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1996 Fiscal Year Final Research Report Summary

Prediction of The Marbled Beef Quality before Fattening up Japanese Black Cattle

Research Project

Project/Area Number 07556022
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section試験
Research Field 応用微生物学・応用生物化学
Research InstitutionNAGOYA UNIVERSITY

Principal Investigator

KITAGAWA Yasuo  Nagoya University BioScience Center Professor, 生物分子応答研究センター, 教授 (50101168)

Co-Investigator(Kenkyū-buntansha) TANIGUCHI Yukio  Kyoto University Faculty of Agriculture Research Associate, 農学部, 助手 (10252496)
MIKI Kiyoshi  Nagoya University BioScience ceter Research Associate, 生物分子応答研究センター, 助手 (30212228)
SASAKI Yoshiyuki  Kyoto University Faculty of Agriculture Professor, 農学部, 教授 (10041013)
Project Period (FY) 1995 – 1996
KeywordsJapanese black cattle / marbled beef / adipocyte / mesenchymal stem cell / C / EBP / muscle fiber / immunohistochemistry / reconstituted basement membrane
Research Abstract

The marbled beef (Shimofuri-niku)is a highly appreciated livestock product in Japan, in which muscle fibers are interpositioned with fine adipose tissues. Because of its soft and juicy texture, the marbled beef is dealt at higher price than usual beef. For the production of marbled beef, farmers spend a large effort and money to fatten up calves having good genetic background. Since the exact mechanism of such adipose tissue formation in muscle fibers is not known, the quality of marbeled beef varies widely amoung calves beleived to have good genetic background. Prediction of the beef quality before fattening up calves is an important technology for the stockbreeders in Japan.
Adipocytes belong to the mesenchymal cell lineage together with osteocytes, chondrocytes and smooth muscle cells, and differentiate from a common stem cells in connective tissue depending on the microenvironment. Many cell lines with the potential of mesenchymal stem cell have been established and 3T3 F442A is one … More of such cell lines. In this study, we first found that transplantation of in vitro cultured 3T3 F442A cells subcutaneously into nude mice forms a fat pad in which well differentiated adipocytes are delivered with abundant micro-capillaries. The growth factors such as bFGF,PDGF,IGF-1 and growth hormone stimulated this fat pad formation but injection of those growth factor alone did not induce fat pad. When these growth factors were injected in combination with the reconstitutted basement membrane components(Matrigel), however, well developed fad pad was formed in the absence of exogenous precursor cells. This shows that growth factors are trapped in the reconstituted basement membrane and this creates a microenvironment where the mesenchymal stem cells proliferate and differentiate into adipocytes. bFGF in combination with Matrigel induced the pads composed of only adipocytes but growth hormone in combination with Matrigel induced the pads composed of only adipocytes but growth hormone in combination with Matrigel induced muscle fibers together with adipocytes. This suggested a new technology of inducing marbled beef at desired site of Japanese black cattle. We have cloned bovine C/EBPalpha, C/EBPbeta, C/EBPgamma and PRAYgamma2 genes and obtained polyclonal antibodies against their recombinant products. These genes encodes transacting factors deeply related to the genetic control of adipocyte differentiation and are expressed at early stage of adipose tissue formation. We also established immunohistochemical method to detect adipocyte presursors in calves before fattening up for the prodution of marbled beef. Less

  • Research Products

    (14 results)

All Other

All Publications (14 results)

  • [Publications] Kawaguchi,N.et al.: "In vivo formation of adipose tissue by transplanting precursor cells." Animal Cell Technology: Basic & Applied Aspects. 8. 235-238 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Taniguchi,Y.and Sakaki,Y.: "Nucleotide Sequence of Borine C/EBP α Gene." J. Anim. Sci.74(10). 2554-2554 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kitagawa,Y.et al.: "De rovo formation in anice of adipose tissue and muscle fibers at the site of injecting Matngel" Animal Cell Technology: Proceeding of the 14th Mceting of the Europen Saiety for.607-611 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yamaoka,I.et al.: "Nucleotide Sequence of Bovine C/EBP β Gere." J. Anim. Sci. (in press). (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Taniguchi,Y.and Sasaki,Y.: "Nucleotide Sequance of Bovire C/EBP γ Gene" J. Anim. Sci. (in press). (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Taniguchi,Y.et al.: "Cloning and characterization of C/EBP family genes." The 8th AAAP Animal Science Congress, Proaeding, 2. 2. 430-431 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kawaguchi, N., Toriyama, K., Torii, S., and Kitagawa, Y: "In vivo formation of adipose tissue by transplanting precursor cells." Animal Cell Technology : Basic & Applied Aspects. 8. 235-238 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Taniguchi, Y., and Y.sasaki: "Rapid Communication : Nucleotide Sequence of Bovine C/EBPalpha Gene" J .Anim.Sci.74(10). 2554-2554 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kitagawa, Y., Kawaguchi, N., Toriyama, K., and Torii, S: "De novo formation in mice of adipose tissue and muscle fibers at the site of injecting Matrigel and growth factors." Animal cell Cell Technology : Procesesing of the 14th Meeting of the European Society for Animal Cell technology. 607-611 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yamaoka, I., Taniguchi, Y., and Sasaki, Y.: "Rapid Communication : Nucleotide Sequence of Bovine C/EBPbeta Gene" J.Anim.Sci.(in press). (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Taniguchi, Y., and Sasaki, Y.: "Rapid Communication : Nucleotide Sequence of Bovine C/EBPgamma Gene" J.Anim.Sci.(in press). (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Taniguchi, Y., Yamaoka, I., and Sasaki, Y.: "Cloning and characterization of C/EBP family genes" The 8th AAAP Animal Science Congress, proceeding.2. 430-431 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kawaguchi, N., Nicodemou-Lwna, E., Toriyama, K., Torii, S., and Kitagawa, Y.: "Matricrine effect of basement membrance components on de novo fromation of mesenchymal tissue." Animal Cell Technlogy : Basic & Applied Aspects.(in press). (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Niimi, T., and Kitagawa, Y.: "Expression of laminin alpha4 mRNA in mouse 3T3-L1 cells" Matrix Biology. (in press). (1997)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-03-09  

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