Use of Protoporphyrins to Evaluate Heme Oxygenase Problematical To the Editor: In the recent report by Vera et al1 with an associated editorial commentary by N.G. Abraham,2 cobalt protoporphyrin (CoPP) is used as an inducer of heme oxygenase-1 to demonstrate that heme oxygenase-1 prevents angiotensin II hypertension. The possibility CoPP interactions with a variety of other hemecontaining prote...

Emerging evidence supports an important role for the heme oxygenase system (HO-1) in the maintenance of a healthy pregnancy, especially during pathological challenge. HO-1 is widely accepted to be a highly sensitive and reliable marker of oxidative stress. Hence the present study was planned to analyse heme oxygenase-1 and lipid profile in maternal and cord blood venous samples of normal pregna...

The development of heme oxygenase (HO) inhibitors is critical in dissecting and understanding the HO system and for potential therapeutic applications. We have established a program to design and optimize HO inhibitors using structure-activity relationships in conjunction with X-ray crystallographic analyses. One of our previous complex crystal structures revealed a putative secondary hydrophob...

Heme oxygenase-1 (HO-1) is central to the regulation of oxidative injury. The role of increased HO-1 expression and Heme oxygenase (HO) activity in mitigating the detrimental side effect of diabetes is examined. A review of the mechanism(s) of action is included. This may lead to the development of pharmacological and genetic approaches to mitigate the clinical complications associated with the...

Taurine chloramine is the major chloramine generated in activated neutrophils via the reaction between the overproduced hypochlorous acid and the stored taurine. Taurine chloramine has anti-inflammatory and cytoprotective effects in inflamed tissues by inhibiting the production of inflammatory mediators. Taurine chloramine increases heme oxygenase activity and also protects against hydrogen per...

Two cDNA clones for rat heme oxygenase have been isolated from a rat spleen cDNA library in lambda gt11 by immunological screening using a specific polyclonal antibody. One of these clones has an insert of 1530 nucleotides that contains the entire protein-coding region. To confirm that the isolated cDNA encodes heme oxygenase, we transfected monkey kidney cells (COS-7) with the cDNA carried in ...