Abstract
The basic metabolic process associated with white and beige/brown adipose tissues is lipolysis – the sequential enzymatic process of the hydrolysis of triglycerides in the adipose tissue. It has been repeatedly shown that physical activity activates lipolysis. It has recently been shown that skeletal muscles have an endocrine role; producing a host of myogenic hormones – myokines. Current literature has an incomplete understanding of the interdependent relationship between skeletal muscles and adipose tissue. We researched the influence of myocyte secreted cytokines (myokines) – meteorin-like protein (METRNL) and β-aminoisobutyric acid (BAIBA), and the adrenergic agonist isoproterenol on the levels of total and phosphorylated (Ser552) hormone sensitive lipase (HSL) in adipose tissue derived mesenchymal stromal cells (MSCs) and the cellular products of their adipogenic differentiation. The MSCs were obtained from 5 healthy donors. The adipogenic differentiation protocol was carried out for a span of 21 days. After procuring the adipocyte cultures, the following stimulators were added – 5 μM METRNL, 5 μM BAIBA, and 5 μM isoproterenol. With the help of western blot, the change in the amount of total and activated levels of HSL were monitored in cells of three different adipogenic differentiation protocols in MSCs. We observed that HSL and its activated form are produced in cell cultures induced with factors for white, beige, and brown adipogenic differentiation.
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