{"title":"Dimensional characteristics of the major types of amphibole mineral particles and the implications for carcinogenic risk assessment.","authors":"Andrey A Korchevskiy, Ann G Wylie","doi":"10.1080/08958378.2021.2024304","DOIUrl":null,"url":null,"abstract":"<p><p><b>Context:</b> Though some significant advances have been made in recent decades to evaluate the importance of size and morphology (habit) of elongate mineral particles (EMPs), further research is needed to better understand the role of each dimensional metric in determining the levels of cancer potency.<b>Objective:</b> To determine dimensional parameters most relevant for predicting cancer potency of durable elongate particles, specifically amphibole and durable silicate minerals generally.<b>Methods:</b> A database on dimensional and other relevant characteristics of elongate amphibole mineral particles was created, containing particle-by-particle information for 128 099 particles. Integral statistical characteristics on dimensionality of various amphibole types and morphological habits of EMPs were calculated, compared, and correlated with published mesothelioma and lung cancer potency factors.<b>Results:</b> The highest absolute Pearson correlation (<i>r</i> = 0.97, <i>r</i><sup>2</sup> = 0.94, <i>p</i> < 0.05) was achieved between mesothelioma potency (R<sub>M</sub>) and specific surface area. The highest correlation with adjusted lung cancer potency was found with particle aspect ratio (AR) (<i>r</i> = 0.80, <i>r</i><sup>2</sup> = 0.64, <i>p</i> < 0.05). Cluster analysis demonstrates that fractions of thin fibers (width less than 0.15 and 0.25 µm) also closely relate both to lung cancer and R<sub>M</sub>. Asbestiform and non-asbestiform populations of amphiboles significantly differ by dimensionality and carcinogenic potency.<b>Conclusions:</b> Dimensional parameters and morphological habits of EMPs are the main drivers for the observable difference in cancer potency among amphibole populations.</p>","PeriodicalId":13561,"journal":{"name":"Inhalation Toxicology","volume":"34 1-2","pages":"24-38"},"PeriodicalIF":2.0000,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"13","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Inhalation Toxicology","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1080/08958378.2021.2024304","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2022/1/10 0:00:00","PubModel":"Epub","JCR":"Q4","JCRName":"TOXICOLOGY","Score":null,"Total":0}
引用次数: 13
Abstract
Context: Though some significant advances have been made in recent decades to evaluate the importance of size and morphology (habit) of elongate mineral particles (EMPs), further research is needed to better understand the role of each dimensional metric in determining the levels of cancer potency.Objective: To determine dimensional parameters most relevant for predicting cancer potency of durable elongate particles, specifically amphibole and durable silicate minerals generally.Methods: A database on dimensional and other relevant characteristics of elongate amphibole mineral particles was created, containing particle-by-particle information for 128 099 particles. Integral statistical characteristics on dimensionality of various amphibole types and morphological habits of EMPs were calculated, compared, and correlated with published mesothelioma and lung cancer potency factors.Results: The highest absolute Pearson correlation (r = 0.97, r2 = 0.94, p < 0.05) was achieved between mesothelioma potency (RM) and specific surface area. The highest correlation with adjusted lung cancer potency was found with particle aspect ratio (AR) (r = 0.80, r2 = 0.64, p < 0.05). Cluster analysis demonstrates that fractions of thin fibers (width less than 0.15 and 0.25 µm) also closely relate both to lung cancer and RM. Asbestiform and non-asbestiform populations of amphiboles significantly differ by dimensionality and carcinogenic potency.Conclusions: Dimensional parameters and morphological habits of EMPs are the main drivers for the observable difference in cancer potency among amphibole populations.
期刊介绍:
Inhalation Toxicology is a peer-reviewed publication providing a key forum for the latest accomplishments and advancements in concepts, approaches, and procedures presently being used to evaluate the health risk associated with airborne chemicals.
The journal publishes original research, reviews, symposia, and workshop topics involving the respiratory system’s functions in health and disease, the pathogenesis and mechanism of injury, the extrapolation of animal data to humans, the effects of inhaled substances on extra-pulmonary systems, as well as reliable and innovative models for predicting human disease.