Ubiquitin-proteasome system participates in the de-aggregation of spermadhesins and DQH protein during boar sperm capacitation

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652036%3A_____%2F19%3A00510859" target="_blank" >RIV/86652036:_____/19:00510859 - isvavai.cz</a>

Alternative codes found

RIV/60460709:41210/19:80647

Result on the web

<a href="https://rep.bioscientifica.com/view/journals/rep/157/3/REP-18-0413.xml" target="_blank" >https://rep.bioscientifica.com/view/journals/rep/157/3/REP-18-0413.xml</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1530/REP-18-0413" target="_blank" >10.1530/REP-18-0413</a>

Result language

angličtina

Original language name

Ubiquitin-proteasome system participates in the de-aggregation of spermadhesins and DQH protein during boar sperm capacitation

Original language description

We studied the participation of the ubiquitin-proteasome system (UPS) in spermadhesin release during in vitro capacitation (IVC) of domestic boar spermatozoa. At ejaculation, boar spermatozoa acquire low molecular weight (8-16 kDa) seminal plasma proteins, predominantly spermadhesins, aggregated on the sperm surface. Due to their arrangement, such aggregates are relatively inaccessible to antibody labeling. As a result of de-aggregation and release of the outer layers of spermadhesins from the sperm surface during IVC, antibody labeling becomes feasible in the capacitated spermatozoa. In vivo, the capacitation-induced shedding of spermadhesins from the sperm surface is associated with the release of spermatozoa from the oviductal sperm reservoir. We took advantage of this property to perform image-based flow cytometry to study de-aggregation and shedding of boar spermadhesins (AQN, AWN, PSP protein families) and boar DQH (BSP1) sperm surface protein which induces higher fluorescent intensity in capacitated vs ejaculated spermatozoa. Addition of a proteasomal inhibitor (100 pM MG132) during IVC significantly reduced fluorescence intensity of all studied proteins (P< 0.05) compared to vehicle control IVC. Western blot detection of spermadhesins did not support their retention during IVC with proteasomal inhibition (P> 0.99) but showed the accumulation of DQH (P=0.03) during IVC, compared to vehicle control IVC. Our results thus demonstrate that UPS participates in the de-aggregation of spermadhesins and DQH protein from the sperm surface during capacitation, with a possible involvement in sperm detachment from the oviductal sperm reservoir and/or sperm-zona pellucida interactions. The activity of sperm UPS modulates de-aggregation of boar spermadhesins and DQH sperm surface protein/binder of sperm1 (BSP1) during the sperm capacitation.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10604 - Reproductive biology (medical aspects to be 3)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Reproduction

ISSN

1470-1626

e-ISSN

—

Volume of the periodical

157

Issue of the periodical within the volume

3

Country of publishing house

GB - UNITED KINGDOM

Number of pages

13

Pages from-to

283-295

UT code for WoS article

000457578600011

EID of the result in the Scopus database

2-s2.0-85065722693