Using Genetic Clues to Personalize Nutrition Janet Zarowitz MS RD CDN NYSAND Annual Meeting amp Expo May 21 2016 Nutrigenomics The study of the effects of foods and food constituents on gene expression ID: 540422
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Slide1
Nutrigenomics:Using Genetic Clues to Personalize Nutrition
Janet Zarowitz, MS, RD, CDN
NYSAND Annual Meeting & Expo
May 21, 2016Slide2
Nutrigenomics!
The study of the effects of foods and food constituents on gene expressionSlide3
Nutrigenomics
Building Upon What We Already KnowDovetailing With Established Science
Well Accepted
Diet and lifestyle choices can significantly affect our healthPoor eating habits can prevent achieving genetic potential and optimal health
Certain nutrients needed to promote normal replication of DNA for normal growth and healing
Evolving Evidence
Specific foods and supplements can support
our own unique genetic
predispositionsSlide4
Family History
Family History
provides clues to
Potential
for health and disease, looking for genetic trends
Building Upon What We Already KnowSlide5
Family History
The same is true for Genetic Profile
NOT DESTINY
Potential and PredispositionSlide6
Role of Genetic Profile
In the Patient Care Process
Genetic profile “joins” the intake process, alongside:
…to help figure out the patient puzzle
Family History
Signs and Symptoms
Medical History/Diagnoses
Lab Values, Biomarkers
Medications, Supplements
Diet, Cooking, Eating Environment
Lifestyle, Exercise, Self Care
Social Network, SupportsSlide7
Genetic ProfileMapping a Person’s DNA
Individual’s genetic characteristics (DNA analysis)
can:Provide insight into
potential for developing certain diseasesOffer clues to root
causes of disease/symptomsHelp reduce
guesswork
in treating
suboptimal
healthSlide8
Gene Expression
Epigenetics, or how genes are expressed is where Nutrition gets into the game.Slide9
Nature Meets Nurture
Once nurture seemed clearly distinct from nature.
Now it appears that our diets, lifestyles & other environmental factors can change the expression of our genes.
Epigenetics
-
Where Genes Meet the EnvironmentSlide10
Epigenetics - Beyond The Gene
Environmental factors affect gene expression (without changing DNA)
Environmental factors
turn genes “on” or “off”
Food, nutritional deficiencies/excess, breast/bottle feeding, GI microbial mixExercise, lifestyle, stress, aging, diseases
Prenatal,
childbirth, early life experiences
Chemicals, toxins, radiation, pathogens, drugs
….. they all affect gene expression
…..
the genome adapts to environmental factorsSlide11
Intergenerational Transmission
From Macmillan Publishers Ltd: : Qiu, J. Nature, 2006, 441, 143, copyright (2006)Slide12
Are Nutrition Professionals Already Practicing Epigenetics?
Biochem Pharmacol. 2010 Dec 15;80(12):1771-92. doi: 10.1016/j.bcp.2010.06.036. Epub 2010 Jun 26.
Cancer chemoprevention by dietary polyphenols: promising role for epigenetics
.Link A1,
Balaguer F, Goel A.
Dietary Polyphenols and Cancer Prevention
Eat
Rainbow
of
Foods
More
Plant-based Foods
Tomatoes
Apples
Citrus
Tu
r
meric
Garlic
Cin
n
amon
Broccoli
Cashews
Grapes
TeaSlide13
Isolating Compounds & Epigenetics
Dietary Manipulation of Histone Structure and Function, Barbara Delage and Roderick H. Dashwood
Annu Rev Nutr. 2008; 28: 347–366.
Diet and Supplements
Dietary fiber
- gut bacteria ferment dietary
fiber
,
produce
butyrate, which mediates epigenetic process in
gut
associated immune system - GALT
Phytochemicals
-
gut bacteria metabolize
phytochemicals
into
products
that
have epigenetic effects
Minerals
- associated with changes in epigenetic mechanisms regulating gene
expressionSlide14
Epigenetics & Personalized Nutrition
Personalizing Nutrition
affect epigenetic mechanisms - methyl donors, phytochemicals, fatty acids, vitamins
modulate genes involved in inflammatory diseases
modulate genes encoding absorption, distribution, metabolism, & excretion proteins
“From inflammaging to healthy aging by dietary lifestyle choices:
is epigenetics the key to personalized nutrition?”
Clinical
Epigenetics, 2015 Mar: 7(1):33,
vel
Szic
,
Vidakovic
, and
Berghe
Slide15
How To Put This Into Practice, Today?
Epigenetic Nutrition Strategy
Using new genetic info, RDs can ….
design customized nutrition therapies and lifestyle changes for healing — above and beyond symptom management.Slide16
How I StartedTesting Options
Reference
integrativerd.orgSlide17
23andMe Process
Order at-home saliva kit through http://23andme.com
Mail-in NYS workaround
Results emailed within several weeksRaw data 1000’s genes vs. few
Upload data file to third party websites for interpretive genetic reports, e.g., MTHFRSupport.comSlide18
Reading Genetic Reports
Understanding SNPs/Gene VariationsSingle nucleotide polymorphisms - “snips”Most variations “typos” - switching one letter in gene’s sequence to another (switching
nucleotide)We all have SNPs
A person’s genome (and their SNPs) do not changeSlide19
SNPsWhat’s Their Relevance?
Some SNPs change the gene’s “instruction manual” - encoding a protein with altered shape, activity, stability and/or abundance
Only certain SNPs are associated with difference in molecular function significant enough to effect clinical
measurements or disease riskGenes that encode different enzymes (e.g., MTHFR) prone to common mutations or SNPs
Innovative view: “What if DNA mutations are not always the markers of disease, but rather — under the right set of circumstances — markers for resilience?” - Eric Schadt, PhD and Stephen Friend, MD, PhDSlide20
SNPs
Affecting the Body’s Ability to Do WorkSNPs reflect the ability of the body to do workSome SNPs reduce function, less often
enhance functionMore than half
population has SNPs that reduce activity of one or more enzymes by up to 70%Some SNPs directly affect nutrient assimilation
and nutritional requirementsEffects of these SNPs can be substantially mitigated with targeted nutritional
approach
- diet and supplementationSlide21
Homozygous | Heterozygous
for each gene pair,SNP may occur in none, one or both copies of geneon genetic reports “+” represents SNP
homozygous SNP “+/+” can have more significant health implications compared to milder heterogeneous genotype
-/-
-/+
+
/+
Homozygous “variant”
2 SNPs
Heterozygous “variant”
1 SNP
Homozygous “normal”
no SNPsSlide22
SNP ID
rsID Number
or SNP ID
identifies chromosomal locationsSlide23
Nutritionally Relevant Genes
Well ResearchedMTHFR C677T and A1298C
folate and methylation
COMT Val/Met 158 methylation, mood and estrogen metabolism
Slide24
What is Methylation?
Methylation is a biochemical reaction in which a methyl group (CH3) is attached to a molecule, converting it to a different molecule
Chemically SpeakingSlide25
What is Methylation?
Methylation has vital roles in:
epigenetics and gene regulation
(DNA methylation & histone acetylation)neurotransmission
amino acid metabolismDNA synthesis and repair
hormone detoxification
vitamin assimilation (including folate)
homocysteine clearance
cell membrane structure
Clinically SpeakingSlide26
Methylation Pathway SNPs
May Present Asloss of digestive integrity (rapid cell turnover), food intolerances
mood disorders, depression, anxiety, cognitive function deficits
neural tube defectsendocrine imbalance (estrogens), environmental toxin buildup (phase 2 liver)
cancer, e.g. colorectal, breast, lung (altered suppression of gene transcription)Slide27
Methylation Pathway SNPs
May Present Ascardiometabolic
syndrome (with homocysteine buildup)chronic inflammatory diseases (less glutathione production)
impaired thyroid function (less T4 to active T3 conversion)
impaired fertility (male and female)fatigue (reduced CoQ10 and carnitine production)general poor overall health and immunitySlide28
So That’s Why We Had to Take Biochemistry!
Methylation PathwaysSlide29
Cycles of Methylation Pathway
fumarate
Krebs
cycle
aspartate
Plus Krebs cycle
Activates
f
olate
N
eurotransmitters
Nitrogen removal
SAMe
,
G
luathione
generation; phospholipidsSlide30
Genes Code for Enzymes
Genes
Gene LocationsSlide31
Enzymes Need Cofactors
Cofactors
Genes
Like
Mg
, Zn,
Riboflavin
, B12, B6Slide32
Nutrients Can Bypass SNPs
Nutrient bypass
support
Genes
Cofactors
Nutrient bypass support includes 5-MTHF (folate), B12,
methionine, SAMe,
choline, DHA, phosphatidyl serineSlide33
MTHFR GeneC677T & A1298C SNPs
Key Regulators of MethylationMethylene Tetrahydrofolate Reductase
Gene function:
encodes Methylene Tetrahydrofolate Reductase enzyme
Enzyme function
:
converts
folic
acid
and
5,10-methylene
THF
to
active
form of
folate
(5-MTHF)Slide34
MTHFR GeneC677T & A1298C SNPs
Methylene Tetrahydrofolate ReductasePotential impact
of reduced enzyme function of these SNPs:
Reduced conversion of Folate to ACTIVE form, needed for methylation and as coenzyme or cosubstrate in synthesis of DNA, RNA & amino acids
C677T - associated with cardiovascular problems
reduced conversion of homocysteine to methionine;
also
associated with increased male infertility and sperm DNA alteration
A1298C - associated with neurological/cognitive problems
reduced production of tetrahydrobiopterin (
BH4)
,
integral
cofactor in nitric oxide & neurotransmitter synthesis; does
not
affect homocysteine levelsSlide35
Making the Assessment
Will Nutrition Strategy Help?
YOUR DNA IS NOT YOUR DESTINY
…
it’s one factorSlide36
Making the Assessment
Look at Clues Holistically Treat the Person, Not the SNP
Medical History/Diagnoses
Signs and Symptoms
BiomarkersDietary IntakeSpecial Requirements
Interfering Meds, Supplements
Environmental Toxins
Cigarette Smoking, Alcohol
Stressors - Emotional, Physical
AND Genetic Profile - SNPs Slide37
Symptom/Diagnosis Clues
Of Undermethylation
Digestive issues, bloating, IBS, constipation/diarrhea, poor nutrient absorption, food intolerances
Excessive histamine response, itchiness, stomach pain, histamine intolerance
Cardiometabolic syndromeWeight changes, impaired thyroid
Brain fog, sleep difficulties, neurological problems, anxiety, mood disorders, autism
Getting sick often, lowered immunity, cancer
Peripheral neuropathy, dementia
Fatigue, joint pain, inflammationSlide38
Biomarker Clues
Of Undermethylation
-Elevated Homocysteine
-Low RBC Folate Levels-High FIGLU in Urine
-Elevated
Methylmalonic
Acid
-Elevated Homocysteine
-Anti-parietal/Anti-intrinsic Factor Antibodies
Low Folate
Low B12
-Urinary estrogen metabolites panel - high hydroxyestrones, low methoxyestrones and ratios
-Elevated Histamine
-Anemias - megaloblastic or macrocytic
May
Indicate Methylation IssuesSlide39
Nutrient Requirement Clues
Drugs Interfere with Folate – Absorption/Availability
-
antacids, H2 blockers, proton pump inhibitors
-bile acid sequestrants/cholesterol-binding drugs-NSAIDS
-anti-seizure drugs
*
-sulfa drugs - antibiotics
-
estrogen drugs - birth control, menopause meds
-methotrexate
*
- chemotherapy
*
folate
may negate effect of
dru
g; work with MD
Ref: Dr. Suzy Cohen, R Ph,
www.suzycohen.comSlide40
Nutrient Requirement Clues
Drugs Interfere with B12 – Absorption/Availability
-metformin
-colchicine (gout)
-antacids, H2 blockers, proton pump inhibitors-bile acid sequestrants/cholesterol-binding drugs
-
anti-seizure
drugs
-sulfa drugs - antibiotics
-
estrogen drugs - birth control, menopause meds
-
methotrexate
- chemotherapy
Ref: Dr. Suzy Cohen, R Ph,
www.suzycohen.comSlide41
Environmental Stressor Clues
Diet-
Low in leafy green vegetables and other folate-rich foods-High in processed foods, many enriched with competing folic acid
-High alcohol intakeEnvironmental toxins -Cigarette smoking
-Working or living near/with chemicals including householdEmotional or physical stress -Injury, surgery, infection, pregnancy, aging
M
ay Not Satisfy M
ethylation Requirements
Slide42
Genetic Clues - SNPs
nutrition recommendation
for each genetic SNP
-/+ one SNP
+/+ two SNPs
-/- no SNPs
Clues suggest possibilitySlide43
How Does it Add Up?
Woman trying to get pregnant, long-time on oral contraceptives *Type 2 Diabetic on metformin, vegetarian
Patient with IBS, abdominal bloating, food intolerances/limited diet, elevated histaminePostmenopausal woman on
PPIs, borderline osteopenia*Testing for Methylation SNPs - all young women prior to pregnancy
Clues Related to Possible Undermethylation+ Methylation SNPs = Case for Nutrition InterventionSlide44
How Does it Add Up?
Family hx cardiovascular disease, blood clots, elevated homocysteine, low folatePatient on cholesterol-binding
med, brain fog, sleep difficulties,
elevated methylmalonic acidTeenager with anxiety, mood disorder, diet high in processed foodsPremenopausal woman, family
hx breast cancer, imbalanced urinary estrogen metabolites (high hydroxyestrones, low methoxyestrones)
Clues Related to Possible Undermethylation
+ Methylation SNPs = Case for Nutrition InterventionSlide45
Nutrition Intervention for MTHFR SNPs
Integrating Diet and SupplementsSlide46
Targeted Nutrition Support
for MTHFR C677T and A1298C SNPsSTRATEGY: BYPASS GENE BY ADDING ACTIVATED NUTRIENTS
Supplement - First support pathways with minerals and B vitamins
except folate and B12Then, bypass MTHFR gene — greater need for folate, active form
Diet - More folate-rich foods: liver, spinach, kale, other green leafy vegetables, asparagus, cauliflower, Brussels sprouts, broccoli, beets, lentils, legumes, papaya
Supplement
– Transition to s
upplement
with
5-MTHF/
Metafolin
,
active
,
universally
metabolized folate
Increase vitamins and
cofactors
needed by folate
Diet
- More
foods
rich in B12, riboflavin, B6, Mg, Zn, Cysteine
Supplement
-
M
ultivitamin
containing vitamins and cofactorsSlide47
Targeted Nutrition Support
for MTHFR C677T and A1298C SNPsLimit synthetic folic acid which
may compete with active form of folate
Diet - Limit processed foods enriched with folic acid
1998 - folic acid fortification required in grain products - breads, cereals, flours, corn meals, pastas, rice, etc.Supplement - Do not take folic acid supplements or multivitamins with it
(most have it
)
Diet
- More foods good methyl donors, e.g. beets, quinoa, lambSlide48
Using Supplements
Why Diet May Not Be EnoughInability to convert vitamin form in food to bioactive form body requires; active form of nutrient can bypass affected geneAssimilation is compromised requiring greater amount of specific nutrients than the “average” person
Nutritional deficiencies of folate, B12 and zinc may alter epigenetic methylation and reduce genomic stabilitySlide49
Using Supplements
Best Practices Addressing MethylationBegin with supplement with minerals & B vitamins except B12 & folate
Transition to multivitamin for foundational support of
methylation pathWith cofactors, vitamins, minerals of methylation cycle, highly bioavailable, active forms e.g., Puregenomics
Start slowly, one new supplement/dose at a timeCheck B12 levels before giving folateConcurrently address other issues - e.g. inflammation, GI problemsWork with the MD regarding certain
medications,
diagnosesSlide50
Monitoring Nutrition SupportFollow-up
- how pathways are “pushed” or driven; feelings of detoxificationMonitor dietary and lifestyle changes, supplement compliance, symptom changes (digestive, mood, sleep, pain), side effects3-6 months revisit physiological biomarkersSlide51
Assessing Nutrition Intervention for COMT
NeurotransmittersSlide52
COMT GeneVal/Met158 SNP
Another SNP with Nutritional Relevancein methylation pathwayCatechol-O-methyltransferase
Gene function: encodes catechol-
O-methyltransferase enzyme
Enzyme function: metabolizes and detoxifies dopamine, norepinephrine, epinephrine and estrogens through methylation processSlide53
COMT GeneVal/Met158 SNP
Catechol-O-methyltransferase Potential impact of reduced enzyme function of this SNP
Patient may feel excessive stimulation - alertness, wakefulness, sleeplessness, restlessness — norepinephrine, epinephrine are stimulantsDopamine, norepinephrine, epinephrine & estrogens may build up
May have greater impulsivity in behavior choiceCognitive performance may be affectedSlide54
Targeted Nutrition Support
STRATEGY: SUPPORT ALTERNATE METHYLATION PATHWAYS, SUPPORT
LIVER,
FOSTER RELAXATION & SLEEP
Support alternate pathways that bypass the COMT SNPDiet – More foods rich in B12
Supplement
-
Multivitamin
with B
vitamins
(
adenosyl
/
hydroxycobalamin
)
Avoid COMT inhibitors - caffeine, green tea, quercetin
Support Liver (detoxification including estrogen detox)
Diet
-
M
ore
cruciferous vegetables, garlic, onion,
fruits
,
vegetables
, nuts,
herbs
,
spices
Diet
-
O
rganic
foods and animal protein without raised without hormones or antibiotics, as much as possible
for COMT Val/Met 158 SNPSlide55
Targeted Nutrition Support
Support Liver & Detox (con’t)Supplement - DIM (diindolylmethane)
Lifestyle - Moderate alcohol, no smoking, less toxic household cleaners, beauty and hair
products, reduce toxic loadSupport Sleep & Relaxation - alternate pathways/bypass COMT SNP
Diet - Foods rich in magnesium Supplement - Magnesium at bedtime
Lifestyle
– Incorporate
yoga
, meditation, breathing exercises,
etc.
,
promote
relaxed mood
Lifestyle
-
Follow
sleep hygiene
principles
,
support
sleep
quality/quantity
* Work closely with MD if patient has mood disorder/cognitive diagnosis
for COMT Val/Met 158 SNPSlide56
More Genes with Nutritional Relevance
Potential Impact of SNPsDAO & HNMT
- potential for histamine intolerance
HLA-DQ - potential for celiac disease95% with celiac disease have SNP in HLA-DQ2 gene;
most remaining 5% have SNP in HLA-DQ8 gene
CYP1A2
- may be fast or slow metabolizer of caffeine
ACE
-
may have increased risk high
B
P when high Na intakeSlide57
More Genes with Nutritional Relevance
Potential Impact of SNPsMTRR - may have
slower B12 regeneration
CBS - may have reduction of intermediates required
for transsulfuration and detoxificationTCN2 - delivery of B12 to cells may be limited
FUT2
-
intestinal microbial diversity and
bifidobacteria
levels may be low;
may
also be
protective
of B12 statusSlide58
More Genes with Nutritional Relevance
Potential Impact of SNPsGC - may have increased risk of suboptimal
Vit D status
TCF7L2 - may have increased risk of type 2 diabetes
NOS3 - may have higher circulating levels of triglyceridesBCOM1
-
may have limited
β
-carotene to Vitamin A conversion
THIS PARTIAL LIST WILL CONTINUE TO GROW!Slide59
NutrigenomicsBest Practices
Focus on well-researched, evidence-based nutritionally relevant SNPsSNPs represent potential for suboptimal functioning –
their expression not predeterminedA homozygous SNP (+/+) can have more significant health implications compared to milder heterogeneous genotype
Understand the gene’s role, related biochemical pathwaysSlide60
Keeping Nutrigenomics 2016 in Perspective
Providing Clues and Potential, Not CertaintyGenetic research and relevance of SNPs in its infancyIf multiple SNPs in a particular gene, impact may be more significant
Nutrigenomics is complementary with medical nutrition therapy, integrative
nutrition approachesLook at all the clues …
do they validate each other?Treat
the patient not the SNP!Slide61
No SNP is an IslandGenes don't work in isolation
— work synergisticallyChronic diseases affected by multiple genes; impact of single SNP, even if relevant, usually small
Body designed with “backup systems” — biochemical
pathways overlapMay be compensatory genes in closely related pathways that support the body’s performanceMix of positive and negative environmental factors that impact genes (and SNPs) and their expression is infiniteSlide62
Plus Gut DNA!Gut microbiome -
second pool of person’s genetic material100 trillion bacteria in gut have their own DNA!(10x more than 10 trillion human cells in body)
Foods we eat influence composition of individual’s gut biomeGut bacteria (under their DNA instructions) respond to food just like
human genes; their end products influence epigenetic expressionExamples: gut bacteria’s response to dietary fiber and phytochemicalsRDs already address balance of gut ecology with
diet, probioticsSlide63
Nutrigenomics - A New Tool
Using Genetic Clues to Personalize Nutrition Counseling
Nutrigenomics provides an exciting new
tool for Registered Dietitians
to
personalize nutrition care by matching diet and lifestyle with a client’s genotype and biochemical individuality…to optimize health.Slide64
Nutrigenomics
Part of Functional Medicine ModelHealth now recognized as more than absence of diseaseNutritional imbalances characteristic of chronic disease
Concept of multiple diseases existing independently from one another is
being replaced by understanding that origins of illness can often be traced to the same physiological disturbances and common underlying pathways - adapted from Jeffrey Bland, PhDSlide65
Future of NutrigenomicsSlide66
Present & Future Research
More Precise Predictability, Disease Prevention, Early Intervention, Confirmation
More information about gene function, nutritionally relevant SNPs, clinical
implicationsMore research on effects of foods & nutrition supplements on gene expressionMore specific biomarkers (various stages of pre, early and full disease onset) that reflect gene expression/genetic differences
Growth of genetic profile databases, related health profiles Understanding of multiple SNPs in multiple genes that collectively influence
likelihood
of developing common and complex diseases
Mechanisms of gene expression transfer between generations & health implications
New direct reporting to consumerSlide67
Future of Nutrigenomics
…will evolve from providing clues to underlying root causes to offering better predictive tools
…will ready us for the earliest nutrition intervention to treat disease if it occurs, in a precise, targeted way
…will evolve as a framework to design and prioritize personalized diet and lifestyle plans for optimal health and preventive strategies before disease presentsSlide68
ResourcesDIFM -
integrativeRD.org DIFM list serve - Q & A’s with fellow RDsLinks to testing, books and websites International Society of
Nutrigenetics and Nutrigenomics (ISSN) relationshipSlide69
Resources
Dr. Amy Yasko – knowyourgenetics.com - neurological/autism
Dr
. Ben Lynch: mthfr.netmthfrsupport.com
Dr. Eric Balcavage – the methylationdoctor.com
SNPedia
– snpedia.comSlide70
Resources
NIHNational Center for Biotechnology Information ncbi.nlm.nih.gov/clinvar
/
National Human Genome Research Institute genome.gov
Genetics Home Reference, US National Library of Medicineghr.nlm.nih.gov Genome magazine – genomemag.comSlide71
Definitions
Genome - The sum total of all the genetic information in an organism; its instruction book—the blueprint that directs the development and functioning of human beings and other organisms.Genomics - The study of genes and their function.
Nutrigenetics - Focuses on the impact the changes in our genes (also referred to as polymorphisms) have on our potential health path,
which is strongly influenced by food, nutrition, stress, and toxins.
Nutrigenomics - Concentrates on the impact of diet and lifestyle factors, such as food, nutrition, stress, and toxins on gene expression.
Nutritional Epigenomics -
Focuses on the
changes in gene expression influenced by modifications to DNA and its associated proteins without changing the nucleotide sequence of DNA
, where the genetic information is stored. These epigenomics changes affect gene expression and can also be inherited.Slide72
Contact Me
Janet Zarowitz, MS, RD, CDNIntegrative and Functional Nutritionist
www.mysupplementRD.com
Janet@mysupplementRD.com
914-222-3919