Abstract:
OBJECTIVE:To evaluate the effects of nitric oxide inhibitor on prostacyclin (PGI2) biosynthesis and the role of PGI2 in hyperhemodynamics of portal hypertension. METHODS:Sprague Dawley rats were divided into four groups: intrahepatic portal hypertension (IHPH) by injection of CCl4, prehepatic portal hypertension (PHPH) by stenosis of the portal vein, end-to-side portacaval shunt (PCS), and sham-operated controls (SO). Animals of each group were subdivided into 2 groups: systemic administration of nitric oxide inhibitor L-NMMA and vehicle. The radioactive microsphere method was used for hemodynamic study. The level of plasma PGI2 (6-keto-PGF1 alpha) was measured by radioimmunoassay. RESULTS:The characteristics of hyperdynamic circulatory state including increased cardiac output and splanchnic blood flow, decreased mean arterial blood pressure, total peripheral vascular resistance, and splanchnic vascular resistance were observed in IHPH, PHPH and PCS rats. The magnitude of hyperhemodynamics was in the order of PCS > PHPH > IHPH rats. The hyperdynamic circulatory state in IHPH, PHPH and PCS rats could be effectively reversed by L-NMMA to the baseline values of hemodynamics in SO rats. The baseline concentrations of plasma 6-keto-PGF1 alpha (ng/ml) in PHPH, IHPH, PCS, and SO rats were 6.93 +/- 2.43, 5.09 +/- 2.27, 2.36 +/- 1.01 and 1.56 +/- 0.61, respectively. The concentrations of plasma 6-Keto-PGF1 alpha in PHPH, IHPH and PCS rats were significantly higher than those in SO rats. Moreover, the concentrations were significantly higher in PHPH and IHPH rats than in PCS rats (P < 0.05). After administration of L-NMMA, the concentrations of plasma 6-Keto-PGF1 alpha (ng/ml) in PHPH, IHPH, PCS and SO rats were 7.69 +/- 2.98, 5.68 +/- 2.66, 5.50 +/- 0.79, 5.02 +/- 2.86, respectively. As compared to the baseline value, the concentrations of 6-keto-PGF1 alpha rats were slightly increased in IHPH, PHPH rats (P > 0.05), but significantly increased in PCS and SO rats (P < 0.05). CONCLUSIONS:In this study, the hyperdynamic circulatory state in portal hypertensive rats and portacaval shunt rats was completely reversed by L-NNMA to normal, but the level of 6-keto-PGF1 alpha was still elevated. The results indicate that PGI2 is not involved in hyperhemodynamics of portal hypertension.
journal_name
Chin Med J (Engl)journal_title
Chinese medical journalauthors
Cao H,Wu Z,Zhou J,Chen Z,Kuang Ykeywords:
subject
Has Abstractpub_date
1999-06-01 00:00:00pages
516-9issue
6eissn
0366-6999issn
2542-5641journal_volume
112pub_type
杂志文章abstract:OBJECTIVE:To investigate the relationship between the presence of the TNF2 allele and plasma concentrations of tumor necrosis factor-alpha (TNF alpha) and soluble TNF receptor (sTNF-R) with the development of acute severe pancreatitis (ASP) and severe sepsis. METHODS:Genomic DNA was prepared from peripheral blood leuk...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2003-11-01 00:00:00
abstract:BACKGROUND:Cross-sectional area (CSA) for small pulmonary vessels is considered a parameter of pulmonary vessel alterations in patients with chronic obstructive pulmonary disease. This study was to evaluate the correlation of CSA with airflow obstruction parameters in asthma. Furthermore, we aimed to measure the differ...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:10.1097/CM9.0000000000000367
更新日期:2019-08-20 00:00:00
abstract:BACKGROUND:Knowledge about factors influencing the prognosis of resective epilepsy surgery can be used to identify which patients are most suitable for surgical treatment. The aim of this study was to identify preoperative prognostic factors associated with the chance of achieving long-term seizure freedom. METHODS:We...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2011-12-01 00:00:00
abstract:OBJECTIVE:To investigate the relationship between vascular endothelial growth factor C (VEGF-C) expression, VEGFR-3 expression, lymphangiogenesis and angiogenesis in human non-small cell lung cancer (NSCLC). METHODS:Seventy-six NSCLC samples were stained for VEGF-C, VEGFR-3 and CD34 with immunohistochemical methods. A...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2003-05-01 00:00:00
abstract:BACKGROUND:The acute abdomen remains a challenge for all obstetricians and physicians who take part in the care of women in pregnancy. To add substantially to our understanding of acute pancreatitis (AP) in pregnancy, in particular affirming the increased risks for mother and fetus associated with AP, we explored featu...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2011-09-01 00:00:00
abstract:BACKGROUND:Gastric intestinal metaplasia (GIM) is generally considered to be the main mucosal background for the development of gastric adenocarcinomas. Using linked color imaging (LCI), we noticed that the color pattern in areas of GIM was purple mixed with white on the epithelium with signs of mist that were detected...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:10.1097/CM9.0000000000000172
更新日期:2019-04-05 00:00:00
abstract::Four calcium channel blockers, i.e. nifedipine, verapamil, cinnarizine and tetrandrine are currently available and used widely in treating cardiovascular diseases. To confirm the effects, if any, of calcium channel blockers on cirrhotic patients with portal hypertension, a study was performed on esophageal variceal pr...
journal_title:Chinese medical journal
pub_type: 临床试验,杂志文章,随机对照试验
doi:
更新日期:1995-11-01 00:00:00
abstract:BACKGROUND:Beta(2)-adrenoceptor (beta(2)AR) desensitization is a common problem in clinical practice. beta(2)AR desensitization proceeds by at least such three mechanisms as heterologous desensitization, homologous desensitization and a kind of agonist-induced rapid phosphorylation by a variety of serine/threonine kina...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2008-02-20 00:00:00
abstract:OBJECTIVE:To test the hypothesis that in a rat model of acute intestinal ischemia/reperfusion injury, endotoxemia from the gastrointestinal tract would play a role in mediating tumor necrosis factor (TNF) response and remote organ dysfunction. METHODS:Wistar rats underwent 45 minutes of superior mesenteric artery occl...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:1998-06-01 00:00:00
abstract::The environment structure of natural nidi and epidemic areas of hemorrhagic fever with renal syndrome (HFRS) possesses characteristics of topography, hydrology, climate, soil, vegetation, and animals. The natural nidi and epidemic areas of HFRS are distributed mainly in plain and hilly regions under 500 meters above t...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:1994-02-01 00:00:00
abstract::Ten Chinese Leishmania isolates from different endemic areas and hosts are characterized by isoenzyme electrophoresis for 9 enzymes. Seven were isolated from visceral leishmaniasis patients, one from an infected dog, one from a sandfly and one from a naturally infected racoon dog. Eight of the 10 isolates were indisti...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:1989-09-01 00:00:00
abstract:BACKGROUND:Various experimental and clinical studies have reported on coronary microcirculatory dysfunction ("no-reflow" phenomenon). Nevertheless, pathogenesis and effective treatment are yet to be fully elucidated. This study aimed to measure the intracoronary pressure gradient in the no-reflow artery during emergent...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:10.1097/CM9.0000000000000709
更新日期:2020-04-05 00:00:00
abstract:OBJECTIVE:To study the surgical technique and results of laryngeal function preservation in treatment of hypopharyngeal carcinoma. METHODS:A retrospective review of 305 patients with malignant neoplasms of the hypopharynx (279 males, 26 females, age ranging from 14 to 77 years) was performed from 1978 to 1996. In the ...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2002-06-01 00:00:00
abstract:BACKGROUND:Cervical arthroplasty is indicated to preserve cervical motion and prevent accelerated adjacent segment degeneration. Whether accelerated adjacent segment degeneration is prevented in the long term is unclear. This trial compared adjacent segment degeneration in Bryan disc arthroplasty with that in anterior ...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2012-11-01 00:00:00
abstract:OBJECTIVE:To study the effect for albendazole therapy for alveolar echinococcus infection in gerbils and mice. METHODS:Mice and gerbils were infected of metacestode tissues by intraperitoneal (i.p.) transplantation and treated with albendazole-medicated feeds. The effects were evaluated by comparison of the treated an...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:1998-10-01 00:00:00
abstract:BACKGROUND:The 2019 novel coronavirus has caused the outbreak of the acute respiratory disease in Wuhan, Hubei Province of China since December 2019. This study was performed to analyze the clinical characteristics of patients who succumbed to and who recovered from 2019 novel coronavirus disease (COVID-19). METHODS:C...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:10.1097/CM9.0000000000000824
更新日期:2020-06-05 00:00:00
abstract:OBJECTIVE:To investigate the complications of laparoscopic cholecystectomy in China. METHODS:All Chinese articles about laparoscopic cholecystectomy published between April 1994 and November 1995 were identified through CMCC (Chinese Medical Computerized Contents). From more than 600 titles, 105 articles were screened...
journal_title:Chinese medical journal
pub_type: 杂志文章,评审
doi:
更新日期:1997-09-01 00:00:00
abstract::Myoglobin, myosin creatine kinase MM (CK-MM), creatine kinase BB(CK-BB) in cardiac muscle and H chain of myosin in atrial and ventricular muscle were studied in specimens from 8 patients who died of sudden nocturnal death syndrome (SNDS) by avidin-biotin complex (ABC) method to investigate the possible early or very e...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:1994-01-01 00:00:00
abstract:BACKGROUND:Leber congenital amaurosis (LCA) is a visual disease which is caused by RPE65 mutations and results in retinal degeneration and severe vision loss in early infancy. According to previous researches, mutations of the RPE65 gene account for 16% of all cases of LCA. This study aimed to identify RPE65 gene mutat...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:10.4103/0366-6999.218007
更新日期:2017-11-20 00:00:00
abstract::Free radicals in the gasphase of cigarette smoke were determined by spin trapping agent PBN (N-tert-butyl-2-phenyl nitrone) and DMPO (5,5-dimethyl-1-pyrroline-oxide) on electron spin resonance spectrometer. They were identified according to the spectrum parameters calculated from the spectra. The free radicals mainly ...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:1991-07-01 00:00:00
abstract:BACKGROUND:Ischemic disease is one of the leading causes of death in the world. In order to further study gene therapy for ischemic disease, we constructed a recombinant plasmid for co-expression of human angiopoietin-1 and vascular endothelial growth factor 165(VEGF165) gene in adeno-associated virus (AAV) gene delive...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2004-04-01 00:00:00
abstract:BACKGROUND:This study was designed to obtain a recombinant retroviral vector containing the human hepatocellular carcinoma-related gene ANGPTL4 (angiopoietin-like 4) cDNA and to evaluate the anti-tumor effect of recombinant retroviral vector-mediated human ANGPTL4 gene transfection. METHODS:ANGPTL4 cDNA was cloned in ...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2004-09-01 00:00:00
abstract:OBJECTIVE:To study the clinicopathologic features and immunoprofile of angiomyofibroblastoma (AMF) with emphasis on differential diagnosis. METHODS:Seven vulvar, two vaginal and one perineal angiomyofibroblastomas were evaluated by light microscopy and immunohistochemistry. The immunohistochemical studies were perform...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2000-11-01 00:00:00
abstract:BACKGROUND:Renal artery stenosis (RAS) is always associated with abnormalities in renal microvascular perfusion (RMP). However, few imaging methods can simultaneously evaluate the degree of luminal stenosis and RMP. Thus, this study will aim to evaluate the feasibility of using contrast-enhanced ultrasound (CEUS) for a...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:10.1097/CM9.0000000000000002
更新日期:2019-01-05 00:00:00
abstract:BACKGROUND:Hepatocellular carcinoma (HCC) is a common primary cancer frequently associated with hepatitis B virus (HBV) infection. However, whether these identified genes are particularly associated with HBV-related HCC remains unknown. The aim of this study was to investigate the differential gene expression between H...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2011-07-05 00:00:00
abstract:BACKGROUND:Congenital heart disease (CHD) is a common heart condition which does considerable harm to the health of children and adolescents. CHD epidemiological characteristics of Tibetan children whose ages ranged from 4 to 18 years were investigated in Qinghai Province. METHODS:A total of 32 578 Tibetan children, l...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2008-12-20 00:00:00
abstract:OBJECTIVE:To focus on the asthmatic pathogenesis and clinical manifestations related to epithelial sodium channel (ENaC)/chlorine ion channel. DATA SOURCES:The data analyzed in this review were the English articles from 1980 to 2015 from journal databases, primarily PubMed and Google Scholar. The terms used in the lit...
journal_title:Chinese medical journal
pub_type: 杂志文章,评审
doi:10.4103/0366-6999.162494
更新日期:2015-08-20 00:00:00
abstract::The model was established in male rabbits with experimental atherosclerosis, which was induced by diet cholesterol (0.5 g per day for 8 weeks), by means of intravenous injection of one unit of pituitrin (P.P.). To evaluate the effects of aspirin, heparin and viper venom (VV) on this model, 26 male rabbits were divided...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:1995-05-01 00:00:00
abstract:BACKGROUND:A five-year follow-up study of intensive multifactorial intervention was undertaken to assess the changes of circulating serum amyloid A (SAA) levels and the incidence of atherosclerosis (AS) in patients with short-duration type 2 diabetes mellitus (T2DM) without macroangiopathy, and whether intensive multif...
journal_title:Chinese medical journal
pub_type: 杂志文章,随机对照试验
doi:
更新日期:2009-11-05 00:00:00
abstract:BACKGROUND:The primary reasons for local recurrence and therapeutic failure in the treatment of malignant gliomas are the invasion and interactions of tumor cells with surrounding normal brain cells. However, these tumor cells are hard to be visualized directly in histopathological preparations, or in experimental glio...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2012-12-01 00:00:00