Biologic Therapy and Cardiometabolic Risk in Psoriasis: A Retrospective Review.

Introduction: Psoriasis is a systemic inflammatory disease with increased cardiometabolic risk including dyslipidaemia and diabetes. Biologic therapy effectively treats the cutaneous inflammatory burden of psoriasis and evolving evidence suggests potential to reduce systemic inflammatory sequalae that can elevate cardiovascular risk. This study aimed to assess the change in cardiometabolic risk markers in a cohort of patients with psoriasis treated with 1 year of continuous biologic treatment.

Methods: A retrospective review was conducted of patients receiving biologic therapy for chronic plaque psoriasis in a single dermatology centre at a major tertiary hospital in Sydney, Australia. The effect of biologic therapy on psoriasis was assessed using the psoriasis area severity index (PASI). Cardiometabolic risk markers assessed included lipid profile (total cholesterol [TC], low-density lipoprotein [LDL] cholesterol, high-density lipoprotein [HDL] cholesterol and triglycerides [TG]) and haemoglobin A1c (HbA1c). Measurements at baseline and 1 year were compared using paired t tests for analysis of the parameters which approximated normal distribution (TC, LDL, HDL) and Wilcoxon signed-rank test for analysis of those which did not (TG, HbA1c, PASI). Two-tailed P values < 0.05 were considered significant.

Results: A total of 200 patients were reviewed, of which 39 had complete data sets. The participants' ages ranged from 21 to 85 years (mean 51, SD 16.9). Of the 39 participants, 31 (79.5%) were male, 8 (20.5%) were female; 26 (67%) were biologic experienced (BE) and 13 (33%) were biologic naïve (BN). The mean PASI at baseline (for BN + BE) was 13.4 (SD 9.8). The biologic agents used, according to frequency, included risankizumab, with 14 participants (35.9%), secukinumab by 7 (17.9%), ustekinumab by 6 (15.4%), ixekizumab by 6 (15.4%), guselkumab by 3 (7.7%), infliximab by 2 (5.1%), and adalimumab by 1 (2.6%). After 12 months, significant skin improvement was seen [PASI reduced from 13.43 (SD 9.8) to 1.1 (SD 2.1), p < 0.001]. There was no significant change in lipid profile, including TC (mean difference - 0.1 mmol/L, p = 0.532), LDL-C (mean difference = - 0.1 mmol/L, p = 0.476), HDL (mean difference = - 0.1 mmol/L, p = 0.125), triglycerides (mean difference = 0.0 mmol/l, p = 0.748) or HbA1c (mean difference 0.38%, p = 0.468).

Conclusion: Markers of cardiometabolic risk (lipid profile and HbA1c) did not significantly improve after 1 year of biologic therapy despite significant reduction in psoriasis skin severity. Further research in larger cohorts is needed to elucidate the benefits, if any, of biologic therapy on cardiometabolic parameters in individuals with psoriasis, in order to optimise care for this vulnerable cohort.