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Antigen Recognition Patterns of Intestinal Capillariasis Using Immunoblot-Based Serodiagnosis
Marwa A Hassan1, Maha M A Basyoni1, Marwa F Amer2
1Medical Parasitology Department, Kasr Al-Ainy Faculty of Medicine, Cairo University, El-Manial, Cairo, Egypt.
Insights
This study identifies key proteins for diagnosing intestinal capillariasis using Western blot (WB). These identified protein bands offer a more sensitive diagnostic tool for early detection and treatment of this parasitic infection.
Area of Science:
- Medical Parasitology
- Immunodiagnostics
- Biochemistry
Background:
- Microscopic diagnosis of intestinal capillariasis lacks sensitivity, particularly in low worm burden cases.
- Sensitive and specific diagnostic tools are crucial for early treatment and complication avoidance.
- Western blot (WB) shows promise for antigen recognition in parasitic infections.
Purpose of the Study:
- To identify and evaluate specific proteins from Capillaria crude worm antigens using WB immunodiagnosis.
- To develop improved diagnostic methods for intestinal capillariasis.
Main Methods:
- Capillaria crude worm antigens were extracted and analyzed via SDS-PAGE.
- Serum samples from 60 individuals (intestinal capillariasis, other parasitic infections, healthy controls) were tested.
- WB technique analyzed the reactivity of Capillaria antigens with serum samples.
Main Results:
- WB analysis detected 32 immunoreactive bands (19-110 kDa).
- Key immunodominant proteins (23.5, 31, 36.5, 40.5, 44 kDa) showed high reactivity in capillariasis patients.
- These proteins demonstrated differential reactivity compared to other parasitic infections and control groups.
Conclusions:
- WB immunodiagnosis identified specific protein bands (23.5, 31, 36.5, 40.5, 44 kDa) as potential diagnostic markers.
- These identified protein bands can serve as useful tools for diagnosing intestinal capillariasis.
- The findings support the development of more sensitive diagnostic assays for capillariasis.
Background:
Diagnosis of intestinal capillariasis depending on microscopic detection of parasitic stages is of low sensitivity, especially in cases with low worm burden. There is a necessity to develop sensitive and specific diagnostic tools of capillariasis for early treatment to avoid complications. Western blot (WB) technique showed promising results for antigen recognition patterns in several parasitic infections.
Aim Of The Study:
This study is directed to identify and evaluate relevant proteins of intestinal capillariasis crude worm antigens using WB immunodiagnosis.
Materials And Methods:
Capillaria crude worm antigens were extracted and analyzed using SDS-PAGE. Sixty serum samples belonging to 3 groups (20 individuals each) were included; Group I (shedding Capillaria in feces), Group II (infected with other parasites) and Group III (negative parasitological results). Reactivity of the resulting bands of Capillaria with serum samples was analyzed using WB technique.
Results:
Thirty-two immunoreactive bands were detected in WB analysis representing recognition of proteins with molecular weights (MW) varying from 19 to 110 kDa. Immunodominant proteins of 23.5, 31, 36.5, 40.5 and 44 kDa were recognized, respectively, in 35%, 30%, 85%, 95% and 75% of sera from patients with confirmed capillariasis and in 30%, 25%, 35%, 25%, and 20% of sera from those infected with other parasitic infections. One serum sample from group III gave reaction with 31 kDa band.
Conclusion:
Immunodiagnosis of intestinal capillariasis using WB proved that 23.5, 31, 36.5, 40.5 and 44 kDa bands could be considered useful tools for diagnosis of capillariasis.
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