Apoptosis involves a series of biochemical events leading to a characteristic cell morphology and death, including changes to the cell membrane, cell shrinkage, nuclear fragmentation, chromatin condensation, and chromosomal DNA fragmentation. It plays important roles in removing unwanted cells during development and homeostasis. Excessive apoptosis causes hypotrophy, such as in ischemic damage, whereas an insufficient amount results in uncontrolled cell proliferation, such as cancer. MicroRNAs are newly discovered small non-coding RNA molecules that regulate up to 30% of mammalian gene expression. Numerous miRNAs have been revealed to have an influence on the regulation of apoptotic cell signaling such as overexpression of miR-145, miR-216, miR-182, and miR-96 miRNA to decrease caspase-3 activation. Signosis developed a miRNA array for targeting 47 miRNAs that have been shown in literature to be involved in apoptosis. Profiling the expression of these miRNAs will facilitate in uncovering the regulation of miRNA in apoptosis.