Weight gain and maternal behavior in CCK1 deficient rats

M. Schroeder; O. Zagoory–Sharon; Y. Lavi-Avnon; T.H. Moran; A. Weller

Weight gain and maternal behavior in CCK1 deficient rats

M. Schroeder, O. Zagoory–Sharon, Y. Lavi-Avnon, T.H. Moran, A. Weller

Department of Psychology

Research output: Contribution to journal › Article › peer-review

Abstract

The OLETF rat model of obesity has been extensively studied as an adult model of hyperphagia-induced obesity. In order to better understand the early circumstances that make OLETF pups obese, we investigated body weight from postnatal day (PND) 1 and examined diurnal maternal behavior over the first three postpartum weeks by undisturbed observations. Male and female OLETF rats weighed significantly more than LETO controls from PND 1 until adulthood. Differences in nursing behavior were observed only in the third postnatal week: OLETF dams exhibited more frequent nursing. OLETF dams displayed less self-directed behaviors and activity, over the entire postpartum period examined. Taken together, these data demonstrate that OLETF males and females are heavier from birth and suggest that maternal factors may contribute to weight differences between the strains.

Original language	American English
Pages (from-to)	402-409
Journal	Physiology and Behavior
Volume	89
State	Published - 2006

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title = "Weight gain and maternal behavior in CCK1 deficient rats",

abstract = "The OLETF rat model of obesity has been extensively studied as an adult model of hyperphagia-induced obesity. In order to better understand the early circumstances that make OLETF pups obese, we investigated body weight from postnatal day (PND) 1 and examined diurnal maternal behavior over the first three postpartum weeks by undisturbed observations. Male and female OLETF rats weighed significantly more than LETO controls from PND 1 until adulthood. Differences in nursing behavior were observed only in the third postnatal week: OLETF dams exhibited more frequent nursing. OLETF dams displayed less self-directed behaviors and activity, over the entire postpartum period examined. Taken together, these data demonstrate that OLETF males and females are heavier from birth and suggest that maternal factors may contribute to weight differences between the strains.",

author = "M. Schroeder and O. Zagoory–Sharon and Y. Lavi-Avnon and T.H. Moran and A. Weller",

year = "2006",

language = "American English",

volume = "89",

pages = "402--409",

journal = "Physiology and Behavior",

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T1 - Weight gain and maternal behavior in CCK1 deficient rats

AU - Schroeder, M.

AU - Zagoory–Sharon, O.

AU - Lavi-Avnon, Y.

AU - Moran, T.H.

AU - Weller, A.

PY - 2006

Y1 - 2006

N2 - The OLETF rat model of obesity has been extensively studied as an adult model of hyperphagia-induced obesity. In order to better understand the early circumstances that make OLETF pups obese, we investigated body weight from postnatal day (PND) 1 and examined diurnal maternal behavior over the first three postpartum weeks by undisturbed observations. Male and female OLETF rats weighed significantly more than LETO controls from PND 1 until adulthood. Differences in nursing behavior were observed only in the third postnatal week: OLETF dams exhibited more frequent nursing. OLETF dams displayed less self-directed behaviors and activity, over the entire postpartum period examined. Taken together, these data demonstrate that OLETF males and females are heavier from birth and suggest that maternal factors may contribute to weight differences between the strains.

AB - The OLETF rat model of obesity has been extensively studied as an adult model of hyperphagia-induced obesity. In order to better understand the early circumstances that make OLETF pups obese, we investigated body weight from postnatal day (PND) 1 and examined diurnal maternal behavior over the first three postpartum weeks by undisturbed observations. Male and female OLETF rats weighed significantly more than LETO controls from PND 1 until adulthood. Differences in nursing behavior were observed only in the third postnatal week: OLETF dams exhibited more frequent nursing. OLETF dams displayed less self-directed behaviors and activity, over the entire postpartum period examined. Taken together, these data demonstrate that OLETF males and females are heavier from birth and suggest that maternal factors may contribute to weight differences between the strains.

UR - http://www.sciencedirect.com/science/article/pii/S0031938406002988

M3 - Article

SN - 0031-9384

VL - 89

SP - 402

EP - 409

JO - Physiology and Behavior

JF - Physiology and Behavior

ER -

Weight gain and maternal behavior in CCK1 deficient rats

Abstract

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