John Joseph Bittner

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John Joseph Bittner (February 25, 1904 – December 14, 1961) was a geneticist and cancer biologist, who made many contributions on the genetics of breast cancer research, which were of value, not only in cancer research, but also in a variety of other biological investigations.

Geneticist biologist who studies genetics

A geneticist is a biologist who studies genetics, the science of genes, heredity, and variation of organisms.

Cancer disease of uncontrolled, unregulated and abnormal cell growth

Cancer is a group of diseases involving abnormal cell growth with the potential to invade or spread to other parts of the body. These contrast with benign tumors, which do not spread. Possible signs and symptoms include a lump, abnormal bleeding, prolonged cough, unexplained weight loss and a change in bowel movements. While these symptoms may indicate cancer, they can also have other causes. Over 100 types of cancers affect humans.

Breast cancer cancer that originates in the mammary gland

Breast cancer is cancer that develops from breast tissue. Signs of breast cancer may include a lump in the breast, a change in breast shape, dimpling of the skin, fluid coming from the nipple, a newly inverted nipple, or a red or scaly patch of skin. In those with distant spread of the disease, there may be bone pain, swollen lymph nodes, shortness of breath, or yellow skin.

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Biography

Bittner was born in Meadville, Pennsylvania, on February 25, 1904, the son of the late Martin and Minnie Bittner. John was one of four children, he had a brother and two sisters all of whom were highly educated. As a young man he was so proficient in baseball, basketball, and track that he received offers of athletic scholarships at several schools. He chose to attend St. Stephen's College (now Bard College) where he received a B.A. degree in 1925, with honors in biology. He taught at Donaldson Preparatory School, Ilchester, Maryland, for one year before beginning graduate work at the University of Michigan. While there he received his M.S. degree in 1929, and his Ph.D. in 1930. His Ph.D. thesis was entitled "A Genetic Study of the Transplantation of Tumors Arising in Hybrid Mice."

Meadville, Pennsylvania City in Pennsylvania, United States

Meadville is a city in and the county seat of Crawford County, Pennsylvania, United States. The city is within 40 miles of Erie and within 90 miles of Pittsburgh. It was the first permanent settlement in northwest Pennsylvania. The population was 13,388 at the 2010 census. The city of Meadville is the principal city of the Meadville, PA Micropolitan Statistical Area. As well as one of two cities, the other being Erie, that make up the larger Erie-Meadville, PA Combined Statistical Area.

Bard College private liberal arts college in Annandale-on-Hudson, New York

Bard College is a private liberal arts college in Annandale-on-Hudson, New York. The campus overlooks the Hudson River and Catskill Mountains, and is within the Hudson River Historic District, a National Historic Landmark.

A Bachelor of Arts is a bachelor's degree awarded for an undergraduate course or program in either the liberal arts, sciences, or both. Bachelor of Arts programs generally take three to four years depending on the country, institution, and specific specializations, majors, or minors. The word baccalaureus should not be confused with baccalaureatus, which refers to the one- to two-year postgraduate Bachelor of Arts with Honors degree in some countries.

His work on the genetics of breast cancer in mice, begun during his graduate years at Michigan, was continued at the newly formed Roscoe B. Jackson Memorial Laboratory at Bar Harbor, Maine. The founding director of the lab was Clarence Cook Little, who had previously been the President of the University of Michigan. Thus, aware of Bittner’s research, Little offered him a position as a Research Associate at the Jackson Laboratory. In 1940 Bittner became the lab’s Assistant Director, where he remained until December 1942. After a fire at the Jackson Laboratory in 1947, Bittner was one of the main contributors of replacement mice because he still had the purebred mouse strains needed to continue their research.

Bar Harbor, Maine Town in Maine, United States

Bar Harbor is a town on Mount Desert Island in Hancock County, Maine, United States. As of the 2010 census, its population is 5,235. Bar Harbor is a popular tourist destination in the Down East region of Maine and home to the College of the Atlantic, Jackson Laboratory, and MDI Biological Laboratory. Prior to a catastrophic 1947 fire, the town was a noted summer colony for the wealthy. Bar Harbor is home to the largest parts of Acadia National Park, including Cadillac Mountain, the highest point within twenty-five miles (40 km) of the coastline of the Eastern United States. The town is served by the Hancock County-Bar Harbor Airport, which serves year-round direct flights to Boston, Massachusetts.

In January 1943 he became the George Chase Christian Professor of Cancer Research and Director of the Division of Cancer Biology at the University of Minnesota. He held this appointment until his death, of a heart attack, on December 14, 1961. In addition, Bittner was a consultant for the Memorial Sloan-Kettering Cancer Center in New York for almost a decade prior to his death.

University of Minnesota public research university in Minneapolis and Saint Paul, Minnesota, United States

The University of Minnesota, Twin Cities is a public research university in Minneapolis and Saint Paul, Minnesota. The Minneapolis and St. Paul campuses are approximately 3 miles (4.8 km) apart, and the St. Paul campus is actually in neighboring Falcon Heights. It is the oldest and largest campus within the University of Minnesota system and has the sixth-largest main campus student body in the United States, with 50,943 students in 2018-19. The university is the flagship institution of the University of Minnesota system, and is organized into 19 colleges and schools, with sister campuses in Crookston, Duluth, Morris, and Rochester.

Cancer research

By far, the greatest impact of Bittner’s contributions to cancer research was the discovery in 1936, while working at the Jackson Lab, that a cancerous agent, which he called a "milk factor", could be transmitted by cancerous mothers to young mice while nursing.

Bittner used two families of mice: in Family A, almost all the mice, across many generations, developed breast cancer; in Family B, cancer seldom occurred. He then took a number of newborn mice from Family A, away from their cancerous mothers, and set them to nurse with immune mothers in Family B. Next, Bittner took babies from the immune Family B and set them to nurse with cancerous mothers from Family A. The result was that the young mice switched their cancer tendencies. Three out of four mice, which came from healthy Family B, developed cancer and died of it, while those originally from Family A remained healthy. Bittner noted that something in mouse milk appeared to pass the disease along. In other words, nursing mice transmit this agent, or "Bittner virus," in their milk, which ultimately leads to tumors in their offspring.

In addition, Bittner felt that genetic and hormonal influences, along with the milk agent, contributed to the origin of cancer. In 1966, it was proven that Bittner’s "milk factor" was a virus that remained dormant during the early life of the young mouse but produced cancer when hormonal conditions were right in middle age. The Bittner virus is now known as the Mouse mammary tumor virus (MMTV), a retrovirus. (see Timeline of Discovery 1936 under Oncovirus).

Mouse mammary tumor virus (MMTV) is a milk-transmitted retrovirus like the HTL viruses, HI viruses, and BLV. It belongs to the genus Betaretrovirus. MMTV was formerly known as Bittner virus, and previously the "milk factor", referring to the extra-chromosomal vertical transmission of murine breast cancer by adoptive nursing, demonstrated in 1936, by John Joseph Bittner while working at the Jackson Laboratory in Bar Harbor, Maine. Bittner established the theory that a cancerous agent, or "milk factor", could be transmitted by cancerous mothers to young mice from a virus in their mother's milk. The majority of mammary tumors in mice are caused by mouse mammary tumor virus.

Retrovirus family of viruses

A retrovirus is a type of RNA virus that inserts a copy of its genome into the DNA of a host cell that it invades, thus changing the genome of that cell. Such viruses are specifically classified as single-stranded positive-sense RNA viruses.

An oncovirus is a virus that can cause cancer. This term originated from studies of acutely transforming retroviruses in the 1950–60s, often called oncornaviruses to denote their RNA virus origin. It now refers to any virus with a DNA or RNA genome causing cancer and is synonymous with "tumor virus" or "cancer virus". The vast majority of human and animal viruses do not cause cancer, probably because of longstanding co-evolution between the virus and its host. Oncoviruses have been important not only in epidemiology, but also in investigations of cell cycle control mechanisms such as the retinoblastoma protein.

In 1947-48, Bittner was president of the American Association for Cancer Research and was a member of their board of directors from 1945 to 1951. He also served on the editorial advisory board of Cancer Research from 1941-1957.

The American Association for Cancer Research (AACR) is the world's oldest and largest professional association related to cancer research. Based in Philadelphia, the AACR focuses on all aspects of cancer research, including basic, clinical, and translational research into the etiology, prevention, diagnosis, and treatment of cancer. Founded in 1907 by 11 physicians and scientists, the organization now has more than 42,000 members in over 120 countries. The mission of the AACR is to prevent and cure cancer through research, education, communication, collaboration, science policy and advocacy, and funding for cancer research.

Throughout his career, Bittner served on numerous committees dealing with cancer research. During the summer of 1947, he was a member of the Medical Teaching Mission to Austria, sponsored by the Unitarian Service Committee, of the World Health Organization to "promote international exchange of medical and scientific knowledge."

Bittner authored, or co-authored, over 240 papers on cancer research, and contributed chapters to several books. He lectured widely in this country and abroad and attended many national and international meetings.

Honors

Bittner received many awards, citations, and medals during his career. The most notable include the following:

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References

Rader. Karen A. Making Mice Standardizing Animals For American Biomedical Research 1900-1955 Princeton University Press (2004)

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