Canine distemper virus induces human osteoclastogenesis through NF-kappaB and sequestosome 1/P62 activation.

Unlabelled: Previous studies have implicated CDV in the pathogenesis of Paget's disease; however, there has been no direct evidence that CDV can infect human cells. We studied the effects of CDV on osteoclastogenesis in vitro and showed that CDV had a dose-dependent effect on osteoclastogenesis, through a possible mechanism involving activation of NF-kappaB and sequestosome 1/p62.

Introduction: Paget's disease is characterized by a dramatic increase in size and number of osteoclasts.

Apoptotic gene expression in Paget's disease: a possible role for Bcl-2.

Paget's disease of bone is characterized by an increase in both the size and the number of bone-resorbing osteoclasts. An important regulator of osteoclast activity is the process of apoptosis, and any aberration in this process could lead to increased osteoclasis. Analysis using human apoptosis cDNA expression arrays revealed that the apoptotic suppressor, Bcl-2, showed a marked increase in expression in Pagetic bone.

A comparison of in situ hybridisation, reverse transcriptase-polymerase chain reaction (RT-PCR) and in situ-RT-PCR for the detection of canine distemper virus RNA in Paget's disease.

Previous evidence implicating Paramyxoviruses in the aetiopathology of Paget's disease of bone has proved controversial. Whilst several groups have demonstrated Paramyxoviruses using techniques such as in situ hybridisation (ISH), reverse transcriptase-polymerase chain reaction (RT-PCR), and in situ-RT-PCR (IS-RT-PCR), others have found no evidence of viruses using only RT-PCR. To investigate this latter finding, we have now compared detection of canine distemper virus by ISH, RT-PCR (three different methods) and IS-RT-PCR, in 10 patients with Paget's disease, and samples of non-diseased bone from four patients.

Vitamin D metabolism, rickets, and osteomalacia.

Rickets in the growing child or adolescent and osteomalacia in the adult develop in a variety of clinical situations and have in common an absence or delay in the mineralization of growth cartilage and in newly formed bone collagen. Classically, deficiency of vitamin D, which is essential for the absorption of dietary calcium, has been the major cause. However, rickets is also seen as a result of hereditary defects in critical vitamin D signaling molecules.

Functional, molecular, and biochemical characterization of streptozotocin-induced diabetes.

Altered divalent cation homeostasis with bone mineral loss, hypercalciuria, and hypomagnesemia have been associated consistently with human diabetes mellitus. This study investigated functional, molecular, and biochemical determinants that accompany this condition in chronically (2 wk) streptozotocin (STZ)-diabetic rats. Catheterized, conscious, diabetic rats on servo-controlled fluid replacement exhibited an increased GFR (+70%) and a substantially raised urinary calcium output (+568%) when compared with control rats.