Vitamin D can ameliorate premature ovarian failure by inhibiting neutrophil extracellular traps: A review.

The etiology of premature ovarian failure (POF) is mainly related to inflammatory diseases, autoimmune diseases, and tumor radiotherapy and chemotherapy; however, its specific pathogenesis has not been clarified. Vitamin D (VD), a fat-soluble vitamin, is an essential steroid hormone in the human body. Neutrophil extracellular traps (NETs) are meshwork structures that are formed when neutrophils are stimulated by inflammation and other factors and are closely associated with autoimmune and inflammatory diseases. Notably, VD inhibits NET formation and intervenes in the development of POF in terms of inflammatory and immune responses, oxidative stress, and tissue fibrosis. Therefore, this study aimed to theorize the relationship between NETs, VD, and POF and provide new ideas and targets for the pathogenesis and clinical treatment of POF.

Mechanisms of Dendrobium officinale polysaccharides in repairing gastric mucosal injuries based on mitogen-activated protein kinases (MAPK) signaling pathway.

The present study aimed to investigate the protective effects and molecular mechanisms of Dendrobium officinale polysaccharides on gastric mucosal injuries. Following one week of continuous intragastric administration, a gastric mucosal injury model was established using intragastric administration of anhydrous ethanol. The area of gastric ulcer was measured, the contents of interleukin- 6 (IL-6), epidermal growth factor receptor (EGFR), and thyroid transcription factor 1 (TFF-1) in serum were detected by enzyme linked immunosorbent assay (ELISA), and the expressions of EGFR, TFF-1, IL-6, Raf-2, MAP kinase kinase 1 (MEK1), MEK2, and ERK1 in the gastric tissue were determined utilizing qPCR, Western blotting and immunohistochemistry. Simultaneously, Dendrobium officinale polysaccharides and anhydrous ethanol were added to the gastric mucosal cells (GES1) cultured in vitro, and the protective effects of Dendrobium officinale polysaccharides on cell viability was detected using Cell Counting Kit (CCK)-8. The addition of Dendrobium officinale polysaccharides markedly improved the gastric epithelial defect, inflammatory cell infiltration, and redness and swelling stemmed from gastric mucosal injuries and greatly reduced the area of gastric ulcer. The inhibition rates of gastric ulcer were 48.12 ± 2.98, 42.95 ± 1.52, and 27.96 ± 2.05% in the high, medium, and low concentration Dendrobium officinale polysaccharide groups, respectively. Dendrobium officinale polysaccharides could increase the expressions of EGFR and TFF-1 and decrease the expressions of IL-6, Raf-2, MEK1, MEK2, and ERK1. Dendrobium officinale polysaccharides could reduce the level of inflammatory factors and protect gastric mucosa by inhibiting the expression of MAPK pathway genes and proteins.

Effect of Pressure Stresses on Cell Viability and Protein Expression of Fascial Fibroblast.

BACKGROUND: Many physical and mechanical phenomena occur during the acupuncture and tuina regime, and pressure is one of the most basic mechanical phenomena. OBJECTIVES: To understand the cellular bio-physical mechanism of basic mechanical stimulation via acupuncture and tuina by investigating the effect of different in vitro pressures on the cell viability and protein expression differences that originate from the facial fibroblasts around the meridians. MATERIALS AND METHODS: In vitro culture of the facial fibroblasts around the meridians was conducted using different pressures to perform single and multiple stimulation(s) on the cells. Thus, the changes in the fibroblast cell viability (cell viability rate and diameter) were tested, and changes in the fibroblast protein expression were observed. RESULTS: We found that the pressure stimulation may excite the fascial fibroblast viability at the acupoint and increase cell viability. Two interactive factors are involved: the pressure intensity and the number of pressure stimulations. In addition, we found that all three pressures lead to significant regulation effects on the protein expression of the meridian-related fascial tissue fibroblasts, and clustering analysis revealed that 100 kPa pressure stimulation exhibits the most evident effect on the protein expression which is the pressure inducing the most differentiated protein expression. CONCLUSIONS: During the in vitro pressure process, the difference in the cell viability rate and protein expression of the facial fibroblasts around the meridians may (from a cell mechanics' point-of-view) reveal the cytobiological and therapeutic mechanism of the basic mechanical stimulation via acupuncture and tuina on the facial fibroblasts around the meridians.

[Analysis of alcohol extract and water extract of Polygonum capitatum by UPLC-Q-TOF-MS].

In this study, we used Ultra Performance Liquid Chromatography-Time-of-Flight Mass Spectrometry(UPLC-TOF-MS)to identify the chemical constituents in both ethanol and water extract of Polygonum capitatum. A Waters ACQUITY UPLC BEH C18 column(2.1 mm×100 mm,1.7 µm) was used for separation. The mobile phase was consisted of(A) 0.10% formic acid in water and(B)0.10% formic acid in acetonitrile, and the flow rate was 0.35 mL•min⁻¹. ESI source in negative ion mode was used for MS detection. Structural identification was carried out according to the accurate mass and matching with database. The results showed that flavonoids, polyphenols and lignans were the main components in both extracts. However, the chemical compositions of both extracts were different, e.g. there are less hydrolyzable tannins, loss of ellagic acid and more anthocyanins in ethanol extract. In a conclusion, this study provides an important scientific basis for identifying the active ingredients in P. capitatum, which also help to reveal the pharmacological effect of P. capitatum.