Older mothers are not at risk of having grandchildren with sporadic mtDNA deletions.

Genet Med

Mitochondrial Research Group, MRC Centre for Brain Ageing and Vitality, Institute for Ageing and Health, Newcastle University, Newcastle upon Tyne, United Kingdom.

Published: May 2010

Purpose: Single large-scale mitochondrial DNA deletions account for a quarter of mitochondrial disease cases and occur sporadically with unknown risk factors. Mitochondrial DNA deletions accumulate with age in many tissues. Primordial germ cells, the precursors of oocytes are made by our grandmothers, therefore we wanted to determine whether age of maternal grandmother is a risk factor for sporadic mitochondrial DNA deletions.

Methods: Twenty-nine patients with sporadic single mitochondrial DNA deletions from the Newcastle UK cohort provided dates of birth for mothers and maternal grandmothers plus father and paternal grandmother (healthy controls).

Results: Mean age for grandmothers at birth of a mother of an affected patient was 28.5 years (SD +/- 6.9) for single mitochondrial DNA deletions maternal grandmothers and 28.2 years (SD +/- 6.1) for healthy control paternal grandmothers.

Conclusion: Maternal grandmother age is not a risk factor for sporadic mitochondrial DNA deletions, an important observation in a population where many women are delaying reproduction.

Download full-text PDF

Source
http://dx.doi.org/10.1097/GIM.0b013e3181da76e3DOI Listing

Publication Analysis

Top Keywords

mitochondrial dna
24
dna deletions
20
maternal grandmother
8
risk factor
8
factor sporadic
8
sporadic mitochondrial
8
single mitochondrial
8
maternal grandmothers
8
years +/-
8
mitochondrial
7

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!