If I asked you to picture birth control, what pops into your brain?
口服避孕药 避孕贴 宫内避孕器 或者是避孕线？
The pill, the patch, IUDs, or maybe hormonal implants?
然鹅 以上这些东西都是给女人用的 摊手
But the thing is, all these options are for biosex females.
而对于男性 你就只能用杜蕾斯这类套套啦啦 要么就进行输精管切除手术
For biosex males, there’s really only condoms and vasectomies, where a surgeon shuts the
vas deferens tubes that let sperm travel up and out from the testicles.
虽然已经安全的进行过几次实验研究 希望能够达到可逆男性避孕 然鹅
Even though there’s been a bit of research on safe, reversible male birth control, no
product has ever made it out of the lab.
And this week in the journal Basic and Clinical Andrology, a group of scientists announced
some progress on a relatively new male contraceptive called Vasalgel.
Vasalgel is a sticky polymer gel that’s injected into the vas deferens tubes, physically
blocking sperm so it can’t swim up and mix with the semen.
Since semen is still being made, all the sex and fluid stuff works the same.
但是 不射精也就不会受精 当然你也不会有意外之宝
But no sperm means no fertilization, and no pregnancy.
It’s also designed to be a reversible contraceptive, so scientists can theoretically break down
the gel and flush it out with a second injection of a sodium bicarbonate solution.
Plain old baking soda!
Before trying this contraceptive on humans, scientists have been testing its safety and
effectiveness in animals, like rats and rabbits, who are known for having lots of sex.
And this new study involved injecting Vasalgel into 16 adult male rhesus monkeys at the California
National Primate Research Center.
They were generally healthy after the treatment and went back to their monkey lives, interacting
and mating with fertile females when they were housed together.
结果显示 即使有的雄猴与雌猴同居长达两年之久 都没有一只猴子
And even though some were continuously living with females for 2 entire years, not one fathered
Even with that 100% success rate, Vasalgel is a long way from being safe and ready to
go in humans.
在该项大研究里 十六只猴子的研究并不算大型研究 并且它们显示出一定副作用
Sixteen monkeys isn’t that big of a big study, and there were still some side-effects.
在一只猴子的手术中 在其中一边 凝胶没有正确注射
During one monkey’s surgery, the gel wasn’t injected properly on one side, so the researchers
ended up giving him a partial vasectomy.
还有一只猴子是有了一个精子肿瘤 并且会疼痛 该肿瘤主要是由于
Another developed a sperm granuloma, which is basically a lump of sperm outside the vas
deferens that could become painful.
But the researchers looked at other rhesus monkey health data they had collected, too,
and found that sperm granulomas seemed to be more common in monkeys with vasectomies
than in the group with Vasalgel.
Finally, this particular study didn’t try flushing out the Vasalgel, so we still don’t
know how reversible it is in primates.
So there’s still a ton more work to do before Vasalgel becomes a widespread birth control
option, but it’s off to a promising start.
Even though animal sex is interesting, all species reproduce in one way or another.
You know what’s really weird?
水螅——一种黏糊糊的管状淡水动物 不是传说中的九头蛇或是Marvel villain
And hydra – the squishy tube-shaped freshwater animal, not the mythological sea serpent or
Marvel villain – are really, really good at it.
Even if you chop them into tiny, shapeless chunks of tissue, they can regrow in just
——就是再长出触须 嘴 和黏糊糊的脚
two days – complete with tentacles, a mouth, and a sticky little foot.
This superpower raises a bunch of questions, though, like: how can a tissue chunk know
该在哪里长 长多少 而不会长成一种有好多触须或是三颗头的
how much to regrow and where, without becoming a weird frankenblob with extra tentacles and
Well, researchers from the Israel Institute of Technology published a study in Cell Press
this week, which looked at how important the tissue’s physical structure is for regeneration.
Hydra have thin, parallel actomyosin fibers running throughout their body, like our muscle tissue.
They can contract these fibers to wiggle around, but it turns out that the alignment of these
fibers is really important to help chopped-up tissue reform the right way.
See, hydra bodies are really simple: one head and one foot lined up along a single body axis.
And regeneration starts pretty simply too — when a tissue chunk twists and folds into
a hollow ball called a spheroid.
The alignment of actomyosin fibers in the spheroid lays out a structure that gets inherited
throughout the new hydra’s body.
So the researchers wanted to test how different tissue chunk shapes formed spheroids, and
how that affects regeneration.
Because it can get real bad, real quickly.
Square tissue chunks folded really well, because the actomyosin fibers were stable and aligned,
and the outer edges were flexible and could follow those fibers’ lead.
On the other hand, slices of hydra shaped like closed rings didn’t fold so well, and
formed spheroids with different regions of actomyosin aligned in different ways.
So these regenerated hydra were more deformed, and usually had multiple body axes – like
two mouths and two feet.
Open rings did even worse – that extra cut made figuring out actomyosin alignment even trickier.
But here’s the thing: when the researchers threaded thin platinum wires into these ring-shaped
fragments, they were more likely to regenerate correctly, and do it faster – maybe because
the actomyosin fibers had more of a guide.
This new research supports the idea that it’s not just chemical signals that matter in growth
and development, because physical forces influence cells in lots of ways too.
And even though hydra regeneration is a little more extreme, it’s similar to how we humans
heal wounds and develop as embryos.
So there’s a lot we can learn about ourselves from these squishy little tubes.
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Thank you especially to our President of Space SR Foxley.
Thank you, SR!
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