@article {10752, title = {Adolescent with painful vesicular otitis and vertigo.}, journal = {Arch Dis Child Educ Pract Ed}, volume = {104}, year = {2019}, month = {2019 Apr}, pages = {103-105}, issn = {1743-0593}, doi = {10.1136/archdischild-2017-313883}, author = {Conversano, Ester and Cozzi, Giorgio and Poropat, Federico and Di Mascio, Alberto and Salis, Simona and Grasso, Domenico Leonardo and Barbi, Egidio} } @article {10796, title = {Human beta defensin-1 is involved in the susceptibility to adeno-tonsillar hypertrophy.}, journal = {Int J Pediatr Otorhinolaryngol}, volume = {107}, year = {2018}, month = {2018 Apr}, pages = {135-139}, abstract = {

INTRODUCTION: Innate immunity molecules are known to play a pivotal role in the homeostasis of the oral mucosa, permitting the presence of commensal microflora and, at the same time, providing a first line of defense against pathogens attempting to invade the oral cavity. Tonsils represent the local immune tissue in oral cavity, being able to provide a non-specific response to pathogens; however, in the presence of microbes or foreign materials present in the mouth tonsils could became infected and develop chronic inflammation, thus leading to hypertrophy. The etiology of the disease is multifactorial depending upon environmental and host factors, the latter including molecules of mucosal innate immunity.

METHODS: Ninety-five children with adeno-tonsillar hypertrophy subjected to adeno-tonsillectomy were recruited at the pediatric otorhinolaryngology service of the Institute for Maternal and Child Health IRCCS Burlo Garofolo, Trieste (Italy). The specimen discarded from the surgery were used for genomic DNA extraction and genotyping, for mRNA extraction and gene expression analysis, finally the samples were cut and used to prepare slides to perform immunohistochemistry.

RESULTS: Functional polymorphisms within DEFB1 gene, encoding the human beta defensin-1 (hBD-1), were analyzed finding association between DEFB1 rare haplotypes and susceptibility to adeno-tonsillar hypertrophy. DEFB1 mRNA expression was detected in the tonsils and the hBD-1 protein was localized at the epithelia of tonsils mainly in the proximity of the basal lamina.

CONCLUSION: Our findings lead us to hypothesize an involvement of hBD-1 mediated innate immunity in the modulation of the susceptibility towards adeno-tonsillar hypertrophy development.

}, keywords = {Adenoidectomy, Adenoids, Adolescent, beta-Defensins, Child, Child, Preschool, Female, Genetic Predisposition to Disease, Genotype, Haplotypes, Humans, Hypertrophy, Immunity, Innate, Immunohistochemistry, Italy, Male, Palatine Tonsil, Tonsillectomy}, issn = {1872-8464}, doi = {10.1016/j.ijporl.2018.01.041}, author = {Zupin, Luisa and Celsi, Fulvio and Bresciani, Martina and Orzan, Eva and Grasso, Domenico Leonardo and Crovella, Sergio} } @article {8486, title = {DEFB1 polymorphisms and susceptibility to recurrent tonsillitis in Italian children.}, journal = {Int J Pediatr Otorhinolaryngol}, volume = {83}, year = {2016}, month = {2016 Apr}, pages = {12-5}, abstract = {

INTRODUCTION: The tonsils are secondary lymphoid organs fundamental for immune system response against pathogens within the oral cavity. Tonsillitis refers to inflammation of the pharyngeal tonsils that may include the adenoids and the lingual tonsils and that can be acute, recurrent, and chronic. Viral or bacterial infections, as well as immunologic factors are the main trigger to tonsillitis and disease{\textquoteright}s chronicity: the host immune responses, especially the innate one, could play an important role in susceptibility to the disease.

OBJECTIVES: The current study aims at investigating the role of functional polymorphisms in the 5{\textquoteright}UTR (c.-52G>A, c.-44G>C and c.-20G>A) of DEFB1 gene, encoding for the antimicrobial peptide human beta-defensin 1, in the predisposition to recurrent tonsillitis in children from North Eastern Italy.

RESULTS: No significant correlation was found between DEFB1 allele, genotype and haplotype frequencies and recurrent tonsillitis susceptibility with the exception of an increased risk to disease development in patients carrying DEFB1 rare haplotypes.

CONCLUSION: Our results may suggest that DEFB1 polymorphisms alone may not influence pathology susceptibility, however they could possibly concur, together with other factors involved in the genetic control of innate immune system, in the predisposition towards recurrent tonsillitis.

}, issn = {1872-8464}, doi = {10.1016/j.ijporl.2016.01.025}, author = {Zupin, Luisa and Polesello, Vania and Grasso, Domenico Leonardo and Crovella, Sergio and Segat, Ludovica} } @article {8514, title = {Lactoferrin gene polymorphisms in Italian patients with recurrent tonsillitis.}, journal = {Int J Pediatr Otorhinolaryngol}, volume = {88}, year = {2016}, month = {2016 Sep}, pages = {153-6}, abstract = {

INTRODUCTION: Recurrent tonsillitis is an oral pathology characterized by inflammation of tonsils. The disease susceptibility depends upon environmental and host factors, specifically the innate immune response, the first line of host defence could play an important role. Among innate immunity members, lactoferrin, known for its antimicrobial properties, was previously correlated with the risk of oral pathology as periodontitis and dental caries.

METHODS: 89 Italian children presenting recurrent tonsillitis and 95 healthy children were genotyped for two LTF non-synonymous polymorphisms, called Thr29Ala and Arg47Lys, in order to investigate their potential role in recurrent tonsillitis susceptibility.

RESULTS: no different allele, genotype and haplotype frequency distributions were detected comparing patients and controls.

CONCLUSION: data from the current study indicate that LTF polymorphisms might not be involved in recurrent tonsillitis development in our Italian population. However, since the importance of lactoferrin in oral immunity has been previously assessed, further studies should be necessary to unravel the potential role of LTF genetic variants in oral cavity.

}, issn = {1872-8464}, doi = {10.1016/j.ijporl.2016.07.002}, author = {Zupin, Luisa and Angelelli, Francesco and Grasso, Domenico Leonardo and Crovella, Sergio} }