Quality of life improvement with allergen immunotherapy treatment in patients with rhinoconjunctivitis in real life conditions. Results of an observational prospective study (ÍCARA)

Efficacy and safety of subcutaneous immunotherapy with polymerized allergen mixtures in polyallergic patients - ARES observational study

BACKGROUND

Administration of allergen mixtures of many components comprises the most common approach for American allergists regarding the management of polyallergic patients. European allergists, however, are more reluctant to this type of treatment due to the potential drawbacks of mixing extracts.

RESEARCH DESIGN AND METHODS

To assess the efficacy and safety of subcutaneous immunotherapy (SCIT) with polymerized allergen mixtures without dilutional effect in polyallergic patients.This observational, prospective, multicenter study included patients (between 5 and 60 years) with respiratory allergic diseases that had been prescribed with SCIT with mixtures of two pollen or mite extracts. Changes in Symptoms and Medication Score (SMS) and in rhinitis quality of life questionnaire (RQLQ), subjective clinical improvement, treatment satisfaction and tolerability were assessed after the 1-year treatment.

RESULTS

A total of 115 patients were included in the assessment. Mean global SMS decreased from 3.5 (SD = 1.1) to 1.6 (SD = 1.2) points, with a mean absolute reduction of 1.6 (SD = 1.3) points in the RQLQ score (p < 0.001, Wilcoxon test). General subjective clinical improvements and a good treatment satisfaction and tolerability were observed.

CONCLUSION

SCIT with polymerized allergen mixtures from either pollen or mite extracts proved to be an effective and safe treatment option for polyallergic patients suffering from allergic respiratory diseases.

Treatment with pollen allergen immunotherapy improves health-related quality of life in children and adolescents: a three-year follow-up-study

BACKGROUND

The immunological effect of allergen-specific immunotherapy is well documented, but few studies have examined the long-term effects of pollen subcutaneous immunotherapy (SCIT) on health-related quality of life (HRQoL) in children and adolescents. Therefore, the aims of this study were to evaluate the effect of pollen SCIT on HRQoL and to assess the association between HRQoL and symptoms among children and adolescents with allergic rhinoconjunctivitis in a 3-year follow-up.

METHODS

A prospective cohort study was conducted at a paediatric clinic in Sweden, including 158 children (5-16 years) on SCIT (birch and/or grass). Health-related quality of life, measured with DISABKIDS, symptom scores and allergen-specific IgE and IgG4 antibodies (blood test), were assessed at start, and after 1, 2 and 3 years of treatment. ANOVA and t-test were used to analyse differences over time, between groups and linear mixed model for the association between HRQoL and influencing factors.

RESULTS

After 1 year of pollen SCIT, HRQoL improved from 79.5 to 85.1 (p < 0.001), and the improvements were maintained (mean 1 years, 84.8, 3 years 87.2). Symptom scores decreased after 1 year, mean 19.9 to 11.5 (p < 0.001) and were maintained for year two (11.9) and year three (10.3). The proportion of children with severe or very severe symptoms decreased from 35.6% to 4.5% after 1 year of SCIT. Health-related quality of life was associated with symptoms at all measured timepoints (p = 0.001-0.031); higher symptom scores were associated with lower perceived HRQoL. Allergen-specific IgE antibodies decreased, birch from 151.0 to 76.8 kU/L (p < 0.001), and IgG4 antibodies increased, birch from 2.2 to 17.6 g/L (p < 0.001), grass from 0.5 to 14.3 g/L (p < 0.001), during the study period.

CONCLUSION

After 1 year of pollen SCIT, HRQoL improved, and symptoms decreased; these changes were maintained during the study period. The proportion of severe and very severe symptoms significantly decreased.

First-in-human phase 2 trial with mite allergoids coupled to mannan in subcutaneous and sublingual immunotherapy

BACKGROUND

Polymerized allergens conjugated to non-oxidized mannan (PM-allergoids) are novel vaccines targeting dendritic cells (DCs). Previous experimental data indicate that PM-allergoids are readily taken up by DCs and induce Treg cells. This first-in-human study was aimed to evaluate safety and to find the optimal dose of house dust mite PM-allergoid (PM-HDM) administered subcutaneously (SC) or sublingually (SL).

METHODS

In a randomized, double-blind, double-dummy, placebo-controlled trial, 196 subjects received placebo or PM-HDM at 500, 1000, 3000, or 5000 mannan-conjugated therapeutic units (mTU)/mL in 9-arm groups for 4 months. All subjects received 5 SC doses (0.5 ml each) every 30 days plus 0.2 ml SL daily. The primary efficacy outcome was the improvement of titrated nasal provocation tests (NPT) with D. pteronyssinus at baseline and at the end of the study. All adverse events and reactions were recorded and assessed. Secondary outcomes were the combination of symptom and medication scores (CSMS) and serological markers.

RESULTS

No moderate or severe adverse reactions were reported. Subjects improving the NPT after treatment ranged from 45% to 62% in active SC, 44% to 61% in active SL and 16% in placebo groups. Statistical differences between placebo and active groups were all significant above 500 mTU, being the highest with 3000 mTU SL (p = 0.004) and 5000 mTU SC (p = 0.011). CSMS improvement over placebo reached 70% (p < 0.001) in active 3000 mTU SC and 40% (p = 0.015) in 5000 mTU SL groups.

CONCLUSIONS

PM-HDM immunotherapy was safe and successful in achieving primary and secondary clinical outcomes in SC and SL at either 3000 or 5000 mTU/ml.

Post-procedure Rhinitis After Use of Sedatives and Supplemental Nasal Oxygen

Post-procedure rhinitis is a form of nonallergic rhinitis that is a common but underreported complication occurring after procedures requiring sedation and the use of supplemental oxygen via nasal cannula. Symptoms occur immediately after awakening from sedation and may be so unbearable, that it impairs work, daily functioning, sleep patterns, and quality of life. This case describes a 67-year-old male who developed these symptoms after esophagogastroduodenoscopy (EGD) under sedation with supplemental oxygen via nasal cannula. The proposed pathophysiology is thought to be due to the impingement of the cannula against mechanoreceptors in the nasal mucosal membrane causing parasympathetic overactivity. Based on this pathogenesis, the reported patient failed to show improvement with oral antihistamines but instead benefited from a topical anticholinergic agent. Patients at risk should be informed of the possibility of this adverse event and advised on proper treatment if it occurs.

The role of house dust mite immunotherapy in Indonesian children with chronic rhinosinusitis allergy: A randomized control trial

Background

Chronic rhinosinusitis allergy (CRA) is a disease that is commonly found in children and is mostly caused by allergy to house dust mites (HDM). The use of HDM immunotherapy can be considered in children with allergies.

Objectives

Analyzing the impact of mite immunotherapy on disease burden in Indonesian children with CRA.

Methods

A randomized control trial study was conducted to participants in 2 groups, namely the immunotherapy group (n = 25) and the non-immunotherapy group (n = 25). Participants were given HDM immunotherapy for 14 weeks, which was given once per week. Participants during therapy were evaluated for rhinosinusitis symptoms and measured their immunity status (specific IgE), sleep quality (SDSC), quality of life (SN5), and family coping (F-COPES) pre-post therapy. Statistical analysis used in this study included paired t-test, Wilcoxon test, independent t-test, or Mann Whitney test with p < 0.05.

Results

The value of specific IgE in the immunotherapy group was 4.12 ± 7.75 kU/l (pre-test) and 1.52 ± 2.42 kU/l (post-test; p < 0.001), while in the non-immunotherapy group was 1.47 ± 3.28 kU/l (pre-test) and 1.18 ± 2.81 kU/l (post-test; p = 0.317). The SDSC value in the immunotherapy group was 42.16 ± 2.75 (pre-test) and 30.32 ± 3.22 (post-test; p < 0.001), while in the non-immunotherapy group was 41.92 ± 2.75 (pre-test) and 41.84 ± 2.87 (post-test; p = 0.987). The F-COPES value in the immunotherapy group was 101.56 ± 5.78 (pre-test) and 105.20 ± 4.31 (post-test; p = 0.015), while in the non-immunotherapy group was 100.36 ± 9.63 (pre-test) and 99.96 ± 9.98 (post-test; p = 0.224). The SN-5 value in the immunotherapy group was 30.04 ± 2.78 (pre-test) and 11.00 ± 2.33 (post-test; p < 0.001), while in the non-immunotherapy group was 30.04 ± 2.78 (pre-test) and 30.04 ± 2.78 (post-test; p = 0.767). There was a significant comparison between the immunotherapy group and the non-immunotherapy group on the specific IgE (p = 0.013), SDSC (p < 0.001), and SN-5 (p < 0.001) values. Meanwhile, there was no significant difference in the F-COPES value (p = 0.129).

Conclusions

The administration of HDM immunotherapy can improve the participant's immunity, quality of life, and sleep disorder.

Safety evaluation of a multiallergen immunotherapy treatment in polyallergic patients. APOLO observational study

Aim: Assessment of safety, tolerability and changes in global clinical impression with an multiallergen immunotherapy treatment without dilutional effect in polyallergic patients. Patients & methods: This observational prospective study included patients with allergic rhinitis-rhinoconjunctivitis with or without asthma between 5 and 60 years old receiving immunotherapy treatment with a mixture of two allergenic sources. All adverse events were recorded. Global clinical impression, tolerability subjective assessment and satisfaction were also assessed. Results: 130 patients were analyzed. Nine clinically relevant local adverse reactions were reported in six patients (4.6%). Six systemic reactions (grades 0-I) occurred in four patients (3.1%). Patients improved significantly in their global clinical impression. Good tolerability subjective assessment and satisfaction values were also observed. Conclusion: This multiallergen immunotherapy treatment without dilutional effect can be considered as a potential therapeutic alternative for polyallergic patients suffering from allergic rhinitis.

Illustrative Case Series and Narrative Review of Therapeutic Failure of Immunotherapy for Allergic Rhinitis

This is a series of 4 cases (3 therapeutic failure and 1 early relapse) in adult patients treated with allergen immunotherapy (AIT) for allergic rhinitis (AR) in our immunotherapy clinic, which treats 110 new patients per year. AIT includes both subcutaneous and sublingual routes. The current national/international AIT recommendations and the literature have been searched to identify guidance for the optimal management of therapeutic failure of AIT in AR. There is scant information available to support clinicians when treatment failure and/or intolerable side effects occur. The importance is highlighted for developing the guidance and evidence base for the benefit of this patient subgroup. The potential strategies that clinicians have proposed are discussed in this article, though it is acknowledged that these are mostly not evidence-based.