Maternal effect and familial aggregation in a type 2 diabetic Moroccan population

Area of Science:

• Endocrinology
• Human Genetics
• Public Health

Background:

• Type 2 diabetes mellitus (T2DM) is a complex metabolic disorder with increasing global prevalence.
• Understanding the genetic and familial components of T2DM is crucial for effective prevention and management strategies.
• Familial aggregation studies help elucidate the role of inherited factors in disease etiology.

Purpose of the Study:

• To assess the extent of familial aggregation of T2DM in the Moroccan population.
• To investigate the transmission patterns of T2DM within families.
• To explore the relationship between T2DM transmission and patient clinical profiles.

Main Methods:

• A case-control study involving 232 unrelated Moroccan patients with T2DM.
• Collection of family history data, including diabetes status of first-degree (parents, siblings) and second-degree relatives (aunts, uncles).
• Analysis of clinical and metabolic profiles of patients based on disease transmission patterns.

Main Results:

• 50% of participants reported at least one relative with diabetes; 24% had a diabetic parent.
• Significant familial aggregation of T2DM was observed, more pronounced in first-degree relatives (P < 0.01).
• A notable maternal transmission effect for T2DM was found in first-degree relatives (P = 0.02), but not in second-degree relatives. No significant differences in clinical/metabolic profiles were linked to transmission patterns.

Conclusions:

• The study confirms significant familial aggregation of T2DM in the Moroccan population.
• Evidence suggests an excess maternal transmission of T2DM, highlighting potential sex-specific genetic or environmental influences.
• Further research is warranted to elucidate the specific mechanisms underlying familial aggregation and maternal transmission of T2DM in this population.