Carbon Nanotube Exposure Triggers a Cerebral Peptidomic Response: Barrier Compromise, Neuroinflammation, and a Hyperexcited State

Details

• Alternative Title:
  Toxicol Sci
• Personal Author:
  Mostovenko, Ekaterina ; Saunders, Samantha ; Muldoon, Pretal P. ; Bishop, Lindsey ; Campen, Matthew J. ; Erdely, Aaron ; Ottens, Andrew K.
• Description:
  The unique physicochemical properties of carbon nanomaterials and their ever-growing utilization generate a serious concern for occupational risk. Pulmonary exposure to these nanoparticles induces local and systemic inflammation, cardiovascular dysfunction, and even cognitive deficits. Although multiple routes of extrapulmonary toxicity have been proposed, the mechanism for and manner of neurologic effects remain minimally understood. Here, we examine the cerebral spinal fluid (CSF)-derived peptidomic fraction as a reflection of neuropathological alterations induced by pulmonary carbon nanomaterial exposure. Male C57BL/6 mice were exposed to 10 or 40 µg of multiwalled carbon nanotubes (MWCNT) by oropharyngeal aspiration. Serum and CSFs were collected 4 h post exposure. An enriched peptide fraction of both biofluids was analyzed using ion mobility-enabled data-independent mass spectrometry for label-free quantification. MWCNT exposure induced a prominent peptidomic response in the blood and CSF; however, correlation between fluids was limited. Instead, we determined that a MWCNT-induced peptidomic shift occurred specific to the CSF with 292 significant responses found that were not in serum. Identified MWCNT-responsive peptides depicted a mechanism involving aberrant fibrinolysis (fibrinopeptide A), blood-brain barrier permeation (homeobox protein A4), neuroinflammation (transmembrane protein 131L) with reactivity by astrocytes and microglia, and a pro-degradative (signal transducing adapter molecule, phosphoglycerate kinase), antiplastic (AF4/FMR2 family member 1, vacuolar protein sorting-associated protein 18) state with the excitation-inhibition balance shifted to a hyperexcited (microtubule-associated protein 1B) phenotype. Overall, the significant pathologic changes observed were consistent with early neurodegenerative disease and were diagnostically reflected in the CSF peptidome.
• Subjects:
  Animals Article Blood-brain Barrier Carbon Nanotubes Cerebrospinal Fluid Excitotoxicity Inflammation Lung Male Mass Spectrometry Mice Mice, Inbred C57BL Nanoparticles Nanotubes, Carbon Neurodegenerative Disease Neurodegenerative Diseases Neuroinflammation Peptidome Peptidomics

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• Source:
  Toxicol Sci. 182(1):107-119
• Pubmed ID:
  33892499
• Pubmed Central ID:
  PMC8363048
• Document Type:
  Journal Article
• Funding:
  939ZXFL/NTRC/ ; R21 OH010495/OH/NIOSH CDC HHSUnited States/ ; CC999999/ImCDC/Intramural CDC HHSUnited States/ ; R01OH010495/OH/NIOSH CDC HHSUnited States/ ; R01 ES014639/ES/NIEHS NIH HHSUnited States/
• Volume:
  182
• Issue:
  1
• Collection(s):
  CDC Public Access
• Main Document Checksum:
  urn:sha256:c0b3dba0ffca6b3bac4d890596c765830a51c18c66865457d00025bed2656406
• Download URL:
  https://stacks.cdc.gov/view/cdc/108868/cdc_108868_DS1.pdf
• File Type:
  [PDF - 2.18 MB ]