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NPH insulin is made by mixing regular insulin and protamine in exact proportions with zinc and phenol such that a neutral-pH is maintained and crystals form. [1] There are human and pig insulin based versions. [1] Protamine insulin was first created in 1936 and NPH insulin in 1946. [1] It is on the World Health Organization's List of Essential ...
As a medication, insulin is any pharmaceutical preparation of the protein hormone insulin that is used to treat high blood glucose. [6] Such conditions include type 1 diabetes, type 2 diabetes, gestational diabetes, and complications of diabetes such as diabetic ketoacidosis and hyperosmolar hyperglycemic states. [6]
Regular insulin, also known as neutral insulin and soluble insulin, is a type of short-acting medical insulin. [2] It is used to treat type 1 diabetes , type 2 diabetes , gestational diabetes , and complications of diabetes such as diabetic ketoacidosis and hyperosmolar hyperglycemic states . [ 5 ]
Hagedorn discovered that the addition of protamine to insulin caused the insulin to form microscopic clumps. These clumps took longer to dissolve into the bloodstream. This complex of protamine and insulin is known as NPH (neutral protamine Hagedorn) insulin. It is one of the earliest example of engineering drug delivery.
Novolin is the brand name of three distinct insulin-containing products [1] manufactured by Novo Nordisk: [2] Novolin 70/30, an insulin preparation containing mixed NPH and regular insulin, respectively; Novolin N, an insulin preparation containing NPH insulin; Novolin R, an insulin preparation containing regular insulin
Insulin was the first peptide hormone discovered. [17] Frederick Banting and Charles Best, working in the laboratory of John Macleod at the University of Toronto, were the first to isolate insulin from dog pancreas in 1921. Frederick Sanger sequenced the amino acid structure in 1951, which made insulin the first protein to be fully sequenced. [18]
The onset of action of subcutaneous insulin glargine is somewhat slower than NPH human insulin. It is clear solution as there is no zinc in formula. [9] [better source needed] The biosimilar insulin glargine-yfgn (Semglee) was approved for medical use in the United States in July 2021, [10] and in the European Union in March 2018. [11]
All protamine precipitated as the double salt of platinum and was free of sulfur and phosphorus. Protamine sulfate was originally made from the sperm of salmon. The protamine of salmon, later named “salmine”, which can be extracted with hydrochloric acid and precipitated with platinum chloride, corresponds to about 26.8 % of the dried sperm.