- In full:
- Craig Cameron Mello
- Born:
- Oct. 18, 1960, New Haven, Conn., U.S. (age 66)
- Awards And Honors:
- Nobel Prize (2006)
- Subjects Of Study:
- RNA
- RNA interference
- double-stranded RNA
Craig C. Mello
-
Who is Craig C. Mello?
Craig C. Mello, born on October 18, 1960, is an American scientist who shared the 2006 Nobel Prize in Physiology or Medicine with Andrew Z. Fire for discovering RNA interference (RNAi), a mechanism that regulates gene activity.
Growing up with a paleontologist father, James Mello, he developed an early interest in the living world. Mello's curiosity led him to study biochemistry and molecular biology at Brown University, earning a B.S. in 1982, followed by a Ph.D. in biology from Harvard in 1990. Mello's work at the Fred Hutchinson Cancer Research Center shifted his focus to genes regulating nematode development. Teaming up with Fire, Mello uncovered that genes were silenced by double-stranded RNA, which they named RNAi. This discovery has become a valuable tool in biological research and disease treatment.
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What is a geneticist?
A geneticist studies heredity and genes, often focusing on understanding and treating genetic diseases. They conduct lab research to study gene function and explore treatments, sometimes using model organisms like bacteria and fruit flies to gain insights into human gene function.
Craig C. Mello (born in 1960) is an American scientist and geneticist who shared the 2006 Nobel Prize for Physiology or Medicine with Andrew Z. Fire for discovering RNA interference (RNAi). RNAi is a mechanism that regulates gene activity. Mello's work at the University of Massachusetts Medical School led to the discovery that genes could be silenced by double-stranded RNA, a breakthrough with valuable research and therapeutic applications.
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What important discovery is Craig C. Mello known for?
Craig C. Mello is an American scientist known for his co-discovery of RNA interference (RNAi) with Andrew Z. Fire, for which they shared the 2006 Nobel Prize in Physiology or Medicine. RNAi is a regulatory system within eukaryotic cells that silences or deactivates genes. Mello and Fire found that genes could be silenced by introducing double-stranded RNA (dsRNA) into cells. This mechanism regulates gene activity and defends against viral infections. The discovery of RNAi has become a valuable research tool, enabling scientists to block genes to uncover their functions and roles in disease and to develop new treatments for diseases such as AIDS, cancer, and hepatitis.
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What is RNA interference (RNAi)?
RNA interference (RNAi) is a regulatory system inside eukaryotic cells that was discovered by American scientists Andrew Z. Fire and Craig C. Mello in the 1990s. They shared the 2006 Nobel Prize for Physiology or Medicine for this discovery.
RNAi controls gene activity by deactivating genes. Fire and Mello successfully inhibited the expression of specific genes by introducing short double-stranded RNA (dsRNA) segments into nematode cells. The dsRNA segments attach to molecules of messenger RNA (mRNA), inhibiting the translation of the mRNA molecules into proteins.
Synthetic dsRNAs can manipulate gene activity to better understand their functions. RNAi is being explored as a treatment for diseases, including macular degeneration, hepatitis, AIDS, Huntington disease, and cancer.
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How did Craig C. Mello's work change genetic research?
Craig C. Mello, along with Andrew Z. Fire, discovered RNA interference (RNAi), a mechanism that regulates gene activity in eukaryotic cells by silencing genes. Their 1998 findings, which earned them the Nobel Prize, demonstrated that genes could be silenced by injecting double-stranded RNA into cells.
RNAi has become a valuable research tool, enabling scientists to manipulate gene activity to understand gene functions better. It is also being explored as a treatment for diseases such as AIDS, cancer, and hepatitis.
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What awards or recognitions has Craig C. Mello received for his contributions to science?
Craig C. Mello is an American geneticist who shared the Nobel Prize for Physiology or Medicine with Andrew Z. Fire in 2006 for discovering RNA interference (RNAi), a mechanism that regulates gene activity. In 2000, he was awarded the title of Howard Hughes Medical Investigator for his significant contributions to science.
Mello's curiosity in the living world was influenced by his father, James Mello, a paleontologist. Mello's work involved identifying genes involved in regulating nematode development. Silencing genes in C. elegans allowed Mello to identify the functions of the genes he had discovered.
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Craig C. Mello (born Oct. 18, 1960, New Haven, Conn., U.S.) is an American scientist, who was a corecipient, with Andrew Z. Fire, of the Nobel Prize for Physiology or Medicine in 2006 for discovering RNA interference (RNAi), a mechanism that regulates gene activity.
Education and early career
Mello grew up in northern Virginia, and, as a young boy, he developed an intense curiosity in the living world. His curiosity was largely influenced by his father, James Mello, a paleontologist who had served as the associate director of the National Museum of Natural History at the Smithsonian Institution in Washington, D.C. Mello was intrigued by fundamental concepts such as evolution, which he felt encouraged people to ask questions about the world around them and which led to his rejection of religion at a young age. Mello attended Brown University in Providence, Rhode Island, studying biochemistry and molecular biology and receiving a B.S. degree in 1982. He began his graduate studies in biology at the University of Colorado in Boulder, where he worked in the laboratory of American molecular biologist David Hirsh, who was investigating the nematode Caenorhabditis elegans.
While conducting research in Hirsh’s lab, Mello was introduced to American molecular biologist Dan Stinchcomb. When Stinchcomb decided to move to Harvard University to start his own research laboratory, Mello followed him. At Harvard Mello became deeply involved in research on C. elegans, and his studies led him to American scientist Andrew Z. Fire, who was working at the Carnegie Institution for Science in Baltimore. Both Mello and Fire were working to find a way to insert DNA into C. elegans, a process known as DNA transformation. After exchanging ideas and elaborating on one another’s experiments, they successfully developed a procedure for DNA transformation in nematodes. In 1990, following the completion of his thesis, C. elegans DNA Transformation, Mello graduated from Harvard with a Ph.D. in biology.
Discovery of RNAi
Mello worked at the Fred Hutchinson Cancer Research Center in Seattle, Washington, from 1990 to 1994. He continued studying C. elegans, though his focus had shifted to identifying genes involved in regulating nematode development. In 1994 Mello joined the faculty at the University of Massachusetts Medical School. He became interested in an RNA injection technique used to silence genes.
Silencing genes in C. elegans enabled Mello to identify the functions of the genes he had discovered while working in Seattle. He soon found that some nematode embryos that had been injected with RNA to silence certain genes were able to transmit the silencing effect to their offspring. Mello and Fire worked in collaboration to uncover the cellular mechanism driving this active silencing phenomenon and discovered that the genes were being silenced by double-stranded RNA. Known as RNAi, this mechanism regulates gene activity and helps defend against viral infection. In 1998 they published their findings, for which they later received the Nobel Prize. RNAi has proved a valuable research tool, enabling scientists to block genes in order to uncover the basic functions and roles of genes in disease. RNAi can also be used to develop new treatments for a number of diseases, including AIDS, cancer, and hepatitis.
Following the RNAi publication, Mello focused his research on applying the silencing technique to the study of embryonic cell differentiation in C. elegans. In 2000 Mello was awarded the title of Howard Hughes Medical Investigator because of his significant contributions to science.