introduction: the purpose of this study was to determine na-ca exchanger 2, 3 (ncx2, 3) protein level changes during 2, 5, 10, 15 days after induction of normobaric hyperoxia (ho) preconditioning. materials and methods: rats were divided in two experimental groups. the first group was exposed to 95% inspired ho for 4 h/day for 6 consecutive days (ho). the second group acted as control, and was ...

Heme oxygenase-1 (HO-1) overexpression protects against tissue injury in many inflammatory processes, including ischemia/reperfusion injury (IRI). This study evaluated whether genetically decreased HO-1 levels affected susceptibility to liver IRI. Partial warm ischemia was produced in hepatic lobes for 90 min followed by 6 h of reperfusion in heterozygous HO-1 knockout (HO-1(+/-)) and HO-1(+/+)...

Elevated levels of carbon monoxide (CO) are found in the exhaled breath of patients with inflammatory diseases such as asthma and cystic fibrosis. Endogenous CO is derived from heme oxygenase (HO) (EC 1.14.99.3), which catabolizes heme-producing CO and biliverdin. There are three isoforms of HO: HO-1 is inducible by inflammatory cytokines and oxidants, including nitric oxide (NO), whereas HO-2 ...

A novel HO gene (Uv-HO) was cloned from the Saccharomyces bayanus var. uvarum (abbreviated as S. uvarum in this study) type strain. The coding region of Uv-HO showed relatively high homology (95%) to that of the Sb-HO gene (S. bayanus var. bayanus HO), but not to the HO genes of other Saccharomyces sensu stricto species. However, the 5' and 3' non-coding region of Uv-HO showed less similarity (...

Heme oxygenase-1 (HO-1) transgenic mice (Tg) were created using a rat HO-1 genomic transgene. Transgene expression was detected by RT-PCR and Western blots in the left ventricle (LV), right ventricle (RV) and septum (S) in mouse hearts, and its function was demonstrated by the elevated HO enzyme activity. Tg and non-transgenic (NTg) mouse hearts were isolated and subjected to ischemia/reperfusi...

The ultimate product of yeast mating-type interconversion is a stable a/alpha diploid cell. A haploid cell carrying the HO gene gives rise to a diploid cell in a two-step process: first, the cell switches mating type as a result of genetic rearrangement (cassette substitution) catalyzed by HO; then, cells of opposite type mate to form a/alpha diploids. Mating-type interconversion does not occur...