Locally harvested foods support serum 25-hydroxyvitamin D sufficiency in an indigenous population of Western Alaska

Luick, Bret; Bersamin, Andrea; Stern, Judith S.

doi:10.3402/ijch.v73.22732

Cited by 21 publications

(19 citation statements)

References 44 publications

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“…Individuals who consume traditional foods have high levels of many nutrients in their diet, including protein, vitamin A, most B vitamins, vitamin C, vitamin D, vitamin E, phosphorus, iron, niacin, selenium and omega-3 fatty acids [3,4,6,20,21,25,27,30,41]. The amount of traditional foods consumed varied by age, education and geographic location in the study populations [4,6,42].…”

Section: Resultsmentioning

confidence: 99%

A scoping review of traditional food security in Alaska

Walch

Loring

Johnson

et al. 2018

International Journal of Circumpolar Health

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Food insecurity is a public health concern. Food security includes the pillars of food access, availability and utilisation. For some indigenous peoples, this may also include traditional foods. To conduct a scoping review on traditional foods and food security in Alaska. Google Scholar and the High North Research Documents were used to search for relevant primary research using the following terms: “traditional foods”, “food security”, “access”, “availability”, “utilisation”, “Alaska”, “Alaska Native” and “indigenous”. Twenty four articles from Google Scholar and four articles from the High North Research Documents were selected. The articles revealed three types of research approaches, those that quantified traditional food intake (n=18), those that quantified food security (n=2), and qualitative articles that addressed at least one pillar of food security (n=8). Limited primary research is available on food security in Alaskan. Few studies directly measure food security while most provide a review of food security factors. Research investigating dietary intake of traditional foods is more prevalent, though many differences exist among participant age groups and geographical areas. Future research should include direct measurements of traditional food intake and food security to provide a more complete picture of traditional food security in Alaska.

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Section: Resultsmentioning

confidence: 99%

A scoping review of traditional food security in Alaska

Walch

Loring

Johnson

et al. 2018

International Journal of Circumpolar Health

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“…The importance of traditional dietary intake to vitamin D status of Alaska Native people and people of the Canadian Arctic and Greenland has been well documented in recent years (2; 3; 6; 10; 34; 35; 36) . Two recent studies highlight this point for the contemporary Yup’ik population of the YK Delta: one study found that 90% of self-reported dietary vitamin D intake was from fish (6) , and another found that traditional dietary intake (measured as the RBC δ 15 N value) explained 21% of inter-individual differences in serum 25(OH)D 3 concentration (7) . At the latitude of Alaska, pre-vitamin D 3 production in the skin essentially ceases from October through March (37; 38; 39) , making Alaskans and other high latitude populations particularly dependent on dietary sources of vitamin D (10; 11) .…”

Section: Discussionmentioning

confidence: 99%

Declines in traditional marine food intake and vitamin D levels from the 1960s to present in young Alaska Native women

O’Brien

Thummel

Bulkow

et al. 2016

Public Health Nutr.

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Objective To measure the trends in traditional marine food intake and serum vitamin D levels in Alaska Native women of childbearing age (20–29 years old) from 1960 to the present. Design We measured a biomarker of traditional food intake, the δ15N value, and vitamin D level, as 25(OH)D3 concentration, in 100 serum samples from 20–29 year old women archived in the Alaska Area Specimen Bank, selecting 25 per decade from the 1960s to 1990s. We compared these to measurements of RBC δ15N values and serum 25(OH)D3 concentrations from 20–29 year old women from the same region collected during the 2000s and 2010s in a Center for Alaska Native Health Research study. Setting The Yukon Kuskokwim Delta region of Southwest Alaska. Subjects 319 Alaska Native women aged 20–29 years at the time of specimen collection. Results Intake of traditional marine foods, as measured by serum δ15N values, decreased significantly each decade from the 1960s through the 1990s, then remained constant from the 1990s through the present (F5,306 = 77.4, p < 0.0001). Serum vitamin D concentrations also decreased from the 1960s to the present (F4,162 = 26.1, p < 0.0001). Conclusions Consumption of traditional marine foods by young Alaska Native women dropped significantly between the 1960s and the 1990s and was associated with a significant decline in serum vitamin D concentrations. Studies are needed to evaluate the promotion of traditional marine foods and routine vitamin D supplementation during pregnancy for this population.

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“…PTH plays a critical role in calcium homeostasis and is involved in vitamin D metabolism. The traditional diet of the Yup’ik people, which contains a large amount of marine-derived fatty acids, is also rich in vitamin D [55]. Additionally, variation in PTH and the gene encoding the vitamin D receptor ( VDR , geneID 7421) has been tied to obesity-related traits.…”

Section: Discussionmentioning

confidence: 99%

Linkage and association analysis of obesity traits reveals novel loci and interactions with dietary n-3 fatty acids in an Alaska Native (Yup’ik) population

et al. 2015

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Objective To identify novel genetic markers of obesity-related traits and to identify gene-diet interactions with n-3 polyunsaturated fatty acid (n-3 PUFA) intake in Yup’ik people. Material and Methods We measured body composition, plasma adipokines and ghrelin in 982 participants enrolled in the Center for Alaska Native Health Research (CANHR) Study. We conducted a genome-wide SNP linkage scan and targeted association analysis, fitting additional models to investigate putative gene-diet interactions. Finally, we performed bioinformatic analysis to uncover likely candidate genes within the identified linkage peaks. Results We observed evidence of linkage for all obesity-related traits, replicating previous results and identifying novel regions of interest for adiponectin (10q26.13-2) and thigh circumference (8q21.11-13). Bioinformatic analysis revealed DOCK1, PTPRE (10q26.13-2) and FABP4 (8q21.11-13) as putative candidate genes in the newly identified regions. Targeted SNP analysis under the linkage peaks identified associations between three SNPs and obesity-related traits: rs1007750 on chromosome 8 and thigh circumference (P=0.0005), rs878953 on chromosome 5 and thigh skinfold (P=0.0004), and rs1596854 on chromosome 11 for waist circumference (P=0.0003). Finally, we showed that n-3 PUFA modified the association between obesity related traits and two additional variants (rs2048417 on chromosome 3 for adiponectin, P for interaction=0.0006 and rs730414 on chromosome 11 for percentage body fat, P for interaction=0.0004). Conclusions This study presents evidence of novel genomic regions and gene-diet interactions that may contribute to the pathophysiology of obesity-related traits among Yup’ik people.

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Locally harvested foods support serum 25-hydroxyvitamin D sufficiency in an indigenous population of Western Alaska

Cited by 21 publications

References 44 publications

A scoping review of traditional food security in Alaska

A scoping review of traditional food security in Alaska

Declines in traditional marine food intake and vitamin D levels from the 1960s to present in young Alaska Native women

Linkage and association analysis of obesity traits reveals novel loci and interactions with dietary n-3 fatty acids in an Alaska Native (Yup’ik) population

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