Oxygen affinity of hemoglobin regulates O2 consumption, metabolism, and physical activity

Takuji Shirasawa, Masahiko Izumizaki, Yo Ichi Suzuki, Akihiko Ishihara, Takahiko Shimizu, Masakatsu Tamaki, Fei Huang, Ken Ichi Koizumi, Michiko Iwase, Hiromi Sakai, Eishun Tsuchida, Kenji Ueshima, Hiroshi Inoue, Haruhiko Koseki, Toshiya Senda, Takayuki Kuriyama, Ikuo Homma

Research output: Contribution to journalArticlepeer-review

52 Citations (Scopus)

Abstract

The oxygen affinity of hemoglobin is critical for gas exchange in the lung and O2 delivery in peripheral tissues. In the present study, we generated model mice that carry low affinity hemoglobin with the Titusville mutation in the α-globin gene or Presbyterian mutation in the β-globin gene. The mutant mice showed increased O2 consumption and CO2 production in tissue metabolism, suggesting enhanced O2 delivery by mutant Hbs. The histology of muscle showed a phenotypical conversion from a fast glycolytic to fast oxidative type. Surprisingly, mutant mice spontaneously ran twice as far as controls despite mild anemia. The oxygen affinity of hemoglobin may control the basal level of erythropoiesis, tissue O2 consumption, physical activity, and behavior in mice.

Original languageEnglish
Pages (from-to)5035-5043
Number of pages9
JournalJournal of Biological Chemistry
Volume278
Issue number7
DOIs
Publication statusPublished - 2003 Feb 14

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology

Fingerprint Dive into the research topics of 'Oxygen affinity of hemoglobin regulates O<sub>2</sub> consumption, metabolism, and physical activity'. Together they form a unique fingerprint.

Cite this