Bis (2-butoxyethyl) Phthalate Delays Puberty Onset by Increasing Oxidative Stress and Apoptosis in Leydig Cells in Rats / 生物医学与环境科学（英文）

OBJECTIVE@#This study investigated the effects of bis (2-butoxyethyl) phthalate (BBOP) on the onset of male puberty by affecting Leydig cell development in rats.@*METHODS@#Thirty 35-day-old male Sprague-Dawley rats were randomly allocated to five groups mg/kg bw per day that were gavaged for 21 days with BBOP at 0, 10, 100, 250, or 500 mg/kg bw per day. The hormone profiles; Leydig cell morphological metrics; mRNA and protein levels; oxidative stress; and AKT, mTOR, ERK1/2, and GSK3β pathways were assessed.@*RESULTS@#BBOP at 250 and/or 500 mg/kg bw per day decreased serum testosterone, luteinizing hormone, and follicle-stimulating hormone levels mg/kg bw per day (P < 0.05). BBOP at 500 mg/kg bw per day decreased Leydig cell number mg/kg bw per day and downregulated Cyp11a1, Insl3, Hsd11b1, and Dhh in the testes, and Lhb and Fshb mRNAs in the pituitary gland (P < 0.05). The malondialdehyde content in the testis significantly increased, while Sod1 and Sod2 mRNAs were markedly down-regulated, by BBOP treatment at 250-500 mg/kg bw per day (P < 0.05). Furthermore, BBOP at 500 mg/kg bw per day decreased AKT1/AKT2, mTOR, and ERK1/2 phosphorylation, and GSK3β and SIRT1 levels mg/kg bw per day (P < 0.05). Finally, BBOP at 100 or 500 μmol/L induced ROS and apoptosis in Leydig cells after 24 h of treatment in vitro (P < 0.05).@*CONCLUSION@#BBOP delays puberty onset by increasing oxidative stress and apoptosis in Leydig cells in rats.@*UNLABELLED@#The graphical abstract is available on the website www.besjournal.com.

Inhibitory effect of matrine on proliferation of human ovary malignant teratoma cell line PA-1 in vitro / 中国中西医结合杂志

<p><b>OBJECTIVE</b>To study the effect of matrine (MAT) on the proliferation of human ovary malignant teratoma cell line PA-1 in vitro.</p><p><b>METHODS</b>PA-1 cells allocated in different groups were treated with different concentrations (0.25 mg/mL, 0.5 mg/mL and 1.0 mg/mL) of MAT. The inhibitory effect of MAT and its dose- and time-effect relationship were detected with MTT; the apoptosis rate and cell cycle were evaluated by flow cytometry; and the changes of bcl-2/bax mRNA expression in cells were measured using semi-quantitative RT-PCR.</p><p><b>RESULTS</b>After being exposed to MAT, the PA-1 cell proliferation was decreased in a concentration- and time-dependent manner; cell apoptosis rate raised as the increasing concentration of MAT and acting time; cells retarded at G1 phase in the cell cycle dose-dependently; and the bcl-2/bax mRNA expression in cells dawn-regulated significantly.</p><p><b>CONCLUSION</b>MAT can dose- and time-dependently inhibit the proliferation of PA-1 cell by reducing bcl-2/bax mRNA ratio to produce a G1 phase arresting in cell cycle.</p>

Effect of Safflor injection on the intestine ultrastructure characteristics following intestine ischemia/reperfusion injury in rabbits / 中国应用生理学杂志

<p><b>AIM</b>To explore effects of Safflor (Chinese Tradional Medicine) on the intestine ultrastructure characteristics during intestine ischemia/ reperfusion injury (I/RI) in rabbits.</p><p><b>METHODS</b>Thirty rabbits were randomly divided into three groups: control group (group S), ischemia/reperfusion group (group I/R) and Safflor injection group (group SI). Morphological changes of intestine ischemia/reperfusion in rabbits and the protective effects of Safflor were observed under electric telescope.</p><p><b>RESULTS</b>The intestine ultrastructure was badly injured in group I/R. Mitochondria and intestinal mucosal cells were swellen and endoplasmic reticulum expanded, however, in the SI group the ultrastructural injury of the ischemia greatly ameliorated.</p><p><b>CONCLUSION</b>The ultrastructure injury occurrted after intestine I/RI and Safflor has protective effects on the intestine ultrastructure.</p>

Morphological Alteration of Testis after Intra-Abdominal Dissection of Spermatic Vessel in Rats in Prepuberty / 实用儿科临床杂志

Objective To investigate the effects of high spermatic vessel dissection on testicular morphological alteration of SD rats in prepuberty,puberty and sexual maturity phases.Methods Thirty-day-old SD rats were divided into 2 groups underwent sham operation and left high spermatic vessel dissection as a simulation of Palomo′s maneuver.Detailed morphological investigations were made at 3 different postoperative intervals among the 3rd day,30th day and 56th day.Results High spermatic vessel dissection in prepubertal rats induced acute testicular ischemia in the operated testes on the 3rd day.Most of the operated testes on the 30th day showed testicular atrophy.And all the operated testes showed testicular atrophy and sperm disappearance in epididymis on the 56th day.Conclusion High dissection of spermatic vessel in prepubertal rats induced testicular ischemia in prepuberty and testicular growth failure in puberty,testicular atrophy completely and sperm production losing in sexual maturity phase.