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Scientists Reveal How Mosquitoes Are Able to Smell Humans Even Without Antennae_我的网站

A |     本报讯 特约记者张旭报道 日前，兴城市“两优一先”表彰大会召开，共同庆祝中国共产党成立103周年，表彰兴城市优秀共产党员、优秀党务工作者和先进基层党组织，激励全市各级党组织和广大党员干部以习近平新时代中国特色社会主义思想为指导，全面贯彻落实党的二十大和二十届二中全会精神，崇尚先进、学习先进、争当先进，为推动新时代振兴发展建功立业。兴城市委书记陈玮出席会议并讲话，兴城市市长李兆瑞主持会议。    Mosquitoes use the body odor, heat, and carbon dioxide that humans emit, varying from person to person, to find their next meal. The study, which was published in the scientific journal Cell, reveals that mosquitoes may perceive odors via a variety of distinct pathways, in contrast to animals, which have a single set of neurons that detect each sort of odor.,Female mosquitoes use the variety of odors that people and other animals produce to find the blood that will feed their eggs. The olfactory neurons in the insects' antennae, which are where they take up scents, detect and send scent information to the brain.,Groups of human-odor receptors on the olfactory neurons in the antennae of female mosquitoes (Aedes aegypti) were rendered inactive by the study's lead author Meg Younger and her colleagues at Boston University in Massachusetts using the gene editing tool CRISPR.,"We found that there’s a real difference in the way mosquitoes encode the odors that they encounter compared to what we’ve learned from other animals,” Younger is quoted as saying in the Guardian report on the findings.,According to Younger, the scientists believed that mosquitoes would adhere to the core tenet of olfaction, which states that each neuron expresses only one type of receptor.,“Instead, what we’ve seen is that different receptors can respond to different odors in the same neuron," she added.,This reportedly suggests that mosquitoes can still detect human odors after losing one or more receptors. The researchers asserted that this backup system may have developed as a survival mechanism.,"The mosquito Aedes aegypti is specialized to bite humans, and it is believed that they evolved to do that because humans are always close to fresh water and mosquitoes lay their eggs in fresh water. We are basically the perfect meal, so the drive to find humans is extremely strong," Younger explained,In the end, the researchers argued, knowing how the mosquito brain perceives human odor could be used to influence biting behavior and stop the spread of diseases like malaria, dengue fever, and yellow fever that are transmitted by those insects.,"One major strategy for controlling mosquitoes is to attract them to traps to remove them from the biting population. If we could use this knowledge to understand how human odor is represented in the mosquito antennae and brain, we could develop blends that are more attractive to mosquitoes than we are. We could also develop repellants that target those receptors and neurons that detect human odor," Younger concluded.,Notably, Christopher Potter at Johns Hopkins School of Medicine in Maryland recently found a similar phenomenon in fruit flies, or Drosophila melanogaster.,“If one of these types of olfactory receptors is mutated or no longer functioning, there’s this backup system," Potter is quoted as saying in the New Scientist report. “It’s changing the dogma of what we thought we knew about the olfactory system.”,Science & TechSmell of Blood: Mosquitoes' Scent-Based Host-Seeking Mechanism Revealed16 May, 05:54 GMT。         　　陈玮指出，今年以来，兴城市扎实推进全面振兴新突破三年行动，经济运行稳中有进、进中向好、好中提质，重大项目领跑全市，三次产业提质增效，文旅产业蓬勃发展，民生保障能力显著增强，社会大局和谐稳定、综合实力显著提升，取得了攻坚之年首季开门红。

B | 好态势、好局面来之不易，凝聚着兴城市各级党组织、全体共产党员的心血和汗水，得益于基层党组织战斗堡垒作用和党员先锋模范作用的充分发挥。全市各级党组织和广大党员干部要进一步统一思想、凝聚意志、汇聚合力，以最坚定的立场、最自觉的行动、最昂扬的干劲拼出好样子、干出新辉煌。         　　陈玮强调，要在坚定理想信念上争当先锋、作出表率，把树牢“四个意识”、坚定“四个自信”、做到“两个维护”植根思想、融入血脉，自觉在思想上政治上行动上同以习近平同志为核心的党中央保持高度一致；要在勇挑发展重担上争当先锋、作出表率，坚持以高质量实施“十四五”规划为引领，锚定全面振兴目标不动摇，树牢“成绩单”导向，营造你追我赶、奋勇争先的良好氛围，以党的政治功能、组织功能的大突破推动经济社会的大跨越；要在坚守为民初心上争当先锋、作出表率，以“人民对美好生活的向往就是我们的奋斗目标”的执着追求，真正把惠民生、暖民心举措落到实处，不断凝聚党心民心；要在全面从严治党上争当先锋、作出表率，认真贯彻新时代党的建设总要求和组织路线，全面推进党的政治建设、思想建设、组织建设、作风建设、纪律建设，以过硬的党建成效引领经济社会高质量发展，谱写中国式现代化兴城新篇章。         　　会议宣读了《中共兴城市委关于表彰全市优秀共产党员、优秀党务工作者和先进基层党组织的决定》，并为优秀共产党员、优秀党务工作者和先进基层党组织进行颁奖；李晓明、张翼、徐红三位受表彰代表作了发言。         　　兴城市委常委，兴城市人大常委会、市政府、市政协领导班子成员及其他副县级以上领导参加会议。

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