porphyrin

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por·phy·rin

 (pôr′fə-rĭn)
n.
Any of various organic compounds containing four pyrrole rings, occurring universally in protoplasm, and functioning as a metal-binding cofactor in hemoglobin, chlorophyll, and certain enzymes.

[Greek porphurā, purple dye, purple garment; see purple + -in.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

porphyrin

(ˈpɔːfɪrɪn)
n
(Biochemistry) any of a group of pigments occurring widely in animal and plant tissues and having a heterocyclic structure formed from four pyrrole rings linked by four methylene groups
[C20: from Greek porphura purple, referring to its colour]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

por•phy•rin

(ˈpɔr fə rɪn)

n.
a dark red, photosensitive pigment consisting of four pyrrole rings linked by single carbon atoms: a component of chlorophyll, heme, and vitamin B12.
[1905–10; < Greek porphýr(a) purple]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.porphyrin - any of various pigments distributed widely in living tissues
pigment - dry coloring material (especially a powder to be mixed with a liquid to produce paint, etc.)
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations

por·phy·rin

n. porfirina, compuesto que ocurre en el protoplasma y que es la base de los pigmentos respiratorios en los animales y las plantas.
English-Spanish Medical Dictionary © Farlex 2012
References in periodicals archive ?
One type of bacteria commonly found in cases of periodontal disease, Porphyromonas gingivalis, has also been found in the brains of patients with Alzheimer's disease.
The trial represents the first large, randomized late-stage clinical study evaluating the gingipain hypothesis, which is based upon growing evidence that the bacterium most commonly associated with chronic periodontal disease, Porphyromonas gingivalis, plays a key role in the development of AD, given its identification in the brains of AD patients and ability to cause neurodegeneration, inflammation, and other pathology associated with Alzheimer's in animal models.
Porphyromonas gingivalis, a gram-negative anaerobic bacterium that secretes a toxic enzyme called gingipain, has been identified as the main culprit behind a range of periodontal problems, from mild gingivitis (which causes reversible inflammation) to chronic periodontitis (which can destroy bone and lead to tooth loss).
The formation of biofilm and adherence to oral epithelial cells can be affected negatively by capsaicin on Porphyromonas gingivalis (La et al., 2010; Gerits et al., 2017).
The bacterium, Porphyromonas gingivalis, is the bad actor involved in periodontitis, the most serious form of gum disease.
Gum disease can cause Alzheimer's UNLIKELY Dr David Reynolds, chief scientific officer from Alzheimer's Research UK, said: "While some studies have found higher levels of a bacteria linked to gum disease Porphyromonas gingivalis in the brain during Alzheimer's, it remains unclear what role, if any, it plays.
Dr David Reynolds, chief scientific officer from Alzheimer's Research UK, says: "While some studies have found higher levels of a bacteria linked to gum disease, Porphyromonas gingivalis, in the brain during Alzheimer's, it remains unclear what role, if any, it plays.
Other experiments have produced evidence that one type of bacteria commonly found in cases of periodontitis - Porphyromonas gingivalis - can be found in the brains of individuals with Alzheimer's.
Actinobacillus actinomycetemcomitans and Porphyromonas gingivalis in human periodontal disease: occurrence and treatment.
(27,28) A recent study by Wei Zhou et al was the first of its kind to evaluate the effects of melatonin and a melatonin receptor agonist Ramelteon against Porphyromonas gingivalis. (29) They concluded that both melatonin and its receptor agonist were capable of inhibiting biofilm formation, decreased the viability of Porphyromonas gingivalis, showed an antiinflammatory response by acting on the lipopolysaccharide.
Bowel bacteria such as Proteus mirabilis, Escherichia coli, Mycoplasma, Klebsiella pneumonia and Porphyromonas gingivalis all have a strong link to inflammatory arthritis.
The bacteria, Porphyromonas gingivalis, known as Pg, causes the gum infection chronic periodontitis, causing chronic inflammation and potential loss of teeth, reported CNN.