André Correa de Oliveira , Felipe Moura Araujo da Silva , Ingrity Suelen Sá , Maria Luiza Lima da Costa , Sergio Massayoshi Nunomura , Rosemary Aparecida Roque , Rita de Cássia Saraiva Nunomura
{"title":"辣椒科倍半萜伊石华酚B对埃及伊蚊、达林按蚊和致倦库蚊的杀幼虫机理:氧化损伤、防御酶调节和乙酰胆碱酯酶抑制","authors":"André Correa de Oliveira , Felipe Moura Araujo da Silva , Ingrity Suelen Sá , Maria Luiza Lima da Costa , Sergio Massayoshi Nunomura , Rosemary Aparecida Roque , Rita de Cássia Saraiva Nunomura","doi":"10.1016/j.cbi.2025.111719","DOIUrl":null,"url":null,"abstract":"<div><div>Dengue, Oropouche, lymphatic filariasis, and malaria remain serious public health problems in Brazil, transmitted by <em>Aedes aegypti</em>, <em>Culex quinquefasciatus</em>, and <em>Anopheles darlingi</em> resistant to pyrethroid insecticides. As alternatives, plant-derived natural insecticides have gained attention for their potential. In this study, we evaluated ishwarol B for its larvicidal activity and explored its mechanism of action against these mosquitoes. Ishwarol B exhibited larvicidal activity against all larvae (LC<sub>50</sub> from 19.57 to 26.23 μg/mL) and a residual effect of approximately 50 % observed, accompanied by increased production of H<sub>2</sub>O<sub>2</sub> (24.3 ± 5 to 41.0 ± 5 μmol of H<sub>2</sub>O<sub>2</sub> per gram<sup>−1</sup>), lipid peroxidation (11.00 ± 2 to 22.67 ± 2 ηmol of MDA per gram<sup>−1</sup>), and protein oxidation (10.00 ± 1 to 17.00 ± nM of reactive carbonyls/mg protein). Additionally, there was an increase in the activity of SOD (14.33 ± 2 to 14.67 ± 8 mU/mg protein), CAT (10.47 ± 9 to 11.23 ± 1 mmol of H<sub>2</sub>O<sub>2</sub> consumed/min/mg of protein), and GPx (11.91 ± 1 to 16.46 ± 2 mmol NADPH/min/mL). In contrast, AChE activity decreased (8.33 ± 1 to 6.67 ± 2 μmol/min/mg of protein), compared to negative control DMSO (105.30 ± 2 to 111.30 ± 3 μmol μmol/min/mg of protein), indicating enzymatic inhibition, further confirmed by an inhibition from 100 ± 0 to 4.41 ± 2 % (IC<sub>50</sub> of 3.46 μg/mL). Molecular docking revealed a binding energy of −8.4 kcal/mol and Ki = 0.695 μM, indicating a favorable interaction between ishwarol B and the AChE active site including Trp441, Tyr493, Tyr494, Ser280, Phe449, Ile446, Leu444, Gly445, Pro450, and Cys447. These findings confirm the broad mechanism of action of ishwarol B, highlighting its potential as a natural larvicide against the mosquito vectors investigated.</div></div>","PeriodicalId":274,"journal":{"name":"Chemico-Biological Interactions","volume":"420 ","pages":"Article 111719"},"PeriodicalIF":5.4000,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Larvicidal mechanism of the rare sesquiterpene ishwarol B from Piper alatipetiolatum (Piperaceae) against Aedes aegypti, Anopheles darlingi, and Culex quinquefasciatus (Culicidae): oxidative damage, defense enzyme modulation, and acetylcholinesterase inhibition\",\"authors\":\"André Correa de Oliveira , Felipe Moura Araujo da Silva , Ingrity Suelen Sá , Maria Luiza Lima da Costa , Sergio Massayoshi Nunomura , Rosemary Aparecida Roque , Rita de Cássia Saraiva Nunomura\",\"doi\":\"10.1016/j.cbi.2025.111719\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Dengue, Oropouche, lymphatic filariasis, and malaria remain serious public health problems in Brazil, transmitted by <em>Aedes aegypti</em>, <em>Culex quinquefasciatus</em>, and <em>Anopheles darlingi</em> resistant to pyrethroid insecticides. As alternatives, plant-derived natural insecticides have gained attention for their potential. In this study, we evaluated ishwarol B for its larvicidal activity and explored its mechanism of action against these mosquitoes. Ishwarol B exhibited larvicidal activity against all larvae (LC<sub>50</sub> from 19.57 to 26.23 μg/mL) and a residual effect of approximately 50 % observed, accompanied by increased production of H<sub>2</sub>O<sub>2</sub> (24.3 ± 5 to 41.0 ± 5 μmol of H<sub>2</sub>O<sub>2</sub> per gram<sup>−1</sup>), lipid peroxidation (11.00 ± 2 to 22.67 ± 2 ηmol of MDA per gram<sup>−1</sup>), and protein oxidation (10.00 ± 1 to 17.00 ± nM of reactive carbonyls/mg protein). Additionally, there was an increase in the activity of SOD (14.33 ± 2 to 14.67 ± 8 mU/mg protein), CAT (10.47 ± 9 to 11.23 ± 1 mmol of H<sub>2</sub>O<sub>2</sub> consumed/min/mg of protein), and GPx (11.91 ± 1 to 16.46 ± 2 mmol NADPH/min/mL). In contrast, AChE activity decreased (8.33 ± 1 to 6.67 ± 2 μmol/min/mg of protein), compared to negative control DMSO (105.30 ± 2 to 111.30 ± 3 μmol μmol/min/mg of protein), indicating enzymatic inhibition, further confirmed by an inhibition from 100 ± 0 to 4.41 ± 2 % (IC<sub>50</sub> of 3.46 μg/mL). Molecular docking revealed a binding energy of −8.4 kcal/mol and Ki = 0.695 μM, indicating a favorable interaction between ishwarol B and the AChE active site including Trp441, Tyr493, Tyr494, Ser280, Phe449, Ile446, Leu444, Gly445, Pro450, and Cys447. These findings confirm the broad mechanism of action of ishwarol B, highlighting its potential as a natural larvicide against the mosquito vectors investigated.</div></div>\",\"PeriodicalId\":274,\"journal\":{\"name\":\"Chemico-Biological Interactions\",\"volume\":\"420 \",\"pages\":\"Article 111719\"},\"PeriodicalIF\":5.4000,\"publicationDate\":\"2025-08-23\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Chemico-Biological Interactions\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0009279725003497\",\"RegionNum\":2,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"BIOCHEMISTRY & MOLECULAR BIOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chemico-Biological Interactions","FirstCategoryId":"3","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0009279725003497","RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"BIOCHEMISTRY & MOLECULAR BIOLOGY","Score":null,"Total":0}
Larvicidal mechanism of the rare sesquiterpene ishwarol B from Piper alatipetiolatum (Piperaceae) against Aedes aegypti, Anopheles darlingi, and Culex quinquefasciatus (Culicidae): oxidative damage, defense enzyme modulation, and acetylcholinesterase inhibition
Dengue, Oropouche, lymphatic filariasis, and malaria remain serious public health problems in Brazil, transmitted by Aedes aegypti, Culex quinquefasciatus, and Anopheles darlingi resistant to pyrethroid insecticides. As alternatives, plant-derived natural insecticides have gained attention for their potential. In this study, we evaluated ishwarol B for its larvicidal activity and explored its mechanism of action against these mosquitoes. Ishwarol B exhibited larvicidal activity against all larvae (LC50 from 19.57 to 26.23 μg/mL) and a residual effect of approximately 50 % observed, accompanied by increased production of H2O2 (24.3 ± 5 to 41.0 ± 5 μmol of H2O2 per gram−1), lipid peroxidation (11.00 ± 2 to 22.67 ± 2 ηmol of MDA per gram−1), and protein oxidation (10.00 ± 1 to 17.00 ± nM of reactive carbonyls/mg protein). Additionally, there was an increase in the activity of SOD (14.33 ± 2 to 14.67 ± 8 mU/mg protein), CAT (10.47 ± 9 to 11.23 ± 1 mmol of H2O2 consumed/min/mg of protein), and GPx (11.91 ± 1 to 16.46 ± 2 mmol NADPH/min/mL). In contrast, AChE activity decreased (8.33 ± 1 to 6.67 ± 2 μmol/min/mg of protein), compared to negative control DMSO (105.30 ± 2 to 111.30 ± 3 μmol μmol/min/mg of protein), indicating enzymatic inhibition, further confirmed by an inhibition from 100 ± 0 to 4.41 ± 2 % (IC50 of 3.46 μg/mL). Molecular docking revealed a binding energy of −8.4 kcal/mol and Ki = 0.695 μM, indicating a favorable interaction between ishwarol B and the AChE active site including Trp441, Tyr493, Tyr494, Ser280, Phe449, Ile446, Leu444, Gly445, Pro450, and Cys447. These findings confirm the broad mechanism of action of ishwarol B, highlighting its potential as a natural larvicide against the mosquito vectors investigated.
期刊介绍:
Chemico-Biological Interactions publishes research reports and review articles that examine the molecular, cellular, and/or biochemical basis of toxicologically relevant outcomes. Special emphasis is placed on toxicological mechanisms associated with interactions between chemicals and biological systems. Outcomes may include all traditional endpoints caused by synthetic or naturally occurring chemicals, both in vivo and in vitro. Endpoints of interest include, but are not limited to carcinogenesis, mutagenesis, respiratory toxicology, neurotoxicology, reproductive and developmental toxicology, and immunotoxicology.