Hasan Bayram, MD, PhD. Department of Chest Diseases, School of Medicine, University of Gaziantep
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Transcript of Hasan Bayram, MD, PhD. Department of Chest Diseases, School of Medicine, University of Gaziantep
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From Bench to Bedside; What Should a Physician Know About Air Pollution
and How to Help the Patient
Hasan Bayram, MD, PhD.Department of Chest Diseases, School of
Medicine, University of GaziantepE-posta: [email protected]
TTS 10th Annual Congress, Antalya, 25-29 April 2007
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Contents• Air pollution; definition• Effects on health
– Epidemiological studies– In vivo studies– In vitro data
• Intervention and effects• Suggestions
– Informing patients; authorities, press, physician– Medication
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What is Air Pollution?
• Presence of pollutants in the environment, where can have negative effects on nature and public health
• Outdoor air pollution; particulate matter (PM0.5, 2.5, 10), ozone, NOx, SO2
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Indoor Air Pollution
• NOx, Ozone, CO• PM, volatile organic compounds,• Poly aromatic hydrocarbons,• Formaldehyde,• Radon,• Biological agents,• Asbestos • Lead etc
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Contents• Air pollution; definition• Effects on health
– Epidemiological studies– In vivo studies– In vitro data
• Intervention and effects• Suggestions
– Informing patients; authorities, press, physician– Medication
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Effect of a 10g/m3 PM2.5 Increase on Cardiovascular and Respiratory Mortality in Metropolitan Cities in USA (1979-83, 99-00)
Pope CA,et al. Circulation 2004.
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Ozone - Mortality, APHEA-2 (23 Cities in Europe)
1h Ozone – Daily Mortality in Summer Period
Gryparis A et al, Am J Respir Crit Care Med, 2004
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Total Mortality
Resp Mortality
Association of Total and Respiratory Mortality withNO2 Over 6 days Over All Cities in Europe-APHEA-2.
Samoli E, et al. Eur Respir J 2006.
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Association of 10g/m3 increase in PM10-13/TSP With Emergency Room Visits Due to Asthma+COPD (>65y) -APHEA-2.
Atkinson RW, et al. Am J Respir Crit Care Med 2001.
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Effect of Air Pollution on Emergency Room Visits in Denizli City Centre
0
0,5
1
1,5
2
2,5
3
3,5
4
1 2 3 4 5 6 7 8 9 10 11 12
Admission Number
•Assoc. of Previous wk SO2 (r = 0,25) and PM (r=0,1) levels with emerg. visits
•Effect of 100g/m3/day SO2 (1.38;1.13- 1.63) and PM (1.14;1.03-1.25)
İncrease on risk of emergency room visits
Fişekçi et al Eur Respir J. (Suppl 30) 1999
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Berktaş M ve Bircan A,Tüberküloz ve Toraks Dergisi 2003
Monthly Emergency Room Visits Due to Asthma and Levels of SO2 and PM in Ankara
PM - AB
SO2 - AB
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0
20
40
60
80
100
120
140
160
Sep Oct Nov Dec Jan Feb Mar April May June July Aug
SO2
PM
Admis.
Hospital.
Bayram H, et al. Proc Am Thorac Soc 2006; 3: A389.
Association Between Respiratory Outpatients Visits and Hospitalisation and levels of SO2 (g/m3) and PM (g/m3) in
Diyarbakır 2004.
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Exercise and Asthma and Ozone- A Children Cohort
• 3535 Children (9-16yr) without asthma• 5 years follow up in Southern California• Newly diagnosed asthma in 265 children• In presence of ozone,
– The risk of asthma in children having exercise 2-3 times/day was 3.3 (1.9-5.8)
– No effects of exercise– Time spent outside has effect
McConnel R, et al. Lancet 2002
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Prevalence of All. Rhinitis Symptoms in High School Students in Bayrampaşa and Beykoz
• N=386
• Bayrampaşa; All Rinitis= 22.8 %
• Beykoz; 6%,
• The risk of living in Bayrampaşa= OR:4.6 (2.3-9.0)
Keleş N, et al. Am J Rhinol, 1999.
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FEV1 Growth in Girls/Boys Living in S Californiaand Mean NO2 Levels in 1993-2001
Gauderman WJ, et al. N Engl J Med 2004
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Air Pollution and Life Quality in Asthmatics in Gaziantep
• Air pollution • Use of bronchodilators in moderate
persistent asthma • Night symptoms
Bozkurt Aİ, TTS 2. Congress Abstract Book, 1998
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Epidemiological Data-Summary
• Mortality: Heart, lung and others
• Hospital visits: Asthma, COPD, cardiac diseases
• Increase in prevalence of allergic rhinitis, asthma, lung cancer, COPD,
• Effect on lung growth in children
• Effects on medication
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Contents• Air pollution; definition• Effects on health
– Epidemiological studies
– In vivo data– In vitro data
• Intervention and effects• Suggestions
– Informing patients; authorities, press, physician– Medication
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A human exposure hood developed for aerosol exposureKarolinska University Hospital, Stockholm (Liden et al, 1998)
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Air Pollutants – Clinical Effects
• Irritation in mouth and nose,
• Dyspnoea, wheezing, chest tightness,
• Decrease in lung function tests (FEV1, FVC, FEF25-75)
• Increase in airway hyperresponsivenessBrunekreef B, Holgate ST. Lancet 2002; 360: 1233-42.
Peden DB. Allergy 1997; 52 (suppl 38): 37-44.
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Ozone – Human Exposure
• Airway permeability; LDH, total protein, albumine
• BAL;– PMN leukocytes ↑– IL-6, IL-8, GM-CSF and fibronectin ↑
• Asthmatics; increase in eosinophils and MPO Scannell C, et al.Am J Respir Crit Care 1996; 154: 24-9.Balmes JR, et al. Res Rep Health Eff Inst 1997; 78:1-37.
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Ozone – Bronchial Epithelial GM-CSF Expression in Mild Asthmatics
Hava 0.2ppm O3 (2h)
Bosson J, et al. Clin Exp Allergy 2003;33:777-82.
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Nitrogen Doxide (NO2) Exposure
• Healthy subjects; Increase of neutrophils, IL-6, IL-8, and decreases in mucociliary cleareanceDevlin RB,et al. Inhal Toxicol 1999; 11:89-109.
• Asthmatics; Increases in Thromboxane B2 and prostaglandin D2 in BALJörres R, et al. Eur Respir J 1995; 8: 416-24.
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Devalia JL, et al. Lancet 1994; 344: 1668-1671.
Effects of NO2 and SO2 on Airway Response of Asthmatics to Allergens
1010
66
55
44
33
22
11
Allergen (CBU x 103)
Air NO2 SO2 NO2 +SO2
p<0.05
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Diesel Exhaust Exposure (PM10=108g/m3- 2h) – Normals
• Bronchial lavage;
– Neutrophil,
– Lymphocyte,
– IL-8
• Bronchial biopsy;
– IL-8 mRNA,
– p selectine,
– VICAM-1
Stenfors N, et al. Eur Respir J 2004;23:82-6
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Effect of Nasal DEP (0.3mg) on Allergen Induced IgE
Diaz-Sanchez D. Allergy 1997; 52 (suppl 38): 52-56.
0
40
80
120
160
Day 0 Day 1 Day 4 Day 8 Day 8
allergen + DEP
allergen
IgE (U/ml)
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CH Technologies(USA) Inc. http://www.toxics.com/expose/expose.html
Single Animal Exposure Units for Rodents
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Effect of Diesel Exhaust (30-1000g/m3
PM, 7 days) on RSV Infection in Mice
Harrod KS, et al. Am J Respir Cell Mol Biol 2003;28:451-63.
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Summary: In Vivo Laboratory Studies
• Bronchospasm, airway reactivity and related clinical symptoms
• Airway inflammation
• Enhances effects of allergens
• Potentiates effects of each others
• Tendency to viral airway disease (animal studies)
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Contents• Air pollution; definition• Effects on health
– Epidemiological studies– In vivo studies
– In vitro data• Intervention and effects• Suggestions
– Informing patients; authorities, press, physician– Medication
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Cells outgrow from tissue explant
(Hoffman Modulation Contrast Light Microscope, x300)
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Cell Cultures (Humans, Animal)• Cell line
• Primary cell cultures
• Nasal, tracheal, bronchial, alveolar epithelial cells
• Smooth muscle cells
• Fibroblasts
• Alveolar macrophages
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t2 t6 t240
1
2
3
4
501050100
Time (hours)
Ozone (ppb)
**
** *
****
**
*
##
#
14C
-BSA
% in
med
ium
t2 t6 t240
1
2
3
4
5
Time (hours)
14C
-BSA
% in
med
ium
Ozone – BEC Culture Permeability of Asthmatics and Non-asthmatics
Non-asthmatics Asthmatics
Bayram H, et al. Clin Exp Allergy 2002.
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0
0,5
1
1,5
2
2,5
3
3,5
Air 10 50 100Concentration of Ozone
(ppb)
NS
Non-asthmaticsGM-CSFpg/ug cell protein
NS
NS
0
0,5
1
1,5
2
2,5
3
3,5
Air 10 50 100Concentration of Ozone
(ppb)
NS
p=0.035
p=0.015
AsthmaticsGM-CSFpg/ug cell protein
*
Bayram H, et al. J Allergy Clin Immunol 2001.
Effect of ozone on release of GM-CSF from BEC of non-asthmatics and asthmatics
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Bayram H, et al; J Allergy Clin Immunol 1999.
Effect of Loratadine on 400ppb NO2-induced release
of RANTES and sICAM-1 from HBEC
Air 400ppb NO2 0.25M 2.5M 25M Loratadine[M]+NO2
Air 400ppb NO2 0.25M 2.5M 25M Loratadine[M]+NO2
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Incubation of BEC with DEP
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Bayram H, et al. Am J Respir Cell Mol Biol 1998.
Effect of DEP on Ciliary Beat Frequencyof Bronchial Epithelial Cells
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Effect of DEP on Release of IL-8 from Bronchial Epithelial Cells of Non-asthmatics and Asthmatics After 24hrs
Non-asthmatics AsthmaticsBayram H, et al. J Allergy Clin Immunol 1998.
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Effect of DEP (10g/ml) onA549 cell proliferation
G0/1 S G2/M0
25
50
75
100Serum Free
DEP (10g/ml)
FCS (10%)***
***
*
**
*****
Cell cycle compartments
Per
cent
of
cells
Channels (FL2-H)0 50 100 150 200 250
Num
ber
020
040
060
080
010
00
Sync Wizard Model File: Data.002Date acquired: 06-Jun-03Date analyzed: 6-Jun-2003
G0G1: 75.81 % Mean: 53.79 CV: 4.94 %G2M: 10.98 % Mean: 97.36 G2/G1: 1.81S-Phase: 13.21 % Mean: 76.25 Compartment 1: 4.03 % Compartment 2: 4.70 % Compartment 3: 4.47 % Modeled Events: 8835RCS: 4.671
G0G1G2MS-Phase
SF
•NAC (10mM)•JNK inh. (33M)
Bayram H et al, Eur Respir J 2006
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LL(A-/P-) LR(A+/P-) UR(A+/P+) UL(A-/P+)0
10
20
30
40
70
100 **
*
FCS(10%)SF
DEP (10g/ml)
*
*
Kuadrantlar
Hüc
rele
rin %
'si
*P<0.05 and**P<0.005 vs SF
Effect of DEP (10g/ml) on A549cell apoptosis
SF
Bayram H et al, Eur Respir J 2006
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permeability
IL-8 RANTES GM-CSF ICAM-1
Adhesion molecule)ICAM-1VCAM-1
E-selectin EosinophilChemotaxis
SurvivalEndothelial cell
Allergen
Mast Cell
O3, NO2, DEPCBF
Apoptosis Prolif.
(Starvation)
•NAC•JNK inh.•NF-kB inh.
•Anti-infl agn
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Contents• Air pollution; definition• Effects on health
– Epidemiological studies– In vivo studies– In vitro data
• Intervention and effects• Suggestions
– Informing patients; authorities, press, physician– Medication
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The Death Rates in Dublin 6yrs Before and After Ban (1990) on Coal Sales
*Adjusted for temperature, humidity, resp epidemics and standard death rates
Clancy L et al, Lancet 2002
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Acute Asthma Attacks Before and During Atlanta 1996 Summer Olympics
* 21 June-18 July and 5 August -1 September 1996† 19 July - 4 August 1996.
Friedman MS et al. JAMA, 2001.
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Effect of Natural Gas Instillation on Symptoms of Rhinitis in High School Students in Istanbul
Rhinitis Symptoms: 62.5% (n=125)* 51% (n=102)OR : 1.6 (1.08-2.58)
*p<0.05
Keleş N, et al. Arch Environ Health 1999.
(Doğal gazdan sonra)(Doğal gazdan önce)
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Effects of Home Preventative Measures (allerg,smoke) on Asthmatic Symptoms of Children (n=937)
Morgan WJ, et al. New Eng J Med 2004
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Chapman RS, et al,BMJ 2005; 331: 1050-56
Effects of Improvement in Household Stoves on Risk of COPDin China (Xuanwei) (Retrospektive cohort, 1976-92)
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Contents• Air pollution; definition• Effects on health
– Epidemiological studies– In vivo studies– In vitro data
• Intervention and effects
• Suggestions– Informing patients; authorities, press, physician– Medication
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Legislative Measures
• 1930; Umumi Hıfzısıhha K, Gayrı Sıhhi M, regulation on environmental health
• 1961; Monitory of SO2 and smoke in Ankara
• 1983; Environmental protection law
• 1986; Turkish Law of Air Quality Protection
Ministry of Envronment and Forestry (www.cevreorman.gov.tr) and Health (www.rshm.gov.tr), Republic of Turkey.
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Emergency Measures; Alarming Levels*
**SO2 (g/m3) **PM (g/m3)
1. Step 700 400
2. Step 1000 600
3. Step 1500 800
4. Step 2000 1000
Ministry of Health, Turkey (www.rshm.gov.tr)
*Measures to be taken by local authorities**24h average
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What Can We Do for Our Patients?
• Measures to reduce indoor air pollution
• Ventilation at suitable time periods
• Stay indoor when level of pollution is high outside
• Close monitorisation for attacks when air pollution is high.
• Increase dose of medication if needed
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SUMMARY• Air pollution has negative effects on heart and lungs
• Shows these effects by directly influence airways (airway
narrowing etc)
• By increasing oxidative stress or altering other cellular
functions leading to– Inflammation and
– Changes in cell proliferation and death
• Measures reducing air pollution have positive impact on
health
• Patients should be more closely monitored in periods
when level of pollution is high.
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