FlyPub Date : 2017-10-02Epub Date: 2017-06-23DOI: 10.1080/19336934.2017.1344374
Jia Wern Pan, Joi McLaughlin, Haining Yang, Charles Leo, Paula Rambarat, Sumie Okuwa, Anaïs Monroy-Eklund, Sabrina Clark, Corbin D Jones, Pelin Cayirlioglu Volkan
{"title":"Comparative analysis of behavioral and transcriptional variation underlying CO<sub>2</sub> sensory neuron function and development in Drosophila.","authors":"Jia Wern Pan, Joi McLaughlin, Haining Yang, Charles Leo, Paula Rambarat, Sumie Okuwa, Anaïs Monroy-Eklund, Sabrina Clark, Corbin D Jones, Pelin Cayirlioglu Volkan","doi":"10.1080/19336934.2017.1344374","DOIUrl":"https://doi.org/10.1080/19336934.2017.1344374","url":null,"abstract":"<p><p>Carbon dioxide is an important environmental cue for many insects, regulating many behaviors including some that have direct human impacts. To further improve our understanding of how this system varies among closely related insect species, we examined both the behavioral response to CO<sub>2</sub> as well as the transcriptional profile of key developmental regulators of CO<sub>2</sub> sensory neurons in the olfactory system across the Drosophila genus. We found that CO<sub>2</sub> generally evokes repulsive behavior across most of the Drosophilids we examined, but this behavior has been lost or reduced in several lineages. Comparisons of transcriptional profiles from the developing and adult antennae for subset these species suggest that behavioral differences in some species may be due to differences in the expression of the CO<sub>2</sub> co-receptor Gr63a. Furthermore, these differences in Gr63a expression are correlated with changes in the expression of a few genes known to be involved in the development of the CO<sub>2</sub> circuit, namely dac, an important regulator of sensilla fate for sensilla that house CO<sub>2</sub> ORNs, and mip120, a member of the MMB/dREAM epigenetic regulatory complex that regulates CO<sub>2</sub> receptor expression. In contrast, most of the other known structural, molecular, and developmental components of the peripheral Drosophila CO<sub>2</sub> olfactory system seem to be well-conserved across all examined lineages. These findings suggest that certain components of CO<sub>2</sub> sensory ORN development may be more evolutionarily labile, and may contribute to differences in CO<sub>2</sub>-evoked behavioral responses across species.</p>","PeriodicalId":12128,"journal":{"name":"Fly","volume":"11 4","pages":"239-252"},"PeriodicalIF":1.2,"publicationDate":"2017-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/19336934.2017.1344374","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35114722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FlyPub Date : 2017-10-02Epub Date: 2017-04-20DOI: 10.1080/19336934.2017.1321181
Michaelyn A Hartmann, Jeff Sekelsky
{"title":"The absence of crossovers on chromosome 4 in Drosophila melanogaster: Imperfection or interesting exception?","authors":"Michaelyn A Hartmann, Jeff Sekelsky","doi":"10.1080/19336934.2017.1321181","DOIUrl":"https://doi.org/10.1080/19336934.2017.1321181","url":null,"abstract":"<p><p>Drosophila melanogaster chromosome 4 is an anomaly because of its small size, chromatin structure, and most notably its lack of crossing over during meiosis. Earlier ideas about the absence of crossovers on 4 hypothesize that these unique characteristics function to prevent crossovers. Here, we explore hypotheses about the absence of crossovers on 4, how these have been addressed, and new insights into the mechanism behind this suppression. We review recently published results that indicate that global crossover patterning, in particular the centromere effect, make a major contribution to the prevention of crossovers on 4.</p>","PeriodicalId":12128,"journal":{"name":"Fly","volume":"11 4","pages":"253-259"},"PeriodicalIF":1.2,"publicationDate":"2017-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/19336934.2017.1321181","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34927447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FlyPub Date : 2017-10-02Epub Date: 2017-08-24DOI: 10.1080/19336934.2017.1369638
Hrvoje Augustin, Jennifer Adcott, Christopher J H Elliott, Linda Partridge
{"title":"Complex roles of myoglianin in regulating adult performance and lifespan.","authors":"Hrvoje Augustin, Jennifer Adcott, Christopher J H Elliott, Linda Partridge","doi":"10.1080/19336934.2017.1369638","DOIUrl":"https://doi.org/10.1080/19336934.2017.1369638","url":null,"abstract":"<p><p>Myoglianin, the Drosophila homolog of the secreted vertebrate proteins Myostatin and GDF-11, is an important regulator of neuronal modeling, and synapse function and morphology. While Myoglianin suppression during development elicits positive effects on the neuromuscular system, genetic manipulations of myoglianin expression levels have a varied effect on the outcome of performance tests in aging flies. Specifically, Myoglianin preserves jumping ability, has no effect on negative geotaxis, and negatively regulates flight performance in aging flies. In addition, Myoglianin exhibits a tissue-specific effect on longevity, with myoglianin upregulation in glial cells increasing the median lifespan. These findings indicate complex role for this TGF-β-like protein in governing neuromuscular signaling and consequent behavioral outputs and lifespan in adult flies.</p>","PeriodicalId":12128,"journal":{"name":"Fly","volume":"11 4","pages":"284-289"},"PeriodicalIF":1.2,"publicationDate":"2017-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/19336934.2017.1369638","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35443882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FlyPub Date : 2017-10-02Epub Date: 2017-06-02DOI: 10.1080/19336934.2017.1336270
Brandon Dunn, Xianjue Ma
{"title":"The dark side of hippo signaling: A cancer promoter role.","authors":"Brandon Dunn, Xianjue Ma","doi":"10.1080/19336934.2017.1336270","DOIUrl":"https://doi.org/10.1080/19336934.2017.1336270","url":null,"abstract":"<p><p>The Hippo signaling pathway regulates organ size and tissue homeostasis. Given this role it is unsurprising that dysregulation of this pathway has implications for cancer progression. A convincing body of literature shows that the Hippo pathway serves a tumor suppressive function with its inactivation leading to massive overgrowth. However, additional studies have also shown that activation of Hippo signaling can promote tumor progression. It remains unknown how a single pathway can produce such diametrically opposed effects. This lack of knowledge is in part due to our inability to make meaningful comparisons from studies which have taken place in a variety of cell types, tissues, and organisms. Recently however, we have published 2 studies using the Drosophila wing disk to study the Hippo pathway and have found that Hippo pathway activation can promote cell migration and invasion while Hippo pathway inactivation leads to overgrowth. Thus we propose here that Drosophila can provide a research platform with which to begin addressing how the Hippo pathway can both enhance and suppress tumor progression due to published pro- and anti-tumor functionalities of the Hippo pathway in the same tissue.</p>","PeriodicalId":12128,"journal":{"name":"Fly","volume":"11 4","pages":"271-276"},"PeriodicalIF":1.2,"publicationDate":"2017-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/19336934.2017.1336270","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35054696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FlyPub Date : 2017-10-02Epub Date: 2017-06-06DOI: 10.1080/19336934.2017.1337612
Angela M Early, Andrew G Clark
{"title":"Genomic signatures of local adaptation in the Drosophila immune response.","authors":"Angela M Early, Andrew G Clark","doi":"10.1080/19336934.2017.1337612","DOIUrl":"https://doi.org/10.1080/19336934.2017.1337612","url":null,"abstract":"<p><p>As environments and pathogen landscapes shift, host defenses must evolve to remain effective. Due to this selection pressure, among-species comparisons of genetic sequence data often find immune genes to be among the fastest evolving genes across the genome. The full extent and nature of these immune adaptations, however, remain largely unexplored. In a recent study, we analyzed patterns of selection within distinct components of the Drosophila melanogaster immune pathway. While we found evidence of positive selection within some immune processes, immune genes were not universally characterized by signatures of strong selection. On the contrary, we even found that some immune functions show greater than expected constraint. Overall these results highlight 2 major factors that appear to play an outsize role in determining a gene's evolutionary rate: the type of pathogen the gene targets and the gene's position within the immune network. These results join a growing body of literature that highlight the complexity of immune adaptation. Rather than there being uniformly strong selection across all immune genes, a combination of pathogen-specificity and host genetic constraints appear to play key roles in determining each immune gene's individual evolutionary trajectory.</p>","PeriodicalId":12128,"journal":{"name":"Fly","volume":"11 4","pages":"277-283"},"PeriodicalIF":1.2,"publicationDate":"2017-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/19336934.2017.1337612","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35064606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FlyPub Date : 2017-10-02Epub Date: 2017-05-08DOI: 10.1080/19336934.2017.1327106
Ramakrishnan Kannan, Edward Giniger
{"title":"New perspectives on the roles of Abl tyrosine kinase in axon patterning.","authors":"Ramakrishnan Kannan, Edward Giniger","doi":"10.1080/19336934.2017.1327106","DOIUrl":"https://doi.org/10.1080/19336934.2017.1327106","url":null,"abstract":"<p><p>The Abelson tyrosine kinase (Abl) lies at the heart of one of the small set of ubiquitous, conserved signal transduction pathways that do much of the work of development and physiology. Abl signaling is essential to epithelial integrity, motility of autonomous cells such as blood cells, and axon growth and guidance in the nervous system. However, though Abl was one of the first of these conserved signaling machines to be identified, it has been among the last to have its essential architecture elucidated. Here we will first discuss some of the challenges that long delayed the dissection of this pathway, and what they tell us about the special problems of investigating dynamic processes like motility. We will then describe our recent experiments that revealed the functional organization of the Abl pathway in Drosophila neurons. Finally, in the second part of the review we will introduce a different kind of complexity in the role of Abl in motility: the discovery of a previously unappreciated function in protein secretion and trafficking. We will provide evidence that the secretory function of Abl also contributes to its role in axon growth and guidance, and finally end with a discussion of the challenges that Abl pleiotropy provide for the investigator, but the opportunities that it provides for coordinating biological regulation.</p>","PeriodicalId":12128,"journal":{"name":"Fly","volume":"11 4","pages":"260-270"},"PeriodicalIF":1.2,"publicationDate":"2017-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/19336934.2017.1327106","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34975999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FlyPub Date : 2017-09-26DOI: 10.1080/19336934.2017.1384103
Megha, Gaiti Hasan
{"title":"Control of protein translation by IP<sub>3</sub>R-mediated Ca<sup>2+</sup> release in Drosophila neuroendocrine cells.","authors":"Megha, Gaiti Hasan","doi":"10.1080/19336934.2017.1384103","DOIUrl":"10.1080/19336934.2017.1384103","url":null,"abstract":"<p><p>The inositol 1,4,5-trisphosphate receptor (IP<sub>3</sub>R) is one of two Ca<sup>2+</sup> channels that gates Ca<sup>2+</sup> release from ER-stores. The ligand IP<sub>3</sub>, generated upon specific G-protein coupled receptor activation, binds to IP<sub>3</sub>R to release Ca<sup>2+</sup> into the cytosol. IP<sub>3</sub>R also mediates ER-store Ca<sup>2+</sup> release into the mitochondria, under basal as well as stimulatory conditions; an activity that influences cellular bioenergetics and thus, cellular growth and proliferation. In Drosophila neuroendocrine cells expressing a hypomorphic mutant of IP<sub>3</sub>R, we observed reduced protein translation levels. Here, we discuss the possible molecular mechanism for this observation. We hypothesise that the cellular energy sensor, AMPK connects IP<sub>3</sub>R mediated Ca<sup>2+</sup> release into the mitochondria, to protein translation, via the TOR pathway.</p>","PeriodicalId":12128,"journal":{"name":"Fly","volume":" ","pages":"0"},"PeriodicalIF":1.2,"publicationDate":"2017-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/0a/45/kfly-11-04-1384103.PMC5721944.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35444560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FlyPub Date : 2017-07-03Epub Date: 2017-02-17DOI: 10.1080/19336934.2017.1295188
Paul N Adler
{"title":"Gene expression and morphogenesis during the deposition of Drosophila wing cuticle.","authors":"Paul N Adler","doi":"10.1080/19336934.2017.1295188","DOIUrl":"https://doi.org/10.1080/19336934.2017.1295188","url":null,"abstract":"<p><p>The exoskeleton of insects and other arthropods is a very versatile material that is characterized by a complex multilayer structure. In Sobala and Adler (2016) we analyzed the process of wing cuticle deposition by RNAseq and electron microscopy. In this extra view we discuss the unique aspects of the envelope the first and most outermost layer and the gene expression program seen at the end of cuticle deposition. We discussed the role of undulae in the deposition of cuticle and how the hydrophobicity of wing cuticle arises.</p>","PeriodicalId":12128,"journal":{"name":"Fly","volume":"11 3","pages":"194-199"},"PeriodicalIF":1.2,"publicationDate":"2017-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/19336934.2017.1295188","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35102962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FlyPub Date : 2017-07-03Epub Date: 2017-02-16DOI: 10.1080/19336934.2017.1295189
Donghyung Lee, Ting-Hao Huang, Aubrie De La Cruz, Antuca Callejas, Carlos Lois
{"title":"Methods to investigate the structure and connectivity of the nervous system.","authors":"Donghyung Lee, Ting-Hao Huang, Aubrie De La Cruz, Antuca Callejas, Carlos Lois","doi":"10.1080/19336934.2017.1295189","DOIUrl":"https://doi.org/10.1080/19336934.2017.1295189","url":null,"abstract":"<p><p>Understanding the computations that take place in neural circuits requires identifying how neurons in those circuits are connected to one another. In addition, recent research indicates that aberrant neuronal wiring may be the cause of several neurodevelopmental disorders, further emphasizing the importance of identifying the wiring diagrams of brain circuits. To address this issue, several new approaches have been recently developed. In this review, we describe several methods that are currently available to investigate the structure and connectivity of the brain, and discuss their strengths and limitations.</p>","PeriodicalId":12128,"journal":{"name":"Fly","volume":"11 3","pages":"224-238"},"PeriodicalIF":1.2,"publicationDate":"2017-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/19336934.2017.1295189","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34798799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FlyPub Date : 2017-07-03Epub Date: 2017-03-09DOI: 10.1080/19336934.2017.1304331
Kiel G Ormerod, Olivia K LePine, Prabhodh S Abbineni, Justin M Bridgeman, Jens R Coorssen, A Joffre Mercier, Glenn J Tattersall
{"title":"Drosophila development, physiology, behavior, and lifespan are influenced by altered dietary composition.","authors":"Kiel G Ormerod, Olivia K LePine, Prabhodh S Abbineni, Justin M Bridgeman, Jens R Coorssen, A Joffre Mercier, Glenn J Tattersall","doi":"10.1080/19336934.2017.1304331","DOIUrl":"https://doi.org/10.1080/19336934.2017.1304331","url":null,"abstract":"<p><p>Diet profoundly influences the behavior of animals across many phyla. Despite this, most laboratories using model organisms, such as Drosophila, use multiple, different, commercial or custom-made media for rearing their animals. In addition to measuring growth, fecundity and longevity, we used several behavioral and physiological assays to determine if and how altering food media influence wild-type (Canton S) Drosophila melanogaster, at larval, pupal, and adult stages. Comparing 2 commonly used commercial food media we observed several key developmental and morphological differences. Third-instar larvae and pupae developmental timing, body weight and size, and even lifespan significantly differed between the 2 diets, and some of these differences persisted into adulthood. Diet was also found to produce significantly different thermal preference, locomotory capacity for geotaxis, feeding rates, and lower muscle response to hormonal stimulation. There were no differences, however, in adult thermal preferences, in the number or viability of eggs laid, or in olfactory learning and memory between the diets. We characterized the composition of the 2 diets and found particularly significant differences in cholesterol and (phospho)lipids between them. Notably, diacylglycerol (DAG) concentrations vary substantially between the 2 diets, and may contribute to key phenotypic differences, including lifespan. Overall, the data confirm that 2 different diets can profoundly influence the behavior, physiology, morphology and development of wild-type Drosophila, with greater behavioral and physiologic differences occurring during the larval stages.</p>","PeriodicalId":12128,"journal":{"name":"Fly","volume":"11 3","pages":"153-170"},"PeriodicalIF":1.2,"publicationDate":"2017-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/19336934.2017.1304331","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34798640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}