Catabolic and anabolic reaction difference

A very typical case of severe cholestasis due to anabolic steroid use.  Because the steroids were being used without medical supervision, the dose and actual duration of use of each preparation was unclear, but cholestasis usually arises within 4 to 12 weeks of starting a C-17 alkylated androgenic steroid.  The jaundice can be severe and prolonged and accompanied by severe pruritus and marked weight loss.  The serum enzymes are typically minimally elevated except for a short period immediately after stopping therapy.  The pattern of enzyme elevations can be hepatocellular, cholestatic or mixed.  Liver biopsy shows a “bland” cholestasis with minimal inflammation and hepatocellular necrosis.  Ma Huang has also been implicated in cases of drug induced liver injury, but is associated with an acute hepatocellular pattern of injury.

Parathyroid hormone (PTH) is essential for the maintenance of calcium homeostasis through, in part, its actions to regulate bone remodeling. While PTH stimulates both bone formation and bone resorption, the duration and periodicity of exposure to PTH governs the net effect on bone mass, that is whether it is catabolic or anabolic. PTH receptor signaling in osteoblasts and osteocytes can increase the RANKL/OPG ratio, increasing both osteoclast recruitment and osteoclast activity, and thereby stimulating bone resorption. In contrast, PTH-induced bone formation is explained, at least in part, by its ability to downregulate SOST/sclerostin expression in osteocytes, permitting the anabolic Wnt signaling pathway to proceed. The two modes of administration of PTH, that is, continuous vs. intermittent, can regulate, in bone cells, different sets of genes; alternatively, the same sets of genes exposed to PTH in sustained vs. transient way, will favor bone resorption or bone formation, respectively. This article reviews the effects of PTH on bone cells that lead to these dual catabolic and anabolic actions on the skeleton.

For children, these reactions should not be in balance.  In a child, the anabolic reactions have to be greater than the catabolic.  Boys start their growth spurt after girls.  That’s why when they are in 7th or 8th grade, the girls are still taller than the boys.  The boys change a couple years after the girls.  Guys may gain 2-3 inches in that growth spurt between 14-17 years of age.  During that growing period they will eat up all the food in your refrigerator.  They are growing like crazy during that time.  But what happens to both boys and girls at 18-19 is that if they keep eating the same way, they won’t grow taller anymore but only wider.  This is the phenomena everybody notices.

Catabolic and anabolic reaction difference

catabolic and anabolic reaction difference

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