Transfer of maternally-derived immunoglobulin (IgM) to larvae in tilapia,Oreochromis mossambicus

These results suggest that the immune system starts maturing during the post-larval stages

A. TAKEMURA; K. TAKANO

2002

Scholarcy highlights

  • Changes in circulating immunoglobulin during development of larval tilapia,Oreochromis mossambicus, were measured by enzyme-linked immunosorbent assay
  • Low levels of IgM were detected in the larval blood, while relatively high IgM was observed in the larval homogenate
  • During the post-larval stages, IgM levels increased in the larval blood, coinciding with changes in IgM in the larval homogenate
  • These results suggest that the immune system starts maturing during the post-larval stages
  • Identical antibody titre was detected in the blood of prelarvae. These results suggest that antibody raised in the maternal circulation is incorporated into vitellogenic oocytes in the ovary and transferred from the larval yolk sac into the larval circulation
  • In the post-larvae, antibody levels to bovine serum albumin in the larval circulation decreased to background, suggesting that the maternal antibody is metabolised gradually by the larvae during the prelarval stages and does not last through the post-larval stages

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