mitigating hepatitis b (hbv) infections - chinese hospital · mitigating hepatitis b (hbv)...
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Mitigating Hepatitis B (HBV) Infections: Template for Eradicating the World’s Second Deadliest Cancer
Moon S. Chen, Jr., Ph.D., M.P.H.
Professor, Division of Hematology and Oncology, UC Davis School of Medicine
Associate Director, Cancer Control/Cancer Health Disparities
UC Davis Comprehensive Cancer Center
Sacramento, CA
18th Conference on Healthcare of the Chinese in North America
October 8, 2016
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ACKNOWLEDGMENTS
The views expressed are those of the presenter and do
not necessarily represent the views of the NIH. However, I
am grateful for the support provided through the NCI to
AANCART (U54 CA153499) and the opportunity to be
part of the Cancer Prevention Symposium
Slides created by: Julie Dang, MPH, CHES
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Presentation objectives:
1. Review the epidemiological significance of chronic Hepatitis B
(HBV) infections for foreign-born Asian Americans and its
etiological role in hepatocellular carcinoma. Why care?
2. Highlight research, policies, and practices that can be
leveraged in community and clinical settings to mitigate HBV-
linked hepatocellular carcinoma. What can be done?
3. Discuss the potential of HBV prevention and control as being
the next “smallpox”, i.e., the next disease that could be
eliminated/eradicated. What is the take-away?
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Significance of chronic HBV for foreign-born and
its etiological role in hepatocellular carcinoma
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Liver cancer is now the world’s second
deadliest cancer.
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Globally, HBV is the primary cause of cancer after tobacco use.
“Following tobacco use,
infections as a group may
be the most important
preventable cause of
cancer in humans.”
Kuper, Adami, Trichopoulos, 2000
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Global
Population,
7.4 billion
Infected in
their lifetime,
2 billion
Chronically
infected,
400 million
Global Magnitude of HBV
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Asian Americans with Chronic HBV
Asian Americans 6%
US DEMOGRAPHICS
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Percent Change: 2000 to 2010
9.7%5.7%
12.3%
18.4%
43.3%
35.4%
24.4%
32.0%
To
tal
po
pu
lati
on
Wh
ite
Bla
ck
AIA
N
Asia
n
NH
PI
SO
R
Tw
o o
rM
ore
Race
s
Source: Census 2000 and 2010 Census
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HBsAg Prevalence
8% - High
2-7% - Intermediate
< 2% - Low
Significance
Liver cancer due to hepatitis B viral infection is a major cancer burden for people of color.
Lands of Origin:
• Southeast
Asia (Hmong)
• Vietnam
• China
• Korea
Apr 14
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9 March 2016, Cancer
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Prostate
-4.0
Colorectum
-3.0
Lung and Bronchus
-2.4
All Malignant
Cancers
-1.4
Pancreas
1.2
Melanoma of Skin
2.0
Liver & intrahepatic
duct 3.7
Thyroid
5.3
-6 -4 -2 0 2 4 6Average Annual Percent Change
Trends in Cancer Incidence, 1992 to 2012, Males
USA
Siegel R, Miller KD, Jemal A. Cancer Statistics 2016. CA Cancer J Clin 2016; 66: 7-30
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Colorectum
-2.8
Lung and Bronchus
-1.1
Female Breast
0.0
All Malignant
Cancers
0.0
Melanoma of Skin
0.9
Pancreas
1.1
Uterine Corpus
1.5
Liver and
Intrahepatic Bile
Duct
3.0
Thyroid
5.2
-4 -2 0 2 4 6
Average Annual Percent Change
Trends in Cancer Incidence, 1992 to 2012, Females
USA
Siegel R, Miller KD, Jemal A. Cancer Statistics 2016. CA Cancer J Clin 2016; 66: 7-30
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HBV HCV
Similarities• Both cause asymptomatic chronic viral infections
• Both are IARC classified carcinogens
• Both require specific serological detection
• Both etiologically related to liver cancer
Differences-Structure
-Prevalence
-Risk
--Vaccine
• Circular DNA genome
• 2.2 million Americans
• >50% Asian Americans
• Born in > 2% HBV endemic
areas
• Vaccination possible
• ssRNA genome
• 3.5 million Americans
• >75% baby boomers
• 1945-65 birth cohort
• Currently no vaccination
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Trends in Cancer Mortality, 1992 to 2012, Males
USA
Siegel R, Miller KD, Jemal A. Cancer Statistics 2016. CA Cancer J Clin 2016; 66: 7-30
Prostate
-3.6
Colorectum
-2.9
Lung and
Bronchus
-2.7
All Malignant
Cancers
-1.8
Melanoma of Skin
0.3
Pancreas
0.3
Thyroid
1.5
Liver and
Intrahepatic Bile
Duct
2.8
-4 -3 -2 -1 0 1 2 3 4
Average Change
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7.6
12.8
12.9
13.9
14.5
0 2 4 6 8 10 12 14 16
Non-Hispanic White
Non-Hispanic Black
Hispanic
American Indian/Alaska Native
Asian/Pacific Islander
Liver & Intrahepatic bile duct cancer mortality
rates for males, USA, 2008-2012 per 100,000
Siegel RL et al. Cancer Statistics, 2016; CA Cancer J Cln 2016; 66:7-30
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Trends in Cancer Mortality, 1992 to 2012, Females
USA
Siegel R, Miller KD, Jemal A. Cancer Statistics 2016. CA Cancer J Clin 2016; 66: 7-30
Colorectum
-2.9
Female Breast
-1.9
All Malignant
Cancers
-1.4
Lung and Bronchus
-1.4
Melanoma of Skin
-0.5
Thyroid
-0.5
Pancreas
0.4
Uterine Corpus
1.1
Liver and
Intrahepatic Bile
Duct
2.1
-4 -3 -2 -1 0 1 2 3Average Annual Percent Change
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3.1
4.4
5.6
6.1
6.3
0 1 2 3 4 5 6 7
Non-Hispanic White
Non-Hispanic Black
Hispanic
Asian/Pacific Islander
American Indian/Alaska Native
Liver & Intrahepatic bile duct cancer mortality
rates for females, USA, 2008-2012 per 100,000
Siegel RL et al. Cancer Statistics, 2016; CA Cancer J Cln 2016; 66:7-30
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Asian American Cancer Mortality Trends Reported By Race/ Ethnicity
Table 1. Top 5 sites of cancer-related mortality, ranked as a proportion of all cancer deaths, by race/ethnicity
(2003–2011)
Thompson, C. A., Gomez, S. L., Hastings, K. G., Kapphahn, K., Yu, P., Shariff-Marco, S., … Palaniappan, L. P. (2016). The Burden of Cancer in Asian Americans: A
Report of National Mortality Trends by Asian Ethnicity. Cancer Epidemiology, Biomarkers & Prevention: A Publication of the American Association for Cancer
Research, Cosponsored by the American Society of Preventive Oncology, 25(10), 1371–1382. https://doi.org/10.1158/1055-9965.EPI-16-0167
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Is chronic hepatitis B being undertreated?
Journal of Viral Hepatitis
Volume 18, Issue 6, pages 377-383, 8 DEC 2010 DOI: 10.1111/j.1365-2893.2010.01401.x
http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2893.2010.01401.x/full#f1
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54.4% 31.1%14.5%
HBV
Diabetes, Obesity,
Aflatoxins, Metabolic Syndrome,
Other??
HCV
Hepatocellular
Carcinoma
De Flora, S., & La Maestra, S. (2015). Epidemiology of cancers of infectious origin and prevention strategies. Journal
of preventive medicine and hygiene, 56(1), 15-20.
85.5%
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Impact & limitations of community &
clinically-based interventions
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Community-Based Interventions to
Promote Hepatitis B Testing
Liver Cancer Control for Asian AmericansNCI P01CA109091-04A1
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Lay Health Worker Visiting Home
Conducting Survey
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Impact of Lay Health Workers
6-year randomized controlled trial (2006-
2011)
LHW intervention
HBV vs general nutrition
260 Hmong adults through in-home
education and patient navigation
Chen, MS, et al. Cancer Epidemiol Biomarkers Prev 2013;22:782-91.
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Increasing Screening in the Hmong
Community by Lay Health Workers
0
5
10
15
20
25
30
HBV Testing HBV
Knowledge
Pe
rce
nta
ge
HBV Nutrition
P = 0.01
P = 0.0003
LHW had a significant
impact on HBV testing
but rates remained low
90% reported having
medical insurance
80% reported having a
regular physician
Chen MS, et al. Cancer Epidemiol Biomarkers Prev.2013 22:782-91.
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Using EMR to Increase HBV Testing
76 PCP randomized during 175
outpatient visits
Intervention (n = 88) Control (n = 87)
HBsAg Ordered 36 (40.9%) 1 (1.1%)
HBsAg Tested 30 (34.1%) 0
HBsAg POS 4 (4.5%) 0
Hsu L, et al. Dig Dis Sc. 2013;58:807-14
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Thousand Asian American Study (TAAS)
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Sacramento Collaborative to Advance Testing &
Care of Hepatitis B (SCrATCH B)
• Health System “Inreach”
*Identification of “untested”
*Recruitment to testing
*Identification of HBsAg positive patients
*Case management of HBsAg positive patients
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Mitigating Liver Cancer Health Disparities Among
Asian Americans
Funding Publications Collaborations Shared Resources
U54 CA153499 PCD, 2012 UCSF, UCLA, University of Hawaii, Biostatistics
P01 CA1090901 DDS, 2013 Hmong Women’s Heritage Association Biorepository
R21 CA179722 CEBP, 2013, 2014, 2015 Office of Clinical ResearchU54 MD
006970 JCG, 2014
CDC PS0039441 CA: A CA J Clin, 2016
U51 PS004633
UC Davis Team
Thao Moua Lo
Community: Statistically significant impact by bilingual/bicultural lay health worker intervention to increase HBV testing
Clinical: EMR-based messaging significantly increases HBV screening by primary care providers
Genomics: Only NCI-funded R21 to examine biologic determinants of differential liver cancer survival rates among Asian Americans
Back to the Community: Completing initial 1000 Asian American Study for HBV screening and funded to screen 2000 more Asian Americans and link them to care
Chen Stewart Tong Bowlus Dang
Increasing Hepatitis B (HBV) testing to reduce liver cancer risk
NGS-based identification of an HCC-specific blood genomic signature and its association with specific
immune inflammatory cell subsets
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HBV-linked HCC as the next
“smallpox”
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Propose:
December 1979
WHO Announces Global Eradication of
Smallpox!
14
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Parallels: Comparing Smallpoxwith HBV
Reservoir: only in humans
Etiology: both viral
Transmission: communicable
Prevention: both vaccine-preventable
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Major CDC Initiatives to prevent and manage Hepatitis B
1991: Hepatitis B virus: A Comprehensive Strategy for Eliminating
Transmission in the U.S. through universal childhood vaccination
2005-6: Comprehensive immunization strategy to eliminate
hepatitis B in the United States.
2008: Recommendations for the Identification and Public Health
management of persons with chronic Hepatitis B virus infections
2011: Use of Hepatitis B vaccination for adults with diabetes
mellitus
2015: Action Plan for the Prevention, Care, and Treatment of Viral
Hepatitis
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Preventing perinatal transmission
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Evidence for the Effectiveness of Universal HBV Vaccination
on HBV Infection and HCC in Taiwanese Children
Incidence of
HCC
0.7
0.57
0.36
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
1981-86 1988-90 1990-94
Pe
r 1
00
,00
0 /
yr
Source: Beasley RP, et al., Lancet 1981 Lok ASF, Gastroenterology 2004
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Presentation objectives:
1. Review the epidemiological significance of chronic Hepatitis B
(HBV) infections for foreign-born Asian Americans and its
etiological role in hepatocellular carcinoma. Why care?
2. Highlight research, policies, and practices that can be
leveraged in community and clinical settings to mitigate HBV-
linked hepatocellular carcinoma. What can be done?
3. Discuss the potential of HBV prevention and control as being
the next “smallpox”, i.e., the next disease that could be
eliminated/eradicated. What is the take-away?
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Apr 29 Draft as of Apr 14
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“Longest journey begins with a single step.”