAR database to clinically characterize patients and identify risk factors for CaC development.

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Update on Multicentric Reticulohistiocytosis Have you ever seen multicentric reticulohistiocytosis (MRH)? Don't worry, it's a rare non-Langerhans cell histiocytosis condition characterized by papulonodular skin lesions and symmetric erosive polyarthritis, and it has only been https://t.co/koXOwktDgA
Dr. John Cush RheumNow ( View Tweet)
Parvovirus B19 Infection - Images from JAMA Dermatology. 40yoM 2-days asymptomatic rash w/ fever to 39°C, w/ arthralgias, Rash on BL cheeks, inguinal, flanks, axilla. WBC =2K, CRP 1.24 mg/dl. Dx by PCR for parvovirus B19 DNA https://t.co/LGGnabvFvA https://t.co/XzPlaWkIfz

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Dr. John Cush RheumNow ( View Tweet)
Toll-Like Receptor Drugs Effective in Cutaneous Lupus Enpatoran, an investigational oral drug that inhibits Toll-like receptors (TLR) 7 and 8, was superior to placebo in relieving lupus skin manifestations in a dose-finding phase II trial. https://t.co/R1wbJHXwjD https://t.co/65HtG0Te94

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Dr. John Cush RheumNow ( View Tweet)
Parvovirus B19 Infection - Images from JAMA Dermatology. 40yoM 2-days asymptomatic rash w/ fever to 39°C, w/ arthralgias, Rash on BL cheeks, inguinal, flanks, axilla. WBC =2K, CRP 1.24 mg/dl. Dx by PCR for parvovirus B19 DNA https://t.co/LGGnabvFvA https://t.co/yyBF9pEGls

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Dr. John Cush RheumNow ( View Tweet)
By @RheumattDoc #Psoriasis and nail changes #PsA #PsoriaticArthritis #enthesitis #dactylitis https://t.co/rxH2zrGBwC

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Dr Gurdeep S Dulay gurdeep_dulay ( View Tweet)
DERM on RheumNow PODCAST (April 2026) The Derm on RheumNow podcast is a collection of Citations and Content curated for dermatologists – addressing Psoriasis, PsA, CLE, vasculitis, HS, other CTD skin disorders. dermatology drugs, biologics, JAKs - their use, efficacy and side https://t.co/SlCGA364gj
Dr. John Cush RheumNow ( View Tweet)
Review of GLP-1 Receptor Agonists in Psoriasis Psoriasis is a chronic immune-mediated inflammatory disease plaqued by systemic comorbidities that increase morbidity, mortality, and treatment complexity. Obesity is a significant contributor to psoriatic disease. https://t.co/R1Uutdjcvz
Dr. John Cush RheumNow ( View Tweet)
Sun Pharma buys out Organon w/ $11.75 billion buyout. Both generated $6.2 billion in 2025 sales. Organon spun off from ‌Merck in 2021, specializes in women’s health and is top 7 in biosimilars. Sun is into dermatology, ophthalmology and oncology-dermatology. https://t.co/zb4hucTqCJ
Dr. John Cush RheumNow ( View Tweet)
Litifilimab in Cutaneous Lupus Erythematosus Biogen has announced positive results of their Phase 2 study, evaluating litifilimab in patients with active cutaneous lupus erythematosus (CLE), presented at the recent American Academy of Dermatology (AAD) Annual Meeting. https://t.co/3Wb6iFViOm
Dr. John Cush RheumNow ( View Tweet)
Predictors of Calcinosis Cutis in Systemic Sclerosis Calcinosis cutis (CaC) is a common and disabling non-lethal manifestation in systemic sclerosis (SSc). This study used SSc patients from the EUSTAR database to clinically characterize patients and identify risk factors for https://t.co/uXbcCa04Lv
Dr. John Cush RheumNow ( View Tweet)
Itch is common in Scleroderma (SSc) and not related to Dz duration. Study of 2173 Pts (~20K itch assessments), 87 F; mean age 55 yrs; 40% w/ diffuse SSc. Itch (moderate 4/10) seen in ~35% at all times https://t.co/QnT8d0xA5Z https://t.co/yEgB6ImDTi

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Dr. John Cush RheumNow ( View Tweet)
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