Development of bison embryos produced by parthenogenesis, interspecies somatic cell nuclear transfer, and ooplasm transfer
Notice bibliographique
Résumé
The success of reproductive biotechnologies including in vitro embryo production in bison species has been low although several techniques, such as interspecies somatic cell nuclear transfer (iSCNT) hold promise of efficacy in this species. However, interactions between cattle ooplasmic components and bison nuclear structures influence early development in bison iSCNT embryos. Differences in ATP content, incidence of apoptosis, and gene expression between cattle SCNT and bison iSCNT embryos suggest altered interactions in nuclear and mitochondrial genomes, although no differences in developmental rates were observed. A cattle IVM maturation and IVC system were used to determine the developmental potential of plains bison oocytes as cytoplasts. Maturation and developmental rates were similar between cattle and plains bison. The majority of oocytes in both groups reached metaphase meiosis II at 24 hours post maturation and the 8-16 cell stage on day 4. Although total blastocyst rate was similar between cattle and plains bison, embryos in the latter group consistently reached the blastocyst stage 24 to 48 hours after cattle parthenogenic embryos. Modifications to previously described ooplasm transfer techniques were performed to decrease the number of micromanipulations needed when combined with SCNT. The effects of ooplasm transfer into cattle SCNT and iSCNT plains bison embryos was investigated and demonstrated that supplementation of ooplasm matching the genetic origin of the somatic cell in reconstructed SCNT or iSCNT embryos had no effects on development, ATP content, and gene expression profiles at the 8-16 cell stage. Finally, embryo quality between vitrified-thawed wood bison blastocysts produced in vivo and wood bison iSCNT blastocysts generated in vitro was investigated. The percentage of in vivo-derived embryos showing normal morphology was only 20% of that in vitro. Although in vivo embryos expanded, initiated the hatching process, and had higher total cell number, no differences were found in apoptosis incidence when compared to iSCNT embryos. Delayed development at the blastocyst stage was observed in iSCNT wood bison embryos when compared to in vivo embryos. The present study demostrated developmental alterations in iSCNT bison embryos, no effects on development by ooplasm supplementation, and compromised competence of in vivo-derived wood bison embryos.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,001 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,001 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».