[Neurosurgical importance of the superior petrosal venous complex]. / Importancia neuroquirúrgica del complejo venoso petroso superior.

OBJECTIVE: To study the microsurgical anatomy of the superior petrosal venous complex (SPVC). MATERIAL AND METHODS: We conducted a descriptive and prospective study. Six injected specimens were used (12 sides). The microsurgical anatomy of the SPVC was studied by means of an anterior, retrosigmoid and transpetrosal approach. Neurosurgical equipment, 0-degree rigid endoscopy and OPMI-1 surgical microscope with 6× to 20× magnification were all used in this study. The venous drainage pattern toward the superior petrosal sinus was analysed, as were the formation of tributary veins, the relationship with the trigeminal nerve and the anatomical variants of SPVC. RESULTS: The SPVC was present in all cases. A tributary, cerebellopontine fissure vein was identified in 100% of cases. The venous drainage pattern of the SPVC was divided into medial, intermediate and lateral with respect to the suprameatal crest. The SPVC was simple in 8 sides and duplicate in 4 sides. A triangle formed by the tentorium, the SPVC and part of the tentorial and petrosal surface of the cerebellum was also observed in the study. This triangle was called the petrosal-tentorial triangle. CONCLUSIONS: It is important to understand the microsurgical anatomy of the SPVC. Therefore, we propose the petrosal-tentorial triangle as a neurosurgical route for the management of pathologies from the cerebellopontine angle to the superior petroclival region.

White Button Mushroom Extracts Modulate Hepatic Fibrosis Progression, Inflammation, and Oxidative Stress In Vitro and in LDLR-/- Mice.

Liver fibrosis can be caused by non-alcoholic steatohepatitis (NASH), among other conditions. We performed a study to analyze the effects of a nontoxic, water-soluble extract of the edible mushroom Agaricus bisporus (AB) as a potential inhibitor of fibrosis progression in vitro using human hepatic stellate cell (LX2) cultures and in vivo in LDLR-/- mice. Treatment of LX2 cells with the AB extract reduced the levels of fibrotic and oxidative-related markers and increased the levels of GATA4 expression. In LDLR-/- mice with high-fat diet (HFD)-induced liver fibrosis and inflammation, the progression of fibrosis, oxidative stress, inflammation, and apoptosis were prevented by AB extract treatment. Moreover, in the mouse model, AB extract could exert an antiatherogenic effect. These data suggest that AB mushroom extract seems to exert protective effects by alleviating inflammation and oxidative stress during the progression of liver fibrosis, possibly due to a decrease in Toll-like receptor 4 (TLR4) expression and a reduction in Nod-like receptor protein 3 (NLRP3) inflammasome activation. In addition, we observed a potential atheroprotective effect in our mouse model.

Water-soluble extracts from edible mushrooms (Agaricus bisporus) as inhibitors of hepatitis C viral replication.

Hepatitis C virus (HCV) is the main agent responsible for chronic liver disease. Recent advances in anti-HCV treatment strategies have significantly increased the viral clearance rate (>90%). However, sustained antiviral responses vary in different cohorts, and high costs limit the broad use of direct-acting antivirals (DAAs). The goal of this study is to evaluate the inhibitory ability of well characterized (LC-QTOF-MS/MS) aqueous extracts obtained from edible mushrooms (Agaricus bisporus) to diminish HCV viral replication. Our data have demonstrated an in vitro inhibitory effect of A. bisporus extracts on NS3/4A protease and HCV replication. Fractionation by ultra-filtration and sequential liquid-liquid extraction showed that the compounds responsible for the inhibition are water-soluble with low molecular weights (<3 kDa) and that action could be through the following five compounds: ergothioneine, adenine, guanine, hypoxanthine, and xanthine, which are present in all fractions (UF-3, AqF-3 kDa and organic fractions) showing NS3/4A inhibition. Low molecular weight aqueous extracts (<3 kDa) from A. bisporus have potential applications in the prophylaxis and treatment of HCV, especially for patients who do not have access to the last generation of DAAs. They may be useful as well for other flaviviruses, which also possess a NS3 serine protease.

Importancia neuroquirúrgica del complejo venoso petroso superior / No disponible

Objetivo Conocer la anatomía microquirúrgica del complejo venoso petroso superior (CVPS).Material y métodos Se realizó estudio descriptivo y prospectivo. Se utilizaron 6 especímenes (12 lados) inyectados. Se estudió la anatomía microquirúrgica del CVPS en los encéfalos, mediante un abordaje retrosigmoideo y transpetroso anterior. Se utilizó instrumental neuroquirúrgico, endoscopio rígido de 0 grados, microscopio quirúrgico OPMI-1 con magnificación 6× a 20×. Se analizó el patrón de drenaje hacia el seno petroso superior, la formación de las venas tributarias, la relación con el nervio trigémino y las variantes del CVPS.Resultados El CVPS se encontró en todos los lados, la vena tributaria que se encontró en el 100% de los lados fue la vena de la fisura cerebelopontina. El patrón de drenaje del CVPS fue dividido en relación a la cresta suprameatal en: lateral, medial y en un punto intermedio. Se encontró el CVPS simple, formado por un tronco con sus tributarias, en 8 lados y duplicado en 4 lados. En el estudio se observó un triángulo formado por el tentorio, el CVPS y parte de la cara petrosa y tentorial del cerebelo con bordes y contenidos bien definidos, el cual se llamó triángulo petroso-tentorial. Conclusión Es necesario entender la anatomía microquirúrgica del CVPS. Así, proponemos el triángulo petroso-tentorial como corredor neuroquirúrgico para el manejo de lesiones del ángulo pontocerebeloso a la región petroclival superior (AU)