OBJECTIVE To systematically review the evidence on the effect of cotrimoxazole (CTX) on malaria in HIV-positive individuals on antiretroviral therapy (ART). METHODS Web of Science, PubMed and MEDLINE, EMBASE, Global Health and Cochrane Library databases were searched using terms for malaria, HIV and CTX. Studies meeting the inclusion criteria were reviewed and assessed for bias and confoundin...

Cholera toxin (CTX), an activator of Gs protein, is an important pharmacological tool in G protein research. The effect and the mechanism of action of CTX in the gastrointestinal smooth muscle, including the internal anal sphincter (IAS), are not known. The present investigation was carried out to examine the effects of CTX on the signal transduction associated with the adenylate cyclase (AC) p...

Cefotaximases (CTX-M) are a rapidly growing class A beta-lactamase family that has been found among a wide range of clinical bacteria. One hundred and six isolates were selected from 278,308 Salmonella isolates based on resistance to ampicillin and cephalosporins and subjected to further characterization. Fourteen isolates were bla(CTX-M) PCR positive, and cefotaxime MICs for these isolates wer...

OBJECTIVES High levels of β-lactamase production can impact treatment with a β-lactam/β-lactamase inhibitor combination. Goals of this study were to: (i) compare the mRNA and protein levels of CTX-M-15- and CTX-M-14-producing Escherichia coli from 18 different STs and 10 different phylotypes; (ii) evaluate the mRNA half-lives and establish a role for chromosomal- and/or plasmid-encoded factors;...

Abstract Background In the current treatment of non-small cell lung cancer (NSCLC), traditional chemotherapy causes high toxicity, so it is necessary to develop safe chemical drug delivery vehicles clinically. Chemotherapy monotherapy prone resistance. combined with other therapies such as nucleic acid drugs an effective way avoid resistance and toxicity continuous chemotherapy. this study, siR...

Of 167 Vibrio cholerae isolates screened for sequences homologous with zonula occludens toxin (zot) or cholera toxin (ctx) genes, 3.0% of non-O1, 100.0% of clinical O1, and 0.0% of environmental O1 strains contained both zot and ctx. zot was present only in strains that were ctx positive; all ctx-positive strains carried zot. The absence of zot-positive, ctx-negative strains suggests ZOT is not...

The properties of the K+ pathway underlying regulatory volume decrease (RVD) in human blood lymphocytes were investigated. Evidence is presented for the existence of three types of K+ conductance in these cells. Ionomycin, a Ca2+ ionophore, induced a K(+)-dependent hyperpolarization, indicating the presence of Ca2(+)-activated K+ channels, which were blocked by charybdotoxin (CTX). CTX also ind...

In 'embryonic' nicotinic receptors, low CTx concentrations are known to block only the αδ binding site, whereas binding of ACh at the αγ-site elicits short single channel openings and short bursts. In adult muscles the αγ- is replaced by the αε-site. Quantal EPSCs (qEPSCs) were elicited in adult muscles by depolarization pulses and recorded through a perfused macropatch electrode. One to 200 nm...

BACKGROUND Crotoxin (CTX) is a potent neurotoxin from Crotalus durissus terrificus snake venom (CdtV) composed of two subunits: one without catalytic activity (crotapotin), and a basic phospolipase A2. Recent data have demonstrated that CdtV or CTX inhibit some immune and inflammatory reactions. AIM The aim of this paper was to investigate the mechanisms involved in these impaired responses. ...

OBJECTIVES To determine factors associated with CTX-M-producing ST131 Escherichia coli which is the worldwide predominant lineage among CTX-M-producing E. coli isolates. METHODS Consecutive inpatients with a clinical sample positive for CTX-M-producing E. coli and considered as cases in a previous 8-month (2008-2009) case-control study performed in ten university hospitals in the Paris area w...