Excessive lipolysis and inflammatory response in adipose tissue are associated with elevated serum growth hormone in dairy cows with clinical ketosis. (PubMed, J Dairy Sci)
Differentiated adipocytes were used for (1) treatment with 0, 5, 10, or 15 ng/mL of GH for 8 h, or 15 ng/mL of GH for 0, 4, 8 or 12 h; (2) co-treatment with 15 ng/mL GH and 0.1 ng/mL tumor necrosis factor α (TNF-α); (3) pretreatment with 10 μM BAY 11-7082, a nuclear factor kappa B (NF-κB) inhibitor, and then treatment with 15 ng/mL GH...Furthermore, TNF-α exacerbated GH-induced lipolysis and inflammation, whereas inhibition of NF-κB signaling pathway partially reverses these metabolic alterations of GH-treated adipocytes. These findings suggested that GH promote lipolysis in bovine adipocytes by activating inflammatory pathways.