Zobrazeno 1 - 10
of 44
pro vyhledávání: '"Steffen Blottner"'
Publikováno v:
Growth Factors. 28:202-210
Vascular endothelial growth factor A (VEGFA) influences spermatogenesis, but its impact on seasonally regulated sperm production is still not fully understood. Thus, we investigated both expression levels and localisation of VEGFA and its receptors V
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fba5af2d889c8f0674af7fbf62a668de
https://doi.org/10.3109/08977191003587668
https://doi.org/10.3109/08977191003587668
Autor:
Steffen Blottner, H. Roelants
Publikováno v:
Andrologia. 30:331-337
Summary The percentages of somatic and spermatogenic cells were quantified at different time intervals in testes of three seasonal breeders: roe deer, brown hare and mink. The haploid, diploid and tetraploid cells were monitored by one-parameter flow
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::09135acde355d70890eb325905147a6b
https://doi.org/10.1111/j.1439-0272.1998.tb01179.x
https://doi.org/10.1111/j.1439-0272.1998.tb01179.x
Autor:
Steffen Blottner, Jennifer Schön
Publikováno v:
Animal Reproduction Science. 111:344-352
The roe deer shows a distinct seasonal breeding pattern accompanied with significant changes in testicular structure and function during the annual cycle. It serves as a uniquely well-characterized ruminant model system to investigate the regulation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::21e558d17adf2a5b1a221eaafe263f01
https://doi.org/10.1016/j.anireprosci.2008.03.008
https://doi.org/10.1016/j.anireprosci.2008.03.008
Autor:
Jennifer Schön, Budhan S. Pukazhenthi, Katarina Jewgenow, Steffen Blottner, Katrin Neubauer, David E. Wildt
Publikováno v:
Journal of Andrology. 30:460-468
Teratospermia (>60% morphologically abnormal sperm/ejaculate) is associated with increased sperm output in the domestic cat. The objective of this study was to determine whether increased sperm production in teratospermic donors was associated with d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a23b2a346a341a40fcc698a18f1d874d
https://doi.org/10.2164/jandrol.108.006726
https://doi.org/10.2164/jandrol.108.006726
Autor:
Frank Goeritz, Chris Walzer, Steffen Blottner, Timothy J. Portas, Gudrun Wibbelt, W J Streich, Benn Bryant, Thomas B. Hildebrandt, Robert Hermes, C.E. Reid
Publikováno v:
Theriogenology. 71:275-291
To increase the quality of cryopreserved sperm in white rhinoceros, the liquid nitrogen vapour (LN vapour) freezing and the multi-thermal gradient directional freezing methods were compared. Sixteen white rhinoceros (Ceratotherium simum sp.) were ele
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7bad9649c134c4636d124bf4013e2638
https://doi.org/10.1016/j.theriogenology.2008.07.009
https://doi.org/10.1016/j.theriogenology.2008.07.009
Autor:
Steffen Blottner, K. Jewgenow
Publikováno v:
Reproduction in Domestic Animals. 42:536-540
Adult male domestic cats are known to produce sperm throughout the year, although sexual activity is influenced by geographical location. In the northern hemisphere, feral domestic cats reproduce usually between January and July. Thus, seasonality in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e341f1079616c6e9b234fd6c6f42d8ce
https://doi.org/10.1111/j.1439-0531.2006.00817.x
https://doi.org/10.1111/j.1439-0531.2006.00817.x
Publikováno v:
Cell and Tissue Research. 327:615-624
Apoptosis is involved in the regulation of spermatogenesis. The involution of testes in seasonal breeders might be expected to involve enhanced apoptotic cell elimination. We have compared seasonally changing testicular apoptosis in roe deer with tha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::81ffd76be087a965d33c6b1cb4782e0e
https://doi.org/10.1007/s00441-006-0328-8
https://doi.org/10.1007/s00441-006-0328-8
Publikováno v:
International Journal of Andrology. 29:122-128
Summary In mature male seasonal breeders, the circannual cycles of testicular growth and involution involve significant changes in structure and function of both the tubular and interstitial testicular compartment. Roe deer (Capreolus capreolus) are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4b3ead07d72b0184db0a44985e019f16
https://doi.org/10.1111/j.1365-2605.2005.00603.x
https://doi.org/10.1111/j.1365-2605.2005.00603.x
Publikováno v:
European Journal of Wildlife Research. 52:9-13
The exact seasonal timing of normal testis function is a crucial precondition for the reproductive fitness of roe bucks and for successful breeding during rut in July–August. Production of spermatozoa and testosterone requires both endocrine regula
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::96257e1a510ba71891e2fd9691fc7956
https://doi.org/10.1007/s10344-005-0005-3
https://doi.org/10.1007/s10344-005-0005-3
Autor:
Marilyn L. Patton, Christian Walzer, Sandra Silinski, Frank Göritz, Robert Hermes, Franz Schwarzenberger, Gudrun Wibbelt, Steffen Blottner, Thomas B. Hildebrandt
Publikováno v:
Theriogenology. 63:219-238
White rhinoceroses suffer from a low rate of reproduction in captivity. This study examines the role of male reproductive function as a contributing factor. We used ultrasonography to image accessory sex glands, testis and epididymis. Electroejaculat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::584338889d926a83c2f527bd13a9791a
https://doi.org/10.1016/j.theriogenology.2004.04.007
https://doi.org/10.1016/j.theriogenology.2004.04.007