Rabbit Anti-Human PPL Polyclonal Antibody

Purpose The primary objective of this study was to determine the degree of patient satisfaction at a minimum of 5 years of follow-up after endoscopic calcaneoplasty. The secondary objectives were to assess functional outcome measures, pain scores, analysis of bone removal, reformation of exostosis at follow-up and correlation of the size of the exostosis and recurrent or persisting complaints. Methods This study evaluated patients who underwent endoscopic calcaneoplasty, between January 1st 2000 and December 31st 2010, for the diagnosis of retrocalcaneal bursitis. The evaluation consisted of PROMs (patient-reported outcome measures), a questionnaire and a visit to the outpatient clinic for physical examination and a standard lateral weight-bearing radiograph of the ankle. Patient satisfaction, functional outcomes and pain scores were measured by use of a numeric rating scale (NRS). Size of the posterosuperior calcaneal exostosis was measured on a standard lateral weight-bearing radiograph using parallel pitch lines (PPL) and the Fowler-Philip angle (PFA). Results The response rate was 28 out of 55 (51%) and the median time to follow-up was 101(IQR 88.5-131.8) months. The median satisfaction score for treatment results was 8.5 out of 10 (IQR 6-10). FAOS symptoms 84.5 (IQR 58.0-96.4), FAOS pain 90.3 (IQR 45.1-100.0), FAOS ADL 94.9 (IQR 58.1-100.0), FAOS sport 90.0 (IQR 36.3-100.0) and FAOS QOL 71.9 (IQR 37.5-93.8) and median AOFAS was 100 (IQR 89-100). The median PLL difference between before operation and 2 weeks after the operation was - 4 mm (IQR-6 and -1) and the median PLL difference between 2 weeks after the operation and at follow-up was 1 mm (0-2). The median PFA was 65 (63-69) at baseline, 66.5 (60.8-70.3) 2 weeks after the operation and 64 (60.8-65.3) at follow-up. Conclusion Despite the limited response rate, this study shows high patient satisfaction and good long-term functional outcome in patients affected by retrocalcaneal bursitis who underwent endoscopic calcaneoplasty.

We developed magnetic chitosan nanoparticles (CS-Fe3O4) with mean diameter of 15-20 nm. Subsequently, these inorganic-organic composite nanoparticles were modified using an imidazole-based functional ionic liquid (IL). The prepared support (IL-CS-Fe3O4), which was used to immobilize porcine pancreatic lipase (PPL), was characterized using Fourier transform infrared (FTIR) spectroscopy, vibrating sample magnetometry (VSM), thermogravimetry (TG), transmission electron microscopy (TEM) and X-ray diffraction (XRD). Circular dichroism (CD) was used to analyze the secondary structure of immobilized PPL. The immobilized PPL (PPL-IL-CS-Fe3O4) exhibited 1.93-fold higher specific activity than PPL-CS-Fe3O4 when triacetin was used as the substrate, and showed 95 mg/g of lipase immobilization capacity and 382% of activity recovery. The residual activity of PPL-IL-CS-Fe3O4 was above 60% of the initial activity after incubation at 50 degrees C for 6 h, as was higher than that of PPL-CS-Fe3O4 which showed 40% of the initial activity. In addition, PPL-IL-CS-Fe3O4 retained 84.6% of the initial activity after 10 cycles, whereas PPL-CS-Fe3O4 retained only 75.5% activity. Furthermore, the kinetic parameters, apparent K-m and V-max of PPL-IL-CS-Fe3O4 were 2.51 mg/mL and 1.395 U/mg respectively, these results indicated that the immobilized PPL had better affinity towards the substrate, especially when the nanoparticles were modified by functional IL. Besides, the magnetic chitosan nanoparticles loaded with PPL were easily recovered. A novel, efficient, and practical method for enzyme immobilization was developed.