RSUSCI-2022 & RSUSOC-2022

IN22-044 Investigation of FOXO3a, S253 phosphorylation FoxO3a, and 14-3-3 Expression in Androgenetic alopecia VS Normal

Presenter: Juthapa Pongklaokam
Division of Dermatology, Chulabhorn International College of Medicine, Thammasat University

Abstract

The fundamental mechanism of androgenetic alopecia (AGA) is the depletion of the anagen phase causing clinical presentation of hair miniaturization. The imbalance of autophagy signaling led to a reduction of the anagen phase and an increase in senescence of dermal papilla (DP). FoxO3a, one of the upstream autophagy-regulated proteins, has been well studied in many cell types and relevant diseases. However, the function of FoxO3 and its relevant role in the autophagy mechanism becomes a mysterious phenomenon in hair regeneration and AGA. We randomly recruited multiple bulge areas of the outer root sheath from 10 tissue sections for each staining biopsied from 2 healthy volunteers and 3 early-onset androgenetic alopecia patients. Here, we aim to study FoxO3a expression by comparing early-onset AGA to normal. 5-μm formalin-fixed paraffin-embedded (FFPE) vertical sections of biopsiedscalp samples were used in immunohistochemical (IHC) assays and assessed scoring using Qu path software. The FoxO3a, S253 phosphorylated FoxO3a, and 14-3-3 were significantly identified in the bulge area of the outer root sheet of the disease group with a higher positive intensity of IHC staining in the AGA group than the normal at 12.7 %, 23.8 %, and 0.7%, respectively. Interestingly, increased phosphorylated FoxO3a and 14-3-3 protein expression in the AGA group possibly demonstrated the loss of nuclear localization that was eventually lost to transcriptional factor activities encoding autophagy-related genes. These illustrated the clinicopathological significance of early-onset AGA and the imbalance in cell signaling of the protein involved in autophagy.

Citation format:

Pongklaokam, J., Surinlert, P., & Ponikorn, S.. (2022). Investigation of FOXO3a, S253 phosphorylation FoxO3a, and 14-3-3 Expression in Androgenetic alopecia VS Normal. Proceeding in RSU International Research Conference, April 30, 2022. Pathum Thani, Thailand.