Immunoreactive and bioactive luteinizing hormone in pubertal patients with chronic renal failure. Cooperative Study Group on Pubertal Development in Chronic Renal Failure.

Abstract:

:Disturbed pulsatile LH secretion has been suggested to play a role in the etiology of delayed puberty and disturbed reproductive function in chronic renal failure (CRF), but interpretation of gonadotropin secretion from plasma concentration measurements is confounded by alterations in hormone metabolic clearance. To simultaneously investigate LH secretion and clearance in children, we performed multiple-parameter deconvolution analysis of 11-hour over-night serum LH concentration-time series of bioactive (bio-LH) and immunoreactive (i-LH) hormone in 36 pubertal patients (18 boys) with various degrees of CRF and 10 healthy controls matched for sex and pubertal stage. Twelve patients received conservative treatment for advanced but compensated CRF, 12 were treated by dialysis, and 12 were studied after successful renal transplantation. We observed that: (1) the mean (+/- SE) plasma half-lives of bio-LH and i-LH were increased in the dialysis group (155 +/- 47 and 201 +/- 31 min) and in the patients on conservative treatment (148 +/- 45 and 135 +/- 70 min) compared to controls (59 +/- 28 and 63 +/- 21 min; all P < 0.05). The plasma half-life of bio-LH in patients on conservative treatment or after renal transplantation was inversely correlated with glomerular filtration rate (GFR) (r = -0.70; P < 0.0001). (2) Pulsatile bio-LH production rate was independently affected by pubertal stage (P = 0.018) and treatment status (P = 0.017), increasing across pubertal stages and being significantly lower in dialysis patients (20 +/- 4 IU/liter * 11 hr) and patients on conservative treatment (28 +/- 9) than in controls (43 +/- 9; all P < 0.05). In patients on conservative treatment or after transplantation, a significant positive correlation between pulsatile bio-LH production rate was observed (r = 0.53; P < 0.008). Pulsatile i-LH secretion rate was significantly reduced only in dialysis patients (15 +/- 34 vs. 46 +/- 18; P < 0.05). (3) The reduction of pulsatile i-LH and/or bio-LH production rates was attributable to a halving of the LH mass secreted per burst in patients on conservative (bio-LH: 4.9 +/- 1.9 IU/liter) and dialysis treatment (bio-LH: 3.2 +/- 0.7, i-LH: 2.4 +/- 0.6 IU/liter) versus controls (bio-LH: 6.9 +/- 1.3, i-LH: 5.4 +/- 2.1 IU/liter), whereas the LH pulse frequency was not different between controls and treatment groups.(ABSTRACT TRUNCATED AT 400 WORDS)

journal_name

Kidney Int

journal_title

Kidney international

authors

Schaefer F,Veldhuis JD,Robertson WR,Dunger D,Schärer K

doi

10.1038/ki.1994.191

subject

Has Abstract

pub_date

1994-05-01 00:00:00

pages

1465-76

issue

5

eissn

0085-2538

issn

1523-1755

pii

S0085-2538(15)58472-X

journal_volume

45

pub_type

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