{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"institution":[{"name":"bioRxiv"}],"indexed":{"date-parts":[[2026,4,30]],"date-time":"2026-04-30T15:00:24Z","timestamp":1777561224577,"version":"3.51.4"},"posted":{"date-parts":[[2023,7,28]]},"group-title":"Physiology","reference-count":76,"publisher":"openRxiv","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"accepted":{"date-parts":[[2023,7,28]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                <jats:p>\n                  In recent years, general hypoxia-inducible factor (HIF)-prolyl hydroxylase (PHD) enzyme inhibitors have been developed for the treatment of anemia due to renal disease and osteoporosis. However, it remains a challenge to target the HIF signaling pathway without dysregulating the skeletal and hematopoietic system. Here, we examined the effects of\n                  <jats:italic>Vhl<\/jats:italic>\n                  deletion in bone by performing longitudinal analyses of\n                  <jats:italic>Vhl<\/jats:italic>\n                  cKO mice at 3, 6, 10, and 24 weeks of age, where at 10 and 24 weeks of age, high bone mass and splenomegaly are present. Using flow cytometry, we observed increased frequency (%) of CD71\n                  <jats:sup>lo<\/jats:sup>\n                  TER119\n                  <jats:sup>hi<\/jats:sup>\n                  FSC\n                  <jats:sup>lo<\/jats:sup>\n                  orthochromatophilic erythroblasts and reticulocytes in 10- and 24-week-old\n                  <jats:italic>Vhl<\/jats:italic>\n                  cKO bone marrow (BM), which correlated with elevated erythropoietin levels in the BM and increased number of red blood cells in circulation. The absolute numbers of myeloerythroid progenitors (MEPs) in the BM were significantly reduced at 24 weeks. Bulk RNA-Seq of the MEPs showed upregulation of\n                  <jats:italic>Epas1<\/jats:italic>\n                  (\n                  <jats:italic>Hif1a)<\/jats:italic>\n                  and\n                  <jats:italic>Efnb2<\/jats:italic>\n                  (\n                  <jats:italic>Hif2a)<\/jats:italic>\n                  in\n                  <jats:italic>Vhl<\/jats:italic>\n                  cKO MEPs, consistent with a response to hypoxia, and genes involved in erythrocyte development, actin filament organization, and response to glucose. Additionally, histological analysis of\n                  <jats:italic>Vhl<\/jats:italic>\n                  cKO spleens revealed red pulp hyperplasia and the presence of megakaryocytes, both of which are features of extramedullary hematopoiesis (EMH). EMH in the spleen was correlated with the presence of mature stress erythroid progenitors, suggesting that stress erythropoiesis is occurring to compensate for the BM microenvironmental irregularities. Our studies implicate that HIF-driven alterations in skeletal homeostasis can accelerate erythropoiesis.\n                <\/jats:p>\n                <jats:sec>\n                  <jats:title>Key Points<\/jats:title>\n                  <jats:p>\u2022 Dysregulation of HIF signaling in Dmp1+ bone cells induces stress erythropoiesis.<\/jats:p>\n                  <jats:p>\u2022 Skeletal homeostasis modulates erythropoiesis.<\/jats:p>\n                <\/jats:sec>","DOI":"10.1101\/2023.07.25.550559","type":"posted-content","created":{"date-parts":[[2023,7,28]],"date-time":"2023-07-28T15:15:22Z","timestamp":1690557322000},"source":"Crossref","is-referenced-by-count":1,"title":["Vhl deletion in\n                  <i>Dmp1<\/i>\n                  -expressing cells alters MEP metabolism and promotes stress erythropoiesis"],"prefix":"10.64898","author":[{"given":"Janna M.","family":"Emery","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Betsabel","family":"Chicana","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hanna","family":"Taglinao","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Citlaly","family":"Ponce","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Cristine","family":"Donham","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hawa","family":"Padmore","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Aimy","family":"Sebastian","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Scott L.","family":"Trasti","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jennifer O.","family":"Manilay","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"54368","reference":[{"key":"2023073112001292000_2023.07.25.550559v1.1","doi-asserted-by":"crossref","unstructured":"Swaminathan A , Hwang Y , Winward A , Socolovsky M . 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