Results 241 to 250 of about 79,883 (298)

Hyperaldosteronism in Mice Lacking the Distal Polybasic Tract of the γ‐Subunit of the Epithelial Sodium Channel During Sodium Restriction

Acta Physiologica, Volume 242, Issue 6, June 2026.
ABSTRACT Aims The epithelial sodium channel ENaC consists of the subunits α, β, and γ and is activated at an individual channel level by proteolytic processing. Murine γENaC contains a distal polybasic tract 186RKRK mediating proteolytic ENaC activation by serine proteases in vitro.
Daniel Essigke, M. Zaher Kalo, Matthias Wörn, Xia‐Qing Li, Bernhard N. Bohnert, Anja Schork, Andreas L. Birkenfeld, Thomas Ott, Ferruh Artunc   +8 more
wiley   +1 more source

Developmental expression of Ap‐Vas proteins in aphids and flies reveals their evolutionary roles in insects

Insect Molecular Biology, Volume 35, Issue 3, Page 217-231, June 2026.
Duplication of vas genes is universally observed in aphids, and phylogenetic analysis indicates that this event predates the divergence of Aphididae and Phylloxeridae. Ap‐vas1 is germline‐specific, whereas Ap‐vas2–4 exhibit somatic expression, indicating functional divergence during aphid embryogenesis.
Gee‐Way Lin, Szu‐Chieh Wang, Charles E. Cook, Ming‐Der Lin, Chun‐che Chang   +4 more
wiley   +1 more source

Cardiac calcium channels expressed in Xenopus oocytes are modulated by dephosphorylation but not by cAMP-dependent phosphorylation [PDF]

, 1994
Biel, Martin, Dascal, Nathan, Flockerzi, Veit, Hofmann, Franz, Lotan, Ilana, Singer-Lahat, Dafna   +5 more
core  

Translational Fidelity Decline in the Aging Oocyte and Embryo Development. [PDF]

Int J Mol Sci
Voros C, Chatzinikolaou F, Papadimas G, Papapanagiotou I, Koulakmanidis AM, Athanasiou D, Bananis K, Athanasiou A, Athanasiou A, Tsimpoukelis C, Karpouzos A, Daskalaki MA, Trakateli C, Koranteng NK, Theodora M, Thomakos N, Antsaklis P, Loutradis D, Daskalakis G.   +18 more
europepmc   +1 more source

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Assisted oocyte activation

Česká gynekologie, 2023
Objective: Currently, there is a rapid increase in studies on assisted oocyte activation, which can significantly improve the process of in vitro fertilization. Fertilization of oocytes by conventional methods and by intracytoplasmic sperm injection can be affected by insufficient activation of the oocyte.
Pavel, Trávník, Michal, Ješeta, Renata, Hűttelová, Radomír, Křen, Lukáš, Landsmann, Andrea, Nesvadbová, Gabriela, Tauwinklová   +6 more
openaire   +2 more sources

Gynogenetic Activation of Porcine Oocytes

Cellular Reprogramming, 2014
The possibility of fertilization without male contribution to the embryonic genome was investigated in pig oocytes. Mature oocytes were co-incubated with sperm, and in an attempt to prevent the incorporation of the sperm head into the ooplasm, the actin polymerization inhibitor cytochalasin B was added to the fertilization medium.
Kiho, Lee, Chunmin, Wang, Lee, Spate, Clifton N, Murphy, Randall S, Prather, Zoltan, Machaty   +5 more
openaire   +2 more sources

Oolemma Receptors and Oocyte Activation

Systems Biology in Reproductive Medicine, 2010
At fertilization the sperm triggers a series of intracellular calcium oscillations that are pivotal to oocyte activation and development. Although the biological significance of the characteristic intracellular calcium (Ca(2+)(i)) oscillations is not fully understood, calcium ions are known to be involved in cortical granule release and in controlling ...
Kenneth L, White, Barry J, Pate, Benjamin R, Sessions   +2 more
openaire   +2 more sources

Electrical activation of mouse oocytes

Theriogenology, 1989
Activation of the oocyte is the least efficient step in nuclear transplantation in the rabbit. We report the influence of age of oocytes, field strength, pulse duration and number, and shape of field on the rate of activation of mouse oocytes by electrical pulses.
P, Collas, J J, Balise, G A, Hofmann, J M, Robl   +3 more
openaire   +2 more sources

Age dependence of bovine oocyte activation

Gamete Research, 1989
AbstractThe ability of bovine oocytes to undergo parthenogenetic activation using either a Ca++‐Mg++‐H+ ionophore (A23187) or electric shock was investigated, as a prelude to understanding activation potential following nuclear transfer into ooplasm. Oocytes were collected from slaughterhouse ovaries by aspiration of 1–5‐mm follicles.
C B, Ware, F L, Barnes, M, Maiki-Laurila, N L, First   +3 more
openaire   +2 more sources

Artificial Oocyte Activation

2022
Against all expectations, the presence of a carefully selected normal spermatozoon does not guarantee oocyte activation/fertilization. In contrast, some ICSI cycles will have to face no or low fertilization in several consecutive cycles. Both sperm- and oocyte-derived problems may account for such a dilemma. In case of physiological activation problems,
openaire   +1 more source