PMID- 27063575 OWN - NLM STAT- MEDLINE DCOM- 20170221 LR - 20220316 IS - 1095-8355 (Electronic) IS - 1065-6995 (Linking) VI - 40 IP - 7 DP - 2016 Jul TI - TGF-beta1 promotes bovine mammary fibroblast proliferation through the ERK 1/2 signalling pathway. PG - 750-60 LID - 10.1002/cbin.10609 [doi] AB - The abnormal proliferation of bovine mammary fibroblasts (BMFBs) impairs mammary gland development and lactation. Severe manifestations develop into breast fibrosis, leading to the culling of cows and causing serious losses to the dairy industry. Transforming growth factor beta1 (TGF-beta1) is an important modulator of cell proliferation and extracellular matrix formation; however, limited information is available on BMFBs. In this study, a convenient and stable culture method for BMFBs was established. Treatment with 5 ng/mL of TGF-beta1 significantly promoted the proliferation of BMFBs and accelerated the cell cycle. TGF-beta1 stimulation for up to 12 h significantly increased the relative ERK1/2 mRNA expression and enhanced the protein expression of p-ERK1/2 and cyclin D1. Conversely, the ERK1/2 inhibitor PD98059 blocked these TGF-beta1 effects. Further exploration using a mouse model showed that TGF-beta1 significantly increased the proportion of fibroblasts and accelerating the cell transition from the G1 to G2/M phases. In addition, TGF-beta1 enhanced the expression of fibrosis markers, alpha-SMA and I Collagen, which could be blocked efficiently by the PD98059 in mouse mammary gland. Finally, immunofluorescence analysis confirmed that TGF-beta1 promoted fibroblast proliferation in healthy dairy cows after normal long-term dietary corn straw roughage supplementation. It is suggested that the diet may promote mammary fibroblast proliferation by raising the level of TGF-beta1. Our study provides new insights into how nutrition causes undesirable changes in mammary gland structure. CI - (c) 2016 International Federation for Cell Biology. FAU - Gao, Yuanyuan AU - Gao Y AD - College of Animal Science, Jilin University, Changchun, Jilin, China. FAU - Wang, Yuping AU - Wang Y AD - College of Animal Science, Jilin University, Changchun, Jilin, China. FAU - Li, Yingying AU - Li Y AD - College of Animal Science, Jilin University, Changchun, Jilin, China. FAU - Xia, Xiaojing AU - Xia X AD - College of Veterinary Medicine, Jilin University, Xi'an Road 5333, Changchun, Jilin, China. FAU - Zhao, Shuang AU - Zhao S AD - College of Animal Science, Jilin University, Changchun, Jilin, China. FAU - Che, Yanyi AU - Che Y AD - College of Veterinary Medicine, Jilin University, Xi'an Road 5333, Changchun, Jilin, China. FAU - Sun, Yingying AU - Sun Y AD - College of Veterinary Medicine, Jilin University, Xi'an Road 5333, Changchun, Jilin, China. FAU - Lei, Liancheng AU - Lei L AD - College of Veterinary Medicine, Jilin University, Xi'an Road 5333, Changchun, Jilin, China. LA - eng PT - Journal Article DEP - 20160505 PL - England TA - Cell Biol Int JT - Cell biology international JID - 9307129 RN - 0 (Collagen Type I) RN - 0 (Transforming Growth Factor beta1) RN - 136601-57-5 (Cyclin D1) SB - IM MH - Animals MH - Cattle MH - Cattle Diseases/chemically induced/pathology MH - Cell Culture Techniques/methods/*veterinary MH - Cell Cycle/drug effects MH - Cell Division/drug effects MH - Cell Proliferation/drug effects MH - Collagen Type I/metabolism MH - Cyclin D1/metabolism MH - Extracellular Matrix/metabolism MH - Female MH - Fibroblasts/*drug effects/enzymology/metabolism/pathology MH - Fibrosis/chemically induced/metabolism/veterinary MH - MAP Kinase Signaling System/*drug effects MH - Mammary Glands, Animal/*drug effects/metabolism/*pathology MH - Mice MH - Transforming Growth Factor beta1/metabolism/*pharmacology OTO - NOTNLM OT - ERK 1/2 signalling pathway OT - TGF-beta1 OT - fibroblasts OT - proliferation EDAT- 2016/04/12 06:00 MHDA- 2017/02/22 06:00 CRDT- 2016/04/12 06:00 PHST- 2015/10/30 00:00 [received] PHST- 2016/04/04 00:00 [accepted] PHST- 2016/04/12 06:00 [entrez] PHST- 2016/04/12 06:00 [pubmed] PHST- 2017/02/22 06:00 [medline] AID - 10.1002/cbin.10609 [doi] PST - ppublish SO - Cell Biol Int. 2016 Jul;40(7):750-60. doi: 10.1002/cbin.10609. Epub 2016 May 5.