PMID- 11376107 OWN - NLM STAT- MEDLINE DCOM- 20010816 LR - 20211203 IS - 0888-8809 (Print) IS - 0888-8809 (Linking) VI - 15 IP - 6 DP - 2001 Jun TI - Mammary gland involution is delayed by activated Akt in transgenic mice. PG - 867-81 AB - Activation of the antiapoptotic protein kinase Akt is induced by a number of growth factors that regulate mammary gland development. Akt is expressed during mammary gland development, and expression decreases at the onset of involution. To address Akt actions in mammary gland development, transgenic mice were generated expressing constitutively active Akt in the mammary gland under the control of the mouse mammary tumor virus (MMTV) promoter. Analysis of mammary glands from these mice reveals a delay in both involution and the onset of apoptosis. Expression of tissue inhibitor of metalloproteinase-1 (TIMP-1), an inhibitor of matrix metalloproteinases (MMPs), is prolonged and increased in the transgenic mice, suggesting that disruption of the MMP:TIMP ratio may contribute to the delayed mammary gland involution observed in the transgenic mice. FAU - Schwertfeger, K L AU - Schwertfeger KL AD - Program in Molecular Biology, University of Colorado Health Sciences Center, 4200 East Ninth Avenue, Denver, CO 80262, USA. FAU - Richert, M M AU - Richert MM FAU - Anderson, S M AU - Anderson SM LA - eng GR - CA-085736/CA/NCI NIH HHS/United States GR - CA-46934/CA/NCI NIH HHS/United States GR - DK-48845/DK/NIDDK NIH HHS/United States GR - DK-53858/DK/NIDDK NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Mol Endocrinol JT - Molecular endocrinology (Baltimore, Md.) JID - 8801431 RN - 0 (Caseins) RN - 0 (DNA-Binding Proteins) RN - 0 (Milk Proteins) RN - 0 (Proto-Oncogene Proteins) RN - 0 (STAT3 Transcription Factor) RN - 0 (STAT5 Transcription Factor) RN - 0 (Stat3 protein, mouse) RN - 0 (Tissue Inhibitor of Metalloproteinase-1) RN - 0 (Trans-Activators) RN - 0 (whey acidic proteins) RN - EC 2.7.11.1 (Protein Serine-Threonine Kinases) RN - EC 2.7.11.1 (Proto-Oncogene Proteins c-akt) RN - EC 3.4.24.17 (Matrix Metalloproteinase 3) SB - IM MH - Animals MH - *Apoptosis MH - Caseins/genetics/metabolism MH - DNA-Binding Proteins/genetics/metabolism MH - Female MH - Immunoblotting MH - Lactation/physiology MH - Mammary Glands, Animal/cytology/*physiology MH - Mammary Tumor Virus, Mouse/genetics/metabolism MH - Matrix Metalloproteinase 3/genetics/metabolism MH - Mice MH - Mice, Transgenic MH - Microscopy, Fluorescence MH - Milk Proteins/genetics/metabolism MH - Phosphorylation MH - Protein Serine-Threonine Kinases/*metabolism MH - Proto-Oncogene Proteins/genetics/*metabolism MH - Proto-Oncogene Proteins c-akt MH - STAT3 Transcription Factor MH - STAT5 Transcription Factor MH - Tissue Inhibitor of Metalloproteinase-1/genetics/metabolism MH - Trans-Activators/genetics/metabolism EDAT- 2001/05/29 10:00 MHDA- 2001/08/17 10:01 CRDT- 2001/05/29 10:00 PHST- 2001/05/29 10:00 [pubmed] PHST- 2001/08/17 10:01 [medline] PHST- 2001/05/29 10:00 [entrez] AID - 10.1210/mend.15.6.0663 [doi] PST - ppublish SO - Mol Endocrinol. 2001 Jun;15(6):867-81. doi: 10.1210/mend.15.6.0663.