Antiviral nucleoside analogues containing a substituted benzimid

Details Antiviral nucleoside analogues containing a substituted benzimid Antiviral nucleoside analogues containing a substituted benzimid

1997-04-07

1999-06-15

Richter, Johann

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

5483064, 5483071, 5483074, 5483104, C07D23504, C07D23524, C07D23510

Patent

active

059123567

DESCRIPTION:

BRIEF SUMMARY
The present invention relates to certain purine nucleoside analogues containing a carbocyclic ring in place of the sugar residue, pharmaceutically acceptable derivatives thereof, and their use in medical therapy, particularly for the treatment of certain viral infections.
Hepatitis B virus (HBV) is a small DNA containing virus which infects humans. It is a member of the class of closely related viruses known as the hepadnaviruses, each member of which selectively infects either mammalian or avian hosts, such as the woodchuck and the duck.
Worldwide, HBV is a viral pathogen of major consequence. It is most common in Asian countries, and prevalent in sub-Saharan Africa. The virus is etiologically associated with primary hepatocellular carcinoma and is thought to cause 80% of the world's liver cancer. In the United States more than ten thousand people are hospitalized for HBV illness each year, an average of 250 die with fulminant disease.
The United States currently contains an estimated pool of 500,000-1 million infectious carriers. Chronic active hepatitis will develop in over 25% of carriers, and often progresses to cirrhosis. It is estimated that 5000 people die from HBV-related cirrhosis each year in the USA, and that perhaps 1000 die from HBV-related liver cancer. Even when a universal HBV vaccine is in place, the need for effective anti-HBV compounds will continue. The large reservoir of persistently infected carriers, estimated at 220 million worldwide, will receive no benefit from vaccination and will continue at high risk for HBV-induced liver disease. This carrier population serves as the source of infection of susceptible individuals perpetuating the instance of disease particularly in endemic areas or high risk groups such as IV drug abusers and homosexuals. Thus, there is a great need for effective antiviral agents, both to control the chronic infection and reduce progression to hepatocellular carcinoma.
Clinical effects of infection with HBV range from headache, fever, malaise, nausea, vomiting, anorexia and abdominal pains. Replication of the virus is usually controlled by the immune response, with a course of recovery lasting weeks or months in humans, but infection may be more severe leading to persistent chronic liver disease as outlined above.
In "Viral Infections of Humans" (second edition, Ed., Evans, A. S. (1982) Plenum Publishing Corporation, New York), Chapter 12 describes in detail the etiology of viral hepatitis infections.
Of the DNA viruses, the herpes group is the source of many common viral illnesses in man. The group includes cytomegalovirus (CMV), Epstein-Barr virus (EBV), varicella zoster virus (VZV), herpes simplex virus (HSV) and human herpes virus 6 (HHV6).
In common with other herpes viruses, infection with CMV leads to a life-long association of virus and host and, following a primary infection, virus may be shed for a number of years. Clinical effects range from death and gross disease (microcephaly, hepatosplenemegaly, jaundice, mental retardation) through failure to thrive, susceptibility to chest and ear infections to a lack of any obvious ill effect. CMV infection in AIDS patients is a predominant cause of morbidity as, in 40 to 80% of the adult population, it is present in a latent form and can be reactivated in immunocompromised patients.
EBV causes infectious mononucleosis and is also suggested as the causative agent of nasopharyngeal cancer, immunoblastic lymphoma, Burkitt's lymphoma and hairy leukoplakia.
VZV causes chicken pox and shingles. Chicken pox is the primary disease produced in a host without immunity. In young children, it is usually a mild illness characterized by a vesicular rash and fever. Shingles is the recurrent form of the disease which occurs in adults who were previously infected with varicella. The clinical manifestations of shingles include neuralgia and a vesicular skin rash that is unilateral and dermatomal in distribution. Spread of inflammation may lead to paralysis or convulsions and coma can occur if the meninges becomes affected. I

REFERENCES:
patent: 5534535 (1996-07-01), Townsend et al.

Affiliated with

Also associated with

Rating

Antiviral nucleoside analogues containing a substituted benzimid does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Antiviral nucleoside analogues containing a substituted benzimid, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Antiviral nucleoside analogues containing a substituted benzimid will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-403507