Rho/Rock信号转导通路中的关键因子RhoA、Rock Ⅰ、p-LMC在后发性白内障动物模型中的表达

目的 建立SD大鼠后囊膜混浊(posterior capsular opacification,PCO)动物模型,检测Rho/Rock通路中的关键因子RhoA、Rho激酶Ⅰ(Rho associated coiledcoil forming protein kinase-Ⅰ,Rock Ⅰ)和肌球蛋白轻链(phosphorylated myosin light chain,p-MLC)在PCO中的表达.探讨Rho/Rock通路在PCO形成过程中的作用.方法 选用健康SD大鼠30只,随机分为对照组(0d)和实验组(3d、7d、14 d、28 d),每个时间点各6只.所有大鼠(右眼)均行晶状体囊外摘出术,显微镜下观察不同时间点术眼前节的炎症反应及PCO发生情况.ELISA法检测不同时间点房水中TGF-β的表达.处死大鼠后摘除眼球行组织病理学检查,免疫组织化学和Western Blot法检测RhoA、Rock Ⅰ、p-MLC在晶状体后囊上的表达.结果 随着术后观察时间的推移,PCO混浊程度逐渐增加,HE染色显示晶状体上皮细胞不同程度的增生、移行.对照组术后0d、3d、7d、14 d、28 d房水中TGF-β的表达量分别为(37.28±1.31)μg·L-1、(40.29±3.17) μg·L-1、(42.12±3.45) μg·L-1、(60.42±4.75) μg·L-1、(68.69±8.06)μg·L-1,实验组各时间点与对照组相比,差异有统计学意义(F=137.158,P＜0.05);不同时间点两两相比,差异均有统计学意义(均为P＜0.05).术后0d、3d、7d、14 d和28 d晶状体后囊膜上RhoA蛋白相对表达量(RhoA/GAPDH)分别为1.00±0.00、1.49±0.01、1.57±0.03、1.77±0.02和1.97±0.02,实验组各时间点与对照组相比,差异有统计学意义(F=94.546,P＜0.05);不同时间点两两相比,差异均有统计学意义(均为P＜0.05).Rock Ⅰ蛋白的表达量(Rock Ⅰ/GAPDH)分别为1.00±0.00、0.35±0.12、1.42 ±0.14、1.78±0.09和1.95±0.14,实验组各时间点与对照组相比,差异有统计学意义(F=30.942,P＜0.05);不同时间点两两相比,差异均有统计学意义(均为P＜0.05).p-MLC蛋白的相对表达量(p-MLC/GAPDH)分别为1.00±0.00、1.44±0.08、1.47±0.13、1.63±0.10和2.12±0.20,实验组各时间点与对照组相比,差异有统计学意义(F =34.313,P＜0.05);不同时间点两两相比,差异均有统计学意义(均为P＜0.05).结论 RhoA、Rock Ⅰ、p-MLC在PCO形成过程中表达逐渐增多,Rho/Rock信号转导通路可能与PCO的发生、发展有关.     

榄香烯乳联合洛铂腹腔热灌注治疗中晚期结直肠癌恶性腹水的临床研究

目的 探讨榄香烯乳联合化疗药物洛铂腹腔热灌注对中晚期恶性结直肠癌腹水的临床疗效.方法 对2017年1月至2019年12月,广州医科大学附属肿瘤医院诊断为中晚期大肠癌并伴恶性腹水的患者共40例,按照入组条件,遵循抛硬币法分为治疗组(20例),对照组(20例),对照组予单药洛铂(50 mg),治疗组予洛铂(50 mg)加中...     

蒙药砂蓝刺头定性与定量质量控制方法研究

目的建立砂蓝刺头Echinops gmelini的质量控制方法。方法采用薄层色谱法,以三氯甲烷-醋酸乙酯-甲醇-甲酸(6∶1∶1∶0.8)为展开剂对砂蓝刺头花中1-甲基-4-甲氧基-8-(β-D-葡萄吡喃型糖苷)-2(1H)-喹啉酮(MMQ)进行定性鉴别;建立砂蓝刺头HPLC指纹图谱,并对MMQ的含量测定方法进行研究。结果建立的TLC方法对照品斑点清晰,分离度好;建立的指纹图谱分析方法能够区分砂蓝刺头与近源植物,标定了8个特征峰,并指认出其中4个成分。定量方法测定结果显示MMQ在2.024~151.800μg/mL呈良好线性关系,平均加样回收率为101.54%,RSD为1.46%。7批样品中MMQ的质量分数为0.13%~0.53%。结论建立的质量控制方法科学、可靠,可为砂蓝刺头质量标准的建立提供实验依据。     

Response of proopiomelanocortin and gonado- or lactotroph systems to in-vitro fertilisation procedures stress

Objective

To analyse for the first time the response of the corticotroph-type and the melanotroph-type pituitary proopiomelanocortin (POMC) system with regard to in-vitro fertilisation (IVF) treatment using self-developed highly specific non-cross-reacting radioimmunoassay.

Study design

Setting: University hospital. Patients: A total of 28 patients undergoing IVF oocyte retrieval. Cross sectional exploratory study, one factorial design with repeated measurements on one factor, non-parametric tests. Blood was collected before anaesthesia (t_A) (n = 28) and immediately after oocyte retrieval (t_B) (n = 28). Main outcome measure(s): β-endorphin immunoreactive material (IRM), acetyl-N-β-endorphin IRM, β-lipotropin IRM, ACTH, cortisol, estradiol, progesterone, prolactin, luteinizing hormone, and follicle-stimulating hormone. For determination of authentic β-endorphin [β-endorphin (1–31)] a highly specific two-site fluid phase immunoprecipitation radioimmunoassay was developed, which did not cross-react with any β-endorphin derivative or any other opioid peptide tested.

Results

No response of acetyl-N-β-endorphin IRM and of authentic β-endorphin (1–31) was observed to oocyte retrieval in contrast to a significant increase of corticotroph-type proopiomelanocortin derivatives. A significant rise in prolactin plasma concentration indicates a pronounced lactotroph response to oocyte retrieval stress. No significant correlation between POMC derivates and prolactin and between POMC derivatives and gonadotropins or sexual steroids except for ACTH and progesterone and for β-endorphin IRM and estradiol was observed.

Conclusion

IVF treatment stress led to significant corticotroph-type POMC and lactotroph responses, but not to responses of authentic β-endorphin or melanotroph-type POMC in women undergoing oocyte retrieval.     

ATDC蛋白在卵巢癌组织中的表达及其与β-catenin蛋白的关系

目的:通过分析ATDC蛋白在卵巢癌组织中的表达及其与β-catenin蛋白的关系,探讨ATDC蛋白及β-catenin蛋白在卵巢癌发生发展中的作用.方法:应用免疫组化SP法检测ATDC蛋白及β-catenin蛋白在卵巢癌、卵巢良性肿瘤及正常卵巢组织中的表达,分析ATDC蛋白及β-catenin蛋白与卵巢癌各种临床病理参...     

ER-β基因多态性与子宫内膜癌组织ER表达的相关性

目的:研究ER-β基因多态性与子宫内膜癌组织ER阳性表达的相关性。方法:选择60例子宫内膜癌患者和60例健康对照者,检测两组ER-β基因RsaI和AluI酶切多态性,检测子宫内膜癌组ER阳性表达率。结果:ER-β基因RsaI多态性在EC组和对照组间差异有统计学意义(P<0.05),R等位基因患EC的风险是r等位基因的1.796倍(OR=1.796,95%CI:1.070～3.017);EC组RR基因型癌组织ER阳性表达明显少于Rr、rr基因型(P<0.05)。AluI多态性在EC组和对照组间无统计学差异(P>0.05)。结论:ER-β基因RsaI酶切多态性与子宫内膜癌的发病有相关性,R等位基因可能是EC的遗传易感基因,RR基因型与癌组织ER阳性低表达具有关联性。     

血清超敏C反应蛋白与尿碘水平联合预测先兆流产患者保胎结局的研究

目的观察血清超敏C反应蛋白(hs-CRP)与尿碘水平联合对先兆流产患者保胎结局的预测效能。方法前瞻性选取海南医学院第二附属医院2018年1月至2020年1月收治的112例先兆流产患者作为研究对象,根据保胎结局将患者分为保胎失败组(n=20)与保胎成功组(n=92)。检测两组入院时各主要指标[甲状腺功能相关指标、血清孕酮(P)、β-人绒毛膜促性腺激素(β-HCG)、hs-CRP、尿碘水平],采用Logistic回归分析各主要指标与先兆流产患者保胎结局的关系,并分析入院时血清hs-CRP、尿碘水平对先兆流产患者保胎结局的预测效能。结果保胎失败组P、β-HCG水平低于保胎成功组,hs-CRP水平高于保胎成功组,合并甲状腺功能异常、尿碘水平异常占比高于保胎成功组(P<0.05)。经Logistic回归分析结果显示,先兆流产患者甲状腺功能异常、hs-CRP表达上调、尿碘水平异常是保胎成功的危险因素(OR>1,P<0.05);先兆流产患者P、β-HCG表达上调是保胎成功的保护因素(OR<1,P<0.05);绘制受试者工作特征(ROC)曲线发现,先兆流产患者hs-CRP...     

Early and late diagnoses of 17β-Hydroxysteroid dehydrogenase type-3 deficiency in two unrelated patients

17β-hydroxysteroid dehydrogenase type 3 deficiency is a rare cause of 46 XY disorders of sexual development. Mutations in the HSD17B3 gene result in reduced activity of the 17β-HSD3 enzyme, decreasing the conversion of androstenedione to testosterone. In this report, two cases, admitted with different clinical findings in the neonatal and adolescent periods and were decided to be raised in different genders are presented. The first case who had complete female external genitalia presented on the third postnatal day with the complaint of swelling in the groin. He was decided to be raised as a male and was treated successfully with parenteral testosterone in order to increase phallus size before surgical correction of the external genitalia. The second case was an adolescent girl who presented due to pubertal virilisation and primary amenorrhoea and chose female gender. Molecular genetic analyses of the HSD17B3 gene revealed two different previously reported homozygous variants. We emphasise that patients with 17β-hydroxysteroid dehydrogenase type 3 deficiency can present with heterogeneous clinical findings in different age groups. Early diagnosis is important to prevent future gender confusion and related problems.     

血清中β-HCG、孕酮、癌抗原125及子宫内膜厚度在早期异位妊娠诊断中的价值

目的 比较早期异位妊娠和正常宫内孕妇女血清中β-人绒毛膜促性腺激素(β-HCG)、孕酮、癌抗原125的含量及子宫内膜厚度,来评价其在早期异位妊娠诊断中的应用价值.方法 选取确诊为异位妊娠患者95例,作为异位妊娠组;正常宫内孕妇女102例,作为对照组;2组对象均知情同意,并且既往无习惯性流产史,无放射线及化学物质接触史,无家族性遗传性疾病史.收集2组对象的基本资料,包括年龄、性别、身高、体重、孕次等信息.采用化学发光法测定实验组和对照组血清中β-HCG、孕酮、癌抗原125含量,采用探头频率为3.5 ～5 MHz的彩超检测实验组和对照组子宫内膜厚度.结果 异位妊娠组血清中β-HCG、孕酮、癌抗原125水平分别为(254.85±945.65) mIU/ml、(18.69±3.03) mmol/L、(49.26±7.08) kU/L,显著低于正常宫内孕组的(9215.23±2125.26) mIU/ml、(37.57±5.24) mmol/L、(118.53±26.90) kU/L;异位妊娠组子宫内膜厚度为(7.85±1.34)mm,低于正常宫内孕组的(13.23±2.46) mm.结论 妊娠妇女血清中β-HCG、孕酮、癌抗原125及子宫内膜厚度在用于诊断异位妊娠时具有重要的参考价值,但它们的灵敏度和差异度有一定的差异,因此,在临床诊断时可以综合各检测指标应用.