{"id":26,"date":"2011-05-27T10:25:33","date_gmt":"2011-05-27T15:25:33","guid":{"rendered":"http:\/\/genotopia.peachpuff-wolverine-566518.hostingersite.com\/?p=26"},"modified":"2011-07-13T16:50:50","modified_gmt":"2011-07-13T16:50:50","slug":"end-times","status":"publish","type":"post","link":"https:\/\/scienceblog.com\/genotopia\/26\/end-times\/","title":{"rendered":"End Times (The Telos of Telomeres)"},"content":{"rendered":"

For Aristotle, both ethics and politics flowed from the telos, the end or purpose of all things. In what may be record time for translating Nobel Prize benchwork to biotech snake oil, telomeres are the latest rage in high-tech diagnostics. Several startups are now pitching them as a way to tell your \u201cbiological age,\u201d a new health metric that is as baffling as it is troubling.[1]<\/a><\/p>\n

<\/a>The 2009 Physiology or Medicine prize went \u201cfor the discovery of how chromosomes are protected by telomeres and the enzyme telomerase.\u201d Telomeres, as I wrote in 1991, are like aglets\u2014the plastic tips on the ends of your shoelaces\u2014for your chromosomes. They\u2019re long stretches of repetitive DNA that essentially keep chromosome ends from unraveling. The thing is, unlike shoelaces, chromosomes duplicate themselves. They have to\u2014otherwise half your cells would have no genes. And every time they do, because of one of those ubiquitous little design flaws that show there\u2019s Nobody Home Upstairs, your telomeres get a tiny bit shorter. The telomere is therefore a sort of clock, ticking down the mitoses until a cell reaches the Hayflick Limit, at which point basically chromosomal Fukushima occurs. Telomerase counteracts that shortening in certain cell types, making those cells effectively immortal.<\/p>\n

There have always been a few people who find it irresistible to think that cellular<\/em> aging determines organismal<\/em> aging. Seems logical, right? I mean, we all know an organism is made of cells. When you get old, doesn\u2019t it have to be because your cells are getting old?<\/p>\n

Well, sort of, sometimes, in some cases, but not in any simple way. Senescence is an incredibly complex process\u2014and nowhere more so than in humans, naturally\u2014and it mostly happens independently of your telomere length. It\u2019s certain that your telomeres will be shorter when you\u2019re old than they were when you were young, but old people can have long telomeres, and young people can have short ones. For that matter, short people can have old telomeres.<\/p>\n

Further, cellular immortality is a mixed blessing, to say the least. On the one hand, slowing cellular senescence could in principle forestall certain degrading diseases of disintegration. On the other, there\u2019s already a name for immortalized cells: cancer.<\/p>\n

Anyway, cellular and organismal aging operate on different time scales, and the latter involves a lot of processes that have nothing to do with the former. To equate them is to confuse variation at two different levels\u2014the same sort of error found in claims that racial differences in IQ result from genetics rather than systematic discrimination.[2]<\/a><\/p>\n

<\/a>That neat little fallacy is the foundation of the business plan at several new biotech companies, in Spain, Houston, and of course, in Menlo Park, CA. They claim to be able to take a few of your cells, open them like sacrificial goats, spread out their entrails, and tell you how old you \u201creally\u201d are. These new longevity companies claim to only be raising a warning flag, pointing you toward medical treatments you might want to consider.<\/p>\n

A century ago, the Life Extension Institute had a similar model. The New York-based company offered medical exams, denying that they were offering any medical treatment<\/em>. They pitched their product directly to individuals, but their biggest customers were employers and the many life insurance companies springing up in the Progressive Era. They eventually shut down in the wake of numerous lawsuits and accusations of fraud and misrepresentation. And LEI’s cofounder, Irving Fisher, went on to found the American Eugenics Society.[3]<\/a><\/p>\n

<\/a>For a few hundred bucks, these new companies will give you one-stop diagnostic shopping. With one measurement, they claim, they can tell you all sorts of things about your overall health and well-being. You even get to pick your metaphor: you either get a \u201cwake-up call\u201d about how fast you are really aging, or you can have your \u201ccheck engine light\u201d checked, according to spokesmen for the companies quoted in the Times<\/em> article. The check-engine light in my car goes on for free, but after that I guess that in both cases it means a lot of expensive, computer-based diagnostics, and a lot of fervent hopes that all you did was pop a circuit-breaker.<\/p>\n

Some of the scientists involved show a refreshing degree of candor. Jerry Shay, of UT Southwestern and on the board of the company Life Length (didn\u2019t I get email from Nigeria about a similar product the other day?), acknowledged that although they won\u2019t tell anyone how long they will live, insurance companies might want this information \u201cto set rates or deny coverage.\u201d In other words, they\u2019re perfectly happy to sell the actuarial illusion that they can tell anyone how long they will live.<\/p>\n

A Spanish telomerista<\/em>, Maria Blasco, said the telomere test might prove helpful to people \u201cespecially keen on knowing how healthy they are.\u201d Never mind the deeply problematic notion of playing to the fears of bored upper middle-class hypochondriacs; outside of a couple of risk factors for very specific and rare diseases, no one has any idea what this tells you about how healthy you are. But hard data and actual products tend to be hell on stock prices anyway.<\/p>\n

Everyone got that? They\u2019re telling<\/em> us this is a scam. Now look, I am not saying these folks are dishonest, or even cynical. I think they are a bunch of basically honest scientists swayed by the allure of high-tech translational biomedicine. It\u2019s the scientific version of the American Dream. And it comes with the always-handy Biomedical Moral Pass. It\u2019s a great example of overfunded, overhyped science that benefits corporations and stockholders but may well do patients more harm than good.<\/p>\n

The thing I wonder about most, though, is this idea of \u201cbiological age.\u201d Apparently, the age I think<\/em> I am\u2014which I have until now naively correlated to the number of birthdays I\u2019ve had, and never mind\u2014is now \u201cnon-biological.\u201d It\u2019s like an acoustic guitar. There was no such thing as an acoustic guitar until the electric guitar was invented. All<\/em> guitars were acoustic. Are there now multiple kinds of time\u2014chronlogical, biological, and who knows what else\u2014where I can be getting older in one dimension and younger in another? Have these biologists have actually reinvented time<\/em>?<\/p>\n

Or have they figured out what time really is<\/em>? Is my chronological age now merely a figment, a simulacrum\u2014a fictive representation of some supra-biological horological process? If so, I don\u2019t think I like where this is going. We\u2019re not headed down the sunny, leafy lane of, \u201cYou\u2019re only as old as you feel! Have another bran muffin and go enjoy the morning.\u201d This is more like the gray, trash-strewn alley of, \u201cYou poor dumb bastard. You only think<\/em> you want to go to that punk show downtown this weekend. Sit down, shut up, and drink your Mylanta.\u201d<\/p>\n

It sounds like the beginning of the end.<\/p>\n

\n
\n
[1]<\/a> Andrew Pollack, \u201cA blood test offers clues to longevity,\u201d 2011-05-18 (http:\/\/nyti.ms\/iIO3gv).<\/div>\n
[2]<\/a> In other words, conflating within-group and between-group variation. Whatever IQ is, it is highly heritable. But heritability is a measure of variation within <\/em>a group. The heritability of IQ is different for different groups under different conditions. It simply cannot be used as a measure of how \u201cinnate\u201d a trait is.<\/div>\n
[3]<\/a> I write about Fisher in chapter 2 of my forthcoming book, \u201cA Science of Human Perfection.\u201d<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

For Aristotle, both ethics and politics flowed from the telos, the end or purpose of all things. In what may be record time for translating Nobel Prize benchwork to biotech snake oil, telomeres are the latest rage in high-tech diagnostics. Several startups are now pitching them as a way to tell your \u201cbiological age,\u201d a … Read more<\/a><\/p>\n","protected":false},"author":19,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[1],"tags":[17,27,30,50,86,92,94,99,104],"class_list":["post-26","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-chromosome-ends","tag-end","tag-enzyme-telomerase","tag-hayflick-limit","tag-repetitive-dna","tag-snake-oil","tag-sort","tag-telomere-length","tag-time"],"yoast_head":"\nEnd Times (The Telos of Telomeres) - Genotopia<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/scienceblog.com\/genotopia\/26\/end-times\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"End Times (The Telos of Telomeres)\" \/>\n<meta property=\"og:description\" content=\"For Aristotle, both ethics and politics flowed from the telos, the end or purpose of all things. 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