Entradas

Is there any connection between pregnancy and cancer metastasis?

-
Imagen
Pregnancy might hold the key to understanding how cancer metastasizes in various mammals -- including humans, according to researchers. Kshitiz, assistant professor in the department of biomedical engineering -- a shared department between the School of Dental Medicine, School of Medicine, and School of Engineering -- and Gunter Wagner and Andre Levchenko at Yale University used evolutionary biology to draw the connection in the Nature Ecology & Evolution journal.
Looking at cells from endometrium of various species, Scientists found that in order to resist invasion of the placenta, certain species have evolved over time to make their stromal cells -- the connective tissue cells in an organ -- highly resistant to any invasion. 
In contrast, humans are particularly vulnerable to cancer metastasis owing to their highly invasive placentation during pregnancy. This study identified the cause linking the curious similarity between pregnancy and cancer invasion across various mammals.
&quo…
Publicar un comentario
Leer más

How Reptiles are affected by Climate Change?

-
Imagen
Reptiles(snakes, lizards, turtles and crocodiles), like all invertebrates, fish and amphibians, are Ectotherms. This means that its metabolism (the set of life-sustaining chemical reactions in organisms)is temperature dependent.  Besides, the sex of reptiles is determined by temperature and not by chromosomes (as in the case of humans where sex is determined by the chormosomes carried on the sperm cells). 
Knowing these data, what do you think will happen with reptiles if the constant increase in temperature worldwide continues?. (Fell free to leave your opinion)

Allow me to give you just an example: In turtles, a cooler incubation temperature of the eggs activates a gene that causes testicles to develop instead of ovaries. On the contrary, a high incubation temperature (as is currently the case with global warming) causes more female turtles to develop than males causing an imbalance in the turtle population on a global scale. Below these lines I present a brief summary of a very intere…
Publicar un comentario
Leer más

Resumen: Noticias de Animales (algunas imagenes pueden dañar su sensibilidad)

-
Imagen
1. Ladrillos de heces de Perros? Si, como lo oye!!. Un grupo de estudiantes de secundaria en Filipinas ha encontrado una manera de convertir las heces de perros callejeros en una mezcla para ladrillos, con el objetivo de eliminar los excrementos de las calles de la ciudad y potencialmente incluso reducir los costos de construcción.

Como parte de un proyecto de investigación, estudiantes de octavo grado en el distrito de Payatas al norte de la capital, Manila, reunieron y secaron las heces de perro, las que luego mezclaron con polvo de cemento y moldearon en “bioladrillos” rectangulares.
Fuente: reuters __________________________________________________________________________________________
2. Efectos del calentamiento global en las Aves El calentamiento debilita el sistema inmune de las rapaces mientras trastoca las migraciones de otros pájaros





Publicar un comentario
Leer más

Un nuevo Virus provocado por el Calentamiento Global esta matando Especies marinas

-
Imagen
El derretimiento del hielo marino del Ártico ha abierto nuevas vías para que las especies árticas y subárticas interactúen, y ese contacto ha introducido un virus potencialmente mortal para los mamíferos en el Océano Pacífico norte, según un nuevo estudio publicado en la revista Scientific Reports.
Durante 15 años, los investigadores identificaron dos nuevos canales que unen los océanos Atlántico y Pacífico entre Rusia y Alaska. Los animales que viven allí interactúan por primera vez, creando un reservorio del mortal virus conocido como moquillo Phocine.

El virus, también llamado PDV por sus siglas en inglés, se identificó por primera vez en focas comunes europeas y mató a miles en 1988. Luego, nuevamente en 2002. Reapareció en 2004, pero esta vez en las nutrias marinas del norte de Alaska. Fuente: CNN
Publicar un comentario
Leer más

Lobo Mexicano sale de la categoría de "EXTINTO"

-
Imagen
La Semarnat lo cambió de categoría a especie en ‘Peligro de Extinción’, gracias a los esfuerzos de reintroducción realizados desde el año 2011 en la Reserva de la Biosfera de Janos
Publicar un comentario
Leer más

Some amazing Animals with Superpowers

-
Imagen
Worms with Three Sexes Thrive in Arsenic-Laced Lake in CaliforniaScientists found eight nematodes that can live in a lake deemed inhospitable for most animals. Mono Lake in California contains super salty, arsenic-laced water and very few signs of life. Now, researchers have found eight worm species that thrive in the extreme ecosystem — and one of those species has three sexes, according to a new study. Mono Lake lies in the eastern Sierra Mountains and serves as habitat for brine shrimp, diving flies, bacteria and algae, but nothing else — or so scientists thought. Biologist Paul Sternberg and his colleagues at the California Institute of Technology thought that microscopic worms called nematodes might lurk in Mono Lake, partially because the wriggling creatures are considered the most abundant animals on the planet, the researchers said in a statement.  ___________________________________________________________________ Walrus Attacks and Sinks Russian Navy Boat
A walrus attacked and…
Publicar un comentario
Leer más

Rare Shapeshifting Jellyfish with a Prize Inside Found! (VIDEO)

-
Imagen
The underwater recon robot belonging to the team of deep-sea scientists aboard the Nautilus research vessel earlier this month, encountered a limp, limbless creature hovering like a ghostly lantern over the Pacific seafloor. As the team watched, the bell-shaped blob suddenly transformed, ballooning into a long, translucent windsock with a mysterious red splotch stuck to its innards.
The blob, the researchers revealed in a recent video of the encounter, was one of the rarest-seen and least-studied jellyfish in the sea. 
It's called Deepstaria (named for the research vessel that first discovered the genus in the 1960s), and has been seen only a dozen or so times in the last half-century. Researchers don't know much about the armless, shapeshifting sack, but they do know it has a habit of expanding its body to engulf any prey trusting enough to swim nearby. That could explain the red splotch inside the jelly's belly. When the researchers zoomed in on the shapeshifting jelly, th…
Publicar un comentario
Leer más