7 research outputs found
Analytical Evaluation of a Vancomycin Immunoassay in Synovial Fluid
In clinical laboratories performing routine activities, the need to answer the burning clinical question in emerging field may be limited by lack of technology support or assays accessibility. Commercially available methods, although originally validated for specific biological matrices, may be employed for other matrices, following appropriate guidelines such as Clinical and Laboratory Standards Institute (CLSI) EP 19. We investigated the use of a vancomycin assay with synovial fluid samples, in view of a possible employment in vancomycin release study. The standard of care of periprosthetic joint infection is a two- stage revision surgery with antibiotic-loaded bone cement implantation. Vancomycin, for its activity against gram-positive bacteria even multidrug-resistant staphylococci, is the most widely used antibiotic. Despite the widespread use of such devices, little is known about the in vivo elution in the joint space. Clinical laboratories equipped with a validated, affordable method to quantify vancomycin in synovial fluid, may support clinical research, and give an important contribution to the study of the pharmacokinetics of antibiotic release from bone cement matrix
<sup>125</sup>I-Radiolabeled Morpholine-Containing Arginine–Glycine–Aspartate (RGD) Ligand of α<sub>v</sub>β<sub>3</sub> Integrin As a Molecular Imaging Probe for Angiogenesis
In this paper, using a hybrid small-animal Micro SPECT/CT
imaging
system, we report that a new <sup>125</sup>I-Cilengitide-like RGD-cyclopentapeptide,
containing d-morpholine-3-carboxylic acid, interacts in vivo
with α<sub>v</sub>β<sub>3</sub> integrin expressed by
melanoma cells. Images clearly show that the <sup>125</sup>I-compound
has the capacity to monitor the growth of a melanoma xenograft. Indeed,
retention of the labeled ligand in the tumor mass has a good tumor/background
ratio, and a significant reduction of its uptake was observed after
injection of unlabeled ligand. These results suggest that the use
of <sup>125</sup>I-labeled morpholine-based RGD-cyclopentapeptides
targeting α<sub>v</sub>β<sub>3</sub> positive tumors may
play a role in future therapeutic strategies