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Role of FoxO1 in Acne and Effect of Isotretinoin on FoxO1 Expression.
BACKGROUND: Nodulocystic acne is a severe type of acne that is known to improve after treatment with isotretinoin. Melnik has hypothesized a unifying concept on the mechanism of acne pathogenesis involving altered expression of Forkhead box O transcription factor ( FoxO1 ) and role of isotretinoin in improving acne via modulating this pathway.
AIM: To evaluate the pathway proposed by Melnik in acne pathogenesis by analysing the difference in the expression of FoxO1 , peroxisome proliferator-activated receptor ( PPARγ ), and androgen receptor (AR) between acne patients and non-acne controls and the effect of treatment with isotretinoin on change in expression of these genes in acne patients.
RESULTS: The gene expression of FoxO1 was non significantly higher in acne patients as compared to controls. After treatment with isotretinoin, a significant decrease in FoxO1 expression in acne patients at mRNA ( P = 0.05) level was observed. There was a significant decrease in grade 3 positivity of FoxO1 at protein level ( P = 0.0009). A decrease in androgen receptor positivity ( P = 0.055) at protein level was also observed.
CONCLUSION: Reduction in FoxO1 expression appears to be an important mechanism of action of isotretinoin in acne.
AIM: To evaluate the pathway proposed by Melnik in acne pathogenesis by analysing the difference in the expression of FoxO1 , peroxisome proliferator-activated receptor ( PPARγ ), and androgen receptor (AR) between acne patients and non-acne controls and the effect of treatment with isotretinoin on change in expression of these genes in acne patients.
RESULTS: The gene expression of FoxO1 was non significantly higher in acne patients as compared to controls. After treatment with isotretinoin, a significant decrease in FoxO1 expression in acne patients at mRNA ( P = 0.05) level was observed. There was a significant decrease in grade 3 positivity of FoxO1 at protein level ( P = 0.0009). A decrease in androgen receptor positivity ( P = 0.055) at protein level was also observed.
CONCLUSION: Reduction in FoxO1 expression appears to be an important mechanism of action of isotretinoin in acne.
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