A Prospective Pilot Study to Observe the Effects of Cat Exposure in an Allergen Exposure Chamber (AEC) in Cat Allergic Patients Taking a Food for Special Medical Purposes (holoBLG) for 3 Months

The aim of the study is to investigate the antigen-unspecific effect of a 3 months supplementation with a food for special medical purposes (FSMP) in form of a lozenge containing beta-lactoglobulin (BLG), iron, retinoic acid, zinc and polyphenols (holo-BLG) in patients with allergic rhinoconjunctivitis caused by cat (hair/dander) and the associated symptoms (symptom type and severity) during exposure to cat allergen in an Allergen Exposure Chamber (AEC).

开始日期2021-10-04

申办/合作机构

Bencard Allergie GmbH

NCT04872868 / CompletedN/A

Evaluation of the Long-term Effect of a 3-month Supplementation With Holo-BLG (Food for Special Medical Purposes) in People With Allergic Rhinoconjunctivitis Caused by House Dust Mites During Inhalation Exposure to Mite Allergen in an Exposure Chamber.

The aim of the study is to investigate the long-term effect of a lozenge containing beta-lactoglobulin (BLG), iron, retinoic acid, zinc and polyphenols (holo-BLG) in people with allergic rhinoconjunctivitis caused by house dust mites and the associated symptoms (symptom type and severity) during exposure to house dust mites in an Allergen Exposure Chamber (AEC).
In particular, the study aims to evaluate whether the improvements in symptoms of house dust mite-induced rhinoconjunctivitis observed after 3 months of supplementation with holo-BLG can still be detected 7 to 8 months after the last intake.

开始日期2021-01-27

申办/合作机构

Bencard Allergie GmbH

NCT05186025 / Active, not recruitingN/A

A Long-term, Prospective, Open, Multi-centre, Non-interventional Study to Evaluate the Effectiveness After Treatment With TA Bäume Top (Trees) and TA Gräser Top (Grass) Following a Perennial Posology in Children and Adults, as Well as Proofing the Non-inferiority of Children Compared to Adults

The primary objective of this 5-year study is to demonstrate non-inferiority of children compared to adults by exploring long-term effectiveness after treatment with TA Bäume (trees) and TA Gräser (grass) following a perennial posology.

开始日期2020-11-06

申办/合作机构

Bencard Allergie GmbH

100 项与 Bencard Allergie GmbH 相关的临床结果

登录后查看更多信息

0 项与 Bencard Allergie GmbH 相关的专利（医药）

登录后查看更多信息

项与 Bencard Allergie GmbH 相关的文献（医药）

2024-01-01·Allergy

Influence of antigen density and TLR ligands on preclinical efficacy of a VLP‐based vaccine against peanut allergy

Article

作者: Zeltins, Andris ; Krenger, Pascal S ; Velazquez, Thalia L C ; Sobczak, Jan ; Heath, Matthew D ; Hewings, Simon ; Josi, Romano ; Balke, Ina ; Bachmann, Martin F ; Kramer, Matthias F ; Skinner, Murray A ; Scott, Callum J W

AbstractBackgroundVirus‐like particle (VLP) Peanut is a novel immunotherapeutic vaccine candidate for the treatment of peanut allergy. The active pharmaceutical ingredient represents cucumber mosaic VLPs (CuMVTT‐VLPs) that are genetically fused with one of the major peanut allergens, Ara h 2 (CuMVTT‐Ara h 2). We previously demonstrated the immunogenicity and the protective capacity of VLP Peanut‐based immunization in a murine model for peanut allergy. Moreover, a Phase I clinical trial has been initiated using VLP Peanut material manufactured following a GMP‐compliant manufacturing process. Key product characterization studies were undertaken here to understand the role and contribution of critical quality attributes that translate as predictive markers of immunogenicity and protective efficacy for clinical vaccine development.MethodThe role of prokaryotic RNA encapsulated within VLP Peanut on vaccine immunogenicity was assessed by producing a VLP Peanut batch with a reduced RNA content (VLP Peanut low RNA). Immunogenicity and peanut allergen challenge studies were conducted with VLP Peanut low RNA, as well as with VLP Peanut in WT and TLR 7 KO mice. Furthermore, mass spectrometry and SDS‐PAGE based methods were used to determine Ara h 2 antigen density on the surface of VLP Peanut particles. This methodology was subsequently applied to investigate the relationship between Ara h 2 antigen density and immunogenicity of VLP Peanut.ResultsA TLR 7 dependent formation of Ara h 2 specific high‐avidity IgG antibodies, as well as a TLR 7 dependent change in the dominant IgG subclass, was observed following VLP Peanut vaccination, while total allergen‐specific IgG remained relatively unaffected. Consistently, a missing TLR 7 signal caused only a weak decrease in allergen tolerability after vaccination. In contrast, a reduced RNA content for VLP Peanut resulted in diminished total Ara h 2 specific IgG responses, followed by a significant impairment in peanut allergen tolerability. The discrepant effect on allergen tolerance caused by an absent TLR 7 signal versus a reduced RNA content is explained by the observation that VLP Peanut‐derived RNA not only stimulates TLR 7 but also TLR 3. Additionally, a strong correlation was observed between the number of Ara h 2 antigens displayed on the surface of VLP Peanut particles and the vaccine's immunogenicity and protective capacity.ConclusionsOur findings demonstrate that prokaryotic RNA encapsulated within VLP Peanut, including antigen density of Ara h 2 on viral particles, are key contributors to the immunogenicity and protective capacity of the vaccine. Thus, antigenicity and RNA content are two critical quality attributes that need to be determined at the stage of manufacturing, providing robust information regarding the immunogenicity and protective capacity of VLP Peanut in the mouse which has translational relevance to the human setting.

2023-08-01·Probiotics and Antimicrobial Proteins2区 · 工程技术

Ex Vivo Immunomodulatory Effects of Lactobacillus-, Lacticaseibacillus-, and Bifidobacterium-Containing Synbiotics on Human Peripheral Blood Mononuclear Cells and Monocyte-Derived Dendritic Cells in the Context of Grass Pollen Allergy

2区 · 工程技术

Article

作者: Blank, Simon ; Heath, Matthew D ; Schnautz, Benjamin ; Kramer, Matthias F ; Schmidt-Weber, Carsten B ; Kotz, Sebastian ; Zissler, Ulrich M ; Heldner, Alexander ; Chaker, Adam ; Jakwerth, Constanze A

AbstractSensing of the intestinal microbiota by the host immune system is important to induce protective immune responses. Hence, modification of the gut microbiota might be able to prevent or treat allergies, mediated by proinflammatory Th2 immune responses. The aim was to investigate the ex vivo immunomodulatory effects of the synbiotics Pollagen® and Kallergen®, containing the probiotic bacterial strains Lactobacillus, Lacticaseibacillus and Bifidobacterium, in the context of grass pollen allergy. Peripheral blood mononuclear cells (PBMCs) from grass pollen–allergic patients and healthy controls were stimulated with grass pollen extract (GPE) and synbiotics and Gata3 expression and cytokine secretion analyzed. Monocyte-derived dendritic cells (MoDCs) cells were matured in the presence of GPE and synbiotics, co-cultured with autologous naïve T cells and maturation markers and cytokine secretion analyzed. GPE stimulation of PBMCs from grass pollen–allergic patients resulted in a significant higher production of the Th2 cytokines IL-4, IL-5, IL-9 and IL-13 compared to healthy controls. Gata3+CD4+ T cell induction was independent of the allergic status. The synbiotics promoted IL-10 and IFN-γ secretion and downregulated the GPE-induced Th2-like phenotype. Co-culturing naïve T cells with MoDCs, matured in the presence of GPE and synbiotics, shifted the GPE-induced Th2 cytokine release towards Th1-Th17-promoting conditions in allergic subjects. The investigated synbiotics are effective in downregulating the GPE-induced Th2 immune response in PBMCs from grass pollen–allergic patients as well as in autologous MoDC-T cell stimulation assays. In addition to increased IL-10 release, the data indicates a shift from a Th2- to a more Th1- and Th17-like phenotype.

2023-07-01·Allergy

The next generation virus‐like particle platform for the treatment of peanut allergy

Article

作者: Zeltiņš, Andris ; Skinner, Murray A ; Scott, Callum J W ; Sobczak, Jan M ; Balke, Ina ; Kündig, Thomas M ; Vogel, Monique ; Mohsen, Mona O ; Heath, Matthew D ; Kramer, Matthias F ; Bachmann, Martin F ; Storni, Federico ; Reseviča, Gunta ; Carreno Velazquez, Thalia L ; Krenger, Pascal S

AbstractBackgroundAllergy to peanut is one of the leading causes of anaphylactic reactions among food allergic patients. Immunization against peanut allergy with a safe and protective vaccine holds a promise to induce durable protection against anaphylaxis caused by exposure to peanut. A novel vaccine candidate (VLP Peanut), based on virus‐like particles (VLPs), is described here for the treatment of peanut allergy.Methods and ResultsVLP Peanut consists of two proteins: a capsid subunit derived from Cucumber mosaic virus engineered with a universal T‐cell epitope (CuMVTT) and a CuMVTT subunit fused with peanut allergen Ara h 2 (CuMVTT‐Ara h 2), forming mosaic VLPs. Immunizations with VLP Peanut in both naïve and peanut‐sensitized mice resulted in a significant anti‐Ara h 2 IgG response. Local and systemic protection induced by VLP Peanut were established in mouse models for peanut allergy following prophylactic, therapeutic, and passive immunizations. Inhibition of FcγRIIb function resulted in a loss of protection, confirming the crucial role of the receptor in conferring cross protection against peanut allergens other than Ara h 2.ConclusionVLP Peanut can be delivered to peanut‐sensitized mice without triggering allergic reactions, while remaining highly immunogenic and offering protection against all peanut allergens. In addition, vaccination ablates allergic symptoms upon allergen challenge. Moreover, the prophylactic immunization setting conferred the protection against subsequent peanut‐induced anaphylaxis, showing the potential for preventive vaccination. This highlights the effectiveness of VLP Peanut as a prospective break‐through immunotherapy vaccine candidate toward peanut allergy. VLP Peanut has now entered clinical development with the study PROTECT.

100 项与 Bencard Allergie GmbH 相关的药物交易

登录后查看更多信息

100 项与 Bencard Allergie GmbH 相关的转化医学

登录后查看更多信息