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The pathogenesis of psoriasis is thought to be linked to the adaptive immune system, and traditional treatments for psoriasis have focused on reducing the skin inflammation caused by immune hyperactivation. The ‘gut-skin axis’ is a theory that the health of the gut is linked to skin homeostasis and improving the gut microbiome can change immune responses. Therefore, it is theorized that using probiotics could improve the symptoms of psoriasis.
Here, we summarize a systematic review and meta-analysis by Wei et al.1 published in the Journal of Cosmetic Dermatology on the efficacy of probiotics in patients with psoriasis.
Table 1. Trial characteristics*
Trial |
Interventions |
Probiotic strain |
Duration (months) |
|
---|---|---|---|---|
Probiotic |
Control |
|||
1. Suriano, et al., 2023.2 |
Standard of care plus probiotics |
Standard of care plus placebo |
Lactobacillus rhamnosus |
6 |
2. Moludi, et al., 2021.3 |
Probiotic (n = 25) |
Maltodextrin capsule (n = 25) |
Lactobacillus acidophilus, Bifidobacterium bifidum, Bifidobacterium lactis, and Bifidobacterium langum |
2 |
3. Akbarzadeh, et al., 2022.4 |
Synbiotic product and |
Hydrocortisone and placebo (n = 25) |
Lactobacillus strains, Bifido-bacteria strains, Streptococcus thermophilus, plus fructo-oligosaccharides |
3 |
4. Gilli, et al., 2023.5 |
Probiotic (n = 18) |
Placebo (n = 17) |
Lactobacillus acidophilus, Bifidobacterium bifidum, Bifidobacterium lactis, and Bifidobacterium langum |
2 |
5. Moludi, et al., 2022.6 |
Probiotic (n = 23) |
Placebo (n = 23) |
Lactobacillus rhamnosus |
2 |
*Data from Wei, et al.1 |
Figure 1. The mean difference in A PASI and B DLQI between the test and control groups in each trial*
DLQI, Dermatology Life Quality Index; PASI, Psoriasis Area and Severity Index.
*Adapted from Wei, et al.1
Key learnings |
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