{"id":1276,"date":"2022-08-14T14:30:52","date_gmt":"2022-08-14T14:30:52","guid":{"rendered":"https:\/\/neuroepic.mcdb.lsa.umich.edu\/wp\/?page_id=1276"},"modified":"2023-04-07T17:47:12","modified_gmt":"2023-04-07T17:47:12","slug":"nature-nurture-and-nutrition-epigenetics-of-child-development","status":"publish","type":"page","link":"https:\/\/courses.lsa.umich.edu\/neuroepic\/nature-nurture-and-nutrition-epigenetics-of-child-development\/","title":{"rendered":"Nature, Nurture, and Nutrition: Epigenetics of Child Development"},"content":{"rendered":"\n<p class=\"has-text-align-center wp-block-paragraph\">Teanne Davis &#8217;22 and Journey Monegain &#8217;22<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-rich is-provider-spotify wp-block-embed-spotify wp-embed-aspect-21-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"Spotify Embed: 46. Nature, Nurture, and Nutrition: Epigenetics of Child Development\" style=\"border-radius: 12px\" width=\"100%\" height=\"152\" frameborder=\"0\" allowfullscreen allow=\"autoplay; clipboard-write; encrypted-media; fullscreen; picture-in-picture\" loading=\"lazy\" src=\"https:\/\/open.spotify.com\/embed\/episode\/0LjF6vhN6xzwFpJPVR9tbm?si=9849f968cd8c4c39&#038;utm_source=oembed\"><\/iframe>\n<\/div><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\">There\u2019s a constant debate between nature and nurture. Is it because of my genes that I behave the way I do, or is it because of my environment, like the foods I eat and the places I live? This is a question on the minds of many reflecting on their health, especially for parents concerned for the health of their children. <a href=\"http:\/\/www.urbanchildinstitute.org\/articles\/updates\/nutrition-and-early-brain-development#:~:text=Nutrition%20has%20been%20called%20the,critical%20for%20normal%20brain%20development.\">Nutrition<\/a> is essential for child development, but not only for building strong bones. Nutrition is critical for strong brain development, particularly learning and memory, from conception to adolescence.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">So is nurturing your child the solitary factor for healthy development? No! Genes&nbsp; play a central<strong> <\/strong>role because they carry information that determines traits such as eye color, freckles, and even <a href=\"https:\/\/www.verywellmind.com\/genes-and-development-2795114\">personality<\/a>. But just because you are very extraverted doesn\u2019t necessarily mean that your child will have this trait too. Genes are instructions like a blueprint that are passed down. You get instructions from your mom and your dad at birth, and your child will get instructions from you and your partner as well. Just like a blueprint, genes help determine individuality, but both nature and nurture are central to a child\u2019s development.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">However we see a person\u2019s genes as the fixed products of a \u201cgenetic lottery\u201d <a href=\"https:\/\/doi.org\/10.1080\/14636778.2015.1034850\">we buy into<\/a> other&nbsp; problematic ideas. If it\u2019s all up to luck it follows that any inequalities that we observe are natural and a product of chance, unaffected by outside forces. This perspective excuses the long legacy of social and institutional discrimination by blaming individuals for having \u201cbad\u201d genes, but also serves as a gateway to eugenic beliefs about getting rid those who don\u2019t have \u201cgood genes.\u201d For example, some people try to claim that intelligence is determined by your genes, and that differences in learning outcomes are due to biological differences. However, studies show that nutrition can have huge impacts on a child\u2019s ability to learn. The nutrition children experience is contingent upon social factors though, such as physical and financial access.&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For this reason, it\u2019s important to not solely rely on genetics to understand childhood learning and memory, but also consider the environmental stresses that affect health and development. This is where the field of epigenetics comes in.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.cdc.gov\/genomics\/disease\/epigenetics.htm#:~:text=Epigenetics%20is%20the%20study%20of,body%20reads%20a%20DNA%20sequence.\">Epigenetics<\/a> encompasses both nature and nurture, and studies how the environment influences gene expression. Scientists now understand that your gene expression is not solely determined by what the exact instructions say. Environmental conditions (what is \u201con top\u201d of your genes, the \u201cepi-\u201d in epigenetics) play a role in regulating what parts of the instructions get read. The body translates these environmental stresses by adding or removing modifying \u201ctags\u201d that tell your cells which genes should be turned on and which genes should be turned off. These tags could change over the course of your lifetime.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To think about this in a different way, let\u2019s now imagine that our DNA is a sweater store filled with beautifully designed sweaters that represent our genes. In this analogy, we can think of epigenetic tags as price tags attached to our lovely sweaters, and the cellular machinery that decides whether to express a gene or not, as \u201cyou,\u201d the shopper.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For example, if you are eating healthy foods and exercising daily, you may have epigenetic tags that encourage the transcription of healthy hair genes. A cashmere sweater has a price tag for $1? Yes! This tag encouraged you to \u201cbuy\u201d this sweater, and thus transcribe and express those genes.&nbsp; However, if you\u2019re instead exposed to environmental stresses such as pollution and lack of access to healthy food, costlier tags might be added. Uh oh&#8230;that same cashmere sweater now has an epigenetic tag for $2,000. Absolutely not, this sweater will remain at the store, and that gene will be \u201coff\u201d. This is called gene silencing, because the gene will not be expressed.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Researchers have found evidence that this sort of gene silencing and other epigenetic changes can be affected by nutrition, which can then have consequences for learning and memory.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When tackling the relationship between nutrition and a child\u2019s development, it is important to understand the difference between undernourishment and nutrient deficiency. <a href=\"https:\/\/www.concern.org.uk\/news\/whats-difference-between-malnutrition-and-undernutrition-and-why-it-important\">Undernourishment<\/a> is the condition of not eating enough food or having a diet that lacks proper nutrition and food variety to be in good health. Nutrient deficiency is the lack of one or more essential vitamins or minerals. In subsistence farming communities in <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/24781383\/\">Gambia,<\/a> seasonal variation such as rainy or dry climates limited the availability of specific foods. Researchers discovered that maternal nutrition around the time of conception was shown to have permanent long term effects on DNA methylation (the shopping tags that control which sweaters (genes) are purchased or not (turned on or off)) in offspring from childhood to adulthood. Maternal undernutrition can lead to fetal growth <a href=\"https:\/\/kidshealth.org\/en\/parents\/iugr.html\">restriction <\/a>and underweight babies. In addition to undernourishment, nutrient deficiency is important for the progression of a child\u2019s learning and memory as well.&nbsp;<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><em>Choline deficiency&nbsp;<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Researchers have conducted a series of studies focused on the impacts of choline, <a href=\"https:\/\/www.hsph.harvard.edu\/nutritionsource\/choline\/\">an essential nutrient<\/a> for movement, memory, and cognition. It\u2019s abundant in food products like meat, fish, dairy, eggs, and certain vegetables, which tend to be more expensive than less-expensive, more processed alternatives. This might partially account for why people in Western countries don\u2019t get the recommended daily intake.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To study the consequences of this dietary deficit, one research group examined the effects of a choline deficiency on <a href=\"https:\/\/doi.org\/10.1111\/j.1471-4159.2004.02414.x\">human cells<\/a> and in <a href=\"https:\/\/doi.org\/10.1096\/fj.05-4707com\">rats<\/a>. In groups of cells or rats that were choline deficient, there was an observed decrease in the methylation of a gene that codes for something called a cell-cycle-inhibitor. To use our sweater analogy, it was on a sale too good to ignore. As a result, the cells \u201cbought\u201d too much of this gene, which would likely lead to limited growth and would derail the normal development of important brain structures.&nbsp;<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><em>The Western diet<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">On the opposite end of nutritional concerns, scientists have also worried that we might have too much of certain nutrients in our diets. Specifically, they\u2019ve looked into what is being called the Western diet (WD) which describes a diet that is high in sugar and saturated fat due to the high consumption of processed foods.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In <a href=\"https:\/\/doi.org\/10.1039\/c7fo01602f\">one study<\/a>, rats fed a WD had different patterns of methylation in brain regions associated with learning and memory. While the exact mechanism is unknown, the researchers suspect that the effect of this tagging on genes might lead to lowered cognitive function. <a href=\"https:\/\/doi.org\/10.1016\/j.bbr.2007.05.004\">Another research group<\/a> found that rats that had unrestricted access to a WD had decreased expression of an important brain factor that helps the brain develop new connections between neurons. Behaviorally, they observed that these rats had an impaired ability to learn, which also implicates the WD as having possible, enduring effects on learning. These two studies suggest that the WD might be creating a mess in our genetic sweater store, causing us to end up with too little expression of genes that are helpful for learning and memory, and too much of some of the unhelpful ones.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">These studies aren\u2019t without limitations, though. The rat studies included in this paper, like many in the field, only experiment with a small number of specimens, which limits the validity and generalizability of their findings. We can&#8217;t, for example, conclude that just because we observe something in rats, that the exact same thing is happening with humans. Furthermore, we still don\u2019t fully understand the effects that a certain nutrient or diet might have on the entire body. Maybe in some pathways it\u2019s helpful but in others it could be harmful. Given these limitations, we don\u2019t mean to present any of these studies as telling absolute truths. Rather, we see them as starting points for further exploration, and early indicators of the link between nature and nurture.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">These findings tell a story of how nutrition epigenetically influences development. But what do we do with this information as we start to learn it? If it is our environment that plays a role in shaping us, what can we do to make sure that that influence is helpful, not harmful?&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">We can start by asking critical questions about what we see now. Why do some children face undernourishment or deficiency? Why do some have to depend on the Western diet, while others do not?&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If we take a look at nutrition, a lot of it comes down to food access, both physical and financial. Low income families might have to prioritize buying less expensive foods, but these tend to be highly processed, nutritionally poorer, shelf stable foods. It\u2019s no surprise then, that income is significantly associated with<a href=\"https:\/\/www.aafp.org\/about\/policies\/all\/poverty-health.html\"> health outcomes<\/a>. Worse yet, some families might find themselves living in food deserts, which are areas in which residents don\u2019t have access to healthy food options. If a child grows up with these environmental disadvantages, research suggests this might make it harder for them to learn and grow.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Knowing this, we must be cautious of what interventions epigenetics research is used to support and develop. Our public health policy should not simply instruct parents to make better dietary choices for their children, when not all choices are available. Instead, we should try to improve the nutritional environment so any resulting epigenetic influences on a child\u2019s learning and memory are the healthiest and fairest they can be.&nbsp;<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><strong>References<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Heijmans, B. T., Tobi, E. W., Stein, A. D., Putter, H., Blauw, G. J., Susser, E. S., Slagboom, P. E., &amp; Lumey, L. H. (2008). Persistent epigenetic differences associated with prenatal exposure to famine in humans. <em>Proceedings of the National Academy of Sciences<\/em>, <em>105<\/em>(44), 17046\u201317049.<a href=\"https:\/\/doi.org\/10.1073\/pnas.0806560105\"> <\/a>https:\/\/doi.org\/10.1073\/pnas.0806560105<\/li>\n\n\n\n<li>Kaar, J. L., Hanson, J. L., Caskey, S. A., Jimenez, S., Lane, L., Krebs, N. F., &amp; Thompson, D. A. (2018). Beyond nutrition knowledge and tools\u2014what do pediatric providers really need? <em>Medical Science Educator<\/em>, <em>29<\/em>(1), 307\u2013314. https:\/\/doi.org\/10.1007\/s40670-018-00644-7&nbsp;<\/li>\n\n\n\n<li>Kanoski, S. E., Meisel, R. L., Mullins, A. J., &amp; Davidson, T. L. (2007). The effects of energy-rich diets on discrimination reversal learning and on BDNF in the hippocampus and prefrontal cortex of the rat. <em>Behavioural Brain Research<\/em>, 182(1), 57\u201366. https:\/\/doi.org\/10.1016\/j.bbr.2007.05.004&nbsp;<\/li>\n\n\n\n<li>Leroy, J. L., Frongillo, E. A., Dewan, P., Black, M. M., &amp; Waterland, R. A. (2020). Can children catch up from the consequences of undernourishment? evidence from child linear growth, developmental epigenetics, and brain and neurocognitive development. <em>Advances in Nutrition<\/em>, <em>11<\/em>(4), 1032\u20131041. https:\/\/doi.org\/10.1093\/advances\/nmaa020&nbsp;<\/li>\n\n\n\n<li>Meloni, M. (2015). Epigenetics for the social sciences: Justice, embodiment, and inheritance in the postgenomic age. <em>New Genetics and Society<\/em>, <em>34<\/em>(2), 125\u2013151.<a href=\"https:\/\/doi.org\/10.1080\/14636778.2015.1034850\"> <\/a>https:\/\/doi.org\/10.1080\/14636778.2015.1034850<\/li>\n\n\n\n<li>Niculescu, M. D., Craciunescu, C. N., &amp; Zeisel, S. H. (2006). Dietary choline deficiency alters global and gene-specific DNA methylation in the developing hippocampus of mouse fetal brains. <em>The FASEB Journal\u202f: Official Publication of the Federation of American Societies for Experimental Biology<\/em>, 20(1), 43\u201349.<a href=\"https:\/\/doi.org\/10.1096\/fj.05-4707com\"> <\/a>https:\/\/doi.org\/10.1096\/fj.05-4707com<\/li>\n\n\n\n<li>Niculescu, M. D., Yamamuro, Y., &amp; Zeisel, S. H. (2004). Choline availability modulates human neuroblastoma cell proliferation and alters the methylation of the promoter region of the cyclin-dependent kinase inhibitor 3 gene. <em>Journal of Neurochemistry<\/em>, 89(5), 1252\u20131259.<a href=\"https:\/\/doi.org\/10.1111\/j.1471-4159.2004.02414.x\"> <\/a>https:\/\/doi.org\/10.1111\/j.1471-4159.2004.02414.x<\/li>\n\n\n\n<li>Yokoyama, A. S., Dunaway, K., Rutkowsky, J., Rutledge, J. C., &amp; Milenkovic, D. (2018). Chronic consumption of a western diet modifies the DNA methylation profile in the frontal cortex of mice. Food &amp; Function, 9(2), 1187\u20131198. https:\/\/doi.org\/10.1039\/c7fo01602f<\/li>\n<\/ol>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><strong>Non-Journal Citations and Multimedia&nbsp;<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>12 Ways To Stay Healthy During Pregnancy. Brigham Health Hub. (2021). https:\/\/brighamhealthhub.org\/12-ways-to-stay-healthy-during-pregnancy\/<\/li>\n\n\n\n<li>Bloxham, L. (2020). What\u2019s the difference between malnutrition and undernutrition, and why is it important? https:\/\/www.concern.org.uk\/news\/whats-difference-between-malnutrition-and-undernutrition-and-why-it-important&nbsp;<\/li>\n\n\n\n<li>Cherry, K. (2020). How Genes Influence Child Development. https:\/\/www.verywellmind.com\/genes-and-development-2795114&nbsp;<\/li>\n\n\n\n<li>Choline. (2022). Harvard School of Public Health. https:\/\/www.hsph.harvard.edu\/nutritionsource\/choline\/&nbsp;<\/li>\n\n\n\n<li>Hirsch, L. (2020). Intrauterine Growth Restriction (IUGR). https:\/\/kidshealth.org\/en\/parents\/iugr.html&nbsp;<\/li>\n\n\n\n<li>Nutrition and Early Brain Development. (2011). The Urban Child Institute. http:\/\/www.urbanchildinstitute.org\/articles\/updates\/nutrition-and-early-brain-development#:~:text=Nutrition%20has%20been%20called%20the,critical%20for%20normal%20brain%20development.&nbsp;<\/li>\n\n\n\n<li>Poverty and Health &#8211; The Family Medicine Perspective. (2021). American Academy of Family Physicians. https:\/\/www.aafp.org\/about\/policies\/all\/poverty-health.html&nbsp;<\/li>\n\n\n\n<li>Waxman, E. (2016). <em>Mapping food insecurity and distress in American Indian and Alaska Native communities. <\/em>https:\/\/www.urban.org\/urban-wire\/mapping-food-insecurity-and-distress-american-indian-and-alaska-native-communities&nbsp;<\/li>\n\n\n\n<li>What is Epigenetics? (2020). U.S. Department of Health and Human Services. https:\/\/www.cdc.gov\/genomics\/disease\/epigenetics.htm#:~:text=Epigenetics%20is%20the%20study%20of,body%20reads%20a%20DNA%20sequence.&nbsp;<\/li>\n<\/ol>\n\n\n\n<div class=\"wp-block-group is-content-justification-space-between is-nowrap is-layout-flex wp-container-core-group-is-layout-f36ac205 wp-block-group-is-layout-flex\">\n\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Teanne Davis &#8217;22 and Journey Monegain &#8217;22 There\u2019s a constant debate between nature and nurture. Is it because of my genes that I behave the way I do, or is it because of my environment, like the foods I eat and the places I live? This is a question on the minds of many reflecting&hellip; <a class=\"more-link\" href=\"https:\/\/courses.lsa.umich.edu\/neuroepic\/nature-nurture-and-nutrition-epigenetics-of-child-development\/\">Continue reading <span class=\"screen-reader-text\">Nature, Nurture, and Nutrition: Epigenetics of Child Development<\/span><\/a><\/p>\n","protected":false},"author":2634,"featured_media":1940,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1276","page","type-page","status-publish","has-post-thumbnail","hentry","entry"],"_links":{"self":[{"href":"https:\/\/courses.lsa.umich.edu\/neuroepic\/wp-json\/wp\/v2\/pages\/1276","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/courses.lsa.umich.edu\/neuroepic\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/courses.lsa.umich.edu\/neuroepic\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/courses.lsa.umich.edu\/neuroepic\/wp-json\/wp\/v2\/users\/2634"}],"replies":[{"embeddable":true,"href":"https:\/\/courses.lsa.umich.edu\/neuroepic\/wp-json\/wp\/v2\/comments?post=1276"}],"version-history":[{"count":1,"href":"https:\/\/courses.lsa.umich.edu\/neuroepic\/wp-json\/wp\/v2\/pages\/1276\/revisions"}],"predecessor-version":[{"id":2742,"href":"https:\/\/courses.lsa.umich.edu\/neuroepic\/wp-json\/wp\/v2\/pages\/1276\/revisions\/2742"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/courses.lsa.umich.edu\/neuroepic\/wp-json\/wp\/v2\/media\/1940"}],"wp:attachment":[{"href":"https:\/\/courses.lsa.umich.edu\/neuroepic\/wp-json\/wp\/v2\/media?parent=1276"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}