Part:BBa_K1633008:Experience

This experience page is provided so that any user may enter their experience using this part.
Please enter how you used this part and how it worked out.

Applications of BBa_K1633008

USAGE AND BIOLOGY

Neutral sphingomyelinase 2 (nSMase 2) is a key regulatory enzyme generating ceramide from sphingomyelin and can actively induce exosome secretion from cells and trigger cellular export of small RNAs. The original sequence of nSMase 2 from Homo Sapiens is from NCBI. NCBI Gene ID is 55512. The sequence codon of this part was optimized. We ordered the sequence from a DNA synthesis company. When this part is inserted into pcDNA 3.1 vector and transfected into mammalian cells, it can express nSMase 2 gene in mammalian cells and stimulate the secretion of exosomal siRNAs from cells.

CHARACTERIZATION

Stimulation of exosome and exosomal siRNA secretion by introduction of nSMase 2

Extracellular vesicles (EVs) are generated through biogenetic mechanisms involving neutral sphingomyelinase (nsMase).

Because nSMase2 can stimulate both exosome production and siRNA loading to exosomes, we selected nSMase2 as a “molecular pump” to accelerate the amounts of exosomes released by cells and to promote the generation of exosomal siRNAs. A plasmid expressing nSMase2 was constructed and transfected into HEK293 cells to stimulate the secretion of exosomes and exosomal siRNA from HEK293 cells. As anticipated, both exosomes and exosomal siRNA secreted by HEK293 cells were increased after overexpressing nSMase2 in HEK293 cells.

Figure 16. (A) Total amounts of exosomes (shown as total protein) secreted by HEK293 cells with or without the introduction of nSMase2. (B) Quantitative RT-PCR analysis of siRNA levels in exosomes secreted by HEK293 cells with or without the introduction of nSMase2.

User Reviews

UNIQ8725233d84898d9a-partinfo-00000000-QINU UNIQ8725233d84898d9a-partinfo-00000001-QINU