P-413 Non-autologous human platelet lysate stimulates <i>in vitro</i> proliferation of primary human endometrial cells from patients with recurrent implantation failure
Notice bibliographique
Résumé
Abstract Study question Does patient diagnosis impact induction of primary human endometrial cell proliferation by commercial non-autologous human platelet lysate (HPL)? Summary answer HPL stimulates in vitro proliferation of both primary endometrial epithelial cells (EECs) and stromal cells (ESCs) from patients with and without recurrent implantation failure (RIF). What is known already Inadequate endometrial receptivity and thickness are major causes for RIF. Our preliminary results suggested that non-autologous HPL stimulates in vitro proliferation of primary human EECs and ESCs isolated from patients with a history of RIF, with and without a thin endometrium (TE). In addition, using an in vitro model of embryo attachment, we reported that 48-hour treatment with HPL significantly augments the attachment of trophoblast spheroids (generated with HTR-8/SVneo cells) to EECs, suggesting an increase in endometrial receptivity following treatment. This suggests that HPL may standardize future clinical treatments for a TE and endometrial origins of RIF. Study design, size, duration Endometrial tissue was collected from five patients without RIF (control) and eighteen RIF patients at the CReATe Fertility Centre, Toronto, Canada. The eighteen RIF patients were further classified into three groups (N = 6 each) based on endometrial phenotype: 1) proliferative phase RIF only (without a TE), 2) secretory phase RIF only (without a TE), and 3) secretory phase RIF+TE (with a TE). Primary EECs and ESCs were enzymatically isolated and cultured separately. Participants/materials, setting, methods Primary EECs and ESCs were serum-starved with serum-free culture media (SFM) for 24 hours and then treated for 48 hours with the following treatment media: SFM (negative control), or SFM supplemented with 1% HPL for EECs, or 10% HPL for ESCs. Cell viability and proliferation were assessed using the metabolic assay PrestoBlue reagent and immunocytochemistry to quantify cells actively expressing the nuclear proliferation marker Ki67. Main results and the role of chance The metabolic assay demonstrated that 48-hour treatment with non-autologous HPL stimulates a similar significant increase in EEC viability and proliferation for all patient groups. EECs from patients without RIF (control) had the highest fold increase (1.49-fold, P &lt;0.001), followed by proliferative phase RIF only (1.41-fold, P &lt;0.001), secretory phase RIF+TE (1.39-fold, P &lt;0.001), and secretory phase RIF only (1.24-fold, P &lt;0.05). For ESCs, HPL stimulated a significant 2.69-fold increase in cell viability and proliferation for the secretory phase RIF+TE patient group (P &lt;0.01). Pairwise comparison of the ratio of actively proliferating (Ki67+) cells between SFM and HPL treatment revealed that EECs isolated from control patients had the highest and most significant increase by 27.3% (P &lt;0.05) after HPL treatment. Although not statistically significant, EECs isolated from all RIF patients displayed a similar trend of increased Ki67+ cells after HPL treatment. Whereas HPL treatment significantly increased the ratio of Ki67+ cells for ESCs isolated from both the proliferative phase (by 23.9%, P &lt;0.05) and secretory phase (by 29.9%, P &lt;0.05) endometrium of RIF only patients. Limitations, reasons for caution Although our data suggests that HPL treatment significantly stimulates primary endometrial cell proliferation in vitro, our sample size per group is small (N = 5-6). A larger sample size and future randomized controlled trials are needed to determine the efficacy of HPL as a treatment for a TE and/or RIF. Wider implications of the findings Our study provides the groundwork to improve clinical treatment of a TE and endometrial origins of RIF. We anticipate that in addition to stimulating cell proliferation, HPL will also induce a broad transcriptional response towards improved endometrial receptivity. We will next focus on characterizing the transcriptomic profile following HPL treatment. Trial registration number not applicable
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 | 0,001 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,001 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,001 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 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 ».