Cellular localization of immunoreactive epidermal growth factor during Wolffian duct differentiation of the fetal mouse

Previous studies from this laboratory indicated a role for epidermal growth factor (EGF) in androgen-dependent male reproductive tract differentiation of the fetal mouse. Expression of an EGF-like protein during Wolffian duct differentiation was indicated from the determinations by radioimmunoassay (RIA) and radioreceptor assay. To further characterize the protein and to assess its role in male sexual differentiation, expression of the protein has been analyzed by Western blot assay and its tissue-specific cellular expression has been determined by immunocytochemical assay in the present study. Western blot analysis of the 18-day fetal male reproductive tract detected an immunoreactive band of the predicted 6-kDa size. Immunocytochemical analysis also detected EGF-specific immunostaining in the Wolffian duct derivatives. At day 18 of gestation, the staining was localized predominantly in the epithelial nuclei of the Wolffian duct derivatives whereas at days 14 and 16 of gestation, the staining was equally distributed in the mesenchymal and epithelial sites of the Wolffian duct derivative. The intensity of the staining increased with progression of differentiation during the 14th–18th days of gestation. Prenatal exposure to the antiandrogen flutamide significantly reduced the immunostaining of the duct. Thus, a role for EGF in Wolffian duct differentiation is indicated.     

不明原因下消化道出血的血管造影及导管治疗

目的：明确下消化道出血原因及止血治疗。材料与方法：对21例不明原因下消化造出血病人行选择性血管造影，并经导管灌注垂体后叶素、明胶海绵条栓塞。结果：血管造影诊断阳性率为76％，16例病人治疗后均止血。结论：血管造影是诊断不明原因下消化道出血的首选方法，垂体后叶素灌注短期（1周）止血效果显著，但易复发，栓塞治疗更重要的在于确定病变部位以利手术。     

The influence of epidural administration of fentanyl infusion on gastric emptying in labour

The effect of epidural infusions containing fentanyl on maternal gastric emptying in labour was examined using the rate of paracetamol absorption. Women were randomly allocated to receive one of two epidural infusions, bupivacaine 0.125% alone or bupivacaine 0.0625% with fentanyl 2.5 μgml⁻¹ at a rate of 10–12 mlh⁻¹. Paracetamol 1.5 g was given orally to women after either 30 ml of the infusion solution had been given (mean time 2.5 h, study A) or 40–50 ml (mean time 4.5 h, study B). Six venous blood samples were taken over the next 90 min for measurement of plasma paracetamol concentration. There were no significant differences in maximum plasma paracetamol concentration, time to maximum paracetamol concentration and area under the concentration–time curve between the two groups for study A. In study B the time to maximum plasma paracetamol concentration was significantly delayed in women receiving > 100 μg fentanyl compared with controls (p < 0.05). We conclude that the dose of fentanyl that may delay gastric emptying when given by epidural infusion is greater than 100 μg.     

Sclerosed liver hemangioma mimicking malignant tumor at MR imaging: Pathologic correlation

This case report illustrates atypical magnetic resonance (MR) imaging findings in a liver hemangioma mimicking a malignant lesion—lower signal intensity than cerebrospinal fluid on T2-weighted spin-echo images and lack of early enhancement on dynamic contrast material—enhanced gradient-echo images. Pathologic analysis demonstrated nearly total replacement of the vascular cavities by dense fibrous tissue. In this rare, sclerosed form, this lesion could not be defined as a hemangioma with MR imaging.     

Adhesins of uropathogenic bacteria: Properties,identification and use for new antibacterial strategies

Adherence is a major virulence factor in the complex pathogenesis of urinary tract infections (UTI). Colonization of the urinary tract and subsequent spread of infection ascending to the kidneys depends not only on the expression of adhesins by bacteria but also on the presence of host factors which may either contribute to or inhibit infection. The presence of certain types of adhesins expressed by the bacteria and their interactions with epithelial cells play a role in determining where bacteria localize in the urinary tract, the kind and severity of symptoms and how the disease progresses. The knowledge of the molecular mechanisms underlying adherence may be useful for epidemiological research in the pathogenesis of UTI, for the diagnosis of different types of UTI and, in some cases, for prognosis. Furthermore, attachment to epithelia is a promising target for developing new methods in prophylaxis and therapy.     

磁共振尿路成像对泌尿系疾病的诊断价值

目的评价磁共振尿路成像(Magneticresonanceurography,MRU)对泌尿系疾病的诊断价值。方法对36例泌尿系疾病患者进行MRU检查,并结合临床手术、病理资料和其他影像学资料进行回顾性分析。结果36例患者中,均有MRU阳性结果,3例肾盂、肾盏癌,4例前列腺癌,8例前列腺增生症,2例输尿管癌定性、定位明确;9例肾盂、输尿管移行段梗阻定位明确,定性有帮助;10例输尿管下段梗阻中6例诊断明确,4例未能确诊。结论MRU在泌尿系疾病的诊断中,对肿瘤的定位、定性参考价值较高,对尿路梗阻定位诊断有价值,对定性诊断帮助有其局限性。     

少数民族女大学生性与避孕行为调查

目的:了解少数民族女大学生性与避孕行为状况。方法:在武汉地区,对各大学的少数民族女大学生进行了抽样调查。结果:调查了286名少数民族女大学生,其性行为率为14.68%,不同专业和不同年级的女大学生性行为率有统计学差异。女大学生性行为的原因以一时感情冲动、好奇、为了加强与男友的关系、生理需要为主,还有迫于暴力等原因。性伴侣以自己的男朋友为主(占95.23%以上),但也有一般熟人和一夜情对象;另有多性伴现象存在。发生性行为者中,初次性行为有42.85%未采取任何避孕措施;在近1年内有性行为者中,有54.54%的人每次性行为都采取了避孕措施。在性行为者中,有23.81%的学生怀孕,另有19.05%的学生患生殖系统炎症或性病。结论:少数民族女大学生中的性行为发生率较高,她们中存在性滥、怀孕和性传播疾病等问题。     

Response of lower esophageal contractility to changing concentrations of halothane or isoflurane: A multicenter study

A multiple-center study was performed to determine the relationship between lower esophageal contractility, clinical signs, and anesthetic concentration as expressed by minimum alveolar concentration (MAC). One hundred four American Society of Anesthesiologists Class I through III patients were exposed to isoflurane (with and without nitrous oxide) or halothane in concentrations of 0.5, 1.0, and 1.5 MAC. Heart rate and systolic blood pressure were continuously monitored. Both the amplitude and frequency of spontaneous and provoked lower esophageal contractions were measured in situ by using a 24-F probe equipped with provoking and measuring balloons. Combined results demonstrated statistically significant correlations (P<0.001) between lower esophageal contractility and MAC. Spontaneous lower esophageal contractions decreased from 1.10±0.12 (SEM) contractions per minute (0.5 MAC) to 0.42±0.05 (1 MAC) to 0.18±0.05 (1.5 MAC). Provoked lower esophageal contractility values decreased from 45±4 mm Hg (0.5 MAC) to 29±3 (1 MAC) to 19±2 (1.5 MAC). Heart rate changes did not correlate with MAC, and systolic blood pressure correlated in only one of three centers. Intracenter and intercenter analyses failed to demonstrate a significant relationship between lower esophageal contractility and heart rate or systolic blood pressure. No intracenter differences in either amplitude or frequency of lower esophageal contractions were observed, despite differences in volatile agents, induction techniques and agents, patient populations, and duration of anesthesia. Our studies indicate that lower esophageal contractility may be an indicator of anesthetic depth as reflected by MAC, but further studies are needed to quantify the effects of surgical stimulus, intravenous anesthetics, vasodilators, anticholinergics, calcium channel blockers, beta-adrenergic agonists, and the presence of a nasogastric tube.     

泌尿生殖道炎症患者沙眼衣原体感染的临床研究

目的　探讨在泌尿生殖道有炎症表现的情况下沙眼衣原体 (CT)感染的状况。方法　采用C -C快速法。结果　CT在泌尿生殖道炎症时的阳性率显著高于无炎症表现者 (P <0 .0 5) ;男性在有无炎症表现情况下的CT阳性率差异有显著性 (P <0 .0 5) ,而女性差异无显著性 (P >0 .0 5) ;2 1～ 50岁为高发年龄段。结论　CT感染症状隐匿 ,临床无症状者也应注意CT的检测 ,尤其是女性和高危人群。     

Increased carbon monoxide levels in the nasal airways of subjects with a history of seasonal allergic rhinitis and in patients with upper respiratory tract infection

BACKGROUND: Carbon monoxide (CO) has emerged as an endogenously produced gaseous mediator known to be involved in bronchial smooth muscle regulation. Increased amounts of CO have been found in exhaled air during asthma and lower airway inflammation. Recently CO has been shown to be produced in the nasal airways, but there are no reports of altered CO levels in nasal airways during inflammation. OBJECTIVE: This study was designed to investigate if CO levels increase in the human nasal airways during inflammatory conditions, such as allergy and upper airway respiratory tract infection (URTI). METHODS: CO was sampled separately from the upper and lower airways of 13 healthy control subjects, six patients with a history of allergic rhinitis and six patients with URTI. RESULTS: Nasal CO levels were increased in subjects with allergic rhinitis, compared to healthy controls (2.07 +/- 0.15 ppm, n = 6 and 1.62 +/- 0.08 ppm, n = 13, respectively, P < 0.01). CO levels were also increased in patients with URTI, compared to the same controls (1.92 +/- 0.09 ppm, n = 6, P < 0.05). Normal levels of CO were found in air from the lower airways among subjects with allergic rhinitis, whereas corresponding levels in the URTI patients were increased. CONCLUSION: The present data demonstrates that upper airway CO levels increase in parallel with different inflammatory stimuli, such as allergy and infection, suggesting a role for CO as marker or mediator of nasal inflammation.