2006
DOI: 10.1007/s11248-006-9031-5
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Ectopic expression of tethered human follicle-stimulating hormone (hFSH) gene in transgenic mice

Abstract: To determine whether the mammary gland can be used to secrete large quantities of a bioactive heterodimeric protein into milk, we used a bovine beta-casein promoter to target and express human follicle-stimulating hormone (hFSH) in the mammary gland into the milk of transgenic mice. We also identified the effects of hFSH leaked into the bloodstream. Transgenic mice produced a high level (up to 300 mIU/ml) of recombinant hFSH in the mammary gland. Human FSH was expressed in the mammary gland and brain, as deter… Show more

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Cited by 11 publications
(10 citation statements)
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“…In vitro biological activity of hFSH was determined by measuring cyclic-AMP (cAMP) production after exposing hFSH receptor-transfected cells to sterilized milk from each cell line. Milk containing hFSH increased cAMP production in the assay, indicating receptor binding and intracellular signaling, and therefore, biological activity of hFSH (43).…”
Section: Introductionmentioning
confidence: 93%
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“…In vitro biological activity of hFSH was determined by measuring cyclic-AMP (cAMP) production after exposing hFSH receptor-transfected cells to sterilized milk from each cell line. Milk containing hFSH increased cAMP production in the assay, indicating receptor binding and intracellular signaling, and therefore, biological activity of hFSH (43).…”
Section: Introductionmentioning
confidence: 93%
“…A similar model was later generated that also ectopically expressed FSH in mammary glands, but in this case, the transgene encoded human FSH. In these studies, the investigators used the bovine β-casein gene promoter to specifically express human FSH in mammary glands of transgenic mice (43). Milk was collected from tg-hFSH mice to determine FSH concentration using an enzyme-linked immunosorbent assay (ELISA).…”
Section: Introductionmentioning
confidence: 99%
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“…Human type II collagen was expressed from 1.8-and 3.1-kb bovine β-casein promoters in transgenic mice (Naruse et al, 2006). A 3.7-kb promoter fragment was used to express human follicle-stimulating hormone in transgenic mice (Kim et al, 2007). The reporter gene chloramphenicol acetyl transferase was expressed in transgenic bovine mammary epithelial cells (BMECs) from a 950-bp promoter fragment (Ahn et al, 1995).…”
Section: Introductionmentioning
confidence: 99%
“…However, there are some disadvantages in traditional transgenic research, including limited regulatory elements, random insertion and repeated nature of the multiple copy number integration, which results in low level expression, even with ectopic expression of recombinant proteins (al-Shawi et al, 1990;Clark et al, 1994;Dobie et al, 1996;Kim et al, 2007). In addition, the random integration of exogenous genes into the host genome may inadvertently affect the expression of endogenous genes by disabling them or activating them at an inappropriate time, which is dangerous for the transgenic animal (Seggewiss et al, 2006).…”
Section: Introductionmentioning
confidence: 99%