Abstract
Polycyclic aromatic hydrocarbons, including benzo[a]pyrene (BaP), are environmental contaminants formed during organic material combustion (e.g. burning fossil fuels and cigarette smoke). BaP toxicity is mediated, in part, by activation of the aryl hydrocarbon receptor and formation of reactive metabolites, both of which lead to increased oxidative stress. Since air pollution and cigarette smoking are known to increase cardiovascular disease in humans, the objective of this study was to determine the effects of 7-day intranasal BaP exposure on circadian blood pressure patterns, arterial stiffness, and possible sources of oxidative stress in radiotelemetry-implanted rats. Arterial pulse wave dP/dt was used an indicator of arterial stiffness and was compared to both functional (nitric oxide production and bioactivity, endothelin-1 levels) and structural (wall thickness) features of the arterial wall. In addition, histology of lung, heart, and liver were examined as well as pulmonary and hepatic cytochrome P450 1A1 (CYP1A1) activity. BaP exposure altered the circadian pattern of blood pressure, with a reduction in the normal dipping pattern during sleep. This was associated with increased neutrophil recruitment in the lungs of BaP-exposed rats. In contrast, BaP had no effect on cardiovascular tissue histology, arterial stiffness, oxidative stress or lung and liver CYP1A1 activity. Thus, the current study does not support the hypothesis that BaP reactive metabolites increase oxidative stress leading to reduced vascular NO bioactivity and increased blood pressure. Instead, the current study suggests that inflammation, detected only in the lung, is associated with altered circadian rhythm of blood pressure.
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Aboutabl ME, Zordoky BNM, El-Kadi AOS (2009) 3-Methylcholanthrene and benzo(a)pyrene modulate cardiac cytochrome P450 gene expression and arachidonic acid metabolism in male Sprague Dawley rats. Brit J Pharmacol 158:1808–1819
Auchincloss AH, Diez Roux AV, Dvonch JT, Brown PL, Barr RG, Daviglus ML, Goff DC, Kaufman JD, O’Neill MS (2008) Associations between recent exposure to ambient fine particulate matter and blood pressure in the Multi-ethnic Study of Atherosclerosis (MESA). Environ Health Perspect 116:486–491
Blacher J, Asmar R, Djane S, London GM, Safar ME (1999) Aortic pulse wave velocity as a marker of cardiovascular risk in hypertensive patients. Hypertens 33:1111–1117
Borm PJA, Knaapen AM, Schins RPF, Godschalk RWL, van Schooten FJ (1997) Neutrophils amplify the formation of DNA adducts by benzo[a]pyrene in lung target cells. Environ Health Perspect 105(Suppl 5):1089–1093
Burstyn I, Kromhout H, Partanen T, Svane O, Langård S, Ahrens W, Kauppinen T, Stücker I, Shaham J, Heederik D, Ferro G, Heikkilä P, Hooiveld M, Johansen C, Randem BG, Boffetta P (2005) Polycyclic aromatic hydrocarbons and fatal ischemic heart disease. Epidemiol 16:744–750
Curfs DM, Knaapen AM, Pachen DM, Gijbels MJ, Lutgens E, Smook ML, Kockx MM, Daemen MJ, van Schooten FJ (2005) Polycyclic aromatic hydrocarbons induce an inflammatory atherosclerotic plaque phenotype irrespective of their DNA binding properties. FASEB J 19:1290–1292
Dalton TP, Kerzee JK, Wang B, Miller M, Dieter MZ, Lorenz JN, Shertzer HG, Nebert DW, Puga A (2001) Dioxin exposure is an environmental risk factor for ischemic heart disease. Cardiovasc Toxicol 1:285–298
De Keulenaer GW, Alexander RW, Ushio-Fukai M, Ishizaka N, Griendling KK (1998) Tumour necrosis factor alpha activates a p22phox-based NADH oxidase in vascular smooth muscle. Biochem J 329:653–657
Dominguez-Rodriguez A, Abreu-Gonzalez P, Kaski JC (2009) Disruption of normal circadian rhythms and cardiovascular events. Heart Metab 44:11–15
Fichtlscherer S, Rosenberger G, Walter DH, Breuer S, Dimmeler S, Zeiher AM (2000) Elevated C-reactive protein levels and impaired endothelial vasoreactivity in patients with coronary artery disease. Circ 102:1000–1006
Gentner NJ, Weber LP (2010) Using blood pressure telemetry to assess acute changes in arterial stiffness in rats after nitric oxide synthase inhibition or environmental tobacco smoke exposure. Can J Physiol Pharmacol 88:918–928
Gkaliagkousi E, Douma S (2009) The pathogenesis of arterial stiffness and its prognostic value in essential hypertension and cardiovascular diseases. Hippokratia 13:70–75
Gotze JP, Lindeskog P, Törnquist CSI (1994) Effects of induction and age-dependent enzyme expression on lung bioavailability, metabolism, and DNA binding of urban air particulate-absorbed benzo[a]pyrene, 2-nitrofluorene, and 3-amino-1, 4-dimethyl-5H-pyridol-(4,3)-indole. Environ Health Perspect 102(Suppl 4):147–156
Hardeland R, Coto-Montes A, Poeggeler B (2003) Circadian rhythms, oxidative stress, and antioxidative defense mechanisms. Chronobiol Int 20:921–962
Heid SE, Walker MK, Swanson HI (2001) Correlation of cardiotoxicity mediated by halogenated aromatic hydrocarbons to aryl hydrocarbon receptor activation. Toxicol Sci 61:187–196
Hennig B, Meerarani P, Slim R, Toborek M, Daugherty A, Silverstone AE, Robertson LW (2002) Proinflammatory properties of coplanar PCBs: in vitro and in vivo evidence. Toxicol Appl Pharmacol 181:174–183
Hingorani AD, Cross J, Kharbanda RK, Mullen MJ, Bhagat K, Taylor M, Donald AE, Palacios M, Griffin GE, Deanfield JE, MacAllister RJ, Vallance P (2000) Acute systemic inflammation impairs endothelium-dependent dilatation in humans. Circ 102:994–999
Ichihara S, Yamada Y, Gonzalez FJ, Nakajima T, Murohara T, Ichihara G (2009) Inhibition of ischemia-induced angiogenesis by benzo[a]pyrene in a manner dependent on the aryl hydrocarbon receptor. Biochem Biophys Res Commun 381:44–49
Jacobs DR, Adachi H, Mulder I, Kromhout D, Kromhout D, Menotti A, Nissinen A, Blackburn H (1999) Cigarette smoking and mortality risk: twenty-five year follow up of the Seven Countries Study. Arch Intern Med 159:733–740
Jerrard-Dunne P, Mahmud A, Feely J (2007) Circadian blood pressure variation: relationship between dipper status and measures of arterial stiffness. J Hypertens 25:1233–1239
Kallio K, Jokinen E, Hämäläinen M, Saarinen M, Volanen I, Kaitosaari T, Viikari J, Rönnemaa T, Simell O, Raitakari OT (2009) Decreased aortic elasticity in healthy 11-year-old children exposed to tobacco smoke. Pediatrics 123:e267–e273
Kang HK, Dalager NA, Needham LL, Patterson DG Jr, Lees PS, Yates K, Matanoski GM (2006) Health status of Army Chemical Corps Vietnam veterans who sprayed defoliant in Vietnam. Am J Ind Med 49:875–884
Kanzawa N, Kondo M, Okushima T, Yamaguchi M, Temmei Y, Honda M, Tsuchiya T (2004) Biochemical and molecular biological analysis of different responses to 2,3,7,8-tetrachlorodibenzo-p-dioxin in chick embryo heart and liver. Arch Biochem Biophys 427:58–67
Kaplan NM (2002) Kaplan’s clinical hypertension. In: Kaplan NM (ed) Lippincott Williams & Wilkins, Philadelphia, pp 56–135
Kellen JA, Anderson KM (1972) Hypertension in Sprague-Dawley rats after single or multiple challenge with DMBA. Res Commun Chem Pathol Pharmacol 3:123–128
Kim HS, Kwack SJ, Lee BM (2000) Lipid peroxidation, antioxidant enzymes, and benzo[a]pyrene-quinones in the blood of rats treated with benzo[a]pyrene. Chemico-Biol Interact 127:139–150
Kim JS, Lim HS, Cho SI, Cheong HK, Lim MK (2003) Impact of agent orange exposure among Korean Vietnam veterans. Indust Health 41:149–157
Knaapen AM, Curfs DM, Pachen DM, Gottschalk RW, de Winther MP, Daemen MJ, Van Schooten FJ (2007) The environmental carcinogen benzo[a]pyrene induces expression of monocyte-chemoattractant protein-1 in vascular tissue: a possible role in atherogenesis. Mutat Res 621:31–41
Kopf PG, Huwe JK, Walker MK (2008) Hypertension, cardiac hypertrophy, and impaired vascular relaxation induced by 2,3,7,8-tetrachlorodibenzo-p-dioxin are associated with increased superoxide. Cardiovasc Toxicol 8:181–193
Korashy HM, El-Kadi AO (2006) The role of aryl hydrocarbon receptor in the pathogenesis of cardiovascular diseases. Drug Metab Rev 38:411–450
Lecureur V, Ferrec EL, N’diaye M, Vee ML, Gardyn C, Gilot D, Fardel O (2005) ERK-dependent induction of TNFalpha expression by the environmental contaminant benzo(a)pyrene in primary human macrophages. FEBS Lett 579:1904–1910
Li P, Sur SH, Mistlberger RE, Morris M (1999) Circadian blood pressure and heart rate rhythms in mice. Am J Physiol 276:R500–R504
Li H, Srinivasan SR, Chen W, Xu JH, Li S, Berenson GS (2005) Vascular abnormalities in asymptomatic, healthy young adult smokers without other major cardiovascular risk factors: the Bogalusa Heart Study. Am J Hypertens 18:319–324
Liu LB, Hashi Y, Liu M, Wei Y, Lin JM (2007) Determination of particle-associated polycyclic aromatic hydrocarbons in urban air of Beijing by GC/MS. Analyt Sci 23:667–671
Lundbäck M, Mills NL, Lucking A, Barath S, Donaldson K, Newby DE, Sandström T, Blomberg A (2009) Experimental exposure to diesel exhaust increases arterial stiffness in man. Part Fibre Toxicol 13:6–7
McEniery CM, Qasem A, Schmitt M, Avolio AP, Cockcroft JR, Wilkinson IB (2003) Endothelin-1 regulates arterial pulse wave velocity in vivo. J Am Coll Cardiol 42:1975–1981
Miller K, Ramos K (2001) Impact of cellular metabolism on the biological effects of benzo[a]pyrene and related hydrocarbons. Drug Metab Rev 33:1–35
N’Diaye M, Le Ferrec E, Lagadic-Gossmann D, Corre S, Gilot D, Lecureur V, Monteiro P, Rauch C, Galibert MD, Fardel O (2006) Aryl hydrocarbon receptor- and calcium-dependent induction of the chemokine CCL1 by the environmental contaminant benzo[a]pyrene. J Biol Chem 281:19906–19915
Nogueira JB (2009) Air pollution and cardiovascular disease. Rev Port Cardiol 6:715–733
Oesterling E, Toborek M, Hennig B (2008) Benzo[a]pyrene induces intercellular adhesion molecule-1 through a caveolae and aryl hydrocarbon receptor mediated pathway. Toxicol Appl Pharmacol 232:309–316
Pauletto P, Rattazzi M (2006) Inflammation and hypertension: the search for a link. Nephrol Dial Transplant 21:850–853
Penn A, Snyder C (1988) Arteriosclerotic plaque development is ‘promoted’ by polynuclear aromatic hydrocarbons. Carcinogenesis 9:2185–2189
Pesatori AC, Consonni D, Bachetti S, Zocchetti C, Bonzini M, accarelli A et al (2003) Short- and long-term morbidity and mortality in the population exposed to dioxin after the “Seveso accident”. Indust Health 41:127–138
Pickering TG, Kario K (2001) Nocturnal non-dipping: what does it augur? Curr Opin Nephrol Hypertens 10:611–616
Podechard N, Lecureur V, Le Ferrec E, Guenon I, Sparfel L, Gilot D, Gordon JR, Lagente V, Fardel O (2008) Interleukin-8 induction by the environmental contaminant benzo(a)pyrene is aryl hydrocarbon receptor-dependent and leads to lung inflammation. Toxicol Lett 177:130–137
Pope CA, Burnett RT, Thurston GD, Thun MJ, Calle EE, Krewski D, Godleski JJ (2004) Cardiovascular mortality and long-term exposure to particulate air pollution: epidemiological evidence of general pathophysiological pathways of disease. Circ 109:71–77
Rahman MM, Laher I (2007) Structural and functional alteration of blood vessels caused by cigarette smoking: an overview of molecular mechanisms. Curr Vasc Pharmacol 5:276–292
Ramadass P, Meerarani P, Toborek M, Robertson LW, Hennig B (2003) Dietary flavonoids modulate PCB-induced oxidative stress, CYP1A1 induction, and AhR-DNA binding activity in vascular endothelial cells. Toxicol Sci 76:212–219
Rubanyi GM (1993) The role of endothelium in cardiovascular homeostasis and diseases. J Cardiovasc Pharmacol 22:S1–S14
Savoia C, Schiffrin EL (2006) Inflammation in hypertension. Curr Opin Nephrol Hypertens 15:152–158
Schulz E, Anter E, Keaney JF Jr (2004) Oxidative stress, antioxidants, and endothelial function. Curr Med Chem 11:1093–1104
Taddei S, Virdis A, Ghiadoni L, Salvetti G, Salvetti A (2000) Endothelial dysfunction in hypertension. J Nephrol 13:205–210
Thirman MJ, Albrecht JH, Krueger MA, Erickson RR, Cherwitz DL, Park SS, Gelboin HV, Holtzman JL (1994) Induction of cytochrome CYPIA1 and formation of toxic metabolites of benzo[a]pyrene by rat aorta: a possible role in atherogenesis. Proc Natl Acad Sci USA 91:5397–5401
Tsioufis C, Syrseloudis D, Dimitriadis K, Thomopoulos C, Tsiachris D, Pavlidis P, Selima M, Kallikazaros I, Stefanadis C (2008) Disturbed circadian blood pressure rhythm and C-reactive protein in essential hypertension. J Hum Hypertens 22:501–508
Verma S, Wang CH, Li SH, Dumont AS, Fedak PW, Badiwala MV, Dhillon B, Weisel RD, Li RK, Mickle DA, Stewart DJ (2002) A self-fulfilling prophecy: C-reactive protein attenuates nitric oxide production and inhibits angiogenesis. Circ 106:913–919
Weber LP (2004) Acute ex vivo effects of dimethylbenz[a]anthracene and heat shock on rat tail artery. Cardiovasc Toxicol 4:355–362
Weber LP, Diamond SL, Bandiera SM, Janz DM (2002) Expression of HSP70 and CYP1A protein in ovary and liver of juvenile rainbow trout exposed to beta-naphthoflavone. Comp Biochem Physiol C Toxicol Pharmacol 131:387–394
Wilkinson IB, MacCallum H, Cockcroft JR, Webb DJ (2002) Inhibition of basal nitric oxide synthesis increases aortic augmentation index and pulse wave velocity in vivo. Br J Clin Pharmacol 53:189–192
Witte K, Schnecko A, Zuther P, Lemmer B (1995) Contribution of the nitric oxide-guanylyl cyclase system to circadian regulation of blood pressure in normotensive Wistar-Kyoto rats. Cardiovasc Res 30:682–688
Xu CX, Krager SL, Liao DF, Tischkau SL (2010) Disruption of CLOCK-BMAL1 transcriptional activity is responsible for aryl hydrocarbon receptor-mediated regulation of Period1 gene. Toxciol Sci 115:98–108
Yang H, Zhou L, Wang Z, Roberts LJ 2nd, Lin X, Zhao Y, Guo Z (2009) Overexpression of antioxidant enzymes in ApoE-deficient mice suppresses benzo(a)pyrene-accelerated atherosclerosis. Atherosclerosis 207:51–58
Zhang N, Agbor LN, Scott JA, Zalobowski T, Elased KM, Trujillo A, Skelton Duke M, Wolf V, Walsh MT, Born JL, Felton LA, Wang J, Wang W, Kanagy NL, Walker MK (2010) An activated renin-angiotensin system maintains normal blood pressure in aryl hydrocarbon receptor heterozygous mice but not in null mice. Biochem Pharmacol 80:197–204
Acknowledgments
The authors would like to thank Saskatchewan Health Research Foundation for providing funds for this research. Thanks also to the Natural Sciences and Engineering Research Council for scholarship support for N. Gentner (PGS-M) and an equipment grant for the telemetry system (NSERC RTI).
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Gentner, N.J., Weber, L.P. Intranasal benzo[a]pyrene alters circadian blood pressure patterns and causes lung inflammation in rats. Arch Toxicol 85, 337–346 (2011). https://doi.org/10.1007/s00204-010-0589-6
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DOI: https://doi.org/10.1007/s00204-010-0589-6