BACKGROUNDSeveral studies have evaluated the association between polymorphisms of thymidylate synthase (TS) and cancer risk in diverse populations but with conflicting results. By pooling the relatively small samples in each study, it is possible to evaluate the association using a meta-analysis.

METHODSA comprehensive search was conducted to identify all case-control studies on TS on a 28-bp tandem repeats in 5'untranslated region (5'UTR) and a 6-bp insertion (ins) and deletion (del) mutation in 3'UTR of the gene and cancer risk. Meta-analysis was conducted using a fixed and random effect model.

RESULTSOur meta-analysis on a total of 13 307 cancer cases and 18 226 control subjects from 37 published case-control studies showed no significant association between the risk of cancer and the 5'UTR 28-bp tandem repeats polymorphism (3R/3R vs. 2R/2R: OR = 1.06, 95%CI, 0.93 - 1.20) or the 3'UTR 6-bp ins/del polymorphism (del6/del6 vs. ins6/ins6: OR = 0.93, 95%CI, 0.81 - 1.08) with significant between-study heterogeneity. In the cancer type- and ethnic subgroup-stratification analyses, we did not find any association between TS polymorphisms and cancer risk either.

CONCLUSIONTS 5'UTR 28-bp tandem repeats and 3'UTR 6-bp ins/del polymorphisms may not be associated with cancer risk.

3' Untranslated Regions ; genetics ; 5' Untranslated Regions ; genetics ; Case-Control Studies ; Genetic Predisposition to Disease ; genetics ; Humans ; Neoplasms ; epidemiology ; genetics ; Polymorphism, Genetic ; genetics ; Tandem Repeat Sequences ; genetics ; Thymidylate Synthase ; genetics

OBJECTIVE: To improve the successful rate of operation and the livability in establishing acute myocardial ischemic rat model. METHODS: The successful rate of animal experiment is compared between traditional method and improved method. RESULTS: The successful rate of improved method was 90%, which was much higher than 30% in successful rate of traditional method. CONCLUSION The improved method may reduce the difficulty of operation remarkably and cut down the experiment expenditure, which is superior to traditional method.
Acute Disease ; Anesthesia, General/methods* ; Animals ; Coronary Vessels/surgery* ; Disease Models, Animal ; Intubation, Intratracheal/methods* ; Ketamine/chemistry* ; Male ; Myocardial Ischemia/pathology* ; Rats ; Rats, Sprague-Dawley

According to folk usage of Aconitum carmichaelii Debx., the present study was designed to determine the feasibility of the stems and leaves of Aconitum carmichaelii Debx. as a new medicinal resource. Fourteen alkaloids in mother roots, fibrous roots, stems, and leaves of Aconitum carmichaelii Debx. were measured by HPLC-MS/MS. And multivariate analysis methods, such as clustering analysis and principal component analysis, were applied to analyze the difference among various parts. In addition, the acute toxicity, analgesia, and anti-inflammatory tests were carried out. The results suggested that the contents of alkaloids in mother roots and fibrous roots were approximate, but those of leaves and stems were different from mother roots and fibrous roots. The results of the acute toxicity testing demonstrated the toxicity of fibrous root was strongest, and mother roots were slightly less toxic than fibrous roots. The stems and leaves were far less toxic than mother and fibrous roots. In addition, the analgesia and inflammatory tests showed the effects of the various tissues had no difference each other. These results provided a basis for developing new complementary and alternative treatments for rheumatoid arthritis patients. Simultaneously, the approach may also turn wastes into treasure and promote the development of circular economy.
Aconitum ; chemistry ; Alkaloids ; administration & dosage ; chemistry ; toxicity ; Animals ; Anti-Inflammatory Agents ; administration & dosage ; chemistry ; toxicity ; Arthritis, Rheumatoid ; drug therapy ; Chromatography, High Pressure Liquid ; Drug Evaluation, Preclinical ; Drugs, Chinese Herbal ; administration & dosage ; chemistry ; toxicity ; Female ; Humans ; Male ; Mice ; Plant Leaves ; chemistry ; Plant Roots ; chemistry ; Plant Stems ; chemistry ; Tandem Mass Spectrometry