Melvin Cohn (1922 – October 23, 2018) was an American immunologist who co-founded the

Salk Institute for Biological Studies The Salk Institute for Biological Studies is a scientific research institute in the La Jolla community of San Diego, California. The independent, non-profit institute was founded in 1960 by Jonas Salk, the developer of the polio vaccine; among th ...

La Jolla La Jolla ( , ) is a hilly, seaside neighborhood in San Diego, California, occupying of curving coastline along the Pacific Ocean. The population reported in the 2010 census was 46,781. The climate is mild, with an average daily temperature o ...

, California. He demonstrated that

immunoglobulins An antibody (Ab) or immunoglobulin (Ig) is a large, Y-shaped protein belonging to the immunoglobulin superfamily which is used by the immune system to identify and neutralize antigens such as bacteria and viruses, including those that cause di ...

and

white blood cells White blood cells (scientific name leukocytes), also called immune cells or immunocytes, are cells of the immune system that are involved in protecting the body against both infectious disease and foreign entities. White blood cells are genera ...

interact directly with

pathogens In biology, a pathogen (, "suffering", "passion" and , "producer of"), in the oldest and broadest sense, is any organism or agent that can produce disease. A pathogen may also be referred to as an infectious agent, or simply a germ. The term ...

to protect the body from

infection An infection is the invasion of tissue (biology), tissues by pathogens, their multiplication, and the reaction of host (biology), host tissues to the infectious agent and the toxins they produce. An infectious disease, also known as a transmis ...

, and is considered a pioneer in the research of

regulation of gene expression Regulation of gene expression, or gene regulation, includes a wide range of mechanisms that are used by cells to increase or decrease the production of specific gene products (protein or RNA). Sophisticated programs of gene expression are wide ...

Early life

Cohn was born in New York City in 1922. Although both of his parents worked in law, he chose to study physics at the

City College of New York The City College of the City University of New York (also known as the City College of New York, or simply City College or CCNY) is a Public university, public research university within the City University of New York (CUNY) system in New York ...

. After graduating in 1940, he entered the graduate school of

Columbia University Columbia University in the City of New York, commonly referred to as Columbia University, is a Private university, private Ivy League research university in New York City. Established in 1754 as King's College on the grounds of Trinity Churc ...

and earned his master's degree in chemistry. During World War II, Cohn was drafted into the

United States Army The United States Army (USA) is the primary Land warfare, land service branch of the United States Department of Defense. It is designated as the Army of the United States in the United States Constitution.Article II, section 2, clause 1 of th ...

and served in a medical research unit in the

Pacific Theater The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is bounded by the continen ...

. After the end of the war, he was sent to

Hiroshima is the capital of Hiroshima Prefecture in Japan. , the city had an estimated population of 1,199,391. The gross domestic product (GDP) in Greater Hiroshima, Hiroshima Urban Employment Area, was US$61.3 billion as of 2010. Kazumi Matsui has b ...

, Japan, in 1945 to study the after-effects of the

atomic bombing Atomic may refer to: * Of or relating to the atom, the smallest particle of a chemical element that retains its chemical properties * Atomic physics, the study of the atom * Atomic Age, also known as the "Atomic Era" * Atomic scale, distances comp ...

of the city. He also diagnosed patients affected by a major

diphtheria Diphtheria is an infection caused by the bacteria, bacterium ''Corynebacterium diphtheriae''. Most infections are asymptomatic or have a mild Course (medicine), clinical course, but in some outbreaks, the mortality rate approaches 10%. Signs a ...

epidemic in the country. After being discharged from the army in 1946, he attended

New York University New York University (NYU) is a private university, private research university in New York City, New York, United States. Chartered in 1831 by the New York State Legislature, NYU was founded in 1832 by Albert Gallatin as a Nondenominational ...

and earned his Ph.D. in biochemistry in 1949 with a specialization in

Career

From 1949 Cohn worked in Paris, France, at the

Pasteur Institute The Pasteur Institute (, ) is a French non-profit private foundation dedicated to the study of biology, micro-organisms, diseases, and vaccines. It is named after Louis Pasteur, who invented pasteurization and vaccines for anthrax and rabies. Th ...

, researching genes and cells with the French scientist

Jacques Monod Jacques Lucien Monod (; 9 February 1910 – 31 May 1976) was a French biochemist who won the Nobel Prize in Physiology or Medicine in 1965, sharing it with François Jacob and André Lwoff "for their discoveries concerning genetic control of e ...

, who later won the

Nobel Prize in Physiology or Medicine The Nobel Prize in Physiology or Medicine () is awarded yearly by the Nobel Assembly at the Karolinska Institute for outstanding discoveries in physiology or medicine. The Nobel Prize is not a single prize, but five separate prizes that, acco ...

. From 1955 to 1958, Cohn served as professor of

microbiology Microbiology () is the branches of science, scientific study of microorganisms, those being of unicellular organism, unicellular (single-celled), multicellular organism, multicellular (consisting of complex cells), or non-cellular life, acellula ...

at the

Washington University School of Medicine Washington University School of Medicine (WashU Medicine) is the medical school of Washington University in St. Louis, located in the Central West End neighborhood of St. Louis, Missouri. Founded in 1891, the School of Medicine shares a ca ...

St. Louis St. Louis ( , sometimes referred to as St. Louis City, Saint Louis or STL) is an independent city in the U.S. state of Missouri. It lies near the confluence of the Mississippi and the Missouri rivers. In 2020, the city proper had a populatio ...

, Missouri. In 1959, he moved to

Stanford University School of Medicine The Stanford University School of Medicine is the medical school of Stanford University and is located in Stanford, California, United States. It traces its roots to the Medical Department of the University of the Pacific, founded in San Fra ...

Palo Alto, California Palo Alto ( ; Spanish language, Spanish for ) is a charter city in northwestern Santa Clara County, California, United States, in the San Francisco Bay Area, named after a Sequoia sempervirens, coastal redwood tree known as El Palo Alto. Th ...

, where he was professor of biochemistry. Cohn's reputation as a leading researcher in molecular biology attracted the attention of

Jonas Salk Jonas Edward Salk (; born Jonas Salk; October 28, 1914June 23, 1995) was an American virologist and medical researcher who developed one of the first successful polio vaccines. He was born in New York City and attended the City College of New ...

, who was planning to build the

. They struck a friendship as Cohn drove Salk around the

San Francisco Bay Area The San Francisco Bay Area, commonly known as the Bay Area, is a List of regions of California, region of California surrounding and including San Francisco Bay, and anchored by the cities of Oakland, San Francisco, and San Jose, California, S ...

looking at potential sites. In 1961, when Salk decided to build his institute in

, California, he invited Cohn and

Renato Dulbecco Renato Dulbecco ( , ; February 22, 1914 – February 19, 2012) was an Italian–American virologist who won the 1975 Nobel Prize in Physiology or Medicine for his work on oncoviruses, which are viruses that can cause cancer when they infect anim ...

to serve as co-founders, which they both accepted despite the risks involved in joining a new venture that was still short of money. Cohn's wife, biologis
Suzanne Bourgeois
also joined them. Cohn studied the

immune system The immune system is a network of biological systems that protects an organism from diseases. It detects and responds to a wide variety of pathogens, from viruses to bacteria, as well as Tumor immunology, cancer cells, Parasitic worm, parasitic ...

at the Salk Institute for the next 57 years. He demonstrated that immunoglobulins and

react directly to

to protect the body from infection, and developed computer models to predict the immune system's response to infections.

Personal life

Cohn married Ruby Burman, a theater scholar and authority on

Samuel Beckett Samuel Barclay Beckett (; 13 April 1906 – 22 December 1989) was an Irish writer of novels, plays, short stories, and poems. Writing in both English and French, his literary and theatrical work features bleak, impersonal, and Tragicomedy, tra ...

, in 1946. They divorced in 1961. He later married again, to biologist Suzanne Bourgeois. Cohn died in

San Diego San Diego ( , ) is a city on the Pacific coast of Southern California, adjacent to the Mexico–United States border. With a population of over 1.4 million, it is the List of United States cities by population, eighth-most populous city in t ...

, California, on October 23, 2018, at the age of 96.

Honors and recognition

Some of the honors and awards Cohn had received: *

Eli Lilly and Company-Elanco Research Award The Eli Lilly and Company-Elanco Research Award was a scientific award presented annually by the American Society for Microbiology (ASM) and sponsored by the Eli Lilly and Company and its subsidiary Elanco (which became an independent company in 201 ...

(1956) * Honorary Member of the Scandinavian Society for Immunology (1978) * Member of the

American Academy of Arts and Sciences The American Academy of Arts and Sciences (The Academy) is one of the oldest learned societies in the United States. It was founded in 1780 during the American Revolution by John Adams, John Hancock, James Bowdoin, Andrew Oliver, and other ...

(1980) * Sandoz Prize in Basic Immunology (1995)

References

{{DEFAULTSORT:Cohn, Melvin 1922 births 2018 deaths 20th-century American biochemists American immunologists City College of New York alumni Columbia Graduate School of Arts and Sciences alumni New York University alumni Washington University School of Medicine faculty Pasteur Institute Scientists from New York City Military personnel from New York City United States Army personnel of World War II American microbiologists Fellows of the American Academy of Arts and Sciences Salk Institute for Biological Studies people Stanford University School of Medicine faculty