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Are paramyxoviruses involved in Paget's disease? A negative view
1Department of Medicine and Therapeutics, University of Aberdeen Medical School, UK.
Abstract:
We believe that the assembled data are consistent with the presence of mRNA species and/or proteins in pagetic bone that are recognized by some paramyxovirus antibodies and nucleic acid probes. The evidence presented so far is insufficient to substantiate claims for the "unequivocal" presence of paramyxovirus sequences in pagetic bone, because the molecular targets for these probes could be endogenous mRNA's and proteins rather than viruses. Positive reports of a viral presence in Paget's disease have so far been confined to two laboratories, both of which have consistently demonstrated evidence for the virus they have worked on most. We argue that independent replication of the aforementioned findings is necessary to conclude that pagetic bone can be considered a site of chronic paramyxovirus infection. For this to be convincing, we would expect to see colocalization of viral antigens, mRNA, and genomic RNA in cells that also show ultrastructural evidence of viral infection. If virus is indeed present, it should, in addition, be possible to clone and characterize extensive tracts of viral cDNA from samples of pagetic tissue. Although we acknowledge that the absence of evidence for viral mRNA in some RT-PCR studies does not constitute evidence of absence, the data implicating paramyxoviruses as causal agents is conflicting and insufficient to prove a cause-effect relationship. In view of this, we believe that the role of paramyxovirus infection as a cause Paget's disease remains uncertain.
Insights
Evidence suggests paramyxovirus may be present in Paget's disease bone, but current data is insufficient to confirm a causal link. Further independent replication is needed to establish a definitive connection between paramyxovirus and Paget's disease.
Area of Science:
- Virology
- Bone Biology
- Genetics
Background:
- Paget's disease of bone is a chronic disorder of unknown etiology.
- Paramyxoviruses have been investigated as potential causative agents.
- Previous studies reported viral presence in affected bone tissue.
Purpose of the Study:
- To evaluate the evidence for paramyxovirus presence in Paget's disease.
- To assess the sufficiency of current data to establish a causal relationship.
- To outline criteria for confirming chronic paramyxovirus infection in Paget's disease.
Main Methods:
- Analysis of existing data on mRNA and protein detection in pagetic bone.
- Review of findings from laboratories reporting viral presence.
- Consideration of criteria for viral confirmation (colocalization, cDNA characterization).
Main Results:
- Data is consistent with the presence of paramyxovirus-recognized molecules in pagetic bone.
- Current evidence is insufficient to unequivocally confirm paramyxovirus sequences.
- Positive reports are largely confined to specific laboratories, lacking independent replication.
Conclusions:
- The role of paramyxovirus infection in causing Paget's disease remains uncertain.
- Independent replication and robust evidence are necessary for confirmation.
- Conflicting data highlights the need for further rigorous investigation.