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Cellular stress and activity of biomarkers enzymes in Africanized honeybees Apis mellifera Lineu, 1758 (Hymenoptera, Apidae) exposed to thiamethoxam

Grant number: 14/23197-7
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): March 01, 2015
Effective date (End): March 31, 2019
Field of knowledge:Biological Sciences - Zoology - Applied Zoology
Cooperation agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
Principal Investigator:Osmar Malaspina
Grantee:Pâmela Decio Horst
Home Institution: Centro de Estudos de Insetos Sociais (CEIS). Universidade Estadual Paulista (UNESP). Campus de Rio Claro. Rio Claro , SP, Brazil
Associated research grant:12/50197-2 - Action of products used in cultivation of sugar cane on non-target organisms, AP.BIOEN.TEM
Associated scholarship(s):15/22368-5 - Analysis of expression ELAV and Dscam genes in Apis mellifera (Hymenoptera: Apidae) exposed to thiamethoxam, BE.EP.DR

Abstract

Africanized Apis mellifera are considered important pollinators in Brazil, once many food crops depend on pollination promoted by these insects. However, with the growth of agricultural productivity, the use of insecticides for pest control increased, affecting beneficial insects too. After sharp losses in the number of bee colonies in the northern hemisphere, with the action of insecticides as one possible cause of this disappearance, studies about effects of pesticides on bees became more relevant. The present study aims to investigate the effects of sublethal dose of thiamethoxam, an important insecticide from the class of neonicotinoids, in the gut and brain of Apis mellifera Africanized, through the evaluation of the activity of enzymes related to the antioxidant process (Superoxide Dismutase, Glutathione Peroxidase and Catalase) and biomarkers enzymes of exposure (Carboxylesterase and Glutathione S-Transferase). In addition, the project aims to evaluate the activities of Acetylcholinesterase, responsible for mediating the transmission of nerve impulses in the brain, and digestive enzyme Alkaline Phosphatase in the intestine, of foraging bees. The level of cellular stress will be investigated with marking HSP 70 proteins and evaluation cell death, through confocal microscopy. The results obtained will contribute with data that may support arguments in the search of sustainable use and management of these pollinators in agricultural areas and also to lead the discussion on the laws regulating the use of these pesticides. (AU)

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
DECIO, PAMELA; USTAOGLU, PINAR; ROAT, THAISA C.; MALASPINA, OSMAR; DEVAUD, JEAN-MARC; STOGER, REINHARD; SOLLER, MATTHIAS. Acute thiamethoxam toxicity in honeybees is not enhanced by common fungicide and herbicide and lacks stress-induced changes in mRNA splicing. SCIENTIFIC REPORTS, v. 9, DEC 16 2019. Web of Science Citations: 0.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.