title: Nucleoside-nucleotide mixture increases bone marrow cell number and small intestinal RNA content in protein-deficient mice after an acute bacterial infection.
abstract: The aim of this study was to determine if intraperitoneal administration of a nucleoside-nucleotide mixture would affect small intestinal morphology, bone marrow cell number, and DNA content in protein-deficient mice subjected to acute bacterial infection. Mice were randomized into two groups and orally fed protein-free diet or nucleotide-free 20% casein diet for 10 d. The mice in each group were divided into two subgroups and intraperitoneally administered 0.35 mL saline or nucleoside-nucleotide mixture (17.5 mL/kg body weight) for 10 d. On day 10, one subgroup from each major dietary group was either inoculated intravenously with methicillin-resistant Staphylococcus aureus or saline. Three days later, small intestinal morphology, bone marrow cell number, and DNA content were evaluated in infected and noninfected mice. Protein-deficiency in association with infection significantly (P < 0.05) reduced body weight, small intestinal weight, crypt depth, villous height, and wall thickness. All dietary groups exhibited similar small intestinal DNA and protein contents (protein:DNA ratio, RNA:DNA ratio) at 3 d postinfection. However, small intestinal RNA content in the infected protein-free dietary group administered nucleoside-nucleotide mixture was higher (P < 0.05) and tended to be higher relative to the infected nucleotide-free 20% casein group administered nucleoside-nucleotide mixture compared with the rest of the groups. In the infected protein-free dietary group administered nucleoside-nucleotide mixture, bone marrow cell number and bone marrow DNA content were higher (P < 0.05) relative to the infected protein-free dietary group, nucleotide-free 20% casein diet administered saline, or nucleoside-nucleotide mixture, respectively. We conclude that intraperitoneal administration of nucleoside-nucleotide mixture may stimulate bone marrow cell proliferation, DNA content, and small intestinal RNA content during periods of relative deficiency such as protein-deficiency in combination with infection.
authors.affiliation: Research Center of Comprehensive Medicine, Department of Nutrition, Faculty of Medicine, University of the Ryukyus, Okinawa, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Yamauchi
authors.forename: A A
authors.initials: AA
authors.lastname: Adjei
authors.forename: C K
authors.initials: CK
authors.lastname: Ameho
authors.forename: S
authors.initials: S
authors.lastname: Sato
authors.forename: K
authors.initials: K
authors.lastname: Okamoto
authors.forename: S
authors.initials: S
authors.lastname: Kakinohana
authors.forename: S
authors.initials: S
authors.lastname: Yamamoto
mesh_terms: D000818:Animals; D001424:Bacterial Infections / Q000150:complications*; D001854:Bone Marrow Cells; D002452:Cell Count; D002455:Cell Division; D004247:DNA / Q000378:metabolism; D004032:Diet; D004044:Dietary Proteins / Q000008:administration & dosage; D007421:Intestine, Small / Q000378:metabolism*; D051379:Mice; D008807:Mice, Inbred BALB C; D009705:Nucleosides / Q000008:administration & dosage* / Q000627:therapeutic use; D009711:Nucleotides / Q000008:administration & dosage* / Q000627:therapeutic use; D011488:Protein Deficiency / Q000150:complications / Q000628:therapy*; D012313:RNA / Q000378:metabolism
chemical_list: D004044:Dietary Proteins; D009705:Nucleosides; D009711:Nucleotides; D012313:RNA; D004247:DNA