Value of P16 expression in the triage of liquid-based cervical cytology with atypical squamous cells of undetermined significance and low-grade squamous intraepithelial lesions / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>The management of atypical squamous cells of undetermined significance/low-grade squamous intraepithelial lesions (ASCUS/LSIL) is still controversial and it is advisable to make a triage for these two cytological abnormalities. P16(INK4) (P16) has been shown to be a potential biomarker for predicting high-grade cervical intraepithelial neoplasia (CIN) and cervical cancer. The aim of the study was to determine the value of P16 expression by immunostaining method compared with high-risk human papillomavirus (HR-HPV) DNA test in the triage of ASCUS/LSIL women.</p><p><b>METHODS</b>Totally 86 eligible residual liquid-based cytological specimens with ASCUS and 45 with LSIL were obtained. All specimens were submitted to HR-HPV DNA test (HC2) and P16 immunocytochemical staining simultaneously. And all women underwent colposcopy and biopsy after cytology.</p><p><b>RESULTS</b>The positive rate of P16 staining was 32.6% in ASCUS and 42.2% in LSIL, which was significantly lower than that of HR-HPV test in both ASCUS (P < 0.05) and LSIL (P < 0.05). Moreover, the positive rate of P16 staining was 12.7% in normal histology, 61.5% in CIN 1, 87.0% in CIN 2-3, and 100.0% in cancer, in which P16 positive rate was significantly lower than HR-HPV positive rate in normal group. The sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV) and accuracy of P16 staining for predicting CIN 2 or more were 87.5%, 68.6%, 38.9%, 96.0%, and 72.1%, respectively in the ASCUS; while 90.0%, 71.4%, 47.4%, 96.2% and 54.7%, respectively in the LSIL, in which the specificity and accuracy of P16 staining were significantly higher than those of HR-HPV test in both ASCUS and LSIL (P < 0.05).</p><p><b>CONCLUSION</b>P16 immunostaining had significantly higher specificity and accuracy than HR-HPV DNA test for predicting for high-grade CIN and cervical cancer in ASCUS and LSIL and can be used for the triage of women with ASCUS/LSIL cytological abnormality.</p>

Comparison of midazolam and propofol as conscious sedation in oocyte retrieval of IVE-ET / 浙江大学学报·医学版

<p><b>OBJECTIVE</b>To compare the efficacy and safety of midazolam combined with fentanyl and propofol combined with fentanyl as conscious sedation in oocyte retrieval of in vitro fertilization and embryo transplantation (IVF-ET).</p><p><b>METHODS</b>Eighty patients receiving IVE-ET were randomly divided into midazolam combined with fentanyl group (midazolam group) and propofol combined with fentanyl group (propofol group). Antalgic effects, circulation status (blood pressure, heart rate), respiration status (rate, oxygen saturation and respiration depression) during operation, nausea and vomiting, and amnestic effects after operation were compared.</p><p><b>RESULT</b>No differences of antalgic effects and circulation status between two groups were observed. Percentages of respiration depression,vomiting and amnesia of midazolam group were 5.0 %, 10.0 % and 25%, respectively, and those of propofol group were 25%, 27.5% and 7.5%, respectively, which had statistical significance.</p><p><b>CONCLUSION</b>As conscious sedation, midazolam combined with fentanyl is better than propofol combined with fentanyl in oocyte retrieval of IVF-ET.</p>

Effects of endogenous histamine on memory impairment induced by pentylenetetrazole-kindled epilepsy in rats / 浙江大学学报·医学版

<p><b>OBJECTIVE</b>To investigate the mechanisms of memory impairment induced by pentylenetetrazole (PTZ)-kindled epilepsy in rats and the effects of endogenous histamine.</p><p><b>METHODS</b>Rats were injected i. p with a subconvulsive dose of PTZ every 48 h until fully kindled. Memory was tested by shuttle box with passive avoidance. Brain histamine was measured spectrofluorometrically. Neurons of hippocampus were investigated with HE stain.</p><p><b>RESULT</b>PTZ-kindled epilepsy caused memory impairment in rats, i .e. latency of passive avoidance was shortened in shuttle box. Pretreatment of histidine, the precursor of histamine, showed an ameliorating effect on memory impairment induced by epilepsy. Decreased histamine contents in the hippocampus, thalamus and hypothalamus were observed after fully kindled in rat. In addition, intact neurons of the CA1 and CA3 regions in hippocampus decreased to 72.7 % and 78.9 % compared with those in control group.</p><p><b>CONCLUSION</b>PTZ-kindled epilepsy causes memory impairment, and it might be due to a decrease of brain histamine and loss of hippocampal neurons induced by epilepsy.</p>