Base de datos : ins
Búsqueda : ESPERMATOGENESIS [Descritor de assunto]
Referencias encontradas : 2 [refinar]
Mostrando: 1 .. 2   en el formato [Detallado]

página 1 de 1

  1 / 2 ins  
              next record last record
selecciona
para imprimir
Texto completo
Id:8587
Autor:Gonzales Rengifo, Gustavo Francisco; Villaorduña Caldas, Leonidas; Gasco Tantachuco, Manuel; Rubio Marquina, Julio; Gonzales Arimborgo, Carla.
Título:Maca (Lepidium meyenii Walp), una revisión sobre sus propiedades biológicas^ies / Maca (Lepidium meyenii Walp), a review of its biological properties
Fuente:Rev. peru. med. exp. salud publica;31(1):100-110, ene.- mar. 2014. ^bgraf.
Resumen:La maca (Lepidium meyenii) es una planta que crece sobre los 4000 metros de altitud en los Andes Centrales del Perú, presenta diferentes variedades de acuerdo al color de su hipocótilo. La presente revisión resume los resultados de estudios sobre los efectos de la maca en la función sexual, la espermatogénesis, la función reproductiva femenina, la memoria, la depresión y la ansiedad, como energizante y contra la hiperplasia benigna de próstata, osteoporosis y síndrome metabólico. Se discute también su efecto antienvejecimiento y la seguridad en su consumo. Se han demostrado diferencias en el efecto de las variedades negra, amarilla y roja de maca. La maca negra es la que mejores resultados presenta sobre la espermatogénesis, la memoria y contra la fatiga, mientras que la maca roja es la variedad que mejor revierte la hiperplasia benigna de próstata y la osteoporosis inducida experimentalmente. Además, la maca reduce los niveles de glucosa, y su consumo se relaciona con la reducción de la presión arterial y un mejor puntaje de salud. Estudios experimentales han demostrado que el consumo a corto como a largo plazo no muestra toxicidad tanto in vivo como in vitro. A pesar que los estudios experimentales han demostrado que la maca presenta diversos efectos benéficos, son necesarios más estudios clínicos para confirmar estos resultados. (AU)^iesMaca (Lepidium meyenii) is a plant that grows above 4000 altitude meters in Peru’s Central Andes; it has different varieties according to the color of the hypocotyl. This review summarizes the results of studies about the effects of maca on sexual function, spermatogenesis, female reproductive function, memory, depression and anxiety, and energy as well as effects on benign prostatic hyperplasia, osteoporosis and metabolic syndrome. Its anti-aging effect is also discussed as well as safety in consumption. Differences have been shown between the effects of the black, yellow and red maca varieties. Black maca shows the best results on spermatogenesis, memory and fatigue, while red maca is the variety that reverses the benign prostatic hyperplasia and experimentally induced osteoporosis. In addition, maca reduces the glucose levels, and its consumption is related to the lowering of blood pressure and an improved health score. Experimental studies have proven that short and long term consumption don’t show in vivo and in vitro toxicity. Although experimental studies have shown that maca has diverse beneficial effects, more clinical studies are needed to confirm these results. (AU)^ien.
Descriptores:Espermatogénesis
Hiperplasia Prostática
Osteoporosis
Fatiga
Toxicidad
Lepidium
Perú
Medio Electrónico:http://www.rpmesp.ins.gob.pe/index.php/rpmesp/article/view/15/15 / es
Localización:PE14.1


  2 / 2 ins  
              first record previous record
selecciona
para imprimir
Id:8318
Autor:Chung, F; Rubio, J; Gonzales, C; Gasco, M; Gonzales, G. F
Título:Dose-response effects of Lepidium meyenii (Maca) aqueous extract on testicular function and weight of different organs in adult rats^ien ..-
Fuente:Lausanne; Elsevier Sequoia; 2005. 143-7 p. ^btab, ^bgraf.
Resumen:Lepidium meyenii (Brassicaceae) known as Maca grows exclusively between 4000 and 4500 m over the sea level in the Peruvian central Andes. The dried hypocotyls of Maca are traditionally used as food and for its supposed fertility-enhancing properties. A dose-response study was performed to determine the effect of 7 days oral administration of an aqueous lyophilized extract of Maca at 0.01-5 g/kg (corresponding to 0.022-11 g dry hypocotyls of Maca/kg) on body and different organ weights, stages of the seminiferous tubules, epididymal sperm count and motility, and serum testosterone and estradiol levels in rats. In doses up to 5 g extract/kg, no toxicity was observed. Almost all organ weights were similar in controls and in the Maca extract-treated groups. Seminal vesicles weight was significantly reduced at 0.01 and 0.10 g extract/kg. Maca increased in length of stages VII-VIII of the seminiferous tubules in a dose-response fashion, with highest response at 1.0 g/kg, while caput/corpus epididymal sperm count increased at the 1.0 g dose. Cauda epididymal sperm count, sperm motility, and serum estradiol level were not affected at any of the doses studied. Serum testosterone was lower at 0.10 g extract/kg. Low-seminal vesicle weights correlated with low-serum testosterone levels (R2=0.33; P<0.0001) and low-testosterone/estradiol ratio (R2=0.35; P<0.0001). Increase in epididymal sperm count was related to lengths of stages VII-VIII. Highest effect on stages VII-VIII of the seminiferous tubules was observed at 1.0 g Maca aqueous extract/kg. The present study demonstrated that Maca extract in doses up to 5 g/kg (equivalent to the intake of 770 g hypocotyls in a man of 70 kg) was safe and that higher effect on reproductive parameters was elicited with a dose of 1 g extract/kg corresponding to 2.2 g dry Maca hypocotyls/kg. (AU)^ien.
Descriptores:Espermatogénesis
Lepidium
Testosterona
Estradiol
Ratas
Límites:Animales
Ratas
Localización:PE14.1



página 1 de 1
   


Refinar la búsqueda
  Base de datos : ins Formulario avanzado   
Buscar por : Formulario libre   

    Buscar en el campo  
1  
2
3
 
           



Search engine: iAH v2.6.1 powered by WWWISIS

BIREME/OPS/OMS - Centro Latinoamericano y del Caribe de Información en Ciencias de la Salud