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Salivary Gland Antigens of Laboratory-Bred Phlebotomus Sergenti and Their Immunogenicity in Human Volunteers in Laboratory Condition Publisher



Veysi A1 ; Mahmoudi A2 ; Yaghoobiershadi M3 ; Jedditehrani M4 ; Rassi Y2 ; Zahraeiramazani A2 ; Hosseinivasoukolaei N5 ; Roshani D6 ; Fatemi M2 ; Khamesipour A7 ; Akhavan A2
Authors
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Authors Affiliations
  1. 1. Zoonoses Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran
  2. 2. Department of Medical Entomology and Vector Control, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
  3. 3. Immunology Research Center, Institute of Immunology and Infectious Diseases, Iran University of Medical Sciences, Tehran, Iran
  4. 4. Monoclonal Antibody Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
  5. 5. Department of Medical Entomology and Vector Control, Health Sciences Research Center, Addiction Institute, Mazandaran University of Medical Sciences, Sari, Iran
  6. 6. Social Determinants of Health Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran
  7. 7. Center for Research and Training in Skin Diseases and Leprosy, Tehran University of Medical Sciences, Tehran, Iran

Source: Asian Pacific Journal of Tropical Medicine Published:2020


Abstract

To investigate Phlebotomus (P.) sergenti Parrot, 1917 (Diptera: Psychodidae) salivary gland antigens and their immune response in human. Methods: Human volunteers were exposed to sand flies' bites in the laboratory, and following each exposure the size of induration was recorded. The mean protein concentration of salivary gland lysate and specific anti-P. sergenti saliva IgG was measured. Sand fly salivary proteins were separated by SDS-PAGE and their immunoreactivity was examined by Western blotting assays. Results: Individuals exposed to P. sergenti salivary gland lysate for 8 months showed both antibody and delayed type hypersensitivity responses, although exposure for one month did not provoke any immune responses. The trend of antibody fluctuated during the exposure time and dropped by the end of antigen loading. The mean protein content was (0.36?0.08) ug in each pair salivary glands. Salivary gland lysate showed 11 to 12 major protein bands and 3 to 6 of them were immunoreactive. Conclusions: Our study showed that the salivary gland components of P. sergenti provoked both cellular and humoral immune responses in human. Furthermore, there are some immunogenic proteins in P. sergenti saliva which could be subjected for further investigation as vector-based vaccine candidate/s against anthroponotic cutaneous leishmaniasis. © 2020 Asian Pacific Journal of Tropical Medicine Produced by Wolters Kluwer- Medknow. All rights reserved.
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