RNA Interference in Biotechnology and Pharmacetics

Dr. Youle and his colleagues collaborated with Scott Martin to introduce small interfering RNA (siRNA) into human cells using robot technology that inhibits approximately 22,000 genes, respectively. Automated microscopy was then performed to determine how silencing of each gene affects the ability of parkin to label mitochondria. Researchers used RNAi to identify genes that aid Parkin-tagged mitochondria. They found that the genes TOMM7, HSPAI1L, BAG4 and SIAH3 may contribute to inhibition of parkin (TOMM7, HSPAI1L) or enhancement markers (BAG4, SIAH3).

The antisense RN A is complementary to the sense or coding RNA. The dsRNA (double-stranded RNA) is formed from these two complementary RNAs. Specific (silent) neutralization of RNA of nematode dsRNA by a process called RNA interference. For all of these, in the transgenic host, the parasite can not survive by expressing specific interfering RNA. Thus, tobacco transgenic plants can be protected against nematode attack.

RNA interference - RNA interference uses short sequence RNA that is complementary to mRNA that carries instructions for translating proteins from DNA to ribosomes. Interfering RNA binds to the target sequence and prevents its translation. Therefore, careful selection of interfering RNA can be used to silence certain genes. This allows researchers to study the role of proteins in cells by observing what happens when proteins are lost. Interval microscopy - It is not practical for direct observation, as many cellular processes (such as mitosis) occur over a period of time. Imaging cells over a period of time (eg, taking 24 hours of photos every 20 minutes) makes it possible to combine these images into a "movie", which makes the long term a shorter period of time Compress.

RNA interference (RNAi) is a relatively new technique used to prevent DNA encoding specific genes from being transcribed and translated into proteins. In the usual process, DNA is first transcribed into messenger RNA (mRNA), which is translated into protein by cellular machinery. In mammalian cells, this is a well-planned process that controls multiple cellular activities and prevents the virus from hijacking cellular mechanisms. RNAi technology provides unique cellular mechanisms to "silence" genes by providing short interfering RNAs (siRNAs) that bind to complementary strands of mRNA, promoting their degradation, and preventing protein production use.

Small interfering RNA (siRNA) is a double-stranded RNA of about 21-25 nucleotides. They are known to be important intermediates in causing RNA interference in invertebrates. The siRNA has a characteristic structure with 5 * phosphate groups ** - hydroxyl ends and 2 bases 3 * overhangs on each strand of the duplex. (Caplen et al., 2009) The results of this study suggest that histone octamer is not an unimpaired obstacle to the passage of RNA polymerase, and that octamers can move around the enzyme without releasing control of their DNA Respectively. . For longer templates, the octamer can migrate to any vacancy on DNA, which can be controlled by the "closed loop" probability. However, the use of short DNA fragments limits the final position available for octamers (Felensfeld et al 1996).