Inner surface modification of polyurethane ureteral stents using plasma-enhanced chemical vapor deposition to improve the resistance to encrustation in a pig model.

Purpose: We developed a ureteral stent with a non-fouling inner surface using plasma micro-surface modification technology. This study aimed to evaluate the safety and efficacy of this stent in animal model.

Materials And Methods: Ureteral stents were placed in five Yorkshire pigs.

Inner surface modification of ureteral stent polyurethane tubes based by plasma-enhanced chemical vapor deposition to reduce encrustation and biofilm formation.

Encrustation and/or biofilm formation in ureteral stents are major causes of obstruction and reduce the lifetime of a ureteral stent. In this study, the inner surfaces of polyurethane (PU) tubes (inner and outer diameters of 1.2 and 2.

Enhanced culturing of adipose derived mesenchymal stem cells on surface modified polystyrene Petri dishes fabricated by plasma enhanced chemical vapor deposition system.

Mesenchymal stem cells (MSCs) have received considerable attention as therapeutic cells for regenerative medicine and tissue engineering, because of their ability to replace damaged cells or regenerate surrounding cells. There are many technical difficulties in the mass production of high-quality stem cells because the stem cells must maintain an efficient proliferative cell state during in vitro culture. The results of this study show that plasma surface-modification enhanced significantly the culture of adipose-derived mesenchymal stem cells (ASCs) on the polystyrene (PS) Petri dishes.

Surface modification of polystyrene Petri dishes by plasma polymerized 4,7,10-trioxa-1,13-tridecanediamine for enhanced culturing and migration of bovine aortic endothelial cells.

Plasma surface modification is an effective method for changing material properties to control cell behavior on a surface. This study investigates the efficiency of a plasma polymerized 4,7,10-trioxa-1,13-tridecanediamine (ppTTDDA) film coated on a polystyrene (PS) Petri dish, which is a biocompatible surface with carbon- and oxygen-based chemical species. The adhesion, proliferation, and migration properties of bovine aortic endothelial cells (BAECs) were profoundly enhanced in the ppTTDDA-coated PS Petri dishes without extracellular matrix (ECM) proteins, when compared with the uncoated PS Petri dishes.

[Serum ALT and HBV DNA levels in patients with HBeAg-negative chronic hepatitis B].

Background/aims: HBeAg-negative chronic hepatitis B (CHB) has a poor long-term prognosis. Since no precise clinically relevant HBV thresholds are known in HBeAg-negative CHB, the decision to treat is difficult. The aim of this study was to evaluate the levels of serum HBV DNA and transaminase and to investigate the correlation of these values in patients with HBeAg-negative CHB.