Association of RANTES gene polymorphisms with susceptibility to childhood asthma: A meta-analysis.

Background: Previous investigations have illustrated that regulated upon activation, normal T-cell expressed and secreted (RANTES) polymorphisms are linked to susceptibility to childhood asthma; nevertheless, the findings continue to be controversial. Accordingly, we conducted the present meta-analysis to clarify the impact of RANTES genetic polymorphisms (-403G/A and -28C/G) on childhood asthma vulnerability.

Methods: A search for published literature was performed using the PubMed, EMBASE, Chinese National Infrastructure, Cochrane Library, Scopus, Web of Science, and WanFang databases and selected in the form of PICOS (participants, interventions, comparisons, outcomes, and study design) to identify all eligible research works.

[Two-dimensional synchronous correlation spectroscopy for probing fluorescence energy transfer].

In the present paper, the authors developed a new approach by constructing two-dimensional (2D) UV-Vis/fluorescence heterogeneous synchronous spectrum based on the orthogonal sample design scheme (OSD) developed in our previous works to characterize energy transfer among different lanthanide ions during the luminescence process. The authors use the EuCl3-NdCl3 system as an example. The preliminary experimental results on the 2D synchronous spectra of EuCl3-NdCl3 mixture solutions have demonstrated that cross peaks can be observed among the UV-Vis absorption bands from Nd3+ and fluorescence emission bands from Eu3+.

[Fluorescence spectra and protonation of ofloxacin in strong acidic solutions].

Fluorescence and UV-Vis spectra of ofloxacin (OFL) in sulfuric acid were studied. In the present paper, a new protonation state of OFL was observed. In hydrochloric acid, OFL produced bright green fluorescence upon excitation by UV radiation.

[Study on malignant and normal rectum tissues using IR and 1H and 31P NMR spectroscopy].

In the present paper, NMR spectroscopy, an effective tool to detect the variation in, molecular structure and changes in chemical composition of metabolites in tissues, was used to study the differences between malignant and normal tissues from rectum. 1H and 31P spectra of seven malignant rectum tissue samples and five normal control tissues were investigated by using a 300 M NMR spectrometers and compared with the results of the infrared spectra of normal and malignant rectum organ tissues. The results indicate that the 1H and 31P spectra of rectum cancer tissues are significantly different from those of the normal controls and most differences present in the form of variation in relative intensities of the characteristic peaks of various metabolites.

[Study of malignant and normal tissues of the rectum using NMR spectroscopy].

In the present paper, NMR spectroscopy, an effective tool to detect the variation in molecular structure and changes in chemical composition of metabolites in tissues, was used to study the differences between malignant and normal tissues from rectum. 1H spectra of four malignant rectum tissue samples and two normal control tissues were investigated by using a 500M NMR high-resolution magic angle spinning magnetic resonance spectrometers (HR-MAS NMR). The results indicate that the 1H HR-MAS spectra of rectum cancer tissues are significantly different from those of the normal controls and most differences are presents in the form of variation in the relative intensities of the characteristic peak of various metabolites.

[Progress in nuclear magnetic resonance spectroscopy for early cancer diagnosis].

Based on more than 100 references, the present paper reviews the progress in the application of nuclear magnetic resonance (NMR) spectroscopy, an effective method to study the variation in chemical composition and molecular structure in biological samples for early diagnosis of cancer at molecular level. In the past several decades, numerous works have demonstrated that NMR spectroscopy may be developed into a sensitive diagnosis method to detect cancer in early stage. Because of the rapid development of NMR spectroscopic techniques, it becomes possible to record NMR spectra of biological samples in both in-vitro and in-vivo manner.

[A study on the NMR spectrum of methyl-ofloxacin].

Ofloxacin ((+/-)-9-fluoro-3-methyl-10-(4-methylpiperazin-1-yl)-7-oxo-2, 3-dihydro-7H-pyrido[1,2,3-de]-1, 4-benzoxazine-6-carboxylic acid) is a totally synthetic fluoroquinolone antimicrobial agent with a broad spectrum of activity against Gram-positive and Gram-negative bacteria and atypical pathogens such as Mycoplasma, Chlamydia and Legionella. Even though it is widely used for the treatment of gastrointestinal, pulmonary, urinary, and other infections, the comprehensive mechanism of action at molecular level has not been known so far. It is very important to understand the structural characteristics of the drug and the effects that are caused by the environments.

[Studies on coordination and hydrogen bond intermolecular interaction using 1D & 2D FTIR spectroscopy].

Two-dimensional (2D) correlation spectroscopy is a powerful method to study the intermolecular interactions between different molecules/functional groups. In the present paper, variable concentrations were selected to construct 2D synchronous spectrum for studying the weak intermolecular interactions in solutions. Mathematical analysis performed on 2D synchronous spectra using variable concentration as an external perturbation shows that the "Orthogonal Sample Design Scheme" is necessary for eliminating the interfering cross peaks in 2D synchronous spectra.

[Study on the malignant and normal rectum tissues using 1H NMR spectroscopy].

Cancer is one of the most serious diseases, a threat to human body's health and a causes of death. The early diagnosis of cancer and timely therapy is significant for improving the survival. Owing to the complexity and limit of conventional medical diagnosis, misdiagnosis of ten occurs in many cases.

[Protective effect of quercetin against adriamycin-induced cardiotoxicity and its mechanism in mice].

This study is to investigate the protective effect of quercetin against adriamycin-induced cardiotoxicity and its mechanism. The cardiotoxicity was induced by intraperitoneal injection of adriamycin (ADR) at a single dose of 20 mg x kg(-1). Mice were randomly divided into 5 groups (n=20): normal control group, ADR 20 mg x kg(-1) group, quercetin (50, 100, and 200 mg x kg(-1) groups, intragastric administration, once a day, for 7 days before ADR administration).

[Effect of artemisinin on ischemia/reperfusion injury of isolated rat myocardium].

Objective: To observe the effect of artemisinin on the ischemia/reperfusion injury of the iisolated rat myocardium and to preliminarily study the possible mechanism.

Method: Fifty Wistar rats were randomly divided into 5 groups: a control group, an ischemia/reperfusion (I/R) group, and 3 artemisinin (AS) groups (10, 100, 1000 micromol x L(-1)), 10 rats in each group. Ischemia/reperfusion injury of the isolated rat myocardium was induced by a Langendorff system.