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6 days ago
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Later timing of puberty seems to correlate with lower areal bone mineral density in children and may affect the eventual risk of osteoporosis, a recent study suggests.
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Genetically-determined delayed puberty tied to lower lumbar spine BMD

04 Dec 2017

Later timing of puberty seems to correlate with lower areal bone mineral density (aBMD) in children and may affect the eventual risk of osteoporosis, a recent study suggests.

The researchers recruited participants from both the longitudinal (n=933) and cross-sectional (n=486) cohorts of the bone mineral density in childhood study, resulting in a final sample consisting of 733 females and 685 males.

BMD at various sites was measured using dual X-ray absorptiometry. Participants were classified as prepubertal, pubertal or postpubertal according to phenotypic characteristics. Using the provided DNA samples, a sex-specific polygenic risk score (GRS) was calculated from 333 and 49 puberty-delaying alleles for males and females, respectively.

In females, delayed age at menarche (AAM) was significantly associated with GRS even after adjusting for body mass index z-scores (BMIz; p=1.56x10-6). Later entry of either sex in the puberty categories was also associated with GRS.

Age- and sex-specific aBMD z-scores (aBMDz) at the lumbar spine (LS) were also significantly associated with puberty-delaying GRS in males (p=0.039), females (p=0.0097) and in the combined cohort (p=0.001).

In contrast, GRS was not associated with aBMDz at the radius (p=0.2819), femoral neck (p=0.3547) and total hip (p=0.2547) in the combined cohort. The same trend was observed in both male and female subgroups.

“Our results show that genetic risk for later-than-average puberty associated with lower LS-aBMDz. This association, although stronger in girls in childhood, was evident in adulthood in both sexes,” the researchers said.

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Most Read Articles
6 days ago
Survival in age-related macular degeneration (AMD) may be lower in patients with late disease, bilateral cataract surgery and poor visual acuity, according to data from the Age-Related Eye Disease Study 2. Moreover, oral supplementation with omega-3 fatty acids, lutein plus zeaxanthin, zinc or beta-carotene does not significantly affect mortality.
04 Dec 2017
Later timing of puberty seems to correlate with lower areal bone mineral density in children and may affect the eventual risk of osteoporosis, a recent study suggests.
Jairia Dela Cruz, 6 days ago
Discontinuation of aspirin may have detrimental consequences for long-term users, with a recent study reporting that cessation of use in the absence of major surgery or bleeding increases the risk of cardiovascular events.
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Cognitive deficits in bipolar disorder are neurodevelopmental rather than neurodegenerative in nature, a recent study has reported. Furthermore, cognitive impairment in bipolar patients appears to be stable, in the majority at least.