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47 results about "RIG-I" patented technology

RIG-I (retinoic acid-inducible gene I) is a RIG-I-like receptor dsRNA helicase enzyme that is encoded (in humans) by the DDX58 gene. RIG-I is part of the RIG-I-like receptor family, which also includes MDA5 and LGP2, and functions as a pattern recognition receptor that is a sensor for viruses such as influenza A, Sendai virus, and flavivirus. Certain retroviruses, such as HIV-1, encode a protease that directs RIG-I to the lysosome for degradation, and thereby evade RIG-I mediated signaling. RIG-I typically recognizes short (< 4000 nt) 5′ triphosphate uncapped double stranded or single stranded RNA. RIG-I and MDA5 are involved in activating MAVS and triggering an antiviral response. RIG-I is also able to detect non-self 5′-triphosphorylated dsRNA transcribed from AT-rich dsDNA by DNA-dependent RNA polymerase III (Pol III). For many viruses, effective RIG-I-mediated antiviral responses are dependent on functionally active LGP2.

Molecular marker for hemorrhagic disease resistance trait of grass carp and application of molecular marker

The invention belongs to the technical field of preparing a molecular marker of fish, and particularly relates to the molecular marker for a hemorrhagic disease resistance trait of grass carp and the application of the molecular marker. The molecular marker is obtained through grass carp RIG-I (Retinoic Acid-Induced Gene I) gene cloning and transcriptome sequencing; a nucleotide sequence of the molecular marker is as shown in a sequence table SEQ ID NO.1, and the insertion (deletion) (which is as shown in a sequence table SEQ ID NO.2) of amino acids located in 211 to 215 of RIG-I protein of the grass carp is caused by the insertion (the deletion) of a segment of 15bp base fragments of a basic group located in 665 of the SEQ ID NO.1. A GCRV (Grass Carp Reovirus) infection test shows that the death rate of gene inserting type grass carp is obviously lower than that of deletion type grass carp, thereby showing that the mutation of the segment of basic group of the RIG-I gene of the grass carp is related to the grass carp hemorrhagic disease resistance trait. According to the molecular marker disclosed by the invention, a new molecular marker is provided for marker assisted selection of the hemorrhagic disease resistance trait of the grass carp.
Owner:HUAZHONG AGRI UNIV

Difunctional 3p-siRNA inhibiting hepatitis B viruses, and application thereof

The invention relates to a synthesis method of difunctional 5'-ppp-siRNA (3p-siRNA) for efficiently and specifically inhibiting the replication of hepatitis B viruses (HBVs), and an application of the 3p-siRNA. The 3p-siRNA specifically inhibit the HBV target gene expression through an RNAi mechanism, activates the host interferon expression through an RIG-I dependence mechanism, has an antivirus effect through antiviral natural immunoreactions, and is difunctional anti-HBV novel 3p-siRNA simultaneously having the effects of RNAi and the activation of the host antiviral natural immunoreactions; and the 3p-siRNA has a small toxicity, can efficiently activate the RIG-I mediated host natural antiviral interferon (IFN) expression, can substantially inhibit the HBeAg and HBsAg secretion and the DNA replication of the HBVs, and has an obvious dosage dependency. The anti-HBV difunctional 3p-siRNA is prepared through adopting an in-vitro transcription method and an artificial chemical synthesis method, and can be used for the researches and exploitation of novel HBV medicines. The difunctional 3p-siRNA can be used for the researches and exploitation of other important human viral and bacterial nucleic acid novel medicines.
Owner:INST OF RADIATION MEDICINE ACAD OF MILITARY MEDICAL SCI OF THE PLA
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