Christine M Pfeiffer

Summary

Affiliation: Centers for Disease Control and Prevention
Country: USA

Publications

  1. ncbi request reprint Erythrocyte folate extraction and quantitative determination by liquid chromatography-tandem mass spectrometry: comparison of results with microbiologic assay
    Zia Fazili
    Inorganic Toxicology and Nutrition Branch, Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA
    Clin Chem 51:2318-25. 2005
  2. ncbi request reprint Biochemical indicators of B vitamin status in the US population after folic acid fortification: results from the National Health and Nutrition Examination Survey 1999-2000
    Christine M Pfeiffer
    National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA
    Am J Clin Nutr 82:442-50. 2005
  3. doi request reprint Dietary supplement use and smoking are important correlates of biomarkers of water-soluble vitamin status after adjusting for sociodemographic and lifestyle variables in a representative sample of U.S. adults
    Christine M Pfeiffer
    National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, USA
    J Nutr 143:957S-65S. 2013
  4. doi request reprint The CDC's Second National Report on Biochemical Indicators of Diet and Nutrition in the U.S. Population is a valuable tool for researchers and policy makers
    Christine M Pfeiffer
    National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, USA
    J Nutr 143:938S-47S. 2013
  5. doi request reprint Race-ethnicity is related to biomarkers of iron and iodine status after adjusting for sociodemographic and lifestyle variables in NHANES 2003-2006
    Christine M Pfeiffer
    National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, USA
    J Nutr 143:977S-85S. 2013
  6. pmc Estimation of trends in serum and RBC folate in the U.S. population from pre- to postfortification using assay-adjusted data from the NHANES 1988-2010
    Christine M Pfeiffer
    National Center for Environmental Health, CDC, Atlanta, GA, USA
    J Nutr 142:886-93. 2012
  7. pmc Changes in measurement procedure from a radioassay to a microbiologic assay necessitate adjustment of serum and RBC folate concentrations in the U.S. population from the NHANES 1988-2010
    Christine M Pfeiffer
    National Center for Environmental Health, CDC, Atlanta, GA, USA
    J Nutr 142:894-900. 2012
  8. ncbi request reprint Determination of folate vitamers in human serum by stable-isotope-dilution tandem mass spectrometry and comparison with radioassay and microbiologic assay
    Christine M Pfeiffer
    National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA
    Clin Chem 50:423-32. 2004
  9. ncbi request reprint Evaluation of an automated soluble transferrin receptor (sTfR) assay on the Roche Hitachi analyzer and its comparison to two ELISA assays
    Christine M Pfeiffer
    Centers for Disease Control and Prevention, National Center for Environmental Health, Atlanta, GA 30345, USA
    Clin Chim Acta 382:112-6. 2007
  10. doi request reprint Trends in circulating concentrations of total homocysteine among US adolescents and adults: findings from the 1991-1994 and 1999-2004 National Health and Nutrition Examination Surveys
    Christine M Pfeiffer
    National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA
    Clin Chem 54:801-13. 2008

Detail Information

Publications64

  1. ncbi request reprint Erythrocyte folate extraction and quantitative determination by liquid chromatography-tandem mass spectrometry: comparison of results with microbiologic assay
    Zia Fazili
    Inorganic Toxicology and Nutrition Branch, Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA
    Clin Chem 51:2318-25. 2005
    ..Erythrocyte folate analysis is an important diagnostic tool to establish folate status or screen for folate deficiency...
  2. ncbi request reprint Biochemical indicators of B vitamin status in the US population after folic acid fortification: results from the National Health and Nutrition Examination Survey 1999-2000
    Christine M Pfeiffer
    National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA
    Am J Clin Nutr 82:442-50. 2005
    ..Mandatory folic acid fortification of cereal-grain products was introduced in the United States in 1998 to decrease the risk that women will have children with neural tube defects...
  3. doi request reprint Dietary supplement use and smoking are important correlates of biomarkers of water-soluble vitamin status after adjusting for sociodemographic and lifestyle variables in a representative sample of U.S. adults
    Christine M Pfeiffer
    National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, USA
    J Nutr 143:957S-65S. 2013
    ..Supplement use and smoking were important correlates of biomarkers of WSV status...
  4. doi request reprint The CDC's Second National Report on Biochemical Indicators of Diet and Nutrition in the U.S. Population is a valuable tool for researchers and policy makers
    Christine M Pfeiffer
    National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, USA
    J Nutr 143:938S-47S. 2013
    ..Tabulation and graphical presentation of NHANES data in the Second Nutrition Report benefits those organizations involved in developing and evaluating nutrition policy...
  5. doi request reprint Race-ethnicity is related to biomarkers of iron and iodine status after adjusting for sociodemographic and lifestyle variables in NHANES 2003-2006
    Christine M Pfeiffer
    National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, USA
    J Nutr 143:977S-85S. 2013
    ....
  6. pmc Estimation of trends in serum and RBC folate in the U.S. population from pre- to postfortification using assay-adjusted data from the NHANES 1988-2010
    Christine M Pfeiffer
    National Center for Environmental Health, CDC, Atlanta, GA, USA
    J Nutr 142:886-93. 2012
    ..The MBA-equivalent pre- and postfortification reference concentrations will inform countries that plan folic acid fortification or that need to evaluate its impact...
  7. pmc Changes in measurement procedure from a radioassay to a microbiologic assay necessitate adjustment of serum and RBC folate concentrations in the U.S. population from the NHANES 1988-2010
    Christine M Pfeiffer
    National Center for Environmental Health, CDC, Atlanta, GA, USA
    J Nutr 142:894-900. 2012
    ..S. population by using results that are equivalent to the MBA. This information will be useful to public health officials in the United States who are dealing with folic acid fortification issues...
  8. ncbi request reprint Determination of folate vitamers in human serum by stable-isotope-dilution tandem mass spectrometry and comparison with radioassay and microbiologic assay
    Christine M Pfeiffer
    National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA
    Clin Chem 50:423-32. 2004
    ....
  9. ncbi request reprint Evaluation of an automated soluble transferrin receptor (sTfR) assay on the Roche Hitachi analyzer and its comparison to two ELISA assays
    Christine M Pfeiffer
    Centers for Disease Control and Prevention, National Center for Environmental Health, Atlanta, GA 30345, USA
    Clin Chim Acta 382:112-6. 2007
    ..Soluble transferrin receptor (sTfR) assays are currently not standardized. This hinders data comparison between studies and also affects the use of a recently proposed model to estimate body iron...
  10. doi request reprint Trends in circulating concentrations of total homocysteine among US adolescents and adults: findings from the 1991-1994 and 1999-2004 National Health and Nutrition Examination Surveys
    Christine M Pfeiffer
    National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA
    Clin Chem 54:801-13. 2008
    ..Such an analysis of these data could supplement current knowledge regarding whether the US folic acid fortification program has modified national plasma tHcy concentrations...
  11. pmc Comparison of serum and red blood cell folate microbiologic assays for national population surveys
    Christine M Pfeiffer
    National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA
    J Nutr 141:1402-9. 2011
    ..These findings indicate how assay variations influence MA folate results and how those variations can affect population data. To ensure data comparability, better assay harmonization is needed...
  12. ncbi request reprint Trends in blood folate and vitamin B-12 concentrations in the United States, 1988 2004
    Christine M Pfeiffer
    National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA
    Am J Clin Nutr 86:718-27. 2007
    ..Monitoring the folate status of US population groups over time has been a public health priority for the past 2 decades, and the focus has been enhanced since the implementation of a folic acid fortification program in the mid-1990s...
  13. doi request reprint Regression modeling plan for 29 biochemical indicators of diet and nutrition measured in NHANES 2003-2006
    Maya R Sternberg
    National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, USA
    J Nutr 143:948S-56S. 2013
    ..These articles are intended to provide a foundation to researchers to help them generate hypotheses for future studies or data analyses and/or develop predictive regression models using the wealth of NHANES data...
  14. doi request reprint Race-ethnicity is a strong correlate of circulating fat-soluble nutrient concentrations in a representative sample of the U.S. population
    Rosemary L Schleicher
    Nutritional Biomarkers Branch, Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, USA
    J Nutr 143:966S-76S. 2013
    ..Of the sociodemographic and lifestyle variables examined, with or without lipid adjustment, most fat-soluble nutrient biomarkers were significantly associated with race-ethnicity...
  15. pmc Validity of predictive equations for 24-h urinary sodium excretion in adults aged 18-39 y
    Mary E Cogswell
    Division for Heart Disease and Stroke Prevention MEC and CDG and the Division of Nutrition, Physical Activity and Obesity CGP, National Center for Chronic Disease Prevention and Health Promotion, and the Division of Laboratory Sciences, National Center for Environmental Health CMP and KLC, CDC, Atlanta, GA the Division of Health and Nutrition Examination Surveys, National Center for Health Statistics, CDC, Hyattsville, MD C YW and T CC the National Heart, Lung, and Blood Institute CML and Office of Dietary Supplements CAS and CTS, NIH, Bethesda, MD the Department of Statistics, Iowa State University, Ames, IA ALC the Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL KL and the Department of Epidemiology and Public Health, Imperial College of London and Medical Research Council Health Protection Agency, Centre for Environment and Health, London, United Kingdom PE
    Am J Clin Nutr 98:1502-13. 2013
    ..Collecting a 24-h urine sample is recommended for monitoring the mean population sodium intake, but implementation can be difficult...
  16. doi request reprint Selected physiologic variables are weakly to moderately associated with 29 biomarkers of diet and nutrition, NHANES 2003-2006
    Bridgette M H Haynes
    National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, USA
    J Nutr 143:1001S-10S. 2013
    ..The analysis serves as a useful basis for more complex future research...
  17. doi request reprint Sociodemographic and lifestyle variables are compound- and class-specific correlates of urine phytoestrogen concentrations in the U.S. population
    Michael E Rybak
    National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, USA
    J Nutr 143:986S-94S. 2013
    ..Overall, we found that relationships between sociodemographic and lifestyle variables and urine phytoestrogen concentration were highly compound and class specific...
  18. pmc Changes in the concentrations of biochemical indicators of diet and nutritional status of pregnant women across pregnancy trimesters in Trujillo, Peru, 2004-2005
    D Kevin Horton
    Agency for Toxic Substances and Disease Registry, Atlanta, GA, USA
    Nutr J 12:80. 2013
    ..Although, biochemical indicators of diet and nutrition are useful to assess nutritional status, few studies have examined such indicators throughout pregnancy in women in developing countries...
  19. doi request reprint Among 10 sociodemographic and lifestyle variables, smoking is strongly associated with biomarkers of acrylamide exposure in a representative sample of the U.S. Population
    Hubert W Vesper
    National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, USA
    J Nutr 143:995S-1000S. 2013
    ..Our findings will be useful in the design and analysis of future studies that assess and evaluate exposure to acrylamide and its metabolism to glycidamide...
  20. doi request reprint Contributions of enriched cereal-grain products, ready-to-eat cereals, and supplements to folic acid and vitamin B-12 usual intake and folate and vitamin B-12 status in US children: National Health and Nutrition Examination Survey (NHANES), 2003-2006
    Lorraine F Yeung
    Division of Birth Defects and Developmental Disabilities, National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, Atlanta, GA, USA
    Am J Clin Nutr 93:172-85. 2011
    ..US children consume folic acid from multiple sources. These sources may contribute differently to usual intakes above the age-specific tolerable upper intake level (UL) for folic acid and to folate and vitamin B-12 status...
  21. ncbi request reprint Urine sodium excretion increased slightly among U.S. adults between 1988 and 2010
    Christine M Pfeiffer
    National Center for Environmental Health, CDC, Atlanta, GA
    J Nutr 144:698-705. 2014
    ..S. adults over the past 2 decades, and this increase may be explained by a shift in the distribution of BMI. ..
  22. pmc Serum 25-hydroxyvitamin D status of the US population: 1988-1994 compared with 2000-2004
    Anne C Looker
    National Center for Health Statistics, Centers for Disease Control and Prevention, Hyattsville, MD 20782, USA
    Am J Clin Nutr 88:1519-27. 2008
    ..Changes in serum 25-hydroxyvitamin D [25(OH)D] concentrations in the US population have not been described...
  23. doi request reprint Serum soluble transferrin receptor concentrations in US preschool children and non-pregnant women of childbearing age from the National Health and Nutrition Examination Survey 2003-2010
    Zuguo Mei
    National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention CDC, Atlanta, GA, USA
    Clin Chim Acta 413:1479-84. 2012
    ..The lack of assay standardization and of representative data on the distribution of sTfR in at-risk populations currently limits its utility...
  24. doi request reprint Assessment of iron status in US pregnant women from the National Health and Nutrition Examination Survey (NHANES), 1999-2006
    Zuguo Mei
    National Centers for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, GA 30341 3724, USA
    Am J Clin Nutr 93:1312-20. 2011
    ..Total body iron calculated from serum ferritin and soluble transferrin receptor concentrations allows for the evaluation of the full range of iron status...
  25. doi request reprint Does obesity modify the association of supplemental folic acid with folate status among nonpregnant women of childbearing age in the United States?
    Sarah C Tinker
    National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, Atlanta, GA, USA
    Birth Defects Res A Clin Mol Teratol 94:749-55. 2012
    ..It is not clear whether the amount of folic acid required by obese women to protect against NTDs is the same as that for nonobese women...
  26. doi request reprint Folic acid source, usual intake, and folate and vitamin B-12 status in US adults: National Health and Nutrition Examination Survey (NHANES) 2003-2006
    Quanhe Yang
    Office of Public Health Genomics, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA
    Am J Clin Nutr 91:64-72. 2010
    ..US adults have access to multiple sources of folic acid. The contribution of these sources to usual intakes above the tolerable upper intake level (UL) (1000 microg/d) and to folate and vitamin B-12 status is unknown...
  27. pmc Assessing U.S. sodium intake through dietary data and urine biomarkers
    Mary E Cogswell
    Centers for Disease Control and Prevention, Atlanta, GA
    Adv Nutr 4:560-2. 2013
    ..Estimates indicated United States sodium intake remains high. ..
  28. ncbi request reprint Urinary excretion of sodium, potassium, and chloride, but not iodine, varies by timing of collection in a 24-hour calibration study
    Chia Yih Wang
    Division of Health and Nutrition Examination Surveys, National Center for Health Statistics, Centers for Disease Control and Prevention, Hyattsville, MD, USA
    J Nutr 143:1276-82. 2013
    ..The observed day-to-day and diurnal variations in sodium excretion illustrate the importance of accounting for these factors when developing calibration equations from this study. ..
  29. ncbi request reprint Influence of 5,10-methylenetetrahydrofolate reductase polymorphism on whole-blood folate concentrations measured by LC-MS/MS, microbiologic assay, and bio-rad radioassay
    Zia Fazili
    Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Highway NE, Atlanta, GA 30345, USA
    Clin Chem 54:197-201. 2008
    ....
  30. pmc Zinc and iron deficiency and their interrelations in low-income African American and Hispanic children in Atlanta
    Conrad R Cole
    Department of Pediatrics, Emory University, Atlanta, GA 30322, USA
    Am J Clin Nutr 91:1027-34. 2010
    ..Information about the zinc status of low-income minority children in the United States is lacking...
  31. doi request reprint Accounting for an isobaric interference allows correct determination of folate vitamers in serum by isotope dilution-liquid chromatography-tandem MS
    Zia Fazili
    National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, USA
    J Nutr 143:108-13. 2013
    ..Including measurements of MeFox and 5-formylTHF along with the other folate vitamers will enhance assessments of the association between biologically active folate and health effects...
  32. doi request reprint Assessment of iron deficiency in US preschool children and nonpregnant females of childbearing age: National Health and Nutrition Examination Survey 2003-2006
    Mary E Cogswell
    Centers for Disease Control and Prevention, National Center for Chronic Disease Prevention and Health Promotion, Atlanta, GA, USA
    Am J Clin Nutr 89:1334-42. 2009
    ..A new index to determine body iron promises a simpler approach to monitoring iron deficiency (ID) prevalence...
  33. doi request reprint Serum concentrations of an aflatoxin-albumin adduct in the National Health and Nutrition Examination Survey (NHANES) 1999-2000
    Rosemary L Schleicher
    Nutritional Biomarkers Branch, Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, United States
    Clin Chim Acta 423:46-50. 2013
    ....
  34. doi request reprint Assessing the influence of 5,10-methylenetetrahydrofolate reductase polymorphism on folate stability during long-term frozen storage, thawing, and repeated freeze/thawing of whole blood
    Zia Fazili
    Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341, United States
    Clin Chim Acta 413:966-72. 2012
    ..Limited information is available on folate stability, particularly vitamer stability by 5,10-methylenetetrahydrofolate reductase (MTHFR) C677T genotype, during frozen storage, thawing, and repeated freeze/thawing (F/T) of whole blood (WB)...
  35. ncbi request reprint Comparison of serum folate species analyzed by LC-MS/MS with total folate measured by microbiologic assay and Bio-Rad radioassay
    Zia Fazili
    Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia 30345, USA
    Clin Chem 53:781-4. 2007
    ..Liquid chromatography-tandem mass spectrometry (LC-MS/MS) or a microbiologic assay (MA) will be used in the future...
  36. ncbi request reprint Measurement of folates in serum and conventionally prepared whole blood lysates: application of an automated 96-well plate isotope-dilution tandem mass spectrometry method
    Zia Fazili
    Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA
    Clin Chem 50:2378-81. 2004
  37. doi request reprint Effects of delayed sample processing and freezing on serum concentrations of selected nutritional indicators
    Bakary S Drammeh
    National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA
    Clin Chem 54:1883-91. 2008
    ..We used samples from US volunteers to investigate the effects of delayed whole blood (WB) processing and delayed freezing of serum on selected nutritional indicators...
  38. doi request reprint Isotope dilution ultra performance liquid chromatography-tandem mass spectrometry method for simultaneous measurement of 25-hydroxyvitamin D2, 25-hydroxyvitamin D3 and 3-epi-25-hydroxyvitamin D3 in human serum
    Rosemary L Schleicher
    Centers for Disease Control and Prevention, NCEH DLS NBB, Atlanta, GA 30341, United States
    Clin Chim Acta 412:1594-9. 2011
    ....
  39. ncbi request reprint Clinical vitamin B6 analysis: an interlaboratory comparison of pyridoxal 5'-phosphate measurements in serum
    Michael E Rybak
    Inorganic Toxicology and Nutrition Branch, Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA
    Clin Chem 51:1223-31. 2005
    ..Because a true reference method and certified reference materials are lacking, little is known about the relative analytical performance of clinical vitamin B(6) assays...
  40. doi request reprint A high-throughput LC-MS/MS method suitable for population biomonitoring measures five serum folate vitamers and one oxidation product
    Zia Fazili
    Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA
    Anal Bioanal Chem 405:4549-60. 2013
    ..With this improved LC-MS/MS method, 96 samples can be processed in ~2 h, and all relevant folate forms can be accurately measured using a small serum volume...
  41. ncbi request reprint Serum iron and iron-binding capacity: a round-robin interlaboratory comparison study
    Heidi Michels Blanck
    Division of Nutrition and Physical Activity, National Center for Chronic Disease Prevention and Health Promotion, National Center for Chronic Disease Prevention and Health Promotion, CDC, Atlanta, GA 30341, USA
    Clin Chem 49:1672-5. 2003
  42. doi request reprint The CDC VITAL-EQA program, external quality assurance for serum retinol, 2003-2006
    Bridgette M H Haynes
    Battelle, Atlanta, GA 30341, United States U S Centers for Disease Control and Prevention, Atlanta, GA 30341, United States
    Clin Chim Acta 390:90-6. 2008
    ....
  43. ncbi request reprint Analysis of aflatoxin B1-lysine adduct in serum using isotope-dilution liquid chromatography/tandem mass spectrometry
    Leslie F McCoy
    Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA
    Rapid Commun Mass Spectrom 19:2203-10. 2005
    ..4% for B1-Lys and 85.4 +/- 12.4% for the internal standard were based on the full extraction and reconstitution processes. The method can be used to quantitate B1-Lys at the 0.5 pg/mg albumin level and is suitable for routine analysis...
  44. ncbi request reprint Clinical analysis of vitamin B(6): determination of pyridoxal 5'-phosphate and 4-pyridoxic acid in human serum by reversed-phase high-performance liquid chromatography with chlorite postcolumn derivatization
    Michael E Rybak
    Inorganic Toxicology Nutrition Branch, Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341 3724, USA
    Anal Biochem 333:336-44. 2004
    ..The high sensitivity, precision, and throughput of this method, combined with its minimal serum specimen (150 microl) and sample injection (10 microl) volume requirements, make it well suited for routine clinical vitamin B(6) analysis...
  45. doi request reprint Phytoestrogen biomonitoring: an extractionless LC-MS/MS method for measuring urinary isoflavones and lignans by use of atmospheric pressure photoionization (APPI)
    Daniel L Parker
    U S Centers for Disease Control and Prevention, National Center for Environmental Health, 4770 Buford Hwy, MS F 55, Atlanta, GA 30341, USA
    Anal Bioanal Chem 402:1123-36. 2012
    ..This work is the first ever report of using APPI for the LC-MS/MS determination of these compounds in urine. It is also the first method of its kind to do so without any need for analyte extraction or preconcentration prior to analysis...
  46. doi request reprint Measurement of 25-hydroxyvitamin D3 (25OHD3) and 25-hydroxyvitamin D2 (25OHD2) in human serum using liquid chromatography-tandem mass spectrometry and its comparison to a radioimmunoassay method
    Huiping Chen
    Centers for Disease Control and Prevention, Atlanta, GA, USA
    Clin Chim Acta 391:6-12. 2008
    ..We developed a liquid chromatography-tandem mass spectrometry (LC-MS/MS) method to measure 25OHD(3) and 25OHD(2) in human serum and compared it to the traditionally used DiaSorin radioimmunoassay (RIA)...
  47. doi request reprint A simplified protein precipitation and filtration procedure for determining serum vitamin B6 by high-performance liquid chromatography
    Michael E Rybak
    Nutritional Biomarkers Branch, Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA
    Anal Biochem 388:175-7. 2009
    ..3 (-2.2, -0.5)% difference in PLP values and a -6.2 (-7.3, -5.2)% difference in 4PA values using the simplified sample preparation. These deviations were found to be well within allowable biases on the basis of biologic variation...
  48. ncbi request reprint Determination of urinary phytoestrogens by HPLC-MS/MS: a comparison of atmospheric pressure chemical ionization (APCI) and electrospray ionization (ESI)
    Michael E Rybak
    Centers for Disease Control and Prevention, National Center for Environmental Health, Atlanta, GA 30341, USA
    J Chromatogr B Analyt Technol Biomed Life Sci 861:145-50. 2008
    ..Baring significant factors arising from differences in ionization source design, these observations suggest that ESI is more appropriate for urinary biomonitoring of these compounds by LC-MS/MS...
  49. ncbi request reprint Comparing the ESA HPLC total homocysteine assay with electrochemical detection to the CDC in-house HPLC assay with fluorescence detection
    Ming Zhang
    Centers for Disease Control and Prevention, 4770 Buford Hwy NE, Atlanta, GA 30341 3724, USA
    Clin Chim Acta 340:195-200. 2004
    ..We evaluated this method and compared it with the CDC HPLC assay with fluorescence detection (FD)...
  50. ncbi request reprint Relation between the response to iron supplementation and sickle cell hemoglobin phenotype in preschool children in western Kenya
    Dianne J Terlouw
    Division of Parasitic Diseases, National Center for Infectious Diseases, Atlanta, GA, USA
    Am J Clin Nutr 79:466-72. 2004
    ..It is not known whether a similar interaction exists in children...
  51. ncbi request reprint Determination of urine caffeine and its metabolites by use of high-performance liquid chromatography-tandem mass spectrometry: estimating dietary caffeine exposure and metabolic phenotyping in population studies
    Michael E Rybak
    U S Centers for Disease Control and Prevention, National Center for Environmental Health, 4770 Buford Highway, MS F 55, Atlanta, GA, 30341, USA
    Anal Bioanal Chem 406:771-84. 2014
    ....
  52. ncbi request reprint Fast and reliable salt iodine measurement: evaluation of the WYD Iodine Checker in comparison with iodometric titration
    Tracy Dearth-Wesley
    National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
    Food Nutr Bull 25:130-6. 2004
    ..We recommend further testing to examine the field performance of the WYD Iodine Checker when measuring iodate salt samples...
  53. pmc Blood levels of folate at birth and risk of childhood leukemia
    Anand P Chokkalingam
    UC Berkeley School of Public Health, 1995 University Ave, Ste 460, Berkeley CA 94704, USA
    Cancer Epidemiol Biomarkers Prev 22:1088-94. 2013
    ..Previous case-control studies examining the association between risk of childhood acute lymphoblastic leukemia (ALL) and mothers' self-reported folate intake and supplementation have been inconclusive...
  54. ncbi request reprint Combined measurement of ferritin, soluble transferrin receptor, retinol binding protein, and C-reactive protein by an inexpensive, sensitive, and simple sandwich enzyme-linked immunosorbent assay technique
    Juergen G Erhardt
    SEAMEO, Regional Center for Community Nutrition, University of Indonesia, Salemba Raya 6, Jakarta 10430, Indonesia
    J Nutr 134:3127-32. 2004
    ..Due to the low cost, high throughput, and comparability to traditional tests, this procedure has several advantages for assessing VA and iron status in population surveys...
  55. doi request reprint Commutability of NIST SRM 1955 Homocysteine and Folate in Frozen Human Serum with selected total homocysteine immunoassays and enzymatic assays
    Bryant C Nelson
    National Institute of Standards and Technology, Biochemical Science Division, Gaithersburg, MD 20899 0001, USA
    Clin Chim Acta 395:99-105. 2008
    ..NIST has performed an international, interlaboratory assessment of SRM 1955 commutability; results are reported for tHcy only...
  56. ncbi request reprint Solid-phase extraction-electrospray ionization mass spectrometry for the quantification of folate in human plasma or serum
    Bryant C Nelson
    Analytical Chemistry Division, National Institute of Standards and Technology, Gaithersburg, MD 20899 0001, USA
    Anal Biochem 325:41-51. 2004
    ..On the basis of the experimental data presented in this report, it is suggested that both methods have the capacity to serve as potential reference methods for the quantification of circulating 5MT in plasma or serum...
  57. ncbi request reprint Homocysteine and vitamin B(12) concentrations and mortality rates in type 2 diabetes
    Helen C Looker
    National Institute of Diabetes and Digestive and Kidney Diseases, Phoenix, AZ, USA
    Diabetes Metab Res Rev 23:193-201. 2007
    ..To assess the role of homocysteine as a risk factor for mortality in diabetic subjects...
  58. ncbi request reprint Development and evaluation of an isotope dilution LC/MS method for the determination of total homocysteine in human plasma
    Bryant C Nelson
    Genzyme Corporation, Framingham, MA 01701, USA
    Anal Chem 75:775-84. 2003
    ..LC/MS performed well in relation to the other homocysteine methods in terms of its capability to accurately quantify plasma homocysteine over the normal range (5-15 micromol/L)...
  59. pmc Pilot study of urinary biomarkers of phytoestrogens, phthalates, and phenols in girls
    Mary S Wolff
    Mount Sinai School of Medicine, Division of Environmental Health Sciences, Department of Community and Preventive Medicine, New York, New York 10029, USA
    Environ Health Perspect 115:116-21. 2007
    ..S. children using exposure biomarkers in urine. However, little is known about their variation by race, age, sex, and geography, and no data exist for newly developed biomarkers...
  60. ncbi request reprint Development of a new standard reference material: SRM 1955 (homocysteine and folate in human serum)
    Mary B Satterfield
    Analytical Chemistry Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
    Anal Bioanal Chem 385:612-22. 2006
    ..Use of the new SRM should improve clinical measurements and will permit traceability to internationally recognized certified reference materials, as described by European Directive 98/79/EC on in vitro diagnostic medical devices...
  61. ncbi request reprint Comparison of isotope dilution mass spectrometry methods for the determination of total homocysteine in plasma and serum
    Mary B Satterfield
    National Institute of Standards and Technology, Analytical Chemistry Division, Gaithersburg, Maryland 20899 0001, USA
    Anal Chem 75:4631-8. 2003
    ..On the basis of the excellent precision and close agreement of the mass spectrometric (MS) methods, the MS-based methods will be used for certification of a serum-based SRM for homocysteine and folates...
  62. ncbi request reprint Affinity extraction combined with stable isotope dilution LC/MS for the determination of 5-methyltetrahydrofolate in human plasma
    Bryant C Nelson
    Analytical Chemistry Division, National Institute of Standards and Technology, Gaithersburg, MD 20899 0001, USA
    Anal Biochem 313:117-27. 2003
    ..Reasons for the discordancy are theorized, but it is clear that there exists an urgent need for clinical reference materials containing certified folate levels...
  63. doi request reprint Iron-status indicators
    Sarah E Cusick
    Pediatrics 121:651-2; author reply 652. 2008