ABSTRACT
A case is presented of a 69 year old male patient with a history of wrist fracture from over 50 years ago with pain refractory to analgesics and with joint destruction of the wrist in conventional radiology. We have conducted a review of extrapulmonary tuberculous osteoarthritis discussing the diagnosis and treatment of this unusual presentation of the disease.
Subject(s)
Osteoarthritis/diagnosis , Tuberculosis, Osteoarticular/diagnosis , Wrist Joint/microbiology , Aged , Humans , Male , Osteoarthritis/microbiology , Radiography , Wrist Joint/diagnostic imaging , Wrist Joint/pathologyABSTRACT
In an attempt to determine the mechanism of the profound defect in chemotaxis observed in the neutrophils of human neonates, we have examined the generation of polymerized or filamentous actin (F actin) following stimulation of the cells with chemotactic factors. We have also examined the changes in the intracellular levels of free calcium in neonatal neutrophils and compared the results with those in adult neutrophils. Following exposure to formyl-methionyl-leucyl-phenylalanine (FMLP) or zymosan-activated serum (ZyAS), neutrophils from adult donors showed an increase in intracellular free calcium, as determined by Quin 2/AM fluorescence, and in actin polymerization (45-55%), as measured by nitrobenzoxadiazole phallicidin fluorescence. These responses were abolished by preincubation with the calcium antagonist verapamil (0.1 mM), which inhibits both calcium influx and release from intracellular stores. In marked contrast to the results obtained with neutrophils from adults, neutrophils from newborn infants, which have defective chemotactic responses, failed to generate F actin following FMLP or ZyAS stimulation and developed significantly lower levels of free intracellular calcium.