Five recommendations are proposed for the orofacial examination of patients with JIA to improve the clinical practice and aid standardized data collection for future studies. The task force has formulated a future research program based on the proposed recommendations.

Transduction of primer binding site-impaired Akv murine leukemia virus-based retroviral vectors from the murine packaging cell lines ⌿-2 and ⍀E was studied. The efficiency of transduction of the neo marker of all mutated constructs was found to decrease by 5 to 6 orders of magnitude compared with that of the wild-type vector. Thirty-two of 60 transduced proviruses analyzed harbored a primer binding site sequence matching a glutamine tRNA primer. Sequence analysis of the regions flanking the glutamine tRNA primer binding site revealed a distinct pattern of nucleotide differences from the Akv-based vector, suggesting the involvement of a specific endogenous virus-like sequence in patch repair rescue of the primer binding site mutants. The putative recombination partner RNA was found in virions from ⌿-2 cells as detected by analysis of glutamine tRNA-initiated cDNA and by sequence analysis of regions at or around the glutamine tRNA primer binding site. We propose that the forced recombination of primer binding site mutants involves initial priming on endogenous viral sequences and requires template switching during minus-strand synthesis in the region between the neo gene and the mutated primer binding site to allow correct second-strand transfer in reverse transcription. The system thereby selects for a reverse transcriptase-mediated recombination event in the 5 untranslated region. A panel of sequence differences between the recombination partners in this region has allowed mapping of the site of recombination for each transduction event. Interestingly, the majority of the recombination events were clustered within a narrow, 33-nucleotide region thought to be involved in genomic RNA dimerization.

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Objective.To propose multidisciplinary, consensus-based, standardization of operational terminology and method of assessment for temporomandibular joint (TMJ) involvement in juvenile idiopathic arthritis (JIA).Methods.Using a sequential expert group–defined terminology and methods-of-assessment approach by (1) establishment of task force, (2) item generation, (3) working group consensus, (4) external expert content validity testing, and (5) multidisciplinary group of experts final Delphi survey consensus.Results.Seven standardized operational terms were defined: TMJ arthritis, TMJ involvement, TMJ arthritis management, dentofacial deformity, TMJ deformity, TMJ symptoms, and TMJ dysfunction.Conclusion.Definition of 7 operational standardized terms provides an optimal platform for communication across healthcare providers involved in JIA-TMJ arthritis management.