1
|
Fliniaux I, Marchand G, Molinaro C, Decloquement M, Martoriati A, Marin M, Bodart JF, Harduin-Lepers A, Cailliau K. Diversity of sialic acids and sialoglycoproteins in gametes and at fertilization. Front Cell Dev Biol 2022; 10:982931. [PMID: 36340022 PMCID: PMC9630641 DOI: 10.3389/fcell.2022.982931] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 10/10/2022] [Indexed: 09/22/2023] Open
Abstract
Sialic acids are a family of 9-carbon monosaccharides with particular physicochemical properties. They modulate the biological functions of the molecules that carry them and are involved in several steps of the reproductive process. Sialoglycoproteins participate in the balance between species recognition and specificity, and the mechanisms of these aspects remain an issue in gametes formation and binding in metazoan reproduction. Sialoglycoproteins form a specific coat at the gametes surface and specific polysialylated chains are present on marine species oocytes. Spermatozoa are submitted to critical sialic acid changes in the female reproductive tract facilitating their migration, their survival through the modulation of the female innate immune response, and the final oocyte-binding event. To decipher the role of sialic acids in gametes and at fertilization, the dynamical changes of enzymes involved in their synthesis and removal have to be further considered.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | | | - Katia Cailliau
- Univ. Lille, CNRS, UMR 8576-UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, Lille, France
| |
Collapse
|
2
|
Mechanisms of Sperm–Egg Interactions: What Ascidian Fertilization Research Has Taught Us. Cells 2022; 11:cells11132096. [PMID: 35805180 PMCID: PMC9265791 DOI: 10.3390/cells11132096] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Revised: 06/18/2022] [Accepted: 06/28/2022] [Indexed: 02/01/2023] Open
Abstract
Fertilization is an essential process in terrestrial organisms for creating a new organism with genetic diversity. Before gamete fusion, several steps are required to achieve successful fertilization. Animal spermatozoa are first activated and attracted to the eggs by egg-derived chemoattractants. During the sperm passage of the egg’s extracellular matrix or upon the sperm binding to the proteinaceous egg coat, the sperm undergoes an acrosome reaction, an exocytosis of acrosome. In hermaphrodites such as ascidians, the self/nonself recognition process occurs when the sperm binds to the egg coat. The activated or acrosome-reacted spermatozoa penetrate through the proteinaceous egg coat. The extracellular ubiquitin–proteasome system, the astacin-like metalloproteases, and the trypsin-like proteases play key roles in this process in ascidians. In the present review, we summarize our current understanding and perspectives on gamete recognition and egg coat lysins in ascidians and consider the general mechanisms of fertilization in animals and plants.
Collapse
|
3
|
Saito T, Sawada H. Fertilization of Ascidians: Gamete Interaction, Self/Nonself Recognition and Sperm Penetration of Egg Coat. Front Cell Dev Biol 2022; 9:827214. [PMID: 35186958 PMCID: PMC8849226 DOI: 10.3389/fcell.2021.827214] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 12/30/2021] [Indexed: 12/22/2022] Open
Abstract
Fertilization is one of the most important events in living organisms to generate a new life with a mixed genetic background. To achieve successful fertilization, sperm and eggs must undergo complex processes in a sequential order. Fertilization of marine invertebrate Ciona intestinalis type A (Ciona robusta) has been studied for more than a hundred years. Ascidian sperm are attracted by chemoattractants from eggs and bind to the vitelline coat. Subsequently, sperm penetrate through the vitelline coat proteolytically and finally fuse with the egg plasma membrane. Here, we summarize the fertilization mechanisms of ascidians, particularly from sperm-egg interactions to sperm penetration of the egg coat. Since ascidians are hermaphrodites, inbreeding depression is a serious problem. To avoid self-fertilization, ascidians possess a self-incompatibility system. In this review, we also describe the molecular mechanisms of the self-incompatibility system in C. intestinalis type A governed by three allelic gene pairs of s-Themis and v-Themis.
Collapse
Affiliation(s)
- Takako Saito
- Faculty of Agriculture Department of Applied Life Sciences, Shizuoka University, Shizuoka, Japan
| | - Hitoshi Sawada
- Depatment of Food and Nutritional Environment, College of Human Life and Environment, Kinjo Gakuin University, Nagoya, Japan
- Graduate School of Science, Nagoya University, Nagoya, Japan
- *Correspondence: Hitoshi Sawada,
| |
Collapse
|
4
|
Mannosylated glycoconjugates on the surface of activated sperm in the giant freshwater prawn are crucial for sperm binding with the egg vitelline envelop. Cell Tissue Res 2021; 384:179-193. [PMID: 33427951 DOI: 10.1007/s00441-020-03324-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 10/12/2020] [Indexed: 10/22/2022]
Abstract
The unusual morphology and poorly defined acrosome-like structure in the mature sperm of the giant freshwater prawn Macrobrachium rosenbergii has led to difficulties in identifying the state of sperm activation. Mature distal vas deferens sperm (dVSp) can be activated by the calcium ionophore A23187 to show acrosome reaction-like enzymatic activities that increase their binding and penetration capabilities. However, these short-lived enzymatic activities limit their usefulness as a marker of sperm activation for further qualitative and quantitative analyses, leading to our examining the alterations in the exposure of sperm surface glycoconjugates both as markers of sperm activation and for their role in gamete interaction. Our results showed that after A23187 treatment, there was an increased exposure of mannosylated glycoconjugates on the sperm surface revealed by significant Concanavalin A (Con A) staining. Furthermore, sodium metaperiodate pre-treatment, Con A pre-incubation, or co-incubation with α-mannose monosaccharides all significantly reduced A23187-induced dVSp binding to the egg vitelline envelop, demonstrating the importance of sperm surface mannosylated glycoconjugates in the binding process. These same pre-treatments of sperm also resulted in the inhibition of the binding of soluble vitelline envelop proteins (MrVE) to both the sperm surface and to mannosylated dVSp protein bands. Therefore, the present study demonstrated the importance of the exposure of mannosylated glycoconjugates on the surface of activated dVSp, both as a reliable marker of sperm activation and as a binding factor in the gamete interaction process. Furthermore, these findings allow for a better understanding of the surface glycoconjugate-mediated interaction process between gametes in this species of prawn.
Collapse
|
5
|
New Records of Sand Crabs (Crustacea: Decapoda: Albuneidae and Blepharipodidae) from the Western Pacific with Description of Two New Species of Paralbunea Serène, 1977. Zool Stud 2020; 59:e15. [PMID: 33262839 DOI: 10.6620/zs.2020.59-15] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Accepted: 04/08/2020] [Indexed: 11/18/2022]
Abstract
Two new species belonging to the sand crab genus Paralbunea Serène, 1977 are described: one each from the Philippines and Taiwan. Both new species can be distinguished from each other, as well as the five other species of Paralbunea, by characters of the carapace, eyes, and pereopods. Additional new western Pacific locality records are given for two species of spiny sand crabs (Blepharipodidae) and six species of sand crabs (Albuneidae). A key to all seven species of Paralbunea is provided.
Collapse
|
6
|
González A, Fernandino JI, Elisio M, Chalde T, Miranda LA, Hammond GL, Somoza GM. Sex hormone binding globulin during an annual reproductive cycle in the hepatopancreas and ovary of pejerrey (Odontesthes bonariensis). Gen Comp Endocrinol 2019; 272:52-56. [PMID: 30465767 DOI: 10.1016/j.ygcen.2018.11.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Revised: 11/15/2018] [Accepted: 11/17/2018] [Indexed: 10/27/2022]
Abstract
In the present study, we determined the hepatopancratic shbg transcript abundance and ovarian immunoreactive Shbg (ir-Shbg) localization in pejerrey females at different gonadal stages during an annual ovarian cycle. In the hepatopancreas, shbg expression remains was constant in pre-vitellogenic stages, decreased at final vitellogenesis to increase again in final maturation and atretic stages to previous levels at post-vitellogenic stages. Related to this, also we found a negative significant relation between sex steroid and shbg expression. On the other hand, in the ovary we found ir-Shbg inside of cortical alveoli, from previtellogenic stages to final maturation. This localization of Shbg in a teleost fish ovary suggests a new role for Shbg in oocytes, that may also extend the oocyte fertilization/development process.
Collapse
Affiliation(s)
- Anelisa González
- Instituto de Investigaciones Biotecnológicas-Instituto Tecnológico de Chascomús "Dr. Raúl Alfonsín" (CONICET-UNSAM), Chascomús, Buenos Aires, Argentina
| | - Juan I Fernandino
- Instituto de Investigaciones Biotecnológicas-Instituto Tecnológico de Chascomús "Dr. Raúl Alfonsín" (CONICET-UNSAM), Chascomús, Buenos Aires, Argentina
| | - Mariano Elisio
- Instituto de Investigaciones Biotecnológicas-Instituto Tecnológico de Chascomús "Dr. Raúl Alfonsín" (CONICET-UNSAM), Chascomús, Buenos Aires, Argentina
| | - Tomás Chalde
- Instituto de Investigaciones Biotecnológicas-Instituto Tecnológico de Chascomús "Dr. Raúl Alfonsín" (CONICET-UNSAM), Chascomús, Buenos Aires, Argentina
| | - Leandro A Miranda
- Instituto de Investigaciones Biotecnológicas-Instituto Tecnológico de Chascomús "Dr. Raúl Alfonsín" (CONICET-UNSAM), Chascomús, Buenos Aires, Argentina
| | - Geoffrey L Hammond
- Department of Cellular and Physiological Sciences, Faculty of Medicine, The University of British Columbia, British Columbia, Canada
| | - Gustavo M Somoza
- Instituto de Investigaciones Biotecnológicas-Instituto Tecnológico de Chascomús "Dr. Raúl Alfonsín" (CONICET-UNSAM), Chascomús, Buenos Aires, Argentina.
| |
Collapse
|
7
|
Raj I, Sadat Al Hosseini H, Dioguardi E, Nishimura K, Han L, Villa A, de Sanctis D, Jovine L. Structural Basis of Egg Coat-Sperm Recognition at Fertilization. Cell 2017. [PMID: 28622512 PMCID: PMC5480393 DOI: 10.1016/j.cell.2017.05.033] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Recognition between sperm and the egg surface marks the beginning of life in all sexually reproducing organisms. This fundamental biological event depends on the species-specific interaction between rapidly evolving counterpart molecules on the gametes. We report biochemical, crystallographic, and mutational studies of domain repeats 1–3 of invertebrate egg coat protein VERL and their interaction with cognate sperm protein lysin. VERL repeats fold like the functionally essential N-terminal repeat of mammalian sperm receptor ZP2, whose structure is also described here. Whereas sequence-divergent repeat 1 does not bind lysin, repeat 3 binds it non-species specifically via a high-affinity, largely hydrophobic interface. Due to its intermediate binding affinity, repeat 2 selectively interacts with lysin from the same species. Exposure of a highly positively charged surface of VERL-bound lysin suggests that complex formation both disrupts the organization of egg coat filaments and triggers their electrostatic repulsion, thereby opening a hole for sperm penetration and fusion. Sperm-binding repeats of mollusk VERL and mouse ZP2 egg coat proteins fold similarly Structures of VERL/lysin complexes reveal the atomic basis of egg coat-sperm recognition A medium-affinity VERL repeat selectively binds lysin from the same species VERL/lysin recognition suggests a mechanism for sperm penetration through the egg coat
Collapse
Affiliation(s)
- Isha Raj
- Department of Biosciences and Nutrition and Center for Innovative Medicine, Karolinska Institutet, Huddinge, SE-141 83, Sweden
| | - Hamed Sadat Al Hosseini
- Department of Biosciences and Nutrition and Center for Innovative Medicine, Karolinska Institutet, Huddinge, SE-141 83, Sweden
| | - Elisa Dioguardi
- Department of Biosciences and Nutrition and Center for Innovative Medicine, Karolinska Institutet, Huddinge, SE-141 83, Sweden
| | - Kaoru Nishimura
- Department of Biosciences and Nutrition and Center for Innovative Medicine, Karolinska Institutet, Huddinge, SE-141 83, Sweden
| | - Ling Han
- Department of Biosciences and Nutrition and Center for Innovative Medicine, Karolinska Institutet, Huddinge, SE-141 83, Sweden
| | - Alessandra Villa
- Department of Biosciences and Nutrition and Center for Innovative Medicine, Karolinska Institutet, Huddinge, SE-141 83, Sweden
| | - Daniele de Sanctis
- ESRF - The European Synchrotron Radiation Facility, Grenoble 38000, France
| | - Luca Jovine
- Department of Biosciences and Nutrition and Center for Innovative Medicine, Karolinska Institutet, Huddinge, SE-141 83, Sweden.
| |
Collapse
|
8
|
De novo sequencing and comparative analysis of testicular transcriptome from different reproductive phases in freshwater spotted snakehead Channa punctatus. PLoS One 2017; 12:e0173178. [PMID: 28253373 PMCID: PMC5333912 DOI: 10.1371/journal.pone.0173178] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Accepted: 02/16/2017] [Indexed: 12/14/2022] Open
Abstract
The spotted snakehead Channa punctatus is a seasonally breeding teleost widely distributed in the Indian subcontinent and economically important due to high nutritional value. The declining population of C. punctatus prompted us to focus on genetic regulation of its reproduction. The present study carried out de novo testicular transcriptome sequencing during the four reproductive phases and correlated differential expression of transcripts with various testicular events in C. punctatus. The Illumina paired-end sequencing of testicular transcriptome from resting, preparatory, spawning and postspawning phases generated 41.94, 47.51, 61.81 and 44.45 million reads, and 105526, 105169, 122964 and 106544 transcripts, respectively. Transcripts annotated using Rattus norvegicus reference protein sequences and classified under various subcategories of biological process, molecular function and cellular component showed that the majority of the subcategories had highest number of transcripts during spawning phase. In addition, analysis of transcripts exhibiting differential expression during the four phases revealed an appreciable increase in upregulated transcripts of biological processes such as cell proliferation and differentiation, cytoskeleton organization, response to vitamin A, transcription and translation, regulation of angiogenesis and response to hypoxia during spermatogenically active phases. The study also identified significant differential expression of transcripts relevant to spermatogenesis (mgat3, nqo1, hes2, rgs4, cxcl2, alcam, agmat), steroidogenesis (star, tkt, gipc3), cell proliferation (eef1a2, btg3, pif1, myo16, grik3, trim39, plbd1), cytoskeletal organization (espn, wipf3, cd276), sperm development (klhl10, mast1, hspa1a, slc6a1, ros1, foxj1, hipk1), and sperm transport and motility (hint1, muc13). Analysis of functional annotation and differential expression of testicular transcripts depending on reproductive phases of C. punctatus helped in developing a comprehensive understanding on genetic regulation of spermatogenic and steroidogenic events in seasonally breeding teleosts. Our findings provide the basis for future investigation on the precise role of testicular genes in regulation of seasonal reproduction in male teleosts.
Collapse
|
9
|
Cohen S, Petcoff G, Freijo RO, Portiansky EL, Barbeito CG, Macchi GJ, Díaz AO. Histochemical Characterization of Oocytes in the Pink Cuskeel (Genypterus blacodes). Zoolog Sci 2015; 32:383-8. [PMID: 26245226 DOI: 10.2108/zs140235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In the present study we histochemically and lectinhistochemically characterized the growing oocytes of the pink cuskeel (Genypterus blacodes). We used histochemical methods for the localization and characterization of glycoconjugates (GCs) and lectin histochemical techniques for the identification of specific sugar residues. We analyzed presence and distribution of GCs in the different structures of the growing follicles (cortical alveoli, globules, yolk granules and zona radiata). During the initial stage of vitellogenesis, the oocytes presented small yolk granules composed of GCs that gradually increased during exogenous vitellogenesis. These GCs contained moderate quantities of α-D-mannose, D-glucose, N-acetylglucosamine and N-acetyl-neuraminic acid. The cortical alveoli contained both neutral and carboxylated GCs, and lectin techniques detected N-acetylgalactosamine, galactose and L-fucose. The zona radiata showed a strong positive reaction to PAS and it reacted weakly with more specific techniques, such as KOH/PA*S and PA/Bh/KOH/PAS. This structure showed GCs with oxidizable vicinal diols, O-acyl sugars and sialic acid residues with different substitution types and presented N-acetylgalactosamine and L-fucose specific residues. The oocytes follicular envelope evidenced neutral and acidic non-sulfated GCs and high concentrations of α-D-mannose, D-glucose, galactose and N-acetylgalactosamine. The intergranular cytoplasmic GCs were mainly rich in α-D-mannose, D-glucose, N-acetylgalactosamine, N-acetylglucosamine and N-acetyl-neuraminic acid. These results enhance the comprehension of the structure and functionality of the pink cuskeel ovarian follicles, and provide a useful tool for the study of this tissue in other teleost species.
Collapse
Affiliation(s)
- Stefanía Cohen
- 1 Instituto de Investigaciones Marinas y Costeras (IIMyC), FCEyN, CONICET- Universidad Nacional de Mar del Plata. Funes 3250. (7600) Mar del Plata, Argentina.,2 Consejo Nacional de Investigaciones Científicas y Técnicas (Conicet), Argentina
| | - Gladys Petcoff
- 3 Departamento de Biología. Facultad de Ciencias Exactas y Naturales. Universidad Nacional de Mar del Plata
| | - Roberto O Freijo
- 3 Departamento de Biología. Facultad de Ciencias Exactas y Naturales. Universidad Nacional de Mar del Plata
| | - Enrique L Portiansky
- 2 Consejo Nacional de Investigaciones Científicas y Técnicas (Conicet), Argentina.,4 Departamento de Histología y Embriología, Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata (UNLP), 60 y 118, (1900) La Plata, Argentina
| | - Claudio G Barbeito
- 2 Consejo Nacional de Investigaciones Científicas y Técnicas (Conicet), Argentina.,5 Instituto de Patología, Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata (UNLP), 60 y 118, (1900) La Plata, Buenos Aires, Argentina
| | - Gustavo J Macchi
- 1 Instituto de Investigaciones Marinas y Costeras (IIMyC), FCEyN, CONICET- Universidad Nacional de Mar del Plata. Funes 3250. (7600) Mar del Plata, Argentina.,2 Consejo Nacional de Investigaciones Científicas y Técnicas (Conicet), Argentina.,6 Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP), Paseo Victoria Ocampo 1, Mar del Plata, General Pueyrredón (7600), Buenos Aires, Argentina
| | - Alcira O Díaz
- 1 Instituto de Investigaciones Marinas y Costeras (IIMyC), FCEyN, CONICET- Universidad Nacional de Mar del Plata. Funes 3250. (7600) Mar del Plata, Argentina
| |
Collapse
|
10
|
Shu L, Suter MJF, Räsänen K. Evolution of egg coats: linking molecular biology and ecology. Mol Ecol 2015; 24:4052-73. [DOI: 10.1111/mec.13283] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Revised: 06/12/2015] [Accepted: 06/17/2015] [Indexed: 12/18/2022]
Affiliation(s)
- Longfei Shu
- Department of Aquatic Ecology; Swiss Federal Institute of Aquatic Science and Technology; Eawag; 8600 Duebendorf Switzerland
- Institute of Integrative Biology; ETH Zurich; 8092 Zurich Switzerland
| | - Marc J.-F. Suter
- Department of Environmental Toxicology; Swiss Federal Institute of Aquatic Science and Technology; Eawag; 8600 Duebendorf Switzerland
- Department of Environmental Systems Science; Swiss Federal Institute of Technology; ETH Zurich; 8092 Zurich Switzerland
| | - Katja Räsänen
- Department of Aquatic Ecology; Swiss Federal Institute of Aquatic Science and Technology; Eawag; 8600 Duebendorf Switzerland
- Institute of Integrative Biology; ETH Zurich; 8092 Zurich Switzerland
| |
Collapse
|
11
|
Honorato-Sampaio K, Prado PS, Sato Y, Bazzoli N, Rizzo E. Comparative morphology of the oocyte surface and early development in four characiformes from the São Francisco River, Brazil. J Morphol 2015; 276:1258-72. [DOI: 10.1002/jmor.20416] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Revised: 05/24/2015] [Accepted: 06/12/2015] [Indexed: 11/05/2022]
Affiliation(s)
- Kinulpe Honorato-Sampaio
- Departamento De Morfologia; Instituto De Ciências Biológicas, Universidade Federal De Minas Gerais, UFMG; Belo Horizonte Minas Gerais Brasil
| | - Paula Suzanna Prado
- Departamento De Morfologia; Instituto De Ciências Biológicas, Universidade Federal De Minas Gerais, UFMG; Belo Horizonte Minas Gerais Brasil
| | - Yoshimi Sato
- Estação De Hidrobiologia E Piscicultura De Três Marias, Companhia De Desenvolvimento Dos Vales Do São Francisco E Parnaíba CODEVASF; Três Marias Minas Gerais Brasil
| | - Nilo Bazzoli
- Departamento De Morfologia; Instituto De Ciências Biológicas, Universidade Federal De Minas Gerais, UFMG; Belo Horizonte Minas Gerais Brasil
- Programa De Pós-Graduação Em Zoologia De Vertebrados, Pontifícia Universidade Católica De Minas Gerais, PUC Minas; Belo Horizonte Minas Gerais Brasil
| | - Elizete Rizzo
- Departamento De Morfologia; Instituto De Ciências Biológicas, Universidade Federal De Minas Gerais, UFMG; Belo Horizonte Minas Gerais Brasil
| |
Collapse
|
12
|
Effects of salinity and sea salt type on egg activation, fertilization, buoyancy and early embryology of European eel, Anguilla anguilla. ZYGOTE 2015; 24:121-38. [DOI: 10.1017/s0967199414000811] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
SummaryImproper activation and swelling of in vitro produced eggs of European eel, Anguilla anguilla, has been shown to negatively affect embryonic development and hatching. We investigated this phenomenon by examining the effects of salinity and sea salt type on egg dimensions, cell cleavage patterns and egg buoyancy. Egg diameter after activation, using natural seawater adjusted to different salinities, varied among female eels, but no consistent pattern emerged. Activation salinities between 30–40 practical salinity unit (psu) produced higher quality eggs and generally larger egg diameters. Chorion diameters reached maximal values of 1642 ± 8 μm at 35 psu. A positive relationship was found between egg neutral buoyancy and activation salinity. Nine salt types were investigated as activation and incubation media. Five of these types induced a substantial perivitelline space (PVS), leading to large egg sizes, while the remaining four salt types resulted in smaller eggs. All salt types except NaCl treatments led to high fertilization rates and had no effect on fertilization success as well as egg neutral buoyancies at 7 h post-fertilization. The study points to the importance of considering ionic composition of the media when rearing fish eggs and further studies are encouraged.
Collapse
|
13
|
Lahiri R, Palanivel A, Kulkarni SA, Vankar YD. Synthesis of Isofagomine–Pyrrolidine Hybrid Sugars and Analogues of (−)-Steviamine and (+)-Hyacinthacine C5 Using 1,3-Dipolar Cycloaddition Reactions. J Org Chem 2014; 79:10786-800. [DOI: 10.1021/jo5016745] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rima Lahiri
- Department
of Chemistry, Indian Institute of Technology Kanpur Kanpur 208016, India
| | - Ashokkumar Palanivel
- Department
of Chemistry, Indian Institute of Technology Kanpur Kanpur 208016, India
| | - Sudhir A. Kulkarni
- VLife Sciences Technologies Pvt. Ltd., second
Floor Anaahat, Plot No. 5, Ram Indu Park, Baner Road, Pune 411045, India
| | - Yashwant D. Vankar
- Department
of Chemistry, Indian Institute of Technology Kanpur Kanpur 208016, India
| |
Collapse
|
14
|
Lahiri R, Suman Reddy Y, Kulkarni SA, Vankar YD. Synthesis of unnatural indolizidines, pyrrolizidine and C-alkyl iminosugars from sugar derived hemiaminals. RSC Adv 2013. [DOI: 10.1039/c3ra43510e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
|