1
|
Characteristics of bull sperm acrosome associated 1 proteins. Anim Reprod Sci 2020; 218:106479. [PMID: 32507260 DOI: 10.1016/j.anireprosci.2020.106479] [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: 10/23/2019] [Revised: 04/23/2020] [Accepted: 04/23/2020] [Indexed: 11/22/2022]
Abstract
An atypical distribution of sperm acrosomal tyrosine-phosphorylated proteins [which include sperm acrosome associated 1 (SPACA1) proteins] may be related to the relatively lesser pregnancy rates when semen of some bulls are used for artificial insemination (AI). There may also be these associations with bull SPACA1 proteins that are translocated from the equatorial segment to the anterior part in the acrosomes during sperm maturation in the normally functioning epididymis. The aim of the present study, therefore, was assessment of the characteristics of bull SPACA1 proteins. Results from immunocytochemical evaluations indicate there were large variations in sperm percentages with typically distributed SPACA1 proteins in acrosomes of cauda epididymal sperm samples (7%-95%). These values were positively correlated with percentages of epididymal spermatozoa with typically distributed acrosomal tyrosine-phosphorylated proteins (r=0.8564, P<0.001). Results indicate there are individual differences in translocation of SPACA1 proteins in the epididymis during sperm maturation, and that SPACA1 protein is one of the main determinants for the typical distribution of acrosomal tyrosine-phosphorylated proteins. In addition, conception rates as a result of AI using cryopreserved spermatozoa tended to be associated with percentages of epididymal spermatozoa with typically distributed SPACA1 proteins. Results from sucrose gradient centrifugation fractionation experiments indicate SPACA1 proteins are sperm membrane raft-associated proteins. Based on these results, it is hypothesized that there is an association between bull subfertility when semen is used for AI and epididymal dysfunctions in the arrangement of membrane lipid rafts during sperm maturation.
Collapse
|
2
|
Arai Y, Sakase M, Fukushima M, Harayama H. Identification of isoforms of calyculin A-sensitive protein phosphatases which suppress full-type hyperactivation in bull ejaculated spermatozoa. Theriogenology 2019; 129:46-53. [PMID: 30798082 DOI: 10.1016/j.theriogenology.2019.02.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 01/04/2019] [Accepted: 02/10/2019] [Indexed: 01/04/2023]
Abstract
In bull spermatozoa, extracellular Ca2+-dependent full-type hyperactivation, which is characterized by the asymmetrical beating in whole parts of the middle/principal pieces, is suppressed by calyculin A-sensitive protein phosphatases. The aim of this study was to identify isoforms of these protein phosphatases. Ejaculated spermatozoa were used for the investigation on effects of protein phosphatase inhibitors (calyculin A with high specificity for both of protein phosphatases 1 and 2A, and okadaic acid with relatively higher specificity for protein phosphatase 2A than protein phosphatase 1) on the induction of extracellular Ca2+-dependent full-type hyperactivation by incubation with CaCl2 and cAMP analog (cBiMPS). They were also used for the immunodetection of protein phosphatases 1α, 1β, 1γ, 2Aα and 2Aβ. Percentages of full-type hyperactivated spermatozoa significantly increased after incubation with calyculin A (10 nM) in a concentration-dependent manner of CaCl2 (0-3.42 mM), though only minor increases in the percentages of full-type hyperactivated spermatozoa were observed after incubation with okadaic acid (10 nM). Moreover, the immunodetection of protein phosphatase isoforms showed sperm connecting piece and flagellum included protein phosphatases 1α and 1γ, but did not do the other isoforms. These results suggest that calyculin A-sensitive and okadaic acid-less sensitive protein phosphatases (1α and 1γ) are suppressors for the extracellular Ca2+-dependent full-type hyperactivation in bull ejaculated spermatozoa.
Collapse
Affiliation(s)
- Yuka Arai
- Laboratory of Reproductive Biology, Division of Animal Science, Department of Bioresource Science, Graduate School of Agricultural Science, Kobe University, Japan
| | - Mitsuhiro Sakase
- Hokubu Agricultural Institute, Hyogo Prefectural Technology Center for Agriculture, Forestry and Fisheries, Japan
| | - Moriyuki Fukushima
- Hokubu Agricultural Institute, Hyogo Prefectural Technology Center for Agriculture, Forestry and Fisheries, Japan
| | - Hiroshi Harayama
- Laboratory of Reproductive Biology, Division of Animal Science, Department of Bioresource Science, Graduate School of Agricultural Science, Kobe University, Japan.
| |
Collapse
|
3
|
Fujii T, Hirayama H, Fukuda S, Kageyama S, Naito A, Yoshino H, Moriyasu S, Yamazaki T, Sakamoto K, Hayakawa H, Takahashi K, Takahashi Y, Sawai K. Expression and localization of aquaporins 3 and 7 in bull spermatozoa and their relevance to sperm motility after cryopreservation. J Reprod Dev 2018; 64:327-335. [PMID: 29798965 PMCID: PMC6105742 DOI: 10.1262/jrd.2017-166] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Artificial insemination with cryopreserved semen is a well-developed technique commonly used for controlled reproduction in cattle. However, despite current technical advances,
cryopreservation continues to damage bull spermatozoa, resulting in a loss of approximately 30 to 50% of viable spermatozoa post thawing. To further improve the efficiency of
cryopreservation of bull spermatozoa, understanding the molecular mechanisms underlying the cryobiological properties that affect cryoinjuries during cryopreservation process of bull
spermatozoa is required. In this study, we examined the expression and localization of aquaporin (AQP) 3 and AQP7 in fresh, cooled, and frozen-thawed bull spermatozoa. Furthermore, we
investigated the relevance of AQP3 and AQP7 to motility and to membrane integrity in frozen-thawed bull spermatozoa. Western blotting against AQP3 and AQP7 in bull spermatozoa revealed bands
with molecular weights of approximately 42 kDa and 53 kDa, respectively. In immunocytochemistry analyses, immunostaining of AQP3 was clearly observed in the principal piece of the sperm
tail. Two immunostaining patterns were observed for AQP7 ―pattern 1: diffuse staining in head and entire tail, and pattern 2: diffuse staining in head and clear staining in mid-piece.
Cooling and freeze-thawing did not affect the localization pattern of AQP7 and the relative abundances of AQP3 and AQP7 evaluated by Western blotting. Furthermore, we demonstrated that the
relative abundances of AQP3 and AQP7 varied among ejaculates, and they were positively related to sperm motility, particularly sperm velocity, post freeze-thawing. Our findings suggest that
AQP3 and AQP7 are possibly involved in the tolerance to freeze-thawing in bull spermatozoa, particularly in the sperm’s tail.
Collapse
Affiliation(s)
- Takashi Fujii
- Animal Biotechnology Group, Animal Research Center, Hokkaido Research Organization, Hokkaido 081-0038, Japan.,United Graduate School of Agricultural Science, Iwate University, Iwate 020-8550, Japan
| | - Hiroki Hirayama
- Animal Biotechnology Group, Animal Research Center, Hokkaido Research Organization, Hokkaido 081-0038, Japan.,Department of Bioproduction, Faculty of Bioindustry, Tokyo University of Agriculture, Hokkaido 099-2493, Japan
| | - Shigeo Fukuda
- Animal Biotechnology Group, Animal Research Center, Hokkaido Research Organization, Hokkaido 081-0038, Japan
| | - Soichi Kageyama
- Animal Biotechnology Group, Animal Research Center, Hokkaido Research Organization, Hokkaido 081-0038, Japan
| | - Akira Naito
- Animal Biotechnology Group, Animal Research Center, Hokkaido Research Organization, Hokkaido 081-0038, Japan
| | - Hitomi Yoshino
- Animal Biotechnology Group, Animal Research Center, Hokkaido Research Organization, Hokkaido 081-0038, Japan
| | - Satoru Moriyasu
- Animal Biotechnology Group, Animal Research Center, Hokkaido Research Organization, Hokkaido 081-0038, Japan
| | | | - Kozo Sakamoto
- Genetics Hokkaido Association, Hokkaido 089-0103, Japan
| | | | | | | | - Ken Sawai
- United Graduate School of Agricultural Science, Iwate University, Iwate 020-8550, Japan
| |
Collapse
|
4
|
Arai MM, Minami K, Ogura Y, Otsuka N, Hama S, Harayama H, Sakase M, Fukushima M. Variation among individual bulls in the distribution of acrosomal tyrosine-phosphorylated proteins in epididymal and ejaculated spermatozoa. Reprod Fertil Dev 2017; 29:1297-1305. [DOI: 10.1071/rd15483] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2015] [Accepted: 04/07/2016] [Indexed: 12/28/2022] Open
Abstract
In Japanese black cattle, AI severely subfertile males have occasionally been found. In order to solve this problem, we previously asserted the need for exact examinations of acrosomal tyrosine-phosphorylated proteins and acrosome morphology in cryopreserved spermatozoa. In the present study, we further investigated acrosomal tyrosine-phosphorylated proteins in spermatozoa before cryopreservation and examined possible relationships between these phosphoproteins and acrosome stability. Ejaculated, epididymal and cryopreserved spermatozoa were subjected to examinations of general characteristics (motility, shape and acrosome morphology) and indirect immunofluorescence of acrosomal phosphoproteins. Unlike all general characteristic parameters, the distribution of acrosomal tyrosine-phosphorylated proteins in ejaculated and cauda epididymal spermatozoa varied considerably among bulls and was linked to the maintenance of morphologically normal acrosomes in cryopreserved spermatozoa or ejaculated spermatozoa after 270 min incubation. Moreover, the distribution of these phosphoproteins was arranged in the spermatozoa of the proximal epididymides. These findings indicate that acrosomal tyrosine-phosphorylated proteins are distributionally arranged during early process of sperm maturation, that their distribution of cauda epididymal and ejaculated spermatozoa are largely different among bulls, and that varied states of acrosomal phosphoproteins may result in individual differences in acrosome stability among bulls.
Collapse
|
5
|
Fukuda M, Sakase M, Fukushima M, Harayama H. Changes of IZUMO1 in bull spermatozoa during the maturation, acrosome reaction, and cryopreservation. Theriogenology 2016; 86:2179-2188.e3. [DOI: 10.1016/j.theriogenology.2016.07.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 07/11/2016] [Accepted: 07/11/2016] [Indexed: 12/27/2022]
|
6
|
Changes in the distribution and molecular mass of boar sperm acrosome-associated 1 proteins during the acrosome reaction; their validity as indicators for occurrence of the true acrosome reaction. Anim Reprod Sci 2016; 172:94-104. [DOI: 10.1016/j.anireprosci.2016.07.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Revised: 06/28/2016] [Accepted: 07/12/2016] [Indexed: 01/01/2023]
|
7
|
Mizuno Y, Isono A, Kojima A, Arai MM, Noda T, Sakase M, Fukushima M, Harayama H. Distinct segment-specific functions of calyculin A-sensitive protein phosphatases in the regulation of cAMP-triggered events in ejaculated bull spermatozoa. Mol Reprod Dev 2015; 82:232-50. [PMID: 25735235 DOI: 10.1002/mrd.22465] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Accepted: 02/02/2015] [Indexed: 12/19/2022]
Abstract
Livestock spermatozoa possess more tenacious suppressors of cAMP-triggered events-including capacitation-associated changes-than laboratory animal spermatozoa, leading to flagellar hyperactivation. In order to identify the suppressors, we examined effects of an inhibitor of serine/threonine protein phosphatases (calyculin A) on cAMP-triggered changes in the protein phosphorylation state, and subsequent occurrence of hyperactivation and acrosome reaction in ejaculated bull spermatozoa. Ejaculated spermatozoa were incubated in cAMP-supplemented medium, then assessed for motility, acrosome morphology, and phosphorylated protein localization. The addition of calyculin A greatly enhanced cAMP-triggered protein phosphorylation at serine/threonine and tyrosine residues in the connecting piece and induction of flagellar hyperactivation. Most hyperactivated spermatozoa exhibited extremely asymmetrical bends at the middle piece, which produced intensive twisting or figure-eight movements. In the sperm head, however, cAMP-triggered dephosphorylation of serine/threonine-phosphorylated proteins and subsequent acrosome reaction were abolished by the addition of calyculin A. Based on these results, we suggest that calyculin A-sensitive protein phosphatases in the connecting piece are suppressors of cAMP-triggered events leading to hyperactivation. By contrast, similar protein phosphatases in the sperm head accelerate cAMP-triggered events leading to the acrosome reaction. These findings are consistent with the indication that calyculin A-sensitive protein phosphatases have distinct functions in the regulation of cAMP-triggered events in different regions of ejaculated bull spermatozoa.
Collapse
Affiliation(s)
- Yohei Mizuno
- Laboratory of Reproductive Biology, Division of Animal Science, Department of Bioresource Science, Graduate School of Agricultural Science, Kobe University, Kobe, 657-8501, Japan
| | | | | | | | | | | | | | | |
Collapse
|