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ADDITIONAL MATERIALS AVAILABLE on the HEI WEBSITE Research Report 198 Understanding the Early Biological Effects of Isoprene-Der

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ADDITIONAL MATERIALS AVAILABLE on the HEI WEBSITE Research Report 198 Understanding the Early Biological Effects of Isoprene-Der ADDITIONAL MATERIALS AVAILABLE ON THE HEI WEBSITE Research Report 198 Understanding the Early Biological Effects of Isoprene-Derived Particulate Matter Enhanced by Anthropogenic Pollutants Surratt et al. Appendix A. Quality Assurance and Calibrations for DTT Assay Appendix B. Additional Characterization Results of Exposure Conditions Appendix C. Additional Results from the DTT Assay Appendix D. Cytotoxicity Measurements of Exposure Conditions Appendix E. Genes Analyzed and Additional Gene Expression Data for Exposures These Additional Materials were not formatted or edited by HEI. This document was part of the HEI Review Committee’s review process. Correspondence may be addressed to Dr. Jason D. Surratt, 135 Dauer Drive, 164 Rosenau Hall, Campus Box #7431; e-mail: [email protected]. Although this document was produced with partial funding by the United States Environmental Protection Agency under Assistance Award CR–83467701 to the Health Effects Institute, it has not been subjected to the Agency’s peer and administrative review and therefore may not necessarily reflect the views of the Agency, and no official endorsement by it should be inferred. The contents of this document also have not been reviewed by private party institutions, including those that support the Health Effects Institute; therefore, it may not reflect the views or policies of these parties, and no endorsement by them should be inferred. © 2019 Health Effects Institute, 75 Federal Street, Suite 1400, Boston, MA 02110-1817 Appendix A Quality assurance and calibrations for DTT Assay 0.5 0.4 0.3 0.2 Abs (412 nm) (412 Abs 0.1 0.0 #1 #2 #1: buffer + DTT+ sample #2: buffer + sample + DTT Figure A.1. To test if there are significant differences regarding the order of solution additions under our experimental conditions, we used 1,4-NQ standards to test this order when using the DTT assay. We tested this with the 1,4-NQ standards when adding buffer, then DTT, and then samples versus when adding buffer, then sample, then DTT. No significant difference was observed likely due to agents (solutions) made fresh each time the DTT assay was conducted and also because agents were added within a few minutes in order to prevent DTT from being oxidized in air. (A) (B) Figure A.2. Calibration curves for the measured absorbance versus (A) nmol of DTT consumed and (B) various amount of 1,4-NQ reacted with 25 nmol DTT. 0.65 0.60 0.55 0.50 0.45 0.40 0.35 0.30 0.25 0.20 Abs (412 nm) (412 Abs 0.15 0.10 0.05 0.00 0 10 30 50 Spiking volume of DMSO (µL) Figure A.3. DMSO consuming DTT was negligible up to a spiking volume of 30 µL. However, with a larger spiking volume (i.e., 50 µL), a slightly decreasing absorbance at 412 nm (by 2%) was observed. 0.65 0.60 0.55 0.50 0.45 0.40 0.35 0.30 0.25 0.20 Abs (412 nm) Abs 0.15 0.10 0.05 0.00 Blank filter Blank H2SO4 seed H2SO4 MgSO4 seed MgSO4 H2O+MgSO4 seed H2O+MgSO4 Figure A.4. To examine the effects of aerosol acidity and the presence of Mg2+ on DTT responses, H2SO4 and MgSO4 aerosols were atomized separately into the chamber and collected filter samples (n=3) to compare with the responses from acidified sulfate aerosols (1:1 MgSO4:H2SO4). No significant difference was observed compared to the blank filter samples. APPENDIX B Additional Characterization Results of Exposure Conditions Figure B.1. (a) GC/EI-MS total ion chromatograms (TICs) and (b) UPLC/ESI-HR-QTOFMS base peak chromatograms (BPCs) from a (1) dark control chamber experiment, (2) isoprene- derived SOA exposure chamber experiment, and (3) PM2.5 sample collected from Yorkville, GA during summer 2010. Figure B.2. Time profiles of measured aerosol mass concentrations during the reactive uptake of 166 (A) trans-β-IEPOX, and (B) MAE by acidified sulfate aerosols in chamber experiments. (A) (B) (C) Figure B.3. GC/MS total ion current chromatograms (TICs) of TMS-derivatized particle-phase reaction products from reactive uptake of (A) trans-β-IEPOX and (B) MAE onto acidified sulfate seed aerosol in chamber experiments, and (C) PM2.5 field sample from Yorkville, GA. Mixtures of isomeric SOA products are grouped as one peak. Figure B.4. UPLC/ESI-HR-QTOFMS total ion current chromatograms (TICs) of particle-phase 176 reaction products from reactive uptake of (A) trans-β-IEPOX and (B) MAE onto acidified 177 sulfate seed aerosol in chamber experiments, and (C) a PM2.5 field sample from Yorkville, GA. 178 Figure B.5. Experimental time profile of measured aerosol mass concentrations during ISOPOOH oxidation experiments. Appendix C Additional Results from the DTT Assay Table C.1. DTT activity of PM constituents measured in this study. Results in this study are expressed as mean ± standard error of the mean (SEM), n=3 for each sample. DTT activity Sample (nmol of DTT consumed/min/μg sample) Pure Compounds IEPOX 7.00±1.39 ×10-5 2-MT 4.44±0.92 ×10-5 2-MT_OS 5.77±2.07 ×10-5 MAE 9.84±0.97 ×10-5 2-MG 2.51±0.37 ×10-4 2-MG_OS 7.58±1.14 ×10-5 ISOPOOH 4.90±2.20 ×10-1 Outdoor Chamber Samples Isoprene SOA 2.10±0.22 ×10-3 MACR SOA 2.30±0.27 ×10-3 Indoor Chamber Samples IEPOX-derived SOA 1.79±0.16 ×10-3 MAE-derived SOA 3.13±0.30 ×10-3 Table C.2. Means Comparison (Fisher Test) of Isoprene SOA Types Comparisons of Aerosol Type MeanDiff SEM t Value Prob Alpha Sig LCL UCL MACR SOA vs. isoprene SOA 1.64E-04 2.58E-04 0.6381 0.5413 0.05 0 -4.30E-04 7.59E-04 IEPOX SOA vs. isoprene SOA -4.93E-04 2.58E-04 -1.9133 0.0921 0.05 0 -1.09E-03 1.01E-04 IEPOX SOA vs. MACR SOA -6.58E-04 2.58E-04 -2.5514 0.0341 0.05 1 -1.25E-03 -6.32E-05 MAE SOA vs. isoprene SOA 4.30E-04 2.58E-04 1.6694 0.1336 0.05 0 -1.64E-04 1.02E-03 MAE SOA vs. MACR SOA 2.66E-04 2.58E-04 1.0313 0.3326 0.05 0 -3.29E-04 8.60E-04 MAE SOA vs. IEPOX SOA 9.23E-04 2.58E-04 3.5827 0.0072 0.05 1 3.29E-04 1.52E-03 7.0×10 -1 6.0×10 -1 5.0×10 -1 4.0×10 -1 3.0×10 -1 2.0×10 -1 1.0×10 -1 NIOG 3.0×10 -4 2.0×10 -4 1.0×10 -4 0 MAE 2-MT 2-MG IEPOX 2-MT_OS 2-MG_OS ISOPOOH Figure C.1 NIOG of isoprene-derived epoxides (IEPOX and MAE), their hydrolysis products (2-MT and 2-MG), their organosulfate derivatives (2-MT_OS and 2-MG_OS), and the isoprene- derived hydroxyhydroperoxide (ISOPOOH) that are known to contribute to ambient SOA. APPENDIX D Cytotoxicity Measurements of Exposure Conditions Figure D.1. LDH release for (a) clean air controls, (b) EAVES exposures, normalized to incubator control, and (c) resuspension exposures, normalized to KBM only control. **p<0.005 and ***p<0.0005. Figure D.2. Cytotoxicity for each exposure type for the ISOPOOH-derived SOA system represented as % cell death determined by LDH assay. Appendix E Full Lists of Genes Analyzed and Additional Gene Expression Data of Exposures Table E.1. Gene symbols and full names of 84 oxidative stress-associated genes and housekeeping genes included in RT² Profiler™ PCR Array Human Oxidative Stress Pathway Plus (PAHS-065Y). # Gene Symbol Full Name 1 ALB Albumin 2 ALOX12 Arachidonate 12-lipoxygenase 3 AOX1 Aldehyde oxidase 1 4 APOE Apolipoprotein E 5 ATOX1 ATX1 antioxidant protein 1 homolog (yeast) 6 BNIP3 BCL2/adenovirus E1B 19kDa interacting protein 3 7 CAT Catalase 8 CCL5 Chemokine (C-C motif) ligand 5 9 CCS Copper chaperone for superoxide dismutase 10 CYBB Cytochrome b-245, beta polypeptide 11 CYGB Cytoglobin 12 DHCR24 24-dehydrocholesterol reductase 13 DUOX1 Dual oxidase 1 14 DUOX2 Dual oxidase 2 15 DUSP1 Dual specificity phosphatase 1 16 EPHX2 Epoxide hydrolase 2, cytoplasmic 17 EPX Eosinophil peroxidase 18 FOXM1 Forkhead box M1 19 FTH1 Ferritin, heavy polypeptide 1 20 GCLC Glutamate-cysteine ligase, catalytic subunit 21 GPX1 Glutathione peroxidase 1 22 GPX2 Glutathione peroxidase 2 (gastrointestinal) 23 GPX3 Glutathione peroxidase 3 (plasma) 24 GPX4 Glutathione peroxidase 4 (phospholipid hydroperoxidase) 25 GPX5 Glutathione peroxidase 5 (epididymal androgen-related protein) 26 GSR Glutathione reductase 27 GSS Glutathione synthetase 28 GSTP1 Glutathione S-transferase pi 1 29 GSTZ1 Glutathione transferase zeta 1 30 HSPA1A Heat shock 70kDa protein 1A 31 KRT1 Keratin 1 32 LPO Lactoperoxidase 33 MB Myoglobin 34 MBL2 Mannose-binding lectin (protein C) 2, soluble 35 MPO Myeloperoxidase 36 MPV17 MpV17 mitochondrial inner membrane protein 37 MSRA Methionine sulfoxide reductase A 38 MT3 Metallothionein 3 39 NCF1 Neutrophil cytosolic factor 1 40 NCF2 Neutrophil cytosolic factor 2 41 NOS2 Nitric oxide synthase 2, inducible 42 NOX4 NADPH oxidase 4 43 NOX5 NADPH oxidase, EF-hand calcium binding domain 5 44 NUDT1 Nudix (nucleoside diphosphate linked moiety X)-type motif 1 45 PDLIM1 PDZ and LIM domain 1 46 PRDX1 Peroxiredoxin 1 47 PRDX2 Peroxiredoxin 2 48 PRDX3 Peroxiredoxin 3 49 PRDX4 Peroxiredoxin 4 50 PRDX5 Peroxiredoxin 5 51 PRDX6 Peroxiredoxin 6 52 PRNP Prion protein 53 PTGS1 Prostaglandin-endoperoxide synthase 1 (prostaglandin G/H synthase and cyclooxygenase) 54 PTGS2 Prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase) 55 RNF7 Ring finger protein 7 56 VIMP Selenoprotein S 57 SEPP1 Selenoprotein P, plasma, 1 58 SFTPD Surfactant protein D 59 SIRT2 Sirtuin 2 60 SOD1 Superoxide dismutase 1, soluble 61 SOD2 Superoxide dismutase 2, mitochondrial 62 SOD3 Superoxide dismutase 3, extracellular 63 SQSTM1 Sequestosome 1 64 SRXN1 Sulfiredoxin 1 65 TPO Thyroid peroxidase 66 TTN Titin 67 TXNRD2 Thioredoxin reductase 2 68 UCP2 Uncoupling protein 2 (mitochondrial, proton carrier) 69 AKR1C2 Aldo-keto reductase family 1, member C2 (dihydrodiol dehydrogenase 2; bile acid binding protein; 3-alpha hydroxysteroid dehydrogenase, type III) 70 BAG2 BCL2-associated athanogene 2 71 FHL2 Four and a half LIM domains
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