Tag Archives | Genetics

Genetic Analysis Suggests Ancient Humans Interbred Extensively Neanderthals, Denisovans And An “Unknown Population”

neanderthalNature hints that modern humans have a mysterious X factor ancestor:

Genome analysis suggests there was interbreeding between modern humans, Neanderthals, Denisovans and an unknown archaic population. Updated genome sequences from two extinct relatives of modern humans suggest that these ‘archaic’ groups bred with humans and with each other more extensively than was previously known.

The ancient genomes, one from a Neanderthal and one from a member of an archaic human group called the Denisovans, were presented on 18 November at a meeting on ancient DNA at the Royal Society in London. The results suggest that interbreeding went on between the members of several ancient human-like groups in Europe and Asia more than 30,000 years ago, including an as-yet-unknown human ancestor from Asia.

All modern humans whose ancestry originates outside of Africa owe about 2% of their genome to Neanderthals. Certain populations living in Oceania, such as Papua New Guineans and Australian Aboriginals, share about 4% of their DNA with Denisovans.

Read the rest
Continue Reading

Humans May Have Originated As A Pig-Chimp Hybrid

pig-chimpPerhaps the real reason human beings feel the urge to keep kosher/halal is that in pigs we subconsciously recognize a glimmer of ourselves. Phys.org reports:

Dr. Eugene McCarthy is a Ph.D. geneticist who has made a career out of studying hybridization in animals. He has amassed an impressive body of evidence suggesting that human origins can be best explained by hybridization between pigs and chimpanzees. Extraordinary theories require extraordinary evidence and McCarthy does not disappoint. Rather than relying on genetic sequence comparisons, he instead offers extensive anatomical comparisons, which are startling when taken together.

The list of anatomical specializations we may have gained from porcine philandering is too long to detail here. Similarities in the face, skin and organ microstructure alone are hard to explain away. A short list of differential features would include, multipyramidal kidney structure, presence of dermal melanocytes, melanoma, absence of a primate baculum (penis bone), surface lipid and carbohydrate composition of cell membranes, vocal cord structure, laryngeal sacs, diverticuli of the fetal stomach, intestinal “valves of Kerkring,” heart chamber symmetry, skin and cranial vasculature and method of cooling, and tooth structure.

Read the rest
Continue Reading

Japanese Scientists Receive Approval To Create Human-Animal Embryos

human-animal embryos

The Japan Times reports on mixing and matching the components of humans and non-human animals:

Proposed experiments with animal-human embryos cleared the first regulatory hurdle Tuesday as Japanese scientists seek permission for tests that could see human organs produced inside the growing body of an animal.

Researchers want to introduce a human stem cell into an animal embryo, to create a so-called chimeric embryo, which they can implant into an animal’s womb.

The hope is that this stem cell will grow into a fully-functioning human organ — a kidney or a liver, for example — as the animal matures. This would mean when the creature is fully grown, the organ could be harvested from the animal and used for transplanting into a person in need.

Unlike in the United States, there is little public opposition to research of this kind, with domestic media coverage overwhelmingly positive, reflecting relatively high levels of scientific literacy in the country.

Read the rest
Continue Reading

Supreme Court Rules Against Patenting Of Human Genes

 Patenting Of Human GenesGreat to know that I’m not infringing on anyone’s copyrights with my existence. The Los Angeles Times reports:

In a unanimous ruling Thursday, the Supreme Court ruled that human genes are a product of nature and cannot be patented and held for profit, a decision that medical experts said will lead to more genetic testing for cancers and other diseases and to lower costs for patients.

The decision invalidates a Utah company’s patents on two genes that are linked to breast and ovarian cancer, and is likely to lead to several thousand other gene patents being tossed as well.

The court’s decision also came as a relief to the biotech industry. While the justices agreed “naturally occurring DNA” cannot be patented, they also said DNA “synthetically created” in a lab can be patented. Industry lawyers had worried the court could issue a sweeping decision that would wipe out patents for genetically engineered drugs or farm products.

Read the rest
Continue Reading

Sequenced Genome Of Sacred Lotus May Yield Anti-Aging Secrets

sacred lotusContemporary science meets ancient wisdom via redOrbit:

A team of international scientists report today that they have sequenced and annotated the genome of the sacred lotus (Nelumbo nucifera). The research was co-led by Ray Ming, a plant biology professor at University of Illinois’ Institute for Genomic Biology; Jane Shen-Miller, a plant biology professor at UCLA; and Shaohua Li, director of the Wuhan Botanical Garden at the Chinese Academy of Sciences. The team have sequenced nearly 90 percent of the plant’s 27,000 genes.

The sacred lotus has the ability to repair genetic defects, and may hold a key to the secrets of aging; the seeds of the lotus can survive up to 1,300 years. The sacred lotus is known from the geologic record as early as 135 million years ago. The plant has been grown in China for at least the last 4,000 years, and has long been used there for food and medicine.

Read the rest
Continue Reading

Glowing Plants Coming to a Streetlamp Near You?

A night sky lit only by stars and glowing plants sounds pretty awesome, but I can’t believe that there wouldn’t be unforeseen consequences. I’d hate to have to explain to our great grandchildren that they’re living in a world full of glowing, genetically polluted foodstuffs because our generation thought it sounded cool at the time.

Read the rest

Continue Reading

Child Abuse Changes Gene Activity Patterns

TonitzaOrfanderazboiIt looks like child abuse does more than leave physical and emotional scarring: It changes its victims on a genetic level.

Via Medical News Today:

A study of adult civilians with PTSD (post-traumatic stress disorder) has shown that individuals with a history of childhood abuse have distinct, profound changes in gene activity patterns, compared to adults with PTSD but without a history of child abuse.

A team of researchers from Atlanta and Munich probed blood samples from 169 participants in the Grady Trauma Project, a study of more than 5000 Atlanta residents with high levels of exposure to violence, physical and sexual abuse and with high risk for civilian PTSD.

The results were published recently in Proceedings of the National Academy of Sciences, Early Edition.

“These are some of the most robust findings to date showing that different biological pathways may describe different subtypes of a psychiatric disorder, which appear similar at the level of symptoms but may be very different at the level of underlying biology,” says Kerry Ressler, MD, PhD, professor of psychiatry and behavioral sciences at Emory University School of Medicine and Yerkes National Primate Research Center.

Read the rest
Continue Reading

Study Suggests Yoga Boosts The Immune System On A Genetic Level

yogaThe results support yoga as a powerful therapy, but more broadly, reinforce the fact that our very genes are affected by our activities and moods. Pacific Standard writes:

Newly published research from Norway suggests that a yoga program rapidly produces internal changes on a genetic level. The results help explain the well-documented health benefits of this ancient practice.

“These data suggest that previously reported effects of yoga practices have an integral physiological component at the molecular level, which is initiated immediately,” writes a research team led by Fahri Saatcioglu of the University of Oslo.

The experiment featured 10 participants who attended a yoga retreat in Germany. For two days, participants spent two hours practicing a comprehensive yoga program and meditation. For the next two days, they spent that same time period going on a nature walk and then listening to jazz or classical music.

Immediately before and after each of the four sessions, the researchers drew blood from each participant.

Read the rest
Continue Reading

Uruguayan Scientists Create Healthy Glow-In-The-Dark Sheep

It has been announced that nine sheep born this past October at Uruguay's Institute of Animal Reproduction have been developing normally and living contentedly. The sheep were genetically engineered to contain a gene from a jellyfish which spurs the production of green fluorescent protein, a modification which will no doubt soon be a common one for designer house pets:
Continue Reading

Could An Extraterrestrial Message Be Encoded In Our DNA?

Could a message have been inserted into our genetics billions of years ago, as the most durable method of communicating with intelligent life eons later? Discovery News ponders:

Could our genes have an intelligently designed “manufacturer’s stamp” inside them, written eons ago elsewhere in our galaxy?

Vladimir I. shCherbak of al-Farabi Kazakh National University of Kazakhstan, and Maxim A. Makukov of the Fesenkov Astrophysical Institute, hypothesize that an intelligent signal embedded in our genetic code would what they call “biological SETI.”

In the journal Icarus, they assert: “Once fixed, the code might stay unchanged over cosmological timescales. Therefore it represents an exceptionally reliable storage for an intelligent signature.” To pass the designer label test, any patterns in the genetic code must be highly statistically significant and possess intelligent-like features that are inconsistent with any natural know process.

They go on to argue that their detailed analysis of the human genome displays a thorough precision-type orderliness in the mapping between DNA’s nucleotides and amino acids.

Read the rest
Continue Reading