A possible new treatment for Lupus by modulating the microbiome

 Sweet potatoes are a natural rich source of Vitamin A.

Sweet potatoes are a natural rich source of Vitamin A.

Editors Note:  It would be of immense help to the AMI if we could learn more about our readership.  Please, if you are reading this, take less than 1 minute to fill out the short form and subscribe to our website.  This is a different form than the blog subscription.  We would be very grateful if everyone reading this filled out the form.  Link to form.

Lupus is a well-known autoimmune disease that causes inflammation in several organs and can sometimes be fatal.  Its cause is still unknown, but it has recently been implicated with the microbiome, and we have written about it before on this blog.  New research out of Virginia Tech has provided further evidence of this link by showing specific microbiome differences between control and Lupus affected mice.  They also showed that Vitamin A may help improve the the Lupus mice’s conditions.

The researchers tested two groups of mice, one a healthy control group and the other that had a genetic mutation that causes Lupus-like symptoms.  When they studied the microbiomes of these mice they discovered that the Lupus mice had a significant reduction in Lactobacillaceae and increase in Lachnospiraceae.  The researchers then connected the severity of lupus symptoms directly with the levels of these two bacteria (worse symptoms with higher Lachnospiraceae abundance and lower Lactobacillaceae abundance).  Interestingly, Lupus affects almost 10 times more females than males.  These researchers showed that while there was little difference between genders in the control group microbiomes, there was a much higher diversity in the microbiomes of female Lupus mice as compared to male Lupus mice. 

Vitamin A has been shown in humans to relieve the symptoms of Lupus, so the researchers fed the Lupus mice both retinol (pure vitamin A), as well retinoic acid (a metabolite of vitamin A).  While the retinol did not seem to help the Lupus mice, the retinoic acid restored populations of Lactobacillaceae, and relieved symptoms in the Lupus mice.

We know that mice are not a perfect model for humans, but this research shows that the microbiome may be an important factor in Lupus.  As such, it also shows a potential prebiotic, retinoic acid, for the treatment of Lupus.  Lupus is a complex disease, and we do not expect it to be completely understood through the lens of the microbiome, but research like this is important in elucidating possible connections between the two.

Editors note: Remember, please take a moment to fill out this form. Link to form.

Please email blog@MicrobiomeInstitute.org for any comments, news, or ideas for new blog posts.

The views expressed in the blog are solely those of the author of the blog and not necessarily the American Microbiome Institute or any of our scientists, sponsors, donors, or affiliates.