> Although the research marks a milestone in the search for treatments of type 1 diabetes, it’s important to note that the study involved one one participant, who received a low dose of cells for a short period—not enough for the patient to no longer need to control their blood sugar with injected insulin. An editorial by the journal Nature also says that some independent research groups have failed in their efforts to confirm that Sana’s method provides edited cells with the ability to evade the immune system.
I’ve had T1D for more than 30 years and have seen every headline under the sun with a “cure” always sometime in the next 5 years, so my expectations are properly tempered.
Still excited by it but a long way from clinics handing this out as a solution (if it’s viable).
5 years is modern for a long time. Used to be in the next decades. I've had it for about the same time and about 10 years ago I stopped following all research since it never goes anywhere. I'll wait till they start doing late stage trails to be even interested to read the full report.
The thing is that with such a sample, we don't really know
1. If the effect is real. i.e. had the patient not been given the injection, would his/her condition improve spontaneously.
2. Assuming the effect is real, what are the circumstances that make the treatment work for this person.
Not to be overly dismissive of the good work but it is too early to be optimistic about this given the above and the fact that the results were not replicated out of Sana suggest that there is a lot that we need to work out before this becomes a viable treatment for the masses.
The harms of hyping this up is that readers will get their hopes up and then be disappointed when things don't pan out as do most scientific endeavours. Overtime, readers will learn to distrust anything that is being reported because 90% of which do not translate to real world impact. It is hard to get the nuance that "science takes many many failures and iterations" to the public and the more likely outcome of such reporting is general distrust of science when things don't go the way that is hoped for.
This is very encouraging, but will take a long time to get to any type of usable treatment because these cells are literally made to evade the immune system they run a whole bunch of other risks. Also cell therapies right now are one of the weakest markets in Biotechs due to the level of costs to develop. This is slightly different since it's Allogenic, but the market seems not very invested in cell therapy.
This is great news. Any type of pancreatic function restoration is also potentially good for Type 1.5 (which constitute a sizable chunk of misdiagnosed T2Ds) where the body attacks more slowly (over the course of years) instead of acutely like traditional T1D and so doctors assume it's insulin resistance instead of pancreatic function decline since they both present with the same symptom - hyperglycemia.
It would be nice if fasting insulin and other markers were tested more regularly beyond fasted glucose and a1c, since those can vary for other reasons. Not to mention catching those developing insulin resistance potentially years ahead.
A1c is simple, easy, reliable and readily available. You might not spot the early signs with T2 due to natural variations but it's definitely a good test for T1. Don't rule it out completely.
Because it has been commented over and over "oh, type 2 is because you are overweight"...
> We tend to think of type 2 diabetes as a disease that afflicts people who are overweight. But it can also appear in people with perfectly healthy weights—and be more deadly in them. A study published today in the Journal of the American Medical Association indicates that normal-weight people diagnosed with type 2 diabetes have double the risk of dying from heart disease and other causes than overweight people with diabetes.
(Yes, I know this post is about Type 1... but _all_ of the talk in it when I posted this was about Type 2; and basically blaming the people with it for their condition)
But being overweight is a huge risk factor for developing it and absolutely can contribute to it. I don't how it being more deadly in skinny people detracts from that or is relevant at all.
Because people (who don't know what they're talking about) respond with statements like "you can cure Diabetes Type 2 with diet and exercise", and
- That's false. For _most_ people, you can prevent the symptoms of it with those, but not all. Nor does it _cure_ it, it prevents it from presenting symptoms. The same way that avoiding a food you are allergic to doesn't cure the allergy, it just prevents it from impacting you
- It's insulting to a lot of people that _are_ eating and exercising well, but still battling with Diabetes Type 2
Even if you are overweight... it's NOT easy to lose weight.. especially if you've lost a significant amount of weight in your life. You may well have a really dysfunctional metabolism, and most advice is just bad for this case. Many people actually have to eat more of a reduced menu in order to lose weight.
I'm a pretty big fan of carnivore for this, which has its own detractors, and countering half a century of misinformation of meat and fat isn't the easiest thing in the world. And even then, you may still need some level of supplemental insulin for a long while.
That isn't to say I support general gluttony and laziness... but it isn't that easy, and its even harder when people just assume you aren't even trying or have negativity towards you in general. You try to work out and you get dirty looks and stares... you are eating out (healthy options) but again, dirty looks and stares... it doesn't help.
There have been a lot of advancements on this front too. One promising technique is duodenum resurfacing (DMR). This helps reset some of the insulin sensitivity issues. The one problem we have is that this is a one time low risk procedure compared to selling insulin or GLP-1. Like all of our problems in healthcare, we have a major misalignment in incentives.
Yes, but even lifestyle changes (like a diet low in glycemic load and building muscle) can help reduce many of the harmful effects of type 2 diabetes, even sending it into remission for some people in early stages.
Type 1 is a different story. It’s the lack of natural insulin production (due to a damaged pancreas, autoimmune or other causes), basically the opposite problem to type 2, and no amount of lifestyle changes will replace of need of insulin doses.
I just want to make clear what the other commenter said: type 2 is completely reversible in its early stages. Lose weight, eat a more healthy diet, and you should see your body return to normal.
Unfortunately, there's a serious time limit on this news, as the disease does permanently damage your cells, but in a way that's not terrible. It's probably easier to be shocked by a diagnosis into a lifestyle change than to find out now and undo 30 years of living with daily insulin injections anyways.
I know you put the caveat "mostly" in here but it's important to state that this is not always true.
I was diagnosed with T2 a couple of years ago.
During that time I was cycling 25 miles a day.
After the diagnoses I completely eliminated all carbs from my diet.
My blood sugar was still not under control.
My fasting blood sugar (first thing in the morning, and 18hrs of fasting) was the highest point of the day. (14-18 mmol/L)
I fasted (water only) for 1 week.
no difference.
I was on a bunch of medication, none of it helped.
It wasn't until I started taking a GLP-1 drug that my sugar came under control.
So medication (ozempic) was critical to me getting my blood sugar under control.
Diet didn't fix it. Exercise didn't help.
I've lost ~90lbs since then.
I'd probably have died/gone into a coma if not for GLP-based drugs.
My anecdote does not contradict wide-spread science and medically derived knowledge. But it should help temper the fat and diet shaming that exists in society.
If you lost 90 lbs, you must have been at least 90 lbs overweight. That isn't a little bit of fat. That is a lot of fat. And it takes a lifetime to put on that much fat. You can't really claim that you had proper exercise and diet before you started taking medications. I have seen many episodes of My 600 LB Life and similar shows where the clients and their caretakers swear on their mother's graves that they even eat at all, but that isn't how reality and physics work.
Don't misunderstand, I'm glad they made the GLP-1 drugs, but still, they have for years been reversing Type 2 diabetes through exercise a diet.
Calories in/out is the only reliable way (short of surgery or drugs anyway) to reliably change the size of your body in either direction. Genetics, where you are on the planet, hormones, and your average activity levels tweak things but this remains fundamentally true:
If you eat in a calorie deficit, you will lose weight.
If you eat in a calorie surplus, you will gain weight.
It's not hateful, it's math. If you have a hard time getting your intake down due to life circumstances, addictions, stress, whatever, you have my utmost sympathies and I would do anything I could to help, but I'm not going to bullshit you. If you want to weigh less, you must, over a long period of time, take in fewer calories than you burn in a day. That is how you lose weight in the most nuts-and-bolts way there is.
I'd also like to point out that people don't think about calories when they eat. They are thinking about their hunger. But for 50 years they've been told "carbs and whole grains are good for you". So they eat carbs which spike the blood sugar followed by spiking of insulin. A few minutes later both crash, which makes them hungry and they go back for more food which is carbs.
It is impossible to not overeat with that mindset. First they have to learn that fatty and fibrous foods will make them feel full all day. My go-to comfort food is ice cream. I was thrilled when I discovered https://rebelcreamery.com/ , which they sell at my local grocery stores. I can eat about 700 calories and a bit of psyllium fiber and be full for the whole day. It is the primary way I lost weight.
> But for 50 years they've been told "carbs and whole grains are good for you".
Carbs have replaced fats as the conventional wisdom thing to religiously minimize for a couple of decades now; this is like reading a canned rant that was found in a time capsule from the 1990s.
I guess it matters if a person continues learning throughout their life. Some people decide their book learnin is over at high school, and those people will stay forever behind.
A bit of a tangent, but the biking stuff is not relevant. What matters is your caloric consumption. Biking 25 miles, depending on your weight, is going to burn something like 1300 calories. For some contrast, a 2L bottle of coke has about 800 calories. So treat yourself to a big serving of Coke after (or during) the biking, maybe a fast food burger or whatever, and it's like you're not even biking at all in terms of caloric effect. This is also true with 'sports drinks' which are also loaded with calories which can be really easy to chug when doing cardio intensive work.
And this can easily happen because biking 25 miles is going to send your appetite skyrocketing. This is why working out to lose weight is probable one of the worst ideas imaginable. Working out is a critical part of staying in good health, but it simply has to be paired with a good diet, permanently. In other words you can't work away a bad diet at the gym (or on a bike), it just doesn't work.
If you say that diet did not fix it, but then you lost ~90 lbs, which is a massive weight loss [(1) congratulations, 2) we are becoming used to people losing 200 lbs and 90 is a victim of weight-loss inflation], it looks like the problem was that the diet, which can be defined as a particular way of eating and/or caloric restriction, was not really a diet in the second meaning of the term.
Ozempic helped you lose weight primarily by making you stick to a diet, due to its suppressing effects on appetite.
25 miles of biking is somewhere in the world of 400ish Calories.
If you were doing that and not losing weight, you were eating 400ish excess Calories on average.
That's the equivalent of a single packet of Ramen, or about 4 Oreo cookies. Food is extremely energy dense.
Exercise, especially using efficient means like biking or running or walking, just isn't that effective. You need caloric restriction to make any ground for the majority of people.
>But it should help temper the fat and diet shaming that exists in society.
Why would it? Factually, if Ozempic and similar solved your weight issues, it directly means you were eating "too much" food. People who see that as a personal failing will continue to do so, and will see Ozempic as enabling "weak willed" people, or a crutch for "lesser" people.
It doesn't really affect your point, but biking 25 miles is going to burn more than 400 calories. Probably double or triple that, depending on their weight and the workout intensity.
Most cancer can be prevented and if caught early treated with surgery, chemo, or radiation. No need to look for a cure, those people will probably just keep smoking or eating or exposing themselves to the environment and die anyway.
This is a highly questionable statement. There are myriad reasons for the kinds of DNA copying errors that cause cancer(s), and few are mono-causal. Type-II diabetes is mainly a lifestyle disease and barely existed 50 years ago. That said any treatment or effort to cure Type-II diabetes is laudable, and it's clear that broad societal factors create the conditions for so many people to develop diabetes.
Your misplaced confidence that Type II diabetes is a lifestyle disease for which you can just judge the victim is questionable.
I have never been overweight, I eat healthy (mostly plants, very little refined carbs), and I am active and run 5k regularly. That didn't prevent me from inheriting T2 from both my parents by the time I turned 60.
I'm pretty certain T2 was widespread 50 years ago. We just didn't test for it and people just lost their feet or went blind or had heart attacks as they got old. Was there even an inexpensive, rapid test for HbA1c in 1975?
This study's pretty wild -- but this approach has a major downside that they only mentioned in passing in the actual report in the New England Journal of Medicine (paywalled, unfortunately).
To gene-edit these cells, they had to use a lentivirus vector -- a (limited form of a) class of viruses that notably includes HIV. These viral vectors work by splicing themselves into random places in the host cell's DNA. Which is fine, except that there's a non-zero chance that in the process, the virus will initiate a cancer.
When you combine that with a cell deliberately engineered to hide from the immune system, you have the ticket to a very bad time.
The transgene engineering is totally possible without a viral vector. We engineer cells all the time with recombinase based editing methods for targeted safe harbor insertion of transgenes https://www.nature.com/articles/s41551-024-01227-1. This stuff just permeates through the community slowly.
N=1 study should not have made it into headlines.
> Although the research marks a milestone in the search for treatments of type 1 diabetes, it’s important to note that the study involved one one participant, who received a low dose of cells for a short period—not enough for the patient to no longer need to control their blood sugar with injected insulin. An editorial by the journal Nature also says that some independent research groups have failed in their efforts to confirm that Sana’s method provides edited cells with the ability to evade the immune system.
Despite that, glad to see it in a human subject.
I’ve had T1D for more than 30 years and have seen every headline under the sun with a “cure” always sometime in the next 5 years, so my expectations are properly tempered.
Still excited by it but a long way from clinics handing this out as a solution (if it’s viable).
5 years is modern for a long time. Used to be in the next decades. I've had it for about the same time and about 10 years ago I stopped following all research since it never goes anywhere. I'll wait till they start doing late stage trails to be even interested to read the full report.
The thing is that with such a sample, we don't really know
1. If the effect is real. i.e. had the patient not been given the injection, would his/her condition improve spontaneously.
2. Assuming the effect is real, what are the circumstances that make the treatment work for this person.
Not to be overly dismissive of the good work but it is too early to be optimistic about this given the above and the fact that the results were not replicated out of Sana suggest that there is a lot that we need to work out before this becomes a viable treatment for the masses.
The harms of hyping this up is that readers will get their hopes up and then be disappointed when things don't pan out as do most scientific endeavours. Overtime, readers will learn to distrust anything that is being reported because 90% of which do not translate to real world impact. It is hard to get the nuance that "science takes many many failures and iterations" to the public and the more likely outcome of such reporting is general distrust of science when things don't go the way that is hoped for.
This is very encouraging, but will take a long time to get to any type of usable treatment because these cells are literally made to evade the immune system they run a whole bunch of other risks. Also cell therapies right now are one of the weakest markets in Biotechs due to the level of costs to develop. This is slightly different since it's Allogenic, but the market seems not very invested in cell therapy.
This is great news. Any type of pancreatic function restoration is also potentially good for Type 1.5 (which constitute a sizable chunk of misdiagnosed T2Ds) where the body attacks more slowly (over the course of years) instead of acutely like traditional T1D and so doctors assume it's insulin resistance instead of pancreatic function decline since they both present with the same symptom - hyperglycemia.
It would be nice if fasting insulin and other markers were tested more regularly beyond fasted glucose and a1c, since those can vary for other reasons. Not to mention catching those developing insulin resistance potentially years ahead.
A1c is simple, easy, reliable and readily available. You might not spot the early signs with T2 due to natural variations but it's definitely a good test for T1. Don't rule it out completely.
There are also loads of tests for antibodies now; some are even (gasp) free for qualifying people. More here: https://www.breakthrought1d.org/early-detection/#screening-o...
BTW Covid harms pancreatic cells that produce insulin via autoimmune mechanisms.
That's really exciting news. There's a couple non-immunosuppressed solutions being tested, hopefully one pans out.
Yep, I think vertex is one of the companies trying to tackle an encapsulated set of insulin producing cells.
Neat stuff!
https://archive.is/tBrzc
This seems like it’s on the right track. Finally something that doesn’t require immunosuppressants.
It was in people and not mice too. So many of these headlines are in cell cultures or mice.
Because it has been commented over and over "oh, type 2 is because you are overweight"...
> We tend to think of type 2 diabetes as a disease that afflicts people who are overweight. But it can also appear in people with perfectly healthy weights—and be more deadly in them. A study published today in the Journal of the American Medical Association indicates that normal-weight people diagnosed with type 2 diabetes have double the risk of dying from heart disease and other causes than overweight people with diabetes.
- https://www.health.harvard.edu/blog/diabetes-can-strike-hard...
(Yes, I know this post is about Type 1... but _all_ of the talk in it when I posted this was about Type 2; and basically blaming the people with it for their condition)
type 2 is more closely associated with genetics than type 1
https://diabetes.org/about-diabetes/genetics-diabetes
But being overweight is a huge risk factor for developing it and absolutely can contribute to it. I don't how it being more deadly in skinny people detracts from that or is relevant at all.
Because people (who don't know what they're talking about) respond with statements like "you can cure Diabetes Type 2 with diet and exercise", and
- That's false. For _most_ people, you can prevent the symptoms of it with those, but not all. Nor does it _cure_ it, it prevents it from presenting symptoms. The same way that avoiding a food you are allergic to doesn't cure the allergy, it just prevents it from impacting you
- It's insulting to a lot of people that _are_ eating and exercising well, but still battling with Diabetes Type 2
It's wrong and it's insulting.
Even if you are overweight... it's NOT easy to lose weight.. especially if you've lost a significant amount of weight in your life. You may well have a really dysfunctional metabolism, and most advice is just bad for this case. Many people actually have to eat more of a reduced menu in order to lose weight.
I'm a pretty big fan of carnivore for this, which has its own detractors, and countering half a century of misinformation of meat and fat isn't the easiest thing in the world. And even then, you may still need some level of supplemental insulin for a long while.
That isn't to say I support general gluttony and laziness... but it isn't that easy, and its even harder when people just assume you aren't even trying or have negativity towards you in general. You try to work out and you get dirty looks and stares... you are eating out (healthy options) but again, dirty looks and stares... it doesn't help.
it's one factor but weight and diet isn't the only component
Type 2, they need to solve type 2.
If GLP-1 Drugs Are Good for Everything, Should We All Be on Them? - https://news.ycombinator.com/item?id=44830685 - August 2025
There have been a lot of advancements on this front too. One promising technique is duodenum resurfacing (DMR). This helps reset some of the insulin sensitivity issues. The one problem we have is that this is a one time low risk procedure compared to selling insulin or GLP-1. Like all of our problems in healthcare, we have a major misalignment in incentives.
isn't that what GLP1s are for (before you get full blown type 2)
Yes, but even lifestyle changes (like a diet low in glycemic load and building muscle) can help reduce many of the harmful effects of type 2 diabetes, even sending it into remission for some people in early stages.
Type 1 is a different story. It’s the lack of natural insulin production (due to a damaged pancreas, autoimmune or other causes), basically the opposite problem to type 2, and no amount of lifestyle changes will replace of need of insulin doses.
I just want to make clear what the other commenter said: type 2 is completely reversible in its early stages. Lose weight, eat a more healthy diet, and you should see your body return to normal.
Unfortunately, there's a serious time limit on this news, as the disease does permanently damage your cells, but in a way that's not terrible. It's probably easier to be shocked by a diagnosis into a lifestyle change than to find out now and undo 30 years of living with daily insulin injections anyways.
If you treat sugar as an addiction you can solve it yourself.
Nobody had thought of this wow
We were here, at the moment of inspiration
Why? Type 2 can be mostly prevented and if caught early enough treated with diet and exercise.
If you solve type 2 they’ll just eat themselves into a new episode again
I know you put the caveat "mostly" in here but it's important to state that this is not always true.
I was diagnosed with T2 a couple of years ago. During that time I was cycling 25 miles a day. After the diagnoses I completely eliminated all carbs from my diet. My blood sugar was still not under control. My fasting blood sugar (first thing in the morning, and 18hrs of fasting) was the highest point of the day. (14-18 mmol/L) I fasted (water only) for 1 week. no difference.
I was on a bunch of medication, none of it helped.
It wasn't until I started taking a GLP-1 drug that my sugar came under control.
So medication (ozempic) was critical to me getting my blood sugar under control. Diet didn't fix it. Exercise didn't help.
I've lost ~90lbs since then. I'd probably have died/gone into a coma if not for GLP-based drugs.
My anecdote does not contradict wide-spread science and medically derived knowledge. But it should help temper the fat and diet shaming that exists in society.
If you lost 90 lbs, you must have been at least 90 lbs overweight. That isn't a little bit of fat. That is a lot of fat. And it takes a lifetime to put on that much fat. You can't really claim that you had proper exercise and diet before you started taking medications. I have seen many episodes of My 600 LB Life and similar shows where the clients and their caretakers swear on their mother's graves that they even eat at all, but that isn't how reality and physics work.
Don't misunderstand, I'm glad they made the GLP-1 drugs, but still, they have for years been reversing Type 2 diabetes through exercise a diet.
Calories in/out is the only reliable way (short of surgery or drugs anyway) to reliably change the size of your body in either direction. Genetics, where you are on the planet, hormones, and your average activity levels tweak things but this remains fundamentally true:
If you eat in a calorie deficit, you will lose weight.
If you eat in a calorie surplus, you will gain weight.
It's not hateful, it's math. If you have a hard time getting your intake down due to life circumstances, addictions, stress, whatever, you have my utmost sympathies and I would do anything I could to help, but I'm not going to bullshit you. If you want to weigh less, you must, over a long period of time, take in fewer calories than you burn in a day. That is how you lose weight in the most nuts-and-bolts way there is.
I'd also like to point out that people don't think about calories when they eat. They are thinking about their hunger. But for 50 years they've been told "carbs and whole grains are good for you". So they eat carbs which spike the blood sugar followed by spiking of insulin. A few minutes later both crash, which makes them hungry and they go back for more food which is carbs.
It is impossible to not overeat with that mindset. First they have to learn that fatty and fibrous foods will make them feel full all day. My go-to comfort food is ice cream. I was thrilled when I discovered https://rebelcreamery.com/ , which they sell at my local grocery stores. I can eat about 700 calories and a bit of psyllium fiber and be full for the whole day. It is the primary way I lost weight.
> But for 50 years they've been told "carbs and whole grains are good for you".
Carbs have replaced fats as the conventional wisdom thing to religiously minimize for a couple of decades now; this is like reading a canned rant that was found in a time capsule from the 1990s.
I guess it matters if a person continues learning throughout their life. Some people decide their book learnin is over at high school, and those people will stay forever behind.
A bit of a tangent, but the biking stuff is not relevant. What matters is your caloric consumption. Biking 25 miles, depending on your weight, is going to burn something like 1300 calories. For some contrast, a 2L bottle of coke has about 800 calories. So treat yourself to a big serving of Coke after (or during) the biking, maybe a fast food burger or whatever, and it's like you're not even biking at all in terms of caloric effect. This is also true with 'sports drinks' which are also loaded with calories which can be really easy to chug when doing cardio intensive work.
And this can easily happen because biking 25 miles is going to send your appetite skyrocketing. This is why working out to lose weight is probable one of the worst ideas imaginable. Working out is a critical part of staying in good health, but it simply has to be paired with a good diet, permanently. In other words you can't work away a bad diet at the gym (or on a bike), it just doesn't work.
Exercise is relevant, too. It's not just obesity and it's not just diet.
(And genes matter, too.)
If you say that diet did not fix it, but then you lost ~90 lbs, which is a massive weight loss [(1) congratulations, 2) we are becoming used to people losing 200 lbs and 90 is a victim of weight-loss inflation], it looks like the problem was that the diet, which can be defined as a particular way of eating and/or caloric restriction, was not really a diet in the second meaning of the term.
Ozempic helped you lose weight primarily by making you stick to a diet, due to its suppressing effects on appetite.
So very rough estimate:
25 miles of biking is somewhere in the world of 400ish Calories.
If you were doing that and not losing weight, you were eating 400ish excess Calories on average.
That's the equivalent of a single packet of Ramen, or about 4 Oreo cookies. Food is extremely energy dense.
Exercise, especially using efficient means like biking or running or walking, just isn't that effective. You need caloric restriction to make any ground for the majority of people.
>But it should help temper the fat and diet shaming that exists in society.
Why would it? Factually, if Ozempic and similar solved your weight issues, it directly means you were eating "too much" food. People who see that as a personal failing will continue to do so, and will see Ozempic as enabling "weak willed" people, or a crutch for "lesser" people.
It doesn't really affect your point, but biking 25 miles is going to burn more than 400 calories. Probably double or triple that, depending on their weight and the workout intensity.
Most cancer can be prevented and if caught early treated with surgery, chemo, or radiation. No need to look for a cure, those people will probably just keep smoking or eating or exposing themselves to the environment and die anyway.
> Most cancer can be prevented
This is a highly questionable statement. There are myriad reasons for the kinds of DNA copying errors that cause cancer(s), and few are mono-causal. Type-II diabetes is mainly a lifestyle disease and barely existed 50 years ago. That said any treatment or effort to cure Type-II diabetes is laudable, and it's clear that broad societal factors create the conditions for so many people to develop diabetes.
Your misplaced confidence that Type II diabetes is a lifestyle disease for which you can just judge the victim is questionable.
I have never been overweight, I eat healthy (mostly plants, very little refined carbs), and I am active and run 5k regularly. That didn't prevent me from inheriting T2 from both my parents by the time I turned 60.
I'm pretty certain T2 was widespread 50 years ago. We just didn't test for it and people just lost their feet or went blind or had heart attacks as they got old. Was there even an inexpensive, rapid test for HbA1c in 1975?
If your read carefully, you'll note that I said largely. There is clearly a genetic component and non-lifestyle environmental factors.
You don't need to go back to the 1970s even. In 1990 fewer than 5% of Americans had Type II diabetes and now that number probably exceeds 15%.
A lot of them are probably not copying errors but errors in which parts of the genome are turned on and which parts are turned off.
(Agree entirely about type 2 diabetes.)
Sure DNA methylation can also just happen for any number of reasons.
Also a lot of environmental factors that can cause cancer are out of your control if you live in an urban area.
The cancer rates are relatively comparable in urban vs rural zip coeds in the US[1].
[1] https://pubmed.ncbi.nlm.nih.gov/38801414/
This study's pretty wild -- but this approach has a major downside that they only mentioned in passing in the actual report in the New England Journal of Medicine (paywalled, unfortunately).
To gene-edit these cells, they had to use a lentivirus vector -- a (limited form of a) class of viruses that notably includes HIV. These viral vectors work by splicing themselves into random places in the host cell's DNA. Which is fine, except that there's a non-zero chance that in the process, the virus will initiate a cancer.
When you combine that with a cell deliberately engineered to hide from the immune system, you have the ticket to a very bad time.
One would probably engineer these cells with a killswitch, such as doxycycline induced Caspase9 https://pmc.ncbi.nlm.nih.gov/articles/PMC1895037/.
The transgene engineering is totally possible without a viral vector. We engineer cells all the time with recombinase based editing methods for targeted safe harbor insertion of transgenes https://www.nature.com/articles/s41551-024-01227-1. This stuff just permeates through the community slowly.
Just sent this to my son, seems legitimately promising