快速杂交法定量检测HBV DNA及临床应用

目的：介绍一种快速定量检测HBV DNA的方法及临床初步应用。方法：对40例乙型肝炎病毒表面抗原阳性的慢性乙型肝炎患者共79份血清标本，采用Digene第二代杂交捕获试验(Hybrid Capture Ⅱ,HCⅡ,v2.0)定量检测HBV DNA，并与分枝链DNA信号扩增试验(bDNA，v1.0)作比较。结果：79份HBsAg阳性血清中，HCⅡ检出HBV DNA57份(72．2％)，bDNA法为45份(57％)，HCⅡ敏感性略高于bDNA法；2种方法定量检测HBV DNA的符合率为85.9％，相关性良好(r＝0．95)；19例抗病毒治疗乙肝患者，治疗后平均HBV DNA载量下降2(Log10)数量级，6例发生e抗原血清转换的患者平均HBV DNA载量下降3(Log10)数量级以上，且HBV DNA阴转早于e抗原血清转换。结论：HCⅡ比bDNA更为简便、经济、快速，可用于临床HBV DNA水平的定量检测、监控及抗病毒药物的筛选、考核。     

Inhibitory action of quercetin on intestinal transit in mice

The effects of quercetin have been investigated on the gastrointestinal propulsion of charcoal meal in mice. Quercetin reduced the rate of intestinal transit and this effect was potentiated by verapamil.     

Peptidergic neurons in the snail Helix pomatia: Distribution of neurons in the central and peripheral nervous systems that react with an Antibody raised to the insect neuropeptide,leucokinin I

In this study, antiserum raised against an insect myotropic peptide, leucokinin I (DPAFNSWGamide), was: used for mapping leucokinin-like immunoreactive (LK-LI) neurons in the gastropod mollusc, Helix pomatia. Immunocytochemistry performed on both whole-mounts and cryostat sections demonstrated LK-LI neurons in all ganglia of the central nervous system (CNS), except the visceral ganglion. Altogether about 700 immunolabelled neurons have been found, with nearly one-half (46%) in the cerebral ganglia. A large proportion of the LK-LI neurons have small cell bodies and are likely to be interneurons. The most prominent LK-LI cell group is represented by the entire neuron population of the mesocerebri, which is the major source of a thick fiber bundle system, encircling and innervating the whole CNS. One single LK-LI giant neuron was found, which is located in the left pedal ganglion and is termed GLPdLKC (giant left pedal leucokinin immunoreactive cell). This cell has not been identified previously. The ganglion neuropils are heavily innervated by varicose LK-LI fiber arborizations. Some integrative centers, such as the medullary neuropil of the procerebri, reveal an extreme density of LK-LI innervation. All major peripheral nerves contain a large number of LK-LI axons, and LK-LI innervation is found in the musculature of different peripheral organs (buccal mass, lip, tentacles, oviduct, intestine). Among the peripheral organs investigated, the intestine contains a rich varicose LK-LI network, composed of both intrinsic and extrinsic elements. Radioimmunoassay (RIA) demonstrates a very high content of LK-LI material in Helix ganglion extracts (about 50 pmol/CNS). This is the first report on the occurrence of a substance resembling the myotropic neuropeptide leucokinin I in a phylum outside arthropods. Based on our immunocytochemical observations, a role for leucokinin-like peptides in both central and peripheral regulatory processes in Helix is suggested. According to double-labelling experiments, only a small number of the LK-LI neurons are labelled with an antibody to the vertebrate tachykinin substance P.     

Myoclonic encephalopathy in the CDKL5 gene mutation.

OBJECTIVE: Epilepsy with mutation of the CDKL5 gene causes early seizures and is a variant of Rett syndrome (MIM (312750), which is reported typically as infantile spasms. The purpose of this study was to analyze the epileptic histories and EEGs of patients with the CDKL5 mutation. METHODS: We reviewed the epilepsy histories and electroclinical analyses of three girls aged 9.5, 7.4, and 9.4 years, each with a mutation of the CDKL5 gene. RESULTS: We revealed the presence of an encephalopathy that started by 1.5 months of age. At first, seizures involved tonic spasms or complex partial seizures, and were complicated by the later appearance of complex partial, tonic, and unexpectedly, myoclonic seizures. This form of epilepsy was drug resistant. Routine and prolonged video EEGs both displayed a homogeneous electroclinical pattern consisting of (a) unique background with diffuse high voltage sharp waves of 6-7 Hz, and absence of the typical rhythmic frontal-central theta activity present in Rett syndrome; (b) unique awake and sleep background, with diffuse, high voltage, continuous sharp waves with multifocal and diffuse spikes; (c) rhythmic, diffuse, 15 Hz activity accompanied clinically by tonic seizures; (d) intercritical pattern with pseudoperiodic, diffuse, sharp waves or pseudoperiodic, diffuse spike and polyspike or wave discharges; and (e) diffuse, spike, polyspike and wave discharges accompanied by massive or focal myoclonias or both. CONCLUSIONS: Patients with the CDKL5 mutation have an early onset, epileptic encephalopathy in infancy that evolves into myoclonic seizures in childhood with a unique EEG pattern. SIGNIFICANCE: Recognizing this type of encephalopathy could be useful in prompting clinicians to proceed further with their diagnostic work in patients not fitting the criteria of classical Rett syndrome.     

Lack of effects of a lyposterolic extract of Serenoa repens on plasma levels of testosterone, follicle-stimulating hormone, and luteinizing hormone

Twenty men, aged 50 to 75 years (mean, 67 years), suffering from benign prostatic hypertrophy received 160 mg of a lyposterolic extract of Serenoa repens, twice daily for 30 days. Before and at the end of treatment, plasma levels of testosterone, follicle-stimulating hormone, and luteinizing hormone were determined. No changes in plasma hormone levels occurred as a result of treatment. It is concluded that Serenoa extract, which is useful in the treatment of benign prostatic hypertrophy, does not act via systemic changes of hormone levels.     

新的质粒介导的碳青霉烯酶IMI-3传播机制研究

目的明确新的质粒介导的碳青霉烯酶IMI-3传播机制.方法采用E试验测定抗菌药物MIC,接合试验、酶切克隆筛选及鸟枪法测序对编码基因IMI-3传播机制进行研究.结果发现阳性克隆菌E.coli pT103有5个开放读码框（ORF）.在编码基因IMI-3的两侧各有一相同的插入序列,氨基酸序列与IS903有71%的同源性.鸟枪法测序显示IMI-3与染色体介导的IMI-有99%的同源性.结论IMI-3编码基因是由位于染色体上的IMI-1经点突变通过转座酶Tn903转移至可接合性质粒上.     

Successful surgical correction of persistent truncus arteriosus by an aortic homograft]

After palliative procedure a 2 years old girl with congenital heart disease was corrected with aortic homograft. Truncus arteriosus is a rare congenital heart disease and this is the first successfully corrected case in our country. Using homograft in this age group improves the early and late result of this type of corrective surgery.