Sir Frederick grant Banting and Charles Herbert best

In Lexical by Sabine Rodrigues Views: 8

Discoverer of insulin

Sir Frederick grant Banting

• Surgeon, physiologist
• * 14 November 1891 in Alliston, Ontario (Ontario, Canada)
• D. 21 February 1941 in Newfoundland

Charles Herbert best

• Physiologist, biochemist
• * February 27, 1899 in West Pembroke (Maine, United States)
• D. 31 March 1978 in Toronto

Biography

Frederick Banting and Charles best are explorers of the antidiabetic hormone insulin. Within only four years, they solved the main problem of the isolation of insulin and have successfully completed the application in the human experiment. Thus, they created the foundations for a therapy that helps diabetics to be able to live with their condition. in 1923, Banting was awarded the Nobel Prize for medicine and Physiology along with Scottish physiologist John James Richard MacLeod (1876-1935) for “the discovery of insulin”. Banting protested against the distribution of the prize, because he felt his pupil and Assistant Charles best as the actual discoverer of insulin, given that the practical implementation of the experiments was only their both work. Therefore, Banting shared his prize money with best. MacLeod passed then also one half of its stake in the Canadian biochemist James Bertram Collip (1892-1965), had developed a fundamental process for the purification of insulin.

Diabetes mellitus has been known, but the cause was long unclear antiquity. The therapy was primarily limited to dietary measures. Only in the 1890s diabetes had been recognised mellitus as a disease of the pancreas (pancreatic), with the lack of a (still hypothetical) hormone. This hormone is produced in the so-called islet cells, the German Histologe Paul Langerhans (1847-1888) had discovered in 1869 (Langerhans – Islands); the Belgian pathologist Jean de Meyer (1878-1934) gave the name “Insulin” in 1909. The most important substance for carbohydrate metabolism is formed in this islet cells; its failure leads to diabetes with increase of blood sugar with its life-threatening impact phenomena. Today, you know that the hormone is produced by the beta cells in the pancreas and is necessary for the body’s regulation of glucose metabolism and the utilization of glucose. If no more insulin is produced, the feed from the outside must be made. It is estimated that more than 400 scientists that were employed in the years between 1889 and 1922, to reproduce a pancreatic extract and to be exposed as a drug.

The arguably the most successful explorers of pancreatic hormone before Frederick Banting and Charles best was the German internist George Ludwig Zuelzer (1870-1949). On 21 June 1906, he performed the first injection with an isolated from him and produced by the Berlin company Schering pancreatic extract called “Acomatol” to the people. General condition and appetite of previously emaciated and comatose 50th Mann’s improved constantly. Only after the stock of the product was used up, the patient died. Attempts primarily to business to dogs and people, often fatal. After Schering had withdrawn, also Zuelzer gave up his attempts. “As somehow secure results despite energetic efforts (…)” “not available” was in the years after the 1st World War in other countries of the view that further research were somewhat successful. This was the State of insulin research around 1921, Banting and best began their experiments.

Frederick Banting, the youngest of six children of a Canadian farmer family, began his studies of theology after the University, but soon changed to medicine orthopedist to be and finished his studies in 1916 at the University of Toronto with Dr. med. successfully off. During the 1st World War, was active as a military physician for the Allied troops in France Banting, won bravery awards, was Captain, and came to Toronto after being wounded as a doctor at the hospital. in 1920, he moved to London (Canada) and commenced the practice of orthopaedic, which however had little traffic here. In his free time he assumed therefore repetition courses at his former alma mater in Toronto and worked into the physiology, where particularly the literature on diabetes mellitus interested him, a childhood friend he had died at the. This, he came to believe that the previous failures in the isolation experiments of insulin on due were that the exocrine pancreatic digestive enzymes already attack the (at that time still hypothetical) insulin during the isolation and made it inoperable. Banting took the view, binding the pancreatic received close to the duodenum (duodenum) could prevent escape of exocrine pancreatic enzymes. Because he had no suitable laboratory, he presented his idea of early 1921 MacLeod, who was a leading American expert in the field of carbohydrate metabolism and was head of the physiological Institute at the University of Toronto. Banting asked MacLeod to make him one of his students in the summer months to allow the use of a laboratory, and him. MacLeod but doubted the chances of success of Bantingschen concept, granted him but the laboratory stay in his institution and also a student staff.

This staff was Charles best, who thus received one of the rare opportunities to participate at an early age in an epochal medical development. Best, son of a Canadian doctor, had studied in 1916 also at the University of Toronto medical, as Sanitätsgehilfe worked temporarily in military service during the second world war, and was in 1918 at the University returned to continue his studies with a focus on physiology and biochemistry. In the meantime, he worked as an unpaid employee in the laboratory of MacLeod. When his teacher asked him to assist Banting for several months in the isolation of Inselzellhormons best saw an opportunity to expand his future professional commitment.

In mid 1921, Frederick Banting and Charles best began to isolate extracts of pancreas for the treatment of diabetes mellitus with personal financial sacrifice. The two managed to produce a substance, which they held for insulin from glands of dead dogs and unborn calves. On 30 July 1921 they were lower for the first time decisively a pankreatektomierten dog’s blood sugar levels thus after intravenous injection. Of countless animal and own attempts, the two researchers tested not only the effectiveness, but also the toxicity that caused most of all the foreign protein of insulin extracts.

The first application to a patient took place on the 11 January 1922, but had to be canceled due to toxic effects.

MacLeod moved to the renowned chemist Collip developed a process for the purification of foreign protein. The insulin product turned out to already in the spring of 1922 as therapeutic use and effective. The Canadian pharmaceutical company Lilly established it in larger quantities and started the clinical success of pancreatic hormone called insulin. The 13-year old Leonhard Thomson in Toronto, who was hospitalized in January 1922, the Toronter University Hospital with severe diabetes disorders, and was thus saved from certain death was one of the first beneficiaries of the new active substance.

The response to the discovery of the Canadian research group liked around the world. In rare tack, the Nobel Committee in Stockholm awarded the Nobel prize because already a year later. In July 1923, a feverish research activity on the properties and clinical applications of pancreatic hormone used in Germany. In November of the same year, the German insulin Committee recommended the preparation of the company Bayer in Elberfeld for industrial-scale production.

Frederick Banting and Charles best renounced any patent revenues which earned them additional respect and recognition.

Banting was popular in Canada as one of the leading researchers and Kaon end of 1923 and succeeded MacLeod, who in turn took over a professorship at the University of Aberdeen in 1928. in 1932, the University of Toronto founded an independent Research Institute, which was given the name of Banting and best Institute and should be devoted to the development of the insulin and diabetes mellitus research. Banting in the noble stand was appointed in 1934; at the height of his success, he died as a surgeon in a plane crash.

Best received a professorship at the University of Toronto in 1929. After Bantings death, he was Director of Banting-and best Research Institute. He also edited mainly specialties of the muscle and exercise physiology and of carbohydrate metabolism and was instrumental in many individual discoveries. In the advanced age he suffered in diabetes mellitus.

The administration of insulin is essential for granted today for diabetics. In Germany alone, around five million people suffer from diabetes; almost two million patients are “insulin in batches”. The industrial production of insulin began end of 1923. Of these, the first Insulinpräparate were still simple extracts of pancreas of cattle, which contained other pancreatic hormones and impurities. As a result of pollution and immune reactions to animal protein later even a residual risk existed, until 1982 for the first time human insulin was developed. To do so was introduced the necessary genetic information in the genetic material of bacteria that produce this hormone. Thus the fear of a global shortage of insulin was not – after all it took for the insulin treatment of a single patient so far every year, around 50 animals.

Sources:

Eckart, W.U.: doctors dictionary. Springer, Heidelberg 2006