Causes, Viruses: HPV, Steinberg
Professor Steinberg explains that HPVs are a family of related viruses, and they're small DNA tumor viruses that can cause tumors in either their natural host or another organism.
Bettie Steinberg, Ph.D., talks about HPV and its prevalence among the population. â€œO.K. HPVs are a family of related viruses. They're in a group called the small DNA tumor viruses, which means they have DNA inside the virus and they can cause tumors in either their natural host or another organism. The HPVs are human papilloma viruses. There are more than a hundred different types and they are extremely common. Some of the types cause skin warts, or plantar warts. Other types infect the mucus membranes and they cause things like genital warts and genital tract infections. They are extremely common. Everybody has these viruses. We have them in our skin and and we have them in our mucus membranes. They live with us. And the estimate is that at least 70% of women will have an HPV infection of the genital tract, primarily the cervix at some time, during their life.â€
dna tumor viruses, human papilloma viruses, skin warts, mucus membranes, plantar warts, hpv infection, genital warts, life professor, natural host, tract infections, steinberg, cervix, organism, prevalence, tumors, virus, population
- ID: 1000
- Source: DNALC.IC
In this section learn how viruses contribute to cancer development.
Professor Galloway explains that there are many HPVs that infect the genital tract and a set of those cause benign genital warts but another set is able to cause lesions that will go on and progress to cervical or other anal-genital cancers.
David Baltimore and Howard Temin explain work on the Rous sarcoma virus.
Mature virus particles released from host cell.
Professor Galloway explains that viruses don't want to cause cancer, they just want to make more virus.
Bacterial conjugation and bacteriophages provide proof that a gene is made of DNA.
Virus particle is fusing with the cell membrane and about to empty its contents into the cell. Note the visible inner core.
Howard Temin, David Baltimore and Renato Dulbecco shared the 1975 Nobel Prize in Physiology or Medicine for the discoveries concerning the interaction between tumor viruses and the genetic material of the cell.
Virus particle budding out from the cell. Although similar to the previous micrograph, the inner core is not as dense and therefore this is an "immature" viron budding out as opposed to a mature virus fusing in to infect a cell.
Professor Groopman explains that we have an effective vaccine against the hepatitis B virus, but because the transmission of this virus occurs very early in life, we need to have the resources and the ability to vaccinate the world for the rest of the 21s