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A HeLa cell , also Hela or hela cell, is a cell type in an immortal cell line used in scientific research. It is the oldest and most commonly used human cell line. The line was derived from cervical cancer cells taken on February 8, 1951 from Henrietta Lacks, a patient who died of her cancer on October 4, 1951. The cell line was found to be remarkably durable and prolific which warrants its extensive use in scientific research.

The cells from Lacks' tumor were taken without her knowledge or consent by researcher George Gey, who found that they could be kept alive. Before this, cells cultured from other cells would only survive for a few days. Scientists spent more time trying to keep the cells alive than performing actual research on them, but some cells from Lacks' tumor sample behaved differently from others. George Gey was able to isolate one specific cell, multiply it, and start a cell line. Gey named the sample HeLa, after the initial letters of Henrietta Lacks' name. They were the first human cells grown in a lab that were "immortal," meaning that they do not die after a few cell divisions, and they could be used for conducting many experiments. This represented an enormous boon to medical and biological research.

The stable growth of HeLa enabled a researcher at the University of Minnesota hospital to successfully grow polio virus, enabling the development of a vaccine, and by 1954, Jonas Salk developed a vaccine for polio using these cells. To test Salk's new vaccine, the cells were put into mass production in the first-ever cell production factory.

In 1955, HeLa cells were the first human cells successfully cloned.

Demand for the HeLa cells quickly grew. Since they were put into mass production, Lacks' cells have been used by scientists around the globe for "research into cancer, AIDS, the effects of radiation and toxic substances, gene mapping, and countless other scientific pursuits". HeLa cells have been used to test human sensitivity to tape, glue, cosmetics, and many other products. Scientists have grown some 20 tons of her cells, and there are almost 11,000 patents involving HeLa cells.

Hela (Blake)

In the mythological writings of William Blake, Hela is the youngest of the five daughters of Tiriel. She is the only survivor of his curse. She denounces her blind father for what he has done; he curses her once more, turning her hair to Medusa-style snakes. She guides him to the Vales of Har.

Hela (comics)

Hela is a fictional supervillainess appearing in American comic books published by Marvel Comics. The Asgardian goddess of death is based on the Norse goddess, Hel. The ruler of Hel and Niffleheim, the character has been a frequent foe of Thor. Debuting in the Silver Age of comic books, Hela first appeared in Journey into Mystery #102 and was adapted from Norse Myths by Stan Lee and Jack Kirby.

She will make her Marvel Cinematic Universe debut in Thor: Ragnarok, played by Cate Blanchett.

Hela (caste)

The Hela are a Hindu scheduled caste found in the state of Uttar Pradesh in India.

Usage examples of "hela".

During one of the respites, idly talking men decided that Aegir and Ran had naught to do with this awful stretch of water, and the skalds must merely have failed to make mention that here reigned Loki and his ugly get, Hela who ruled the underworld.

For childhood Balder is not dead, and Hela gives Again her prey us often as a child is born.

This group exercised in the Baltic between Hela, Bornholm and Eckernforde, and was intended to acclimatise newly-commissioned boats to operational conditions.

Hela, but something in her voice made Lissar look up at her again, and there was that expression, much like what she had seen in so many of the faces she had looked at since she came down from the mountains: something like awe, something like wistfulness, something like wariness.