In silico analysis and molecular characterization of Influenza A (H1N1) pdm09 virus circulating and causing major outbreaks in central India, 2009-2019

  • Arshi Siddiqui Department of Biochemistry, All India Institute of Medical Sciences (AIIMS) Bhopal, Madhya Pradesh, India AND Department of Biotechnology, Barkatullah University, Bhopal, Madhya Pradesh, India
  • Rashmi Chowdhary Mail Department of Biochemistry, All India Institute of Medical Sciences (AIIMS) Bhopal, Madhya Pradesh, India
  • Harjeet Singh Maan Department of Microbiology, State Virology Laboratory, Gandhi Medical College (GMC), Bhopal, Madhya Pradesh, India
  • Sudhir Kumar Goel Department of Biochemistry, All India Institute of Medical Sciences (AIIMS) Bhopal, Madhya Pradesh, India
  • Nidhi Tripathi Department of Biotechnology, Barkatullah University, Bhopal, Madhya Pradesh, India
  • Anil Prakash Department of Biotechnology, Barkatullah University, Bhopal, Madhya Pradesh, India
Keywords:
Influenza A virus, H1N1 subtype;, Haemagglutinin;, Central India

Abstract

Background and Objectives: Influenza A/H1N1pdm09 causes respiratory illness and remains a concern for public health. Since its first emergence in 2009, the virus has been continuously circulating in the form of its genetic variants. Influenza A/H1N1pdm09 surveillance is essential for uncovering emerging variants of epidemiologic and vaccine efficacy. The present study attempts in silico analysis and molecular characterization of Influenza A (H1N1) pdm09 virus circulating and causing major outbreaks in central India during 2009-2019.
Materials and Methods: We have investigated the antigenic drift analysis of 96 isolates’ hemagglutinin (HA) gene sequences (59 central Indian and 37 local Indian and 28 global reference HA gene sequences) of Influenza A/H1N1pdm09 viruses from 2009 to 2019. The study includes mutational (Multiple sequence Alignment), phylogenetic (Maximum Likelihood Method), and statistical analysis (Covariance and correlation) of HA sequences submitted in NCBI, IRD and GISAID from central India.
Results: Phylogenetic analysis indicated maximum clustering of central Indian HA gene sequences in genogroup 6B. Analysis of amino acid sequence alignment revealed changes in receptor binding site (RBS). The frequency of S220T amino acid substitution was found to be high followed by S202T, K300E A273T, K180Q. The Karl Pearson correlation coefficient (r) and covariance between the number of mutations and the death toll was found +0.246 and +100.3 respectively.
Conclusion: The study identifies the continuous genetic variations in the HA gene sequences of circulating Influenza A/H1N1pdm09 in central India from the year 2009 to 2019. Further suggesting importance of monitoring the gradual evolution of the virus with regards to an increase in virulence, pathogenicity and vaccine efficacy timely.

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Published
2020-10-31
How to Cite
1.
Siddiqui A, Chowdhary R, Singh Maan H, Goel S, Tripathi N, Prakash A. In silico analysis and molecular characterization of Influenza A (H1N1) pdm09 virus circulating and causing major outbreaks in central India, 2009-2019. Iran J Microbiol. 12(5):483-494.
Section
Original Article(s)