Monday November 19, 2018

Eat Vegetarian Diet to Ward Away Heart Disease

This is in contrast to the previous research that showed TMAO blood plasma levels -- and heart disease risk -- rise after the consumption of red meat and eggs, the researchers said

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Eat veggies, fish to ward away heart disease. Pixabay
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If you are suffering from high blood pressure, consuming fish, seafood and a primarily vegetarian diet may help reduce hypertension-related heart disease symptoms, a study suggests.

Intake of fish, seafood and vegetarian food increases levels of a compound called trimethylamine N-oxide (TMAO), known to boost heart health, said researchers from the Medical University of Warsaw in Poland.

The study showed that low-dose treatment with TMAO reduced heart thickening (cardiac fibrosis) and markers of heart failure in an animal model of hypertension.

“Our study provides new evidence for a potential beneficial effect of a moderate increase in plasma TMAO on pressure-overloaded heart,” the researchers said.

For the study, published in the American Journal of Physiology – Heart and Circulatory Physiology, researchers analysed the effect of TMAO on rats, which have a genetic tendency to develop high blood pressure.

One group of hypertensive rats were given low-dose TMAO supplements in their drinking water, and another group received plain water.

They were given the TMAO therapy for either 12 weeks or 56 weeks and were assessed for heart and kidney damage as well as high blood pressure.

Heart Attack, women
The study showed that low-dose treatment with TMAO reduced heart thickening (cardiac fibrosis) and markers of heart failure in an animal model of hypertension.
Pixabay

The results showed that TMAO treatment did not affect the development of high blood pressure in any of the spontaneously hypertensive rats.

However, condition of the animals given the compound was better than expected, even after more than a year of low-dose TMAO treatment.

In addition, four- to five-fold increase in plasma TMAO does not exert negative effects on the circulatory system.

This is in contrast to the previous research that showed TMAO blood plasma levels — and heart disease risk — rise after the consumption of red meat and eggs, the researchers said.

Also Read- Women Rising Early Have Lower Risk of Breast Cancer

“It seems that a fish-rich and vegetarian diet, is associated with a significantly higher plasma TMAO than red meat-and egg-rich diets, considered to increase the cardiovascular risk,” the researchers noted.

“However, further study is needed to assess the effect of TMAO and TMA on the circulatory system.” (IANS)

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A Significant Find By Archaeologists Hint At Piranha Like Fish In Jurassic Era

The new fish is a most interesting example of convergent evolution

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Fossil Fish
A new piranha-like fish from Jurassic seas with sharp, pointed teeth that probably fed on the fins of other fishes is seen in this artist's reconstruction of a fossil which was discovered in southern Germany in this image released from Eichstaett, Bavaria, Germany. VOA

You can call it a prehistoric prequel.

Scientists said on Thursday they have unearthed in southern Germany the fossil of a fish that, with its mouth full of razor-sharp teeth, strongly resembled today’s piranhas, the stars of more than their fair share of Hollywood horror films. But this one lived during the Jurassic Period 152 million years ago.

Named Piranhamesodon pinnatomus, it is the earliest known example of a bony fish — as opposed to cartilaginous fish like sharks — able to slice flesh rather than simply swallowing prey, enabling it to attack victims larger than itself as piranhas can.

Piranhamesodon, about 3-1/2 inches (9 cm) long, lived in the sponge and coral reefs of the Solnhofen archipelago, a shallow tropical sea in what is now Bavaria. Piranhas are freshwater fish that inhabit rivers and lakes in South America.

Fossil Fish
A new piranha-like fish fossil from Jurassic seas with sharp, pointed teeth that probably fed on the fins of other fishes, discovered in southern Germany from the time of dinosaurs and from the same deposits that contained Archaeopteryx, is seen in this image released from Eichstaett, Bavaria, Germany on October 18, 2018

Piranhamesodon was small, but its mouth was worthy of a scary movie. It boasted long, pointed, dagger-like teeth along the outer edge of its upper jaw and at the front of its lower jaw. It also had triangular teeth with serrated cutting edges on the side of its lower jaw.

“We were stunned that this fish had teeth which are capable of slicing flesh. It comes from a group of fishes, the pycnodontids, that are famous for their crushing teeth,” said paleontologist Martina Kölbl-Ebert of the Jura-Museum Eichstätt in Germany, who led the research published in the journal Current Biology.

“It is like finding a sheep with a snarl like a wolf,” Kölbl-Ebert added.

The fossil came from the same Bavarian limestone deposits as Archaeopteryx, the earliest-known bird.

“From the same quarry, we also have a number of other fish which may have been the victims of Piranhamesodon. They show injuries to their fins and fin bases, some freshly wounded before they died and got fossilized, whereas others show completely healed injuries with regeneration of the fin,” Kölbl-Ebert said.

Fossil Fish
With Piranha-Like Teeth, This Prehistoric Predator Never Bit Off More Than It Could Chew.

While it shares traits with piranhas, Piranhamesodon was neither their long-ago ancestor nor related to them at all. The oldest-known piranhas lived around 15 million years ago.

Piranhamesodon is an example of a phenomenon called convergent evolution in which organisms independently acquire similar characteristics as a result of adapting to similar ecological niches or environments.

Also Read: Fossils of 400 Year Old Invertebrate Marine Species Found in China

“The new fish is a most interesting example of convergent evolution, evolving — for bony fish then — a completely new way of life,” Kölbl-Ebert said. (VOA)