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Mitochondrial autophagy plays a contributary role in the pathogenesis of retina degeneration (RD). ZYAN1 is a novel proline hydroxylase domain (PHD) inhibitor that can enhance the expression of hypoxia-inducible factor 1-alpha (HIF-1α). This study investigated whether ZYAN1 could alleviate progressive photoreceptor loss and oxidative damage in a pharmacologically induced RD model via the modulation of mitophagy. ZYAN1 was injected into the vitreous body of the RD model, and the retinal autophagy level was analyzed. The therapeutic effects of ZYAN1 were evaluated via a function examination, a morphological assay, in situ reactive oxygen species (ROS) detection, and an immunofluorescence assay. It was shown that the thickness of the outer nuclear layer (ONL) increased significantly, and visual function was efficiently preserved via ZYAN1 treatment. The mitochondria structure of photoreceptors was more complete in the ZYAN1-treated mice, and the number of autophagosomes also increased significantly. Membrane disc shedding and ROS overproduction were alleviated after ZYAN1 treatment, and the axonal cilia were more structurally intact. A Western blot analysis showed that the expression levels of the autophagy-related proteins LC3-B, Beclin-1, and ATG5 increased significantly after ZYAN1 treatment, while the expression of P62 was down-regulated. Moreover, the expression levels of HIF-1α and BNIP3 were up-regulated after ZYAN1 treatment. Therefore, an intravitreal injection of ZYAN1 can act as part of the pharmacologic strategy to modulate mitophagy and alleviate oxidative stress in RD. These findings enrich our knowledge of RD pathology and provide insights for the discovery of a therapeutic molecule.

The JAK2/STAT3 signaling pathway plays a critical role in tumorigenesis, and has been suggested as a potential molecular target for anti-melanoma therapeutics. However, few JAK2 inhibitors were being tested for melanoma therapy. In this study, eight amentoflavone analogues were evaluated for their activity against human malignant melanoma cells. The most potent analogue, compound 1, inhibited the phosphorylation of JAK2 and STAT3 in human melanoma cells, but had no discernible effect on total JAK2 and STAT3 levels. A cellular thermal shift assay was performed to identify that JAK2 is engaged by 1 in cell lysates. Moreover, compound 1 showed higher antiproliferative activity against human melanoma A375 cells compared to a panel of cancer and normal cell lines. Compound 1 also activated caspase-3 and cleaved PARP, which are markers of apoptosis, and suppressed the anti-apoptotic Bcl-2 level. Finally, compound 1 induced apoptosis in 80% of treated melanoma cells. To our knowledge, compound 1 is the first amentoflavone-based JAK2 inhibitor to be investigated for use as an anti-melanoma agent.

Objective: To evaluate the effect of control on soil-transmitted nematode infections in the demonstration plot of integrated control on parasitic diseases, Hainan Province., Methods: The plot (county) was divided into east, west, north, south and central areas and the villages in these areas were selected with the random sampling method, and then the residents in these villages were investigated with Kato-Katz technique for soil-transmitted nematode infections and with questionnaires for knowledge, attitude and practice (KAP) and so on before and after the implementation of the control measures. All the results were analyzed and compared statistically., Results: Compared with the results of the baseline survey, the overall infection rate of soil-transmitted nematode decreased by 68.66%. The infection rates of soil-transmitted nematode in the male and female decreased by 69.56% and 67.73%, respectively, and the rates in the children and adults decreased by 70.51% and 68.09%, respectively. The infection rates of Ascaris lumbricoides, Trichuris trichiura and hookworm decreased by 95.87%, 90.00% and 65.22%, respectively. The awareness rate of health knowledge increased by 115.23% and the qualified rate of health behavior increased by 51.61%., Conclusion: The remarkable results of soil-transmitted nematodiasis control have been achieved in the demonstration plot of integrated control on parasitic diseases, Hainan Province.