Results 81 to 90 of about 414,309 (352)

Intravascular hemolysis activates complement via cell-free heme and heme-loaded microvesicles.

JCI Insight, 2018
In hemolytic diseases, such as sickle cell disease (SCD), intravascular hemolysis results in the release of hemoglobin, heme, and heme-loaded membrane microvesicles in the bloodstream.
N. Merle, Anne Grunenwald, Helena Rajaratnam, V. Gnemmi, Marie Frimat, Marie-Lucile Figueres, Samantha Knockaert, Sanah Bouzekri, D. Charue, Rémi Noé, Tania Robe-Rybkine, Marie Le-Hoang, Nathan Brinkman, T. Gentinetta, M. Edler, S. Petrillo, E. Tolosano, S. Miescher, Sylvain Le Jeune, P. Houillier, S. Chauvet, M. Rabant, J. Dimitrov, V. Frémeaux-Bacchi, O. Blanc-Brude, L. Roumenina   +25 more
semanticscholar   +1 more source

Identification of serum protein biomarkers for pre‐cancerous lesions associated with pancreatic ductal adenocarcinoma

Molecular Oncology, EarlyView.
This work identified serum proteins associated with pancreatic epithelial neoplasms (PanINs) and early‐stage PDAC. Proteomics screens assessed genetically engineered mice with abundant PanINs, KPC mice (Lox‐STOP‐Lox‐KrasG12D/+ Lox‐STOP‐Lox‐Trp53R172H/+ Pdx1‐Cre) before PDAC development and also early‐stage PDAC patients (n = 31), compared to benign ...
Hannah Mearns, Jaclyn S. Long, Sergio Lilla, Kelly Hodge, Marcus J. G. W. Ladds, Colin Nixon, Paula Fernández‐Palanca, Sara Zanivan, Pilar Acedo, Stephen P. Pereira, Kevin M. Ryan   +10 more
wiley   +1 more source

A conserved two-component system senses intracellular iron levels and regulates redox balance in Mycobacterium spp.

Microbiology Spectrum
For bacteria, an intricate coordination between sensing and regulating iron levels and managing oxidative stress is required as their levels are tightly interlinked.
Rahul Yadav, Deepak Kumar Saini
doaj   +1 more source

CCS2, an Octatricopeptide-Repeat Protein, Is Required for Plastid Cytochrome c Assembly in the Green Alga Chlamydomonas reinhardtii

Frontiers in Plant Science, 2017
In bacteria and energy generating organelles, c-type cytochromes are a class of universal electron carriers with a heme cofactor covalently linked via one or two thioether bonds to a heme binding site. The covalent attachment of heme to apocytochromes is
Sara G. Cline, Sara G. Cline, Isaac A. Laughbaum, Patrice P. Hamel, Patrice P. Hamel   +4 more
doaj   +1 more source

Heme and hemoglobin utilization by Mycobacterium tuberculosis

Nature Communications, 2019
Iron is essential for growth of Mycobacterium tuberculosis (Mtb), but most iron in the human body is stored in heme within hemoglobin. Here, we demonstrate that the substrate-binding protein DppA of the inner membrane Dpp transporter is required for heme
Avishek Mitra, Y. Ko, G. Cingolani, M. Niederweis   +3 more
semanticscholar   +1 more source

Iron homeostasis disruption and lipid peroxidation in skeletal muscle during short‐term immobilization

FEBS Open Bio, EarlyView.
14‐day casting‐induced immobilization reduced gastrocnemius muscle mass and increased non‐heme iron and ferritin heavy chain levels. Despite iron accumulation, transferrin receptor 1 and iron regulatory protein 2 were paradoxically upregulated. Lipid peroxidation was elevated without compensatory antioxidant responses.
Haruka Yokogawa, Kazuhiko Higashida, Naoya Nakai   +2 more
wiley   +1 more source

Resistance of Nitric Oxide Dioxygenase and Cytochrome c Oxidase to Inhibition by Nitric Oxide and Other Indications of the Spintronic Control of Electron Transfer

Biophysica
Heme enzymes that bind and reduce O2 are susceptible to poisoning by NO. The high reactivity and affinity of NO for ferrous heme produces stable ferrous-NO complexes, which in theory should preclude O2 binding and turnover.
Paul R. Gardner
doaj   +1 more source

The GluTR-binding protein is the heme-binding factor for feedback control of glutamyl-tRNA reductase

eLife, 2019
Synthesis of 5-aminolevulinic acid (ALA) is the rate-limiting step in tetrapyrrole biosynthesis in land plants. In photosynthetic eukaryotes and many bacteria, glutamyl-tRNA reductase (GluTR) is the most tightly controlled enzyme upstream of ALA.
Andreas S Richter, Claudia Banse, Bernhard Grimm   +2 more
doaj   +1 more source

G-quadruplexes sequester free heme in living cells

bioRxiv, 2019
Heme is an essential cofactor for many enzymes, but free heme is toxic and its levels are tightly regulated. G-quadruplexes bind heme avidly in vitro, raising the possibility that they may sequester heme in vivo. If so, then treatment that displaces heme
Lucas T Gray, Emilia Puig Lombardi, D. Verga, C. Guetta, A. Nicolas, M. Teulade‐Fichou, A. Londoño-Vallejo, N. Maizels   +7 more
semanticscholar   +1 more source

Combined 5‐aminolevulinic acid and ferric ammonium citrate treatment promotes hair follicle growth by activating dermal papilla cells

FEBS Open Bio, EarlyView.
5‐Aminolevulinic acid combined with ferric ammonium citrate (5‐ALA/FAC) stimulates dermal papilla cell activity and promotes hair follicle growth. The treatment enhances ERK and AKT signaling, increases hair‐inductive gene expression, and restores dermal papilla function suppressed by dihydrotestosterone and oxidative stress, resulting in enhanced hair
Han‐Wook Ryu, Eok‐Soo Oh, Sewoon Kim
wiley   +1 more source