1
|
Lin G, Tao J, Sun Y, Cui Y, Manners I, Qiu H. Breaking of Lateral Symmetry in Two-Dimensional Crystallization-Driven Self-Assembly on a Surface. J Am Chem Soc 2024; 146:14734-14744. [PMID: 38748980 DOI: 10.1021/jacs.4c02390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2024]
Abstract
Symmetry breaking is prevalent in nature and provides distinctive access to hierarchical structures for artificial materials. However, it is rarely explored in two-dimensional (2D) entities, especially for lateral asymmetry. Herein, we describe a unique symmetry breaking process in surface-initiated 2D living crystallization-driven self-assembly. The 2D epitaxial growth occurs only at one lateral side of the immobilized cylindrical micelle seeds, accessing unilateral platelets with the yield increasing with the seed length, the growth temperature, and poly(2-vinylpyridine) corona length (maximum = 92%). Generally, the tilted immobilization of seeds blocks one lateral side and triggers the lateral symmetry breaking, where the intensity and spatial arrangement of seed-surface interactions dictate the regulation. Segmented unilateral platelets with segmented corona regions are further fabricated with the addition of different blended unimers. Remarkably, discrete slope-like and dense blade-like platelet arrays grow off the surface when seeds are compactly aligned either with spherical micelles or themselves. This strategy provides nanoscale insights into the symmetry breaking in long-range self-assembly and would be promising for the design of innovative colloids and smart surfaces.
Collapse
Affiliation(s)
- Geyu Lin
- School of Chemistry and Chemical Engineering, Zhangjiang Institute for Advanced Study, Frontiers Science Center for Transformative Molecules, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Jiawei Tao
- School of Chemistry and Chemical Engineering, Zhangjiang Institute for Advanced Study, Frontiers Science Center for Transformative Molecules, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Yan Sun
- School of Chemistry and Chemical Engineering, Zhangjiang Institute for Advanced Study, Frontiers Science Center for Transformative Molecules, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Yan Cui
- School of Chemistry and Chemical Engineering, Zhangjiang Institute for Advanced Study, Frontiers Science Center for Transformative Molecules, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Ian Manners
- Department of Chemistry, University of Victoria, Victoria, British Columbia V8P5C2, Canada
| | - Huibin Qiu
- School of Chemistry and Chemical Engineering, Zhangjiang Institute for Advanced Study, Frontiers Science Center for Transformative Molecules, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| |
Collapse
|
2
|
Renaud S, Amar L, Chevret P, Romestaing C, Quéré JP, Régis C, Lebrun R. Inner ear morphology in wild versus laboratory house mice. J Anat 2024; 244:722-738. [PMID: 38214368 PMCID: PMC11021637 DOI: 10.1111/joa.13998] [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: 07/31/2023] [Revised: 12/08/2023] [Accepted: 12/08/2023] [Indexed: 01/13/2024] Open
Abstract
The semicircular canals of the inner ear are involved in balance and velocity control. Being crucial to ensure efficient mobility, their morphology exhibits an evolutionary conservatism attributed to stabilizing selection. Release of selection in slow-moving animals has been argued to lead to morphological divergence and increased inter-individual variation. In its natural habitat, the house mouse Mus musculus moves in a tridimensional space where efficient balance is required. In contrast, laboratory mice in standard cages are severely restricted in their ability to move, which possibly reduces selection on the inner ear morphology. This effect was tested by comparing four groups of mice: several populations of wild mice trapped in commensal habitats in France; their second-generation laboratory offspring, to assess plastic effects related to breeding conditions; a standard laboratory strain (Swiss) that evolved for many generations in a regime of mobility reduction; and hybrids between wild offspring and Swiss mice. The morphology of the semicircular canals was quantified using a set of 3D landmarks and semi-landmarks analyzed using geometric morphometric protocols. Levels of inter-population, inter-individual (disparity) and intra-individual (asymmetry) variation were compared. All wild mice shared a similar inner ear morphology, in contrast to the important divergence of the Swiss strain. The release of selection in the laboratory strain obviously allowed for an important and rapid drift in the otherwise conserved structure. Shared traits between the inner ear of the lab strain and domestic pigs suggested a common response to mobility reduction in captivity. The lab-bred offspring of wild mice also differed from their wild relatives, suggesting plastic response related to maternal locomotory behavior, since inner ear morphology matures before birth in mammals. The signature observed in lab-bred wild mice and the lab strain was however not congruent, suggesting that plasticity did not participate to the divergence of the laboratory strain. However, contrary to the expectation, wild mice displayed slightly higher levels of inter-individual variation than laboratory mice, possibly due to the higher levels of genetic variance within and among wild populations compared to the lab strain. Differences in fluctuating asymmetry levels were detected, with the laboratory strain occasionally displaying higher asymmetry scores than its wild relatives. This suggests that there may indeed be a release of selection and/or a decrease in developmental stability in the laboratory strain.
Collapse
Affiliation(s)
- Sabrina Renaud
- Laboratoire de Biométrie et Biologie Evolutive (LBBE), UMR 5558, CNRS, Université Claude Bernard Lyon 1, Université de Lyon, Villeurbanne, France
| | - Léa Amar
- Laboratoire de Biométrie et Biologie Evolutive (LBBE), UMR 5558, CNRS, Université Claude Bernard Lyon 1, Université de Lyon, Villeurbanne, France
| | - Pascale Chevret
- Laboratoire de Biométrie et Biologie Evolutive (LBBE), UMR 5558, CNRS, Université Claude Bernard Lyon 1, Université de Lyon, Villeurbanne, France
| | - Caroline Romestaing
- Laboratoire d'Ecologie des Hydrosystèmes Naturels et Anthropisés (LEHNA), UMR 5023, CNRS, ENTPE, Université Claude Bernard Lyon 1, Université de Lyon, Villeurbanne, France
| | - Jean-Pierre Quéré
- Centre de Biologie et Gestion des Populations (INRA/IRD/Cirad/Montpellier SupAgro), Campus International de Baillarguet, Montferrier-sur-Lez Cedex, France
| | - Corinne Régis
- Laboratoire de Biométrie et Biologie Evolutive (LBBE), UMR 5558, CNRS, Université Claude Bernard Lyon 1, Université de Lyon, Villeurbanne, France
| | - Renaud Lebrun
- Institut des Sciences de l'Évolution (ISE-M), UMR 5554, CNRS/UM/IRD/EPHE, Université de Montpellier, Montpellier, France
| |
Collapse
|
3
|
Kyratzi P, Matika O, Brassington AH, Connie CE, Xu J, Barrett DA, Emes RD, Archibald AL, Paldi A, Sinclair KD, Wattis J, Rauch C. Investigative power of Genomic Informational Field Theory (GIFT) relative to GWAS for genotype-phenotype mapping. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.04.16.589524. [PMID: 38659791 PMCID: PMC11042307 DOI: 10.1101/2024.04.16.589524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Identifying associations between phenotype and genotype is the fundamental basis of genetic analyses. Inspired by frequentist probability and the work of R.A. Fisher, genome-wide association studies (GWAS) extract information using averages and variances from genotype-phenotype datasets. Averages and variances are legitimated upon creating distribution density functions obtained through the grouping of data into categories. However, as data from within a given category cannot be differentiated, the investigative power of such methodologies is limited. Genomic Informational Field Theory (GIFT) is a method specifically designed to circumvent this issue. The way GIFT proceeds is opposite to that of GWAS. Whilst GWAS determines the extent to which genes are involved in phenotype formation (bottom-up approach), GIFT determines the degree to which the phenotype can select microstates (genes) for its subsistence (top-down approach). Doing so requires dealing with new genetic concepts, a.k.a. genetic paths, upon which significance levels for genotype-phenotype associations can be determined. By using different datasets obtained in ovis aries related to bone growth (Dataset-1) and to a series of linked metabolic and epigenetic pathways (Dataset-2), we demonstrate that removing the informational barrier linked to categories enhances the investigative and discriminative powers of GIFT, namely that GIFT extracts more information than GWAS. We conclude by suggesting that GIFT is an adequate tool to study how phenotypic plasticity and genetic assimilation are linked.
Collapse
Affiliation(s)
- Panagiota Kyratzi
- School of Veterinary Medicine and Science, University of Nottingham, College Road, Sutton Bonington, LE12 5RD, UK
- École Pratique des Hautes Études, PSL Research University, St-Antoine Research Center, Inserm U938, 34 rue Crozatier, 75012 Paris, France
| | - Oswald Matika
- Div. Genetics and Genomics, The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian EH25 9RG, Scotland, UK
| | - Amey H Brassington
- Agriculture and Horticulture Development Board, Middlemarch Business Park Siskin Parkway, East Coventry CV3 4PE, UK
| | - Clare E Connie
- School of Biosciences, University of Nottingham, College Road, Sutton Bonington, LE12 5RD, UK
| | - Juan Xu
- Shanghai Leadingtac Pharmaceutical Co., Ltd, 781 Cailun Road, China (Shanghai) Pilot Free Trade Zone, Pudong, Shanghai 201203, China
| | - David A Barrett
- Centre for Analytical Bioscience, School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK
| | - Richard D Emes
- Nottingham Trent University, 50 Shakespeare Street, Nottingham NG1 4FQ, UK
| | - Alan L Archibald
- Div. Genetics and Genomics, The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian EH25 9RG, Scotland, UK
| | - Andras Paldi
- École Pratique des Hautes Études, PSL Research University, St-Antoine Research Center, Inserm U938, 34 rue Crozatier, 75012 Paris, France
| | - Kevin D Sinclair
- Agriculture and Horticulture Development Board, Middlemarch Business Park Siskin Parkway, East Coventry CV3 4PE, UK
| | - Jonathan Wattis
- Centre for Mathematical Medicine and Biology, School of Mathematical Sciences, University of Nottingham, University Park, Nottingham NG7 2RD, UK
| | - Cyril Rauch
- School of Veterinary Medicine and Science, University of Nottingham, College Road, Sutton Bonington, LE12 5RD, UK
| |
Collapse
|
4
|
Shi C, Chen S, Liu H, Pan R, Li S, Wang Y, Wu X, Li J, Li X, Xing C, Liu X, Wang Y, Qu Q, Li G. Evolution of the gene regulatory network of body axis by enhancer hijacking in amphioxus. eLife 2024; 13:e89615. [PMID: 38231024 DOI: 10.7554/elife.89615] [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: 05/23/2023] [Accepted: 12/19/2023] [Indexed: 01/18/2024] Open
Abstract
A central goal of evolutionary developmental biology is to decipher the evolutionary pattern of gene regulatory networks (GRNs) that control embryonic development, and the mechanism underlying GRNs evolution. The Nodal signaling that governs the body axes of deuterostomes exhibits a conserved GRN orchestrated principally by Nodal, Gdf1/3, and Lefty. Here we show that this GRN has been rewired in cephalochordate amphioxus. We found that while the amphioxus Gdf1/3 ortholog exhibited nearly no embryonic expression, its duplicate Gdf1/3-like, linked to Lefty, was zygotically expressed in a similar pattern as Lefty. Consistent with this, while Gdf1/3-like mutants showed defects in axial development, Gdf1/3 mutants did not. Further transgenic analyses showed that the intergenic region between Gdf1/3-like and Lefty could drive reporter gene expression as that of the two genes. These results indicated that Gdf1/3-like has taken over the axial development role of Gdf1/3 in amphioxus, possibly through hijacking Lefty enhancers. We finally demonstrated that, to compensate for the loss of maternal Gdf1/3 expression, Nodal has become an indispensable maternal factor in amphioxus and its maternal mutants caused axial defects as Gdf1/3-like mutants. We therefore demonstrated a case that the evolution of GRNs could be triggered by enhancer hijacking events. This pivotal event has allowed the emergence of a new GRN in extant amphioxus, presumably through a stepwise process. In addition, the co-expression of Gdf1/3-like and Lefty achieved by a shared regulatory region may have provided robustness during body axis formation, which provides a selection-based hypothesis for the phenomena called developmental system drift.
Collapse
Affiliation(s)
- Chenggang Shi
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, China
| | - Shuang Chen
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, China
| | - Huimin Liu
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, China
| | - Rongrong Pan
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, China
| | - Shiqi Li
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, China
| | - Yanhui Wang
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, China
| | - Xiaotong Wu
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, China
| | - Jingjing Li
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, China
| | - Xuewen Li
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, China
| | - Chaofan Xing
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, China
| | - Xian Liu
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, China
| | - Yiquan Wang
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, China
| | - Qingming Qu
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, China
| | - Guang Li
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, China
| |
Collapse
|
5
|
Kyselicová K, Dukonyová D, Belica I, Ballová DS, Jankovičová V, Ostatníková D. Fingerprint patterns in relation to an altered neurodevelopment in patients with autism spectrum disorder. Dev Psychobiol 2023; 65:e22432. [PMID: 38010306 DOI: 10.1002/dev.22432] [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: 02/20/2023] [Revised: 09/28/2023] [Accepted: 09/29/2023] [Indexed: 11/29/2023]
Abstract
Dermatoglyphic patterns are permanently established and matured before the 24th week of gestation. Their frequencies and localization might be a good indicator of developmental instability in individuals with an altered neurodevelopment and show potential as biomarkers of autism spectrum disorder (ASD). In this study, fingerprint pattern counts and fluctuating asymmetry in the distribution of patterns are compared between 67 boys diagnosed with ASD (aged 5.11 ± 2.51 years) and 83 control boys (aged 8.58 ± 3.14 years). Boys with ASD had a higher rate of discordance in their fingerprint patterns (p = .0026), showing more often bilateral differences in the occurrence of certain patterns. A chi-square test revealed that the difference in pattern frequencies between boys with ASD and the control group is the most significant in frequencies of whorls, tented arches, and ulnar loops. Boys with ASD have significantly fewer ulnar loops, significantly more whorls, and tented arches in the right hand. The achieved results are in favor of the suggestion that prenatal influences, which play a role in the development of bilateral differences in fingerprint patterns up to the 24th week of gestation, may be a potential cause of an altered neurodevelopment in ASD individuals.
Collapse
Affiliation(s)
- Klaudia Kyselicová
- Academic Research Center for Autism, Institute of Physiology, Faculty of Medicine, Comenius University Bratislava, Bratislava, Slovakia
| | - Dóra Dukonyová
- Academic Research Center for Autism, Institute of Physiology, Faculty of Medicine, Comenius University Bratislava, Bratislava, Slovakia
| | - Ivan Belica
- Academic Research Center for Autism, Institute of Physiology, Faculty of Medicine, Comenius University Bratislava, Bratislava, Slovakia
| | - Dominika Sónak Ballová
- Faculty of Civil Engineering, Slovak University of Technology in Bratislava, Bratislava, Slovakia
| | - Viktória Jankovičová
- Faculty of Natural Sciences, Comenius University Bratislava, Bratislava, Slovakia
| | - Daniela Ostatníková
- Academic Research Center for Autism, Institute of Physiology, Faculty of Medicine, Comenius University Bratislava, Bratislava, Slovakia
| |
Collapse
|
6
|
Schröder M, Windhager S, Schaefer K, Ahnelt H. Adaptability of Bony Armor Elements of the Threespine Stickleback Gasterosteus aculeatus (Teleostei: Gasterosteidae): Ecological and Evolutionary Insights from Symmetry Analyses. Symmetry (Basel) 2023. [DOI: 10.3390/sym15040811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023] Open
Abstract
Differentiation in the defensive armor of the threespine stickleback, Gasterosteus aculeatus, is caused by predator-driven divergent selection. Most studies considered armor traits related to swimming behavior, hence combining pre- and post-capture responses to gape-limited predators. Here, we focus exclusively on the defensive complex (DC), the post-capture predator defense. This complex consists of a series of bony elements surrounding the anterior part of the abdomen. Relaxation from predation pressure not only drives reduction of bony elements but is also expected to increase asymmetry in the DC. To test this hypothesis, we used four Austrian freshwater populations that differed distinctly in the formation of the DC. We found significant left–right asymmetries in the DC in the population with a distinctly reduced DC and, surprisingly, also in the population with a significantly enhanced DC. These populations occur in vastly different habitats (stream and lake) characterized by distinct regimes of gape-limited predators (none vs. many). Apparently, both a shift to very low and very high pressure by gape-limited predators can boost asymmetry. We conclude that greater asymmetries in the two populations at the opposite ends of the predatory gradient result from an ongoing process of adaptation to decreased or increased environmental stress.
Collapse
|
7
|
Directional asymmetry in gonad length indicates moray eels (Teleostei, Anguilliformes, Muraenidae) are "right-gonadal". Sci Rep 2023; 13:2963. [PMID: 36807600 PMCID: PMC9941099 DOI: 10.1038/s41598-023-29218-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Accepted: 01/31/2023] [Indexed: 02/22/2023] Open
Abstract
Directional asymmetry indicates a unidirectional deviation from perfect bilateral symmetry, which was rarely examined in the inner organs of the teleost (Teleostei) compared to external traits. This study examines the directional asymmetry in the gonad length of 20 species of moray eels (Muraenidae) and two outgroup species with 2959 individuals. We tested three hypotheses: (1) moray eel species did not exhibit directional asymmetry in the gonad length; (2) the directional asymmetry pattern was the same for all selected species; (3) the directional asymmetry was not related to the major habitat types, depth and size classes, and taxonomic closeness of the species. Moray eels were generally "right-gonadal", the right gonad length being constantly and significantly longer than the left one in all studied Muraenidae species. The degree of asymmetry varied among species and was not significantly related to taxonomic closeness. The habitat types, depth, and size classes had intermingled effects on observed asymmetry without a clear correspondence. The directional asymmetry in the gonad length is a unique and widely occurring phenomenon in the Family Muraenidae, which was likely a by-product in the evolutionary history without significant disadvantage in survival.
Collapse
|
8
|
Does male gonopodial morphology affect male-female mating positioning in the livebearing fish Xenophallus umbratilis? PLoS One 2023; 18:e0281267. [PMID: 36730316 PMCID: PMC9894382 DOI: 10.1371/journal.pone.0281267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 01/18/2023] [Indexed: 02/03/2023] Open
Abstract
Xenophallus umbratilis is a freshwater livebearing fish that exhibits unique antisymmetry in the male gonopodium, which terminates in either a dextral or sinistral twist. This asymmetry in the gonopodium suggests that males might exhibit side-biased behavior when interacting with females to mate. We conducted two assays to assess the laterality of male and female mating interactions based on gonopodial morphology. We observed lateralized mating behavior in one test where males with sinistral gonopodial morphology interacted with a single female. However, we did not find lateralized mating behavior in males with dextral gonopodial morphology. We also examined male and female positioning in trials that placed a single female with five males, all with the same morphology. These trials also showed no evidence of lateralized body positioning.
Collapse
|
9
|
Yoshimura T, Sasaki T. Hyperstrophic Malformation of Lunella correensis (Récluz, 1853) (Vetigastropoda: Turbinidae). MALACOLOGIA 2022. [DOI: 10.4002/040.065.0110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Taro Yoshimura
- The University Museum, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Takenori Sasaki
- The University Museum, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| |
Collapse
|
10
|
Taking Sides: Asymmetries in the Evolution of Human Brain Development in Better Understanding Autism Spectrum Disorder. Symmetry (Basel) 2022. [DOI: 10.3390/sym14122689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Confirmation from structural, functional, and behavioral studies agree and suggest a configuration of atypical lateralization in individuals with autistic spectrum disorders (ASD). It is suggested that patterns of cortical and behavioral atypicality are evident in individuals with ASDs with atypical lateralization being common in individuals with ASDs. The paper endeavors to better understand the relationship between alterations in typical cortical asymmetries and functional lateralization in ASD in evolutionary terms. We have proposed that both early genetic and/or environmental influences can alter the developmental process of cortical lateralization. There invariably is a “chicken or egg” issue that arises whether atypical cortical anatomy associated with abnormal function, or alternatively whether functional atypicality generates abnormal structure.
Collapse
|
11
|
Porras Hernández AM, Tenje M, Antfolk M. Cell chirality exhibition of brain microvascular endothelial cells is dependent on micropattern width. RSC Adv 2022; 12:30135-30144. [PMID: 36329947 PMCID: PMC9585451 DOI: 10.1039/d2ra05434e] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 10/14/2022] [Indexed: 11/07/2022] Open
Abstract
Left-right asymmetry is a conserved property in nature and observed in the human body, a property known as cell chirality. Cell chirality is often studied using micropatterned in vitro models. However, micropattern geometry and size often varies across different studies, making it challenging to compare results. Here, we utilized micropatterned RGD-peptide lines on hyaluronic acid hydrogels to investigate the effect of the micropattern width on the exhibited cell chirality bias of brain microvascular endothelial cells. Overall, this cell type exhibited a negative chirality bias on micropatterned lines ranging from 10 μm to 400 μm in width, where the negative bias was most pronounced on the 100 μm wide lines. We also observed that this exhibited chirality bias varied across the line width. This work serves as a guide to determine optimal micropattern width for further investigations on cell chirality bias and its prominence in e.g., disease states or upon exposure to toxic substances. Brain endothelial microvascular cell chirality is dependent on micropattern width and spatial localization. Finding the optimal micropattern width and including only the centre cells in the analysis for chirality-based experiments might improve further experimental results.![]()
Collapse
Affiliation(s)
- Ana María Porras Hernández
- Dept. of Materials Science and Engineering, Science for Life Laboratory, Uppsala University Uppsala Sweden
| | - Maria Tenje
- Dept. of Materials Science and Engineering, Science for Life Laboratory, Uppsala University Uppsala Sweden
| | - Maria Antfolk
- Dept. of Biomedical Engineering, Lund University Lund Sweden .,Biotech Research and Innovation Centre, University of Copenhagen Copenhagen Denmark
| |
Collapse
|
12
|
Newman SA. Inherency and agency in the origin and evolution of biological functions. Biol J Linn Soc Lond 2022. [DOI: 10.1093/biolinnean/blac109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
Although discussed by 20th century philosophers in terms drawn from the sciences of non-living systems, in recent decades biological function has been considered in relationship to organismal capability and purpose. Bringing two phenomena generally neglected in evolutionary theory (i.e. inherency and agency) to bear on questions of function leads to a rejection of the adaptationist ‘selected effects’ notion of biological function. I review work showing that organisms such as the placozoans can thrive with almost no functional embellishments beyond those of their constituent cells and physical properties of their simple tissues. I also discuss work showing that individual tissue cells and their artificial aggregates exhibit agential behaviours that are unprecedented in the histories of their respective lineages. I review findings on the unique metazoan mechanism of developmental gene expression that has recruited, during evolution, inherent ancestral cellular functionalities into specialized cell types and organs of the different animal groups. I conclude that most essential functions in animal species are inherent to the cells from which they evolved, not selected effects, and that many of the others are optional ‘add-ons’, a status inimical to fitness-based models of evolution positing that traits emerge from stringent cycles of selection to meet external challenges.
Collapse
Affiliation(s)
- Stuart A Newman
- Department of Cell Biology & Anatomy, New York Medical College , Valhalla, NY 10595 , USA
| |
Collapse
|
13
|
Abstract
AbstractEvolvability is best addressed from a multi-level, macroevolutionary perspective through a comparative approach that tests for among-clade differences in phenotypic diversification in response to an opportunity, such as encountered after a mass extinction, entering a new adaptive zone, or entering a new geographic area. Analyzing the dynamics of clades under similar environmental conditions can (partially) factor out shared external drivers to recognize intrinsic differences in evolvability, aiming for a macroevolutionary analog of a common-garden experiment. Analyses will be most powerful when integrating neontological and paleontological data: determining differences among extant populations that can be hypothesized to generate large-scale, long-term contrasts in evolvability among clades; or observing large-scale differences among clade histories that can by hypothesized to reflect contrasts in genetics and development observed directly in extant populations. However, many comparative analyses can be informative on their own, as explored in this overview. Differences in clade-level evolvability can be visualized in diversity-disparity plots, which can quantify positive and negative departures of phenotypic productivity from stochastic expectations scaled to taxonomic diversification. Factors that evidently can promote evolvability include modularity—when selection aligns with modular structure or with morphological integration patterns; pronounced ontogenetic changes in morphology, as in allometry or multiphase life cycles; genome size; and a variety of evolutionary novelties, which can also be evaluated using macroevolutionary lags between the acquisition of a trait and phenotypic diversification, and dead-clade-walking patterns that may signal a loss of evolvability when extrinsic factors can be excluded. High speciation rates may indirectly foster phenotypic evolvability, and vice versa. Mechanisms are controversial, but clade evolvability may be higher in the Cambrian, and possibly early in the history of clades at other times; in the tropics; and, for marine organisms, in shallow-water disturbed habitats.
Collapse
|
14
|
Swank S, Elazegui E, Janidlo S, Sanger TJ, Bell MA, Stuart YE. Attempting genetic inference from directional asymmetry during convergent hindlimb reduction in squamates. Ecol Evol 2022; 12:e9088. [PMID: 35845359 PMCID: PMC9280442 DOI: 10.1002/ece3.9088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Revised: 05/22/2022] [Accepted: 06/14/2022] [Indexed: 11/06/2022] Open
Abstract
Loss and reduction in paired appendages are common in vertebrate evolution. How often does such convergent evolution depend on similar developmental and genetic pathways? For example, many populations of the threespine stickleback and ninespine stickleback (Gasterosteidae) have independently evolved pelvic reduction, usually based on independent mutations that caused reduced Pitx1 expression. Reduced Pitx1 expression has also been implicated in pelvic reduction in manatees. Thus, hindlimb reduction stemming from reduced Pitx1 expression has arisen independently in groups that diverged tens to hundreds of millions of years ago, suggesting a potential for repeated use of Pitx1 across vertebrates. Notably, hindlimb reduction based on the reduction in Pitx1 expression produces left-larger directional asymmetry in the vestiges. We used this phenotypic signature as a genetic proxy, testing for hindlimb directional asymmetry in six genera of squamate reptiles that independently evolved hindlimb reduction and for which genetic and developmental tools are not yet developed: Agamodon anguliceps, Bachia intermedia, Chalcides sepsoides, Indotyphlops braminus, Ophisaurus attenuatuas and O. ventralis, and Teius teyou. Significant asymmetry occurred in one taxon, Chalcides sepsoides, whose left-side pelvis and femur vestiges were 18% and 64% larger than right-side vestiges, respectively, suggesting modification in Pitx1 expression in that species. However, there was either right-larger asymmetry or no directional asymmetry in the other five taxa, suggesting multiple developmental genetic pathways to hindlimb reduction in squamates and the vertebrates more generally.
Collapse
Affiliation(s)
- Samantha Swank
- Department of Biology Loyola University Chicago Chicago Illinois USA.,Committee on Development, Regeneration, and Stem Cell Biology University of Chicago Chicago Illinois USA
| | - Ethan Elazegui
- Department of Biology Loyola University Chicago Chicago Illinois USA
| | - Sophia Janidlo
- Department of Biology Loyola University Chicago Chicago Illinois USA
| | - Thomas J Sanger
- Department of Biology Loyola University Chicago Chicago Illinois USA
| | - Michael A Bell
- UC Museum of Paleontology University of California Berkeley California USA
| | - Yoel E Stuart
- Department of Biology Loyola University Chicago Chicago Illinois USA
| |
Collapse
|
15
|
Torres-Dowdall J, Rometsch SJ, Velasco JR, Aguilera G, Kautt AF, Goyenola G, Petry AC, Deprá GC, da Graça WJ, Meyer A. Genetic assimilation and the evolution of direction of genital asymmetry in anablepid fishes. Proc Biol Sci 2022; 289:20220266. [PMID: 35538779 PMCID: PMC9091857 DOI: 10.1098/rspb.2022.0266] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Phylogenetic comparative studies suggest that the direction of deviation from bilateral symmetry (sidedness) might evolve through genetic assimilation; however, the changes in sidedness inheritance remain largely unknown. We investigated the evolution of genital asymmetry in fish of the family Anablepidae, in which males' intromittent organ (the gonopodium, a modified anal fin) bends asymmetrically to the left or the right. In most species, males show a 1 : 1 ratio of left-to-right-sided gonopodia. However, we found that in three species left-sided males are significantly more abundant than right-sided ones. We mapped sidedness onto a new molecular phylogeny, finding that this left-sided bias likely evolved independently three times. Our breeding experiment in a species with an excess of left-sided males showed that sires produced more left-sided offspring independently of their own sidedness. We propose that sidedness might be inherited as a threshold trait, with different thresholds across species. This resolves the apparent paradox that, while there is evidence for the evolution of sidedness, commonly there is a lack of support for its heritability and no response to artificial selection. Focusing on the heritability of the left : right ratio of offspring, rather than on individual sidedness, is key for understanding how the direction of asymmetry becomes genetically assimilated.
Collapse
Affiliation(s)
- Julián Torres-Dowdall
- Department of Biology, Zoology and Evolutionary Biology, University of Konstanz, 78457 Konstanz, Germany
| | - Sina J. Rometsch
- Department of Biology, Zoology and Evolutionary Biology, University of Konstanz, 78457 Konstanz, Germany
| | - Jacobo Reyes Velasco
- Department of Biology, Zoology and Evolutionary Biology, University of Konstanz, 78457 Konstanz, Germany
| | - Gastón Aguilera
- Unidad Ejecutora Lillo (CONICET), Fundación Miguel Lillo, Tucumán, Argentina
| | - Andreas F. Kautt
- Department of Biology, Zoology and Evolutionary Biology, University of Konstanz, 78457 Konstanz, Germany
| | - Guillermo Goyenola
- Departamento de Ecología y Gestión Ambiental, Centro Universitario Regional del Este, Universidad de la República, Uruguay
| | - Ana C. Petry
- Instituto de Biodiversidade e Sustentabilidade, Universidade Federal do Rio de Janeiro, Macaé, Brazil
| | - Gabriel C. Deprá
- Departamento de Biologia, Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais, Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura, Centro de Ciências Biológicas, Universidade Estadual de Maringá, Maringá, Brazil
| | - Weferson J. da Graça
- Departamento de Biologia, Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais, Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura, Centro de Ciências Biológicas, Universidade Estadual de Maringá, Maringá, Brazil
| | - Axel Meyer
- Department of Biology, Zoology and Evolutionary Biology, University of Konstanz, 78457 Konstanz, Germany
| |
Collapse
|
16
|
Martin KC, Seydell-Greenwald A, Berl MM, Gaillard WD, Turkeltaub PE, Newport EL. A Weak Shadow of Early Life Language Processing Persists in the Right Hemisphere of the Mature Brain. NEUROBIOLOGY OF LANGUAGE (CAMBRIDGE, MASS.) 2022; 3:364-385. [PMID: 35686116 PMCID: PMC9169899 DOI: 10.1162/nol_a_00069] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 02/10/2022] [Indexed: 06/15/2023]
Abstract
Studies of language organization show a striking change in cerebral dominance for language over development: We begin life with a left hemisphere (LH) bias for language processing, which is weaker than that in adults and which can be overcome if there is a LH injury. Over development this LH bias becomes stronger and can no longer be reversed. Prior work has shown that this change results from a significant reduction in the magnitude of language activation in right hemisphere (RH) regions in adults compared to children. Here we investigate whether the spatial distribution of language activation, albeit weaker in magnitude, still persists in homotopic RH regions of the mature brain. Children aged 4-13 (n = 39) and young adults (n = 14) completed an auditory sentence comprehension fMRI (functional magnetic resonance imaging) task. To equate neural activity across the hemispheres, we applied fixed cutoffs for the number of active voxels that would be included in each hemisphere for each participant. To evaluate homotopicity, we generated left-right flipped versions of each activation map, calculated spatial overlap between the LH and RH activity in frontal and temporal regions, and tested for mean differences in the spatial overlap values between the age groups. We found that, in children as well as in adults, there was indeed a spatially intact shadow of language activity in the right frontal and temporal regions homotopic to the LH language regions. After a LH stroke in adulthood, recovering early-life activation in these regions might assist in enhancing recovery of language abilities.
Collapse
Affiliation(s)
- Kelly C. Martin
- Center for Brain Plasticity and Recovery, Georgetown University Medical Center, Washington, DC
| | - Anna Seydell-Greenwald
- Center for Brain Plasticity and Recovery, Georgetown University Medical Center, Washington, DC
- MedStar National Rehabilitation Hospital, Washington, DC
| | - Madison M. Berl
- Center for Brain Plasticity and Recovery, Georgetown University Medical Center, Washington, DC
- Children’s National Hospital, Washington, DC
| | - William D. Gaillard
- Center for Brain Plasticity and Recovery, Georgetown University Medical Center, Washington, DC
- Children’s National Hospital, Washington, DC
| | - Peter E. Turkeltaub
- Center for Brain Plasticity and Recovery, Georgetown University Medical Center, Washington, DC
- MedStar National Rehabilitation Hospital, Washington, DC
| | - Elissa L. Newport
- Center for Brain Plasticity and Recovery, Georgetown University Medical Center, Washington, DC
- MedStar National Rehabilitation Hospital, Washington, DC
| |
Collapse
|
17
|
Adreani NM, Valcu M, Scientists C, Mentesana L. Asymmetric architecture is non-random and repeatable in a bird’s nests. Curr Biol 2022; 32:R412-R413. [DOI: 10.1016/j.cub.2022.03.075] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
18
|
Cerebral Polymorphisms for Lateralisation: Modelling the Genetic and Phenotypic Architectures of Multiple Functional Modules. Symmetry (Basel) 2022. [DOI: 10.3390/sym14040814] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Recent fMRI and fTCD studies have found that functional modules for aspects of language, praxis, and visuo-spatial functioning, while typically left, left and right hemispheric respectively, frequently show atypical lateralisation. Studies with increasing numbers of modules and participants are finding increasing numbers of module combinations, which here are termed cerebral polymorphisms—qualitatively different lateral organisations of cognitive functions. Polymorphisms are more frequent in left-handers than right-handers, but it is far from the case that right-handers all show the lateral organisation of modules described in introductory textbooks. In computational terms, this paper extends the original, monogenic McManus DC (dextral-chance) model of handedness and language dominance to multiple functional modules, and to a polygenic DC model compatible with the molecular genetics of handedness, and with the biology of visceral asymmetries found in primary ciliary dyskinesia. Distributions of cerebral polymorphisms are calculated for families and twins, and consequences and implications of cerebral polymorphisms are explored for explaining aphasia due to cerebral damage, as well as possible talents and deficits arising from atypical inter- and intra-hemispheric modular connections. The model is set in the broader context of the testing of psychological theories, of issues of laterality measurement, of mutation-selection balance, and the evolution of brain and visceral asymmetries.
Collapse
|
19
|
Harry CJ, Messar SM, Ragsdale EJ. Comparative reconstruction of the predatory feeding structures of the polyphenic nematode Pristionchus pacificus. Evol Dev 2022; 24:16-36. [PMID: 35239990 PMCID: PMC9286642 DOI: 10.1111/ede.12397] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 01/06/2022] [Accepted: 02/01/2022] [Indexed: 12/25/2022]
Abstract
Pristionchus pacificus is a nematode model for the developmental genetics of morphological polyphenism, especially at the level of individual cells. Morphological polyphenism in this species includes an evolutionary novelty, moveable teeth, which have enabled predatory feeding in this species and others in its family (Diplogastridae). From transmission electron micrographs of serial thin sections through an adult hermaphrodite of P. pacificus, we three‐dimensionally reconstructed all epithelial and myoepithelial cells and syncytia, corresponding to 74 nuclei, of its face, mouth, and pharynx. We found that the epithelia that produce the predatory morphology of P. pacificus are identical to Caenorhabditis elegans in the number of cell classes and nuclei. However, differences in cell form, spatial relationships, and nucleus position correlate with gross morphological differences from C. elegans and outgroups. Moreover, we identified fine‐structural features, especially in the anteriormost pharyngeal muscles, that underlie the conspicuous, left‐right asymmetry that characterizes the P. pacificus feeding apparatus. Our reconstruction provides an anatomical map for studying the genetics of polyphenism, feeding behavior, and the development of novel form in a satellite model to C. elegans. All cells making the dimorphic, novel form of an animal with cell constancy were identified. Although the number of cells is fully conserved, divergence in form and connectivity—including fixed asymmetries—sheds light on the origins of this trait.
Collapse
Affiliation(s)
- Clayton J Harry
- Department of Biology, Indiana University, Bloomington, Indiana, USA
| | - Sonia M Messar
- Department of Biology, Indiana University, Bloomington, Indiana, USA
| | - Erik J Ragsdale
- Department of Biology, Indiana University, Bloomington, Indiana, USA
| |
Collapse
|
20
|
The physical basis of mollusk shell chiral coiling. Proc Natl Acad Sci U S A 2021; 118:2109210118. [PMID: 34810260 DOI: 10.1073/pnas.2109210118] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/30/2021] [Indexed: 12/14/2022] Open
Abstract
Snails are model organisms for studying the genetic, molecular, and developmental bases of left-right asymmetry in Bilateria. However, the development of their typical helicospiral shell, present for the last 540 million years in environments as different as the abyss or our gardens, remains poorly understood. Conversely, ammonites typically have a bilaterally symmetric, planispiraly coiled shell, with only 1% of 3,000 genera displaying either a helicospiral or a meandering asymmetric shell. A comparative analysis suggests that the development of chiral shells in these mollusks is different and that, unlike snails, ammonites with asymmetric shells probably had a bilaterally symmetric body diagnostic of cephalopods. We propose a mathematical model for the growth of shells, taking into account the physical interaction during development between the soft mollusk body and its hard shell. Our model shows that a growth mismatch between the secreted shell tube and a bilaterally symmetric body in ammonites can generate mechanical forces that are balanced by a twist of the body, breaking shell symmetry. In gastropods, where a twist is intrinsic to the body, the same model predicts that helicospiral shells are the most likely shell forms. Our model explains a large diversity of forms and shows that, although molluscan shells are incrementally secreted at their opening, the path followed by the shell edge and the resulting form are partly governed by the mechanics of the body inside the shell, a perspective that explains many aspects of their development and evolution.
Collapse
|
21
|
Swank S, Sanger TJ, Stuart YE. (Non)Parallel developmental mechanisms in vertebrate appendage reduction and loss. Ecol Evol 2021; 11:15484-15497. [PMID: 34824770 PMCID: PMC8601893 DOI: 10.1002/ece3.8226] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 08/31/2021] [Accepted: 09/21/2021] [Indexed: 01/16/2023] Open
Abstract
Appendages have been reduced or lost hundreds of times during vertebrate evolution. This phenotypic convergence may be underlain by shared or different molecular mechanisms in distantly related vertebrate clades. To investigate, we reviewed the developmental and evolutionary literature of appendage reduction and loss in more than a dozen vertebrate genera from fish to mammals. We found that appendage reduction and loss was nearly always driven by modified gene expression as opposed to changes in coding sequences. Moreover, expression of the same genes was repeatedly modified across vertebrate taxa. However, the specific mechanisms by which expression was modified were rarely shared. The multiple routes to appendage reduction and loss suggest that adaptive loss of function phenotypes might arise routinely through changes in expression of key developmental genes.
Collapse
Affiliation(s)
- Samantha Swank
- Department of BiologyLoyola University ChicagoChicagoIllinoisUSA
| | - Thomas J. Sanger
- Department of BiologyLoyola University ChicagoChicagoIllinoisUSA
| | - Yoel E. Stuart
- Department of BiologyLoyola University ChicagoChicagoIllinoisUSA
| |
Collapse
|
22
|
A New Integrated Tool to Calculate and Map Bilateral Asymmetry on Three-Dimensional Digital Models. Symmetry (Basel) 2021. [DOI: 10.3390/sym13091644] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
The observation and the quantification of asymmetry in biological structures are deeply investigated in geometric morphometrics. Patterns of asymmetry were explored in both living and fossil species. In living organisms, levels of directional and fluctuating asymmetry are informative about developmental processes and health status of the individuals. Paleontologists are primarily interested in asymmetric features introduced by the taphonomic process, as they may significantly alter the original shape of the biological remains, hampering the interpretation of morphological features which may have profound evolutionary significance. Here, we provide a new R tool that produces the numerical quantification of fluctuating and directional asymmetry and charts asymmetry directly on the specimens under study, allowing the visual inspection of the asymmetry pattern. We tested this show.asymmetry algorithm, written in the R language, on fossil and living cranial remains of the genus Homo. show.asymmetry proved successful in discriminating levels of asymmetry among sexes in Homo sapiens, to tell apart fossil from living Homo skulls, to map effectively taphonomic distortion directly on the fossil skulls, and to provide evidence that digital restoration obliterates natural asymmetry to unnaturally low levels.
Collapse
|
23
|
Benítez HA, Sukhodolskaya RA, Órdenes-Claveria R, Vavilov DN, Ananina T. Assessing the shape plasticity between Russian biotopes in Pterostichus dilutipes (Motschulsky, 1844) (Coleoptera: Carabidae) a geometric morphometric approach. ZOOL ANZ 2021. [DOI: 10.1016/j.jcz.2021.06.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
24
|
Gómez-Ramírez J, González-Rosa JJ. Intra- and interhemispheric symmetry of subcortical brain structures: a volumetric analysis in the aging human brain. Brain Struct Funct 2021; 227:451-462. [PMID: 34089103 DOI: 10.1007/s00429-021-02305-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Accepted: 05/19/2021] [Indexed: 12/20/2022]
Abstract
Here, we address the hemispheric interdependency of subcortical structures in the aging human brain. In particular, we investigated whether subcortical volume variations can be explained by the adjacency of structures in the same hemisphere or are due to the interhemispheric development of mirror subcortical structures in the brain. Seven subcortical structures in each hemisphere were automatically segmented in a large sample of 3312 magnetic resonance imaging (MRI) studies of elderly individuals in their 70s and 80s. We performed Eigenvalue analysis, and found that anatomic volumes in the limbic system and basal ganglia show similar statistical dependency whether considered in the same hemisphere (intrahemispherically) or different hemispheres (interhemispherically). Our results indicate that anatomic bilaterality of subcortical volumes is preserved in the aging human brain, supporting the hypothesis that coupling between non-adjacent subcortical structures might act as a mechanism to compensate for the deleterious effects of aging.
Collapse
Affiliation(s)
| | - Javier J González-Rosa
- Department of Psychology, Universidad de Cádiz, Cádiz, Spain
- Instituto de Investigación Biomédica de Cádiz (INIBICA), Cádiz, Spain
| |
Collapse
|
25
|
Berthaume MA, Bull AMJ. Cyamella (a popliteal sesamoid bone) prevalence: A systematic review, meta-analysis, and proposed classification system. Clin Anat 2021; 34:810-820. [PMID: 33905585 DOI: 10.1002/ca.23743] [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: 07/06/2020] [Revised: 01/26/2021] [Accepted: 03/01/2021] [Indexed: 01/05/2023]
Abstract
The cyamella is a rare, generally asymptomatic, knee sesamoid bone located in the proximal tendon of the popliteal muscle. Only two studies have investigated cyamella presence/absence in humans, putting ossified prevalence rates at 0.57%-1.8%. We aim to (a) determine cyamella prevalence in a Korean population, (b) examine coincident development of the cyamella and fabella, and (c) perform a systematic review and meta-analysis on the cyamella in humans. Medical computed tomography scans of 106 individuals were reviewed. A systematic review and meta-analysis were performed following PRISMA guidelines. Cyamellae were found in 3/212 knees (1.4%), and presence/absence was uncorrelated to height, age, and sex. The cyamella was not found coincidentally with the fabella, although the statistical power was low. Our systematic review/meta-analysis revealed cyamellae were generally asymptomatic and ossification could occur at 14 years. Cyamellae were equally likely to be found in both sexes, knees, one or both knees, and there appeared to be no global variation in prevalence rates. Cyamellae were found in three distinct locations. There is little support for the role of intrinsic genetic and/or environmental factors in cyamella development in humans. However, the apparent phylogenetic signal in Primates suggests genetics plays a role in cyamella development. We propose a cyamella classification system based on cyamella location (Class I, popliteal sulcus; Class II, tibial condyle; Class III, fibular head) and hypothesize locations may correspond to distinct developmental pathways, and cyamella function may vary with location.
Collapse
Affiliation(s)
- Michael A Berthaume
- Department of Bioengineering, Imperial College London, London, UK.,Division of Mechanical Engineering and Design, London South Bank University, London, UK
| | - Anthony M J Bull
- Department of Bioengineering, Imperial College London, London, UK
| |
Collapse
|
26
|
Abstract
The alignment of visceral and brain asymmetry observed in some vertebrate species raises the question of whether this association also exists in humans. While the visceral and brain systems may have developed asymmetry for different reasons, basic visceral left–right differentiation mechanisms could have been duplicated to establish brain asymmetry. We describe the main phenotypical anomalies and the general mechanism of left–right differentiation of vertebrate visceral and brain laterality. Next, we systematically review the available human studies that explored the prevalence of atypical behavioral and brain asymmetry in visceral situs anomalies, which almost exclusively involved participants with the mirrored visceral organization (situs inversus). The data show no direct link between human visceral and brain functional laterality as most participants with situs inversus show the typical population bias for handedness and brain functional asymmetry, although an increased prevalence of functional crowding may be present. At the same time, several independent studies present evidence for a possible relation between situs inversus and the gross morphological asymmetry of the brain torque with potential differences between subtypes of situs inversus with ciliary and non-ciliary etiologies.
Collapse
|
27
|
Spirov AV, Levchenko VF, Sabirov MA. Concepts of Canalization and Genetic
Assimilation in Developmental Biology: Current Approaches and Studies. J EVOL BIOCHEM PHYS+ 2021. [DOI: 10.1134/s0022093021010014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
|
28
|
Barazandeh M, Cameron CB, Miyashita T. Zoological Endeavors Inspired by A. Richard Palmer: Interview. CAN J ZOOL 2020. [DOI: 10.1139/cjz-2020-0273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Marjan Barazandeh
- Faculty of Pharmaceutical Sciences, The University of British Columbia, 2405 Wesbrook Mall, Vancouver, BC V6T 1Z3, Canada
| | - Christopher B. Cameron
- Département de sciences biologiques, Université de Montréal, 1375, avenue Thérèse-Lavoie-Roux, Montréal, QC H2V 0B3, Canada
| | - Tetsuto Miyashita
- Canadian Museum of Nature, P.O. Box 3443, Station D, Ottawa, ON K1P 6P4, Canada
| |
Collapse
|
29
|
Eriksson M, Czene K, Strand F, Zackrisson S, Lindholm P, Lång K, Förnvik D, Sartor H, Mavaddat N, Easton D, Hall P. Identification of Women at High Risk of Breast Cancer Who Need Supplemental Screening. Radiology 2020; 297:327-333. [PMID: 32897160 DOI: 10.1148/radiol.2020201620] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Background Mammography screening reduces breast cancer mortality, but a proportion of breast cancers are missed and are detected at later stages or develop during between-screening intervals. Purpose To develop a risk model based on negative mammograms that identifies women likely to be diagnosed with breast cancer before or at the next screening examination. Materials and Methods This study was based on the prospective screening cohort Karolinska Mammography Project for Risk Prediction of Breast Cancer (KARMA), 2011-2017. An image-based risk model was developed by using the Stratus method and computer-aided detection mammographic features (density, masses, microcalcifications), differences in the left and right breasts, and age. The lifestyle extended model included menopausal status, family history of breast cancer, body mass index, hormone replacement therapy, and use of tobacco and alcohol. The genetic extended model included a polygenic risk score with 313 single nucleotide polymorphisms. Age-adjusted relative risks and tumor subtype specific risks were estimated by using logistic regression, and absolute risks were calculated. Results Of 70 877 participants in the KARMA cohort, 974 incident cancers were sampled from 9376 healthy women (mean age, 54 years ± 10 [standard deviation]). The area under the receiver operating characteristic curve (AUC) for the image-based model was 0.73 (95% confidence interval [CI]: 0.71, 0.74). The AUCs for the lifestyle and genetic extended models were 0.74 (95% CI: 0.72, 0.75) and 0.77 (95% CI: 0.75, 0.79), respectively. There was a relative eightfold difference in risk between women at high risk and those at general risk. High-risk women were more likely to be diagnosed with stage II cancers and with tumors 20 mm or larger and were less likely to have stage I and estrogen receptor-positive tumors. The image-based model was validated in three external cohorts. Conclusion By combining three mammographic features, differences in the left and right breasts, and optionally lifestyle factors and family history and a polygenic risk score, the model identified women at high likelihood of being diagnosed with breast cancer within 2 years of a negative screening examination and in possible need of supplemental screening. © RSNA, 2020 Online supplemental material is available for this article.
Collapse
Affiliation(s)
- Mikael Eriksson
- From the Department of Medical Epidemiology and Biostatistics (M.E., K.C., P.H.) and Department of Oncology-Pathology (F.S.), Karolinska Institutet, Nobelsv 12A, Stockholm 171 77, Sweden; Department of Breast Radiology, Karolinska University Hospital, Stockholm, Sweden (F.S.); Department of Diagnostic Radiology, Lund University, Skåne University Hospital Malmö, Sweden (S.Z., K.L., D.F., H.S.); Department of Thoracic Radiology, Imaging and Physiology and Department of Physiology and Pharmacology, Karolinska Hospital, Stockholm, Sweden (P.L.); Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care (N.M., D.E.) and Department of Oncology (D.E.), University of Cambridge, Cambridge, England; and Department of Oncology, Södersjukhuset, Stockholm, Sweden (P.H.)
| | - Kamila Czene
- From the Department of Medical Epidemiology and Biostatistics (M.E., K.C., P.H.) and Department of Oncology-Pathology (F.S.), Karolinska Institutet, Nobelsv 12A, Stockholm 171 77, Sweden; Department of Breast Radiology, Karolinska University Hospital, Stockholm, Sweden (F.S.); Department of Diagnostic Radiology, Lund University, Skåne University Hospital Malmö, Sweden (S.Z., K.L., D.F., H.S.); Department of Thoracic Radiology, Imaging and Physiology and Department of Physiology and Pharmacology, Karolinska Hospital, Stockholm, Sweden (P.L.); Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care (N.M., D.E.) and Department of Oncology (D.E.), University of Cambridge, Cambridge, England; and Department of Oncology, Södersjukhuset, Stockholm, Sweden (P.H.)
| | - Fredrik Strand
- From the Department of Medical Epidemiology and Biostatistics (M.E., K.C., P.H.) and Department of Oncology-Pathology (F.S.), Karolinska Institutet, Nobelsv 12A, Stockholm 171 77, Sweden; Department of Breast Radiology, Karolinska University Hospital, Stockholm, Sweden (F.S.); Department of Diagnostic Radiology, Lund University, Skåne University Hospital Malmö, Sweden (S.Z., K.L., D.F., H.S.); Department of Thoracic Radiology, Imaging and Physiology and Department of Physiology and Pharmacology, Karolinska Hospital, Stockholm, Sweden (P.L.); Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care (N.M., D.E.) and Department of Oncology (D.E.), University of Cambridge, Cambridge, England; and Department of Oncology, Södersjukhuset, Stockholm, Sweden (P.H.)
| | - Sophia Zackrisson
- From the Department of Medical Epidemiology and Biostatistics (M.E., K.C., P.H.) and Department of Oncology-Pathology (F.S.), Karolinska Institutet, Nobelsv 12A, Stockholm 171 77, Sweden; Department of Breast Radiology, Karolinska University Hospital, Stockholm, Sweden (F.S.); Department of Diagnostic Radiology, Lund University, Skåne University Hospital Malmö, Sweden (S.Z., K.L., D.F., H.S.); Department of Thoracic Radiology, Imaging and Physiology and Department of Physiology and Pharmacology, Karolinska Hospital, Stockholm, Sweden (P.L.); Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care (N.M., D.E.) and Department of Oncology (D.E.), University of Cambridge, Cambridge, England; and Department of Oncology, Södersjukhuset, Stockholm, Sweden (P.H.)
| | - Peter Lindholm
- From the Department of Medical Epidemiology and Biostatistics (M.E., K.C., P.H.) and Department of Oncology-Pathology (F.S.), Karolinska Institutet, Nobelsv 12A, Stockholm 171 77, Sweden; Department of Breast Radiology, Karolinska University Hospital, Stockholm, Sweden (F.S.); Department of Diagnostic Radiology, Lund University, Skåne University Hospital Malmö, Sweden (S.Z., K.L., D.F., H.S.); Department of Thoracic Radiology, Imaging and Physiology and Department of Physiology and Pharmacology, Karolinska Hospital, Stockholm, Sweden (P.L.); Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care (N.M., D.E.) and Department of Oncology (D.E.), University of Cambridge, Cambridge, England; and Department of Oncology, Södersjukhuset, Stockholm, Sweden (P.H.)
| | - Kristina Lång
- From the Department of Medical Epidemiology and Biostatistics (M.E., K.C., P.H.) and Department of Oncology-Pathology (F.S.), Karolinska Institutet, Nobelsv 12A, Stockholm 171 77, Sweden; Department of Breast Radiology, Karolinska University Hospital, Stockholm, Sweden (F.S.); Department of Diagnostic Radiology, Lund University, Skåne University Hospital Malmö, Sweden (S.Z., K.L., D.F., H.S.); Department of Thoracic Radiology, Imaging and Physiology and Department of Physiology and Pharmacology, Karolinska Hospital, Stockholm, Sweden (P.L.); Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care (N.M., D.E.) and Department of Oncology (D.E.), University of Cambridge, Cambridge, England; and Department of Oncology, Södersjukhuset, Stockholm, Sweden (P.H.)
| | - Daniel Förnvik
- From the Department of Medical Epidemiology and Biostatistics (M.E., K.C., P.H.) and Department of Oncology-Pathology (F.S.), Karolinska Institutet, Nobelsv 12A, Stockholm 171 77, Sweden; Department of Breast Radiology, Karolinska University Hospital, Stockholm, Sweden (F.S.); Department of Diagnostic Radiology, Lund University, Skåne University Hospital Malmö, Sweden (S.Z., K.L., D.F., H.S.); Department of Thoracic Radiology, Imaging and Physiology and Department of Physiology and Pharmacology, Karolinska Hospital, Stockholm, Sweden (P.L.); Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care (N.M., D.E.) and Department of Oncology (D.E.), University of Cambridge, Cambridge, England; and Department of Oncology, Södersjukhuset, Stockholm, Sweden (P.H.)
| | - Hanna Sartor
- From the Department of Medical Epidemiology and Biostatistics (M.E., K.C., P.H.) and Department of Oncology-Pathology (F.S.), Karolinska Institutet, Nobelsv 12A, Stockholm 171 77, Sweden; Department of Breast Radiology, Karolinska University Hospital, Stockholm, Sweden (F.S.); Department of Diagnostic Radiology, Lund University, Skåne University Hospital Malmö, Sweden (S.Z., K.L., D.F., H.S.); Department of Thoracic Radiology, Imaging and Physiology and Department of Physiology and Pharmacology, Karolinska Hospital, Stockholm, Sweden (P.L.); Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care (N.M., D.E.) and Department of Oncology (D.E.), University of Cambridge, Cambridge, England; and Department of Oncology, Södersjukhuset, Stockholm, Sweden (P.H.)
| | - Nasim Mavaddat
- From the Department of Medical Epidemiology and Biostatistics (M.E., K.C., P.H.) and Department of Oncology-Pathology (F.S.), Karolinska Institutet, Nobelsv 12A, Stockholm 171 77, Sweden; Department of Breast Radiology, Karolinska University Hospital, Stockholm, Sweden (F.S.); Department of Diagnostic Radiology, Lund University, Skåne University Hospital Malmö, Sweden (S.Z., K.L., D.F., H.S.); Department of Thoracic Radiology, Imaging and Physiology and Department of Physiology and Pharmacology, Karolinska Hospital, Stockholm, Sweden (P.L.); Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care (N.M., D.E.) and Department of Oncology (D.E.), University of Cambridge, Cambridge, England; and Department of Oncology, Södersjukhuset, Stockholm, Sweden (P.H.)
| | - Doug Easton
- From the Department of Medical Epidemiology and Biostatistics (M.E., K.C., P.H.) and Department of Oncology-Pathology (F.S.), Karolinska Institutet, Nobelsv 12A, Stockholm 171 77, Sweden; Department of Breast Radiology, Karolinska University Hospital, Stockholm, Sweden (F.S.); Department of Diagnostic Radiology, Lund University, Skåne University Hospital Malmö, Sweden (S.Z., K.L., D.F., H.S.); Department of Thoracic Radiology, Imaging and Physiology and Department of Physiology and Pharmacology, Karolinska Hospital, Stockholm, Sweden (P.L.); Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care (N.M., D.E.) and Department of Oncology (D.E.), University of Cambridge, Cambridge, England; and Department of Oncology, Södersjukhuset, Stockholm, Sweden (P.H.)
| | - Per Hall
- From the Department of Medical Epidemiology and Biostatistics (M.E., K.C., P.H.) and Department of Oncology-Pathology (F.S.), Karolinska Institutet, Nobelsv 12A, Stockholm 171 77, Sweden; Department of Breast Radiology, Karolinska University Hospital, Stockholm, Sweden (F.S.); Department of Diagnostic Radiology, Lund University, Skåne University Hospital Malmö, Sweden (S.Z., K.L., D.F., H.S.); Department of Thoracic Radiology, Imaging and Physiology and Department of Physiology and Pharmacology, Karolinska Hospital, Stockholm, Sweden (P.L.); Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care (N.M., D.E.) and Department of Oncology (D.E.), University of Cambridge, Cambridge, England; and Department of Oncology, Södersjukhuset, Stockholm, Sweden (P.H.)
| |
Collapse
|
30
|
Inferred genetic architecture underlying evolution in a fossil stickleback lineage. Nat Ecol Evol 2020; 4:1549-1557. [PMID: 32839544 DOI: 10.1038/s41559-020-01287-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 07/21/2020] [Indexed: 11/09/2022]
Abstract
Inferring the genetic architecture of evolution in the fossil record is difficult because genetic crosses are impossible, the acquisition of DNA is usually impossible and phenotype-genotype maps are rarely obvious. However, such inference is valuable because it reveals the genetic basis of microevolutionary change across many more generations than is possible in studies of extant taxa, thereby integrating microevolutionary process and macroevolutionary pattern. Here, we infer the genetic basis of pelvic skeleton reduction in Gasterosteus doryssus, a Miocene stickleback fish from a finely resolved stratigraphic sequence that spans nearly 17,000 years. Reduction in pelvic score, a categorical measure of pelvic structure, resulted primarily from reciprocal frequency changes of two discrete phenotypic classes. Pelvic vestiges also showed left-side larger asymmetry. These patterns implicate Pitx1, a large-effect gene whose deletion generates left-side larger asymmetry of pelvic vestiges in extant, closely related Gasterosteus aculeatus. In contrast, reductions in the length of the pelvic girdle and pelvic spines resulted from directional shifts of unimodal, continuous trait distributions, suggesting an additional suite of genes with minor, additive pelvic effects, again like G. aculeatus. Similar genetic architectures explain shared but phyletically independent patterns across 10 million years of stickleback evolution.
Collapse
|
31
|
Torres-Dowdall J, Rometsch SJ, Kautt AF, Aguilera G, Meyer A. The direction of genital asymmetry is expressed stochastically in internally fertilizing anablepid fishes. Proc Biol Sci 2020; 287:20200969. [PMID: 32635868 DOI: 10.1098/rspb.2020.0969] [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] [Indexed: 12/18/2022] Open
Abstract
Animal genitalia vary considerably across taxa, with divergence in many morphological traits, including striking departures from symmetry. Different mechanisms have been proposed to explain this diversity, mostly assuming that at least some of the phenotypic variation is heritable. However, heritability of the direction of genital asymmetry has been rarely determined. Anablepidae are internally fertilizing fish where the anal fin of males has been modified into an intromittent organ that transfers sperm into the gonopore of females. Males of anablepid fishes exhibit asymmetric genitalia, and both left- and right-sided individuals are commonly found at similar proportions within populations (i.e. antisymmetry). Although this polymorphism was described over a century ago, there have been no attempts to determine if genital asymmetry has a genetic basis and whether the different morphs are accumulating genetic differences, as might be expected since in some species females have also asymmetric gonopores and thereby can only be fertilized by compatible asymmetric males. We address this issue by combining breeding experiments with genome-wide data (ddRAD markers) in representative species of the two anablepid genera with asymmetric genitalia: Anableps and Jenynsia. Breeding experiments showed that all offspring were asymmetric, but their morphotype (i.e. right- or left-sided) was independent of parental morphotype, implying that the direction of asymmetry does not have a strong genetic component. Consistent with this conclusion, association analyses based on approximately 25 000 SNPs did not identify markers significantly associated with the direction of genital asymmetry and there was no evidence of population structure between left- and right-sided individuals. These results suggest that the direction of genital asymmetry in anablepid fishes might be stochastic, a commonly observed pattern in species with antisymmetry in morphological traits.
Collapse
Affiliation(s)
- Julián Torres-Dowdall
- Zoology and Evolutionary Biology, Department of Biology, University of Konstanz, 78457 Konstanz, Germany
| | - Sina J Rometsch
- Zoology and Evolutionary Biology, Department of Biology, University of Konstanz, 78457 Konstanz, Germany
| | - Andreas F Kautt
- Zoology and Evolutionary Biology, Department of Biology, University of Konstanz, 78457 Konstanz, Germany
| | - Gastón Aguilera
- Unidad Ejecutora Lillo (CONICET), Fundación Miguel Lillo, Tucumán, Argentina
| | - Axel Meyer
- Zoology and Evolutionary Biology, Department of Biology, University of Konstanz, 78457 Konstanz, Germany
| |
Collapse
|
32
|
Shen L, Denner F, Morgan N, van Wachem B, Dini D. Transient structures in rupturing thin films: Marangoni-induced symmetry-breaking pattern formation in viscous fluids. SCIENCE ADVANCES 2020; 6:eabb0597. [PMID: 32685679 PMCID: PMC7343401 DOI: 10.1126/sciadv.abb0597] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Accepted: 05/26/2020] [Indexed: 05/30/2023]
Abstract
In the minutes immediately preceding the rupture of a soap bubble, distinctive and repeatable patterns can be observed. These quasistable transient structures are associated with the instabilities of the complex Marangoni flows on the curved thin film in the presence of a surfactant solution. Here, we report a generalized Cahn-Hilliard-Swift-Hohenberg model derived using asymptotic theory that describes the quasielastic wrinkling pattern formation and the consequent coarsening dynamics in a curved surfactant-laden thin film. By testing the theory against experiments on soap bubbles, we find quantitative agreement with the analytical predictions of the nucleation and the early coarsening phases associated with the patterns. Our findings provide fundamental physical understanding that can be used to (de-)stabilize thin films in the presence of surfactants and have important implications for both natural and industrial contexts, such as the production of thin coating films, foams, emulsions, and sprays.
Collapse
Affiliation(s)
- Li Shen
- Department of Mechanical Engineering, Imperial College London, Exhibition Road, London SW7 2AZ, UK
| | - Fabian Denner
- Chair of Mechanical Process Engineering, Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106 Magdeburg, Germany
| | - Neal Morgan
- Shell Global Solutions Ltd., Shell Centre York Road, London SE1 7NA, UK
| | - Berend van Wachem
- Chair of Mechanical Process Engineering, Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106 Magdeburg, Germany
| | - Daniele Dini
- Department of Mechanical Engineering, Imperial College London, Exhibition Road, London SW7 2AZ, UK
| |
Collapse
|
33
|
Yang F, Qi J. miR-430a regulates the development of left-right asymmetry by targeting sqt in the teleost. Gene 2020; 745:144628. [PMID: 32224271 DOI: 10.1016/j.gene.2020.144628] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 03/24/2020] [Accepted: 03/25/2020] [Indexed: 10/24/2022]
Abstract
microRNAs (miRNAs) are short, endogenous non-coding RNAs that contain approximately 18-22 nucleotides. miRNAs are involved in gene regulation by recognizing and binding the 3'UTR of target gene. In our previous data, miR-430 family showed significant differential expression modes through metamorphosis in Japanese flounder. It was speculated that miR-430a plays a key role in left-right patterning. We predicted the targets of miR-430a and gene ontology (GO) was performed. We speculated miR-430a is involved in the basal molecular function and organ development. In Japanese flounder, sqt as a target of miR-430a was enriched into heart development term. Sqt has been reported to participate in mesendoderm formation and organ development. Cardiac morphogenesis is the first asymmetric development process, which breaks left-right symmetry in bilateria. It was used as a marker to detect L-R asymmetric effects of miR-430a. Overexpression and suppression of miR-430a resulted in abnormal KV (Kupffer's vesicles) development and disordered in nodal-related expression with consequent cardiac laterality. Squint mRNA of Japanese flounder (Posqt) as a target of miR-430a was overexpressed and caused similar phenotype with miR-430a suppression group, such as longer cilia in KV and high range of clmc2 and spaw ectopic expression. Moreover, rescue experiments were performed and suggested that cardiac and KV defections, induced by overexpressing miR-430a, could be rescued by injecting Posqt mRNA. These results suggested that miR-430a regulates the development of left-right asymmetry by targeting sqt in the teleost.
Collapse
Affiliation(s)
- Fan Yang
- MOE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Jie Qi
- MOE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, 5 Yushan Road, Qingdao 266003, China.
| |
Collapse
|
34
|
Swafford AJM, Oakley TH. Light-induced stress as a primary evolutionary driver of eye origins. Integr Comp Biol 2020; 59:739-750. [PMID: 31539028 DOI: 10.1093/icb/icz064] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Eyes are quintessential complex traits and our understanding of their evolution guides models of trait evolution in general. A long-standing account of eye evolution argues natural selection favors morphological variations that allow increased functionality for sensing light. While certainly true in part, this focus on visual performance does not entirely explain why diffuse photosensitivity persists even after eyes evolve, or why eyes evolved many times, each time using similar building blocks. Here, we briefly review a vast literature indicating most genetic components of eyes historically responded to stress caused directly by light, including ultraviolet damage of DNA, oxidative stress, and production of aldehydes. We propose light-induced stress had a direct and prominent role in the evolution of eyes by bringing together genes to repair and prevent damage from light-stress, both before and during the evolution of eyes themselves. Stress-repair and stress-prevention genes were perhaps originally deployed as plastic responses to light and/or as beneficial mutations genetically driving expression where light was prominent. These stress-response genes sense, shield, and refract light but only as reactions to ongoing light stress. Once under regulatory-genetic control, they could be expressed before light stress appeared, evolve as a module, and be influenced by natural selection to increase functionality for sensing light, ultimately leading to complex eyes and behaviors. Recognizing the potentially prominent role of stress in eye evolution invites discussions of plasticity and assimilation and provides a hypothesis for why similar genes are repeatedly used in convergent eyes. Broadening the drivers of eye evolution encourages consideration of multi-faceted mechanisms of plasticity/assimilation and mutation/selection for complex novelties and innovations in general.
Collapse
Affiliation(s)
- Andrew J M Swafford
- Ecology, Evolution, and Marine Biology Department, University of California Santa Barbara, Santa Barbara, CA 93106, USA
| | - Todd H Oakley
- Ecology, Evolution, and Marine Biology Department, University of California Santa Barbara, Santa Barbara, CA 93106, USA
| |
Collapse
|
35
|
Mechanics unlocks the morphogenetic puzzle of interlocking bivalved shells. Proc Natl Acad Sci U S A 2019; 117:43-51. [PMID: 31843921 DOI: 10.1073/pnas.1916520116] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Brachiopods and mollusks are 2 shell-bearing phyla that diverged from a common shell-less ancestor more than 540 million years ago. Brachiopods and bivalve mollusks have also convergently evolved a bivalved shell that displays an apparently mundane, yet striking feature from a developmental point of view: When the shell is closed, the 2 valve edges meet each other in a commissure that forms a continuum with no gaps or overlaps despite the fact that each valve, secreted by 2 mantle lobes, may present antisymmetric ornamental patterns of varying regularity and size. Interlocking is maintained throughout the entirety of development, even when the shell edge exhibits significant irregularity due to injury or other environmental influences, which suggests a dynamic physical process of pattern formation that cannot be genetically specified. Here, we derive a mathematical framework, based on the physics of shell growth, to explain how this interlocking pattern is created and regulated by mechanical instabilities. By close consideration of the geometry and mechanics of 2 lobes of the mantle, constrained both by the rigid shell that they secrete and by each other, we uncover the mechanistic basis for the interlocking pattern. Our modeling framework recovers and explains a large diversity of shell forms and highlights how parametric variations in the growth process result in morphological variation. Beyond the basic interlocking mechanism, we also consider the intricate and striking multiscale-patterned edge in certain brachiopods. We show that this pattern can be explained as a secondary instability that matches morphological trends and data.
Collapse
|
36
|
Pagès F, Fabre AC, Abourachid A. Does bone preparation impact its shape: consequences for comparative analyses of bone shape. PeerJ 2019; 7:e7932. [PMID: 31799066 PMCID: PMC6885353 DOI: 10.7717/peerj.7932] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 09/23/2019] [Indexed: 11/20/2022] Open
Abstract
Vertebrate osteological collections provide comparative material for morphological analysis. Before being stored in the collection and studied by researchers, specimens are treated by preparators or curators and are cleaned. The preparation protocol employed ideally should not damage the material. Here, we explore the potential deformation of bones due to preparation using geometric morphometric methods. We focus both on intraspecific and interspecific variability. Our data on the scapular girdle of birds show that, at an intraspecific level, the effect of preparation on bone shape cannot be neglected. Paired and unpaired bones did not respond to the preparation process in the same way, possibly due to differences in function and their anatomical characteristics. Moreover, deformations due to preparation can be estimated by looking at the texture of the bone. At the interspecific level, we found no significant differences as the deformations induced by preparation are relatively small compared to differences among species. This study highlights the importance of carefully selecting preparation methods in order to avoid physical damage that could impact the shape of bones, especially for studies at the intraspecific level.
Collapse
Affiliation(s)
- Fanny Pagès
- UMR 7179 C.N.R.S/M.N.H.N., Mécanismes adaptatifs et évolution (MECADEV), Muséum National d’Histoire Naturelle, Paris, France
| | | | - Anick Abourachid
- UMR 7179 C.N.R.S/M.N.H.N., Mécanismes adaptatifs et évolution (MECADEV), Muséum National d’Histoire Naturelle, Paris, France
| |
Collapse
|
37
|
Calhim S, Pruett-Jones S, Webster MS, Rowe M. Asymmetries in reproductive anatomy: insights from promiscuous songbirds. Biol J Linn Soc Lond 2019. [DOI: 10.1093/biolinnean/blz100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
Directional asymmetry in gonad size is commonly observed in vertebrates and is particularly pronounced in birds, where the left testis is frequently larger than the right. The adaptive significance of directional asymmetry in testis size is poorly understood, and whether it extends beyond the testes (i.e. side-correspondent asymmetry along the reproductive tract) has rarely been considered. Using the Maluridae, a songbird family exhibiting variation in levels of sperm competition and directional testis asymmetry, yet similar in ecology and life history, we investigated the relative roles of side-correspondence and sperm competition on male reproductive tract asymmetry at both inter- and intraspecific levels. We found some evidence for side-correspondent asymmetry. Additionally, sperm competition influenced directional asymmetry at each end of the reproductive tract: species experiencing higher levels of sperm competition had a relatively larger right testis and relatively more sperm in the right seminal glomerus. Within red-backed fairy-wrens (Malurus melanocephalus), auxiliary males had relatively more sperm in the left seminal glomerus, in contrast to a right-bias asymmetry throughout the reproductive tract in breeding males. Given that the number of sperm is important for competitive fertilization success, our results suggest that sperm competition shapes reproductive asymmetries beyond testis size, with likely functional consequences for male reproductive success.
Collapse
Affiliation(s)
- Sara Calhim
- Department of Biological and Environmental Science, University of Jyväskylä, FI, Finland
| | | | - Michael S Webster
- Cornell Laboratory of Ornithology, Cornell University, Ithaca, NY, USA
| | - Melissah Rowe
- Natural History Museum, University of Oslo, Oslo, Norway
- Centre for Ecological and Evolutionary Synthesis, Department of Biosciences, University of Oslo, Oslo, Norway
| |
Collapse
|
38
|
Berthaume MA, Bull AMJ. Human biological variation in sesamoid bone prevalence: the curious case of the fabella. J Anat 2019; 236:228-242. [PMID: 31623020 PMCID: PMC6956444 DOI: 10.1111/joa.13091] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/26/2019] [Indexed: 01/23/2023] Open
Abstract
The fabella is a sesamoid bone located in the gastrocnemius behind the lateral femoral condyle. In humans, fabellae are 3.5 times more common today than they were 100 years ago, with prevalence rates varying between and within populations. In particular, fabellae have been assumed to be more common in Asians than non‐Asians, equally common in men and women, potentially more common in older individuals, and bilateral cases (one per knee) appear to be more common than unilateral ones. The roles of genetic and environmental factors in this phenotypic variation have been hypothesized, but not rigorously investigated. Given its clinical and evolutionary significance (i.e. being associated with several knee ailments, causing medical issues on its own, interfering with medical devices, and being less common in humans than in other mammals), it is important comprehensively to understand prevalence rate variation, and the roles of genetics and environmental factors in that variation. To address these questions, we performed a meta‐analysis on data from studies published from 1875 to 2018 to investigate possible variation in sexual dimorphic (n = 22 studies, 7911 knees), ontogenetic (n = 10 studies, 4391 knees), and global (n = 65 studies, 21 626 knees) fabella prevalence rates. In addition, we investigated what proportion of cases are bilateral (n = 37 studies, 900 individuals), and among unilateral cases (n = 20 studies, 204 individuals), if fabellae are more common in the left or right knee. Our results show that, today, fabellae are 2.47–2.60% more common in men than women, and prevalence rates increase ontogenetically in old age (i.e. 70 years old), implying that fabellae can ossify early (i.e. 12 years old) or late in life. Approximately 72.94% of cases are bilateral, and among unilateral ones, fabellae are equally common in right and left knees. There is marked regional variation in fabella prevalence rates, with rates being highest in Asia, followed by Oceania, South America, Europe, Middle East, and North America, and lowest in Africa. Worldwide, an average of 36.80% of knees has ossified fabellae detectable by dissection. These results imply that, while the ability to form a fabella may be genetically controlled, the mechanisms that trigger fabella ossification may be environmentally controlled. What these environmental factors are, can only be speculated.
Collapse
Affiliation(s)
| | - Anthony M J Bull
- Department of Bioengineering, Imperial College London, London, UK
| |
Collapse
|
39
|
Shu S, Sigvardt ZMS, Chen X, Olesen J, Rogers DC, Sanoamuang LO. Lynceus amplopedia sp. nov., A New Laevicaudatan Clam Shrimp with Asymmetrically Modified Thoracopods from Yunnan, China (Crustacea: Branchiopoda). Zool Stud 2019; 58:e28. [PMID: 31966329 PMCID: PMC6917564 DOI: 10.6620/zs.2019.58-28] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2019] [Accepted: 07/26/2019] [Indexed: 11/18/2022]
Abstract
Laevicaudata has a nearly global distribution, but only a few records from China. We present a new Lynceus (Crustacea: Branchiopoda: Laevicaudata) species, Lynceus amplopedia sp. nov., from Yunnan, China, which shows significant left-right differences in some non-clasper thoracopods. It can be distinguished from all congeners by asymmetrically modified thoracopods III-VI. In the 'explanate modified' side (usually the left side, occasionally the right) the following modifications are present: endites 4, 5, and endopod enlarged (explanate) (thoracopods III and IV); exopod with 14-15 digitiform processes dorsomedially (thoracopods V and VI); and broad muscular basis (thoracopods III-V). The following modifications are seen in the thoracopods of the opposing 'spinose modified' side (usually the right side, occasionally the left): endite 4 with robust, specialized spines medially (thoracopods V and VI); endite 3 elongate protruding (thoracopod VI), and broad muscular basis (thoracopod V). Other unique characters of the new species include: male and female rostrum sinuate, compound eyes protruding, male claspers with endopod constricted, and endite 3 with two scale patches. We suggest the modified thoracopods may be involved in mating and/or respiration. The diversity of Chinese Lynceus is also discussed.
Collapse
Affiliation(s)
- Shusen Shu
- Applied Taxonomic Research Center, Department of Biology,
Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
- Southeast Asia Biodiversity Research Institute, Chinese
Academy of Sciences, Yezin, Nay Pyi Taw 05282, Myanmar
- Kunming Institute of Zoology, 650223, Chinese Academy of
Sciences, Kunming, China
| | - Zandra M. S. Sigvardt
- Natural History Museum of Denmark, University of
Copenhagen, Universitetsparken 15, DK-2100 Copenhagen Ø, Denmark
| | - Xiaoyong Chen
- Southeast Asia Biodiversity Research Institute, Chinese
Academy of Sciences, Yezin, Nay Pyi Taw 05282, Myanmar
- Kunming Institute of Zoology, 650223, Chinese Academy of
Sciences, Kunming, China
| | - Jørgen Olesen
- Natural History Museum of Denmark, University of
Copenhagen, Universitetsparken 15, DK-2100 Copenhagen Ø, Denmark
| | - D. Christopher Rogers
- Kansas Biological Survey and the Natural History Museum
(Biodiversity Institute), Kansas University, Kansas 66047-3759, USA.
| | - La-orsri Sanoamuang
- Applied Taxonomic Research Center, Department of Biology,
Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
- International College, Khon Kaen University, Khon Kaen
40002, Thailand.
| |
Collapse
|
40
|
A Comprehensive Network Atlas Reveals That Turing Patterns Are Common but Not Robust. Cell Syst 2019; 9:243-257.e4. [DOI: 10.1016/j.cels.2019.07.007] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 03/19/2019] [Accepted: 07/23/2019] [Indexed: 12/20/2022]
|
41
|
Speciation in Howea Palms Occurred in Sympatry, Was Preceded by Ancestral Admixture, and Was Associated with Edaphic and Phenological Adaptation. Mol Biol Evol 2019; 36:2682-2697. [DOI: 10.1093/molbev/msz166] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Abstract
Howea palms are viewed as one of the most clear-cut cases of speciation in sympatry. The sister species Howea belmoreana and H. forsteriana are endemic to the oceanic Lord Howe Island, Australia, where they have overlapping distributions and are reproductively isolated mainly by flowering time differences. However, the potential role of introgression from Australian mainland relatives had not previously been investigated, a process that has recently put other examples of sympatric speciation into question. Furthermore, the drivers of flowering time-based reproductive isolation remain unclear. We sequenced an RNA-seq data set that comprehensively sampled Howea and their closest mainland relatives (Linospadix, Laccospadix), and collected detailed soil chemistry data on Lord Howe Island to evaluate whether secondary gene flow had taken place and to examine the role of soil preference in speciation. D-statistics analyses strongly support a scenario whereby ancestral Howea hybridized frequently with its mainland relatives, but this only occurred prior to speciation. Expression analysis, population genetic and phylogenetic tests of selection, identified several flowering time genes with evidence of adaptive divergence between the Howea species. We found expression plasticity in flowering time genes in response to soil chemistry as well as adaptive expression and sequence divergence in genes pleiotropically linked to soil adaptation and flowering time. Ancestral hybridization may have provided the genetic diversity that promoted their subsequent adaptive divergence and speciation, a process that may be common for rapid ecological speciation.
Collapse
|
42
|
Torres-Dowdall J, Rometsch SJ, Aguilera G, Goyenola G, Meyer A. Asymmetry in genitalia is in sync with lateralized mating behavior but not with the lateralization of other behaviors. Curr Zool 2019; 66:71-81. [PMID: 32467707 PMCID: PMC7245012 DOI: 10.1093/cz/zoz019] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Accepted: 04/14/2019] [Indexed: 12/29/2022] Open
Abstract
Asymmetries in bilateral organisms attract a lot of curiosity given that they are conspicuous departures from the norm. They allow the investigation of the integration at different levels of biological organization. Here we study whether and how behavioral and asymmetrical anatomical traits co-evolved and work together. We ask if asymmetry is determined locally for each trait or at a whole individual level in a species bearing conspicuous asymmetrical genitalia. Asymmetric genitalia evolved in many species; however, in most cases the direction of asymmetry is fixed. Therefore, it has been rarely determined if there is an association between the direction of asymmetry in genitalia and other traits. In onesided livebearer fish of the genus Jenynsia (Cyprinodontiformes, Anablepidae), the anal fin of males is modified into a gonopodium, an intromittent organ that serves to inseminate females. The gonopodium shows a conspicuous asymmetry, with its tip bending either to the left or the right. By surveying 13 natural populations of Jenynsia lineata, we found that both genital morphs are equally common in wild populations. In a series of experiments in a laboratory population, we discovered asymmetry and lateralization for multiple other traits; yet, the degree of integration varied highly among them. Lateralization in exploratory behavior in response to different stimuli was not associated with genital morphology. Interestingly, the direction of genital asymmetry was positively correlated with sidedness of mating preference and the number of neuromasts in the lateral line. This suggests integration of functionally linked asymmetric traits; however, there is no evidence that asymmetry is determined at the whole individual level in our study species.
Collapse
Affiliation(s)
- Julián Torres-Dowdall
- Department of Biology, University of Konstanz, Konstanz, Germany.,Zukunftskolleg, University of Konstanz, Konstanz, Germany
| | - Sina J Rometsch
- Department of Biology, University of Konstanz, Konstanz, Germany.,Hector Fellow Academy, Karlsruhe, Germany
| | - Gastón Aguilera
- Unidad Ejecutora Lillo (CONICET), Fundación Miguel Lillo, Tucumán, Argentina
| | - Guillermo Goyenola
- Departamento de Ecología y Gestión Ambiental, Centro Universitario Regional Del Este, Universidad de la República, Uruguay
| | - Axel Meyer
- Department of Biology, University of Konstanz, Konstanz, Germany.,Hector Fellow Academy, Karlsruhe, Germany
| |
Collapse
|
43
|
|
44
|
Maxwell CS. Hypothesis: a Plastically Produced Phenotype Predicts Host Specialization and Can Precede Subsequent Mutations in Bacteriophage. mBio 2018; 9:e00765-18. [PMID: 30425142 PMCID: PMC6234872 DOI: 10.1128/mbio.00765-18] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Accepted: 10/04/2018] [Indexed: 01/24/2023] Open
Abstract
The role of phenotypic plasticity in the evolution of new traits is controversial due to a lack of direct evidence. Phage host range becomes plastic in the presence of restriction-modification (R-M) systems in their hosts. I modeled the evolution of phage host range in the presence of R-M systems. The model makes two main predictions. The first prediction is that the offspring of the first phage to gain a new methylation pattern by infecting a new host make up a disproportionate fraction of the subsequent specialist population, indicating that the plastically produced phenotype is highly predictive of evolutionary outcome. The second prediction is that the first phage to gain this pattern is not always genetically distinct from other phages in the population. Taken together, these results suggest that plasticity could play a causal role on par with mutation during the evolution of phage host range. This uniquely tractable system could enable the first direct test of "plasticity first" evolution.
Collapse
Affiliation(s)
- Colin S Maxwell
- Department of Biology, University of North Carolina, Chapel Hill, North Carolina, USA
| |
Collapse
|
45
|
Indermaur A, Theis A, Egger B, Salzburger W. Mouth dimorphism in scale‐eating cichlid fish from Lake Tanganyika advances individual fitness. Evolution 2018; 72:1962-1969. [DOI: 10.1111/evo.13552] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Accepted: 07/04/2018] [Indexed: 01/25/2023]
Affiliation(s)
- Adrian Indermaur
- Zoological Institute University of Basel Vesalgasse 1 4051 Basel Switzerland
| | - Anya Theis
- Zoological Institute University of Basel Vesalgasse 1 4051 Basel Switzerland
| | - Bernd Egger
- Zoological Institute University of Basel Vesalgasse 1 4051 Basel Switzerland
| | - Walter Salzburger
- Zoological Institute University of Basel Vesalgasse 1 4051 Basel Switzerland
| |
Collapse
|
46
|
Du G, Pei J, Jiang Z, Chen Q, Cao Z, Kuang Q, Xie Z, Zheng L. Origin of symmetry breaking in the seed-mediated growth of bi-metal nano-heterostructures. Sci Bull (Beijing) 2018; 63:892-899. [PMID: 36658970 DOI: 10.1016/j.scib.2018.05.035] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Revised: 05/25/2018] [Accepted: 05/28/2018] [Indexed: 01/21/2023]
Abstract
Seed-mediated growth is the most general way to controllably synthesize bimetal nano-heterostructures. Despite successful instances through trial and error were reported, the way for second metal depositing on the seed, namely whether the symmetry of resulted nano-heterostructure follows the original crystal symmetry of seed metal, remains an unpredictable issue to date. In this work, we propose that the thermodynamic factor, i.e., the difference of equilibrium electrochemical potentials (corresponding to their Fermi levels) of two metals in the growth solution, plays a key role for the symmetry breaking of bimetal nano-heterostructures during the seed-mediated growth. As a proof-of-principle experiment, by reversing the relative position of Fermi levels of the Pd nanocube seeds and the second metal Au with changing the concentration of reductant (L-ascorbic acid) in the growth solution, the structure of as-prepared products successfully evolved from centrosymmetric Pd@Au core-shell trisoctahedra to asymmetric Pd-Au hetero-dimers. The idea was further demonstrated by the growth of Ag on the Pd seeds. The present work intends to reveal the origin of symmetry breaking in the seed-mediated growth of nano-heterostructures from the viewpoint of thermodynamics, and these new insights will in turn help to achieve rational construction of bimetal nano-heterostructures with specific functions.
Collapse
Affiliation(s)
- Guifen Du
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Jun Pei
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Zhiyuan Jiang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Qiaoli Chen
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Zhenming Cao
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Qin Kuang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
| | - Zhaoxiong Xie
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China; Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361005, China.
| | - Lansun Zheng
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| |
Collapse
|
47
|
Raffini F, Fruciano C, Meyer A. Gene(s) and individual feeding behavior: Exploring eco-evolutionary dynamics underlying left-right asymmetry in the scale-eating cichlid fish Perissodus microlepis. Ecol Evol 2018; 8:5495-5507. [PMID: 29938068 PMCID: PMC6010907 DOI: 10.1002/ece3.4070] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2018] [Revised: 03/22/2018] [Accepted: 03/26/2018] [Indexed: 01/09/2023] Open
Abstract
The scale‐eating cichlid fish Perissodus microlepis is a textbook example of bilateral asymmetry due to its left or right‐bending heads and of negative frequency‐dependent selection, which is proposed to maintain this stable polymorphism. The mechanisms that underlie this asymmetry remain elusive. Several studies had initially postulated a simple genetic basis for this trait, but this explanation has been questioned, particularly by reports observing a unimodal distribution of mouth shapes. We hypothesize that this unimodal distribution might be due to a combination of genetic and phenotypically plastic components. Here, we expanded on previous work by investigating a formerly identified candidate SNP associated to mouth laterality, documenting inter‐individual variation in feeding preference using stable isotope analyses, and testing their association with mouth asymmetry. Our results suggest that this polymorphism is influenced by both a polygenic basis and inter‐individual non‐genetic variation, possibly due to feeding experience, individual specialization, and intraspecific competition. We introduce a hypothesis potentially explaining the simultaneous maintenance of left, right, asymmetric and symmetric mouth phenotypes due to the interaction between diverse eco‐evolutionary dynamics including niche construction and balancing selection. Future studies will have to further tease apart the relative contribution of genetic and environmental factors and their interactions in an integrated fashion.
Collapse
Affiliation(s)
- Francesca Raffini
- Lehrstuhl für Zoologie und Evolutionsbiologie Department of Biology University of Konstanz Konstanz Germany.,International Max Planck Research School (IMPRS) for Organismal Biology University of Konstanz Konstanz Germany
| | - Carmelo Fruciano
- Lehrstuhl für Zoologie und Evolutionsbiologie Department of Biology University of Konstanz Konstanz Germany.,School of Earth, Environmental & Biological Sciences Queensland University of Technology Brisbane QLD Australia.,Institut de biologie de l'Ecole normale supérieure (IBENS) Ecole normale supérieure, CNRS, INSERM PSL Université, Paris France
| | - Axel Meyer
- Lehrstuhl für Zoologie und Evolutionsbiologie Department of Biology University of Konstanz Konstanz Germany.,International Max Planck Research School (IMPRS) for Organismal Biology University of Konstanz Konstanz Germany.,Radcliffe Institute for Advanced Study Harvard University Cambridge Massachusetts
| |
Collapse
|
48
|
Castañer M, Andueza J, Hileno R, Puigarnau S, Prat Q, Camerino O. Profiles of Motor Laterality in Young Athletes' Performance of Complex Movements: Merging the MOTORLAT and PATHoops Tools. Front Psychol 2018; 9:916. [PMID: 29930527 PMCID: PMC5999755 DOI: 10.3389/fpsyg.2018.00916] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Accepted: 05/18/2018] [Indexed: 11/28/2022] Open
Abstract
Laterality is a key aspect of the analysis of basic and specific motor skills. It is relevant to sports because it involves motor laterality profiles beyond left-right preference and spatial orientation of the body. The aim of this study was to obtain the laterality profiles of young athletes, taking into account the synergies between the support and precision functions of limbs and body parts in the performance of complex motor skills. We applied two instruments: (a) MOTORLAT, a motor laterality inventory comprising 30 items of basic, specific, and combined motor skills, and (b) the Precision and Agility Tapping over Hoops (PATHoops) task, in which participants had to perform a path by stepping in each of 14 hoops arranged on the floor, allowing the observation of their feet, left-right preference and spatial orientation. A total of 96 young athletes performed the PATHoops task and the 30 MOTORLAT items, allowing us to obtain data about limb dominance and spatial orientation of the body in the performance of complex motor skills. Laterality profiles were obtained by means of a cluster analysis and a correlational analysis and a contingency analysis were applied between the motor skills and spatial orientation actions performed. The results obtained using MOTORLAT show that the combined motor skills criterion (for example, turning while jumping) differentiates athletes' uses of laterality, showing a clear tendency toward mixed laterality profiles in the performance of complex movements. In the PATHoops task, the best spatial orientation strategy was “same way” (same foot and spatial wing) followed by “opposite way” (opposite foot and spatial wing), in keeping with the research assumption that actions unfolding in a horizontal direction in front of an observer's eyes are common in a variety of sports.
Collapse
Affiliation(s)
- Marta Castañer
- National Institute of Physical Education of Catalonia (INEFC), University of Lleida, Lleida, Spain.,Lleida Institute for Biomedical Research Dr. Pifarré Foundation (IRBLLEIDA), University of Lleida, Lleida, Spain
| | - Juan Andueza
- National Institute of Physical Education of Catalonia (INEFC), University of Lleida, Lleida, Spain
| | - Raúl Hileno
- National Institute of Physical Education of Catalonia (INEFC), University of Lleida, Lleida, Spain
| | - Silvia Puigarnau
- National Institute of Physical Education of Catalonia (INEFC), University of Lleida, Lleida, Spain
| | - Queralt Prat
- National Institute of Physical Education of Catalonia (INEFC), University of Lleida, Lleida, Spain
| | - Oleguer Camerino
- National Institute of Physical Education of Catalonia (INEFC), University of Lleida, Lleida, Spain.,Lleida Institute for Biomedical Research Dr. Pifarré Foundation (IRBLLEIDA), University of Lleida, Lleida, Spain
| |
Collapse
|
49
|
Hallgrimsson B, Green RM, Katz DC, Fish JL, Bernier FP, Roseman CC, Young NM, Cheverud JM, Marcucio RS. The developmental-genetics of canalization. Semin Cell Dev Biol 2018; 88:67-79. [PMID: 29782925 DOI: 10.1016/j.semcdb.2018.05.019] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Revised: 05/16/2018] [Accepted: 05/17/2018] [Indexed: 10/16/2022]
Abstract
Canalization, or robustness to genetic or environmental perturbations, is fundamental to complex organisms. While there is strong evidence for canalization as an evolved property that varies among genotypes, the developmental and genetic mechanisms that produce this phenomenon are very poorly understood. For evolutionary biology, understanding how canalization arises is important because, by modulating the phenotypic variation that arises in response to genetic differences, canalization is a determinant of evolvability. For genetics of disease in humans and for economically important traits in agriculture, this subject is important because canalization is a potentially significant cause of missing heritability that confounds genomic prediction of phenotypes. We review the major lines of thought on the developmental-genetic basis for canalization. These fall into two groups. One proposes specific evolved molecular mechanisms while the other deals with robustness or canalization as a more general feature of development. These explanations for canalization are not mutually exclusive and they overlap in several ways. General explanations for canalization are more likely to involve emergent features of development than specific molecular mechanisms. Disentangling these explanations is also complicated by differences in perspectives between genetics and developmental biology. Understanding canalization at a mechanistic level will require conceptual and methodological approaches that integrate quantitative genetics and developmental biology.
Collapse
Affiliation(s)
- Benedikt Hallgrimsson
- Dept. of Cell Biology & Anatomy, Alberta Children's Hospital Research Institute and McCaig Bone and Joint Institute, Cumming School of Medicine, University of Calgary, Calgary, AB, T2N 4N1, Canada.
| | - Rebecca M Green
- Dept. of Cell Biology & Anatomy, Alberta Children's Hospital Research Institute and McCaig Bone and Joint Institute, Cumming School of Medicine, University of Calgary, Calgary, AB, T2N 4N1, Canada
| | - David C Katz
- Dept. of Cell Biology & Anatomy, Alberta Children's Hospital Research Institute and McCaig Bone and Joint Institute, Cumming School of Medicine, University of Calgary, Calgary, AB, T2N 4N1, Canada
| | - Jennifer L Fish
- Dept. of Biological Sciences, University of Massachusetts Lowell, Lowell, MA, 01854, USA
| | - Francois P Bernier
- Dept of Medical Genetics, Alberta Children's Hospital Research Institute Cumming School of Medicine, University of Calgary, Calgary, AB, T2N 4N1, Canada
| | - Charles C Roseman
- Dept. of Animal Biology, University of Illinois Urbana Champaign, Urbana, IL, 61801, USA
| | - Nathan M Young
- Dept. of Orthopaedic Surgery, School of Medicine, University of California San Francisco, San Francisco, CA, 94110, USA
| | - James M Cheverud
- Dept. of Biology, Loyola University Chicago, Chicago, IL, 60660, USA
| | - Ralph S Marcucio
- Dept. of Orthopaedic Surgery, School of Medicine, University of California San Francisco, San Francisco, CA, 94110, USA.
| |
Collapse
|
50
|
|