Sandrine Visentin, Gérard Michel, Claire Oudin, Béatrice Cousin, Bénédicte Gaborit, Inès Abdesselam, Marie Maraninchi, Marion Nowicki, René Valéro, Maxime Guye, Monique Bernard, Pascal Auquier, Hervé Chambost, Marie-Christine Alessi and Sophie Béliard.

Endocrine connections. 2019 Apr;8(4):349-359.

https://pubmed.ncbi.nlm.nih.gov/30844749/

Background/objective

The number of long-term survivors of childhood acute leukemia (AL) is substantially growing. These patients are at high risk for metabolic syndrome (MS), especially those who received total body irradiation (TBI). The consequences of children’s irradiation on adipose tissue (AT) development in adulthood are currently unknown. The objective of this study is to assess the impact of TBI on AT of childhood AL survivors.

Design

We compared the morphological and functional characteristics of AT among survivors of childhood AL who developed MS and received (n = 12) or not received (n = 12) TBI.

Subjects/methods

Body fat distribution and ectopic fat stores (abdominal visceral and liver fat) were evaluated by DEXA, MRI and 1H-spectroscopy. Functional characteristics of subcutaneous AT were investigated by studying gene expression and pre-adipocyte differentiation in culture.

Results

Patients who have received TBI exhibited a lower BMI (minus 5 kg/m2) and a lower waist circumference (minus 14 cm), especially irradiated women. Despite the lower quantity of intra-abdominal AT, irradiated patient displayed a nearly two-fold greater content of liver fat when compared to non-irradiated patient (17 vs 9%, P = 0.008). These lipodystrophic-like features are supplemented by molecular abnormalities in subcutaneous AT of irradiated patients: decrease of gene expression of SREBP1 (minus 39%, P = 0.01) and CIDEA (minus 36%, P = 0.004) and a clear alteration of pre-adipocyte differentiation.

Conclusions

These results strongly support the direct effect of irradiation on AT, especially in women, leading to specific nonalcoholic fatty liver disease, despite lower BMI. A long-term appropriate follow-up is necessary for these patients.

Keywords: adipocytes; childhood AL; ectopic fat; hepatic steatosis; irradiation; metabolic syndrome.

Sandrine Visentin, Gérard Michel, Claire Oudin, Béatrice Cousin, Bénédicte Gaborit, Inès Abdesselam, Marie Maraninchi, Marion Nowicki, René Valéro, Maxime Guye, Monique Bernard, Pascal Auquier, Hervé Chambost, Marie-Christine Alessi and Sophie Béliard.

Endocrine connections. 2019 Apr;8(4):349-359.

Background/objective

Design

Subjects/methods

Results

Conclusions

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