HIF1α stabilization in hypoxia is not oxidant-initiated.

Hypoxic adaptation mediated by HIF transcription factors requires mitochondria, which have been implicated in regulating HIF1α stability in hypoxia by distinct models that involve consuming oxygen or alternatively converting oxygen into the second messenger peroxide. Here, we use a ratiometric, peroxide reporter, HyPer to evaluate the role of peroxide in regulating HIF1α stability. We show that antioxidant enzymes are neither homeostatically induced nor are peroxide levels increased in hypoxia.

Roles of Staphylococcus aureus Mnh1 and Mnh2 Antiporters in Salt Tolerance, Alkali Tolerance, and Pathogenesis.

has three types of cation/proton antiporters. The type 3 family includes two ultisubunit a/ (Mnh) antiporters, Mnh1 and Mnh2. These antiporters are clusters of seven hydrophobic membrane-bound protein subunits.

Significance of four methionine sulfoxide reductases in Staphylococcus aureus.

Staphylococcus aureus is a major human pathogen and emergence of antibiotic resistance in clinical staphylococcal isolates raises concerns about our ability to control these infections. Cell wall-active antibiotics cause elevated synthesis of methionine sulfoxide reductases (Msrs: MsrA1 and MsrB) in S. aureus.

Transcriptional dysregulation in Huntington's disease: a failure of adaptive transcriptional homeostasis.

Huntington's disease (HD) is a signature polyglutamine disorder. An enduring theory of HD pathogenesis has involved dysregulation of transcription. Indeed, transcriptional regulatory proteins can be modulated to overcome cardinal features of HD-modeled mice, and efforts to move these into human studies are ongoing.

Antioxidant Functions of Nitric Oxide Synthase in a Methicillin Sensitive Staphylococcus aureus.

Nitric oxide and its derivative peroxynitrites are generated by host defense system to control bacterial infection. However certain Gram positive bacteria including Staphylococcus aureus possess a gene encoding nitric oxide synthase (SaNOS) in their chromosome. In this study it was determined that under normal growth conditions, expression of SaNOS was highest during early exponential phase of the bacterial growth.

Evaluation of two novel rapid rKE16 antigen-based tests for diagnosis of visceral leishmaniasis in India.

We compared the two formats of rKE16 antigen-based rapid tests, a flowthrough test (KEFT) and a lateral flow test (KELF), with the rK39 rapid test for the diagnosis of visceral leishmaniasis. Sensitivities with KEFT (99%, 198/200) and rK39 (99.5%, 199/200) were comparable and higher than that with KELF (95.

rK39 antigen for the diagnosis of visceral leishmaniasis by using human saliva.

The rK39 rapid immunochromatographic test (ICT) is now being widely used in the diagnosis of visceral leishmaniasis (VL) using serum. We evaluated the presence of anti-rK-39 antibody in human saliva being noninvasive to replace the invasive procedures of diagnosis. Enzyme-linked immunosorbent assay (ELISA) and ICT assays were performed in 300 subjects: 114-confirmed VL patients, 95 and 47 healthy controls from endemic and nonendemic regions, respectively, and 44 subjects with different diseases.

Noninvasive molecular diagnosis of human visceral leishmaniasis.

Previously developed methods for noninvasive PCR diagnosis of visceral leishmaniasis (VL) have significant limitations. Diagnosis of VL using PCR and buccal swabs was evaluated in 307 subjects, including 148 patients confirmed to have VL. This method is simple and well tolerated and has good potential for development, showing 83% sensitivity with 90.