Grahame Hardie, David Carling and Alastair T.R. Sim. The A MP-activated protein kinase is a component of a protein-kinase cascade that. is activated by lipid metabolites, and which has recently been found to regulate. several key enzymes of lipid metabolism.
That said, the key difference between rheumatoid arthritis and osteoarthritis is the cause behind how the joints are affected. Osteoarthritis is a slow and progressive degenerative joint disease, that is, it will slowly develop over years of wear-and-tear on the joints and cartilage.
The difference between osteopenia and osteoporosis is that in osteopenia the bone loss is not as severe as in osteoporosis. That means someone with osteopenia is more likely to fracture a bone than someone with a normal bone density but is less likely to fracture a bone than someone with osteoporosis.steopenia is a bone condition characterized by a decreased density of bone, which leads to bone weakening and an increased risk of breaking a bone (fracture).