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Doyen V, Gautrin D, Vandenplas O, Malo JL. Comparison of high- and low-molecular-weight sensitizing agents causing occupational asthma: an evidence-based insight. Expert Rev Clin Immunol 2024; 20:635-653. [PMID: 38235552 DOI: 10.1080/1744666x.2024.2306885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Accepted: 01/15/2024] [Indexed: 01/19/2024]
Abstract
INTRODUCTION The many substances used at the workplace that can cause sensitizer-induced occupational asthma are conventionally categorized into high-molecular-weight (HMW) agents and low-molecular-weight (LMW) agents, implying implicitly that these two categories of agents are associated with distinct phenotypic profiles and pathophysiological mechanisms. AREAS COVERED The authors conducted an evidence-based review of available data in order to identify the similarities and differences between HMW and LMW sensitizing agents. EXPERT OPINION Compared with LMW agents, HMW agents are associated with a few distinct clinical features (i.e. concomitant work-related rhinitis, incidence of immediate asthmatic reactions and increase in fractional exhaled nitric oxide upon exposure) and risk factors (i.e. atopy and smoking). However, some LMW agents may exhibit 'HMW-like' phenotypic characteristics, indicating that LMW agents are a heterogeneous group of agents and that pooling them into a single group may be misleading. Regardless of the presence of detectable specific IgE antibodies, both HMW and LMW agents are associated with a mixed Th1/Th2 immune response and a predominantly eosinophilic pattern of airway inflammation. Large-scale multicenter studies are needed that use objective diagnostic criteria and assessment of airway inflammatory biomarkers to identify the pathobiological pathways involved in OA caused by the various non-protein agents.
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Affiliation(s)
- Virginie Doyen
- Department of Chest Medicine, Centre Hospitalier Universitaire UCL Namur, Université Catholique de Louvain, Yvoir, Belgium
| | - Denyse Gautrin
- Université de Montréal and Hôpital du Sacré-Cœur de Montréal, Montréal, Canada
| | - Olivier Vandenplas
- Department of Chest Medicine, Centre Hospitalier Universitaire UCL Namur, Université Catholique de Louvain, Yvoir, Belgium
| | - Jean-Luc Malo
- Université de Montréal and Hôpital du Sacré-Cœur de Montréal, Montréal, Canada
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Hénault-Ethier L, Quinche M, Reid B, Hotte N, Fortin A, Normandin É, de La Rochelle Renaud G, Rasooli Zadeh A, Deschamps MH, Vandenberg G. Opportunities and challenges in upcycling agri-food byproducts to generate insect manure (frass): A literature review. WASTE MANAGEMENT (NEW YORK, N.Y.) 2024; 176:169-191. [PMID: 38301601 DOI: 10.1016/j.wasman.2023.12.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 11/24/2023] [Accepted: 12/14/2023] [Indexed: 02/03/2024]
Abstract
A range of issues related to sustainability in the agrifood industry have spurred interest in mass production of insects as human food and animal feed alternatives. This rapidly evolving sector addresses several challenges, including the management of food waste or agrifood by-products and the production of alternative animal proteins demonstrating low environmental impacts that improve sector circularity. The mass production of insects on agrifood processing wastes or by-products represents an opportunity to address these challenges. While the production of insects offers prospects for sustainable protein production, a major side stream is the production of frass or larval excrement including uneaten feed and chitin-rich exuviae (derived from multiple larval moults). The production of each tonne of edible insects generates 2 to 4 tonnes of frass with an interesting potential in agriculture versus traditional organic amendments (compost, manure, biochar). This review aims to demonstrate the characteristics of frass, its common harvest and conditioning methods, its optimal application rates for planting crops, the mechanisms by which it can protect plants against biotic and abiotic stresses and demystify the risks and potential associated with its application in agriculture. The characteristics of frass are compared with those of conventional fertilizers or other. This report also compiles the Canadian, US and European regulatory frameworks as a novel plant fertilizer and aims to pave the way for future research necessary for its valorization in plant production.
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Affiliation(s)
- Louise Hénault-Ethier
- Institut national de la recherche scientifique, Eau Terre, Environnement Research Center, Québec, G1K 9A9, Canada; TriCycle, Montreal, Québec, H4N 2R9, Canada.
| | - Mélissa Quinche
- Institut national de la recherche scientifique, Eau Terre, Environnement Research Center, Québec, G1K 9A9, Canada
| | - Béatrice Reid
- Institut national de la recherche scientifique, Eau Terre, Environnement Research Center, Québec, G1K 9A9, Canada
| | - Noémie Hotte
- TriCycle, Montreal, Québec, H4N 2R9, Canada; Université de Sherbrooke, Québec, J1K 2R1, Canada
| | - Alexis Fortin
- TriCycle, Montreal, Québec, H4N 2R9, Canada; École de Technologie Supérieure, 1100 Rue Notre-Dame Ouest, Montréal, Québec, H3C 1K3, Canada
| | - Étienne Normandin
- TriCycle, Montreal, Québec, H4N 2R9, Canada; Centre sur la Biodiversité, Université de Montréal, 4101 R. Sherbrooke E, Montréal, Québec, H1X 2B2, Canada
| | | | - Aliyeh Rasooli Zadeh
- Institut national de la recherche scientifique, Eau Terre, Environnement Research Center, Québec, G1K 9A9, Canada
| | - Marie-Hélène Deschamps
- Département des sciences animales, Faculté des sciences de l'agriculture et de l'alimentation, Université Laval, Québec, G1V 0A6, Canada
| | - Grant Vandenberg
- Département des sciences animales, Faculté des sciences de l'agriculture et de l'alimentation, Université Laval, Québec, G1V 0A6, Canada
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