User profiles for Klaas Poelstra

Klaas Poelstra

Professor of Drug Targeting, University of Groningen
Verified email at rug.nl
Cited by 8381

Dephosphorylation of endotoxin by alkaline phosphatase in vivo.

K Poelstra, WW Bakker, PA Klok… - The American journal …, 1997 - ncbi.nlm.nih.gov
Natural substrates for alkaline phosphatase (AP) are at present not identified despite
extensive investigations. Difficulties in imagining a possible physiological function involve its …

Removal of phosphate from lipid A as a strategy to detoxify lipopolysaccharide

…, AM van Loenen-Weemaes, DKF Meijer, K Poelstra - Shock, 2002 - journals.lww.com
Lipopolysaccharide (LPS) may cause sepsis when it enters the blood circulation. The toxic
moiety of LPS is the well-preserved lipid A part. Lipid A contains two phosphate groups …

A physiologic function for alkaline phosphatase: endotoxin detoxification.

K Poelstra, WW Bakker, PA Klok… - … ; a journal of technical …, 1997 - europepmc.org
Alkaline phosphatase (AP), a common enzyme present in many species including humans,
has been studied extensively. Although the enzyme is routinely applied as a marker for liver …

Drug targeting to the diseased liver

K Poelstra, J Prakash, L Beljaars - Journal of controlled release, 2012 - Elsevier
Many serious liver diseases affecting millions of people world-wide cannot be treated despite
many efforts which warrants a search for new therapeutic strategies. Potent drugs may not …

Role of alkaline phosphatase in colitis in man and rats

A Tuin, K Poelstra, A de Jager-Krikken, L Bok… - Gut, 2009 - gut.bmj.com
Background and aims: Crohn’s disease (CD) and ulcerative colitis (UC) are chronic
multifactorial inflammatory bowel diseases (IBDs) with unknown aetiology, but a deregulated …

Albumin Modified With Mannose 6–Phosphate: A Potential Carrier for Selective Delivery of Antifibrotic Drugs to Rat and Human Hepatic Stellate Cells

…, P Olinga, GM Groothuis, DK Meijer, K Poelstra - Hepatology, 1999 - journals.lww.com
The hallmark of liver fibrosis is an increased extracellular matrix deposition, caused by an
activation of hepatic stellate cells (HSC). Therefore, this cell type is an important target for …

[PDF][PDF] Tauroursodeoxycholic acid protects rat hepatocytes from bile acid‐induced apoptosis via activation of survival pathways

…, TE Vrenken, R Havinga, K Poelstra… - …, 2004 - Wiley Online Library
Ursodeoxycholic acid (UDCA) is used in the treatment of cholestatic liver diseases, but its
mechanism of action is not yet well defined. The aim of this study was to explore the protective …

The effect of parenterally administered cyclodextrins on cholesterol levels in the rat

HW Frijlink, AC Eissens, NR Hefting, K Poelstra… - Pharmaceutical …, 1991 - Springer
The inclusion complex formation of intravenously administered hydroxypropyl-β-cyclodextrin
and β-cyclodextrin with endogenous lipids was studied. We tested the hypothesis that …

Cytokine regulation of pro-and anti-apoptotic genes in rat hepatocytes: NF-κB-regulated inhibitor of apoptosis protein 2 (cIAP2) prevents apoptosis

…, M Homan, C Trautwein, P Liston, K Poelstra… - Journal of …, 2002 - Elsevier
Background/Aims: In acute liver failure, hepatocytes are exposed to various cytokines that
activate both cell survival and apoptotic pathways. NF-κB is a central transcription factor in …

[HTML][HTML] Successful targeting to rat hepatic stellate cells using albumin modified with cyclic peptides that recognize the collagen type VI receptor

…, PJ De Bleser, B Weert, DKF Meijer, K Poelstra - Journal of Biological …, 2000 - ASBMB
The key pathogenic event in liver fibrosis is the activation of hepatic stellate cells (HSC).
Consequently, new antifibrotic therapies are directed toward an inhibition of HSC activities. The …