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Showing 1 to 12 of 13 entries
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Structure of cobalt protoporphyrin chloride and its dimer, observation and DFT modeling.

Physical chemistry chemical physics : PCCP

de la Lande A, Ha-Thi MH, Chen S, Soep B, Shafizadeh N.
PMID: 27270590
Phys Chem Chem Phys. 2016 Jun 22;18(25):16700-8. doi: 10.1039/c6cp02304e.

In this article we present a joint study by time-of-flight mass spectroscopy and density functional theory of cobalt protoporphyrin dimer complexes. The main novelty of the experimental part is to reveal the formation of porphyrin dimers that eventually include...

Cell metabolic changes of porphyrins and superoxide anions by anthracene and benzo(a)pyrene.

Environmental toxicology and pharmacology

Uribe-Hernández R, Pérez-Zapata AJ, Vega-Barrita ML, Ramón-Gallegos E, Amezcua-Allieri MA.
PMID: 21791370
Environ Toxicol Pharmacol. 2008 Sep;26(2):237-40. doi: 10.1016/j.etap.2008.05.002. Epub 2008 May 31.

The aim of this work was to evaluate the induction of protoporphyrins IX (PpIX) activity and superoxide anions (SO) in human leukocytes exposed to anthracene (ANT) and benzo(a)pyrene (B(a)P). The leukocyte LC(50)s for both hydrocarbons and the PpIX accumulation...

Effect of Oral Contraceptives on Faecal Porphyrins.

Indian journal of dermatology, venereology and leprology

Sidhu SK, Arora JG, Handa F, Sidhu KS.
PMID: 28211434
Indian J Dermatol Venereol Leprol. 1981 May-Jun;47(3):138-141.

A quantitative assay -of faecal prophyrins was undertaken by spectrophotometric method of Rimington in forty women, of child-bearing age Thirty women- On Oral contraceptives constituted the study group and ten on other methods of contrace on served as controls....

Prolonged Allogeneic Islet Graft Survival by Protoporphyrins.

Cell transplantation

Pileggi A, Molano RD, Berney T, Ichii H, Jose SS, Zahr E, Poggioli R, Linetsky E, Ricordi C, Inverardi L.
PMID: 28871856
Cell Transplant. 2005 Feb/Mar;14(2):85-96. doi: 10.3727/000000005783983160.

Transplantation of islets of Langerhans in patients with type 1 diabetes allows for improved metabolic control and insulin independence. The need for chronic immunosuppression limits this procedure to selected patients with brittle diabetes. Definition of therapeutic strategies allowing permanent...

Reversal of alpha,alpha'-Dipyridyl-induced Porphyrin Synthesis in Etiolated and Greening Red Kidney Bean Leaves.

Plant physiology

Vlcek LM, Gassman ML.
PMID: 16660973
Plant Physiol. 1979 Sep;64(3):393-7. doi: 10.1104/pp.64.3.393.

The chemical induction of porphyrin synthesis has been investigated in etiolated and greening leaves of Phaseolus vulgaris L. var. Red Kidney. When these leaves are incubated in darkness with solutions of transition metal ion chelators such as alpha,alpha'-dipyridyl, 1,10-phenanthroline,...

A crystallographic study of haem binding to ferritin.

Acta crystallographica. Section D, Biological crystallography

Précigoux G, Yariv J, Gallois B, Dautant A, Courseille C, d'Estaintot BL.
PMID: 15299370
Acta Crystallogr D Biol Crystallogr. 1994 Sep 01;50:739-43. doi: 10.1107/S0907444994003227.

Ferritin, the iron-storage protein, binds porphyrins, metalloporphyrins and the fluorescent dyes ANS (8-anilino-1-naphthalenesulfonic acid) and TNS (2-p-toluidinyl-6-naphthalenesulfonic acid), similarly to apo-myoglobin. Octahedral crystals of horse-spleen apo-ferritin (HSF; 174 amino acids) complexes prepared by the addition of haem, hematoporphyrin or...

Fluorimetric detection of protoporphyrins as an indicator for quality monitoring of fresh intact pork meat.

Meat science

Schneider J, Wulf J, Surowsky B, Schmidt H, Schwägele F, Schlüter O.
PMID: 22063874
Meat Sci. 2008 Dec;80(4):1320-5. doi: 10.1016/j.meatsci.2008.06.007. Epub 2008 Jun 19.

In fresh meat production fast and non-destructive quality monitoring along the distribution chain is a key aspect to guaranteeing high quality and safe products for consumption. The applicability of fluorescence spectroscopy using protoporphyrins as indicators for meat ageing was...

Liver involvement in patients with erythropoietic protoporphyria.

Digestive and liver disease : official journal of the Italian Society of Gastroenterology and the Italian Association for the Study of the Liver

Wensink D, Coenen S, Wilson JHP, Wagenmakers MAEM, Langendonk JG.
PMID: 34475006
Dig Liver Dis. 2021 Aug 30; doi: 10.1016/j.dld.2021.08.007. Epub 2021 Aug 30.

BACKGROUND: In erythropoietic protoporphyria (EPP), which presents with severe painful phototoxicity, progressive deposition of protoporphyrins in hepatocytes and bile canaliculi may result in liver disease. Clinically EPP related liver disease ranges from mildly elevated liver enzymes to cirrhosis and...

Assessment of occupational exposures to multiple metals with urinary porphyrin profiles.

Journal of integrated OMICS

de Andrade VL, Mateus ML, Aschner M, Dos Santos AM.
PMID: 30666282
J Integr OMICS. 2018 Jun;8(1). doi: 10.5584/jiomics.v8i1.216. Epub 2018 Apr 16.

Chronic occupational exposures to low levels of metal mixtures necessitates biomonitoring of exposed workers. However, a single biomarker (BM) is rarely sufficient to ascertain the exposure of an individual to a complex mixture, with multiparameter analysis of the same...

Electrocatalytic Nitrate Reduction by a Cobalt Protoporphyrin Immobilized on a Pyrolytic Graphite Electrode.

Langmuir : the ACS journal of surfaces and colloids

Shen J, Birdja YY, Koper MT.
PMID: 26154347
Langmuir. 2015 Aug 04;31(30):8495-501. doi: 10.1021/acs.langmuir.5b00977. Epub 2015 Jul 21.

A series of simple molecular catalysts, i.e., Co(III), Fe(II), Ni(II), Cu(II), and Rh(II) protoporphyrins (metal-PP), directly adsorbed on pyrolytic graphite have been utilized for catalyzing the electrochemical reduction of nitrate. These catalysts are studied by combining cyclic voltammetry with...

Reduction in porphyrin excretion as a sensitive indicator of lead toxicity in primary cultures of adult rat hepatocytes.

Toxicology in vitro : an international journal published in association with BIBRA

Quintanilla-Vega B, Hernandez A, Mendoza-Figueroa T.
PMID: 20650251
Toxicol In Vitro. 1996 Dec;10(6):675-83. doi: 10.1016/s0887-2333(96)00043-4.

Alterations of specific metabolic pathways can be used as sensitive indicators of toxicity by chemicals and can give valuable information on the mechanism(s) involved. Short-term effects of lead on hepatic haem biosynthesis were studied in an in vitro system....

Metallo Protoporphyrin Functionalized Microelectrodes for Electrocatalytic Sensing of Nitric Oxide.

American journal of biomedical sciences

Li CZ, Alwarappan S, Zhang W, Scafa N, Zhang X.
PMID: 20526418
Am J Biomed Sci. 2009 May 22;1(3):274-282. doi: 10.5099/aj090300274.

Nitric oxide (NO) has been considered as an important bio-regulatory molecule in the physiological process. All the existing methods often employed for NO measurement are mainly indirect and not suitable for in vivo conditions. In this paper, we report...

Showing 1 to 12 of 13 entries