title: Hemoglobin-stimulated growth and antioxidant activities in cultured cotton cells.
abstract: Changes in cellular reactive oxygen scavenging enzymes were assessed in suspension-derived cells of cotton (Gossypium herbaceum) cv. Dhumad following culture with a commercial bovine hemoglobin (Hb) solution (Erythrogen) at 1:100-1:1000 (v:v). Mean (+/- SEM) fresh (f.wt.) and dry weights (d.wt.) of cells after 25 d of culture were significantly (p <.05) greater in medium supplemented with 1:750 and 1:1000 (v:v) Erythrogen, compared to controls lacking Erythrogen. For example, with 1:750 (v:v) Erythrogen, mean cell f.wt. and d.wt. were increased by 45 and 31%, respectively. Total soluble cellular protein increased by 141, 176, and 191% with Erythrogen at 1:50, 1:750, and 1:1000 (v:v), respectively. Cellular catalase and glutathione reductase activities decreased significantly (p <.05) following addition of low concentrations (1:1000 and 1:750 v:v) of Erythrogen to culture medium. However, increasing the concentration of Erythrogen to a maximum of 1:100 (v:v), caused a concomitant increase in catalase to a maximum of 62% over control. Mean total superoxide dismutase activity increased linearly with increasing Erythrogen concentration, reaching a maximum mean value over 2-fold greater than control with 1:100 (v:v) Erythrogen. A similar trend was observed in cellular H2O2 content, which reached a maximum of 98% over control with 1:250 (v:v) Erythrogen. These results demonstrate that culture of cotton cells with Hb solution causes changes in cellular oxygenation sufficient to modify cellular antioxidant status.
authors.affiliation: School of Biosciences, University of Nottingham, Nottingham, UK.
authors.forename: L C
authors.initials: LC
authors.lastname: Garratt
authors.forename: B S
authors.initials: BS
authors.lastname: Janagoudar
authors.forename: P
authors.initials: P
authors.lastname: Anthony
authors.forename: M R
authors.initials: MR
authors.lastname: Davey
authors.forename: J B
authors.initials: JB
authors.lastname: Power
authors.forename: K C
authors.initials: KC
authors.lastname: Lowe
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000378:metabolism*; D002374:Catalase / Q000378:metabolism; D002417:Cattle; D018929:Cell Culture Techniques / Q000379:methods; D002455:Cell Division / Q000187:drug effects; D002478:Cells, Cultured; D003470:Culture Media; D005980:Glutathione Reductase / Q000378:metabolism; D003368:Gossypium / Q000166:cytology* / Q000187:drug effects / Q000201:enzymology; D006454:Hemoglobins / Q000494:pharmacology*; D006861:Hydrogen Peroxide / Q000378:metabolism; D013482:Superoxide Dismutase / Q000378:metabolism
chemical_list: D000975:Antioxidants; D003470:Culture Media; D006454:Hemoglobins; C446559:erythrogen; D006861:Hydrogen Peroxide; D002374:Catalase; D013482:Superoxide Dismutase; D005980:Glutathione Reductase