暂无摘要。

UNASSIGNED: Polymerized allergoids conjugated with mannan represent a novel approach of allergen immunotherapy targeting dendritic cells. In this study, we aimed to determine the optimal dose of mannan-allergoid conjugates derived from grass pollen (Phleum pratense and Dactylis glomerata) administered via either the subcutaneous or sublingual route.
UNASSIGNED: A randomized, double-blind, placebo-controlled trial with a double-dummy design was conducted, involving 162 participants across 12 centers in Spain. Subjects were randomly allocated to one of nine different treatment groups, each receiving either placebo or active treatment at doses of 500, 1,000, 3,000, or 5,000 mTU/mL over four months. Each participant received five subcutaneous (SC) doses of 0.5 mL each, every 30 days, and a daily sublingual (SL) dose of 0.2 mL. Participants who received active treatment through SC, received placebo through SL. Participants who received active treatment through SL, received placebo SC. One Group, as control, received bot SC and SL placebo. The primary efficacy outcome was the improvement in titrated nasal provocation tests (NPT) at the end of the study compared to baseline. Secondary outcomes included specific antibody (IgG4, IgE) and cellular (IL-10 producing and regulatory T cell) responses. All adverse events and side reactions were recorded and assessed.
UNASSIGNED: Post-treatment, the active groups showed improvements in NPT ranging from 33% to 53%, with the highest doses showing the greatest improvements regardless of the administration route. In comparison, the placebo group showed a 12% improvement. Significant differences over placebo were observed at doses of 3,000 mTU/mL (p=0.049 for SL, p=0.015 for SC) and 5,000 mTU/mL (p=0.011 for SL, p=0.015 for SC). A dose-dependent increase in IgG4 was observed following SC administration, and an increase in IL-10 producing cells for both routes of administration. No serious systemic or local adverse reactions were recorded, and no adrenaline was required.
UNASSIGNED: Grass pollen immunotherapy with mannan-allergoid conjugates was found to be safe and efficacious in achieving the primary outcome, whether administered via the subcutaneous or sublingual routes, at doses of 3,000 and 5,000 mTU/mL.
UNASSIGNED: https://www.clinicaltrialsregister.eu/ctr-search (EudraCT), identifier 2014-005471-88; https://www.clinicaltrials.gov, identifier NCT02654223.

Background: Being stung by Hymenoptera species can cause life-threatening anaphylaxis. Although venom immunotherapy (VIT) seems to be the most effective treatment, its long-term efficacy, and risk factors for adverse events remain unclear. Objective: The objective was to investigate the long-term efficacy of VIT and evaluate adverse events and risk factors related to this. Method: Patients who received VIT in a tertiary-care adult allergy clinic between January 2005 and July 2022 were included. Patients\' data were compared with those of individuals who had been diagnosed with bee and/or wasp venom allergy during the same period but had not received VIT and experienced field re-stings. Results: The study included 105 patients with venom allergy, of whom 68 received VIT and 37 did not receive VIT. Twenty-three patients (34%) completed 5 years of VIT, and the overall mean ± standard deviation VIT duration was 46.9 ± 20.9 months. Re-stings occurred in 5 of 23 patients who completed 5 years of VIT, and none of them developed a systemic reaction. Eighteen patients (40%) experienced re-stings after prematurely discontinuing VIT, of whom eight (44%) developed a systemic reaction. In the control group of patients who did not receive VIT, 26 patients (70.3%) experienced re-stings, and all had systemic reactions (100%), with no change in their median Mueller scores. There was a significant difference in the median Mueller score change between the patients who received VIT and the controls who did not (p = 0.016). A total of 13 patients (19%) experienced adverse events while receiving VIT, which were systemic reactions in nine honeybee VIT. The use of β-blockers was determined as the most important risk factor (odds ratio 15.9 [95% confidence interval, 1.2-208.8]; p = 0.035). Conclusion: It was confirmed that VIT was effective in both reducing the incidence and the severity of re-sting reactions. These effects were more pronounced in the patients who completed 5 years of VIT.

Background: Hymenoptera venom allergy (HVA) is among the most common causes of severe allergic reactions worldwide. Objective: To investigate clinical features and factors that affect the severity of HVA and to determine the alterations in immunologic biomarkers after venom immunotherapy (VIT). Methods: Seventy-six adults and 36 children were prospectively investigated. We analyzed specific immunoglobulin E (sIgE) and sIgG4 levels of venom extracts and components (rApi m1, rApi m10, rVes v1, rVes v5, rPol d5) before and after the first year of VIT. Results: Although cardiovascular symptoms were more common in adults (p < 0.001), the skin was the most affected organ in children (p = 0.009). Serum basal tryptase (sBT) levels were higher in the adults than the children (p < 0.001). The absence of urticaria (odds ratio [OR] 4.208 [95% confidence interval {CI}, 1.395-12.688]; p = 0.011) and sBT ≥ 5.2 ng/mL (OR 11.941 [95% CI, 5.220-39.733]; p < 0.001) were found as the risk factors for grade IV reactions. During VIT, changes in sIgE levels were variable. In the Apis VIT group, we observed remarkable increases in sIgG4 levels in Apis extract and rApi m1 but not in Api m10. Vespula extract, rVes v1, and rVes v5 sIgG4 levels were significantly increased in Vespula VIT group, we also detected significant increases in the Polistes extract and rPol d5 sIgG4 levels, which were not observed in the Apis VIT group. In the patients who received both Apis and Vespula VIT, increases in sIgG4 levels were observed for both venoms. Conclusion: Adults and children can have different clinical patterns. After 1 year, VIT induced a strong IgG4 response. Although Apis immunotherapy (IT) induced Apis sIgG4, excluding Api m10, Vespula IT induced both Vespula and Polistes sIgG4.

BACKGROUND: The lack of evidence regarding optimal desensitization strategies for lung transplant candidates with preformed donor specific anti-human leukocyte antigen antibodies (DSAs) has led to varying approaches among centers towards this patient group. Our institution\'s desensitization protocol for recipients with preformed DSAs and negative flow cytometry crossmatch (FCXM) consists of intravenous immunoglobulin (IVIG) as the sole therapy. The study aimed to determine outcomes using this approach.
METHODS: This retrospective study included adults who underwent lung-only transplantation for the first time between January 2015 and March 2022 at a single center. We excluded patients with positive or missing FCXM results. Transplant recipients with any DSA ≥ 1000 MFI on latest testing within three months of transplant were considered DSA-positive, while recipients with DSAs <1000 MFI and those without DSAs were assigned to the low-level/negative group. Graft survival (time to death/retransplantation) and chronic lung allograft dysfunction (CLAD)-free times were compared between groups using Cox proportional hazards models.
RESULTS: Thirty-six out of 167 eligible patients (22%) were DSA-positive. At least 50% of preformed DSAs had documented clearance (decrease to <1000 MFI) within the first 6 months of transplant. Multivariable Cox regression analyses did not detect a significantly increased risk of graft failure (aHR 1.04 95%CI 0.55-1.97) or chronic lung allograft dysfunction (aHR 0.71 95%CI 0.34-1.52) in DSA-positive patients compared to patients with low-level/negative DSAs. Incidences of antibody-mediated rejection (p = 1.00) and serious thromboembolic events (p = 0.63) did not differ between study groups.
CONCLUSIONS: We describe a single-center experience of administering IVIG alone to lung transplant recipients with preformed DSAs and negative FCXM. Further studies are required to confirm the efficacy of this strategy against other protocols.

Objective:Neosensitizations may be occur during the allergen specific immunotherapy（AIT） due to the differences between allergen vaccine\'s content and a patient\'s molecular sensitization profile. This study investigates whether AIT with HDM extract changes the sensitization profile, whether de novo sensitization occurs, and the clinical importance of the neosensitization. Methods:Fifty-three patients with HDM allergic rhinitis ,with/without asthma, patients were received one year HDM subcutaneous AIT . Fourteen patients were recruited as control group and received only necessary medications. Serum samples were collected at baseline, 6thmoths and 12thof AIT, respectively. Serum samples were tested specific IgE against Der p, Der p 1/2/3 and Der f, Der f 1/2/3, as well as IgG4 against Der p, Der p 1/2 and Der f, Der f 1/2. VAS were collected at the time-points as well. Results:In AIT group, Der p, Der p 1/3, and Der f 1/3 specific IgE levels were significantly higher after one-year treatment, especially for Der p 3. There were 69.2%（18/26） patients whose Der p 3 specific IgE below 0.35 kU/L at baseline but became positive（>0.35 kU/L） after treatment, that is, neosensitization occurred. All tested allergen specific IgG4 level significantly increased after one year AIT treatment and the VAS declined dramatically. However, for patients with neosensitization and without neosensitization, there were no significantly changes concerning to IgG4 level and VAS. Conclusion:Patients undergoing AIT might have a risk of neosensitization to the allergen components in the vaccines. However, the clinical importance of the neosensitization remains unclear and warrants further studies.
目的：由于患者过敏原分子致敏特征和脱敏制剂组成的差异，患者可能在过敏原特异性免疫治疗中产生新的致敏。本研究探讨屋尘螨特异性免疫治疗是否会产生新的致敏，以及新的致敏的临床重要性。 方法：53例尘螨引起的过敏性鼻炎伴随或不伴随哮喘患者接受为期1年的免疫治疗，14例患者作为对照组，按需接受对症药物治疗。分别在治疗前、治疗6个月及12个月采集患者血清，检测屋尘螨、粉尘螨及其组分过敏原（Der p 1/2/3和Der f 1/2/3）特异性IgE抗体及IgG4抗体水平（Der p，Der p 1/2，Der f，Der f 1/2），同时收集3个时间点的VAS评分。 结果：免疫治疗1年后免疫治疗组患者Der p，Der p1/3及Der f 1/3特异性IgE抗体水平显著增高，尤其是Derp 3，其中69.2%（18/26）治疗前该过敏原阴性的患者转为阳性即产生新增过敏。免疫治疗组患者过敏原特异性IgG4抗体浓度1年后显著增高，VAS评分显著下降。对照组特异性IgE及IgG4抗体浓度及VAS评分和治疗前比较，无显著变化。新增致敏的患者和未新增致敏的患者比较，IgG4抗体浓度和VAS评分无显著性差异。 结论：屋尘螨特异性免疫治疗产生了新的致敏，但其临床重要性并不清楚，有待进一步研究。.

暂无摘要。

BACKGROUND: Molecular diagnosis in allergology helps to identify multiple allergenic molecules simultaneously. The use of purified and/or recombinant allergens increases the accuracy of individual sensitization profiles in allergic patients.
OBJECTIVE: To assess the impact of molecular diagnosis through the ImmunoCAPTM ISAC 112 microarray on etiological diagnosis and specific immunotherapy (SIT) prescription. This was compared to the use of conventional diagnoses in pediatric, adolescent, and young adult patients with rhinitis or rhinoconjunctivitis and/or allergic asthma, sensitized to three or more pollen allergens of different botanical species.
METHODS: A multicenter, prospective, observational study was conducted in patients aged 3-25 years who received care at the Allergology service of 14 hospitals in Catalonia from 2017 to 2020. Allergology diagnosis was established based on the patient\'s clinical assessment and the results of the skin prick test and specific immunoglobulin E assays. Subsequently, molecular diagnosis was conducted using ImmunoCAPTM ISAC® 112 to recombinant and/or purified allergen components.
RESULTS: A total of 109 patients were included; 35 (32.1%) were pediatric patients and 74 (67.9%) were adolescents or young adults (mean age: 18 years), with 58.0% being females. A change of 51.0% was observed in SIT prescription following molecular etiological diagnosis by means of a multi-parameter microarray.
CONCLUSIONS: Molecular diagnosis by means of multi-parameter tests increases the accuracy of etiological diagnosis and helps to define an accurate composition of SIT.

暂无摘要。

Objective: To investigate the effects of subcutaneous immunotherapy (SCIT) on patients\' immune markers and metabolic levels in the early stage of allergen treatment, and to gain insight into the role of SCIT in regulating immune responses and metabolic levels, so as to provide reference data for the further discovery of potential biomarkers. Methods: A longitudinal study was used to include 40 subjects who underwent SCIT with dust mite allergens in the Department of Pediatrics of the First Affiliated Hospital of Guangzhou Medical University between November 2017 and February 2022, including 20 subjects each of single mite subcutaneous immunotherapy (SM-SCIT) and double mite subcutaneous immunotherapy (DM-SCIT). In this study, levels of dust mite allergen-specific antibodies and polyunsaturated fatty acid metabolism were measured before and 12 months after treatment, while pulmonary function tests were performed. The therapeutic effects of the patients were followed up by visual analogue scale (VAS), asthma control test (ACT) and total medication scores (TMS). The results were statistically analyzed using t-test and Mann-Whitney U-test. Results: After 12 months of treatment with SCIT, both groups showed a significant decrease in total VAS score (SM-SCIT:Z=-2.298, P<0.05; DM-SCIT:Z=-3.411, P<0.001); total ACT score (SM-SCIT:Z=-2.054, P<0.05; DM-SCIT:Z=-2.014, P<0.05) and total medication scores (SM-SCIT:Z=-3.799, P<0.000 1; DM-SCIT:Z=-3.474, P<0.001) were significantly higher, in addition to significantly higher MMEF75/25 values in the DM-SCIT group (t=-2.253, P<0.05). There was no significant change in sIgE in the SM-SCIT group (P>0.05), and the sIgG4 levels of the Der p, Der f, p 1, p 2, f 2, and p 21 fractions were significantly elevated (Z=-2.651, -3.771, -2.949, -2.912, -2.725, -2.128, and -3.285, respectively, all P<0.05); The sIgE of Der p 2, f 2, p 7 and p 23 fractions(Z=-2.651, -3.771, -2.949, -2.912, -2.725, -2.128, -3.285, all P<0.05) and the sIgG4 levels of the Der p, Der f, p 1, p 2, f 1, f 2, p 10, p 21 and p 23 fractions (Z=-3.808, -3.845, -3.061, -2.688, -2.464, -3.211, -2.371, -2.091, -2.427, all P<0.05) of the DM-SCIT group were significantly elevated. Metabolomics analysis showed that arachidonic acid, docosahexaenoic acid, docosapentaenoic acid, eicosapentaenoic acid, 5, 9, 12-octadecatrienoic acid, 5(S)-hydroxylated eicosatetraenoic acid, and dihomo-gamma-linolenic acid were significantly elevated at the beginning of the treatment period after SM-SCIT treatment (Z of -2.191, -2.497, -1.988, -2.090, -2.19, -2.803, -2.073, all P<0.05); 5(S)-hydroxylated eicosatetraenoic acid showed elevated and alpha-linolenic acid, eicosadienoic acid, and eicosapentaenoic acid were significantly decreased in the DM-SCIT group after treatment (Z=-1.988, -2.090, -2.497, -1.988, respectively, all P<0.05). Correlation analysis showed that arachidonic acid was significantly negatively correlated with changes in dust mite-specific IgG4 (r=-0.499, P<0.05), and that alpha-linolenic acid, 5, 9, 12-octadecatrienoic acid, and eicosapentaenoic acid were positively correlated with the ΔsIgG4 of the dust mite der p 2 (r=0.451, 0.420, 0.474, respectively; all P<0.05). Conclusion: Significant changes in allergen-specific antibody levels and polyunsaturated fatty acid metabolism levels occur during SCIT, and the two may interact and influence each other.
目的： 探讨过敏原皮下特异性免疫治疗（subcutaneous immunotherapy，SCIT）在治疗早期对患者免疫指标和代谢水平的影响，深入了解SCIT治疗在调节免疫反应和代谢水平方面的作用，为进一步发现潜在生物标志物提供参考数据。 方法： 采用纵向研究方法，纳入2017年11月至2022年2月期间于广州医科大学附属第一医院儿科接受尘螨过敏原SCIT的受试者40例，其中单螨制剂治疗（single mite subcutaneous immunotherapy，SM-SCIT）和双螨制剂（double mite subcutaneous immunotherapy，DM-SCIT）治疗受试者各20例。本研究检测了受试者治疗前和治疗12个月后的尘螨过敏原特异性抗体和多元不饱和脂肪酸代谢水平，同时进行了肺功能检查，并通过症状视觉模拟量表（visual analogue scale，VAS）、哮喘控制测试问卷（asthma control test，ACT）和用药总评分（total medication scores，TMS）对患者的疗效进行随访，采用t检验、Mann-Whitney U检验等方法进行结果统计分析。 结果： 经SCIT治疗12个月后，两组的VAS总分（SM-SCIT：Z=-2.298，P<0.05；DM-SCIT：Z=-3.411，P<0.001）显著下降；ACT总分（SM-SCIT：Z=-2.054，P<0.05；DM-SCIT：Z=-2.014，P<0.05）和总用药评分（SM-SCIT：Z=-3.799，P<0.000 1；DM-SCIT：Z=-3.474，P<0.001）显著升高，此外，双螨治疗组MMEF75/25值显著升高（t=-2.253，P<0.05）。单螨治疗组的sIgE无明显变化（P>0.05），Der p、Der f、p 1、p 2、f 2和p 21组分sIgG4水平均显著升高（Z分别为-2.651、-3.771、-2.949、-2.912、-2.725、-2.128、-3.285，P均<0.05）；双螨治疗组的 Der p 2、f 2、p 7和p 23 组分sIgE（Z分别为-1.965、-2.028、-2.406、-2.134，P均<0.05）和Der p、Der f、p 1、p 2、f 1、f 2、p 10、p 21和p 23组分sIgG4水平均显著升高（Z分别为-3.808、-3.845、-3.061、-2.688、-2.464、-3.211、-2.371、-2.091、-2.427，P均<0.05）。代谢组学分析显示，在治疗初期，SM-SCIT治疗后花生四烯酸、二十二碳六烯酸、二十二碳五烯酸、二十碳五烯酸、5，9，12-十八碳三烯酸、5（S）-羟化二十烷四烯酸、二高-γ-亚麻酸显著升高（Z分别为-2.191、-2.497、-1.988、-2.090、-2.19、-2.803、-2.073，P均<0.05）；DM-SCIT组治疗后5（S）-羟化二十烷四烯酸显示升高，α-亚麻酸、二十碳二烯酸、二十碳一烯酸显著下降（Z分别-1.988、-2.090、-2.497、-1.988，P均<0.05）。相关性分析表明，花生四烯酸与尘螨特异性IgG4的变化呈显著负相关（r=-0.499，P<0.05），α-亚麻酸、5，9，12-十八碳三烯酸、二十碳五烯酸与尘螨der p 2的ΔsIgG4（r分别为0.451、0.420、0.474，P均<0.05）呈正相关。 结论： SCIT期间过敏原特异性抗体水平和多不饱和脂肪酸代谢水平发生显著变化，并且两者之间可能相互影响、相互作用。.