Cardiopulmonary structural, functional and immune-alterations in a Down syndrome mouse model and upon modulation of EGCG
Tielemans, B.; Llambrich, S.; Seldeslachts, L.; Cremer, J.; Tsui, H.-C.; Jonckheere, A.-C.; Marain, F.; Riedel, M.; Wouters, J.; Herzen, J.; Leszczynski, B.; Verbeken, E.; Vanoirbeek, J.; Vande Velde, G.
Show abstract
In individuals with Down syndrome (DS), cardiovascular and pulmonary diseases are the most common health problem and result in increased mortality and morbidity. Although these clinical comorbidities are well described, no preclinical models for DS are fully characterized for cardiopulmonary alterations, preventing research to understanding the development and pharmacological modulation of lungs, heart and immune system. Our objective is to characterize the cardiopulmonary and immunological phenotype in Ts65Dn mice and investigate the modulatory effects green tea extract enriched in epigallocatechin 3 gallate (GTE-EGCG). GTE-EGCG administration started at embryonic day 9 and was discontinued at postnatal day (PD) 180. Newborns were longitudinally monitored until PD210 using micro-computed tomography. At endpoint, we characterized the structural, functional and immunological alterations and persistent effects of GTE-EGCG administration. This study revealed normal lung development in the Ts65Dn mice and highlighted RV hypertrophy and immunological alterations. GTE-EGCG administration resulted in genotype-specific and genotype-independent alterations resulting in lung immaturation and airway hyperreactivity. Our results highlight the cardiovascular and immunological phenotype of Ts65Dn mice and potential use for safety studies of therapeutic agents in a DS-specific context. Summary statementThis study longitudinally follows respiratory and cardiac alterations in the Ts65Dn mouse model and describes the impact of prenatal EGCG modulation on the euploid and trisomic phenotype
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