The effects of waste sorting in environmental microbiome, THP-1 cell viability and inflammatory responses.

Details

• Personal Author:
  Caetano LA ; Cox J ; Dannemiller KC ; Haines SR ; Korkalainen M ; Reponen T ; Viegas C ; Viegas S
• Description:
  Workers in the waste sorting industry are exposed to diverse bioaerosols. Characterization of these bioaerosols is necessary to more accurately assess the health risks of exposure. The use of high-throughput DNA sequencing for improved analysis of microbial composition of bioaerosols, in combination with their in vitro study in relevant cell cultures, represents an important opportunity to find answers on the biological effects of bioaerosols. This study aimed to characterize by high-throughput sequencing the biodiversity present in complex aerosol mixtures retained in forklift air conditioning filters of a waste-sorting industry and its effects on cytotoxicity and secretion of proinflammatory cytokines in vitro using human macrophages derived from monocytic THP-1 cells. Seventeen filters from the filtration system from forklifts operating in one waste sorting facility and one control filter (similar filter without prior use) were analyzed using high-throughput sequencing and toxicological tests in vitro. A trend of positive correlation was seen between the number of bacterial and fungal OTUs (r = 0.47, p = 0.06). Seven filters (39%) exhibited low or moderate cytotoxicity (p < 0.05). The highest cytotoxic responses had a reduction in cell viability between 17 and 22%. Filter samples evoked proinflammatory responses, especially the production of TNFa. No significant correlation was found between fungal richness and inflammatory responses in vitro. The data obtained stress the need of thorough exposure assessment in waste-sorting industry and to take immunomodulatory properties into consideration for bioaerosols hazard characterization. The broad spectrum of microbial contamination detected in this study demonstrates that adequate monitoring of bioaerosol exposure is necessary to evaluate and minimize risks. The combined techniques can support the implementation of effective environmental monitoring programs of public and occupational health importance. [Description provided by NIOSH]
• Subjects:
  Cytotoxins Immune System Microbiology Occupational Exposure Occupational Health Safety
• Keywords:
  Author Keywords: Waste-sorting Industry; Occupational Exposure Assessment; Microbial Diversity; High-throughput Sequencing; Cell Viability And Proinflammatory Cytokine Levels Bioaerosols; Waste Disposal; Refuse Collection; Microbiology; Cytotoxicity; Cytokines; Occupational Exposure; Exposure Assessment; Immune Reaction;
• ISSN:
  0013-9351
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Ohio ; OSHA Region 5
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  185
• NIOSHTIC Number:
  nn:20065094
• Citation:
  Environ Res 2020 Jun; 185:109450
• Contact Point Address:
  C. Viegas, ESTeSL - Escola Superior de Tecnologia da Saúde de Lisboa, Av. D. João II, Lote 4.69.01, 1990-096, Lisbon, Portugal
• Email:
  carla.viegas@estesl.ipl.pt
• Federal Fiscal Year:
  2020
• Performing Organization:
  University of Cincinnati
• Peer Reviewed:
  True
• Start Date:
  20050701
• Source Full Name:
  Environmental Research
• End Date:
  20260630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:5ff3501ab0c31545e897e62422e114d590a03b1dab79d3e524097d919a848a1bf05446dafa88137c2f14fa174e0edbf8d16ffb85215f2fff605f6fa53014f9a0
• Download URL:
  https://stacks.cdc.gov/view/cdc/249329/cdc_249329_DS1.pdf
• File Type:
  [PDF - 1.01 MB ]