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Related Experiment Videos

Discrete transcripts encode multiple chitinase isoforms in Brugian microfilariae

K Arnold1, A Venegas, C Houseweart

  • 1Department of Biology, Tufts University, Medford, MA 02155, USA.

Molecular and Biochemical Parasitology
|October 1, 1996
PubMed
Summary

Multiple transcripts encode chitinase isozymes in Brugian nematodes, influencing mosquito infectivity. This study identifies distinct RNA variants for Brugia malayi and Brugia pahangi chitinases.

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Area of Science:

  • Molecular Biology
  • Parasitology
  • Genetics

Background:

  • Brugian nematodes' microfilariae express multiple chitinase isoforms.
  • Chitinase expression correlates with mosquito infectivity.
  • Previous studies identified a single cDNA for Brugia malayi chitinase, despite known isozyme diversity.

Purpose of the Study:

  • To investigate the existence of multiple transcripts encoding Brugian microfilarial chitinases.
  • To characterize transcript variations in Brugia malayi and Brugia pahangi.

Main Methods:

  • Reverse transcription polymerase chain reaction (RT-PCR) using primers from known cDNA.
  • RNAse protection assays to validate transcript authenticity.
  • Cross-species RNAse protection assays for inter-species verification.

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Main Results:

  • Two distinct RT-PCR products were amplified from Brugia malayi microfilarial RNA, differing by a serine/threonine-rich repeat.
  • RNAse protection assays confirmed these products as true transcripts.
  • Novel sequences from Brugia pahangi microfilariae also indicated multiple transcripts for chitinase isozymes.

Conclusions:

  • Multiple transcripts encode chitinase isozymes in Brugian microfilariae.
  • Transcriptional diversity contributes to chitinase isozyme variation in Brugia species.
  • Findings provide a deeper understanding of nematode parasite molecular mechanisms and host interactions.