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Anthelminthic Agents01:15

Anthelminthic Agents

Anthelmintic drugs differ significantly from antiparasitic therapies targeting protozoa, primarily due to differences in parasite biology. Whereas most protozoal treatments act on proliferating cells, anthelmintics are typically directed against mature, nonproliferative helminths. The therapeutic approach considers the helminth's reliance on neuromuscular coordination, glucose metabolism, and microtubular integrity for survival, reproduction, and localization within the host. Most anthelmintics...

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Intestinally implanted Nippostrongylus brasiliensis adult worms decrease serum paraoxonase-1 activity in rats.

Ayman Samir Farid1, Toshiyuki Shimohira, Ikuo Kobayashi

  • 1Laboratory of Parasitic Diseases, Faculty of Agriculture, University of Miyazaki, Gakuen-Kibanadai, Nishi 1-1, Miyazaki 889-2192, Japan.

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Summary
This summary is machine-generated.

Serum paraoxonase (PON1) activity significantly decreased during the intestinal phase of Nippostrongylus brasiliensis infection in rats. Antioxidant treatment did not prevent this reduction, suggesting a complex mechanism beyond oxidative stress.

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Area of Science:

  • Immunoparasitology
  • Biochemistry
  • Host-pathogen interactions

Background:

  • Previous studies linked Nippostrongylus brasiliensis infection to decreased serum paraoxonase (PON1) activity during the migratory phase.
  • The impact of the intestinal phase and associated oxidative stress on PON1 activity remained unclear.

Purpose of the Study:

  • To investigate the effect of the intestinal phase of N. brasiliensis infection on serum PON1 activity.
  • To explore the role of oxidative stress in modulating PON1 activity during this parasitic infection.

Main Methods:

  • Wistar rats were infected with adult N. brasiliensis worms.
  • Serum PON1 (paraoxonase and arylesterase) activities were measured on specific days post-infection.
  • Pro-inflammatory cytokines were assessed.
  • The effect of antioxidant butylated hydroxyanisole (BHA) was evaluated.

Main Results:

  • A significant reduction in serum paraoxonase and arylesterase activity was observed on days 6 and 9 post-infection.
  • No significant increase in pro-inflammatory cytokines was detected during this phase.
  • Administration of the antioxidant BHA did not restore the diminished PON1 activity.

Conclusions:

  • The intestinal phase of N. ดังนั้น brasiliensis infection leads to a significant decrease in serum PON1 activity.
  • This reduction is not directly linked to increased pro-inflammatory cytokines or ameliorated by antioxidant treatment, suggesting alternative mechanisms.
  • Further research is needed to elucidate the precise mechanisms underlying PON1 activity alterations during the prolonged intestinal phase of gastrointestinal nematode infections.