mark_petalcorin

CRISPR/Cas9 Targeted Genome Editing: Tips and Considerations

The genome found in every cell of our body contains over 20 thousand genes and over 3 billion letters of DNA that sustains life, shapes who we are and determines our risks of having a disease. CRISPR/Cas (clustered regularly interspaced palindromic repeats) is a recently discovered antiviral defence system in bacteria that has become the favorite set of tools to edit and correct any diseased genome and change any sequence of DNA in precisely chosen genomic location performed not in a test tube but within the nucleus of our living cell.

marvin_altamia

Comparative genomics of cellulolytic shipworm symbionts

Shipworms are marine bivalves that live and feed on wood. These bivalves, like most xylophagous and herbivorous animals, rely on bacterial symbionts to digest the recalcitrant lignocellulose component of plants. What’s unusual about shipworms is that bacterial symbionts are housed intracellularly in the specialized cells in the gills, therefore are not in direct contact with the ingested food particles.

michael_chan

Signaling-mediated epigenetic silencing of tumor suppressor genes in ovarian cancer

Aberrant TGFβ signaling pathway may alter the expression of down-stream targets and promotes ovarian carcinogenesis. However, the mechanism of this impairment is not fully understood. By ChIP-chip and expression microarray, we have previously identified several SMAD4 targets in an immortalized ovarian surface epithelial cells. Bioinformatic analyses identified several SMAD transcriptional modules that predict expression changes after TGF-β activation. Knockdown of SMAD4 in CP70 ovarian cancer cells showed an increase in promoter methylation in some of those SMAD4 targets as demonstrated by sequencing-based analysis.