Maternal protein restriction regulates IGF2 system in placental labyrinth

Haijun Gao, Kunju Reddiar Sathishkumar, Uma Yallampalli, Meena Balakrishnan, Xilong Li, Guoyao Wu, Chandra Yallampalli

    Research output: Contribution to journalArticle

    20 Citations (Scopus)

    Abstract

    This study was to test the hypothesis that altered IGF2 system in the placental labyrinth zone (LZ) impairs feto-placental growth in response to maternal protein restriction. Rats were fed a 20% protein diet and an isocaloric 6% protein diet (LP) from day 1 to days 14, 18, or 21 of pregnancy. The effects of diet, gender of placenta and fetus, and day of pregnancy on placental weight, fetal weight, and expression of the IGF2 axis in the placental LZ and amino acids in maternal plasma were analyzed. Growth restriction occurred in both female and male fetuses by LP, coincident with impaired LZ growth and efficiency. The expression of Igf2, Igf2P0, Igf1r, Igf2r, Insr, Igfbp1, and Igfbp2 in placental LZ were affected by diet, gender and/or day of pregnancy. Concentrations of total essential amino acids and total nonessential amino acids were reduced and increased, respectively, in maternal plasma of LP-fed rats. These results indicate that adaptation of the IGF2 system in rat LZ occurs in a sex- and time-dependent manner in response to maternal protein restriction; however, these adaptations cannot prevent the growth restriction of both male and female fetuses during late pregnancy.

    Original languageEnglish (US)
    Pages (from-to)1434-1450
    Number of pages17
    JournalFrontiers in Bioscience - Elite
    Volume4 E
    Issue number4
    StatePublished - Jan 1 2012

    Fingerprint

    Inner Ear
    Nutrition
    Mothers
    Rats
    Diet
    Pregnancy
    Fetus
    Growth
    Proteins
    Plasmas
    Amino Acids
    Essential Amino Acids
    Fetal Weight
    Placenta
    Weights and Measures

    Keywords

    • Fetal Growth
    • Gene Expression
    • IGF2
    • IGF2P0
    • IGFBP
    • Labyrinth Zone
    • Placenta
    • Pregnancy
    • Protein Restriction

    ASJC Scopus subject areas

    • Biochemistry, Genetics and Molecular Biology(all)
    • Immunology and Microbiology(all)
    • Medicine(all)

    Cite this

    Gao, H., Sathishkumar, K. R., Yallampalli, U., Balakrishnan, M., Li, X., Wu, G., & Yallampalli, C. (2012). Maternal protein restriction regulates IGF2 system in placental labyrinth. Frontiers in Bioscience - Elite, 4 E(4), 1434-1450.

    Maternal protein restriction regulates IGF2 system in placental labyrinth. / Gao, Haijun; Sathishkumar, Kunju Reddiar; Yallampalli, Uma; Balakrishnan, Meena; Li, Xilong; Wu, Guoyao; Yallampalli, Chandra.

    In: Frontiers in Bioscience - Elite, Vol. 4 E, No. 4, 01.01.2012, p. 1434-1450.

    Research output: Contribution to journalArticle

    Gao, H, Sathishkumar, KR, Yallampalli, U, Balakrishnan, M, Li, X, Wu, G & Yallampalli, C 2012, 'Maternal protein restriction regulates IGF2 system in placental labyrinth', Frontiers in Bioscience - Elite, vol. 4 E, no. 4, pp. 1434-1450.
    Gao H, Sathishkumar KR, Yallampalli U, Balakrishnan M, Li X, Wu G et al. Maternal protein restriction regulates IGF2 system in placental labyrinth. Frontiers in Bioscience - Elite. 2012 Jan 1;4 E(4):1434-1450.
    Gao, Haijun ; Sathishkumar, Kunju Reddiar ; Yallampalli, Uma ; Balakrishnan, Meena ; Li, Xilong ; Wu, Guoyao ; Yallampalli, Chandra. / Maternal protein restriction regulates IGF2 system in placental labyrinth. In: Frontiers in Bioscience - Elite. 2012 ; Vol. 4 E, No. 4. pp. 1434-1450.
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