[Decomposition dynamics of leaf litter in logging residue of a secondary Castanopsis carlesii plantation and its chemical composition changes].

A field experiment was conducted to understand the decomposition rates and chemical composition changes of leaf litter in logging residues of a 35-year-old secondary Castanopsis carlesii plantation over a period of one year. Mass loss rate of leaf litter showed an exponential decrease with time from May 2012 to April 2013, with a total 80% loss of initial dry mass. Net potassium (K) release was observed during this period, with only 5% of initial K remained.

[Comparison on concentrations and quality of dissolved organic matter in throughfall and stemflow in a secondary forest of Castanopsis carlesii and Cunninghamia lanceolata plantation].

In this paper, monthly variation of dissolved organic matter (DOM) concentrations as well as humification and aromaticity indices in throughfall and stemflow from secondary broadleaved Castanopsis carlesii (BF) forest and Cunninghamia lanceolata plantation (CP) were measured. The DOC concentrations in throughfall were significantly higher with greater variation in BF than in CP. The concentrations of DOC in throughfall were averagely 7.

[Prognosis of patients with early enteral nutrition after gastrointestinal operation: a meta-analysis].

Objective: To systematically assess the effect of early enteral nutrition support after gastrointestinal operation on prognosis.

Methods: The Cochrane Library, PubMed, CBM, CNKI, Wanfang, and VIP databases were retrieved via computer system for randomized controlled trails(RCTs) with early enteral nutrition support to patients undergoing gastrointestinal operation. Quality of studies was evaluated by the Cochrane Jadad rating scale.

The association of matrix metalloproteinase-1 genetic polymorphism (-1607 1G>2G) with colorectal cancer: a meta-analysis.

Several case-control studies on the relation between matrix metalloproteinase (MMP)-1 gene -1607 1G>2G polymorphism and colorectal cancer do not have similar conclusions. The previous two meta-analyses focusing on the same issue also were inconsistent. To further evaluate the relation between the MMP-l gene polymorphism and colorectal cancer, we selected eight case-control studies related to MMP-1 gene polymorphism and colorectal cancer by searching MEDLINE, Embase, CANCERLIT, American Association for Cancer Research, Chinese Biomedical Literature Database, Chinese CNKI, and Wanfang database.

CD146 expression correlates with epithelial-mesenchymal transition markers and a poor prognosis in gastric cancer.

CD146 has been regarded as a novel potential therapeutic target for multiple cancers. The aim of the study was to investigate the expression of CD146 in gastric cancer and evaluate its clinical-pathological and prognostic significance. The expression of CD146 and three epithelial-mesenchymal transition (EMT)-related proteins (E-cadherin, β-catenin and vimentin) was examined in 144 gastric cancers by immunohistochemistry.

Isolated pancreatic granulocytic sarcoma: a case report and review of the literature.

Granulocytic sarcoma (GS) is an extramedullary tumor mass consisting of immature myeloid cells. Isolated pancreatic granulocyte sarcoma is extremely rare. We report a very unusual pancreatic granulocytic sarcoma in a patient without acute myeloid leukemia.

Sampling survey of disability in 0-6 year-old children in China.

Objective: To investigate the current status of disabled children and prevalence of disabilities in children aged 0-6 years and their risk factors, and to provide scientific evidence for making relevant policies for disabled children.

Methods: In a community-based cross-sectional study, multi-phase, stratified, unequal proportional and cluster sampling was adopted to survey 60 124 children aged 0-6 years. All the investigated children were screened for disabilities, and those with positive screening tests were further diagnosed by various specialties.

[Significance of detection of K-ras gene mutations and CA19-9 in serum for diagnosis of pancreatic carcinoma].

Background & Objective: The early diagnosis of pancreatic carcinoma is difficult. The serum tumor markers such as CA19-9 have a relatively high sensitivity but with low specificity. The oncogene K-ras is frequently mutated in pancreatic carcinoma and with high specificity.

[In situ gene therapy for murine gastric carcinoma with UPRT/5-FU enzyme/prodrug system mediated by retrovirus].

Background & Objective: 5-Fluorouracil(5-FU), a widely used chemotherapeutic drug, has a limited overall effect in the treatment of human solid tumors due to resistance. This study was designed to investigate if antitumor activation of 5-FU could be enhanced by transfection of uracil phosphoribosyltransferase(UPRT) gene.

Methods: The UPRT gene encoding uracil phosphoribosyltransferase was amplified from Escherichia Coli K12 genome and subcloned into retrovirus expression vector pLXSN, Recombinant retrovirus was packaged and used further to infect murine gastric cancer cell line MFC.