Notice bibliographique
Résumé
The vertebrate lymphatic system is a network of vessels that collects excess fluid from tissues, delivers the fluid to lymph nodes and then ultimately returns the fluid back to the circulatory system for redistribution. The system plays a critical role in the immune response, fluid balance and the transport of fatty acids. Moreover, the lymphatic system is guilty of transporting cancerous cells throughout the body, spreading cancer to new tissues. As such, many people are interested in studying the lymphatic system to better understand the development and treatment of cancer.Recently, scientists have shown that lymphatic and circulatory vessels are connected in adults. However, the structure and function of these connections, called arterial-lymphatic conduits (ALCs), are unknown. Lasse Dahl Ejby Jensen from the Karolinska Institute in Stockholm, Sweden, together with colleagues from Sweden and Denmark examined ALCs in zebrafish and glass catfish and studied how hypoxia (low levels of oxygen) affects these connections since cancerous tissue is often hypoxic.The research team used various microscopy techniques to examine the lymphatic system and the structure of the ALCs. Fortunately, zebrafish and glass catfish are completely transparent, so the authors also used video and photography to non-invasively observe the flow of blood and lymphatic fluid. They found that zebrafish and glass catfish have similar lymphatic systems and that ALCs often look like tangled corkscrew-shaped vessels, directly connecting lymphatic to arterial vessels.Next, Jensen and colleagues compared fish exposed to hypoxia with those held in normal oxygen levels in order to better understand the functional relationship between the circulatory and lymphatic systems. Remarkably, the authors found that blood, containing red blood cells, flowed into the lymphatic vessels during hypoxia. This incredible finding suggests that the lymphatic system can act as a back-up for the circulatory system. This is a quick and easy way to ameliorate a hypoxic situation, with the lymphatic system stepping in to expand the circulatory system so that it does not have to grow new blood vessels and make new red blood cells.The authors then wanted to figure out how blood enters the lymphatic system. Again using microscopy and video technology, they observed that during hypoxia, ALCs dilate and straighten, indicating that blood is entering the lymphatic system via the ALCs. Finally, Jensen and colleagues sought to determine which molecular players control this phenomenon. Nitric oxide (NO) is known to act on vascular smooth muscle cells to relax and dilate them. The authors used various chemicals to test whether NO induces the ALCs to relax during hypoxia and found that NO is indeed behind the hypoxia-induced flow of blood into the lymphatic system.Jensen and colleagues have uncovered a new function for the lymphatic system: a back-up circulatory system in times of hypoxia. They demonstrated that ALCs act as gatekeepers for blood flow to the lymphatic system during hypoxia. These gates are controlled by NO, which causes ALCs to relax and straighten, allowing blood to enter. Findings from this study could be used to better understand how cancerous tumours, which can be hypoxic, could enter the lymphatic system from the circulation.
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 | 0,000 |
| 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 ».