What is the role of Anti-Smith (Anti-SM) and Anti-Jo-1 antibodies in psoriasis?

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Last updated: March 18, 2025View editorial policy

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From the Research

Anti-Smith (Anti-SM) and Anti-Jo-1 antibodies do not play a significant role in the treatment or diagnosis of psoriasis, as the current evidence does not support their involvement in the disease process. The most recent and highest quality study, a network meta-analysis published in 2022 1, compared the efficacy and safety of various treatments for moderate-to-severe psoriasis, but did not mention Anti-SM or Anti-Jo-1 antibodies.

Key Points:

  • Psoriasis is a chronic inflammatory disease with a strong genetic component, and its treatment depends on the severity of the disease.
  • Biologic medications, such as tumor necrosis factor (TNF) inhibitors, interleukin-12 (IL-12) inhibitors, interleukin-23 (IL-23) inhibitors, and interleukin-17 (IL-17) inhibitors, are effective treatments for moderate to severe psoriasis.
  • The most effective treatments for achieving PASI 90 in people with moderate-to-severe psoriasis are biologics such as infliximab, bimekizumab, ixekizumab, and risankizumab, according to the 2022 network meta-analysis 1.
  • Switching biologic agents can significantly improve outcomes for patients who fail to respond well to their first biologic agent, as discussed in a 2018 review 2.

Treatment Options:

  • Topical medications, such as corticosteroids and vitamin D analogs, are commonly used for mild to moderate psoriasis.
  • Phototherapy and non-biologic systemic medications, such as methotrexate and ciclosporin, are also used for moderate to severe psoriasis.
  • Biologic medications, such as TNF inhibitors, IL-12 inhibitors, IL-23 inhibitors, and IL-17 inhibitors, are effective treatments for moderate to severe psoriasis, as shown in the 2022 network meta-analysis 1.

Monitoring and Precautions:

  • Patients should undergo screening for tuberculosis and other infections before starting biologic medications.
  • Regular monitoring during treatment is essential, and biologic medications should be used with caution in patients with certain conditions, such as heart failure, multiple sclerosis, or a history of cancer.

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

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