4-1 Endocrine Flashcards
Powerful immunosuppresant
Cprtisol
Give classic endocrine glands
Potuitary Thyroid Parathyroid Pancreatic islets Adrenals gonads
These have profound effects on the functions of potuitary, adrenal, thyroid, and gonads
Cytokines and ILs
May manifest findings such as central fat redistribution, striae, proximal muscle weakness, in addition to feats common to general population
Cushings syndrome
Mental slowing, fatigue, dry skin and other findings– can be difficult to distinguish
Hypothyroidism
Most important dx tool in endo
Immunoassay
5major classes of hormones
Amino acid Small neuropeptides Large proteins Steroid hormones Vitamin derivatives
Give example of large proteins?
Insulin
LH
PTH
Examples of small neuropeptides?
GnRH
TRH
Somatostatin
Vasopressin
Are heterodimers that have
Glycoprotein hormones
Have structural similarities that are most apparent when precursor forms of the protein are compared
Insulin
Igf 1 and 2
Another important example of cross talk is seen with________; these have amino acid sequence similarity.
PTH
PTHrP
Type 1 nuclear receptors bind what?
Steroids
Hormone binding is highly is highly specific for a single type of nuclear receptor; the only exception is?
Glucocortixoid and mineralocortixoid receptors
Gluco and minerlocorticoid exemption, This phenomenon is particularly pronounced in?
Ectopic AcTH syndrome
This feature of edtrogen receptor makes it susceptible to activation bh rnvironmental estrogens
Can bind to an array of compounds
Prohormone of AcTH
POMC
Prohormone conversion occurs not only for peptide hormones but also for certain steroids such as
Testos ➡️ dht
T3 ➡️ t4
These precursors generate multiple biologically active peptides
POMC
Proglucagon
Synthesis of most steroid hormones is based on modifications of the precursor
Cholesterol
Repressed directly by thyroid hormones acting through thyroid hormone (TR)
Tsh genes
For some hormones, substantial regulation occurs at
Level of translational efficiency
Stored in secretory granules
Peptide hormones
Transports cholesterol into the mitochondrion
Steroidogenic acute regulatory protein