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Evolutionary gene loss may explain why only humans are prone to heart attack

sciencedaily.com

51–60 of 130 posts

Re: Evolutionary gene loss may explain why only humans are prone to heart attack

#51

I have the feeling this has much more to do with our self inflicted lifestyle than genetic factors. Maybe no other animal is just that stupid.

> Maybe no other animal is just that stupid.

Have you ever owned a cat or dog? My experience is that a percentage of them will overeat unless constantly monitored, eat things that are outright dangerous, etc. What is it that makes humans the stupid ones, here?

Re: Evolutionary gene loss may explain why only humans are prone to heart attack

#52
post #48
post #41

Earlier quoted context omitted.

I fail to see what this has to do with my comment. The hardening in atherosclerosis is caused directly and exclusively by atheroma.

Everything I've ever read says fatty deposits. The NHS website calls fatty deposits "atheroma". You can find multiple definitions of atherosclerosis/atheroma in other places describing them the same way. Wikipedia says: "While the early stages, based on gross appearance, have traditionally been termed fatty streaks by pathologists, they are not composed of fat cells but of accumulations of white blood cells, especial…

What do those cardiologists say? That fat in the blood (triglycerides) causes atherosclerosis? Or dietary fat? Very different things.

Regarding the mechanism of atheroma formation, I don't have a list of references handy, but maybe this is a good start: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3152836/

Also of interest would be the role of high insulin and/or glucose and the damage they can cause to the arterial walls (inflammation is a necessary condition in the formation of atheroma).

Re: Evolutionary gene loss may explain why only humans are prone to heart attack

#53
post #44

It seems that this guys never tried to catch a shrew.

I've seen a mouse die in a "humane" trap after being carried a couple blocks – I always understood that was from a heart attack. It seems to happen with birds too – stress them out a bit, then dead.

So in what way are "only humans" prone? Are these not heart attacks?

Re: Evolutionary gene loss may explain why only humans are prone to heart attack

#54
post #18

If this turns out to be true, I wonder if this is something CRISPR could fix...

I'm not sure that I wish CMAH gene back:

> Interestingly, the evolutionary loss of the CMAH gene appears to have produced other significant changes in human physiology, including reduced human fertility and enhanced ability to run long distances.

Reduced fertility doesn't seem for me important, we have a contraception for that. But enhanced ability to run long distances seems very convenient. I can ride a bicycle or walk for hours just for fun of physical exercise, and I'm not going to lose that.

Re: Evolutionary gene loss may explain why only humans are prone to heart attack

#55
post #44

It seems that this guys never tried to catch a shrew.

I've seen a mouse die in a "humane" trap after being carried a couple blocks – I always understood that was from a heart attack. It seems to happen with birds too – stress them out a bit, then dead. So in what way are "only humans" prone? Are these not heart attacks?

Probably time to agree on what "heart attack" means.

My Dad's heart stopped and he was kept alive by 45 minutes of CPR by burly firefighters - did he have a heart attack? Nope. His heart's pacemaker cells went on the fritz, but it wasn't a myocardial infarction.

A "heart attack" is a myocardial infarction, but many other bad things can happen to your heart.

Re: Evolutionary gene loss may explain why only humans are prone to heart attack

#56
post #29
post #2

I like how the headlines explicitly states humans . For yet another study in ... mice. There are other options like dogs and pigs which are much better models for human biology, so if you really want to make a claim about subtle effects of human genetics you need to be as close to a human model as possible. This is entirely ignoring the someone generous leap they make that one single gene mutation is responsible for…

Oh another couch biologist,there's one in every thread.. thanks for all the observations, we really hadn't thought of any of that, you single-handedly salvaged modern biological research !!

Hey, could you please not break the site guidelines like this? Internet forums are certainly full of comments that don't necessarily know about things. If you know more, the thing to do is to share some of what you know so we all can learn—not degrade the quality of the site even further. If you'd take the spirit of this site more to heart, we'd appreciate it.

https://news.ycombinator.com/newsguidelines.html

Re: Evolutionary gene loss may explain why only humans are prone to heart attack

#57

I have the feeling this has much more to do with our self inflicted lifestyle than genetic factors. Maybe no other animal is just that stupid.

Or no other animal is smart enough to be able to produce an abundance of food for the scale of population that we can. And also no other animal has capitalism which motivates actors to make the food supply as addictive as possible.

Re: Evolutionary gene loss may explain why only humans are prone to heart attack

#58
post #2

I like how the headlines explicitly states humans . For yet another study in ... mice. There are other options like dogs and pigs which are much better models for human biology, so if you really want to make a claim about subtle effects of human genetics you need to be as close to a human model as possible. This is entirely ignoring the someone generous leap they make that one single gene mutation is responsible for…

If this withstands scrutiny a chimpanzee study can't be far off, though.

Nah. Primate studies are too expensive, impractical and ethically difficult to justify. Think about the number of subjects you would need for statistical significance ...

Re: Evolutionary gene loss may explain why only humans are prone to heart attack

#59

I have the feeling this has much more to do with our self inflicted lifestyle than genetic factors. Maybe no other animal is just that stupid.

Other animals usually have a lifespan shorter than the time needed for atherosclerosis to be an issue

And the title is a bit incorrect, other animals do suffer with heart issues/"heart attacks" (usually congenital, but due to old age as well)

Re: Evolutionary gene loss may explain why only humans are prone to heart attack

#60

I have the feeling this has much more to do with our self inflicted lifestyle than genetic factors. Maybe no other animal is just that stupid.

> Maybe no other animal is just that stupid. Have you ever owned a cat or dog? My experience is that a percentage of them will overeat unless constantly monitored, eat things that are outright dangerous, etc. What is it that makes humans the stupid ones, here?

I wonder whether or not we should distinguish between domesticated animals and wild ones
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