Polysaccharide fraction of the hemi-parasitic mistletoe, Dendrophthoe falcata (L) Ettingsh leaves enhances innate immune responses and disease resistance in Oreochromis niloticus (Linnaeus)

  • Konda Subramanian Shalini Centre for Fish Immunology, School of Life Sciences, Vels University, Pallavaram, Chennai 600117, India
  • Omita Yengkhom Centre for Fish Immunology, School of Life Sciences, Vels University, Pallavaram, Chennai 600117, India
  • Parasuraman Aiya Subramani Centre for Fish Immunology, School of Life Sciences, Vels University, Pallavaram, Chennai 600117, India
  • Dinakaran Michael R Centre for Fish Immunology, School of Life Sciences, Vels University, Pallavaram, Chennai 600117, India

Abstract

In aquaculture, diseases and disease-outbreak are a major factor limiting its sustainability. Immunostimulants are an effective alternative to antibiotics, chemotherapeutics and perhaps even vaccines. Immunostimulants are a promising and safe prophylactic measure against infectious diseases. In this study, the immunostimulatory effect of the neutral water-soluble polysaccharide fraction (PF) isolated from the leaves of the hemi-parasitic mistletoe, Dendrophthoe falcata (DF) was assessed in Nile tilapia, Oreochromis niloticus. Fish weighing 40±5 g were injected intraperitoneally with Dendrophthoe falcata polysaccharide fraction (DFPF) at a dose of 2, 20 or 200 mgkg-1. An untreated control group and a positive control group (MacroGard™, 20 mgkg-1) were also maintained. The serum lysozyme, myeloperoxidase, antiprotease and bactericidal activities were significantly enhanced on post-treatment days when compared with that of the untreated control. In the challenge studies, after 7 and 21 days’ administration of DFPF, the high dose of 200 mgkg-1 caused a significant reduction in percent mortality against Aeromonas hydrophila infection. By semi-quantitative gene expression analysis, it was found that there was also a significant upregulation of IL-1β and lysozyme genes. After field trials, DFPF can be applied as an immunostimulant to finfish in aquaculture.

Keywords: Dendrophthoe falcata, Polysaccharide fraction, Immunostimulant, Non-specific immune response, Disease resistance, Gene expression, Oreochromis niloticus

Downloads

Download data is not yet available.
Published
2019-01-05
Citations
How to Cite
Konda Subramanian Shalini, Omita Yengkhom, Parasuraman Aiya Subramani, & Dinakaran Michael R. (2019). Polysaccharide fraction of the hemi-parasitic mistletoe, Dendrophthoe falcata (L) Ettingsh leaves enhances innate immune responses and disease resistance in Oreochromis niloticus (Linnaeus). International Journal of Research in Pharmaceutical Sciences, 10(1), 56-64. Retrieved from https://www.pharmascope.org/index.php/ijrps/article/view/11
Section
Original Articles
Article Level Metrix
Abstract Views: 37
PDF Downloaded: 17