Earl Sutherland

Earl Sutherland was an American biochemist and pharmacologist whose groundbreaking research fundamentally altered the understanding of hormone action and cell signaling. He is best known for his discovery of cyclic adenosine monophosphate (cyclic AMP) as a crucial intracellular messenger, a finding for which he was awarded the Nobel Prize in Physiology or Medicine in 1971. Sutherland's work established the foundational concept of the second messenger system, a pivotal mechanism in molecular biology and endocrinology.

Early life and education

Earl Wilbur Sutherland Jr. was born in Burlingame, Kansas, and developed an early interest in science. He completed his undergraduate studies at Washburn University in Topeka, Kansas, before enrolling at the Washington University School of Medicine in St. Louis. There, he earned his medical degree in 1942. His early medical training was interrupted by service as a battalion surgeon in the European Theater of Operations during World War II. After the war, he returned to Washington University in St. Louis for residency and began his research career in the laboratory of the renowned biochemist Carl Cori, a future Nobel Prize laureate whose work on glycogen metabolism profoundly influenced Sutherland's scientific direction.

Research and career

Sutherland's initial independent research positions were at Washington University in St. Louis and later at Case Western Reserve University in Cleveland, Ohio. His early investigations focused on the mechanisms of hormone action, particularly the effects of epinephrine and glucagon on carbohydrate metabolism. He was especially interested in how these hormones, which do not enter cells, could trigger rapid biochemical changes like the breakdown of glycogen in the liver. This line of inquiry led him to develop novel techniques for studying enzyme activity in broken cell preparations, a methodological breakthrough that was critical for his subsequent discoveries. In 1963, he moved to Vanderbilt University in Nashville, Tennessee, where he chaired the Department of Physiology and continued his seminal work.

Discovery of cyclic AMP

The central breakthrough of Sutherland's career came through persistent experimentation on how epinephrine stimulates the production of glucose. He and his colleagues, including Theodore Rall, identified a heat-stable factor that was produced inside liver cells when the hormone acted on the cell surface. This factor was isolated and chemically characterized as cyclic adenosine monophosphate (cyclic AMP). Sutherland demonstrated that cyclic AMP acted as an intracellular "second messenger," relaying the signal from the hormone (the "first messenger") to activate the enzyme phosphorylase, which then catalyzes glycogen breakdown. This discovery, published in a series of landmark papers, revealed a universal signaling mechanism used by many hormones and neurotransmitters, revolutionizing the fields of endocrinology, neuroscience, and cell biology.

Awards and honors

Sutherland's transformative contributions were recognized with numerous prestigious awards. He received the Albert Lasker Award for Basic Medical Research in 1970. The pinnacle of his recognition came in 1971 when he was awarded the Nobel Prize in Physiology or Medicine for his discoveries concerning the mechanisms of the action of hormones. In 1973, he was presented with the National Medal of Science by President Richard Nixon. He was also elected to the United States National Academy of Sciences and the American Academy of Arts and Sciences. His legacy is further honored through awards like the Earl Sutherland Prize for Achievement in Research at Vanderbilt University.

Personal life and legacy

Sutherland was known as a modest and dedicated scientist who preferred the laboratory to the limelight. He was married to Mildred Rice, with whom he had three children. He died suddenly of esophageal hemorrhage in Miami, Florida, in 1974. His discovery of cyclic AMP and the second messenger concept remains one of the cornerstones of modern biomedical science, providing the framework for understanding countless physiological processes and the mechanism of action of many drugs. The Earl Sutherland Research Building at Vanderbilt University Medical Center stands as a testament to his enduring impact on medical research and education.

Category:American biochemists Category:Nobel laureates in Physiology or Medicine Category:Recipients of the National Medal of Science