AI helps researchers design microneedle patches that restore hair in balding mice

AI helps researchers design microneedle patches that restore hair in balding mice
Hair regrew thicker in mice treated with a manganese-nanozyme microneedle patch (right-side image, labeled MnMNP) compared to those treated with testosterone as a control (left-side image). Credit: Nano Letters (2022). DOI: 10.1021/acs.nanolett.2c03119

Hair loss is undesirable for many men—and women—because one's hairstyle is often closely tied to their self-confidence. And while some people embrace it, others wish they could regrow their lost strands. Now, researchers reporting in Nano Letters have used artificial intelligence (AI) to predict compounds that could neutralize baldness-causing reactive oxygen species in the scalp. Using the best candidate, they constructed a proof-of-concept microneedle patch and effectively regenerated hair on mice.

Most people with substantial hair loss have the condition androgenic alopecia, also called male- or female-pattern baldness. In this condition, hair follicles can be damaged by androgens, inflammation or an overabundance of , such as oxygen free radicals.

When the levels of oxygen free radicals are too high, they can overwhelm the body's antioxidant enzymes that typically keep them in check. Superoxide dismutase (SOD) is one of these enzymes, and researchers have recently created SOD mimics called "nanozymes." But so far, those that have been reported aren't very good at removing oxygen . So, Lina Wang, Zhiling Zhu and colleagues wanted to see whether , a form of AI, could help them design a better nanozyme for treating .

The researchers chose transition-metal thiophosphate compounds as potential nanozyme candidates. They tested with 91 different transition-metal, phosphate and sulfate combinations, and the techniques predicted that MnPS3 would have the most powerful SOD-like ability.

Next, MnPS3 nanosheets were synthesized through chemical vapor transport of manganese, red phosphorus and sulfur powders. In initial tests with human skin fibroblast cells, the nanosheets significantly reduced the levels of reactive oxygen species without causing harm.

Based on these results, the team prepared MnPS3 microneedle patches and treated androgenic alopecia-affected mouse models with them. Within 13 days, the animals regenerated thicker hair strands that more densely covered their previously bald backsides than mice treated with testosterone or minoxidil. The researchers say that their study both produced a nanozyme treatment for regenerating hair, and indicated the potential for computer-based methods for use in the design of future nanozyme therapeutics.

More information: Chaohui Zhang et al, Machine Learning Guided Discovery of Superoxide Dismutase Nanozymes for Androgenetic Alopecia, Nano Letters (2022). DOI: 10.1021/acs.nanolett.2c03119

Journal information: Nano Letters

Citation: AI helps researchers design microneedle patches that restore hair in balding mice (2022, October 31) retrieved 5 February 2023 from
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