[Effects of exogenous salicylic acid and brassinolide on photosynthesis of cucumber seedlings under low temperature stress.].

An experiment was conducted to investigate the mechanism of the regulation of salicylic acid (SA) and 2,4-epibrassionolide (EBR) on photosynthesis in cucumber (Cucumis sativa) seedlings under low temperature stress. Taking cucumber cultivar 'Youbo1-5' as material, the seedlings were pre-treated with 1 mmol·L SA or 0.1 μmol·LEBR (sprayed once a day), and then were exposed to chilling temperature (10 ℃/5 ℃, PFD 80 μmol·m·s) after being pre-treated 2 days.

Identifying the potential extracellular electron transfer pathways from a c-type cytochrome network.

Extracellular electron transfer (EET) is the key feature of some bacteria, such as Geobacter sulfurreducens and Shewanella oneidensis. Via EET processes, these bacteria can grow on electrode surfaces and make current output of microbial fuel cells. c-Type cytochromes can be used as carriers to transfer electrons, which play an important role in EET processes.

Ru(II) sensitized lanthanide luminescence: synthesis, photophysical properties, and near-infrared luminescent determination of alpha-fetal protein (AFP).

A series of dinuclear compounds of [Ru(bpy)(2)(tpphz)Ln(TTA)(3)](PF(6))(2) (tpphz = tetrapyrido[3,2-a:2',3'-c:3'',2''-h:3''',4'''-j]phenazine; Ln = Er(III), Nd(III), Yb(III) and Gd(III); TTA = 2-thenoyltrifluoroacetone) have been prepared by attachment of a [Ln(TTA)(3)] fragment at the vacant diimine site of the luminescent mononuclear complex [Ru(bpy)(2)(tpphz)](PF(6))(2). In the solid state, in CH(2)Cl(2) solution and in Tris-HCl buffer solution of these dinuclear complexes Ru-Ln, sensitized near-infrared (NIR) luminescence is observed from Nd and Yb centres following excitation of the d-block unit, which results from the effective Ru → Ln (Ln = Nd, Yb) energy transfer, but no Er-based NIR luminescence is produced. The (3)MLCT (MLCT = metal to ligand charge transfer) emission is partly quenched in the Ru-Nd complex, slightly increased in the Ru-Yb complex, and is not changed in the Ru-Ercomplex.

Sequence-based prediction of DNA-binding residues in proteins with conservation and correlation information.

The recognition of DNA-binding residues in proteins is critical to our understanding of the mechanisms of DNA-protein interactions, gene expression, and for guiding drug design. Therefore, a prediction method DNABR (DNA Binding Residues) is proposed for predicting DNA-binding residues in protein sequences using the random forest (RF) classifier with sequence-based features. Two types of novel sequence features are proposed in this study, which reflect the information about the conservation of physicochemical properties of the amino acids, and the correlation of amino acids between different sequence positions in terms of physicochemical properties.

[Establishment of BGC-823/pBaBb-puro-MACC1 gastric cancer cell line stably expressing MACC1 and its tumor-related gene expression profiles].

Objective: To establish a gastric cancer cell line with stable expression of metastasis-associated in colon cancer 1 (MACC1) and detect the changes in tumor-related gene expression profiles for investigating the possible regulation mechanisms between MACC1 and the differentially expressed genes.

Methods: The full-length MACC1 cDNA was amplified from human embryonic kidney 293FT cells and cloned into the pBaBb-puro vector. The recombinant pBaBb-puro-MACC1 expression vector, after identification with restriction enzyme digestion, was transfected into 293FT cells, and the expression of fluorescent reporter gene was observed.

[Effect of glypican-3 on the proliferation of human hepatoma cell line MHCC97-L in vitro].

Objective: To construct glypican-3 (GPC3)-green fluorescent protein eukaryotic expression vector pEGFP-c3-GPC3, and analyze the effect of GPC3 on the proliferation of human hepatoma cell line MHCC-97L.

Methods: The eukaryotic expression vector pEGFP-c3-GPC3 was constructed with recombinant DNA technique and transfected into MHCC-97L cells via Lipofectamine 2000. The cells stably expressing GPC3 were screened by flow cytometry and G418.

KRAS and PIK3CA but not BRAF genes are frequently mutated in Chinese cholangiocarcinoma patients.

Cholangiocarcinoma (CCA) is a rare but lethal malignancy arising from the biliary tract epithelium. It has a poor prognosis largely due to the difficulties of early diagnosis and the lack of effective therapies. It is thus imperative to develop new and effective treatments for CCA, which depends heavily on the mechanistic understanding of the disease.

Retrospective study of photodynamic therapy vs photodynamic therapy combined with chemotherapy and chemotherapy alone on advanced esophageal cancer.

Objective: To compare the short-term curative effect of photodynamic therapy (PDT), PDT combined with chemotherapy and chemotherapy alone on the advanced esophageal cancer patients.

Methods: Retrospective analysis of 90 patients of esophageal cancer underwent PDT, PDT combined with chemotherapy and chemotherapy alone from 2004 to 2007 (stages III-IV), including 27 cases received PDT alone, 33 cases received PDT combined with chemotherapy and 30 cases chemotherapy alone. The enrolled patients were treated with intravenous administration of Photofrin as the photosensitizer at a dose of 2mg/kg.

[Inhibitory effect of SHP-1 gene transfer on the proliferation of breast cancer cell line MDA-MB-231].

Objective: To observe SHP-1 protein expression in breast cancer cell line MDA-MB-231 before and after SHP-1 gene transfer and its effect on the proliferation of MDA-MB-231 cells.

Methods: The eukaryotic expression vector pEGFP-C3-SHP-1 was constructed and transfected into breast cancer cell line MDA-MB-231 via Lipofectamine 2000, and the positive clones were selected using G418. SHP-1 expression in MDA-MB-231 cells was detected with immunocytochemistry and Western blotting, and the cell growth curve was observed using MTT assay.

PAK4 kinase is essential for embryonic viability and for proper neuronal development.

The serine/threonine kinase PAK4 is a target for the Rho GTPase Cdc42 and has been shown to regulate cell morphology and cytoskeletal organization in mammalian cells. To examine the physiological and developmental functions of PAK4, we have disrupted the PAK4 gene in mice. The absence of PAK4 led to lethality by embryonic day 11.