In eukaryotic cells,heat shock factor 1 is the main specific transcription factor mediating the enhanced expression of heat shock proteins when cells experience stresses.It is kept in a latent state by inhibitory complexes under unstressed conditions.It is only transiently activated in response to diverse forms stresses.Dominant-positive heat shock factor 1 has been developed through deletion-mutation.It can activate the expression of endogenous heat shock proteins in the absence of stresses.Environmental neurotoxins play an important role in the pathogenesis of Parkinson's disease.The neurotoxins induce cell death of dopamine neurons through oxidative damage.The results of Western blot and dual-luciferase analysis indicate that the expression of HSP70 was greatly up-regulated in dopaminergic SH-SY5Y cells transfected with dominant-positive heat shock factor 1.To investigate the effect of dominant-positive heat shock factor 1 on 6-OHDA-induced apoptosis in dopaminergic SH-SY5Y cells,the release of lactate dehydrogenase was detected.The result argues that dominant-positive heat shock factor 1 significantly inhibits neurotoxin 6-OHDA-induced cell death in SH-SY5Y cells.The cyto-protective role may be attributed to HSP70 activated by dominant-positive heat shock factor 1.Taken together,it is possible that dominant-positive heat shock factor 1 can be used to prevent or cure Parkinson's disease.

Objective:To evaluate the efficacy of gold microneedle combined with tranexamic acid transdermal administration for the treatment of post-inflammatory hyperpigmentation caused by acne vulgaris.Methods:From January 2022 to October 2022, 36 patients with post-inflammatory hyperpigmentation of facial acne who went to the Laser Medical Center, Air Force Medical Center were treated, including 10 males and 26 females, with 21-42 (28.3±4.8) years of age. The patients were divided into observation group and control group, with 18 cases in each group. The observation group was treated with gold microneedle combined with transdermal administration of tranexamic acid, the control group with 0.5 mm microneedles combined with transdermal administration of tranexamic acid. Both groups were treated for 2 times with an interval of 2 months. The total effective rate, post acne hyperpigmentation index (PAHPI), UV spots, brown spots, pores, skin texture, and adverse reaction were evaluated at 4 weeks after the last treatment.Results:Clinical observation was completed in all 36 patients. In the observation group, 17 cases were effective, accounting for 94.4%, and in the control group, 11 cases were effective, accounting for 61.1%, The curative effect of the observation group was better than that of the control group, and the difference between the two groups was statistically significant ( P<0.05). The differences in PAHPI score, UV spots, brown spots, pores, and skin texture between the two groups were also statistically significant ( t=3.10, 2.52, 2.71, 2.43 and 3.54; P=0.004, 0.017, 0.001, 0.021 and 0.001). The patiens in both groups had different degrees of burning sensation, erythema, edema. dryness and other symptoms after treatment, which were relieved 3 days after treatment without special treatmet. Conclusions:Gold microneedle plus transdermal administrationof tranexamic acid is a safe and effective method for the treatment of post-inflammatory pigmentation caused by acne vulgaris.