Linked Life Data

1659629

Source:http://linkedlifedata.com/resource/pubmed/id/1659629

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1-2
pubmed:dateCreated
1992-1-2
pubmed:abstractText
In order to obtain information about the activation of macrophages (M phi s) during photodynamic therapy (PDT), the influence of Photofrin II (Pf II) on the viability of thioglycollate-elicited murine M phi s and the subsequent generation of superoxide anion was studied. Irradiations were performed at an energy density of 5 J cm-2, a power density of 150 mW cm-2 and a wavelength of 405 nm. Viability of M phi s was assessed using the acridine orange-ethidium bromide assay. Superoxide anion generation was determined using ferricytochrome c (cyt c) and nitroblue tetrazolium (NBT) reduction. Our results indicate that the M phi s are highly susceptible to PDT as their viability is decreased to approximately 30% by 1 microgram ml-1 Pf II at the energy density indicated above. Within the first 30 min of addition of the photosensitizer, a reducing agent is generated intracellularly by the stimulation of the M phi s. An extracellular release of superoxide anion does not occur, as measured by the cyt c assay. Preincubation of the cells for 1 or 24 h with Pf II and a second challenge with phorbol myristate acetate (PMA) does not enhance the reduction of NBT. Thus, Pf II exerts an immediate effect on the M phi s which could be interpreted as a first step for subsequent reactions.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
1011-1344
pubmed:author
pubmed:issnType
Print
pubmed:volume
10
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
133-45
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1991
pubmed:articleTitle
Activation of macrophages by Photofrin II during photodynamic therapy.
pubmed:affiliation
Department of Surgery, Beckman Laser Institute and Medical Clinic, University of California, Irvine 92715.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S.