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McLamb F, Feng Z, Vu JP, Griffin L, Vasquez MF, Bozinovic G. Lagging Brain Gene Expression Patterns of Drosophila melanogaster Young Adult Males Confound Comparisons Between Sexes. Mol Neurobiol 2024:10.1007/s12035-024-04427-7. [PMID: 39196495 DOI: 10.1007/s12035-024-04427-7] [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: 03/28/2024] [Accepted: 08/07/2024] [Indexed: 08/29/2024]
Abstract
Many species, including fruit flies (Drosophila melanogaster), are sexually dimorphic. Phenotypic variation in morphology, physiology, and behavior can affect development, reproduction, health, and aging. Therefore, designating sex as a variable and sex-blocking should be considered when designing experiments. The brain regulates phenotypes throughout the lifespan by balancing survival and reproduction, and sex-specific development at each life stage is likely. Changes in morphology and physiology are governed by differential gene expression, a quantifiable molecular marker for age- and sex-specific variations. We assessed the fruit fly brain transcriptome at three adult ages for gene expression signatures of sex, age, and sex-by-age: 6698 genes were differentially expressed between sexes, with the most divergence at 3 days. Between ages, 31.1% of 6084 differentially expressed genes (1890 genes) share similar expression patterns from 3 to 7 days in females, and from 7 to 14 days in males. Most of these genes (90.5%, 1712) were upregulated and enriched for chemical stimulus detection and/or cilium regulation. Our data highlight an important delay in male brain gene regulation compared to females. Because significant delays in expression could confound comparisons between sexes, studies of sexual dimorphism at phenotypically comparable life stages rather than chronological age should be more biologically relevant.
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Affiliation(s)
- Flannery McLamb
- Boz Life Science Research and Teaching Institute, La Jolla, CA, USA
- Division of Extended Studies, University of California San Diego, La Jolla, CA, USA
| | - Zuying Feng
- Boz Life Science Research and Teaching Institute, La Jolla, CA, USA
| | - Jeanne P Vu
- Boz Life Science Research and Teaching Institute, La Jolla, CA, USA
- Graduate School of Public Health, San Diego State University, San Diego, CA, USA
| | - Lindsey Griffin
- Boz Life Science Research and Teaching Institute, La Jolla, CA, USA
- Division of Extended Studies, University of California San Diego, La Jolla, CA, USA
| | - Miguel F Vasquez
- Boz Life Science Research and Teaching Institute, La Jolla, CA, USA
- National Center for Microscopy and Imaging Research, University of California San Diego, La Jolla, CA, USA
| | - Goran Bozinovic
- Boz Life Science Research and Teaching Institute, La Jolla, CA, USA.
- Graduate School of Public Health, San Diego State University, San Diego, CA, USA.
- Center for Life in Extreme Environments, Portland State University, Portland, OR, USA.
- School of Biological Sciences, University of California San Diego, La Jolla, CA, USA.
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Hug DOH, Kropf A, Amann MO, Koella JC, Verhulst NO. Unexpected behavioural adaptation of yellow fever mosquitoes in response to high temperatures. Sci Rep 2024; 14:3659. [PMID: 38351076 PMCID: PMC10864274 DOI: 10.1038/s41598-024-54374-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 02/12/2024] [Indexed: 02/16/2024] Open
Abstract
Temperature is a major ecological driver of mosquito-borne diseases as it influences the life-history of both the mosquito and the pathogen harboured within it. Understanding the mosquitoes' thermal biology is essential to inform risk prediction models of such diseases. Mosquitoes can respond to temperatures by microhabitat selection through thermal preference. However, it has not yet been considered that mosquitoes are likely to adapt to changing temperatures, for example during climate change, and alter their preference over evolutionary time. We investigated this by rearing six cohorts of the yellow fever mosquito Aedes aegypti at two temperatures (24 °C, 30 °C) for 20 generations and used these cohorts to explicitly separate the effects of long-term evolution and within-generation acclimation on their thermal preferences in a thermal gradient of 20-35 °C. We found that warm-evolved mosquitoes spent 31.5% less time at high temperatures, which affects their efficiency as a vector. This study reveals the complex interplay of experimental evolution, rearing temperatures, and thermal preference in Ae. aegypti mosquitoes. It highlights the significance of incorporating mosquito microhabitat selection in disease transmission models, especially in the context of climate change.
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Affiliation(s)
- David O H Hug
- National Centre for Vector Entomology, Institute of Parasitology, Vetsuisse and Medical Faculty, University of Zürich, Zurich, Switzerland
| | - Alida Kropf
- Laboratory of Ecology and Epidemiology of Parasites, Institute of Biology, University of Neuchâtel, Neuchâtel, Switzerland
| | - Marine O Amann
- Laboratory of Ecology and Epidemiology of Parasites, Institute of Biology, University of Neuchâtel, Neuchâtel, Switzerland
| | - Jacob C Koella
- Laboratory of Ecology and Epidemiology of Parasites, Institute of Biology, University of Neuchâtel, Neuchâtel, Switzerland
| | - Niels O Verhulst
- National Centre for Vector Entomology, Institute of Parasitology, Vetsuisse and Medical Faculty, University of Zürich, Zurich, Switzerland.
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Su Y, Fan J, Wang X, Wang X, Li J, Duan B, Kang L, Wei L, Yao XS. Noninvasive examination of the cardiac properties of insect embryos enabled by optical coherence tomography. JOURNAL OF BIOPHOTONICS 2022; 15:e202100308. [PMID: 35234351 DOI: 10.1002/jbio.202100308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 01/14/2022] [Accepted: 02/15/2022] [Indexed: 06/14/2023]
Abstract
Understanding the cardiac properties of insect embryos at different development stages is important, however, few works have been conducted probably due to the lack of effective tools. Using locust embryos as an example, here we show, for the first time, that optical coherence tomography (OCT) is capable of obtaining detailed information of embryos' heart activities and irregularities, such as the heart rate, cardiac cycle, diastolic and systolic diameters, hemolymph pumping rate and ejection fraction at different stages of embryonic development and at different temperatures. We develop algorithms and mathematical methods for extracting and analyzing cardiac behavior information of locust embryos. We discover that locust embryos experienced suspended development (quiescence) caused by cold storage have a heart rate 20% more than that of embryos without experiencing quiescence and that the hemolymph pumping rate of the two types of embryos behaves differently as the embryos grow. In addition, using OCT as an accurate cardiac activity examination tool, we show that the heart rates of locust embryos are effectively reduced due to nitric oxide synthase gene silencing by RNA interference, indicating potential application of using locust embryos as a good model organism to study cardiovascular diseases, including the congenital heart disease and arrhythmia. Finally, the capabilities offered by OCT in the studies of locust embryonic development may also prove helpful to promote locust reproduction for nutritions or restrain locust reproduction for pest control.
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Affiliation(s)
- Ya Su
- Photonics Information Innovation Center and Hebei Provincial Center for Optical Sensing Innovations, College of Physics Science & Technology, Hebei University, Baoding, China
| | - Jiangling Fan
- College of Life Sciences, Hebei University, Baoding, China
| | - Xiuli Wang
- Photonics Information Innovation Center and Hebei Provincial Center for Optical Sensing Innovations, College of Physics Science & Technology, Hebei University, Baoding, China
| | - Xiaoxiao Wang
- College of Life Sciences, Hebei University, Baoding, China
| | - Jing Li
- College of Life Sciences, Hebei University, Baoding, China
| | - Bingbing Duan
- Photonics Information Innovation Center and Hebei Provincial Center for Optical Sensing Innovations, College of Physics Science & Technology, Hebei University, Baoding, China
| | - Le Kang
- College of Life Sciences, Hebei University, Baoding, China
| | - Liya Wei
- College of Life Sciences, Hebei University, Baoding, China
- Institute of Life Science and Green Development, Hebei University, Baoding, China
| | - X Steve Yao
- Photonics Information Innovation Center and Hebei Provincial Center for Optical Sensing Innovations, College of Physics Science & Technology, Hebei University, Baoding, China
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Kodirov SA. Probability that there is a mammalian counterpart of cardiac clock in insects. ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 2022; 110:e21867. [PMID: 35106839 PMCID: PMC9250754 DOI: 10.1002/arch.21867] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 12/25/2021] [Indexed: 05/05/2023]
Abstract
Whether or not the hyperpolarization-activated cyclic nucleotide-gated nonselective cation channel (HCN or funny current If ) is involved in pacemaking - recurrent heartbeat, it is attributed to electrical activities in all excitable cells, including those of invertebrates. In latter group of animals prevailingly the electrical signals and function of heart in terms of chrono- and inotropy are elucidated. Although in simpler models including insects experimental outcomes are reproducible and robust, involvement of "cardiac clock" mechanism in pacemaking is not conclusive. In this assay, the mechanisms of heartbeat are synthesized by focused comparisons between insect and mammalian hearts.
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Affiliation(s)
- Sodikdjon A. Kodirov
- Pavlov Institute of Physiology, Russian Academy of Sciences, Saint Petersburg, Russia
- Department of Biological Sciences, University of Texas at Brownsville, Brownsville, Texas, USA
- Instituto de Medicina Molecular, Universidade de Lisboa, Lisbon, Portugal
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Crayfish (Procambarus clarkii) TRPA1 is required for the defense against Aeromonas hydrophila infection under high temperature conditions and contributes to heat sensing. Comp Biochem Physiol B Biochem Mol Biol 2021; 257:110654. [PMID: 34371155 DOI: 10.1016/j.cbpb.2021.110654] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 07/18/2021] [Accepted: 08/03/2021] [Indexed: 11/20/2022]
Abstract
Temperature is an important environmental factor influencing immune responses of crayfish. However, the mechanism underlying how temperature affects immune responses remains unclear. Here, we identified an ortholog of the transient receptor potential ankyrin subtype 1 (TRPA1), a temperature sensor of Drosophila, from Procambarus clarkii (PcTRPA1-1). Its expression was induced by high temperature and challenge with heat-killed A. hydrophila at high temperature, but not at lower temperature. PcTRPA1-1 silencing led to increased mortality of crayfish challenged with live A. hydrophila at high temperature (32 °C), but had no statistically significant effect on crayfish mortality at 24 °C. This suggests that PcTRPA1-1 is involved in the immune responses of crayfish at high temperature as a potential temperature sensor. Further assay exhibited that PcTRPA1-1 silencing affected immune responses of crayfish, including increase of lipid peroxidation, reduction of total antioxidant capacity, decreased phenoloxidase activity and disruption of circadian rhythm of total hemocyte count entrained by temperature cycles. PcTRPA1-1 silencing also decreased the expression of PcHSP70 and PcHSP90 which are responsive to heat stimuli and bacterial challenge. The results collectively indicate that TRPA1 contributes to heat sensing of crayfish and is required for crayfish defense against bacterial infection.
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Hoebart C, Rojas‐Galvan NS, Ciotu CI, Aykac I, Reissig LF, Weninger WJ, Kiss A, Podesser BK, Fischer MJM, Heber S. No functional TRPA1 in cardiomyocytes. Acta Physiol (Oxf) 2021; 232:e13659. [PMID: 33819369 DOI: 10.1111/apha.13659] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 04/01/2021] [Accepted: 04/02/2021] [Indexed: 12/23/2022]
Abstract
AIM There is mounting evidence that TRPA1 has a role in cardiac physiology and pathophysiology. We aim to clarify the site of TRPA1 expression in the heart and in particular whether the channel is expressed in cardiomyocytes. METHODS Due to the high calcium conductance of TRPA1, and marginal calcium changes being detectable, microfluorimetry in primary mouse cardiomyocytes, and in the cardiomyocyte cell lines H9c2 and HL-1, was applied. TRPA1 mRNA in mouse and human hearts, primary cardiomyocytes, and the cardiac cell lines were quantified. Dorsal root ganglia served as control for both methods. RESULTS In addition to AITC, the more potent and specific TRPA1 agonists JT010 and PF-4840154 failed to elicit a TRPA1-mediated response in native and electrically paced primary cardiomyocytes, and the cardiomyocyte cell lines H9c2 and HL-1. There were only marginal levels of TRPA1 mRNA in cardiomyocytes and cardiac cell lines, also in conditions of cell differentiation or inflammation, which might occur in pathophysiological conditions. Similarly, TRPV1 agonist capsaicin did not activate primary mouse cardiomyocytes, did not alter electrically paced activity in these, and did not activate H9c2 cells or alter spontaneous activity of HL-1 cells. Human pluripotent stem cells differentiated to cardiomyocytes had no relevant TRPA1 mRNA levels. Also in human post-mortem heart samples, TRPA1 mRNA levels were substantially lower compared with the respective dorsal root ganglion. CONCLUSION The results do not question a role of TRPA1 in the heart but exclude a direct effect in cardiomyocytes.
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Affiliation(s)
- Clara Hoebart
- Center for Physiology and Pharmacology Medical University of Vienna Vienna Austria
| | | | - Cosmin I. Ciotu
- Center for Physiology and Pharmacology Medical University of Vienna Vienna Austria
| | - Ibrahim Aykac
- Center for Biomedical Research Medical University of Vienna Vienna Austria
| | | | | | - Attila Kiss
- Center for Biomedical Research Medical University of Vienna Vienna Austria
| | - Bruno K. Podesser
- Center for Biomedical Research Medical University of Vienna Vienna Austria
| | | | - Stefan Heber
- Center for Physiology and Pharmacology Medical University of Vienna Vienna Austria
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