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Tang Y, Liu F, Lu L, Liu A, Ye H. Identification of ETH receptor and its possible roles in the mud crab Scylla paramamosain. Comp Biochem Physiol A Mol Integr Physiol 2024; 297:111692. [PMID: 38977174 DOI: 10.1016/j.cbpa.2024.111692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2024] [Revised: 07/01/2024] [Accepted: 07/01/2024] [Indexed: 07/10/2024]
Abstract
Ecdysis-triggering hormone (ETH) is a neuropeptide hormone characterized by a conserved KxxKxxPRx amide structure widely identified in arthropods. While its involvement in the regulation of molting and reproduction in insects is well-established, its role in crustaceans has been overlooked. This study aimed to de-orphanise a receptor for ETH in the mud crab Scylla paramamosain and explore its potential impact on ovarian development. A 513-amino-acid G protein-coupled receptor for ETH (SpETHR) was identified in S. paramamosain, exhibiting a dose-dependent activation by SpETH with an EC50 value of 75.18 nM. Tissue distribution analysis revealed SpETH was in the cerebral ganglion and thoracic ganglion, while SpETHR was specifically expressed in the ovary, hepatopancreas, and Y-organ of female crabs. In vitro experiments demonstrated that synthetic SpETH (at a concentration of 10-8 M) significantly increased the expression of SpVgR in the ovary and induced ecdysone biosynthesis in the Y-organ. In vivo experiments showed a significant upregulation of SpEcR in the ovary and Disembodied and Shadow in the Y-organ after 12 h of SpETH injection. Furthermore, a 16-day administration of SpETH significantly increased 20E titers in hemolymph, gonadosomatic index (GSI) and oocyte size of S. paramamosain. In conclusion, our findings suggest that SpETH may play stimulatory roles in ovarian development and ecdysone biosynthesis by the Y-organ.
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Affiliation(s)
- Yiwei Tang
- State Key Laboratory of Mariculture Breeding, Fisheries College of Jimei University, Xiamen 361021, China
| | - Fang Liu
- State Key Laboratory of Mariculture Breeding, Fisheries College of Jimei University, Xiamen 361021, China
| | - Li Lu
- State Key Laboratory of Mariculture Breeding, Fisheries College of Jimei University, Xiamen 361021, China
| | - An Liu
- State Key Laboratory of Mariculture Breeding, Fisheries College of Jimei University, Xiamen 361021, China.
| | - Haihui Ye
- State Key Laboratory of Mariculture Breeding, Fisheries College of Jimei University, Xiamen 361021, China.
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2
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Kurogi Y, Mizuno Y, Okamoto N, Barton L, Niwa R. The seminal vesicle is a juvenile hormone-responsive tissue in adult male Drosophila melanogaster. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.03.20.585833. [PMID: 38562788 PMCID: PMC10983971 DOI: 10.1101/2024.03.20.585833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Juvenile hormone (JH) is one of the most essential hormones controlling insect metamorphosis and physiology. While it is well known that JH affects many tissues throughout the insects life cycle, the difference in JH responsiveness and the repertoire of JH-inducible genes among different tissues has not been fully investigated. In this study, we monitored JH responsiveness in vivo using transgenic Drosophila melanogaster flies carrying a JH response element-GFP (JHRE-GFP) construct. Our data highlight the high responsiveness of the epithelial cells within the seminal vesicle, a component of the male reproductive tract, to JH. Specifically, we observe an elevation in the JHRE-GFP signal within the seminal vesicle epithelium upon JH analog administration, while suppression occurs upon knockdown of genes encoding the intracellular JH receptors, Methoprene-tolerant and germ cell-expressed. Starting from published transcriptomic and proteomics datasets, we next identified Lactate dehydrogenase as a JH-response gene expressed in the seminal vesicle epithelium, suggesting insect seminal vesicles undergo metabolic regulation by JH. Together, this study sheds new light on biology of the insect reproductive regulatory system.
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Affiliation(s)
- Yoshitomo Kurogi
- Graduate School of Science and Technology, University of Tsukuba, Ibaraki 305-8577, Japan
| | - Yosuke Mizuno
- Graduate School of Science and Technology, University of Tsukuba, Ibaraki 305-8577, Japan
| | - Naoki Okamoto
- Life Science Center for Survival Dynamics, Tsukuba Advanced Research Alliance (TARA), University of Tsukuba, Ibaraki 305-8577, Japan
| | - Lacy Barton
- Department of Neuroscience, Developmental and Regenerative Biology, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA
| | - Ryusuke Niwa
- Life Science Center for Survival Dynamics, Tsukuba Advanced Research Alliance (TARA), University of Tsukuba, Ibaraki 305-8577, Japan
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3
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Usman D, Abubakar MB, Ibrahim KG, Imam MU. Iron chelation and supplementation: A comparison in the management of inflammatory bowel disease using drosophila. Life Sci 2024; 336:122328. [PMID: 38061132 DOI: 10.1016/j.lfs.2023.122328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Revised: 11/20/2023] [Accepted: 11/30/2023] [Indexed: 12/24/2023]
Abstract
AIMS Inflammatory Bowel Disease (IBD) is associated with systemic iron deficiency and has been managed with iron supplements which cause adverse side effects. Conversely, some reports highlight iron depletion to ameliorate IBD. The underlying intestinal response and comparative benefit of iron depletion and supplementation in IBD is unknown. The aims of this work were to characterize and compare the effects of iron supplementation and iron depletion in IBD. MAIN METHODS IBD was induced in Drosophila melanogaster using 3 % dextran sodium sulfate (DSS) in diet for 7 days. Using this model, we investigated the impacts of acute iron depletion (using bathophenanthroline disulfonate, BPS) and supplementation (using ferrous sulphate, FS), before and after IBD induction, on gut iron homeostasis, cell death, gut permeability, inflammation, antioxidant defence, antimicrobial response and several fly phenotypes. KEY FINDINGS DSS decreased fly mass (p < 0.001), increased gut permeability (p < 0.001) and shortened lifespan (p = 0.035) compared to control. The DSS-fed flies also showed significantly elevated lipid peroxidation (p < 0.001), and the upregulated expression of apoptotic marker- drice (p < 0.001), tight junction protein - bbg (p < 0.001), antimicrobial peptide - dpta (p = 0.002) and proinflammatory cytokine - upd2 (p < 0.001). BPS significantly (p < 0.05) increased fly mass and lifespan, decreased gut permeability, decreased lipid peroxidation and decreased levels of drice, bbg, dpta and upd2 in IBD flies. This iron chelation (using BPS) showed better protection from DSS-induced IBD than iron supplementation (using FS). Preventive and curative interventions, by BPS or FS, also differed in outcomes. SIGNIFICANCE This may inform precise management strategies aimed at tackling IBD and its recurrence.
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Affiliation(s)
- Dawoud Usman
- Centre for Advanced Medical Research and Training, Usmanu Danfodiyo University Sokoto, Nigeria; Department of Physiology, College of Health Sciences, Usmanu Danfodiyo University Sokoto, Nigeria
| | - Murtala Bello Abubakar
- Centre for Advanced Medical Research and Training, Usmanu Danfodiyo University Sokoto, Nigeria; Department of Physiology, College of Health Sciences, Usmanu Danfodiyo University Sokoto, Nigeria; Department of Physiology, College of Medicine and Health Sciences, Baze University, Abuja, Nigeria
| | - Kasimu Ghandi Ibrahim
- Centre for Advanced Medical Research and Training, Usmanu Danfodiyo University Sokoto, Nigeria; Department of Physiology, College of Health Sciences, Usmanu Danfodiyo University Sokoto, Nigeria; Department of Basic Medical and Dental Sciences, Faculty of Dentistry, Zarqa University, P. O. Box 2000, Zarqa 13110, Jordan; School of Physiology, Faculty of Health Sciences, University of the Witwatersrand, 7 York Road, Parktown 2193, Johannesburg, South Africa
| | - Mustapha Umar Imam
- Centre for Advanced Medical Research and Training, Usmanu Danfodiyo University Sokoto, Nigeria; Department of Medical Biochemistry, College of Health Sciences, Usmanu Danfodiyo University Sokoto, Nigeria.
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4
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Malhotra P, Basu S. The Intricate Role of Ecdysis Triggering Hormone Signaling in Insect Development and Reproductive Regulation. INSECTS 2023; 14:711. [PMID: 37623421 PMCID: PMC10455322 DOI: 10.3390/insects14080711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 08/10/2023] [Accepted: 08/12/2023] [Indexed: 08/26/2023]
Abstract
Insect growth is interrupted by molts, during which the insect develops a new exoskeleton. The exoskeleton confers protection and undergoes shedding between each developmental stage through an evolutionarily conserved and ordered sequence of behaviors, collectively referred to as ecdysis. Ecdysis is triggered by Ecdysis triggering hormone (ETH) synthesized and secreted from peripheral Inka cells on the tracheal surface and plays a vital role in the orchestration of ecdysis in insects and possibly in other arthropod species. ETH synthesized by Inka cells then binds to ETH receptor (ETHR) present on the peptidergic neurons in the central nervous system (CNS) to facilitate synthesis of various other neuropeptides involved in ecdysis. The mechanism of ETH function on ecdysis has been well investigated in holometabolous insects such as moths Manduca sexta and Bombyx mori, fruit fly Drosophila melanogaster, the yellow fever mosquito Aedes aegypti and beetle Tribolium castaneum etc. In contrast, very little information is available about the role of ETH in sequential and gradual growth and developmental changes associated with ecdysis in hemimetabolous insects. Recent studies have identified ETH precursors and characterized functional and biochemical features of ETH and ETHR in a hemimetabolous insect, desert locust, Schistocerca gregaria. Recently, the role of ETH in Juvenile hormone (JH) mediated courtship short-term memory (STM) retention and long-term courtship memory regulation and retention have also been investigated in adult male Drosophila. Our review provides a novel synthesis of ETH signaling cascades and responses in various insects triggering diverse functions in adults and juvenile insects including their development and reproductive regulation and might allow researchers to develop sustainable pest management strategies by identifying novel compounds and targets.
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Affiliation(s)
| | - Saumik Basu
- Department of Entomology, Washington State University, Pullman, WA 99164, USA;
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5
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Goncharova AA, Besedina NG, Bragina JV, Danilenkova LV, Kamysheva EA, Fedotov SA. Courtship suppression in Drosophila melanogaster: The role of mating failure. PLoS One 2023; 18:e0290048. [PMID: 37561803 PMCID: PMC10414572 DOI: 10.1371/journal.pone.0290048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 07/31/2023] [Indexed: 08/12/2023] Open
Abstract
Drosophila melanogaster is a popular model organism in the study of memory due to a wide arsenal of methods used to analyze neuronal activity. The most commonly used tests in research of behavioral plasticity are shock avoidance associated with chemosensory cues and courtship suppression after mating failure. Many authors emphasize the value of courtship suppression as a model of behavior most appropriate to natural conditions. However, researchers often investigate courtship suppression using immobilized and decapitated females as targets of courtship by males, which makes the data obtained from such flies less valuable. In our study, we evaluate courtship suppression towards immature mobile non-receptive females after training with mated or immature females combined with an aversive stimulus (quinine). We have shown that the previously described mechanisms of courtship suppression, as a result of the association of the courtship object with the repellent, as well as due to increased sensitivity to the anti-aphrodisiac cVA after mating failure, are not confirmed when immature mobile females are used. We discuss the reasons for the discrepancies between our results and literature data, define the conditions to be met in the courtship suppression test if the aim is to analyze the natural forms of behavioral plasticity, and present data on the test modifications to approximate conditions to natural ones.
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Affiliation(s)
- Anna A. Goncharova
- Laboratory of Comparative Behavioral Genetics, Pavlov Institute of Physiology, Russian Academy of Sciences, St. Petersburg, Russia
| | - Natalia G. Besedina
- Laboratory of Comparative Behavioral Genetics, Pavlov Institute of Physiology, Russian Academy of Sciences, St. Petersburg, Russia
| | - Julia V. Bragina
- Laboratory of Comparative Behavioral Genetics, Pavlov Institute of Physiology, Russian Academy of Sciences, St. Petersburg, Russia
| | - Larisa V. Danilenkova
- Laboratory of Comparative Behavioral Genetics, Pavlov Institute of Physiology, Russian Academy of Sciences, St. Petersburg, Russia
| | - Elena A. Kamysheva
- Laboratory of Comparative Behavioral Genetics, Pavlov Institute of Physiology, Russian Academy of Sciences, St. Petersburg, Russia
| | - Sergei A. Fedotov
- Laboratory of Comparative Behavioral Genetics, Pavlov Institute of Physiology, Russian Academy of Sciences, St. Petersburg, Russia
- Laboratory of Toxinology and Molecular Systematics, L.A. Orbeli Institute of Physiology, National Academy of Sciences of the Republic of Armenia, Yerevan, Armenia
- Laboratory of Amyloid Biology, Saint Petersburg University, St. Petersburg, Russia
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6
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Inami S, Sakai T. Circadian photoreceptors are required for light-dependent maintenance of long-term memory in Drosophila. Neurosci Res 2022; 185:62-66. [PMID: 36096270 DOI: 10.1016/j.neures.2022.09.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 08/30/2022] [Accepted: 09/06/2022] [Indexed: 11/15/2022]
Abstract
In the fruit fly Drosophila melanogaster, environmental light is required for maintaining long-term memory (LTM). Furthermore, the Pigment dispersing factor (Pdf), which is a circadian neuropeptide, and the neuronal activity of Pdf neurons are essential for light-dependent maintenance of courtship LTM. Since Pdf neurons can sense light directly via circadian photoreceptors [Rhodopsin 7 (Rh7) and Cryptochrome (Cry)], it is possible that Rh7 and Cry in Pdf neurons are involved in the maintenance of LTM. In this study, using a courtship conditioning assay, we demonstrated that circadian photoreceptors in Pdf neurons are required for maintaining courtship LTM.
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Affiliation(s)
- Show Inami
- Department of Biological Sciences, Tokyo Metropolitan University, Tokyo 192-0397, Japan
| | - Takaomi Sakai
- Department of Biological Sciences, Tokyo Metropolitan University, Tokyo 192-0397, Japan.
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Meiselman MR, Ganguly A, Dahanukar A, Adams ME. Endocrine modulation of primary chemosensory neurons regulates Drosophila courtship behavior. PLoS Genet 2022; 18:e1010357. [PMID: 35998183 PMCID: PMC9439213 DOI: 10.1371/journal.pgen.1010357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 09/02/2022] [Accepted: 07/27/2022] [Indexed: 11/19/2022] Open
Abstract
The decision to engage in courtship depends on external cues from potential mates and internal cues related to maturation, health, and experience. Hormones allow for coordinated conveyance of such information to peripheral tissues. Here, we show Ecdysis-Triggering Hormone (ETH) is critical for courtship inhibition after completion of copulation in Drosophila melanogaster. ETH deficiency relieves post-copulation courtship inhibition (PCCI) and increases male-male courtship. ETH appears to modulate perception and attractiveness of potential mates by direct action on primary chemosensory neurons. Knockdown of ETH receptor (ETHR) expression in GR32A-expressing neurons leads to reduced ligand sensitivity and elevated male-male courtship. We find OR67D also is critical for normal levels of PCCI after mating. ETHR knockdown in OR67D-expressing neurons or GR32A-expressing neurons relieves PCCI. Finally, ETHR silencing in the corpus allatum (CA), the sole source of juvenile hormone, also relieves PCCI; treatment with the juvenile hormone analog methoprene partially restores normal post-mating behavior. We find that ETH, a stress-sensitive reproductive hormone, appears to coordinate multiple sensory modalities to guide Drosophila male courtship behaviors, especially after mating. The decision of when to reproduce is paramount for organismal survival. In models like mice and flies, we have a comprehensive understanding of neuronal substrates for perception of mates and courtship drive, but how these substrates adapt to malleable internal and external environments remains unclear. Here, we show that post-mating refractoriness depends upon a peptide hormone, Ecdysis-Triggering Hormone (ETH). We show repression of courtship toward recently-mated females depends upon pheromone cues and that ETH deficiency impairs perception of female matedness. ETH signaling appears to promote the activity and function of pheromone-sensing primary olfactory and gustatory sensory neurons. Additionally, ETH sets internal levels of Juvenile Hormone, a hormone known to inhibit courtship drive in flies. Elimination of ETH or its receptor in primary sensory neurons or the glandular source of Juvenile Hormone reduces male post-copulation courtship inhibition (PCCI), causing continued courtship toward female counterparts after successful mating. Our data suggest ETH and its targets are critical for post-mating refractoriness in males.
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Affiliation(s)
- Matthew R. Meiselman
- Graduate Program in Cell, Molecular and Developmental Biology, University of California, Riverside, California, United States of America
- Department of Molecular, Cell, and Systems Biology, University of California, Riverside, California, United States of America
- * E-mail: (MRM); (MEA)
| | - Anindya Ganguly
- Department of Molecular, Cell, and Systems Biology, University of California, Riverside, California, United States of America
- Graduate Program in Neuroscience, University of California, Riverside, California, United States of America
| | - Anupama Dahanukar
- Graduate Program in Cell, Molecular and Developmental Biology, University of California, Riverside, California, United States of America
- Department of Molecular, Cell, and Systems Biology, University of California, Riverside, California, United States of America
- Graduate Program in Neuroscience, University of California, Riverside, California, United States of America
| | - Michael E. Adams
- Graduate Program in Cell, Molecular and Developmental Biology, University of California, Riverside, California, United States of America
- Department of Molecular, Cell, and Systems Biology, University of California, Riverside, California, United States of America
- Graduate Program in Neuroscience, University of California, Riverside, California, United States of America
- Department of Entomology, University of California, Riverside, California, United States of America
- * E-mail: (MRM); (MEA)
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8
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Hejníková M, Nouzova M, Ramirez CE, Fernandez-Lima F, Noriega FG, Doležel D. Sexual dimorphism of diapause regulation in the hemipteran bug Pyrrhocoris apterus. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2022; 142:103721. [PMID: 35007710 DOI: 10.1016/j.ibmb.2022.103721] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 12/29/2021] [Accepted: 01/06/2022] [Indexed: 06/14/2023]
Abstract
Diapause is one of the major strategies for insects to prepare for and survive harsh seasons. In females, the absence of juvenile hormone (JH) is a hallmark of adult reproductive diapause, a developmental arrest, which is much less characterized in males. Here we show that juvenile hormone III skipped bisepoxide (JHSB3) titers in hemolymph remarkably differ between reproductive males and females of the linden bug Pyrrhocoris apterus, whereas no JH was detected in diapausing adults of both sexes. Like in females, ectopic application of JH mimic effectively terminated male diapause through the canonical JH receptor components, Methoprene-tolerant and Taiman. In contrast to females, long photoperiod induced reproduction even in males with silenced JH reception or in males with removed corpus allatum (CA), the JH-producing gland. JHSB3 was detected in the accessory glands (MAG) of reproductive males, unexpectedly, even in males without CA. If there is a source of JHSB3 outside CA or a long-term storage of JHSB3 in MAGs remains to be elucidated. These sex-related idiosyncrasies are further manifested in different dynamics of diapause termination in P. apterus by low temperature. We would like to propose that this sexual dimorphism of diapause regulation might be explained by the different reproductive costs for each sex.
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Affiliation(s)
- Markéta Hejníková
- Biology Center of the Academy of Sciences of the Czech Republic, Institute of Entomology, 37005, Ceske Budejovice, Czech Republic; Faculty of Science, University of South Bohemia in Ceske Budejovice, 37005, Ceske Budejovice, Czech Republic
| | - Marcela Nouzova
- Biology Center of the Academy of Sciences of the Czech Republic, Institute of Parasitology, 37005, Ceske Budejovice, Czech Republic; Department of Biological Sciences, Biomolecular Science Institute, Florida International University, Miami, FL, 33199, USA
| | - Cesar E Ramirez
- Department of Chemistry and Biochemistry, Biomolecular Science Institute, Florida International University, Miami, FL, 33199, USA
| | - Francisco Fernandez-Lima
- Department of Chemistry and Biochemistry, Biomolecular Science Institute, Florida International University, Miami, FL, 33199, USA
| | - Fernando Gabriel Noriega
- Department of Biological Sciences, Biomolecular Science Institute, Florida International University, Miami, FL, 33199, USA
| | - David Doležel
- Biology Center of the Academy of Sciences of the Czech Republic, Institute of Entomology, 37005, Ceske Budejovice, Czech Republic; Faculty of Science, University of South Bohemia in Ceske Budejovice, 37005, Ceske Budejovice, Czech Republic.
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9
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Zhang X, Li S, Liu S. Juvenile Hormone Studies in Drosophila melanogaster. Front Physiol 2022; 12:785320. [PMID: 35222061 PMCID: PMC8867211 DOI: 10.3389/fphys.2021.785320] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 10/29/2021] [Indexed: 12/02/2022] Open
Abstract
In the field of insect endocrinology, juvenile hormone (JH) is one of the most wondrous entomological terms. As a unique sesquiterpenoid hormone produced and released by the endocrine gland, corpus allatum (CA), JH is a critical regulator in multiple developmental and physiological processes, such as metamorphosis, reproduction, and behavior. Benefited from the precise genetic interventions and simplicity, the fruit fly, Drosophila melanogaster, is an indispensable model in JH studies. This review is aimed to present the regulatory factors on JH biosynthesis and an overview of the regulatory roles of JH in Drosophila. The future directions of JH studies are also discussed, and a few hot spots are highlighted.
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Affiliation(s)
- Xiaoshuai Zhang
- Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology, Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology, Guangmeiyuan R&D Center, South China Normal University, Meizhou, China
| | - Sheng Li
- Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology, Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology, Guangmeiyuan R&D Center, South China Normal University, Meizhou, China
| | - Suning Liu
- Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology, Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology, Guangmeiyuan R&D Center, South China Normal University, Meizhou, China
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10
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Pandey A, Bloch G. Krüppel-homologue 1 Mediates Hormonally Regulated Dominance Rank in a Social Bee. BIOLOGY 2021; 10:biology10111188. [PMID: 34827180 PMCID: PMC8614866 DOI: 10.3390/biology10111188] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 11/09/2021] [Accepted: 11/10/2021] [Indexed: 12/23/2022]
Abstract
Dominance hierarchies are ubiquitous in invertebrates and vertebrates, but little is known on how genes influence dominance rank. Our gaps in knowledge are specifically significant concerning female hierarchies, particularly in insects. To start filling these gaps, we studied the social bumble bee Bombus terrestris, in which social hierarchies among females are common and functionally significant. Dominance rank in this bee is influenced by multiple factors, including juvenile hormone (JH) that is a major gonadotropin in this species. We tested the hypothesis that the JH responsive transcription factor Krüppel homologue 1 (Kr-h1) mediates hormonal influences on dominance behavior. We first developed and validated a perfluorocarbon nanoparticles-based RNA interference protocol for knocking down Kr-h1 expression. We then used this procedure to show that Kr-h1 mediates the influence of JH, not only on oogenesis and wax production, but also on aggression and dominance rank. To the best of our knowledge, this is the first study causally linking a gene to dominance rank in social insects, and one of only a few such studies on insects or on female hierarchies. These findings are important for determining whether there are general molecular principles governing dominance rank across gender and taxa.
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Affiliation(s)
- Atul Pandey
- Department of Ecology, Evolution and Behavior, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
- Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI 48109, USA
- Correspondence: (A.P.); (G.B.)
| | - Guy Bloch
- Department of Ecology, Evolution and Behavior, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
- Correspondence: (A.P.); (G.B.)
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11
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Kurogi Y, Mizuno Y, Imura E, Niwa R. Neuroendocrine Regulation of Reproductive Dormancy in the Fruit Fly Drosophila melanogaster: A Review of Juvenile Hormone-Dependent Regulation. Front Ecol Evol 2021. [DOI: 10.3389/fevo.2021.715029] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Animals can adjust their physiology, helping them survive and reproduce under a wide range of environmental conditions. One of the strategies to endure unfavorable environmental conditions such as low temperature and limited food supplies is dormancy. In some insect species, this may manifest as reproductive dormancy, which causes their reproductive organs to be severely depleted under conditions unsuitable for reproduction. Reproductive dormancy in insects is induced by a reduction in juvenile hormones synthesized in the corpus allatum (pl. corpora allata; CA) in response to winter-specific environmental cues, such as low temperatures and short-day length. In recent years, significant progress has been made in the study of dormancy-inducing conditions dependent on CA control mechanisms in Drosophila melanogaster. This review summarizes dormancy control mechanisms in D. melanogaster and discusses the implications for future studies of insect dormancy, particularly focusing on juvenile hormone-dependent regulation.
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12
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Mizuno Y, Imura E, Kurogi Y, Shimada-Niwa Y, Kondo S, Tanimoto H, Hückesfeld S, Pankratz MJ, Niwa R. A population of neurons that produce hugin and express the diuretic hormone 44 receptor gene projects to the corpora allata in Drosophila melanogaster. Dev Growth Differ 2021; 63:249-261. [PMID: 34021588 DOI: 10.1111/dgd.12733] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 05/14/2021] [Accepted: 05/17/2021] [Indexed: 12/25/2022]
Abstract
The corpora allata (CA) are essential endocrine organs that biosynthesize and secrete the sesquiterpenoid hormone, namely juvenile hormone (JH), to regulate a wide variety of developmental and physiological events in insects. CA are directly innervated with neurons in many insect species, implying the innervations to be important for regulating JH biosynthesis. Although this is also true for the model organism Drosophila melanogaster, neurotransmitters produced in the CA-projecting neurons are yet to be identified. In this study on D. melanogaster, we aimed to demonstrate that a subset of neurons producing the neuropeptide hugin, the invertebrate counterpart of the vertebrate neuromedin U, directly projects to the adult CA. A synaptic vesicle marker in the hugin neurons was observed at their axon termini located on the CA, which were immunolabeled with a newly-generated antibody to the JH biosynthesis enzyme JH acid O-methyltransferase. We also found the CA-projecting hugin neurons to likely express a gene encoding the specific receptor for diuretic hormone 44 (Dh44). Moreover, our data suggest that the CA-projecting hugin neurons have synaptic connections with the upstream neurons producing Dh44. Unexpectedly, the inhibition of CA-projecting hugin neurons did not significantly alter the expression levels of the JH-inducible gene Krüppel-homolog 1, which implies that the CA-projecting neurons are not involved in JH biosynthesis but rather in other known biological processes. This is the first study to identify a specific neurotransmitter of the CA-projecting neurons in D. melanogaster, and to anatomically characterize a neuronal pathway of the CA-projecting neurons and their upstream neurons.
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Affiliation(s)
- Yosuke Mizuno
- Degree Programs in Life and Earth Sciences, Graduate School of Science and Technology, University of Tsukuba, Tsukuba, Japan
| | - Eisuke Imura
- Degree Programs in Life and Earth Sciences, Graduate School of Science and Technology, University of Tsukuba, Tsukuba, Japan
| | - Yoshitomo Kurogi
- Degree Programs in Life and Earth Sciences, Graduate School of Science and Technology, University of Tsukuba, Tsukuba, Japan
| | - Yuko Shimada-Niwa
- Life Science Center for Survival Dynamics, Tsukuba Advanced Research Alliance (TARA), University of Tsukuba, Tsukuba, Japan
| | - Shu Kondo
- Invertebrate Genetics Laboratory, National Institute of Genetics, Mishima, Japan
| | - Hiromu Tanimoto
- Graduate School of Life Sciences, Tohoku University, Sendai, Japan
| | | | | | - Ryusuke Niwa
- Life Science Center for Survival Dynamics, Tsukuba Advanced Research Alliance (TARA), University of Tsukuba, Tsukuba, Japan
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13
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Lee SS, Adams ME. Regulation of Drosophila Long-Term Courtship Memory by Ecdysis Triggering Hormone. Front Neurosci 2021; 15:670322. [PMID: 33967686 PMCID: PMC8100193 DOI: 10.3389/fnins.2021.670322] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Accepted: 03/30/2021] [Indexed: 11/17/2022] Open
Abstract
Endocrine state is an important determinant of learning and memory in animals. In Drosophila, rejection of male courtship overtures by mated females leads to an aversive response manifested as courtship memory. Here we report that ecdysis triggering hormone (ETH) is an obligatory enabler of long-term courtship memory (LTM). ETH deficiency suppresses LTM, whereas augmented ETH release reduces the minimum training period required for LTM induction. ETH receptor knockdown either in the mushroom body (MB) γ lobe or in octopaminergic dorsal-anterior-lateral (DAL) neurons impairs memory performance, indicating its direct action in these brain areas. Consistent with these findings, brain exposure to ETH mobilizes calcium in MB γ lobe neuropils and DAL neurons. ETH receptor (ETHR) knockdown in the corpus allatum (CA) to create juvenile hormone (JH) deficiency also suppresses LTM, as does knockdown of the JH receptor Met in the MB γ lobe, indicating a convergence of ETH and JH signaling in this region of the brain. Our findings identify endocrine-enabled neural circuit components in the brain that are critical for persistent behavioral changes resulting from aversive social experience.
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Affiliation(s)
- Sang Soo Lee
- Neuroscience Graduate Program, University of California, Riverside, Riverside, CA, United States.,Department of Molecular, Cell, and Systems Biology, University of California, Riverside, Riverside, CA, United States
| | - Michael E Adams
- Neuroscience Graduate Program, University of California, Riverside, Riverside, CA, United States.,Department of Molecular, Cell, and Systems Biology, University of California, Riverside, Riverside, CA, United States.,Department of Entomology, University of California, Riverside, Riverside, CA, United States
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14
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Abstract
Drosophila melanogaster males reduce courtship behaviour after mating failure. In the lab, such conditioned courtship suppression, aka 'courtship conditioning', serves as a complex learning and memory assay. Interestingly, variations in the courtship conditioning assay can establish different types of memory. Here, we review research investigating the underlying cellular and molecular mechanisms that allow male flies to form memories of previous mating failures.
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Affiliation(s)
- Nicholas Raun
- Department of Biochemistry and Molecular Biology, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Spencer Jones
- Department of Biochemistry and Molecular Biology, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Jamie M Kramer
- Department of Biochemistry and Molecular Biology, Dalhousie University, Halifax, Nova Scotia, Canada
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15
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Approaches and Tools to Study the Roles of Juvenile Hormones in Controlling Insect Biology. INSECTS 2020; 11:insects11120858. [PMID: 33287115 PMCID: PMC7761706 DOI: 10.3390/insects11120858] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 12/01/2020] [Accepted: 12/02/2020] [Indexed: 12/03/2022]
Abstract
Simple Summary The juvenile hormones (JHs) play critical roles during insect development and reproduction. The numerous effects of JHs have generated multiple basic scientific questions, as well as prospects for the development of insecticidal endocrine disruptors. There is an increasing need for methods to identify and quantify endogenous JHs. The low titers and difficulties in working with these lipophilic compounds have often hindered the study of JH biology. In this article, we review the existing information on the detection and quantification of JH from insect samples, the development of approaches to manipulate JH titers, and the use of next-generation tools to modulate JH homeostasis. Abstract The juvenile hormones (JHs) are a group of sesquiterpenoids synthesized by the corpora allata. They play critical roles during insect development and reproduction. To study processes that are controlled by JH, researchers need methods to identify and quantify endogenous JHs and tools that can be used to increase or decrease JH titers in vitro and in vivo. The lipophilic nature of JHs, coupled with the low endogenous titers, make handling and quantification challenging. JH titers in insects can easily be increased by the topical application of JH analogs, such as methoprene. On the other hand, experimentally reducing JH titers has been more difficult. New approaches to modulate JH homeostasis have been established based on advances in RNA interference and CRISPR/Cas9-based genome editing. This review will summarize current advances in: (1) the detection and quantification of JHs from insect samples; (2) approaches to manipulating JH titers; and (3) next-generation tools to modulate JH homeostasis.
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16
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Dombrovski M, Condron B. Critical periods shaping the social brain: A perspective from Drosophila. Bioessays 2020; 43:e2000246. [PMID: 33215730 DOI: 10.1002/bies.202000246] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 09/28/2020] [Accepted: 09/29/2020] [Indexed: 11/08/2022]
Abstract
Many sensory processing regions of the central brain undergo critical periods of experience-dependent plasticity. During this time ethologically relevant information shapes circuit structure and function. The mechanisms that control critical period timing and duration are poorly understood, and this is of special importance for those later periods of development, which often give rise to complex cognitive functions such as social behavior. Here, we review recent findings in Drosophila, an organism that has some unique experimental advantages, and introduce novel views for manipulating plasticity in the post-embryonic brain. Critical periods in larval and young adult flies resemble classic vertebrate models with distinct onset and termination, display clear connections with complex behaviors, and provide opportunities to control the time course of plasticity. These findings may extend our knowledge about mechanisms underlying extension and reopening of critical periods, a concept that has great relevance to many human neurodevelopmental disorders.
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Affiliation(s)
- Mark Dombrovski
- Department of Biology, University of Virginia, Charlottesville, Virginia, USA
| | - Barry Condron
- Department of Biology, University of Virginia, Charlottesville, Virginia, USA
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17
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Oliphant A, Hawkes MKN, Cridge AG, Dearden PK. Transcriptomic characterisation of neuropeptides and their putative cognate G protein-coupled receptors during late embryo and stage-1 juvenile development of the Aotearoa-New Zealand crayfish, Paranephrops zealandicus. Gen Comp Endocrinol 2020; 292:113443. [PMID: 32097662 DOI: 10.1016/j.ygcen.2020.113443] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 02/19/2020] [Accepted: 02/20/2020] [Indexed: 12/18/2022]
Abstract
We de novo assembled a transcriptome for early life-stages of the Aotearoa-New Zealand crayfish, Paranephrops zealandicus, establishing the first genetic resource for this under-developed aquaculture species and for the Paranephrops genus. Mining of this transcriptome for neuropeptides and their putative cognate G protein-coupled receptors (GPCRs) yielded a comprehensive catalogue of neuropeptides, but few putative neuropeptide GPCRs. Of the neuropeptides commonly identified from decapod transcriptomes, only crustacean female sex hormone and insulin-like peptide were absent from our trinity de novo transcriptome assembly, and also RNA-sequence reads. We identified 63 putative neuropeptide precursors from 43 families, predicted to yield 122 active peptides. Transcripts encoding 26 putative neuropeptide GPCRs were identified but were often incomplete. Putative GPCRs for 15 of the neuropeptides identified here were absent from our transcriptome and RNAseq reads. These data highlight the diverse neuropeptide systems already present at the early development life stages sampled here for P. zealandicus.
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Affiliation(s)
- Andrew Oliphant
- Genomics Aotearoa and Department of Biochemistry, University of Otago, Dunedin 9054, New Zealand.
| | - Mary K N Hawkes
- Genomics Aotearoa and Department of Biochemistry, University of Otago, Dunedin 9054, New Zealand
| | - Andrew G Cridge
- Genomics Aotearoa and Department of Biochemistry, University of Otago, Dunedin 9054, New Zealand
| | - Peter K Dearden
- Genomics Aotearoa and Department of Biochemistry, University of Otago, Dunedin 9054, New Zealand
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18
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Zhao S, Deanhardt B, Barlow GT, Schleske PG, Rossi AM, Volkan PC. Chromatin-based reprogramming of a courtship regulator by concurrent pheromone perception and hormone signaling. SCIENCE ADVANCES 2020; 6:eaba6913. [PMID: 32494751 PMCID: PMC7244261 DOI: 10.1126/sciadv.aba6913] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 03/18/2020] [Indexed: 06/11/2023]
Abstract
To increase fitness, animals use both internal and external states to coordinate reproductive behaviors. The molecular mechanisms underlying this coordination remain unknown. Here, we focused on pheromone-sensing Drosophila Or47b neurons, which exhibit age- and social experience-dependent increase in pheromone responses and courtship advantage in males. FruitlessM (FruM), a master regulator of male courtship behaviors, drives the effects of social experience and age on Or47b neuron responses and function. We show that simultaneous exposure to social experience and age-specific juvenile hormone (JH) induces chromatin-based reprogramming of fruM expression in Or47b neurons. Group housing and JH signaling increase fruM expression in Or47b neurons and active chromatin marks at fruM promoter. Conversely, social isolation or loss of JH signaling decreases fruM expression and increases repressive marks around fruM promoter. Our results suggest that fruM promoter integrates coincident hormone and pheromone signals driving chromatin-based changes in expression and ultimately neuronal and behavioral plasticity.
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Affiliation(s)
- Songhui Zhao
- Department of Biology, Duke University, Durham, NC 27708, USA
| | - Bryson Deanhardt
- Department of Neurobiology, Duke University, Durham, NC 27708, USA
| | | | | | - Anthony M. Rossi
- Department of Biology, New York University, New York, NY 10003, USA
| | - Pelin C. Volkan
- Department of Biology, Duke University, Durham, NC 27708, USA
- Department of Neurobiology, Duke University, Durham, NC 27708, USA
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19
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Costa CP, Duennes MA, Fisher K, Der JP, Watrous KM, Okamoto N, Yamanaka N, Woodard SH. Transcriptome analysis reveals nutrition‐ and age‐related patterns of gene expression in the fat body of pre‐overwintering bumble bee queens. Mol Ecol 2020; 29:720-737. [DOI: 10.1111/mec.15361] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 01/06/2020] [Accepted: 01/08/2020] [Indexed: 01/01/2023]
Affiliation(s)
| | | | - Kaleigh Fisher
- Department of Entomology University of California Riverside CA USA
| | - Joshua P. Der
- Department of Biological Science California State University Fullerton CA USA
| | | | - Naoki Okamoto
- Department of Entomology University of California Riverside CA USA
| | - Naoki Yamanaka
- Department of Entomology University of California Riverside CA USA
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20
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Environmental Light Is Required for Maintenance of Long-Term Memory in Drosophila. J Neurosci 2020; 40:1427-1439. [PMID: 31932417 DOI: 10.1523/jneurosci.1282-19.2019] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 11/14/2019] [Accepted: 12/12/2019] [Indexed: 12/19/2022] Open
Abstract
Long-term memory (LTM) is stored as functional modifications of relevant neural circuits in the brain. A large body of evidence indicates that the initial establishment of such modifications through the process known as memory consolidation requires learning-dependent transcriptional activation and de novo protein synthesis. However, it remains poorly understood how the consolidated memory is maintained for a long period in the brain, despite constant turnover of molecular substrates. Using the Drosophila courtship conditioning assay of adult males as a memory paradigm, here, we show that in Drosophila, environmental light plays a critical role in LTM maintenance. LTM is impaired when flies are kept in constant darkness (DD) during the memory maintenance phase. Because light activates the brain neurons expressing the neuropeptide pigment-dispersing factor (Pdf), we examined the possible involvement of Pdf neurons in LTM maintenance. Temporal activation of Pdf neurons compensated for the DD-dependent LTM impairment, whereas temporal knockdown of Pdf during the memory maintenance phase impaired LTM in light/dark cycles. Furthermore, we demonstrated that the transcription factor cAMP response element-binding protein (CREB) is required in the memory center, namely, the mushroom bodies (MBs), for LTM maintenance, and Pdf signaling regulates light-dependent transcription via CREB. Our results demonstrate for the first time that universally available environmental light plays a critical role in LTM maintenance by activating the evolutionarily conserved memory modulator CREB in MBs via the Pdf signaling pathway.SIGNIFICANCE STATEMENT Temporary memory can be consolidated into long-term memory (LTM) through de novo protein synthesis and functional modifications of neuronal circuits in the brain. Once established, LTM requires continual maintenance so that it is kept for an extended period against molecular turnover and cellular reorganization that may disrupt memory traces. How is LTM maintained mechanistically? Despite the critical importance of LTM maintenance, its molecular and cellular underpinnings remain elusive. This study using Drosophila is significant because it revealed for the first time in any organism that universally available environmental light plays an essential role in LTM maintenance. Interestingly, light does so by activating the evolutionarily conserved transcription factor cAMP response element-binding protein via peptidergic signaling.
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21
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Bao C, Liu F, Yang Y, Lin Q, Ye H. Identification of Peptides and Their GPCRs in the Peppermint Shrimp Lysmata vittata, a Protandric Simultaneous Hermaphrodite Species. Front Endocrinol (Lausanne) 2020; 11:226. [PMID: 32425883 PMCID: PMC7212414 DOI: 10.3389/fendo.2020.00226] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 03/30/2020] [Indexed: 12/17/2022] Open
Abstract
Peptide hormones commonly binding with G-protein coupled receptors (GPCRs) achieve their function in reproduction. The peppermint shrimp Lysmata vittata popular in marine ornamental trade and is known to display protandric simultaneous hermaphrodite (PSH). Knowledge on reproductive biology of this commercial species is critical for resources management and aquaculture. This study employed Illumina sequencing and bioinformatics analysis to identify peptides and their candidate GPCRs from male phase (MP) and euhermaphrodite phase (EP) of L. vittata. A total of 61 peptide and 40 peptide GPCR transcripts derive from 44 peptide families and 13 peptide GPCR families were identified, respectively. Among them, insulin-like androgenic gland hormone and crustacean female sex hormone have two unique mature peptides, respectively, and their transcripts showed higher expression levels in MP than EP, which suggest that these sex differentiation hormones might be involved in sexual characters than spermatogenesis or vitellogenesis. Overall, the first study on identification of peptides and their GPCRs in the genus Lysmata extends our knowledge of peptidergic signaling in PSH species, and provides an important basis for development of aquaculture strategies.
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Affiliation(s)
- Chenchang Bao
- School of Marine Science, Ningbo University, Ningbo, China
| | - Fang Liu
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, China
| | - Yanan Yang
- School of Marine Science, Ningbo University, Ningbo, China
| | - Qi Lin
- Fisheries Research Institute of Fujian, Xiamen, China
| | - Haihui Ye
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, China
- *Correspondence: Haihui Ye
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22
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Sethi S, Lin HH, Shepherd AK, Volkan PC, Su CY, Wang JW. Social Context Enhances Hormonal Modulation of Pheromone Detection in Drosophila. Curr Biol 2019; 29:3887-3898.e4. [PMID: 31679932 DOI: 10.1016/j.cub.2019.09.045] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 09/06/2019] [Accepted: 09/16/2019] [Indexed: 12/16/2022]
Abstract
Critical to evolutionary fitness, animals regulate social behaviors by integrating signals from both their external environments and internal states. Here, we find that population density modulates the courtship behavior of male Drosophila melanogaster in an age-dependent manner. In a competitive mating assay, males reared in a social environment have a marked advantage in courting females when pitted against males reared in isolation. Group housing promotes courtship in mature (7-day) but not immature (2-day) males; this behavioral plasticity requires the Or47b pheromone receptor. Using single-sensillum recordings, we find that group housing increases the response of Or47b olfactory receptor neurons (ORNs) only in mature males. The effect of group housing on olfactory response and behavior can be mimicked by chronically exposing single-housed males to an Or47b ligand. At the molecular level, group housing elevates Ca2+ levels in Or47b ORNs, likely leading to CaMKI-mediated activation of the histone-acetyl transferase CBP. This signaling event in turn enhances the efficacy of juvenile hormone, an age-related regulator of reproductive maturation in flies. Furthermore, the male-specific Fruitless isoform (FruM) is required for the sensory plasticity, suggesting that FruM functions as a downstream genomic coincidence detector in Or47b ORNs-integrating reproductive maturity, signaled by juvenile hormone, and population density, signaled by CBP. In all, we identify a neural substrate and activity-dependent mechanism by which social context can directly influence pheromone sensitivity, thereby modulating social behavior according to animals' life-history stage.
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Affiliation(s)
- Sachin Sethi
- Neurobiology Section, Division of Biological Sciences, University of California, San Diego, La Jolla, CA 92093, USA
| | - Hui-Hao Lin
- Neurobiology Section, Division of Biological Sciences, University of California, San Diego, La Jolla, CA 92093, USA
| | - Andrew K Shepherd
- Neurobiology Section, Division of Biological Sciences, University of California, San Diego, La Jolla, CA 92093, USA
| | - Pelin C Volkan
- Department of Biology, Duke University, Durham, NC 27708, USA; Department of Neurobiology, Duke University, Durham, NC 27708, USA
| | - Chih-Ying Su
- Neurobiology Section, Division of Biological Sciences, University of California, San Diego, La Jolla, CA 92093, USA
| | - Jing W Wang
- Neurobiology Section, Division of Biological Sciences, University of California, San Diego, La Jolla, CA 92093, USA.
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23
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Brenman-Suttner DB, Yost RT, Frame AK, Robinson JW, Moehring AJ, Simon AF. Social behavior and aging: A fly model. GENES BRAIN AND BEHAVIOR 2019; 19:e12598. [PMID: 31286644 DOI: 10.1111/gbb.12598] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 07/02/2019] [Accepted: 07/05/2019] [Indexed: 12/16/2022]
Abstract
The field of behavioral genetics has recently begun to explore the effect of age on social behaviors. Such studies are particularly important, as certain neuropsychiatric disorders with abnormal social interactions, like autism and schizophrenia, have been linked to older parents. Appropriate social interaction can also have a positive impact on longevity, and is associated with successful aging in humans. Currently, there are few genetic models for understanding the effect of aging on social behavior and its potential transgenerational inheritance. The fly is emerging as a powerful model for identifying the basic molecular mechanisms underlying neurological and neuropsychiatric disorders. In this review, we discuss these recent advancements, with a focus on how studies in Drosophila melanogaster have provided insight into the effect of aging on aspects of social behavior, including across generations.
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Affiliation(s)
- Dova B Brenman-Suttner
- Department of Biology, Faculty of Science, Western University, London, Ontario, Canada.,Department of Biology, York University, Toronto, Ontario, Canada
| | - Ryley T Yost
- Department of Biology, Faculty of Science, Western University, London, Ontario, Canada
| | - Ariel K Frame
- Department of Biology, Faculty of Science, Western University, London, Ontario, Canada
| | - J Wesley Robinson
- Department of Biology, Faculty of Science, Western University, London, Ontario, Canada
| | - Amanda J Moehring
- Department of Biology, Faculty of Science, Western University, London, Ontario, Canada
| | - Anne F Simon
- Department of Biology, Faculty of Science, Western University, London, Ontario, Canada
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24
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Deshpande SA, Meiselman M, Hice RH, Arensburger P, Rivera-Perez C, Kim DH, Croft RL, Noriega FG, Adams ME. Ecdysis triggering hormone receptors regulate male courtship behavior via antennal lobe interneurons in Drosophila. Gen Comp Endocrinol 2019; 278:79-88. [PMID: 30543770 DOI: 10.1016/j.ygcen.2018.12.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 12/05/2018] [Accepted: 12/10/2018] [Indexed: 10/27/2022]
Abstract
Ecdysis triggering hormone receptors (ETHR) regulate the behavioral sequence necessary for cuticle shedding. Recent reports have documented functions for ETHR signaling in adult Drosophila melanogaster. In this study, we report that ETHR silencing in local interneurons of the antennal lobes and fruitless neurons leads to sharply increased rates of male-male courtship. RNAseq analysis of ETHR knockdown flies reveals differential expression of genes involved in axon guidance, courtship behavior and chemosensory functions. Our findings indicate an important role for ETHR in regulation of Drosophila courtship behavior through chemosensory processing in the antennal lobe.
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Affiliation(s)
- Sonali A Deshpande
- Department of Entomology, University of California, Riverside, CA 92521, United States
| | - Matthew Meiselman
- Graduate Program in Cell, Molecular, and Developmental Biology, University of California, Riverside, CA 92521, United States
| | - Robert H Hice
- Department of Entomology, University of California, Riverside, CA 92521, United States
| | - Peter Arensburger
- Department of Biological Sciences, California State Polytechnic University, Pomona, CA 917684, United States
| | - Crisalejandra Rivera-Perez
- Department of Biological Sciences, Biomolecular Sciences Institute, Florida International University, Miami, FL 33199, United States
| | - Do-Hyoung Kim
- Department of Entomology, University of California, Riverside, CA 92521, United States
| | - Rachel L Croft
- Cell Biology and Neuroscience, University of California, Riverside, CA 92521, United States
| | - Fernando Gabriel Noriega
- Department of Biological Sciences, Biomolecular Sciences Institute, Florida International University, Miami, FL 33199, United States
| | - Michael E Adams
- Department of Entomology, University of California, Riverside, CA 92521, United States; Cell Biology and Neuroscience, University of California, Riverside, CA 92521, United States.
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25
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Nässel DR, Zandawala M. Recent advances in neuropeptide signaling in Drosophila, from genes to physiology and behavior. Prog Neurobiol 2019; 179:101607. [PMID: 30905728 DOI: 10.1016/j.pneurobio.2019.02.003] [Citation(s) in RCA: 175] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 02/18/2019] [Accepted: 02/28/2019] [Indexed: 12/11/2022]
Abstract
This review focuses on neuropeptides and peptide hormones, the largest and most diverse class of neuroactive substances, known in Drosophila and other animals to play roles in almost all aspects of daily life, as w;1;ell as in developmental processes. We provide an update on novel neuropeptides and receptors identified in the last decade, and highlight progress in analysis of neuropeptide signaling in Drosophila. Especially exciting is the huge amount of work published on novel functions of neuropeptides and peptide hormones in Drosophila, largely due to the rapid developments of powerful genetic methods, imaging techniques and innovative assays. We critically discuss the roles of peptides in olfaction, taste, foraging, feeding, clock function/sleep, aggression, mating/reproduction, learning and other behaviors, as well as in regulation of development, growth, metabolic and water homeostasis, stress responses, fecundity, and lifespan. We furthermore provide novel information on neuropeptide distribution and organization of peptidergic systems, as well as the phylogenetic relations between Drosophila neuropeptides and those of other phyla, including mammals. As will be shown, neuropeptide signaling is phylogenetically ancient, and not only are the structures of the peptides, precursors and receptors conserved over evolution, but also many functions of neuropeptide signaling in physiology and behavior.
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Affiliation(s)
- Dick R Nässel
- Department of Zoology, Stockholm University, Stockholm, Sweden.
| | - Meet Zandawala
- Department of Zoology, Stockholm University, Stockholm, Sweden; Department of Neuroscience, Brown University, Providence, RI, USA.
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26
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Shi Y, Liu TY, Jiang HB, Liu XQ, Dou W, Park Y, Smagghe G, Wang JJ. The Ecdysis Triggering Hormone System, via ETH/ETHR-B, Is Essential for Successful Reproduction of a Major Pest Insect, Bactrocera dorsalis (Hendel). Front Physiol 2019; 10:151. [PMID: 30936833 PMCID: PMC6431669 DOI: 10.3389/fphys.2019.00151] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Accepted: 02/08/2019] [Indexed: 01/07/2023] Open
Abstract
Ecdysis triggering hormone (ETH), released by the Inka cells, is a master hormone in regulating the ecdysis process in insect. Here we investigated the presence and role of the ETH signaling in the female adult of the oriental fruit fly, Bactrocera dorsalis (Hendel) that is one of the most important invasive pest insects in agriculture worldwide. In the female adult, ETH was confirmed in the Inka cells at the tracheae by immunostaining and also in vitro exposure to ETH stimulated the isolated corpora allata of adult in activity. Then we prepared cDNA of females at 0, 5, 10, 15, and 20 days after adult eclosion, and RT-qPCR showed that the expression pattern of ETH and its receptor ETHR-B started from a peak at the day of adult eclosion (day 0), then dropped to basal levels and increased again between day 10 and 15 which is also the period corresponding to ovary growth. In contrast, ETHR-A was absent with Ct values of >33. The expression patterns of the ecdysteroid-producing Halloween genes Spook and Shade, and the vitellogenin genes Vg1, Vg2, and Vg3 co-occurred with peak levels at days 10–15, and also juvenile hormone acid methyltransferase (JHAMT) showed increased levels on day 15. Further in RNAi assays to better understand the role of ETH and ETHR, dsRNA was injected to adult and this led to a respective decrease in expression of 62 and 56% for ETH and ETHR-B, while ETHR-A stayed absent with Ct values of 33. In these RNAi-females, there was an apparently decreased expression for JHAMT and Vg2, together with a significant decrease of the JH titer and egg production. Injection of the JH mimetic methoprene could rescue Vg2 expression and egg production. Upstream, in dsETH/dsETHR-injected females, 20-hydroxyecdysone (20E) injection rescued the transcriptions of ETH and ETHR and also egg production. In summary, our results shed more light on the pivotal role that the ETH peptide hormone and its receptor ETHR-B play an essential role in the reproduction of the female adult of B. dorsalis, via the regulation of JH and vitellogenin, which are controlled by a pulse of 20E.
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Affiliation(s)
- Yan Shi
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China.,Academy of Agricultural Sciences, Southwest University, Chongqing, China
| | - Tian-Yuan Liu
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China.,Academy of Agricultural Sciences, Southwest University, Chongqing, China
| | - Hong-Bo Jiang
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China.,Academy of Agricultural Sciences, Southwest University, Chongqing, China.,International Joint Laboratory on China-Belgium Sustainable Crop Pest Control Between Southwest University in China and Ghent University in Belgium, Chongqing, China
| | - Xiao-Qiang Liu
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China.,Academy of Agricultural Sciences, Southwest University, Chongqing, China
| | - Wei Dou
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China.,Academy of Agricultural Sciences, Southwest University, Chongqing, China.,International Joint Laboratory on China-Belgium Sustainable Crop Pest Control Between Southwest University in China and Ghent University in Belgium, Chongqing, China
| | - Yoonseong Park
- Department of Entomology, Kansas State University, Manhattan, KS, United States
| | - Guy Smagghe
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China.,Academy of Agricultural Sciences, Southwest University, Chongqing, China.,International Joint Laboratory on China-Belgium Sustainable Crop Pest Control Between Southwest University in China and Ghent University in Belgium, Chongqing, China.,Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Jin-Jun Wang
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China.,Academy of Agricultural Sciences, Southwest University, Chongqing, China.,International Joint Laboratory on China-Belgium Sustainable Crop Pest Control Between Southwest University in China and Ghent University in Belgium, Chongqing, China
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