Literature DB >> 1269848

Activity of pyruvate dehydrogenase complex in the mammary gland of normal and diabetic rats.

K F Kankel, H Reinauer.   

Abstract

After parturition there is a 10 fold increase in the actual and total activity of the PDH complex in the mammary gland, which can be explained by an increased amount of enzyme protein. There is a marked difference between the activity state of the PDH complex in the suckled and unsuckled gland of the same animals. In fasting rats the active form of the PDH complex is decreased. This effect is further enhanced by inhibition of suckling. In the diabetic state the PDHa activity is reduced, but the change is statistically insignificant. The decreased milk production during diabetes results from the reduction of the total mass of gland. The total activity of the PDH complex is the same in fetal and neonatal liver of the rat. Whereas the PDH complex is fully activated before parturition, there is a significant decrease in the active form of the pyruvate dehydrogenase complex in the liver of the newborn rats.

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Year:  1976        PMID: 1269848     DOI: 10.1007/BF00428981

Source DB:  PubMed          Journal:  Diabetologia        ISSN: 0012-186X            Impact factor:   10.122


  16 in total

1.  Function of calcium ions in pyruvate dehydrogenase phosphatase activity.

Authors:  F H Pettit; T E Roche; L J Reed
Journal:  Biochem Biophys Res Commun       Date:  1972-10-17       Impact factor: 3.575

2.  Pyruvate dehydrogenase, the citrate condensing enzyme and the utilization of 14 C-labeled lactate, pyruvate and alanine by slices of lactating mammary gland and adenocarcinoma of mouse mammary gland.

Authors:  L Kopelovich
Journal:  Proc Soc Exp Biol Med       Date:  1973-03

3.  Stimulation by calcium ions of pyruvate dehydrogenase phosphate phosphatase.

Authors:  R M Denton; P J Randle; B R Martin
Journal:  Biochem J       Date:  1972-06       Impact factor: 3.857

4.  Active and inactive forms of pyruvate dehydrogenase in rat heart and kidney: effect of diabetes, fasting, and refeeding on pyruvate dehydrogenase interconversion.

Authors:  O Wieland; E Siess; F H Schulze-Wethmar; H G von Funcke; B Winton
Journal:  Arch Biochem Biophys       Date:  1971-04       Impact factor: 4.013

5.  Proceedings: Regulation of the pyruvate dehydrogenase complex in mammary tissue of the rat.

Authors:  H Reinauer
Journal:  Hoppe Seylers Z Physiol Chem       Date:  1974-10

6.  [Changes in the activity of pyruvate dehydrogenase in thiamine deficiency].

Authors:  H Reinauer; G Grassow; S Hollmann
Journal:  Hoppe Seylers Z Physiol Chem       Date:  1968-08

7.  Adaptive changes in satellite systems related to lipogenesis in rat and sheep mammary gland and in adipose tissue.

Authors:  K A Gumaa; A L Greenbaum; P McLean
Journal:  Eur J Biochem       Date:  1973-04-02

8.  Calcium and magnesium ions as effectors of adipose-tissue pyruvate dehydrogenase phosphate phosphatase.

Authors:  D L Severson; R M Denton; H T Pask; P J Randle
Journal:  Biochem J       Date:  1974-05       Impact factor: 3.857

9.  Properties of pyruvate dehydrogenase of rat mammary tissue and its changes during pregnancy, lactation and weaning.

Authors:  H G Coore; B Field
Journal:  Biochem J       Date:  1974-07       Impact factor: 3.857

10.  Fatty acid biosynthesis in rabbit mammary gland during pregnancy and early lactation.

Authors:  C R Strong; R Dils
Journal:  Biochem J       Date:  1972-08       Impact factor: 3.857

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  13 in total

1.  Effects of acetoacetate administration on glucose metabolism in mammary gland of fed lactating rats.

Authors:  A M Robinson; D H Williamson
Journal:  Biochem J       Date:  1977-06-15       Impact factor: 3.857

2.  The mode of regulation of pyruvate dehydrogenase of lactating rat mammary gland. Effects of starvation and insulin.

Authors:  M A Baxter; H G Coore
Journal:  Biochem J       Date:  1978-08-15       Impact factor: 3.857

3.  Tissue-specific changes in the ability of insulin and noradrenaline to activate pyruvate dehydrogenase in vivo during lactation in the rat.

Authors:  E Kilgour; R G Vernon
Journal:  Biochem J       Date:  1987-04-01       Impact factor: 3.857

4.  Changes in the activity of 'active' pyruvate dehydrogenase complex in the newborn of normal and diabetic rats.

Authors:  C I Chitra; J M Cuezva; M S Patel
Journal:  Diabetologia       Date:  1985-03       Impact factor: 10.122

5.  Evidence for a role of insulin in the regulation of lipogenesis in lactating rat mammary gland. Measurements of lipogenesis in vivo and plasma hormone concentrations in response to starvation and refeeding.

Authors:  A M Robinson; J R Girard; D H Williamson
Journal:  Biochem J       Date:  1978-10-15       Impact factor: 3.857

6.  Insulin activation of lipogenesis in isolated mammary acini from lactating rats fed on a high-fat diet. Evidence that acetyl-CoA carboxylase is a site of action.

Authors:  M R Munday; D H Williamson
Journal:  Biochem J       Date:  1987-03-15       Impact factor: 3.857

7.  Comparison of glucose metabolism in the lactating mammary gland of the rat in vivo and in vitro. Effects of starvation, prolactin or insulin deficiency.

Authors:  A M Robinson; D H Williamson
Journal:  Biochem J       Date:  1977-04-15       Impact factor: 3.857

8.  Chain-length dependency of interactions of medium-chain fatty acids with glucose metabolism in acini isolated from lactating rat mammary glands. A putative feed-back to control milk lipid synthesis from glucose.

Authors:  K J Heesom; P F Souza; V Ilic; D H Williamson
Journal:  Biochem J       Date:  1992-01-01       Impact factor: 3.857

9.  Utilization of L-alanine and L-glutamine by lactating mammary gland of the rat. A role for L-alanine as a lipogenic precursor.

Authors:  J R Viña; D H Williamson
Journal:  Biochem J       Date:  1981-06-15       Impact factor: 3.857

10.  Evidence that the stimulation of lipogenesis in the mammary glands of starved lactating rats re-fed with a chow diet is dependent on continued hepatic gluconeogenesis during the absorptive period. Effects of a gluconeogenic inhibitory, mercaptopicolinic acid, in vivo.

Authors:  D H Williamson; V Ilic; R G Jones
Journal:  Biochem J       Date:  1985-06-15       Impact factor: 3.857

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