{"id":50491,"date":"2021-06-18T21:20:58","date_gmt":"2021-06-18T20:20:58","guid":{"rendered":"https:\/\/blogs.bmj.com\/bmj\/?p=50491"},"modified":"2021-06-25T16:00:27","modified_gmt":"2021-06-25T15:00:27","slug":"jeffrey-aronson-when-i-use-a-word-black-swans-in-biochemistry","status":"publish","type":"post","link":"https:\/\/blogs.bmj.com\/bmj\/2021\/06\/18\/jeffrey-aronson-when-i-use-a-word-black-swans-in-biochemistry\/","title":{"rendered":"Jeffrey Aronson: When I Use a Word . . . Black swans in biochemistry"},"content":{"rendered":"<p><span style=\"font-weight: 400\">Continuing my search for biomedical black swans, based on the words newly cited in the <\/span><i><span style=\"font-weight: 400\">Oxford English Dictionary<\/span><\/i><span style=\"font-weight: 400\"> (<\/span><i><span style=\"font-weight: 400\">OED<\/span><\/i><span style=\"font-weight: 400\">) from 1970 to 2020, I now turn to terms relevant to biochemistry, of which I have surveyed 140 or so. About 90% derive from Greek or Latin, in some cases as hybrids, Greek outnumbering Latin by about 2:1. Most of the rest are abridgements of one sort or another and three are eponyms or toponyms. One is from Hebrew.<\/span><\/p>\n<p><span style=\"font-weight: 400\">The abridgements are a mixed bag (Table 1). Different types of abridgement are often called \u201cacronyms\u201d, but an acronym is only one variety of abridgement; the different types are detailed at the foot of the table.<\/span><\/p>\n<p><b>Table 1.<\/b><span style=\"font-weight: 400\"> Biochemical terms derived by abridgement since 1970, with dates of first citations in the <\/span><i><span style=\"font-weight: 400\">OED<\/span><\/i><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-50492\" src=\"https:\/\/blogs.bmj.com\/bmj\/files\/2021\/06\/aronson_18_june_2021.jpg\" alt=\"\" width=\"555\" height=\"351\" srcset=\"https:\/\/blogs.bmj.com\/bmj\/files\/2021\/06\/aronson_18_june_2021.jpg 555w, https:\/\/blogs.bmj.com\/bmj\/files\/2021\/06\/aronson_18_june_2021-300x190.jpg 300w\" sizes=\"auto, (max-width: 555px) 100vw, 555px\" \/><\/p>\n<p><span style=\"font-weight: 400\">*There are several different types of abridgement:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Initialism\u2014a single letter standing for a whole word, or a string of such letters; B, for instance, stands for bachelor, baron, and boron, among others, b.d. for bis [in] die, and BMJ for the <\/span><a href=\"https:\/\/www.buildersmerchantsjournal.net\/\"><span style=\"font-weight: 400\">Builders Merchants Journal<\/span><\/a><span style=\"font-weight: 400\">; in such cases the letters are pronounced separately<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Acronym\u2014a specific type of abbreviation that can be, and is, read as a word; for example, AID, AIDS, and ARC<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Quasi-acronym\u2014an initialism adapted to be an acronym; for example, the initialism CABG is read as if it were the word \u201ccabbage\u201d; the initialism QALY can be regarded as a quasi-acronym, since it is pronounced like a real word\u00a0<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Clipping\u2014 a coinage formed by removing the end of a word; for example, \u201ccarbo\u201d for carbohydrate; pronounced like a real word<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Contraction\u2014a coinage formed by removing a section or sections of a word and pronounced as the original word is ((for example, Dr, Mr), or as an initialism (for example, ECG), or as if it were itself a word (for example, trp)<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Symbols\u2014signs that stand for words; for example, 1, 2, 3, @, \u00a3<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Hybrid\u2014a combination of different types of abridgement, such as part initialism, part symbol<\/span><\/li>\n<li style=\"font-weight: 400\"><a href=\"http:\/\/blogs.bmj.com\/bmj\/2018\/04\/27\/jeffrey-aronson-when-i-use-a-word-how-to-create-neologisms\"><span style=\"font-weight: 400\">Portmanteau word<\/span><\/a><span style=\"font-weight: 400\">\u2014a blend of two words; for example, Botox, from Bo[tulinum] tox[in]<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400\">There is an unusual number of hybrid forms among these abridgements, but perhaps the most unusual is ghrelin, the name that in 1999 <\/span><a href=\"https:\/\/www.nature.com\/articles\/45230\"><span style=\"font-weight: 400\">Kojima<\/span><\/a><span style=\"font-weight: 400\"> and colleagues gave to a peptide hormone that stimulates secretion of growth hormone from the pituitary and increases appetite. They derived the name from the initialism GH, for growth hormone, the contraction rel\u2013 from releasing, and the general suffix \u2013in, commonly given to endogenous substances. Small synthetic molecules called growth-hormone secretagogues (GHSs) were known to stimulate release of growth hormone from the pituitary, acting through a G-protein-coupled receptor, GHS-R, thought to have an endogenous ligand not yet identified. They therefore sought such a ligand and found it in rat stomachs. They identified it as a peptide of 28 amino acids and showed that the acylated peptide specifically released growth hormone, both in vivo and in vitro, and that human ghrelin was homologous with rat ghrelin, apart from two amino acids. They concluded that release of growth hormone from the pituitary might be regulated not only by hypothalamic growth hormone releasing hormone (GHRH), but also by ghrelin. \u201cGhrelin\u201d also gives us <\/span><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/21167151\/\"><span style=\"font-weight: 400\">hypoghrelinaemia<\/span><\/a><span style=\"font-weight: 400\">, <\/span><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/27445651\/\"><span style=\"font-weight: 400\">ghrelino-resistance<\/span><\/a><span style=\"font-weight: 400\">, <\/span><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/25905392\/\"><span style=\"font-weight: 400\">ghrelinoma<\/span><\/a><span style=\"font-weight: 400\">, and <\/span><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/33605550\/\"><span style=\"font-weight: 400\">ghretropins<\/span><\/a><span style=\"font-weight: 400\">.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Then, almost as an afterthought, they added an etymology to the abstract of their paper. The combination ghr\u2013 at the start of a word is rare; an exception is \u201cghrosky\u201d, a hairy troll (use it the next time you\u2019re intemperately attacked on Twitter). They therefore justified the coinage by recourse to an IndoEuropean root GHRE, which means to grow, and from which we derive words such as grow and growth, green, grass, and grasshopper, a name that has been given not only to the familiar insect but also to a delicious green-coloured cocktail made from one-third green cr\u00e8me de menthe, one third white cr\u00e8me de cacao, and one third cream.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">Like many other biomedical discoveries that are marked by the appearance in the dictionary of the terms that describe them, ghrelin was discovered through a logical process of planned experiments, in which black swans did not feature.<\/span><\/p>\n<p><span style=\"font-weight: 400\">In 1987 Michael Zasloff in Bethesda noticed that when ovaries were removed under non-sterile conditions from anaesthetized African clawed toads<\/span><i><span style=\"font-weight: 400\"> Xenopus laevis<\/span><\/i><span style=\"font-weight: 400\">, the wounds rarely became infected and the scars almost always healed normally. Furthermore, there was little evidence of inflammation or other cellular reactions at operative sites. &#8220;The manner in which wound healing occurs in this animal,&#8221; he wrote, &#8220;suggested that there might be a &#8216;sterilizing&#8217; activity in the skin.&#8221; This chance observation led him to look for substances that might have such activity, and he discovered a family of antimicrobial peptides in purified <\/span><i><span style=\"font-weight: 400\">Xenopus laevis<\/span><\/i><span style=\"font-weight: 400\"> skin. He hypothesized that they constituted a previously unrecognized antimicrobial defence system. It <\/span><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC7692786\/\"><span style=\"font-weight: 400\">appears<\/span><\/a><span style=\"font-weight: 400\"> that these peptides not only protect against invasion by micro-organisms, but also neutralize endotoxins and encourage chemotaxis and wound healing.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Zasloff called the peptides magainins, from the Hebrew word magen, a shield (Figure 1). It comes from the triliteral Semitic root GNN, which means to cover or surround and which also gives us the word genie, from jinn, an Arabic word for an order of demons or invisible beings.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-50493\" src=\"https:\/\/blogs.bmj.com\/bmj\/files\/2021\/06\/aronson_18_june_2021_2.jpg\" alt=\"\" width=\"728\" height=\"476\" srcset=\"https:\/\/blogs.bmj.com\/bmj\/files\/2021\/06\/aronson_18_june_2021_2.jpg 728w, https:\/\/blogs.bmj.com\/bmj\/files\/2021\/06\/aronson_18_june_2021_2-300x196.jpg 300w, https:\/\/blogs.bmj.com\/bmj\/files\/2021\/06\/aronson_18_june_2021_2-640x418.jpg 640w\" sizes=\"auto, (max-width: 728px) 100vw, 728px\" \/><\/p>\n<p><span style=\"font-weight: 400\">Magainins are true black swans., discovered by acute observation of an unexpected finding. But perhaps, since they were discovered in the skin of <\/span><i><span style=\"font-weight: 400\">Xenopus<\/span><\/i><span style=\"font-weight: 400\"> toads, we should take a leaf out of Juvenal\u2019s <\/span><a href=\"http:\/\/www.thelatinlibrary.com\/juvenal\/2.shtml\"><span style=\"font-weight: 400\">second satire<\/span><\/a><span style=\"font-weight: 400\"> and instead call them ranas nigras, black frogs.<\/span><\/p>\n<p style=\"text-align: left\"><span style=\"font-weight: 400\"><em><strong>Jeffrey Aronson<\/strong>\u00a0is a clinical pharmacologist, working in the Centre for Evidence Based Medicine in Oxford&#8217;s Nuffield Department of Primary Care Health Sciences. He is also president emeritus of the British Pharmacological Society.<\/em><\/span><\/p>\n<p style=\"text-align: left\"><strong>Competing interests:<\/strong> none declared.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-50494\" src=\"https:\/\/blogs.bmj.com\/bmj\/files\/2021\/06\/aronson_18_june_2021_integer.jpg\" alt=\"\" width=\"698\" height=\"1594\" srcset=\"https:\/\/blogs.bmj.com\/bmj\/files\/2021\/06\/aronson_18_june_2021_integer.jpg 698w, https:\/\/blogs.bmj.com\/bmj\/files\/2021\/06\/aronson_18_june_2021_integer-131x300.jpg 131w, https:\/\/blogs.bmj.com\/bmj\/files\/2021\/06\/aronson_18_june_2021_integer-448x1024.jpg 448w, https:\/\/blogs.bmj.com\/bmj\/files\/2021\/06\/aronson_18_june_2021_integer-673x1536.jpg 673w, https:\/\/blogs.bmj.com\/bmj\/files\/2021\/06\/aronson_18_june_2021_integer-640x1462.jpg 640w\" sizes=\"auto, (max-width: 698px) 100vw, 698px\" \/><\/p>\n<p>1) <a href=\"https:\/\/www.youtube.com\/watch?v=vNTSugyS038\">https:\/\/www.youtube.com\/watch?v=vNTSugyS038<\/a><br \/>\n2) <a href=\"https:\/\/blogs.bmj.com\/bmj\/2020\/04\/24\/jeffrey-aronson-when-i-use-a-word-exponential-finances-increasing-decreasing\/\">https:\/\/blogs.bmj.com\/bmj\/2020\/04\/24\/jeffrey-aronson-when-i-use-a-word-exponential-finances-increasing-decreasing\/<\/a><br \/>\n3) <a href=\"https:\/\/blogs.bmj.com\/bmj\/2021\/06\/11\/jeffrey-aronson-when-i-use-a-word-black-swans-in-microbiology\/\">https:\/\/blogs.bmj.com\/bmj\/2021\/06\/11\/jeffrey-aronson-when-i-use-a-word-black-swans-in-microbiology\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Continuing my search for biomedical black swans, based on the words newly cited in the Oxford English Dictionary (OED) from 1970 to 2020, I now turn to terms relevant to [&#8230;]<\/p>\n<p><a class=\"btn btn-secondary understrap-read-more-link\" href=\"https:\/\/blogs.bmj.com\/bmj\/2021\/06\/18\/jeffrey-aronson-when-i-use-a-word-black-swans-in-biochemistry\/\">More&#8230;<\/a><\/p>\n","protected":false},"author":419,"featured_media":38359,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5762],"tags":[],"class_list":["post-50491","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-jeff-aronsons-words"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Jeffrey Aronson: When I Use a Word . . . 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