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Obesity and Cancer Survivorship: Where are we in Providing Care?
Cynthia Thomson, PhD, RDMary Koithan, PhD, RN, CNS-BC
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Objectives
This webinar will help you:• Describe the relationship between obesity,
weight gain and cancer risk and survival. • Better understand the biological and
psychosocial influences contributing to obesity • Efforts for multidisciplinary cancer survivorship
care to reduce the burden of obesity in cancer survivors.
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2000
Obesity Trends* Among U.S. AdultsBRFSS, 1990, 2000, 2010
(*BMI 30, or about 30 lbs. overweight for 5’4” person)
2010
1990
No Data <10% 10%–14% 15%–19% 20%–24% 25%–29% ≥30%
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Factors Associated with Obesity
• Independent of prior cancer diagnosis:– Age– Race/ethnicity– SES– Food and activity environment– Stress and eating response*
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Stress and Obesity
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Obesity Defined: Is BMI Enough?Weight (pounds)
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Metabolic State Correlates with Body Shape
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Adiposity and Insulin Resistance
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Annual Reviews
Obesity and Chronic Inflammation
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Fat Cell-Adipocyte and InflammationLee et al, Curr Opin Clin Nutr Metab Care. 2010 13(4): 371-376
Adipocyte stromal cells have high angiogenic potential and as such may contribute to cancer progression
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Obesity-Associated Biomarkers of Cancer Risk and Recurrence
Biomarker Role
Insulin Growth-promotion/ cell division, anti-apoptotic
IGF-1 and IGF-BP-1 Increased cell migration, prolonged elevated insulin, potentiates growth factors
C-reactive protein (CRP) Inflammation, may correlate with estradiol
Interleukin 6 Inflammation, growth and differentiation of malignant cells
Tumor necrosis factor alpha Inflammation, associated with insulin resistance
Serum amyloid A (SAA) Low-grade chronic inflammation; assoc with reduced survival in breast cancer
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Pulmonary diseaseabnormal functionobstructive sleep apneahypoventilation syndrome
Nonalcoholic fatty liver diseasesteatosissteatohepatitiscirrhosis
Coronary heart disease Diabetes Dyslipidemia Hypertension
Gynecologic abnormalitiesabnormal mensesinfertilitypolycystic ovarian syndrome
Osteoarthritis
Gallbladder disease
Cancerbreast, uterus, cervixcolon, esophagus, pancreaskidney, prostate
Phlebitisvenous stasis
Gout
Medical Complications of ObesityIdiopathic intracranial hypertensionStroke
Cataracts
Severe pancreatitis
Slide source: www.obesityonline.org
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Psychological Effects of Obesity
• Eating dysregulation: Craving cycle• Increase in stress
– Body image– Mobility
• Depression• Fatigue• Overall effects on quality of life
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Obesity and Cancer
• Obesity is associated with risk for:– post-menopausal breast – endometrial/uterine– pancreatic– colorectal– gallbladder – esophageal
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Obesity and Cancer Survival
• In the survival setting associations are less consistent– Treatment efficacy; treatments employed;
Recalcitrant disease• Most studies in breast cancer• Weight gain during therapy in those with
normal BMI –greater risk?• Metabolic co-morbidities are highly relevant
Parekh, Chandran and Bandera, 2012
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Survival Varies by Race and Obesity
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Framework for the combined influence of race and obesity on cancer survivorship.
Schmitz K H et al. JNCI J Natl Cancer Inst 2013;105:1344-1354
© The Author 2013. Published by Oxford University Press. All rights reserved. For Permissions, please e-mail: [email protected].
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Cancer Therapies: Surgery, Radiation, Chemotherapy, Hormone suppression
Increased adiposity
Loss of lean mass
Inflammatory and/or abnormal metabolic
response
Fatigue, and/or
reduced mobility
Interventions• Diet
• Physical activity• Sleep hygiene
• Anti-inflammatory drugs• Weight control
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Evidence in Support of Theoretical Models
• Limited intervention studies; most in breast cancer survivors
• Survivors report change in diet; trials suggest that behaviors can be modified after diagnosis
• Few assessed cancer endpoints; most evaluate intermediate biomarkers of disease risk
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Low CHO versus Low Fat Weight Loss Diets
• 50 overweight breast cancer survivors on tamoxifen or aromatase inhibitors
• Randomized, 2-arm trial• Face-to-face counseling with a dietitian weekly
x 4 weeks, then monthly for 5 months• Baseline, 3 and 6 month measures of:• Anthropometrics, body composition• Metabolic indices• Inflammation (CRP, IL-6)
Thomson, et al. Nutr & Cancer, 2010
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Percent of Breast Cancer Survivors with Metabolic Syndrome Before and After Weight Loss
52%
28%
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Baseline 24 w eeks
Metabolic Syndrome Diagnosis by NCEP ATPIII Criteria (w / glucose >100mg/dl)
no
yes
Thomson CA, J Women’s Health, 2009
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Obesity-associated Co-Morbidities may Influence Cancer Survival
• Women’s Healthy Eating and Living Study3055 women treated for breast cancer
• CVD, hypertension not associated with breast cancer events or mortality after breast cancer
• Diabetes associated with a 2-fold greater risk for breast cancer event and 2.5-fold higher risk for mortality
• Combined co-morbidities: CVD, HTN, DM increased mortality risk 2-fold
• Recent analysis in 636 ovarian cancer survivors showed DM increased mortality 84%
WHEL Research Group; Breast Ca Res Treatment 2010; WHI ms #2080
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Weight Control Studies in the Survivor Population
African American Womens’ study –improved QOL
• Primary outcomes:• Chronic and late effects• Weight change• Improved function• Quality of Life• Reduced metabolic abnormalities
Lombardi study in African American Women: Sheppard and Adams-Campbell
http://www.youtube.com/watch?v=_l9xoqAUE-I&feature=player_embedded
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ENERGY Trial• Weight loss in breast cancer survivors (N=693)• Daily activity, eating behaviors• Outcome: breast cancer recurrence and disease-free survival• Pilot data from 220 women demonstrated ≥5% weight loss
decreased leptin, insulin, estrone, estradiol
Rock et al, Clin Breast Cancer, 2013; Rock et al., Contemp Clin Trials, 2013
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Summary: Interventions for Weight Control Post-Diagnosis
• No evidence of survival benefit demonstrated to date– Trials underway: ENERGY, LEAN, etc
• Weight loss diets will “correct” metabolic and inflammatory abnormalities– Trails with: RD counseling, Weight Watchers, Curves, etc– May reduce risk co-morbidities associated with poorer
prognosis• Diet-induced weight loss reduces lean mass and bone;
– Physical activity, including strength training, should be considered in weight loss plans
– Must address whole person
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Role of Healthcare Providers
• ACS Guidelines, 2011– Promote weight control– Plant-rich diet– Physical activity > 30 minutes daily– Limit alcohol– Avoid energy-dense foods; sweetened beverages
• Lifestyle modification counseling and support• Tailored to individual patient, prognosis and
time-course of diseaseRobien, Demark-Wahnefried and Rock, JAND, 2011
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The Anti-inflammatory/ MediterraneanDiet
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Limited Evidence, but Biological SupportLow Glycemic Diet
Low Glycemic Index• Lentils• Black beans• Cashews• Sweet potato• MacaroniModerate Glycemic Index• Brown rice• Quick oats• Bran muffin• Pineapple• Raisins• ApricotsHigh Glycemic Index• White Bread• Baked potato• Corn Flakes• Watermelon
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Exercise and Movement
• Yoga• Tai Chi• Walking
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Mind-body Stress Reduction
• Mindfulness• Meditation• Breathing
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Restorative Sleep
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Integrative Approaches to Weight Loss
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Lifestyle/Behavioral Change
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Maintenance
Pre-contemp
lation
Contemplation
Preparation
Action
5 Stages of Change
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1. Consciousness Raising2. Dramatic Relief3. Environmental Re-evaluation
4. Social Liberation5. Self Reevaluation
Experiential
10 Processes of Change
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6. Stimulus Control7. Helping Relationships8. Counter Conditioning
9. Reinforcement Management10. Self Liberation
Behavioral
10 Processes of Change
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Provision of Care
• Multidisciplinary – healthcare professionals and community-based providers
• Beyond cancer survivorship clinics• Move from cancer care centers to primary
care settings
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Resources: NCI TRECs
Translational Research Energetics and Cancer• Fred Hutchinson Cancer Research Center• Harvard: biological mechanisms linking obesity and cancer throughout the lifespan and at multiple levels,
and translating this knowledge into actionable behavioral interventions targeting children, minorities, and cancer survivors.
• University California, San Diego: mechanisms linking obesity with breast cancer risk and conducts studies investigating obesity and lifestyle factors related to insulin resistance and inflammation using mouse models, clinical trials, and wireless and networked technologies in the community.
• University of Pennsylvania: the association between energy balance and breast cancer recurrence and persistent adverse treatments effects and explores the impact of exercise and weight control interventions in cancer survivors through cost effectiveness analysis.
• Washington University in St. Louis: multilevel and multigenerational approaches to investigate mechanisms by which preconception diet, nutrition and built environment policies impact inactivity and how physical activity and energy balance influence body weight and carcinogenesis across the lifespan.
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Resources: Diet, Obesity and Cancer • Academy of Nutrition and Dietetics – Oncology Dietetics
Practice group: www.oncologynutrition.org• American Cancer Society Guide: www.cancer.org• American Institute for Cancer research: www. AICR.org• Center for Disease Control and Prevention http
://www.cdc.gov/cancer/survivorship/• Marian M and Roberts S. Clinical Nutrition for Oncology
Patients, Jones & Bartlett, 2010• The University of Arizona College of Nursing’s Community
Cancer Connections Projects @ www.linkin.nursing.arizona.edu
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Questions??????????