• 🍉 DrRedOctopus 🐙🍉@lemmy.world
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    25 days ago

    I think there was a similar case, but about the mother. The courts took her baby and she was on trial for kidnapping.

    Eventually a geneticists saw it on the news and suggested she got tested again using DNA samples from other parts of her body and they found out she also was a chimera.

    Some racism was involved as she was working class and black, so the courts were just looking for a reason to take her baby and throw her ass in jail…

    • dkppunk@piefed.social
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      25 days ago

      I remember that one, it was the first time I heard of this scenario. It really sucks for folks involved, but it is kind of interesting too.

    • MisterFrog@lemmy.world
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      25 days ago

      You’d think they’d change DNA test methodologies so this sort of thing doesn’t happen again

    • arschfidel@discuss.tchncs.de
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      25 days ago

      Yes, it was the case of Lydia Fairchild

      From Wikipedia

      Fairchild stood accused of fraud by either claiming benefits for other people’s children, or taking part in a surrogacy scam, and records of her prior births were put similarly in doubt. Prosecutors called for her two children to be taken away from her, believing them not to be hers. As time came for her to give birth to her third child, the judge ordered that an observer be present at the birth, ensure that blood samples were immediately taken from both the child and Fairchild, and be available to testify. Two weeks later, DNA tests seemed to indicate that she was also not the mother of that child.

      A breakthrough came when her defense attorney,[1] Alan Tindell, learned of Karen Keegan, a chimeric woman in Boston, and suggested a similar possibility for Fairchild and then introduced an article in the New England Journal of Medicine about Keegan.[2][3] He realized that Fairchild’s case might also be caused by chimerism. As in Keegan’s case, DNA samples were taken from members of the extended family. The DNA of Fairchild’s children matched that of Fairchild’s mother to the extent expected of a grandmother. They also found that, although the DNA in Fairchild’s skin and hair did not match her children’s, the DNA from a cervical smear test did match. Fairchild was carrying two different sets of DNA, the defining characteristic of chimerism.

  • AllNewTypeFace@leminal.space
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    25 days ago

    Apparently this is more common with cats. If you see a cat with two different coat patterns, either divided down the middle or along the neck (as if they only had spare parts left at the cat factory), they may also be a chimera.

    • very_well_lost@lemmy.world
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      25 days ago

      I wonder… is this more common in all animals that have average litter size >= 2? Or is there something else special to cats that explains this phenomenon?

      • Derpenheim@lemmy.zip
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        25 days ago

        In-utero growth rate + chromosome counts play a big role. I admit, ashamedly, that I have largely forgotten the reason they matter, but they do.

        Source, trust me bro

    • LurkingLuddite@piefed.social
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      25 days ago

      Half and half chimera is just the more unique variant, iirc, at least for humans. The more common type would just look splotchy if the different parts even happen to color differently. The patterns usually follow Blaschko’s lines but don’t have to.

      There are also more basic forms where people will just have certain body parts with different DNA, like an extra blood type or other less consequential things.

  • TheLazyNerd@europe.pub
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    25 days ago

    There was a similar case of a woman who absorbed her twin brother in the womb. Only a small patch of cheek had her brothers DNA, but that is exactly where DNA is taken from when they want to take a DNA sample. This was discovered when she took a DNA test which came up as male.

  • saimen@feddit.org
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    25 days ago

    Why does this make DNA scary? I think it’s awesome that our understanding of DNA makes us able to unravel things like this.

    • bstix@feddit.dk
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      25 days ago

      Imagine your dead twin using your penis to impregnate your wife with his DNA.

      • Alkali@lemmy.ml
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        24 days ago

        “You may have defeated me in the womb brother, but I impregnated your wife. I win.”

        • Naz@sh.itjust.works
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          24 days ago

          The child is then born, gets to around 18 years old and challenges the father to a boxing match:

          “Brother, it is me, beyond the grave! I have come to reclaim my rightful place in the world, and seek my vengeance!”

  • kryptonianCodeMonkey@lemmy.world
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    25 days ago

    Another fun-ish, kinda fucked up, weird story… There’s a woman, Henrietta Lacks, who had a biopsy for her cervical cancer in January of 1951 before passing in October of that year. These cells were found to be incredibly resilient and quick to replicate. Most cells only lasted a few days before dying, but hers seemed to be functionally immortal under controlled lab conditions.

    So, unbeknownst to her as consent wasnt required for such things at the time, her cancer cells were cultured and grown into large samples to be used in research. Those samples were split off and passed off to other labs. They’ve since spread around the entire world for a ton of research and commercial purposes.

    They were used in the development of the polio vaccine, for example, as well as having been used in research on cancer (obviously), AIDS, the effects of radiation and toxic materials, gene mapping, etc. They are used to test safety of cosmetics as well. Approximately 11,000 patents involve these specific cancer cells.

    In the 1970s, there was an incident where these cells contaminated other cell cultures, so the researchers needed DNA samples from the Henrietta’s family to differentiate her cells from the others. This is the first time anyone in her family learned that her cells had been used in research at all, let alone that her cells were being cloned and used in research and commercial product development across the entire world. It became a legal issue after this, and after a couple decades of litigation, it made it to the Supreme Court of California where they ruled that “discarded biological materials” is no longer ones property and could be commercialized freely. They continue to occasionally fight against aspects of her cells’ usage, and there are health privacy concerns for her family as well, but results have been mixed for them.

    Henrietta the person died in 1951 at age 31, but her immortal cancer cells which still contain her full DNA sequence continue to live to this day, 75 years later. One source claims that as much as 50 million metric tons of tissue has been generated from these cells.

    • mycodesucks@lemmy.world
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      25 days ago

      HeLa is extremely interesting, but still requires humans to cultivate her cells.

      Canine transmissible venereal tumor however, is an immortal, contagious dog tumor from a dog thousands of years ago that evolved into its own lifeform - a sexually transmitted parasitic cancer - that has continued to this day to spread from host to host. Yet, genetically, it is still “dog”.

      Anyway, this is my answer when the job interviewer asks me about long-term goals.

    • A Wild Mimic appears!@lemmy.dbzer0.com
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      25 days ago

      I worked with HeLa cells as a molecular biology student. The ethics weren’t a great look, and I’m happy that today there has to be informed consent for stuff like that.

      Without having an immortalized cell line like this genetics would have taken even longer to get going tho, and she’s actually one of the few people whose genes will be preserved for near eternity. Creepy, but it’s closer to actual immortality than any of us will ever be.

    • 14th_cylon@lemmy.zip
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      25 days ago

      In the 1970s, there was an incident where these cells contaminated other cell cultures, so the researchers needed DNA samples from the Henrietta’s family to differentiate her cells from the others.

      I don’t understand. First, what was the point? I doubt there was a way to split the sample attacked by a cancer cells, they probably weren’t going to recalibrate the transporter and untuvix them.

      Second, weren’t there thousands of the copies of the sample? Why wouldn’t they compare it to one of them, instead of bothering the family?

        • The_v@lemmy.world
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          25 days ago

          They detected allozymes (differences in proteins) by electrophoresis in the 1970’s.

          This could tell the difference between species and maybe if they were lucky large family groups. It wasn’t as exact as using DNA.

    • Notyou@sopuli.xyz
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      25 days ago

      I think they are saying this dude is so cuck that he is raising his wife and non-existent brothers child.

  • bedwyr@piefed.ca
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    25 days ago

    There was a woman who went to prison for this, her chimera baby’s dna contradicted her story, I think to get public assistance of some kind, and the dna test convinced the state assholes she was lying and they sent her to prison, I think some researchers exonerated her eventually.

    • Whats_your_reasoning@lemmy.world
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      25 days ago

      Are you thinking of Lydia Fairchild? In her case she wasn’t sent to prison. However, her two children were taken from her and placed in foster care. Lawyers had refused to represent her at first, due to the belief that DNA evidence is too strong to fight. On the plus side, she became pregnant again. So a court officer was present during her third child’s birth.

      Despite being at the birth and witnessing blood draws from both mother and child, the court still claimed she was being untruthful somehow. Thankfully, that birth and its evidence were peculiar enough to attract a lawyer to finally represent her. Only after that did the investigation into potential chimerism arise.

      More info here - https://embryo.asu.edu/pages/case-lydia-fairchild-and-her-chimerism-2002

      • bedwyr@piefed.ca
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        25 days ago

        Might be I just heard it on a podcast, Poor Historians, Misadventures in Medical History, and I may have gotten the story wrong.

      • WiredBrain@lemmy.ca
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        25 days ago

        Because they don’t know the limits of their tools and were convinced they’re infallible, and as a result an innocent woman was punished by the state. Just a guess.

        • minorkeys@sh.itjust.works
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          25 days ago

          Nobody knows the limit of their tools until those limits are known. Where did you decide they thought they were infallible? They followed the law they have, as is their job. Justice is not perfect, we don’t have all the answers, jumping to such vicious conclusions speaks more about you than them. The entire incident, and her successful appeal after further investigation, was like a year. Nobody threw the woman into prison for a decade or something. Seriously, people are so reactionary.

          • lad@programming.dev
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            25 days ago

            Nobody knows the limit

            I’m not sure, but let’s say that’s true. They usually also don’t care to know the limits. Another interesting case is Patricia Stallings (emphasis mine):

            an American woman who was wrongfully convicted of murder after the death of her son Ryan on September 7, 1989. Because testing seemed to indicate an elevated level of ethylene glycol in Ryan’s blood, authorities suspected antifreeze poisoning, and arrested Stallings the next day. She was convicted of murder in early 1991, and sentenced to life in prison.

            Stallings gave birth to another child while incarcerated awaiting trial; this next child was diagnosed with methylmalonic acidemia (MMA), a rare genetic disorder that can mimic antifreeze poisoning. Prosecutors initially did not believe that the sibling’s diagnosis had anything to do with Ryan’s case. Stallings’ lawyer was forbidden from producing available evidence as proof of the possibility. After a professor in biochemistry and molecular biology had some of Ryan’s blood samples tested, he was able to prove that the child had also died from MMA, and not from ethylene glycol poisoning.

        • minorkeys@sh.itjust.works
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          25 days ago

          If the state has good reason to believe someone had abducted children, I would want them to intervene, would you not?

          • LwL@lemmy.world
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            25 days ago

            If no one is missing those children, that’s not good reason to believe she kidnapped them at all. I want the children to be happy, and regardless of genetics taking them from the parents that raised them into a foster home will just damage them (unless parents are just very abusive)

  • chunes@lemmy.world
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    24 days ago

    As someone who has undergone extensive genetic testing, we’re still in the dark ages of medicine. We basically know nothing at all about jack.

    • Dasus@lemmy.world
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      24 days ago

      As someone with chronic issues, the amount of timed doctors just shrug and give up is kinda high.

      Thats what I like House M.D. though, because it’s basically a Sherlock show, there’s always an answer. Unlike in real life, where they just send you home without actually figuring things out. I’ve had like 8 seizures in the last 10 years and still the best I’ve got it “idk, MRI seemed clear” and that’s all.

    • RobotsLeftHand@lemmy.world
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      24 days ago

      The vast majority of what we do is just trying to get the body to a spot where it can manage the issue itself because we don’t have the means to do it ourselves.

      Personalized medicine is the frontier that everyone has been trying to break into since the race to decode the human genome. What a lot of people don’t realize is that for every drug that goes to market there are thousands of promising candidates that are shelved due to a small population of adverse effects.

      Now imagine what we can do if we can screen for those effects. Overnight the market would be flooded with powerful, effective medications with much fewer side effects. And that’s just medical drugs.

      • chunes@lemmy.world
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        24 days ago

        Personalized medicine is going to be much more of a political problem than a technical one, at least in my country. We have a hard enough time screening for things like cancer and diabetes.

  • Fredselfish@lemmy.world
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    25 days ago

    The must of truly love that woman to keep getting tested. The average man would nope out once it came back kid wasn’t his.

  • rockSlayer@lemmy.blahaj.zone
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    25 days ago

    I’m a data analyst at a medical nonprofit, primarily doing analyses on germline variants for rare forms of cancer. I’m new to this kind of work, but had a decent educational background in biology.

    Something I’ve learned is that genetics are complicated as hell. A single gene can produce multiple different proteins, and proteins change over time due to somatic variation. Only 1% of the genome are protein coding, called exomes. Exomes can be affected by variations to start and stop codons, non coding regions, and untranslated regions. There are entire fields dedicated to studying genome-wide, exomics, transcriptomics, proteomics, phenomics, and probably several others that I don’t know about. The amount of data involved with these fields is in the tebibytes region. Have you ever seen a “small” 3GiB csv? I have. The filtered and cleaned data frames created by genetics are over 100 columns wide and have nearly 5 million entries.

    There are companies creating artificial life by generating custom chromosomes. There’s a whole field of computer science dedicated to biological computing, using DNA as a storage medium. There are companies dedicated to simply classifying genes.

    DNA is cool as hell.

    • pelespirit@sh.itjust.works
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      25 days ago

      There are companies creating artificial life by generating custom chromosomes.

      My dude, not a fun thing to think about who might have control over that. Is it a musk, zuck, cook or epstein?

      • rockSlayer@lemmy.blahaj.zone
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        25 days ago

        No, none of those guys are involved afaik. The one that made the first breakthrough in artificial life is ran by the same dude who competed with the Human Genome Project to map 99% of the human genome. They modified an extremely simple bacteria that only had something like 300 base pairs

        • pelespirit@sh.itjust.works
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          25 days ago

          We still don’t know what type of person they are. Them being smart and focused on the research, doesn’t give them a pass. They could even not care who else has the info.

          • halcyoncmdr@piefed.social
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            25 days ago

            Yup. Many Nazi scientists only cared about the research. A lot of medical and physics breakthroughs last century directly resulted from those experiments.

              • halcyoncmdr@piefed.social
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                23 days ago
                1. Pervitin was an early form of methamphetamine, in large use by the Nazi military. Kept soldiers awake and alert and minimized appetite to stretch rations. Research around it and similar things helped further addiction and psychological distress.

                2. Elektroboot was the first electric submarine able to stay submerged for large lengths of time without needing to vent things like diesel exhaust. Even being able to charge while submerged.

                3. The Intramedullary Rod, an essential part of modern orthopedic surgery to heal broken bones.

                4. The Horton Ho 229 was an early attempt at stealth and flying wing aircraft. While never fully produced, the development led to further research after resulting in modern stealth aircraft and overall aircraft efficiency, and by extension detection and tracking.

                5. The Enigma Machine was a marvel of cryptographic security. Pretty sure this stands on its own.

                6. Messerschmitt Me 262 was the first mass produced fighter jet. Much of even modern jet propulsion technology stemmed from this research.

                7. 3D Films were used to enhance their propaganda well before Hollywood considered it.

                8. The Z4 Computer was one of the earliest commercial digital computers.

                9. Of course the V2 rocket. And by extension every Project Paperclip scientist brought back to the US to develop space technology at NASA, up to and including the Saturn V rocket and Apollo missions.

                10. The jerrycan, for fuel transport. Literally named after the British slang for German soldiers. So useful the Allies adopted it during the war.

                11. Chloroquine, an anti-Malaria drug developed by the Nazis, initially toxic but further refined after the war.

                12. Night vision technology also had massive developments made by their military scientists.