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GLUT1 and GLUT8 support lactose synthesis in Golgi of murine mammary epithelial cells

The mammary gland increases energy requirements during pregnancy and lactation to support epithelial proliferation and milk nutrients synthesis. Lactose, the principal carbohydrate of the milk, is synthetized in the Golgi of mammary epithelial cells by lactose synthase from glucose and UPD galactose...

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Published in:Journal of physiology and biochemistry 2019-06, Vol.75 (2), p.209-215
Main Authors: Villagrán, Marcelo, Muñoz, Mirna, Inostroza, Eveling, Venegas, Camila, Ruminot, Iván, Parra-Valencia, Esteban, Maldonado, Mafalda, del Pozo, Reginald, Rivas, Coralia I., Vera, Juan Carlos, Mardones, Lorena
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Muñoz, Mirna
Inostroza, Eveling
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del Pozo, Reginald
Rivas, Coralia I.
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description The mammary gland increases energy requirements during pregnancy and lactation to support epithelial proliferation and milk nutrients synthesis. Lactose, the principal carbohydrate of the milk, is synthetized in the Golgi of mammary epithelial cells by lactose synthase from glucose and UPD galactose. We studied the temporal changes in the expression of GLUT1 and GLUT8 in mammary gland and their association with lactose synthesis and proliferation in BALB/c mice. Six groups were used: virgin, pregnant at 2 and 17 days, lactating at 2 and 10 days, and weaning at 2 days. Temporal expression of GLUT1 and GLUT8 transporters by qPCR, western blot and immunohistochemistry, and its association with lactalbumin, Ki67, and cytokeratin 18 within mammary tissue was studied, along with subcellular localization. GLUT1 and GLUT8 transporters increased their expression during mammary gland progression, reaching 20-fold increasing in GLUT1 mRNA at lactation ( p  
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Lactose, the principal carbohydrate of the milk, is synthetized in the Golgi of mammary epithelial cells by lactose synthase from glucose and UPD galactose. We studied the temporal changes in the expression of GLUT1 and GLUT8 in mammary gland and their association with lactose synthesis and proliferation in BALB/c mice. Six groups were used: virgin, pregnant at 2 and 17 days, lactating at 2 and 10 days, and weaning at 2 days. Temporal expression of GLUT1 and GLUT8 transporters by qPCR, western blot and immunohistochemistry, and its association with lactalbumin, Ki67, and cytokeratin 18 within mammary tissue was studied, along with subcellular localization. GLUT1 and GLUT8 transporters increased their expression during mammary gland progression, reaching 20-fold increasing in GLUT1 mRNA at lactation ( p  &lt; 0.05) and 2-fold at protein level for GLUT1 and GLUT8 ( p  &lt; 0.05 and 0.01, respectively). The temporal expression pattern was shared with cytokeratin 18 and Ki67 ( p  &lt; 0.01). Endogenous GLUT8 partially co-localized with 58 K protein and α-lactalbumin in mammary tissue and with Golgi membrane–associated protein 130 in isolated epithelial cells. The spatial-temporal synchrony between expression of GLUT8/GLUT1 and alveolar cell proliferation, and its localization in cis- Golgi associated to lactose synthase complex, suggest that both transporters are involved in glucose uptake into this organelle, supporting lactose synthesis.</description><identifier>ISSN: 1138-7548</identifier><identifier>EISSN: 1877-8755</identifier><identifier>DOI: 10.1007/s13105-019-00679-3</identifier><identifier>PMID: 31020623</identifier><language>eng</language><publisher>Dordrecht: Springer Netherlands</publisher><subject>Alveoli ; Animal Physiology ; Animals ; Biomedical and Life Sciences ; Biomedicine ; Breastfeeding &amp; lactation ; Carbohydrates ; Cell proliferation ; Cytokeratin ; Energy requirements ; Epithelial cells ; Epithelial Cells - immunology ; Epithelial Cells - metabolism ; Female ; Galactose ; Gene expression ; Glucose ; Glucose - metabolism ; Glucose Transport Proteins, Facilitative - genetics ; Glucose Transport Proteins, Facilitative - metabolism ; Glucose Transporter Type 1 - genetics ; Glucose Transporter Type 1 - metabolism ; Golgi Apparatus - metabolism ; Golgi cells ; Human Physiology ; Immunohistochemistry ; K protein ; Keratin-18 - metabolism ; Lactalbumin ; Lactalbumin - metabolism ; Lactation ; Lactose ; Lactose - biosynthesis ; Lactose synthase ; Lactose Synthase - metabolism ; Localization ; Mammary gland ; Mammary glands ; Mammary Glands, Animal - metabolism ; Membrane proteins ; Mice ; Mice, Inbred BALB C ; mRNA ; Nutrients ; Original Article ; Peptides - metabolism ; Pregnancy ; Protein folding ; Proteins ; Retinoblastoma-Like Protein p130 - metabolism ; RNA, Messenger - metabolism ; Synthesis ; Time Factors ; Underpotential deposition ; Weaning</subject><ispartof>Journal of physiology and biochemistry, 2019-06, Vol.75 (2), p.209-215</ispartof><rights>University of Navarra 2019</rights><rights>Copyright Springer Nature B.V. 2019</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c375t-4a7e5c5c73cd01c7ff51e592a34ce524d82beef7e682f9b70ad499672ab7af5a3</citedby><cites>FETCH-LOGICAL-c375t-4a7e5c5c73cd01c7ff51e592a34ce524d82beef7e682f9b70ad499672ab7af5a3</cites><orcidid>0000-0001-8037-4296</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27903,27904</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/31020623$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Villagrán, Marcelo</creatorcontrib><creatorcontrib>Muñoz, Mirna</creatorcontrib><creatorcontrib>Inostroza, Eveling</creatorcontrib><creatorcontrib>Venegas, Camila</creatorcontrib><creatorcontrib>Ruminot, Iván</creatorcontrib><creatorcontrib>Parra-Valencia, Esteban</creatorcontrib><creatorcontrib>Maldonado, Mafalda</creatorcontrib><creatorcontrib>del Pozo, Reginald</creatorcontrib><creatorcontrib>Rivas, Coralia I.</creatorcontrib><creatorcontrib>Vera, Juan Carlos</creatorcontrib><creatorcontrib>Mardones, Lorena</creatorcontrib><title>GLUT1 and GLUT8 support lactose synthesis in Golgi of murine mammary epithelial cells</title><title>Journal of physiology and biochemistry</title><addtitle>J Physiol Biochem</addtitle><addtitle>J Physiol Biochem</addtitle><description>The mammary gland increases energy requirements during pregnancy and lactation to support epithelial proliferation and milk nutrients synthesis. Lactose, the principal carbohydrate of the milk, is synthetized in the Golgi of mammary epithelial cells by lactose synthase from glucose and UPD galactose. We studied the temporal changes in the expression of GLUT1 and GLUT8 in mammary gland and their association with lactose synthesis and proliferation in BALB/c mice. Six groups were used: virgin, pregnant at 2 and 17 days, lactating at 2 and 10 days, and weaning at 2 days. Temporal expression of GLUT1 and GLUT8 transporters by qPCR, western blot and immunohistochemistry, and its association with lactalbumin, Ki67, and cytokeratin 18 within mammary tissue was studied, along with subcellular localization. GLUT1 and GLUT8 transporters increased their expression during mammary gland progression, reaching 20-fold increasing in GLUT1 mRNA at lactation ( p  &lt; 0.05) and 2-fold at protein level for GLUT1 and GLUT8 ( p  &lt; 0.05 and 0.01, respectively). The temporal expression pattern was shared with cytokeratin 18 and Ki67 ( p  &lt; 0.01). Endogenous GLUT8 partially co-localized with 58 K protein and α-lactalbumin in mammary tissue and with Golgi membrane–associated protein 130 in isolated epithelial cells. 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The temporal expression pattern was shared with cytokeratin 18 and Ki67 ( p  &lt; 0.01). Endogenous GLUT8 partially co-localized with 58 K protein and α-lactalbumin in mammary tissue and with Golgi membrane–associated protein 130 in isolated epithelial cells. The spatial-temporal synchrony between expression of GLUT8/GLUT1 and alveolar cell proliferation, and its localization in cis- Golgi associated to lactose synthase complex, suggest that both transporters are involved in glucose uptake into this organelle, supporting lactose synthesis.</abstract><cop>Dordrecht</cop><pub>Springer Netherlands</pub><pmid>31020623</pmid><doi>10.1007/s13105-019-00679-3</doi><tpages>7</tpages><orcidid>https://orcid.org/0000-0001-8037-4296</orcidid></addata></record>
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ispartof Journal of physiology and biochemistry, 2019-06, Vol.75 (2), p.209-215
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source Springer Nature
subjects Alveoli
Animal Physiology
Animals
Biomedical and Life Sciences
Biomedicine
Breastfeeding & lactation
Carbohydrates
Cell proliferation
Cytokeratin
Energy requirements
Epithelial cells
Epithelial Cells - immunology
Epithelial Cells - metabolism
Female
Galactose
Gene expression
Glucose
Glucose - metabolism
Glucose Transport Proteins, Facilitative - genetics
Glucose Transport Proteins, Facilitative - metabolism
Glucose Transporter Type 1 - genetics
Glucose Transporter Type 1 - metabolism
Golgi Apparatus - metabolism
Golgi cells
Human Physiology
Immunohistochemistry
K protein
Keratin-18 - metabolism
Lactalbumin
Lactalbumin - metabolism
Lactation
Lactose
Lactose - biosynthesis
Lactose synthase
Lactose Synthase - metabolism
Localization
Mammary gland
Mammary glands
Mammary Glands, Animal - metabolism
Membrane proteins
Mice
Mice, Inbred BALB C
mRNA
Nutrients
Original Article
Peptides - metabolism
Pregnancy
Protein folding
Proteins
Retinoblastoma-Like Protein p130 - metabolism
RNA, Messenger - metabolism
Synthesis
Time Factors
Underpotential deposition
Weaning
title GLUT1 and GLUT8 support lactose synthesis in Golgi of murine mammary epithelial cells
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