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Xu X.,Tianjin Medical University | Zhang Q.,Tianjin Central Hospital of Gynecology and Obstetrics | Tian X.,Tianjin Medical University | Wang G.,Tianjin Medical University
Fundamental and Clinical Pharmacology | Year: 2016

Sevoflurane has been found to increase apoptosis and pathologic markers associated with Alzheimer disease, provoking concern over their potential contribution to postoperative cognitive dysfunction. This study aimed to determine the effects of sevoflurane on contextual fear memory of aged rats and to characterize local population connectivity of local field potentials (LFPs) in medial prefrontal cortex (mPFC) of aged rats during contextual fear memory. Eighteen-month-old male SD rats were implanted with one multichannel electrode array in mPFC. The aged rats were divided into control group, sevoflurane group (1 MAC sevoflurane for 2 h) and surgical group with 1.0 MAC sevoflurane for 2 h. We then assessed the effect of the anesthesia on contextual fear memory, and alterations in the local population connectivity of mPFC LFP networks by partial directed coherence (PDC). Surgery impaired contextual fear memory and reduced local population connectivity of mPFC LFP networks in aged rats at day 1 after the surgery and anesthesia. 1 MAC Sevoflurane anesthesia induced neither contextual fear memory impairment nor alterations in local population connectivity of mPFC LFP networks in aged rats when tested 1, 7, 15 and 30 days after exposure (P > 0.05). PDC values of theta band mPFC LFPs became strongly increased during contextual fear memory at 1, 7, 15, and 30 days after anesthesia. Our results suggest that 1 MAC sevoflurane anesthesia does not induce contextual fear memory impairment in aged rats and suggest that the increased local population connectivity in theta bands LFPs of mPFC plays a role in contextual fear memory. © 2016 Société Française de Pharmacologie et de Thérapeutique Source


Zhang Y.,Tianjin Medical University | Hu X.-Q.,Tianjin Central Hospital of Gynecology and Obstetrics | Zhao Y.,Tianjin Medical University
Scientific Reports | Year: 2014

Studies have investigated the relationship between genetic variants and risk of gestational diabetes mellitus (GDM). However, the results remain inconclusive. The aim of this study was to investigate the association of rs10830963 and rs1387153 variants in melatonin receptor 1B (MTNR1B) and rs1801278 variant in insulin receptor substrate 1 (IRS1) with GDM susceptibility. Electronic database of PubMed, Medline, Embase, and CNKI (China National Knowledge Infrastructure) were searched for relevant studies between 2005 and 2014. The odds ratio (OR) with its 95% confidence interval (CI) were employed to estimate the association. Total ten case-control studies, including 3428 GDM cases and 4637 healthy controls, met the inclusion criteria. Our results showed a significant association between the three genetic variants and GDM risk, rs10830963 with a P-value less than 0.0001, rs1387153 with a P-value of 0.0002, and rs1801278 with a P-value of 0.001. Furthermore, all the genetic models in these three polymorphisms were associated with increased risks of GDM as well (P< = 0.009). In conclusion, our study found that the genetic polymorphisms rs10830963 and rs1387153 in MTNR1B and rs1801278 in IRS1 were associated with an increased risk of developing GDM. However, further studies with gene-gene and gene-environmental interactions should be considered. Source


Chen X.,Tianjin Medical University | Liu Y.N.,Tianjin Medical University | Zhou Q.H.,Tianjin Medical University | Leng L.,Tianjin Medical University | And 2 more authors.
Biomedical and Environmental Sciences | Year: 2013

The aim of this study was to evaluate the effects of low concentrations of DEHP and MEHP on steroidogenesis in a murine Leydig tumor cell line (MLTC-1) in vitro. The result of flow cytometry analysis revealed that the proportion of apoptotic cells was significantly increased after the exposure to DEHP. All three genes (P450scc, P450c17, and 3βHSD) under study showed an increased expression following exposure to DEHP or MEHP, although some insignificant inhibitory effects appeared in the 10 μmol/L treatment group as compared with the controls. It was also found that DEHP or MEHP stimulated INSL3 mRNA and protein especially in the 0.001 μmol/L treatment group. Testosterone secretions were stimulated after the exposure to DEHP or MEHP. Alterations of steroidogenic enzymes and INSL3 in MLTC-1 cells might be involved in the biphasic effects of DEHP/MEHP on androgen production. © 2013 The Editorial Board of Biomedical and Environmental Sciences. Source


Liu Y.,Tianjin Medical University | Liu Y.,Key Laboratory of Cancer Prevention and Therapy | Liu H.,Tianjin Central Hospital of Gynecology and Obstetrics | Bai X.,Tianjin Huanhu Hospital | And 4 more authors.
Gynecologic Oncology | Year: 2011

Objective: This study aims to determine the diagnostic value of diffusion-weighted imaging (DWI) in the differentiation of metastatic lymph nodes from non-metastatic lymph nodes in uterine cervical cancer. Methods: In 42 patients who underwent lymph node dissection for uterine cervical cancer, conventional MRI and DWI examinations were performed before surgery. Of the 1109 total dissected pelvic lymph nodes, 188 enlarged nodes with a short-axis diameter of 5 mm or greater were included for further analysis. Each of the size-based criteria (i.e., short-axis diameter and long-axis diameter) and ADC-based criteria (i.e., mean ADC, minimum ADC, mean rADC (relative ADC) and minimum rADC) were compared between metastatic lymph nodes and non-metastatic lymph nodes. Results: There were statistically significant differences between metastatic and non-metastatic lymph nodes in the short-axis diameter, long-axis diameter, mean ADC, minimum ADC, mean rADC and minimum rADC (P < 0.001). The Az of the minimum ADC (0.990) was greater than that of the other ADC-based criteria (0.974, 0.939, 0.976 for mean ADC, mean rADC and minimum rADC, respectively) and all size-based criteria (0.878 for short-axis diameter and 0.858 for long-axis diameter) (P < 0.05). Using the minimum ADC criteria (≤ 0.881 × 10- 3mm2/s), the sensitivity and specificity for differentiating metastatic from non-metastatic lymph nodes were 95.7% and 96.5%, respectively. Conclusions: DWI is feasible for differentiating metastatic from non-metastatic pelvic lymph nodes in patients with uterine cervical cancer and minimum ADC could be served as a representative marker. © 2011 Elsevier Inc. All rights reserved. Source


Shen Y.,Tianjin Central Hospital of Gynecology and Obstetrics | Wang Y.,Tianjin Central Hospital of Gynecology and Obstetrics | Shi Y.,Tianjin Central Hospital of Gynecology and Obstetrics | Liu J.,University of Houston | Liu Y.,Tianjin Central Hospital of Gynecology and Obstetrics
International Journal of Clinical and Experimental Pathology | Year: 2012

In 2006, dedifferentiated endometrioid adenocarcinoma (undifferentiated carcinoma associated with lowgrade endometrioid carcinoma) of the uterus was first proposed. Dedifferentiated endometrioid carcinoma is part of the spectrum of undifferentiated carcinoma of the endometrium which is a highly aggressive tumor even when the undifferentiated component represents only 20% of the entire neoplasm. Therefore, accurate diagnosis and appropriate classification of this neoplasm are important in patient management. Lack of the recognition may lead to misclassification of dedifferentiated endometrioid adenocarcinoma as a pure endometrioid adenocarcinoma which is less aggressive. Only 4 papers have appeared in the literature so far on the topic of dedifferentiated endometrioid carcinoma. We report herein a first case of endometrial dedifferentiated endometrioid carcinoma in a 51-year old woman in Chinese population. We performed immunoperoxidase studies for 12 markers. Among them, cytokeratins, keratin 7, keratin 18, EMA, estrogen receptor (ER), progesterone receptor (PR), and vimentin show significantly differential expression between differentiated and undifferentiated area. Source

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