Predictivity of clinical efficacy of sublingual immunotherapy (SLIT) based on sensitisation pattern to molecular allergens in children with allergic rhinoconjunctivitis.

BACKGROUND: The diagnostic and therapeutic approach to grass pollen allergy is now possible by detecting specific IgE (sIgE) to its allergenic components. AIM: To evaluate the correlation between the sensitisation to different molecular Phleum pratense (Phl p) allergens and clinical efficacy of SLIT. METHODS: The pilot study included 36 patients affected by allergic rhinoconjunctivitis, all treated with SLIT actively. We performed serum analysis of sIgE to Phl p 1, 2, 4, 5, 6, 7, 11 and 12. The Average Rhinoconjunctivitis Total Symptom Score (ARTSS) and the Average Combined Score (ACS) were evaluated before and after one year of immunotherapy. RESULTS: Three different groups of sensitisation were defined based on the range of IgE reactivity to Phleum pratense allergens at baseline: group I (sIgE reactive to 1-3 allergens); group II (sIgE reactive to 4-5 allergens); and group III (sIgE reactive to 6-8 allergens). At T0 ACS was 1.79±0.18 in group I; 1.81±0.23 in group II; and 1.95±0.34 in group III. At T1 ACS was 0.85±0.55 in group I; 1.01±0.31 in group II; and 1.44±0.39 in group III. At T1 there was a significant improvement of ARTSS and ACS for group I (p=0.001). CONCLUSIONS: Sublingual immunotherapy with a grass pollen is efficacious irrespective of the patients' baseline sensitisation to either single or multiple grass pollen molecular allergens. We found that patients with few sensitisations have a greater improvement in combined symptom and medication score. SLIT improves the clinical course of allergic patients although new sensitisations may appear.

The growth of Streptococcus mutans in different milks for infant feeding.

After birth various bacterial species, mainly streptococci, colonize the oral cavity and are frequently isolated from carious lesions in children. Previous studies suggest that an earlier colonization of a child's mouth by cariogenic organisms might be related to a higher risk of caries. The aim of this study is to assess the influence of different milks for infant feeding on the growth of Streptococcus mutans (SM) colonies. Three human milk samples from three different mothers and five infant formulas were tested. To prepare the bacterial inoculum, SM was grown in Brain Heart Infusion broth for 18 hours at 37°C in microaerophilic atmosphere. The growth of SM was determined immediately after the inoculation of milks (T0) and after 24 hours (T24) of incubation. After 24 hours of incubation (ΔT= CFUs/ml at T24 – CFUs/ml at T0) the bacterial growth changes were different among milks. Among the complementary milks tested, ΔT of formulas supplemented with Lactobacillus reuteri and with Bifidobacterium lactis was lower than those of non-supplemented formula. In conclusion, on the basis of the reduced SM growth in milks supplemented with probiotics, we may speculate that these formulas have a preventive effect on the development of caries in children.

Serum resistin levels in children with primary snoring.

Primary Snoring (PS) has been positioned at the milder end of the Sleep-Disordered Breathing severity continuum characterized by snoring and it is usually underestimated. PS is defined as snoring without apnea, frequent arousals, or gas exchange abnormalities and recent studies demonstrated that children with PS have increased blood pressure and reduced arterial distensibility. The association between adipokines and SDB has been recently investigated, though most of the studies were focused on OSAS where intermittent hypoxia characterizing the disease may lead to an inflammatory cascade and to the release of several adipokines, contributing to oxidative stress. Resistin, initially described s an adipokine increasing insulin resistance, has been recently identified as a novel important member of the cytokine family involved in the regulation of inflammation. The aim of our study was to investigate circulating resistin levels in normal weight children with PS. Sixty-five children of normal weight aged between 4 and 14 years of age were selected for habitual snoring. Children with positive polysomnography were excluded from the study. Serum resistin levels were detected in all children with PS. Thirty-three healthy non-snorer children with similar age, sex and BMI were selected as a control group. A significantly higher level of resistin was observed in patients with PS compared to the control group (4.67±1.91 ng/ml vs 3.98±1.58 ng/ml; p<0.01). Patients with inconclusive pulse oximetry showed significantly higher resistin levels than those with negative recordings recordings (5.29±1.91 ng/ml vs 4.20±1.93 ng/ml; p<0.008). Moreover, there was a significant increasing trend between sieric adipokine level and the frequency of snoring (p<0.006). Our results suggest that systemic inflammation and oxidative stress may also play a significant role in the pathophysiology of PS.

Habitual snoring in children with previous allergic sensitization.

Previous studies have reported a high prevalence of allergy in children with Habitual Snoring (HS), but the relationship between allergy in the early years of life and the subsequent development of this Sleep Disordered Breathing (SDB) is yet to be elucidated. The purpose of the present study was to determine the role of early, under 36 months of age, allergic sensitization to food (with or without sensitization to airborne allergens) in determining the development of HS 8-10 years after. One hundred and forty-eight children (10-14 years, mean age 12 years) with a history of food allergy were selected. Under the age of 36 months, atopic status was assessed by skin prick test for a panel of airborne and food allergens. Questionnaires filled in by parents were used to collect information on children's snoring and associated symptoms. HS was defined as snoring three or more times per week. At 1-3 years of age 54 children were positive to food allergens alone, and 94 were positive also to airborne allergens. After 8-10 years of life, when patients were aged between 10 and 14 years, habitual snoring was reported in 37 children. Furthermore, among the 54 children under three years of age sensitized only to food, 8 became HS while of the 94 children sensitized to both food and inhalants allergens 29 developed HS. The difference between those two groups was statistically significant (p=0.04). We reported a significant risk of developing HS in children with early allergic sensitization. Specifically this risk was higher when food allergy was associated with inhalant allergy. The onset of upper airway inflammation due to allergic triggers in subjects under three years of age may be related to the subsequent development of SDB after 8-10 years.

Serum levels of IL-17 in patients with vernal keratoconjunctivitis: a preliminary report.

BACKGROUND AND AIM: Vernal Keratoconjunctivitis (VKC) is a chronic and often severe form of bilateral tarsal and/or bulbar conjunctivitis. The purpose of the present study is to measure the Interleukin-17 (IL-17) serum levels in children with VKC evaluating the role of the systemic inflammation in patients affected by VKC. PATIENTS AND METHODS: Fifteen patients were enrolled with VKC aged between 6 and 10 years of life. Serum were obtained from the peripheral blood samples collected from all the children included in the study to evaluate serum level of IL-17. RESULTS: Serum levels of IL-17 were significantly higher in patients with VKC than in healthy controls (10.3 ± 9.36 pg/ml vs. 3.3 ± 6.20 pg/ml respectively; p < 0.04). CONCLUSIONS: The presence of a significantly higher level of IL-17 in patients with VKC suggests a possible role of this cytokine in the pathogenesis of VKC. Further studies on larger samples of patients are warranted to confirm These findings in order to identify new possible therapeutic targets.

Vernal keratoconjunctivitis: atopy and autoimmunity.

BACKGROUND: Vernal Keratoconjunctivitis (VKC) is a rare chronic ocular inflammatory disease and it mainly affects boys in the first decade of life. Although it is a self-limiting disease, patients may present many phases characterized by an exacerbation of inflammatory symptoms with a consequent decline of the quality of life. PURPOSE: define the clinical and immunological profile of patients affected by VKC and investigate their familiar history of autoimmune disorders and their autoimmunity pattern. PATIENTS AND METHODS: 28 children were enrolled (20 males, 71%) aged between 4 and 14 years of life affected by VKC. Family history of allergic and immunological diseases was collected for each patient. In particular, it was asked whether some components of their families were affected by Hashimoto's thyroiditis, type I diabetes, psoriasis or rheumatoid arthritis and Systemic Lupus Erythematosus (SLE). All VKC children underwent a serological evaluation of anti-nuclear antibodies (ANA). RESULTS: A family history of immunological disorders was found in 46% of patients, 28% of Hashimoto's thyroiditis, 14% of type I diabetes, 14% of psoriasis, and 1 of Systemic Lupus Erythematosus. Furthermore, 35% of patients was ANA positive and they corresponded to patients with a higher ocular score and with the most important clinical symptoms. CONCLUSIONS: the detection of ANA positivity and of a familiar history of autoimmune disorders in a high percentage of children with VKC may help us to better understand the association of this ocular inflammatory disease with systemic autoimmune disorders and atopic condition.

Efficacy of sublingual specific immunotherapy on allergic asthma and rhinitis in children's real life.

BACKGROUND: Sublingual-specific immunotherapy (SLIT) is considered as a valid treatment of respiratory allergies. AIM: We performed a case-control study to evaluate the effect of SLIT in children with allergic asthma and rhinitis. PATIENTS AND METHODS: The study plan included 140 patients (age 6-14 yr, 43% girls and 57% boys) presenting allergic rhinitis and/or asthma, 70 treated with SLIT actively for three years and 70 controls never treated with specific immunotherapy (only symptomatic drugs). Rhinitis Symptom Score (RSS), Asthma Symptom Score (ASS) and Medication Score (MS) were evaluated at beginning and during the 3 years of immunotherapy. results: There was a significant improvement of RSS (mean ± SD) in the SLIT group: baseline 5.31 ± 2.01, third year 1.38 ± 1.06 (p < 0.0001 vs baseline). CONTROL GROUP: baseline 5.00 ± 1.08, third year 4.68 ± 1.152 (P » NS). ASS (mean ± SD) in the SLIT group: baseline 4.09 ± 2.21, third year 1.23 ± 1.4 (p < 0.0001 vs baseline). CONTROL GROUP: baseline 4.04 ± 2.46, third year 3.62 ± 2.26 (p » NS). MS (mean ± SD) in the SLIT group: baseline 3.30 ± 1.4, third year 0.88 ± 1.26 (p < 0.0001 vs baseline). CONTROL GROUP: baseline 3.19 ± 1.23, third year 3.39 ± 1.12 (p » NS). There are no statistically significant differences among monosensitized/polysensitized patients and at different age ranges. None of the patients included reported severe systemic reactions or anaphylaxis. CONCLUSIONS: During the treatment, the active group showed sustained reductions in mean asthma and rhinitis symptom scores when compared with controls to confirm the efficacy and safety of sublingual immunotherapy.

Craniofacial morphology and airflow in children with primary snoring.

OBJECTIVE: Sleep-disordered breathing (SDB) is among the most common diseases and includes a group of pathological conditions that form a severity continuum from primary snoring (PS) to obstructive sleep apnea (OSA). SDB presents a multifactorial etiology and in children, it is often linked to adenotonsillar hypertrophy, which may lead to an alteration of the breathing pattern. Therefore, several studies hinted at the existence of a correlation between SDB and the alteration of craniofacial growth. However, these studies concentrated on the most severe forms of SDB and little evidence still exists for the mildest form of SDB, namely PS. This preliminary study investigates the association between nasal airflow, measured through rhinomanometry, and cephalometric parameters in a sample of young children with PS. PATIENTS AND METHODS: A sample of 30 children with habitual snoring aged between 5 and 8 years was selected by a SDB validated questionnaire at the Pediatric Allergology and Immunology Center of "Sapienza" University of Rome, Italy. To assess the degree of nasal obstruction, all children underwent anterior active rhinomanometry while nocturnal pulse oximetry and polysomnography were used to characterize the SDB. Cephalometric analysis was used to evaluate relevant orthodontic parameters associated to the sagittal and vertical craniofacial development and to the position of the hyoid bone. RESULTS: We found a statistically significant association between the Frankfurt mandibular angle (FMA), which measures the total facial vertical divergence, and the severity of the airflow's obstruction (p = 0.014). CONCLUSIONS: The present study supports the association between the level of nasal obstruction in children with PS and the alteration of cephalometric parameters associated with the vertical craniofacial growth, thus placing the evaluation of craniofacial parameters in the growth period in a privileged position to determine an early diagnosis of a possible insurgence of sleep disorders.

The role of rhinomanometry after nasal decongestant test in the assessment of adenoid hypertrophy in children.

INTRODUCTION: Nasal respiratory obstruction is a very common otolaryngologic problem, often caused by adenoid hypertrophy (AH). Nasal fiberoptic endoscopy (NFE) represents the gold standard method to diagnose AH. Rhinomanometry represents a valid diagnostic support. OBJECTIVE: The aim of our study was to analyze the diagnostic value of rhinomanometry after nasal decongestant (ND) test for the evaluation of adenoid hypertrophy in children. MATERIALS AND METHODS: Seventy-one of 97 collaborative children, aged 6-12 years, affected by upper airways obstructive symptoms and diagnosed as 'chronic oral breathers' by a standardized questionnaire were included in the study. The first evaluation included a complete physical examination, anterior rhinoscopy and anterior active rhinomanometry. Patients with a positive rhinomanometry underwent a second rhinomanometry after the administration of the nasal decongestant (ND) xylometazoline. All children were evaluated using nasal fiberoptic endoscopy (NFE). RESULTS: At rhinomanometry a normal nasal airflow was found in 19 (26.8%) of children while nasal obstruction was underlined in 52 (73.2%). These patients were tested also with rhinomanometry after ND which confirmed the presence of nasal obstruction in 29 (55.7%) of patients. All patients included in the study underwent a NFE: 34 (47.8%) of them presented severe AH with an occlusion >75% of the choanal opening (grade ≥ 3) and 37 (52.2%) presented no or a mild form of AH (grade < 3). When compared to NFE, rhinomanometry test after ND had 82.7% sensitivity and 82.6% specificity. Positive predictive value and negative predictive value were 85.7% and 79.2%, respectively. Two receiver operating characteristic (ROC) curves were derived using data related to rhinomanometry vs NFE, and to rhinomanometry after ND vs NFE. CONCLUSIONS: Rhinomanometry after ND, compared to rhinomanometry, is more specific and useful to evaluate nasal obstruction due to AH in children, and it may be helpful to avoid unnecessary surgical procedures in children with temporary nasal obstruction.