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• W2035103687 abstract "Abstract Context: Kallmann’s syndrome (KS) is a genetically heterogeneous disorder consisting of congenital hypogonadotropic hypogonadism (CHH) with anosmia or hyposmia. Objective: Our objective was to compare the reproductive phenotypes of men harboring KAL1 and FGFR1/KAL2 mutations. Design and Patients: We studied the endocrine features reflecting gonadotropic-testicular axis function in 39 men; 21 had mutations in KAL1 and 18 in FGFR1/KAL2, but none had additional mutations in PROK-2 or PROKR-2 genes. Results: Puberty failed to occur in the patients with KAL1 mutations, all of whom had complete CHH. Three patients with FGFR1/KAL2 mutations had normal puberty, were eugonadal, and had normal testosterone and gonadotropin levels. Cryptorchidism was more frequent (14 of 21 vs. 3 of 15; P &lt; 00.1) and testicular volume (2.4 ± 1.1 vs. 5.4 ± 2.4 ml; P &lt; 0.001) was smaller in CHH subjects with KAL1 mutations than in subjects with FGFR1/KAL2 mutations. The mean basal plasma FSH level (0.72 ± 0.47 vs. 1.48 ± 0.62 IU/liter; P &lt; 0.05), serum inhibin B level (19.3 ± 10.6 vs. 39.5 ± 19.3 pg/ml; P &lt; 0.005), basal LH plasma level (0.57 ± 0.54 vs. 1.0 ± 0.6 IU/liter; P &lt; 0.01), and GnRH-stimulated LH plasma level (1.2 ± 1.0 vs. 4.1 ± 3.5 IU/liter; P &lt; 0.01) were significantly lower in the subjects with KAL1 mutations. LH pulsatility was studied in 13 CHH subjects with KAL1 mutations and seven subjects with FGFR1/KAL2 mutations; LH secretion was nonpulsatile in all the subjects, but mean LH levels were lower in those with KAL1 mutations. Conclusion: KAL1 mutations result in a more severe reproductive phenotype than FGFR1/KAL2 mutations. The latter are associated with a broader spectrum of pubertal development and with less severe impairment of gonadotropin secretion." @default.
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• W2035103687 date "2008-03-01" @default.
• W2035103687 modified "2023-10-11" @default.
• W2035103687 title "Kallmann’s Syndrome: A Comparison of the Reproductive Phenotypes in Men Carrying KAL1 and FGFR1/KAL2 Mutations" @default.
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• W2035103687 doi "https://doi.org/10.1210/jc.2007-1168" @default.
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