Definition of Sabin, Florence R.
Sabin, Florence R.: (1871-1953) American anatomist and medical researcher. Her excellent and innovative work on the origins of the lymphatic system, blood cells, and immune system cells, and on the pathology of tuberculosis was well-recognized during her lifetime. She was also a trailblazer for women in science. She was the first woman to hold a full professorship at Johns Hopkins School of Medicine, the first woman elected to the National Academy of Sciences, and the first woman to head a department at the Rockefeller Institute for Medical Research. In her retirement years, she pursued a second career as a public health activist in Colorado, and in 1951 received a Lasker Award for this work.
Florence Rena Sabin was born in Central City, Colorado, the daughter of George K. Sabin, a mining engineer, and Serena Miner Sabin, a schoolteacher. Her mother died of puerperal fever when Sabin was seven. She and her older sister Mary grew up in Denver, in Chicago with their uncle Albert Sabin, and in Vermont with their paternal grandparents. Both sisters attended Vermont Academy and Smith College. She was encouraged by the college physician to study medicine at Johns Hopkins' new co-educational medical school. She received her B.S. from Smith College in 1893, then taught high school for three years to earn enough to fund her first year of medical training.
Sabin entered the Johns Hopkins School of Medicine in 1896. Her skill and originality in laboratory classes attracted the attention of the anatomist Franklin P. Mall. He became Sabin's mentor, advocate, and intellectual role model, encouraging her pursuit of "pure" (rather than applied) science, and suggesting two projects which would help establish her research reputation. One of these was a three-dimensional model of a newborn baby's brainstem, which became the basis of a widely used textbook, An Atlas of the Medulla and Midbrain, published in 1901. The other project was an investigation of the embryological development of the lymphatic system.
After a year's internship at the Johns Hopkins Hospital, Sabin won a research fellowship and subsequently published two well-received papers. In 1902, she became the first woman faculty member at Johns Hopkins, teaching embryology and histology in the Department of Anatomy. She was promoted to associate professor in 1905, and to full professor in 1917, becoming the first woman to hold that rank at Johns Hopkins. Sabin stayed on the faculty at Johns Hopkins until 1925, and during that time distinguished herself both as a researcher and a teacher. She did important work on the origins of the lymphatic system, demonstrating (by injecting colored substances into the lymphatic channels) that its structures were formed from the embryo's veins rather than from other tissues, as other researchers believed. She also investigated the origins of blood vessels, blood cells, and connective tissue. To do this, she perfected the technique of supravital staining, which allowed the study of the living cells.
Although she was an inspiring teacher and enjoyed working with her students, by the early 1920s, Sabin was longing to devote her full energies to her research. In 1923, Simon Flexner, director of the Rockefeller Institute for Medical Research, invited her to join the Institute, and head its Department of Cellular Studies. She accepted his offer, and began her work there in 1925, the first woman to be appointed a full member at the Rockefeller Institute.
At the Rockefeller Institute, Sabin led research on the pathology of tuberculosis. Her team was part of a consortium of researchers working with the Medical Research Committee of the National Tuberculosis Association. During her thirteen years at Rockefeller, Sabin made major contributions to the understanding of tuberculosis, in particular by close study of the immune system responses to various chemical fractions isolated from the tuberculosis bacteria. Between 1930 and 1934, she also wrote a biography of her mentor, Franklin P. Mall, who had died in 1917.
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