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  1. Article ; Online: Longitudinal autoantibody responses against tumor-associated antigens decrease in breast cancer patients according to treatment modality.

    Evans, Rick L / Pottala, James V / Nagata, Satoshi / Egland, Kristi A

    BMC cancer

    2018  Volume 18, Issue 1, Page(s) 119

    Abstract: Background: Metastatic breast cancer (BCa) is most often diagnosed months after completion of treatment of the primary tumor when a patient reports physical symptoms. Besides a physical examination, no other alternative recurrence screening method is ... ...

    Abstract Background: Metastatic breast cancer (BCa) is most often diagnosed months after completion of treatment of the primary tumor when a patient reports physical symptoms. Besides a physical examination, no other alternative recurrence screening method is recommended for routine follow-up care. Detection of autoantibodies against tumor-associated antigens (TAAs) has demonstrated promise for distinguishing healthy women from patients diagnosed with primary BCa. However, it is unknown what changes occur to patient autoantibody levels during and after treatment.
    Methods: Three serial blood draws were collected from 200 BCa patients: before treatment, 6 and 12 months after surgery. Patients were categorized according to treatment regimen, including surgery, chemotherapy, radiation, trastuzumab and hormonal therapies. The longitudinal samples were assayed for autoantibody responses against 32 conformation-carrying TAAs using a Luminex multiplex bead assay.
    Results: The treatment modality groups that had the greatest decrease in autoantibody response levels were radiation + hormonal therapy; radiation + chemotherapy; and radiation + hormonal therapy + chemotherapy. For these three treatment groups, autoantibody responses against 9 TAAs (A1AT, ANGPTL4, CAPC, CST2, DKK1, GFRA1, GRN, LGALS3 and LRP10) were significantly reduced at 12 months after surgery compared to before treatment. One TAA, GRP78, had a significantly increased autoantibody response after 12 months.
    Conclusions: Single treatment regimens alone did not significantly alter autoantibodies levels against the studied TAAs. Radiation treatment was the common denominator of the three most affected groups for significant changes in autoantibody response levels.
    MeSH term(s) Adult ; Aged ; Antigens, Neoplasm/blood ; Autoantibodies/blood ; Biomarkers, Tumor/blood ; Breast Neoplasms/blood ; Breast Neoplasms/drug therapy ; Breast Neoplasms/pathology ; Breast Neoplasms/radiotherapy ; Combined Modality Therapy ; Early Detection of Cancer ; Female ; Humans ; Middle Aged ; Neoplasm Metastasis ; Neoplasm Recurrence, Local/blood ; Neoplasm Recurrence, Local/drug therapy ; Neoplasm Recurrence, Local/pathology ; Trastuzumab/administration & dosage
    Chemical Substances Antigens, Neoplasm ; Autoantibodies ; Biomarkers, Tumor ; Trastuzumab (P188ANX8CK)
    Language English
    Publishing date 2018--31
    Publishing country England
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ISSN 1471-2407
    ISSN (online) 1471-2407
    DOI 10.1186/s12885-018-4022-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: A comparative study of four independent methods to measure LDL particle concentration.

    Hopkins, Paul N / Pottala, James V / Nanjee, M Nazeem

    Atherosclerosis

    2015  Volume 243, Issue 1, Page(s) 99–106

    Abstract: Background: Low-density lipoprotein particle concentration (LDL-P) is generally more predictive of clinical cardiovascular endpoints than LDL cholesterol (LDL-C). Few studies have directly compared multiple LDL-P methods, particularly with ... ...

    Abstract Background: Low-density lipoprotein particle concentration (LDL-P) is generally more predictive of clinical cardiovascular endpoints than LDL cholesterol (LDL-C). Few studies have directly compared multiple LDL-P methods, particularly with ultracentrifugation.
    Objective: Examine comparability and precision of 4 LDL-P methods.
    Methods: We divided serum from 48 subjects into blinded triplicates and measured LDL-P in 3 separate laboratories by 4 methods: ultracentrifugation (reference method), a novel electrophoretic method, and nuclear magnetic resonance spectroscopy (NMR) by 2 independent methods: a 400 MHz Vantera(®) instrument supplied by Liposcience (LS-NMR) and operated at ARUP Laboratories, and a 600 MHz Bruker instrument (ASCEND 600) operated at Health Diagnostic Laboratory (HD-NMR).
    Results: Of the 4 methods, ultracentrifugation was the most precise and LS-NMR the least; the latter had a significantly greater CV (p < 0.0001) as compared with all 3 of the other methods, although all CVs were clinically acceptable. The electrophoretic method showed similar precision to ultracentrifugation, while HD-NMR was intermediate. The HD-NMR had the slope closest to 1 (0.90, 95% CI 0.71 to 1.09) and the intercept closest to 0 (-48, -353 to 256) compared to the ultracentrifugation method in Deming regression models. While the two NMR methods correlated well (r = 0.95) with each other and had a slope equivalent to 1 (1.08, 0.98 to 1.19), their intercept in Deming regression excluded 0 (194, 53 to 335) indicating a vertical shift between the two methods.
    Conclusions: This LDL-P method comparison may prove useful for future research and clinical applications.
    MeSH term(s) Apolipoproteins/chemistry ; Cholesterol, LDL/blood ; Clinical Laboratory Techniques/methods ; Electrophoresis ; Humans ; Magnetic Resonance Spectroscopy/methods ; Particle Size ; Regression Analysis ; Reproducibility of Results ; Risk Factors ; Ultracentrifugation/methods
    Chemical Substances Apolipoproteins ; Cholesterol, LDL
    Language English
    Publishing date 2015-11
    Publishing country Ireland
    Document type Comparative Study ; Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 80061-2
    ISSN 1879-1484 ; 0021-9150
    ISSN (online) 1879-1484
    ISSN 0021-9150
    DOI 10.1016/j.atherosclerosis.2015.08.042
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Classifying patients for breast cancer by detection of autoantibodies against a panel of conformation-carrying antigens.

    Evans, Rick L / Pottala, James V / Egland, Kristi A

    Cancer prevention research (Philadelphia, Pa.)

    2014  Volume 7, Issue 5, Page(s) 545–555

    Abstract: Patients with breast cancer elicit an autoantibody response against cancer proteins, which reflects and amplifies the cellular changes associated with tumorigenesis. Detection of autoantibodies in plasma may provide a minimally invasive mechanism for ... ...

    Abstract Patients with breast cancer elicit an autoantibody response against cancer proteins, which reflects and amplifies the cellular changes associated with tumorigenesis. Detection of autoantibodies in plasma may provide a minimally invasive mechanism for early detection of breast cancer. To identify cancer proteins that elicit a humoral response, we generated a cDNA library enriched for breast cancer genes that encode membrane and secreted proteins, which are more likely to induce an antibody response compared with intracellular proteins. To generate conformation-carrying antigens that are efficiently recognized by patients' antibodies, a eukaryotic expression strategy was established. Plasma from 200 patients with breast cancer and 200 age-matched healthy controls were measured for autoantibody activity against 20 different antigens designed to have conformational epitopes using ELISA. A conditional logistic regression model was used to select a combination of autoantibody responses against the 20 different antigens to classify patients with breast cancer from healthy controls. The best combination included ANGPTL4, DKK1, GAL1, MUC1, GFRA1, GRN, and LRRC15; however, autoantibody responses against GFRA1, GRN, and LRRC15 were inversely correlated with breast cancer. When the autoantibody responses against the 7 antigens were added to the base model, including age, BMI, race and current smoking status, the assay had the following diagnostic capabilities: c-stat (95% CI), 0.82 (0.78-0.86); sensitivity, 73%; specificity, 76%; and positive likelihood ratio (95% CI), 3.04 (2.34-3.94). The model was calibrated across risk deciles (Hosmer-Lemeshow, P = 0.13) and performed well in specific subtypes of breast cancer including estrogen receptor positive, HER-2 positive, invasive, in situ and tumor sizes >1 cm.
    MeSH term(s) Adenocarcinoma in Situ/blood ; Adenocarcinoma in Situ/classification ; Adenocarcinoma in Situ/diagnosis ; Adenocarcinoma in Situ/pathology ; Aged ; Antigens, Neoplasm/blood ; Antigens, Neoplasm/chemistry ; Antigens, Neoplasm/immunology ; Autoantibodies/blood ; Autoantibodies/immunology ; Biomarkers, Tumor/blood ; Breast Neoplasms/blood ; Breast Neoplasms/classification ; Breast Neoplasms/diagnosis ; Carcinoma, Ductal, Breast/blood ; Carcinoma, Ductal, Breast/classification ; Carcinoma, Ductal, Breast/diagnosis ; Carcinoma, Ductal, Breast/pathology ; Case-Control Studies ; Cell Line ; Early Detection of Cancer/methods ; Epitopes/blood ; Epitopes/immunology ; Female ; HEK293 Cells ; Humans ; Middle Aged ; Protein Conformation ; Receptor, ErbB-2/chemistry ; Receptor, ErbB-2/immunology ; Triage/methods
    Chemical Substances Antigens, Neoplasm ; Autoantibodies ; Biomarkers, Tumor ; Epitopes ; Receptor, ErbB-2 (EC 2.7.10.1)
    Language English
    Publishing date 2014-03-18
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 2434717-6
    ISSN 1940-6215 ; 1940-6207
    ISSN (online) 1940-6215
    ISSN 1940-6207
    DOI 10.1158/1940-6207.CAPR-13-0416
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Erythrocyte omega-3 fatty acids are inversely associated with incident dementia: Secondary analyses of longitudinal data from the Women's Health Initiative Memory Study (WHIMS).

    Ammann, Eric M / Pottala, James V / Robinson, Jennifer G / Espeland, Mark A / Harris, William S

    Prostaglandins, leukotrienes, and essential fatty acids

    2017  Volume 121, Page(s) 68–75

    Abstract: Objective: To assess whether red blood cell (RBC) docosahexaenoic acid and eicosapentaenoic acid (DHA+EPA) levels have a protective association with the risk of dementia in older women.: Methods: RBC DHA+EPA levels were assessed at baseline, and ... ...

    Abstract Objective: To assess whether red blood cell (RBC) docosahexaenoic acid and eicosapentaenoic acid (DHA+EPA) levels have a protective association with the risk of dementia in older women.
    Methods: RBC DHA+EPA levels were assessed at baseline, and cognitive status was evaluated annually in a cohort of 6706 women aged ≥65 years who participated in the Women's Health Initiative Memory Study (WHIMS). Cox regression was used to quantify the association between RBC DHA+EPA and the risk of probable dementia, independent of major dementia risk factors.
    Results: During a median follow-up period of 9.8 years, 587 incident cases of probable dementia were identified. After adjusting for demographic, clinical, and behavioral risk factors, a one standard deviation increase in DHA+EPA levels was associated with a significantly lower risk of dementia (HR = 0.92, 95% CI: 0.84, 1.00; p < 0.05). This effect estimate did not meaningfully change after further adjustment for baseline cognitive function and APOE genotype. For women with high DHA+EPA exposure (1SD above mean) compared to low exposure (1SD below mean), the adjusted 15-year absolute risk difference for dementia was 2.1% (95% CI: 0.2%, 4.0%). In secondary analyses, we also observed a protective association with longitudinal change in Modified Mini-Mental State (3MS) Exam scores, but no significant association with incident MCI, PD/MCI, or baseline 3MS scores.
    Discussion: Higher levels of DHA+EPA may help protect against the development of dementia. Results from prospective randomized controlled trials of DHA+EPA supplementation are needed to help clarify whether this association is causal.
    Language English
    Publishing date 2017-06
    Publishing country Scotland
    Document type Journal Article
    ZDB-ID 286714-x
    ISSN 1532-2823 ; 0952-3278
    ISSN (online) 1532-2823
    ISSN 0952-3278
    DOI 10.1016/j.plefa.2017.06.006
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Value of hemoglobin A1c in diagnosing diabetes mellitus within a chronic disease management system illustrated by the receiver operating characteristic curve.

    Eid, Wael E / Pottala, James V

    Endocrine practice : official journal of the American College of Endocrinology and the American Association of Clinical Endocrinologists

    2008  Volume 16, Issue 1, Page(s) 14–20

    Abstract: Objective: To develop a receiver operating characteristic (ROC) curve of glycosylated hemoglobin (HbA1c) for diagnosing diabetes mellitus within a chronic disease management system.: Methods: A case-control study including medical records from ... ...

    Abstract Objective: To develop a receiver operating characteristic (ROC) curve of glycosylated hemoglobin (HbA1c) for diagnosing diabetes mellitus within a chronic disease management system.
    Methods: A case-control study including medical records from January 1, 1997, to December 31, 2005, was conducted at the Sioux Falls Veterans Affairs Medical Center. Medical records for the case group (patients with diabetes) were selected based on 1 of 3 criteria: International Classification of Diseases, Ninth Revision, Clinical Modification or Current Procedural Terminology codes specific for type 1 and type 2 diabetes; patients' use of medications (oral hypoglycemic agents, antidiabetes agents, or insulin); or results from random blood or plasma glucose tests (at least 2 measurements of blood glucose > or = 200 mg/dL). Records for the control group were selected based on patients having HbA1c measured, but not meeting the above diagnostic criteria for diabetes during the study period. Records for cases and controls were randomly frequency-matched, one-to-one. The control group was randomly divided into 5 sets of an equal number of records. Five sets of an equal number of cases were then randomly selected from the total number of cases. Each test data set included 1 case group and 1 control group, resulting in 5 independent data sets.
    Results: In total, 5040 patient records met the case definition in the diabetes registry. Records of 15 patients who were prescribed metformin only, but did not meet any other case criteria, were reviewed and excluded after determining the patients were not diabetic. The control group consisted of 5 sets of 616 records each (totaling 3080 records), and the case group consisted of 5 sets of 616 records each (totaling 3080 records). Thus, each of the 5 independent data sets of 1 case group and 1 control group contained 1232 records. The case group was predominantly composed of white men (mean age, 69 years; mean body mass index, 31 kg/m2). Demographic data were similar for control patients. The ROC curve revealed that a HbA1c > or = 6.3% (mean + 1 SD) offered the most accurate cutoff value for diagnosing type 2 diabetes mellitus, with the following statistical values: C statistic, 0.78; sensitivity, 70%; specificity, 85%; and positive likelihood ratio, 4.6 (95% confidence interval, 4.2-5.0).
    Conclusion: A HbA1c value > or = 6.3% may be a useful benchmark for diagnosing diabetes mellitus within a chronic disease management system and may be a useful tool for monitoring high-risk populations.
    MeSH term(s) Aged ; Case-Control Studies ; Diabetes Mellitus/diagnosis ; Diabetes Mellitus/metabolism ; Female ; Glycated Hemoglobin A/metabolism ; Humans ; Male ; Middle Aged
    Chemical Substances Glycated Hemoglobin A ; hemoglobin A1c protein, human
    Language English
    Publishing date 2008-09-13
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1473503-9
    ISSN 1934-2403 ; 1530-891X
    ISSN (online) 1934-2403
    ISSN 1530-891X
    DOI 10.4158/EP09135.OR
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Membrane level of omega-3 docosahexaenoic acid is associated with severity of obstructive sleep apnea.

    Ladesich, James B / Pottala, James V / Romaker, Ann / Harris, William S

    Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine

    2011  Volume 7, Issue 4, Page(s) 391–396

    Abstract: Background: Patients with obstructive sleep apnea (OSA) are at increased risk of cardiovascular disease (CVD). The omega-3 fatty acid docosahexaenoic acid (DHA) is a major component of neural tissues, and supplementation with fish oils improves ... ...

    Abstract Background: Patients with obstructive sleep apnea (OSA) are at increased risk of cardiovascular disease (CVD). The omega-3 fatty acid docosahexaenoic acid (DHA) is a major component of neural tissues, and supplementation with fish oils improves autonomic tone and reduces risk for CVD. A link between low DHA status and less mature sleep patterns was observed in newborns.
    Methods: We investigated the relations between red blood cell (RBC) levels of DHA and OSA severity in 350 sequential patients undergoing sleep studies. Severity categories were defined as none/mild, moderate, and severe, based on apnea hypopnea index (AHI) scores of 0 to 14, 15 to 34, and > 34, respectively.
    Results: After controlling for age, sex, race, smoking, BMI, alcohol intake, fish intake, and omega-3 supplementation, RBC DHA was inversely related with OSA severity. For each 1-SD increase in DHA levels, a patient was about 50% less likely to be classified with severe OSA. The odds ratios (95% CI) were 0.47 (0.28 to 0.80) and 0.55 (0.31 to 0.99) for being in the severe group versus the none/mild or moderate groups, respectively.
    Conclusion: These findings suggest that disordered membrane fatty acid patterns may play a causal role in OSA and that the assessment of RBC DHA levels might help in the diagnosis of OSA. The effects of DHA supplementation on OSA should be explored.
    MeSH term(s) Adult ; Biomarkers/blood ; Blood Gas Analysis ; Cardiovascular Diseases/etiology ; Cardiovascular Diseases/prevention & control ; Cohort Studies ; Docosahexaenoic Acids/analysis ; Docosahexaenoic Acids/blood ; Erythrocyte Membrane/metabolism ; Fatty Acids, Omega-3/analysis ; Fatty Acids, Omega-3/blood ; Female ; Humans ; Male ; Middle Aged ; Polysomnography ; Predictive Value of Tests ; Prospective Studies ; Sensitivity and Specificity ; Severity of Illness Index ; Sleep Apnea, Obstructive/blood ; Sleep Apnea, Obstructive/complications ; Sleep Apnea, Obstructive/diagnosis
    Chemical Substances Biomarkers ; Fatty Acids, Omega-3 ; Docosahexaenoic Acids (25167-62-8)
    Language English
    Publishing date 2011-08-30
    Publishing country United States
    Document type Comparative Study ; Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2397213-0
    ISSN 1550-9397 ; 1550-9389
    ISSN (online) 1550-9397
    ISSN 1550-9389
    DOI 10.5664/JCSM.1198
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Determinants of Blood Cell Omega-3 Fatty Acid Content.

    Block, Robert C / Harris, William S / Pottala, James V

    The open biomarkers journal

    2009  Volume 1, Page(s) 1–6

    Abstract: BACKGROUND: Although red blood cell eicosapentaenoic acid (EPA) plus docosahexaenoic acid (DHA) content (the Omega-3 Index) predicts cardiovascular death, the factors determining the Index are unknown. METHODS: In 704 outpatients, we undertook an ... ...

    Abstract BACKGROUND: Although red blood cell eicosapentaenoic acid (EPA) plus docosahexaenoic acid (DHA) content (the Omega-3 Index) predicts cardiovascular death, the factors determining the Index are unknown. METHODS: In 704 outpatients, we undertook an investigation of the clinical determinants of the Index. RESULTS: Factors associated with the Index in decreasing order were: EPA+DHA supplement use, fish consumption frequency, triglyceride level, age, high cholesterol history, and smoking. These factors explained 59% of Index variability, with capsules/fish intake together accounting for 47%. The Index increased by 13% (p< 0.0001) for each serving level increase in fish intake and EPA+DHA supplementation correlated with a 58% increase (p< 0.0001) regardless of background fish intake (p=0.25; test for interaction). A 100 mg/dL decrease in serum triglycerides was associated with a 15% higher (p<0.0001) Index. CONCLUSIONS: The intake of EPA+DHA-rich foods and supplements principally determined the Omega-3 Index, but explained only about half of the variability.
    Language English
    Publishing date 2009-10-15
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 2600581-5
    ISSN 1875-3183
    ISSN 1875-3183
    DOI 10.2174/1875318300801010001
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  8. Article ; Online: Higher RBC EPA + DHA corresponds with larger total brain and hippocampal volumes: WHIMS-MRI study.

    Pottala, James V / Yaffe, Kristine / Robinson, Jennifer G / Espeland, Mark A / Wallace, Robert / Harris, William S

    Neurology

    2014  Volume 82, Issue 5, Page(s) 435–442

    Abstract: Objective: To test whether red blood cell (RBC) levels of marine omega-3 fatty acids measured in the Women's Health Initiative Memory Study were related to MRI brain volumes measured 8 years later.: Methods: RBC eicosapentaenoic acid (EPA), ... ...

    Abstract Objective: To test whether red blood cell (RBC) levels of marine omega-3 fatty acids measured in the Women's Health Initiative Memory Study were related to MRI brain volumes measured 8 years later.
    Methods: RBC eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA), and MRI brain volumes were assessed in 1,111 postmenopausal women from the Women's Health Initiative Memory Study. The endpoints were total brain volume and anatomical regions. Linear mixed models included multiple imputations of fatty acids and were adjusted for hormone therapy, time since randomization, demographics, intracranial volume, and cardiovascular disease risk factors.
    Results: In fully adjusted models, a 1 SD greater RBC EPA + DHA (omega-3 index) level was correlated with 2.1 cm(3) larger brain volume (p = 0.048). DHA was marginally correlated (p = 0.063) with total brain volume while EPA was less so (p = 0.11). There were no correlations between ischemic lesion volumes and EPA, DHA, or EPA + DHA. A 1 SD greater omega-3 index was correlated with greater hippocampal volume (50 mm(3), p = 0.036) in fully adjusted models. Comparing the fourth quartile vs the first quartile of the omega-3 index confirmed greater hippocampal volume (159 mm(3), p = 0.034).
    Conclusion: A higher omega-3 index was correlated with larger total normal brain volume and hippocampal volume in postmenopausal women measured 8 years later. While normal aging results in overall brain atrophy, lower omega-3 index may signal increased risk of hippocampal atrophy. Future studies should examine whether maintaining higher RBC EPA + DHA levels slows the rate of hippocampal or overall brain atrophy.
    MeSH term(s) Aged ; Aged, 80 and over ; Brain/anatomy & histology ; Brain/metabolism ; Brain/pathology ; Cohort Studies ; Docosahexaenoic Acids/blood ; Eicosapentaenoic Acid/blood ; Erythrocytes/metabolism ; Female ; Hippocampus/anatomy & histology ; Hippocampus/metabolism ; Hippocampus/pathology ; Humans ; Magnetic Resonance Imaging/trends ; Organ Size ; Postmenopause/blood ; Women's Health/trends
    Chemical Substances Docosahexaenoic Acids (25167-62-8) ; Eicosapentaenoic Acid (AAN7QOV9EA)
    Language English
    Publishing date 2014-01-22
    Publishing country United States
    Document type Journal Article ; Randomized Controlled Trial ; Research Support, Non-U.S. Gov't
    ZDB-ID 207147-2
    ISSN 1526-632X ; 0028-3878
    ISSN (online) 1526-632X
    ISSN 0028-3878
    DOI 10.1212/WNL.0000000000000080
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  9. Article ; Online: Red Blood Cell Fatty Acids and Incident Diabetes Mellitus in the Women's Health Initiative Memory Study.

    Harris, William S / Luo, Juhua / Pottala, James V / Margolis, Karen L / Espeland, Mark A / Robinson, Jennifer G

    PloS one

    2016  Volume 11, Issue 2, Page(s) e0147894

    Abstract: Context: The relations between dietary and/or circulating levels of fatty acids and the development of type 2 diabetes is unclear. Protective associations with the marine omega-3 fatty acids and linoleic acid, and with a marker of fatty acid desaturase ... ...

    Abstract Context: The relations between dietary and/or circulating levels of fatty acids and the development of type 2 diabetes is unclear. Protective associations with the marine omega-3 fatty acids and linoleic acid, and with a marker of fatty acid desaturase activity delta-5 desaturase (D5D ratio) have been reported, as have adverse relations with saturated fatty acids and D6D ratio.
    Objective: To determine the associations between red blood cell (RBC) fatty acid distributions and incident type 2 diabetes.
    Design: Prospective observational cohort study nested in the Women's Health Initiative Memory Study.
    Setting: General population.
    Subjects: Postmenopausal women.
    Main outcome measures: Self-reported incident type 2 diabetes.
    Results: There were 703 new cases of type 2 diabetes over 11 years of follow up among 6379 postmenopausal women. In the fully adjusted models, baseline RBC D5D ratio was inversely associated with incident type 2 diabetes [Hazard Ratio (HR) 0.88, 95% confidence interval (CI) 0.81-0.95) per 1 SD increase. Similarly, baseline RBC D6D ratio and palmitic acid were directly associated with incident type 2 diabetes (HR 1.14, 95% CI 1.04-1.25; and HR 1.24, 95% CI 1.14-1.35, respectively). None of these relations were materially altered by excluding incident cases in the first two years of follow-up. There were no significant relations with eicosapentaenoic, docosahexaenoic or linoleic acids.
    Conclusions: Whether altered fatty acid desaturase activities or palmitic acid levels are causally related to the development of type 2 diabetes cannot be determined from this study, but our findings suggest that proportions of certain fatty acids in RBC membranes are associated with risk for type 2 diabetes.
    MeSH term(s) Aged ; Diabetes Mellitus, Type 2/blood ; Diabetes Mellitus, Type 2/epidemiology ; Diabetes Mellitus, Type 2/pathology ; Erythrocytes/chemistry ; Erythrocytes/metabolism ; Fatty Acid Desaturases/metabolism ; Fatty Acids, Omega-3/metabolism ; Female ; Humans ; Incidence ; Linoleic Acid/metabolism ; Linoleoyl-CoA Desaturase/metabolism ; Middle Aged ; Postmenopause/blood ; Proportional Hazards Models ; Prospective Studies ; United States/epidemiology ; Women's Health
    Chemical Substances Fatty Acids, Omega-3 ; Linoleic Acid (9KJL21T0QJ) ; Fatty Acid Desaturases (EC 1.14.19.-) ; Linoleoyl-CoA Desaturase (EC 1.14.19.3) ; delta-5 fatty acid desaturase (EC 1.14.99.-)
    Language English
    Publishing date 2016-02-16
    Publishing country United States
    Document type Journal Article ; Observational Study ; Research Support, N.I.H., Extramural
    ISSN 1932-6203
    ISSN (online) 1932-6203
    DOI 10.1371/journal.pone.0147894
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Comparative effects of an acute dose of fish oil on omega-3 fatty acid levels in red blood cells versus plasma: implications for clinical utility.

    Harris, William S / Varvel, Stephen A / Pottala, James V / Warnick, G Russell / McConnell, Joseph P

    Journal of clinical lipidology

    2013  Volume 7, Issue 5, Page(s) 433–440

    Abstract: Background: Omega-3 fatty acid (n-3 FA) biostatus can be estimated with red blood cell (RBC) membranes or plasma. The matrix that exhibits the lower within-person variability and is less affected by an acute dose of n-3 FA is preferred in clinical ... ...

    Abstract Background: Omega-3 fatty acid (n-3 FA) biostatus can be estimated with red blood cell (RBC) membranes or plasma. The matrix that exhibits the lower within-person variability and is less affected by an acute dose of n-3 FA is preferred in clinical practice.
    Objective: We compared the acute effects of a large dose of n-3 FA on RBC and plasma levels of eicosapentaenoic acid (EPA) plus docosahexaenoic acid (DHA).
    Methods: Healthy volunteers (n = 20) were given 4 capsules containing 3.6 g of n-3 FA with a standardized breakfast. Blood samples were drawn at 0, 2, 4, 6, 8, and 24 hours. The EPA + DHA content of RBC membranes and plasma (the latter expressed as a percentage of total FA and as a concentration) were determined. General linear mixed models were used to analyze the mean response profiles in FA changes over time for plasma and RBCs.
    Results: At 6 hours after load, the plasma concentration of EPA + DHA had increased by 47% (95% confidence interval [CI], 24% to 73%) and the plasma EPA + DHA percentage of total FA by 19% (95% CI, 4.7% to 36%). The RBC EPA + DHA percentage of composition was unchanged [-0.6% (95% CI, -2.6% to 1.5%)]. At 24 hours, the change in both of the plasma EPA + DHA markers was 10-fold greater than that in RBCs.
    Conclusions: An acute dose of n-3 FA (eg, a meal of oily fish or fish oil supplements) taken within a day before a doctor's visit can elevate levels of EPA + DHA in plasma, whether expressed as a percentage or a concentration, but not in RBC membranes. Similar to hemoglobin A1c, which is not affected by an acute glycemic deviation, RBCs provide a more reliable estimate of a patient's chronic EPA + DHA status than does plasma.
    MeSH term(s) Adult ; Blood Chemical Analysis/methods ; Docosahexaenoic Acids/blood ; Dose-Response Relationship, Drug ; Eicosapentaenoic Acid/blood ; Erythrocytes/drug effects ; Erythrocytes/metabolism ; Female ; Fish Oils/pharmacology ; Humans ; Male ; Plasma/drug effects ; Plasma/metabolism
    Chemical Substances Fish Oils ; Docosahexaenoic Acids (25167-62-8) ; Eicosapentaenoic Acid (AAN7QOV9EA)
    Language English
    Publishing date 2013-09
    Publishing country United States
    Document type Clinical Trial ; Comparative Study ; Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2365061-8
    ISSN 1876-4789 ; 1933-2874
    ISSN (online) 1876-4789
    ISSN 1933-2874
    DOI 10.1016/j.jacl.2013.05.001
    Database MEDical Literature Analysis and Retrieval System OnLINE

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