PubMed · 4247825
The source did not provide an abstract. Follow the original record for more information.
Explore connections, maps & timelines
J Cohen. 1970-10-01. Dwarfs.. https://doi.org/10.1056/nejm197010012831413
Cite the original work for its findings. Save a collection to share your selection of sources.
KEEP EXPLORING
Erythropoiesis was investigated in 32 children wih short stature and in eight children with skeletal dysplasia by studying blood hemoglobin in relation to growth and to serum concentrations of insulin-like growth factor I (IGF-I), IGF binding protein-3 (IGFBP-3), and erythropoietin (EPO) before, during, and after 12 months of recombinant human growth hormone (GH) treatment. Blood hemoglobin concentration was positively correlated with relative body height and with serum IGF-I and IGFBP-3 levels (P = .001 to .02), but not with the concentrations of EPO. The normal age-dependency of hemoglobin was lacking. Hemoglobin levels and their responses to GH treatment were similar in the patients with GH deficiency and those with normal GH secretion. Treatment with GH accelerated growth and elevated the concentrations of hemoglobin, IGF-I, and IGFBP-3. In the eight patients with skeletal dysplasia, body mass increased similarly, but gain in height was less than in the other patients, and the increase in hemoglobin was markedly pronounced. In this group, the correlations between hemoglobin, IGF-I, and IGFBP-3 were extremely close (r = 0.80 to 0.85, P = .031 to .008). These findings are in accord with earlier observations from in vitro and animal studies, and suggest that the GH-IGF axis is involved in the physiologic elevation of hemoglobin levels during childhood.
Achondroplasia is the most common form of dwarfism in humans. A recurrent glycine-to-arginine mutation at codon 380 (G380R) of the transmembrane domain of fibroblast growth factor receptor-3 (FGFR-3) was identified in the majority of Western and Japanese patients, which is uncommon in other autosomal dominant genetic diseases. To determine whether this mutation is also common in Chinese patients, we examined the G380R mutation in Chinese patients with achondroplasia. Of ten patients studied, including eight sporadic cases and one family with two affected members, all have the same G380R mutation with a G-to-A transition. Our results support the argument that the G380R mutation of FGFR-3 is the most frequent mutation causing achondroplasia across different populations.
Explore the source record for details and available documents.