Authentic Biochemistry

In today's lecture, Dr Guerra explains how subclinical hypothyroidism obtains increased serum thyrotropin (thyroid stimulating hormone, TSH) with flat levels of of free thyroxin (T4) and biologically active free triiodothyronine (T3) in the elderly;β1 adrenergic receptors, sodium/potassium ATPase, voltage-gated potassium channels, malic enzyme and atrial and brain natriuretic factor all respond favourably to thyroxin and hese proteins form the primary architecture of the cardiomyocyte and determine contractile strength. ATP drives muscle contraction/relaxation thus active  mitochondrial nadh  oxidation is essential for healthy aging. Ketone and free fatty acid oxidation decreases with aging while glucose oxidation reciprocally increases while thyroid hormone levels decline with aging, suggesting that myocardial metabolic pathology is linked phenomenologically to subclinical hypothyroidism. Indeed,thyroid hormone deficiency found in aging populations inhibits fatty acid oxidation through transcriptio