Intramammary infusion of Panax ginseng extract in the bovine mammary gland

DALLARD BIBIANA ELISABET; SILVINA A. PUJATO; CELINA BARAVALLE; ELIZABET A.L. PEREYRA; FLORENCIA REY; MARÍA SOL RENNA; LUIS F. CALVINHO

RESEARCH IN VETERINARY SCIENCE

ELSEVIER SCI LTD

Lugar: Amsterdam; Año: 2013 vol. 94 p. 462 - 470

0034-5288

The objective of this study was to evaluate the effects of a single intramammary infusion of Panax ginseng extract (GS) on insulin-like growth factors (IGF) in bovine mammary gland during early involution. Eight mammary quarters from six nonpregnant cows in late lactation were infused with 10 mL of ginseng extract solution (3 mg /mL), six quarters were treated with 10 mL of placebo (vehicle alone) and six quarters were maintained as uninoculated controls. Milking was interrupted after infusion. Concentrations of IGF1 in mammary secretions were higher in GS-treated quarters than in placebo and uninoculated control quarters at 24, 48 and 72 h post-treatment (p < 0.05). Treatment with GS did not affect mammary secretion of IGF2 (p = 0.942). At 7 d of post-lactational involution, a decrease of immunostained area and mRNA expression for IGF1 was observed in mammary tissue of GS-treated quarters compared with placebo-treated quarters and uninoculated controls (p < 0.05). The IGF2 immunostained area and mRNA expression for this growth factor were not affected by GS treatment (p = 0.216 and p = 0.785, respectively). An increase in protein levels and mRNA expression in mammary tissue of IGFBP3, IGFBP4 andIGFBP5 was observed in GS-treated quarters compared with placebo-treated quarters and uninoculated controls (p < 0.05). These results provide evidence that intramammary inoculation of GS extract at cessation of milking may promote early mammary involution through the inhibition of IGF1 local production and bioavailability.