Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UNIPROT:P61278 (somatostatin)
 22,083 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Untreated acromegaly is associated with an increased cardiovascular morbidity and mortality. The contribution of altered lipid metabolism remains unclear. We investigated the relationship between serum apolipoprotein(a) (apo(a)) and growth hormone (GH) levels in 15 patients with acromegaly before and during treatment with octreotide, a long-acting somatostatin analogue, 288-600 micrograms/day s.c., for 6 months. Before treatment serum apo(a) was significantly elevated in acromegalic patients (geometric mean being 323 U/l vs. 142 U/l in controls (n = 92; P < 0.01)). Octreotide treatment resulted in significant reductions in serum apo(a) concentration (F = 7.22; P < 0.01; geometric mean being 232 U/l and 248 U/l at 3 months and 6 months respectively) and apo(a) concentrations on treatment were not significantly different from control values. There were significant reductions in serum GH (F = 7.30; P < 0.01), insulin growth factor 1 (IGF1) (F = 31.4, P < 0.001) and insulin (F = 4.57; P < 0.05) concentrations. Plasma glycosylated haemoglobin levels were unchanged. Apo(a) levels correlated with serum GH (r = 0.450; P < 0.01) but showed no correlation with basal insulin concentrations. Serum HDL cholesterol increased on treatment (F = 4.29; P < 0.05). Triglycerides were reduced only in the 12 patients without diabetes mellitus (F = 4.75; P < 0.05). No significant change in LDL cholesterol occurred. Our findings suggest that apo(a) may constitute another cardiovascular risk factor in untreated acromegaly and that GH may be involved in the regulation of circulating apo(a) concentration.
 ...
PMID:Serum apolipoprotein(a) correlates with growth hormone levels in Chinese patients with acromegaly. 814 41

Lipoprotein(a) (Lp(a)) is an independent risk factor for atherosclerotic disease. However, information concerning the site of Lp(a) catabolism and breakdown is scarce. Several studies have shown that, in renal insufficiency, plasma Lp(a) levels are elevated, and that after normalisation of kidney function they return to normal. We have recently shown that fragments of apo(a) are found in the urine of healthy individuals. Despite this evidence that apo (a) is excreted into the urine, the mode of excretion of apo(a) remains unclear. Since it has been reported that intravenous infusion of somatostatin can reduce glomerular filtration rate (GFR) and renal plasma flow (RPF), we analysed urinary apo(a) excretion in ten healthy volunteers receiving somatostatin infusions. The infusion of somatostatin led to reversible changes in GFR and RPF. Apo(a) excretion was constant in all 10 individuals over the entire time course when normalised for creatinine. There was a highly significant correlation between plasma Lp(a) levels and urinary apo(a) values. Changes in renal plasma flow and glomerular filtration rate did not alter urinary apo(a) excretion. We conclude that a constant amount of apo(a) is excreted into urine, depending on plasma Lp(a) levels, and that urinary apo(a) excretion is not altered by changes in GFR and RPF in healthy males.
 ...
PMID:Urinary apo(a) excretion is not altered by changes in glomerular filtration rate and renal plasma flow in healthy males. 1072 63