Calcium Homeostasis Is Involved in the Modulation of Gene Expression by MSL2 in Imbalanced Genomes.

Aneuploidy is highly detrimental to organisms due to genomic imbalance. However, the influence of parental unbalanced genome conditions on gene expression of their offspring remains unclear, particularly in animals. To further explore the molecular regulatory mechanisms, we firstly analyzed the expression patterns of aneuploid offspring from different parents with unbalanced genomes via reciprocal crosses and studied the potential functions of male-specific lethal 2 (MSL2) in this process.

Interaction of Male Specific Lethal complex and genomic imbalance on global gene expression in Drosophila.

The inverse dosage effect caused by chromosome number variations shows global consequences in genomic imbalance including sexual dimorphism and an X chromosome-specific response. To investigate the relationship of the MSL complex to genomic imbalance, we over-expressed MSL2 in autosomal and sex chromosomal aneuploids, and analyzed the different transcriptomes. Some candidate genes involved in regulatory mechanisms have also been tested during embryogenesis using TSA-FISH.