Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UNIPROT:P02794 (ferritin)
 17,525 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Anaplasma phagocytophilum is a gram-negative obligate intracellular bacterium that persists within neutrophils. We assessed the impact of A. phagocytophilum infection in NB4 promyelocytic leukemic cells using high-density oligoarray, two-dimensional differential gel electrophoresis and liquid chromatography-mass spectrometry. Our Affymetrix data revealed that A. phagocytophilum altered the expression of transcription factors, cell adhesion molecules, signal transduction genes, and proinflammatory cytokines. However, the expression of Toll-like receptors, MYD88, RNF36, IRF3, and TBK1 and inhibitors of the NF-kappaB gene was not altered. A. phagocytophilum infection also altered the apoptotic program of NB4 cells and resulted in increased transcription of antiapoptotic genes (MCL1 and BFL1). The transcription and translation of iron-metabolism genes (light polypeptide ferritin chain, transferrin, and the transferrin receptor) were significantly altered, suggesting a possible link between A. phagocytophilum infection and iron metabolism. Our study clearly demonstrates multifactorial effects of A. phagocytophilum infection on NB4 promyelocytic leukemic cell machinery.
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PMID:Modulation of NB4 promyelocytic leukemic cell machinery by Anaplasma phagocytophilum. 1600 78

Iron is vital for many homeostatic processes, and its liberation from ferritin nanocages occurs in the lysosome. Studies indicate that ferritin and its binding partner nuclear receptor coactivator-4 (NCOA4) are targeted to lysosomes by a form of selective autophagy. By using genome-scale functional screening, we identify an alternative lysosomal transport pathway for ferritin that requires FIP200, ATG9A, VPS34, and TAX1BP1 but lacks involvement of the ATG8 lipidation machinery that constitutes classical macroautophagy. TAX1BP1 binds directly to NCOA4 and is required for lysosomal trafficking of ferritin under basal and iron-depleted conditions. Under basal conditions ULK1/2-FIP200 controls ferritin turnover, but its deletion leads to TAX1BP1-dependent activation of TBK1 that regulates redistribution of ATG9A to the Golgi enabling continued trafficking of ferritin. Cells expressing an amyotrophic lateral sclerosis (ALS)-associated TBK1 allele are incapable of degrading ferritin suggesting a molecular mechanism that explains the presence of iron deposits in patient brain biopsies.
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PMID:Autophagy-Independent Lysosomal Targeting Regulated by ULK1/2-FIP200 and ATG9. 2887 69