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HPV genotyping and HLA II analysis in a pedigree study of pediatric RRP: preliminary results
1Department of Public Medicine Sciences, UCO Hygiene and Preventive Medicine, University of Trieste and IRCCS Burlo Garofolo, Via dell'Istria 65/1, 34100 Trieste, Italy. comar@burlo.trieste.it
Insights
This study explored human papillomavirus (HPV) infection and HLA class II alleles in pediatric recurrent respiratory papillomatosis (RRP). Certain HLA alleles may indicate a predisposition to RRP and influence HPV infection severity.
Area of Science:
- Genetics
- Virology
- Pediatrics
Background:
- Recurrent respiratory papillomatosis (RRP) in children is often linked to human papillomavirus (HPV) infection.
- The role of host genetics, specifically HLA class II alleles, in RRP development and severity is not fully understood.
Purpose of the Study:
- To evaluate HPV infection and HLA class II alleles as potential predictive markers in pediatric RRP.
- To investigate familial patterns of HPV infection and HLA associations in RRP cases.
Main Methods:
- Pedigree study analyzing HPV genotyping and HLA class II polymorphisms in families with pediatric RRP.
- Samples included affected children and their mothers, with HPV detection in laryngeal biopsies and cervical smears.
Main Results:
- HPV types 11 and 6 were identified in affected children and their mothers.
- The HLA-DQB1*0501 allele showed a protective effect in one family.
- The HLA-DQB1*0301 allele, associated with HPV infection, was found in homozygous and heterozygous forms in affected individuals and their mothers.
Conclusions:
- This is the first pedigree study to assess HLA class II alleles and HPV infection in pediatric RRP.
- The findings suggest that specific HLA class II alleles may influence RRP predisposition and HPV infection severity.
- Pedigree analysis can help identify genetic markers for RRP.
Objective:
This preliminary pedigree study aims at the evaluation of HPV infection and HLA class II alleles as predictive markers in pediatric RRP.
Methods:
We investigated for HPV genotyping and HLA class II polymorphisms all the components of family nucleus where we detected a child born to an HPV infected mother and suffering from RRP.
Results:
HPV 11 was detected both in the laryngeal biopsies of two of the three affected babies and in the cervical smear of their mothers. The third child was positive for HPV 6 while his mother harboured a double HPV 6-16 infection. In one family, the HLA-DQB1*0501 allele exerted its protective role. The HLA-DQB1*0301 allele, commonly associated to a high grade of cervical neoplasia and HPV infection, was present in homozygous in one mother and her child. The same allele was found, though in a heterozygous form, in the third patient too.
Conclusion:
Our report is the first attempt to use the pedigree study for the evaluation of HLA class II alleles and HPV infection related to pediatric RRP. This approach could identify genetic markers that may influence disease predisposition and the severity of HPV infection.
