JK-05 is a broad-spectrum

antiviral drug Antiviral drugs are a class of medication used for treating viral infections. Most antivirals target specific viruses, while a broad-spectrum antiviral is effective against a wide range of viruses. Antiviral drugs are a class of antimicrobials ...

developed by the Chinese company Sihuan Pharmaceutical along with the Chinese Academy of Military Medical Sciences. It is reported to act as an inhibitor of the viral enzyme

RNA polymerase In molecular biology, RNA polymerase (abbreviated RNAP or RNApol), or more specifically DNA-directed/dependent RNA polymerase (DdRP), is an enzyme that catalyzes the chemical reactions that synthesize RNA from a DNA template. Using the e ...

, which is essential for viral replication. In tests on mice, JK-05 was claimed to show efficacy against a range of

RNA virus An RNA virus is a virus characterized by a ribonucleic acid (RNA) based genome. The genome can be single-stranded RNA (ssRNA) or double-stranded (Double-stranded RNA, dsRNA). Notable human diseases caused by RNA viruses include influenza, SARS, ...

es, including

influenza Influenza, commonly known as the flu, is an infectious disease caused by influenza viruses. Symptoms range from mild to severe and often include fever, runny nose, sore throat, muscle pain, headache, coughing, and fatigue. These sympto ...

Ebola virus ''Orthoebolavirus zairense'' or Zaire ebolavirus, more commonly known as Ebola virus (; EBOV), is one of six known species within the genus ''Ebolavirus''. Four of the six known ebolaviruses, including EBOV, cause a severe and often fatal vira ...

, and yellow fever, as well as several

arenavirus An arenavirus is a bi- or trisegmented ambisense RNA virus that is a member of the family ''Arenaviridae''. These viruses infect rodents and occasionally humans. A class of novel, highly divergent arenaviruses, properly known as reptarenavirus ...

es and bunyaviruses. The

chemical structure A chemical structure of a molecule is a spatial arrangement of its atoms and their chemical bonds. Its determination includes a chemist's specifying the molecular geometry and, when feasible and necessary, the electronic structure of the target m ...

of JK-05 has not been disclosed as of October 2014, but it is claimed to be a

small molecule In molecular biology and pharmacology, a small molecule or micromolecule is a low molecular weight (≤ 1000 daltons) organic compound that may regulate a biological process, with a size on the order of 1 nm. Many drugs are small molecules; ...

drug with a comparatively simple structure, which should be readily amenable to synthesis scale-up for mass production if testing is successful. The drug is, however, admitted to be similar to the Japanese anti-influenza drug favipiravir, developed by

Fujifilm , trading as , or simply Fuji, is a Japanese Multinational corporation, multinational Conglomerate (company), conglomerate headquartered in Tokyo, Japan, operating in the areas of photography, optics, Office supplies, office and Biomedical engine ...

Holdings Corp, which has been used effectively to treat patients with Ebola. In addition, WHO committee members mentioned that the drug is a copy product of favipiravir, because patents of favipiravir were already registered in 2006 in China. The drug has been given preliminary approval by the Chinese authorities to be available for Chinese health workers involved in combating the 2014 West African Ebola outbreak, or if Ebola were to spread into mainland China. Several other Chinese developed antiviral drugs with anti-Ebola activity have also been disclosed, but have not progressed so far through development as JK-05.

References

Antiviral drugs Ebola Experimental drugs {{antiinfective-drug-stub

See also

References