Linked Life Data

9506459

Source:http://linkedlifedata.com/resource/pubmed/id/9506459

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1998-4-29
pubmed:abstractText
We investigated whether recombinant human (rHu-IFN-beta) (IFN-beta) could counteract the inhibition of natural killer (NK) activity caused by antitumor agents. Peripheral blood lymphocytes (PBL) were incubated with different antitumor agents alone or in combination with IFN-beta for 3 days and then tested in a cytotoxicity assay against the K562 cell line. The following drugs were used, all of which caused a dose-dependent inhibition of NK activity: etoposide, camptothecin, doxorubicin, cis-DDP, tallimustine, and L-PAM. Concomitant treatment with (1000 U/ml) IFN-beta counteracted the inhibitory effect of etoposide and camptothecin but had no consistent effect on the inhibition mediated by the other drugs. Mean values of inhibition of NK activity at 1 microM camptothecin was 48%+/-3.4% and with IFN-beta was 10%+/-4.9%. With 100 microM etoposide, mean value of inhibition was 78%+/-3.3%, and with IFN-beta, it was 18%+/-1.5%. Cell viability, assessed by vital dye exclusion, and drug uptake, assessed with radiolabeled etoposide, were similar in cells treated with or without IFN-beta. The protective effect of IFN-beta on NK function was rather selective, as IFN-beta did not counteract the drug-mediated inhibition of PBL proliferation when stimulated by phytohemagglutinin (PHA). Other cytokines, IFN-alpha, IFN-gamma, and interleukin-2 (IL-2), had similar protective effect, although IFN-beta, was slightly more potent. On the other hand, IL-6, a cytokine sharing some properties with IFNs was ineffective. Camptothecin inhibited the expression of mRNA for granzyme B, a lytic protein involved in lymphoid-mediated cytotoxicity. Combined treatment with IFN-beta restored-at least in part-the transcription of granzyme B mRNA. These results show that the immunosuppressive effect of some antitumor agents could be partly counteracted by treatment with IFN-beta.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
http://linkedlifedata.com/resource/pubmed/chemical/Antineoplastic Agents, http://linkedlifedata.com/resource/pubmed/chemical/Camptothecin, http://linkedlifedata.com/resource/pubmed/chemical/Cisplatin, http://linkedlifedata.com/resource/pubmed/chemical/Distamycins, http://linkedlifedata.com/resource/pubmed/chemical/Doxorubicin, http://linkedlifedata.com/resource/pubmed/chemical/Etoposide, http://linkedlifedata.com/resource/pubmed/chemical/Immunosuppressive Agents, http://linkedlifedata.com/resource/pubmed/chemical/Interferon-beta, http://linkedlifedata.com/resource/pubmed/chemical/Melphalan, http://linkedlifedata.com/resource/pubmed/chemical/Nitrogen Mustard Compounds, http://linkedlifedata.com/resource/pubmed/chemical/Recombinant Proteins, http://linkedlifedata.com/resource/pubmed/chemical/tallimustine
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
1079-9907
pubmed:author
pubmed:issnType
Print
pubmed:volume
18
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
87-93
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1998
pubmed:articleTitle
IFN-beta partially counteracts inhibition of natural killer activity induced by some antitumor agents.
pubmed:affiliation
Department of Immunology and Cell Biology, Istituto Mario Negri, Milano, Italy.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't