ISED can be publicly accessed from any Web browser athttp://influenza.korea.ac.kr. == FUNDING == Korea Cefonicid sodium National Institute of Health (2008-E00179); BioGreen 21 system give (20080401-034-008) and the Basic Research Program of the Korea Technology & Engineering Basis. application tools to analyze sequence alignment and different patterns and allows users to visualize epitope-matching constructions, which is freely accessible athttp://influenza.korea.ac.krandhttp://influenza.cdc.go.kr. == Intro == Influenza is one of the most important respiratory infectious diseases of humans. It is estimated that influenza is responsible for 250 000500 000 deaths yearly (1). The 1918 pandemic resulted in the deaths of 2050 million on Cefonicid sodium a global scale, which was probably one of the most devastating disease outbreaks in human history (2). Influenza viruses of the familyOrthomyxoviridaecontain eight single-stranded negative-sense RNA molecules which encode a total of 11 proteins. Three antigenically unique disease typesA, B and Ccirculate in human being populations (3). Antigenic drift of the viruses makes the existing vaccines ineffective and antigenic shift creates fresh strains which may cause worldwide pandemic. Genome sequences of currently circulating disease isolates are important sources of information about influenza. Recent developments in viral genome sequencing, antigenic mapping and epidemiological modeling are greatly improving our knowledge of the development of human being influenza disease (46). However, many aspects of the evolutionary and epidemiological dynamics of influenza viruses are still far from total. Significant efforts have been made to build general public resources of influenza viruses, such as the Influenza Disease Source (http://www.ncbi.nlm.nih.gov/genomes/FLU/FLU.html) in the National Center for Biotechnology Info (NCBI), the Influenza Sequence Database at Los Alamos National Laboratory, the Influenza Disease Database (http://influenza.genomics.org.cn) in the Beijing Institute of Genomics and the BioHealthBase Bioinformatics Source Center (http://www.biohealthbase.org) (710). An increasing quantity of genomes of influenza viruses have been sequenced in Asia in recent years. Southern China has long been regarded as a potential epicenter for emergence of pandemic influenza viruses (11) and becomes one of the major foci for viral monitoring. Tropical areas may function as long term combining swimming pools for viruses from around the world, providing ideal resource populations because of extended viral transmission (12). Knowledge about the genomes of the seasonal influenza viruses from different countries in Asia is definitely important for monitoring and understanding of the development and migration of strains. Rabbit Polyclonal to KITH_HHV11 Since 1968, Korea National Institute of Health (KNIH) offers performed influenza disease isolation as part of the World Health Organization’s influenza monitoring network. In 2000, Cefonicid sodium the Korean Influenza Monitoring Scheme was founded as a clinical and laboratory surveillance network including general public health centers and private clinics (13). Sentinel physicians statement instances of influenza-like illness weekly and ahead specimens to KNIH for disease isolation and characterization. KNIH offers sequenced the isolates of influenza viruses collected in Korea, which have been authorized to GenBank in the NCBI. New insights into immunity initiated by hostpathogen connection are changing the way we think about pathogenesis of influenza. The immune response to influenza disease infection is directed against numerous epitopes of antigens. Two important surface glycoproteins hemagglutinin (HA) and neuraminidase (NA) mutate at high frequencies under the strong selective pressure of the host’s immune system (14). Epitopes can be used to monitor immune response and a single amino acid mutation at the key residue of the epitope is frequently sufficient to cause an antigenic switch (15). High-level antiviral drug resistance can also be conferred by solitary amino acid substitutions (16). Over the years, influenza antiviral drug resistance has grown rapidly despite the efficacy of the drugs comparable to that of vaccines. In order to leverage the wealth of info from such data, we have developed a user friendly relational database, Influenza Sequence and Epitope Database (ISED), particularly focusing on the genomes of the seasonal influenza viruses from Asian countries. We have added value by implementing a suite of bioinformatics tools that can be used to analyze and visualize the influenza data. This freely accessible source will augment influenza study and contribute to improved general public heath. == OVERVIEW OF THE DATABASE == ISED was designed to collect, store and provide sequence info on influenza viruses including drug-resistant strains, conjoined to research tools for sequence pattern and epitope structural analyses of the data. At present, ISED includes info on 16 004 influenza sequences (13 020 influenza A and 2984 influenza B viruses) including those from nine Asian countries (China, Japan, Korea, Malaysia, Philippines, Singapore, Taiwan, Thailand and Vietnam) (Table 1). It also hosts 545 drug-resistant influenza sequences against amantadine collected in Korea (Table 2). No drug-resistant influenza isolates were found in Korea against oseltamivir and zanamivir. Influenza disease sequences collected in Korea are authorized and.