Sökning: id:"swepub:oai:DiVA.org:uu-93005" >
Overexpression of e...
-
Babiker, Adil A.Uppsala universitet,Institutionen för onkologi, radiologi och klinisk immunologi
(författare)
Overexpression of ecto-protein kinases in prostasomes of metastatic cell origin
- Artikel/kapitelEngelska2006
Förlag, utgivningsår, omfång ...
-
Wiley,2006
-
printrdacarrier
Nummerbeteckningar
-
LIBRIS-ID:oai:DiVA.org:uu-93005
-
https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-93005URI
-
https://doi.org/10.1002/pros.20268DOI
Kompletterande språkuppgifter
-
Språk:engelska
-
Sammanfattning på:engelska
Ingår i deldatabas
Klassifikation
-
Ämneskategori:ref swepub-contenttype
-
Ämneskategori:art swepub-publicationtype
Anmärkningar
-
BACKGROUND:Prostasomes are secretory granules produced, stored, and released by the glandular epithelial cells of the prostate. They express numerous enzymes whose physiological roles have so far not been fully evaluated. In this study, we investigated the expression and function of prostasomal protein kinases and ATPase.METHODS:The protein kinase activities of prostasomes isolated from seminal fluid and malignant prostate cell lines (PC-3, DU145, and LNCaP) were investigated using the model phosphorylation substrates histone and casein, as well as the plasma proteins C3 and fibrinogen, in combination with specific protein kinase inhibitors. The prostasomal ATPase activity was also evaluated. The expression of protein kinases and ATPase on prostasomes was verified by flow cytometry.RESULTS:Prostasomes (intact or solubilized with octylglucoside or saponin) from prostate cancer cells had higher expression of protein kinases A, C, and casein kinase II compared to prostasomes isolated from seminal plasma, resulting in higher phosphorylation of both exogenous and endogenous substrates. Using intact prostasomes, it was found that prostasomes of metastatic origin had lower ATPase activity, resulting in higher residual ATP available for the phosphorylation reaction. Finally, complement component C3 and fibrinogen (two proteins whose activities are modulated by phosphorylation) were identified as physiologically relevant phosphorylation substrates.CONCLUSIONS:These results indicate that prostasomes are capable of modifying proteins possibly involved in the innate response by extracellular phosphorylation mediated by ecto-kinases. This is a novel mechanism by which prostatic malignant cells may interact with their environment.
Biuppslag (personer, institutioner, konferenser, titlar ...)
-
Ronquist, GunnarUppsala universitet,Klinisk kemi
(författare)
-
Nilsson, BoUppsala universitet,Institutionen för onkologi, radiologi och klinisk immunologi(Swepub:uu)bonils
(författare)
-
Nilsson Ekdahl, KristinaUppsala universitet,Institutionen för onkologi, radiologi och klinisk immunologi(Swepub:uu)krisnil
(författare)
-
Uppsala universitetInstitutionen för onkologi, radiologi och klinisk immunologi
(creator_code:org_t)
Sammanhörande titlar
-
Ingår i:The Prostate: Wiley66:7, s. 675-6860270-41371097-0045
Internetlänk
Hitta via bibliotek
Till lärosätets databas