PMID- 37237924 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20230530 IS - 2076-3921 (Print) IS - 2076-3921 (Electronic) IS - 2076-3921 (Linking) VI - 12 IP - 5 DP - 2023 May 7 TI - Metabolic Functions of Biliverdin IXbeta Reductase in Redox-Regulated Hematopoietic Cell Fate. LID - 10.3390/antiox12051058 [doi] LID - 1058 AB - Cytoprotective heme oxygenases derivatize heme to generate carbon monoxide, ferrous iron, and isomeric biliverdins, followed by rapid NAD(P)H-dependent biliverdin reduction to the antioxidant bilirubin. Recent studies have implicated biliverdin IXbeta reductase (BLVRB) in a redox-regulated mechanism of hematopoietic lineage fate restricted to megakaryocyte and erythroid development, a function distinct and non-overlapping from the BLVRA (biliverdin IXalpha reductase) homologue. In this review, we focus on recent progress in BLVRB biochemistry and genetics, highlighting human, murine, and cell-based studies that position BLVRB-regulated redox function (or ROS accumulation) as a developmentally tuned trigger that governs megakaryocyte/erythroid lineage fate arising from hematopoietic stem cells. BLVRB crystallographic and thermodynamic studies have elucidated critical determinants of substrate utilization, redox coupling and cytoprotection, and have established that inhibitors and substrates bind within the single-Rossmann fold. These advances provide unique opportunities for the development of BLVRB-selective redox inhibitors as novel cellular targets that retain potential for therapeutic applicability in hematopoietic (and other) disorders. FAU - Bahou, Wadie F AU - Bahou WF AUID- ORCID: 0000-0001-6527-8503 AD - Department of Medicine, School of Medicine, Stony Brook University, Stony Brook, NY 11794, USA. FAU - Marchenko, Natalia AU - Marchenko N AD - Department of Pathology, Stony Brook University, Stony Brook, NY 11794, USA. FAU - Nesbitt, Natasha M AU - Nesbitt NM AUID- ORCID: 0000-0001-5549-0383 AD - Blood Cell Technologies, 25 Health Sciences Drive, Stony Brook, NY 11790, USA. LA - eng GR - HL150927/NH/NIH HHS/United States PT - Journal Article PT - Review DEP - 20230507 PL - Switzerland TA - Antioxidants (Basel) JT - Antioxidants (Basel, Switzerland) JID - 101668981 PMC - PMC10215512 OTO - NOTNLM OT - antioxidant OT - cytoprotection OT - erythroid development OT - megakaryocyte COIS- N.M.N. is the Chief Scientific Officer of Blood Cell Technologies, which is developing selective BLVRB redox inhibitors for therapeutic applications. The funding agencies had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript; or in the decision to publish the results. EDAT- 2023/05/27 09:42 MHDA- 2023/05/27 09:43 PMCR- 2023/05/07 CRDT- 2023/05/27 01:03 PHST- 2023/03/24 00:00 [received] PHST- 2023/04/19 00:00 [revised] PHST- 2023/04/27 00:00 [accepted] PHST- 2023/05/27 09:43 [medline] PHST- 2023/05/27 09:42 [pubmed] PHST- 2023/05/27 01:03 [entrez] PHST- 2023/05/07 00:00 [pmc-release] AID - antiox12051058 [pii] AID - antioxidants-12-01058 [pii] AID - 10.3390/antiox12051058 [doi] PST - epublish SO - Antioxidants (Basel). 2023 May 7;12(5):1058. doi: 10.3390/antiox12051058.