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ANTONE OPEKUN

TitleAssociate Professor
InstitutionBaylor College of Medicine
DepartmentDepartment of Medicine
AddressOne Baylor Plaza
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    Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Faculty can login to make corrections and additions.
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    PMC Citations indicate the number of times the publication was cited by articles in PubMed Central, and the Altmetric score represents citations in news articles and social media. (Note that publications are often cited in additional ways that are not shown here.) Fields are based on how the National Library of Medicine (NLM) classifies the publication's journal and might not represent the specific topic of the publication. Translation tags are based on the publication type and the MeSH terms NLM assigns to the publication. Some publications (especially newer ones and publications not in PubMed) might not yet be assigned Field or Translation tags.) Click a Field or Translation tag to filter the publications.
    1. Atmar RL, Neill FH, Hayes NM, Opekun AR, Graham DY, Estes MK, Ramani S. Lack of Detection of Norwalk Virus in Saliva Samples From a Controlled Human Infection Model. Open Forum Infect Dis. 2024 Nov; 11(11):ofae652. PMID: 39540122; PMCID: PMC11558451.
      Citations:    
    2. Ramani S, Javornik Cregeen SJ, Surathu A, Neill FH, Muzny DM, Doddapaneni H, Menon VK, Hoffman KL, Ross MC, Metcalf G, Opekun AR, Graham DY, Gibbs RA, Petrosino JF, Estes MK, Atmar RL. INTRA- AND INTER-HOST EVOLUTION OF HUMAN NOROVIRUS IN HEALTHY ADULTS. bioRxiv. 2024 Sep 05. PMID: 39282326; PMCID: PMC11398385.
      Citations:    
    3. Thompson JS, Reddy S, Shaw A, Opekun AR, Kellermayer R. Pediatric Participation in Biobanking Related to Inflammatory Bowel Diseases. Clin Pediatr (Phila). 2024 May 20; 99228241254893. PMID: 38767312.
      Citations:    Fields:    
    4. Patel H, Harris RA, Qian JH, Oezguen N, Watson A, Szigeti RG, Cho S, Ruan W, Britto S, Opekun A, Preidis G, Kellermayer R, Kellermayer R. Genetic Variation Between Small Bowel and Colon-Predominant Crohn's Disease. Cell Mol Gastroenterol Hepatol. 2024; 17(6):1069-1071. PMID: 38369131; PMCID: PMC11127623.
      Citations:    Fields:    Translation:Humans
    5. Al Lami Z, Kurtca M, Atique MU, Opekun AR, Siam MS, Jalal PK, Najafi B, Devaraj S, Mindikoglu AL. Dawn-to-dusk dry fasting decreases circulating inflammatory cytokines in subjects with increased body mass index. Metabol Open. 2024 Mar; 21:100274. PMID: 38455231; PMCID: PMC10918425.
      Citations: 1     
    6. Ciocca ET, Staggers KA, Carey J, Opekun AR, Hollinger FB, Keitel WA, Atmar RL, El Sahly HM, Whitaker JA. Delays in Hepatitis A vaccination in people with HIV in Houston, Texas between 2010 and 2018. Vaccine X. 2024 Jan; 16:100422. PMID: 38192618; PMCID: PMC10772366.
      Citations:    
    7. Ge Y, Billings WZ, Opekun A, Estes M, Graham D, Leon J, Koelle K, Shen Y, Atmar R, Lopman B, Handel A. Effect of Norovirus Inoculum Dose on Virus Kinetics, Shedding, and Symptoms. Emerg Infect Dis. 2023 07; 29(7):1349-1356. PMID: 37347494; PMCID: PMC10310361.
      Citations: 3     Fields:    Translation:HumansCells
    8. Otley A, Rosh JR, Harris RA, Bush AH, Eagar TN, Qian J, Greenwood MP, Opekun AR, Baldassano R, Guthery SL, Noe JD, Kugathasan S, Kellermayer R. Exome Sequencing Implicates DGKZ , ESRRA , and GXYLT1 for Modulating Granuloma Formation in Crohn Disease. J Pediatr Gastroenterol Nutr. 2023 09 01; 77(3):354-357. PMID: 37347142; PMCID: PMC10528115.
      Citations:    Fields:    Translation:Humans
    9. Shaiken TE, Grimm SL, Siam M, Williams A, Rezaeian AH, Kraushaar D, Ricco E, Robertson MJ, Coarfa C, Jain A, Malovannaya A, Stossi F, Opekun AR, Price AP, Dubrulle J. Transcriptome, proteome, and protein synthesis within the intracellular cytomatrix. iScience. 2023 Feb 17; 26(2):105965. PMID: 36824274; PMCID: PMC9941065.
      Citations:    
    10. Mindikoglu AL, Park J, Opekun AR, Abdulsada MM, Wilhelm ZR, Jalal PK, Devaraj S, Jung SY. Dawn-to-dusk dry fasting induces anti-atherosclerotic, anti-inflammatory, and anti-tumorigenic proteome in peripheral blood mononuclear cells in subjects with metabolic syndrome. Metabol Open. 2022 Dec; 16:100214. PMID: 36506940; PMCID: PMC9731888.
      Citations: 1     
    11. Wolfson S, Wilhelm Z, Opekun AR, Orth R, Shulman RJ, Chumpitazi BP. Clinical Characterization of Pediatric Gastroparesis Using a Four-hour Gastric Emptying Scintigraphy Standard. J Pediatr Gastroenterol Nutr. 2021 06 01; 72(6):848-853. PMID: 33605658; PMCID: PMC8486321.
      Citations: 2     Fields:    Translation:Humans
    12. Shaiken TE, Opekun AR. Author Correction: Dissecting the cell to nucleus, perinucleus and cytosol. Sci Rep. 2021 Apr 22; 11(1):9178. PMID: 33888848; PMCID: PMC8062662.
      Citations:    Fields:    
    13. Abdulsada MM, Wilhelm ZR, Opekun AR, Devaraj S, Jalal PK, Mindikoglu AL. The effect of four-week intermittent fasting from dawn to sunset on circulating brain-derived neurotrophic factor levels in subjects with metabolic syndrome and healthy subjects. Metabol Open. 2021 Mar; 9:100070. PMID: 33376976; PMCID: PMC7758552.
      Citations: 1     
    14. Mindikoglu AL, Abdulsada MM, Jain A, Jalal PK, Devaraj S, Wilhelm ZR, Opekun AR, Jung SY. Intermittent fasting from dawn to sunset for four consecutive weeks induces anticancer serum proteome response and improves metabolic syndrome. Sci Rep. 2020 10 27; 10(1):18341. PMID: 33110154; PMCID: PMC7592042.
      Citations: 5     Fields:    Translation:HumansCTClinical Trials
    15. Opekun AR, Zierold C, Rode A, Blocki FA, Fiorini G, Saracino IM, Vaira D, Sutton FM. Clinical Performance of the Automated LIAISON? Meridian H. pylori SA Stool Antigen Test. Biomed Res Int. 2020; 2020:7189519. PMID: 32280698; PMCID: PMC7114771.
      Citations: 4     Fields:    Translation:HumansCells
    16. Opekun AR, Chumpitazi BP, Abdulsada MM, Nichols BL. Routine disaccharidase testing: are we there yet? Curr Opin Gastroenterol. 2020 03; 36(2):101-109. PMID: 31990709; PMCID: PMC7393638.
      Citations:    Fields:    Translation:HumansCells
    17. Mindikoglu AL, Abdulsada MM, Jain A, Choi JM, Jalal PK, Devaraj S, Mezzari MP, Petrosino JF, Opekun AR, Jung SY. Intermittent fasting from dawn to sunset for 30 consecutive days is associated with anticancer proteomic signature and upregulates key regulatory proteins of glucose and lipid metabolism, circadian clock, DNA repair, cytoskeleton remodeling, immune system and cognitive function in healthy subjects. J Proteomics. 2020 04 15; 217:103645. PMID: 31927066; PMCID: PMC7429999.
      Citations: 11     Fields:    Translation:HumansAnimalsCells
    18. Mindikoglu AL, Coarfa C, Opekun AR, Shah VH, Arab JP, Lazaridis KN, Putluri N, Ambati CR, Robertson MJ, Devaraj S, Jalal PK, Rana A, Goss JA, Dowling TC, Weir MR, Seliger SL, Raufman JP, Bernard DW, Vierling JM. Metabolomic biomarkers are associated with mortality in patients with cirrhosis caused by primary biliary cholangitis or primary sclerosing cholangitis. Future Sci OA. 2019 Dec 17; 6(2):FSO441. PMID: 32025330; PMCID: PMC6997913.
      Citations:    
    19. Estes MK, Ettayebi K, Tenge VR, Murakami K, Karandikar U, Lin SC, Ayyar BV, Cortes-Penfield NW, Haga K, Neill FH, Opekun AR, Broughman JR, Zeng XL, Blutt SE, Crawford SE, Ramani S, Graham DY, Atmar RL. Human Norovirus Cultivation in Nontransformed Stem Cell-Derived Human Intestinal Enteroid Cultures: Success and Challenges. Viruses. 2019 07 11; 11(7). PMID: 31336765; PMCID: PMC6669637.
      Citations: 24     Fields:    Translation:HumansCells
    20. Graham DY, Ketwaroo GA, Money ME, Opekun AR. Enzyme therapy for functional bowel disease-like post-prandial distress. J Dig Dis. 2018 Nov; 19(11):650-656. PMID: 30101562; PMCID: PMC6910206.
      Citations: 2     Fields:    Translation:Humans
    21. Chumpitazi BP, Robayo-Torres CC, Tsai CM, Opekun AR, Baker SS, Nichols BL, Gilger MA. Demographic and Clinical Correlates of Mucosal Disaccharidase Deficiencies in Children With Functional Dyspepsia. J Pediatr Gastroenterol Nutr. 2018 Jun; 66 Suppl 3:S52-S55. PMID: 29762379; PMCID: PMC5957288.
      Citations: 7     Fields:    Translation:Humans
    22. Robayo-Torres CC, Diaz-Sotomayor M, Hamaker BR, Baker SS, Chumpitazi BP, Opekun AR, Nichols BL. 13C-Labeled-Starch Breath Test in Congenital Sucrase-isomaltase Deficiency. J Pediatr Gastroenterol Nutr. 2018 Jun; 66 Suppl 3:S61-S64. PMID: 29762381; PMCID: PMC5957291.
      Citations: 4     Fields:    Translation:Humans
    23. Opekun AR, Gonzales SA, Al-Saadi MA, Graham DY. Brief report: Lactobacillus bulgaricus GLB44 (Proviotic? ) plus esomeprazole for Helicobacter pylori eradication: A pilot study. Helicobacter. 2018 Apr; 23(2):e12476. PMID: 29504209; PMCID: PMC6913170.
      Citations:    Fields:    Translation:HumansCells
    24. Mindikoglu AL, Opekun AR, Mitch WE, Magder LS, Christenson RH, Dowling TC, Weir MR, Seliger SL, Howell CD, Raufman JP, Rana A, Goss JA, Khaderi SA, Vierling JM. Cystatin C Is a Gender-Neutral Glomerular Filtration Rate Biomarker in Patients with Cirrhosis. Dig Dis Sci. 2018 03; 63(3):665-675. PMID: 29392554; PMCID: PMC5994910.
      Citations: 9     Fields:    Translation:Humans
    25. Cisse F, Erickson DP, Hayes AMR, Opekun AR, Nichols BL, Hamaker BR. Traditional Malian Solid Foods Made from Sorghum and Millet Have Markedly Slower Gastric Emptying than Rice, Potato, or Pasta. Nutrients. 2018 Jan 26; 10(2). PMID: 29373493; PMCID: PMC5852700.
      Citations: 5     Fields:    Translation:HumansAnimalsCTClinical Trials
    26. Mindikoglu AL, Opekun AR, Putluri N, Devaraj S, Sheikh-Hamad D, Vierling JM, Goss JA, Rana A, Sood GK, Jalal PK, Inker LA, Mohney RP, Tighiouart H, Christenson RH, Dowling TC, Weir MR, Seliger SL, Hutson WR, Howell CD, Raufman JP, Magder LS, Coarfa C. Unique metabolomic signature associated with hepatorenal dysfunction and mortality in cirrhosis. Transl Res. 2018 05; 195:25-47. PMID: 29291380; PMCID: PMC6037419.
      Citations: 11     Fields:    Translation:Humans
    27. Mindikoglu AL, Opekun AR, Gagan SK, Devaraj S. Impact of Time-Restricted Feeding and Dawn-to-Sunset Fasting on Circadian Rhythm, Obesity, Metabolic Syndrome, and Nonalcoholic Fatty Liver Disease. Gastroenterol Res Pract. 2017; 2017:3932491. PMID: 29348746; PMCID: PMC5733887.
      Citations: 13     
    28. Avery SE, Quezada-Calvillo R, Kilani SB, Lin AH, Burrin DG, Hodges BE, Chacko SK, Opekun AR, Hindawy ME, Hamaker BR, Oda SI, Nichols BL. Improved Starch Digestion of Sucrase-deficient Shrews Treated With Oral Glucoamylase Enzyme Supplements. J Pediatr Gastroenterol Nutr. 2017 08; 65(2):e35-e42. PMID: 28267073.
      Citations: 1     Fields:    Translation:Animals
    29. Ettayebi K, Crawford SE, Murakami K, Broughman JR, Karandikar U, Tenge VR, Neill FH, Blutt SE, Zeng XL, Qu L, Kou B, Opekun AR, Burrin D, Graham DY, Ramani S, Atmar RL, Estes MK. Replication of human noroviruses in stem cell-derived human enteroids. Science. 2016 09 23; 353(6306):1387-1393. PMID: 27562956; PMCID: PMC5305121.
      Citations: 532     Fields:    Translation:HumansCells
    30. Opekun AR, Balesh AM, Shelby HT. Use of the Biphasic (13)C-Sucrose/Glucose Breath Test to Assess Sucrose Maldigestion in Adults with Functional Bowel Disorders. Biomed Res Int. 2016; 2016:7952891. PMID: 27579322; PMCID: PMC4992795.
      Citations: 7     Fields:    Translation:Humans
    31. Saxena K, Blutt SE, Ettayebi K, Zeng XL, Broughman JR, Crawford SE, Karandikar UC, Sastri NP, Conner ME, Opekun AR, Graham DY, Qureshi W, Sherman V, Foulke-Abel J, In J, Kovbasnjuk O, Zachos NC, Donowitz M, Estes MK. Human Intestinal Enteroids: a New Model To Study Human Rotavirus Infection, Host Restriction, and Pathophysiology. J Virol. 2016 01 01; 90(1):43-56. PMID: 26446608; PMCID: PMC4702582.
      Citations: 177     Fields:    Translation:HumansCells
    32. Atmar RL, Bernstein DI, Lyon GM, Treanor JJ, Al-Ibrahim MS, Graham DY, Jiang X, Gregoricus N, Frenck RW, Moe CL, Chen WH, Ferreira J, Barrett J, Opekun AR, Estes MK, Borkowski A, Baehner F, Goodwin R, Edmonds A, Mendelman PM, Vinj? J. Serological Correlates of Protection against a GII.4 Norovirus. Clin Vaccine Immunol. 2015 Aug; 22(8):923-9. PMID: 26041041; PMCID: PMC4519714.
      Citations: 55     Fields:    Translation:HumansCellsCTClinical Trials
    33. Schaefer JS, Attumi T, Opekun AR, Abraham B, Hou J, Shelby H, Graham DY, Streckfus C, Klein JR. MicroRNA signatures differentiate Crohn's disease from ulcerative colitis. BMC Immunol. 2015 Feb 10; 16:5. PMID: 25886994; PMCID: PMC4335694.
      Citations: 68     Fields:    Translation:HumansCells
    34. Ramani S, Neill FH, Opekun AR, Gilger MA, Graham DY, Estes MK, Atmar RL. Mucosal and Cellular Immune Responses to Norwalk Virus. J Infect Dis. 2015 Aug 01; 212(3):397-405. PMID: 25635121; PMCID: PMC4817641.
      Citations: 50     Fields:    Translation:HumansCells
    35. Atmar RL, Opekun AR, Gilger MA, Graham DY, Estes MK, Czak? R. Experimental human infection with Norwalk virus elicits a surrogate neutralizing antibody response with cross-genogroup activity. Clin Vaccine Immunol. 2015 Feb; 22(2):221-8. PMID: 25540269; PMCID: PMC4308873.
      Citations: 18     Fields:    Translation:HumansCells
    36. Atmar RL, Opekun AR, Estes MK, Graham DY. Reply to Kirby et al. J Infect Dis. 2015 Jan 01; 211(1):167. PMID: 25015947; PMCID: PMC4859318.
      Citations:    Fields:    Translation:HumansCells
    37. Harris RA, Nagy-Szakal D, Mir SA, Frank E, Szigeti R, Kaplan JL, Bronsky J, Opekun A, Ferry GD, Winter H, Kellermayer R. DNA methylation-associated colonic mucosal immune and defense responses in treatment-na?ve pediatric ulcerative colitis. Epigenetics. 2014 Aug; 9(8):1131-7. PMID: 24937444; PMCID: PMC4164498.
      Citations: 34     Fields:    Translation:HumansCells
    38. Shaiken TE, Opekun AR. Dissecting the cell to nucleus, perinucleus and cytosol. Sci Rep. 2014 May 12; 4:4923. PMID: 24815916; PMCID: PMC4017230.
      Citations: 27     Fields:    Translation:HumansCells
    39. Hergenroeder GW, Ward NH, Yu X, Opekun A, Moore AN, Kozinetz CA, Powner DJ. Randomized trial to evaluate nutritional status and absorption of enteral feeding after brain death. Prog Transplant. 2013 Dec; 23(4):374-82. PMID: 24311403; PMCID: PMC3971639.
      Citations: 2     Fields:    Translation:Humans
    40. Atmar RL, Opekun AR, Gilger MA, Estes MK, Crawford SE, Neill FH, Ramani S, Hill H, Ferreira J, Graham DY. Determination of the 50% human infectious dose for Norwalk virus. J Infect Dis. 2014 Apr 01; 209(7):1016-22. PMID: 24253285; PMCID: PMC3952671.
      Citations: 110     Fields:    Translation:HumansCells
    41. Robayo-Torres CC, Baker SS, Chumpitazi BP, Lecea CE, Nichols BL, Opekun AR. Poor starch digestion in children with CSID and recurrent abdominal pain. J Pediatr Gastroenterol Nutr. 2012 Nov; 55 Suppl 2:S32-4. PMID: 23103649.
      Citations: 2     Fields:    Translation:Humans
    42. Gilger M, Hamaker B, Nichols BL, Auricchio S, Treem WR, Naim HY, Heine M, Zimmer KP, Jones K, Eskandari R, Pinto BM, Rose DR, Lee BH, Quezada-Calvillo R, Adams B, Roach CM, Ma CX, Baker SS, Slawson MH, Robayo-Torres CC, Chumpitazi BP, Lecea CE, Opekun AR, Uhrich S, Wu Z, Huang JY, Scott CR, McMeans AR, Scholz D, Shulman RJ, Ao Z, Sterchi EE, Lin AH. Research progress reported at the 50th Anniversary of the Discovery of Congenital Sucrase-Isomaltase Deficiency Workshop. J Pediatr Gastroenterol Nutr. 2012 Nov; 55 Suppl 2:S1. PMID: 23103641; PMCID: PMC4413904.
      Citations:    Fields:    Translation:Humans
    43. Chumpitazi BP, Robayo-Torres CC, Opekun AR, Nichols BL, Naim HY. Congenital sucrase-isomaltase deficiency: summary of an evaluation in one family. J Pediatr Gastroenterol Nutr. 2012 Nov; 55 Suppl 2:S36. PMID: 23103651; PMCID: PMC4277877.
      Citations: 5     Fields:    Translation:Humans
    44. Ajami NJ, Barry MA, Carrillo B, Muhaxhiri Z, Neill FH, Prasad BV, Opekun AR, Gilger MA, Graham DY, Atmar RL, Estes MK. Antibody responses to norovirus genogroup GI.1 and GII.4 proteases in volunteers administered Norwalk virus. Clin Vaccine Immunol. 2012 Dec; 19(12):1980-3. PMID: 23035177; PMCID: PMC3535860.
      Citations: 10     Fields:    Translation:HumansCells
    45. Harris RA, Nagy-Szakal D, Pedersen N, Opekun A, Bronsky J, Munkholm P, Jespersgaard C, Andersen P, Melegh B, Ferry G, Jess T, Kellermayer R. Genome-wide peripheral blood leukocyte DNA methylation microarrays identified a single association with inflammatory bowel diseases. Inflamm Bowel Dis. 2012 Dec; 18(12):2334-41. PMID: 22467598; PMCID: PMC3812910.
      Citations: 48     Fields:    Translation:HumansCells
    46. Atmar RL, Opekun AR, Gilger MA, Graham DY, Estes MK, Czak? R. Serum hemagglutination inhibition activity correlates with protection from gastroenteritis in persons infected with Norwalk virus. Clin Vaccine Immunol. 2012 Feb; 19(2):284-7. PMID: 22190401; PMCID: PMC3272916.
      Citations: 32     Fields:    Translation:HumansCells
    47. Atmar RL, Bernstein DI, Harro CD, Al-Ibrahim MS, Chen WH, Ferreira J, Estes MK, Graham DY, Opekun AR, Richardson C, Mendelman PM. Norovirus vaccine against experimental human Norwalk Virus illness. N Engl J Med. 2011 Dec 08; 365(23):2178-87. PMID: 22150036; PMCID: PMC3761795.
      Citations: 219     Fields:    Translation:HumansCells
    48. Kavanagh O, Estes MK, Reeck A, Raju RM, Opekun AR, Gilger MA, Graham DY, Atmar RL. Serological responses to experimental Norwalk virus infection measured using a quantitative duplex time-resolved fluorescence immunoassay. Clin Vaccine Immunol. 2011 Jul; 18(7):1187-90. PMID: 21593238; PMCID: PMC3147314.
      Citations: 14     Fields:    Translation:HumansCells
    49. Reeck A, Kavanagh O, Estes MK, Opekun AR, Gilger MA, Graham DY, Atmar RL. Serological correlate of protection against norovirus-induced gastroenteritis. J Infect Dis. 2010 Oct 15; 202(8):1212-8. PMID: 20815703; PMCID: PMC2945238.
      Citations: 137     Fields:    Translation:HumansCellsCTClinical Trials
    50. Graham DY, Javed SU, Keihanian S, Abudayyeh S, Opekun AR. Dual proton pump inhibitor plus amoxicillin as an empiric anti-H. pylori therapy: studies from the United States. J Gastroenterol. 2010 Aug; 45(8):816-20. PMID: 20195646.
      Citations: 17     Fields:    Translation:HumansCellsCTClinical Trials
    51. Malaty HM, Fan X, Opekun AR, Thibodeaux C, Ferry GD. Rising incidence of inflammatory bowel disease among children: a 12-year study. J Pediatr Gastroenterol Nutr. 2010 Jan; 50(1):27-31. PMID: 19934770.
      Citations: 66     Fields:    Translation:Humans
    52. Wu DC, Hsu PI, Wu JY, Opekun AR, Kuo CH, Wu IC, Wang SS, Chen A, Hung WC, Graham DY. Sequential and concomitant therapy with four drugs is equally effective for eradication of H pylori infection. Clin Gastroenterol Hepatol. 2010 Jan; 8(1):36-41.e1. PMID: 19804842; PMCID: PMC2838430.
      Citations: 81     Fields:    Translation:HumansCells
    53. Elitsur Y, Tolia V, Gilger MA, Reeves-Garcia J, Schmidt-Sommerfeld E, Opekun AR, El-Zimaity H, Graham DY, Enmei K. Urea breath test in children: the United States prospective, multicenter study. Helicobacter. 2009 Apr; 14(2):134-40. PMID: 19298341.
      Citations: 12     Fields:    Translation:HumansCells
    54. Robayo-Torres CC, Opekun AR, Quezada-Calvillo R, Villa X, Smith EO, Navarrete M, Baker SS, Nichols BL. 13C-breath tests for sucrose digestion in congenital sucrase isomaltase-deficient and sacrosidase-supplemented patients. J Pediatr Gastroenterol Nutr. 2009 Apr; 48(4):412-8. PMID: 19330928; PMCID: PMC3955999.
      Citations: 13     Fields:    Translation:Humans
    55. Atmar RL, Opekun AR, Gilger MA, Estes MK, Crawford SE, Neill FH, Graham DY. Norwalk virus shedding after experimental human infection. Emerg Infect Dis. 2008 Oct; 14(10):1553-7. PMID: 18826818; PMCID: PMC2609865.
      Citations: 252     Fields:    Translation:HumansCells
    56. Robayo-Torres CC, Opekun AR, Sen P, Ao Z, Hamaker BR, Quaroni A, Brayer GD, Wattler S, Nehls MC, Sterchi EE, Nichols BL, Quezada-Calvillo R. Contribution of mucosal maltase-glucoamylase activities to mouse small intestinal starch alpha-glucogenesis. J Nutr. 2007 Jul; 137(7):1725-33. PMID: 17585022.
      Citations: 16     Fields:    Translation:Animals
    57. Shiotani A, Opekun AR, Graham DY. Visualization of the small intestine using capsule endoscopy in healthy subjects. Dig Dis Sci. 2007 Apr; 52(4):1019-25. PMID: 17380402.
      Citations: 16     Fields:    Translation:Humans
    58. Brunetti-Pierri N, Opekun AR, Craigen WJ. Two familial cases of high blood galactose of unknown aetiology. J Inherit Metab Dis. 2006 Dec; 29(6):762. PMID: 16988899.
      Citations:    Fields:    Translation:HumansCells
    59. Graham DY, Abudayyeh S, El-Zimaity HM, Hoffman J, Reddy R, Opekun AR. Sequential therapy using high-dose esomeprazole-amoxicillin followed by gatifloxacin for Helicobacter pylori infection. Aliment Pharmacol Ther. 2006 Sep 01; 24(5):845-50. PMID: 16918889.
      Citations: 10     Fields:    Translation:HumansCells
    60. Opekun AR, Luu P, Gotschall AB, Abdalla N, Torres E, Rudd SB, Graham DY, Nurgalieva ZZ, Tsuchiya K. Point-of-care Helicobacter pylori urine antibody detection in a multi-ethnic adult population in the United States. Transl Res. 2006 Jul; 148(1):13-8. PMID: 16887493.
      Citations: 3     Fields:    Translation:HumansCells
    61. Nurgalieva ZZ, Nugalieva ZZ, Opekun AR, Graham DY. Problem of distinguishing false-positive tests from acute or transient Helicobacter pylori infections. Helicobacter. 2006 Apr; 11(2):69-74. PMID: 16579835.
      Citations: 9     Fields:    Translation:HumansCells
    62. Graham DY, Nurgalieva ZZ, El-Zimaity HM, Opekun AR, Campos A, Guerrero L, Chavez A, Cardenas V. Noninvasive versus histologic detection of gastric atrophy in a Hispanic population in North America. Clin Gastroenterol Hepatol. 2006 Mar; 4(3):306-14. PMID: 16527693.
      Citations: 27     Fields:    Translation:HumansCells
    63. Cardenas VM, Graham DY, El-Zimaity HM, Opekun AR, Campos A, Chavez A, Guerrero L. Rabeprazole containing triple therapy to eradicate Helicobacter pylori infection on the Texas-Mexican border. Aliment Pharmacol Ther. 2006 Jan 15; 23(2):295-301. PMID: 16393310.
      Citations: 1     Fields:    Translation:HumansCells
    64. Opekun AR, Gotschall AB, Abdalla N, Agent C, Torres E, Sutton FM, Graham DY, Tsuchiya K. Improved infrared spectrophotometer for point-of-care patient 13C-urea breath testing in the primary care setting. Clin Biochem. 2005 Aug; 38(8):731-4. PMID: 15963485.
      Citations: 5     Fields:    Translation:HumansCells
    65. Opekun AR, Yeh CW, Opekun JL, Graham DY. In vivo tests of natural therapy, Tibetan yogurt or fresh broccoli, for Helicobacter pylori infection. Methods Find Exp Clin Pharmacol. 2005 Jun; 27(5):327-9. PMID: 16082421.
      Citations: 3     Fields:    Translation:HumansAnimalsCellsCTClinical Trials
    66. Nurgalieva ZZ, Conner ME, Opekun AR, Zheng CQ, Elliott SN, Ernst PB, Osato M, Estes MK, Graham DY. B-cell and T-cell immune responses to experimental Helicobacter pylori infection in humans. Infect Immun. 2005 May; 73(5):2999-3006. PMID: 15845507; PMCID: PMC1087341.
      Citations: 21     Fields:    Translation:HumansCells
    67. Agha A, Opekun AR, Abudayyeh S, Graham DY. Effect of different organic acids (citric, malic and ascorbic) on intragastric urease activity. Aliment Pharmacol Ther. 2005 May 01; 21(9):1145-8. PMID: 15854177.
      Citations: 6     Fields:    Translation:HumansCells
    68. Shahidzadeh R, Opekun A, Shiotani A, Graham DY. Effect of the carbonic anhydrase inhibitor, acetazolamide, on Helicobacter pylori infection in vivo: a pilot study. Helicobacter. 2005 Apr; 10(2):136-8. PMID: 15810944.
      Citations: 7     Fields:    Translation:HumansCTClinical Trials
    69. Graham DY, Kudo M, Reddy R, Opekun AR. Practical rapid, minimally invasive, reliable nonendoscopic method to obtain Helicobacter pylori for culture. Helicobacter. 2005 Feb; 10(1):1-3. PMID: 15691309.
      Citations: 9     Fields:    Translation:HumansCells
    70. Graham DY, Opekun AR, Belson G, El-Zimaity HM, Carlson MR. Novel bismuth-metronidazole-tetracycline triple-layer tablet for treatment of Helicobacter pylori. Aliment Pharmacol Ther. 2005 Jan 15; 21(2):165-8. PMID: 15679766.
      Citations: 3     Fields:    Translation:HumansCells
    71. Graham DY, Opekun AR, Willingham FF, Qureshi WA. Visible small-intestinal mucosal injury in chronic NSAID users. Clin Gastroenterol Hepatol. 2005 Jan; 3(1):55-9. PMID: 15645405.
      Citations: 173     Fields:    Translation:Humans
    72. Graham DY, Opekun AR, Osato MS, El-Zimaity HM, Lee CK, Yamaoka Y, Qureshi WA, Cadoz M, Monath TP. Challenge model for Helicobacter pylori infection in human volunteers. Gut. 2004 Sep; 53(9):1235-43. PMID: 15306577; PMCID: PMC1774191.
      Citations: 67     Fields:    Translation:HumansCells
    73. Graham DY, Opekun AR, Jogi M, Yamaoka Y, Lu H, Reddy R, El-Zimaity HM. False negative urea breath tests with H2-receptor antagonists: interactions between Helicobacter pylori density and pH. Helicobacter. 2004 Feb; 9(1):17-27. PMID: 15156900.
      Citations: 11     Fields:    Translation:HumansCells
    74. Nanavati SA, Opekun AR, Hacken-Bitar JB, Cole RA, Anand BS, Graham DY. Migrating shell fragment as a cause of recurrent obscure gastrointestinal bleeding. J Clin Gastroenterol. 2004 Feb; 38(2):137-8. PMID: 14745292.
      Citations:    Fields:    Translation:Humans
    75. Graham DY, Opekun AR, Hammoud F, Yamaoka Y, Reddy R, Osato MS, El-Zimaity HM. Studies regarding the mechanism of false negative urea breath tests with proton pump inhibitors. Am J Gastroenterol. 2003 May; 98(5):1005-9. PMID: 12809820.
      Citations: 40     Fields:    Translation:HumansCells
    76. Willingham FF, Opekun AR, Graham DY. Endoscopic demonstration of transient small bowel intussusception in a patient with adult celiac disease. Gastrointest Endosc. 2003 Apr; 57(4):626-7. PMID: 12665791.
      Citations: 3     Fields:    Translation:Humans
    77. Graham DY, Opekun AR, Yamaoka Y, Osato MS, el-Zimaity HM. Early events in proton pump inhibitor-associated exacerbation of corpus gastritis. Aliment Pharmacol Ther. 2003 Jan; 17(2):193-200. PMID: 12534403.
      Citations: 21     Fields:    Translation:HumansCells
    78. Opekun AR, Abdalla N, Sutton FM, Hammoud F, Kuo GM, Torres E, Steinbauer J, Graham DY. Urea breath testing and analysis in the primary care office. J Fam Pract. 2002 Dec; 51(12):1030-2. PMID: 12540328.
      Citations: 3     Fields:    Translation:HumansCells
    79. Morrisett JD, Abdel-Fattah G, Hoogeveen R, Mitchell E, Ballantyne CM, Pownall HJ, Opekun AR, Jaffe JS, Oppermann S, Kahan BD. Effects of sirolimus on plasma lipids, lipoprotein levels, and fatty acid metabolism in renal transplant patients. J Lipid Res. 2002 Aug; 43(8):1170-80. PMID: 12177161.
      Citations: 98     Fields:    Translation:Humans
    80. Hoogeveen RC, Ballantyne CM, Pownall HJ, Opekun AR, Hachey DL, Jaffe JS, Oppermann S, Kahan BD, Morrisett JD. Effect of sirolimus on the metabolism of apoB100- containing lipoproteins in renal transplant patients. Transplantation. 2001 Oct 15; 72(7):1244-50. PMID: 11602850.
      Citations: 28     Fields:    Translation:Humans
    81. Opekun AR, Gilger MA, Denyes SM, Nirken MH, Philip SP, Osato MS, Malaty HM, Hicks J, Graham DY. Helicobacter pylori infection in children of Texas. J Pediatr Gastroenterol Nutr. 2000 Oct; 31(4):405-10. PMID: 11045838.
      Citations: 23     Fields:    Translation:HumansCells
    82. Gilger MA, Gann ME, Opekun AR, Gleason WA. Efficacy of ursodeoxycholic acid in the treatment of primary sclerosing cholangitis in children. J Pediatr Gastroenterol Nutr. 2000 Aug; 31(2):136-41. PMID: 10941964.
      Citations: 6     Fields:    Translation:Humans
    83. Graham DY, Osato MS, Hoffman J, Opekun AR, Anderson SY, Kwon DH, El-Zimaity HM. Metronidazole containing quadruple therapy for infection with metronidazole resistant Helicobacter pylori: a prospective study. Aliment Pharmacol Ther. 2000 Jun; 14(6):745-50. PMID: 10848658.
      Citations: 11     Fields:    Translation:HumansCellsCTClinical Trials
    84. Estes MK, Ball JM, Guerrero RA, Opekun AR, Gilger MA, Pacheco SS, Graham DY. Norwalk virus vaccines: challenges and progress. J Infect Dis. 2000 May; 181 Suppl 2:S367-73. PMID: 10804150.
      Citations: 20     Fields:    Translation:HumansCells
    85. Graham DY, Osato MS, Hoffman J, Opekun AR, Anderson SY, El-Zimaity HM. Furazolidone combination therapies for Helicobacter pylori infection in the United States. Aliment Pharmacol Ther. 2000 Feb; 14(2):211-5. PMID: 10651662.
      Citations: 15     Fields:    Translation:HumansCellsCTClinical Trials
    86. Butel JS, Jafar S, Wong C, Arrington AS, Opekun AR, Finegold MJ, Adam E. Evidence of SV40 infections in hospitalized children. Hum Pathol. 1999 Dec; 30(12):1496-502. PMID: 10667429.
      Citations: 24     Fields:    Translation:HumansCells
    87. Ball JM, Graham DY, Opekun AR, Gilger MA, Guerrero RA, Estes MK. Recombinant Norwalk virus-like particles given orally to volunteers: phase I study. Gastroenterology. 1999 Jul; 117(1):40-8. PMID: 10381908.
      Citations: 69     Fields:    Translation:HumansCellsCTClinical Trials
    88. Opekun AR, El-Zaimaity HM, Osato MS, Gilger MA, Malaty HM, Terry M, Headon DR, Graham DY. Novel therapies for Helicobacter pylori infection. Aliment Pharmacol Ther. 1999 Jan; 13(1):35-42. PMID: 9892877.
      Citations: 12     Fields:    Translation:HumansAnimalsCells
    89. Opekun AR, Sutton FM, Graham DY. Lack of dose-response with Pancrease MT for the treatment of exocrine pancreatic insufficiency in adults. Aliment Pharmacol Ther. 1997 Oct; 11(5):981-6. PMID: 9354210.
      Citations: 3     Fields:    Translation:HumansCTClinical Trials
    90. Hulten K, Han SW, Enroth H, Klein PD, Opekun AR, Gilman RH, Evans DG, Engstrand L, Graham DY, El-Zaatari FA. Helicobacter pylori in the drinking water in Peru. Gastroenterology. 1996 Apr; 110(4):1031-5. PMID: 8612990.
      Citations: 59     Fields:    Translation:CellsPHPublic Health
    91. Ball JM, Estes MK, Hardy ME, Conner ME, Opekun AR, Graham DY. Recombinant Norwalk virus-like particles as an oral vaccine. Arch Virol Suppl. 1996; 12:243-9. PMID: 9015121.
      Citations: 9     Fields:    Translation:HumansAnimalsCellsPHPublic Health
    92. Opekun AR, Klein PD, Graham DY. [13C]Aminopyrine breath test detects altered liver metabolism caused by low-dose oral contraceptives. Dig Dis Sci. 1995 Nov; 40(11):2417-22. PMID: 7587824.
      Citations: 5     Fields:    Translation:Humans
    93. Baghaie AA, Mojtahedzadeh M, Levine RL, Fromm RE, Guntupalli KK, Opekun AR. Comparison of the effect of intermittent administration and continuous infusion of famotidine on gastric pH in critically ill patients: results of a prospective, randomized, crossover study. Crit Care Med. 1995 Apr; 23(4):687-91. PMID: 7712759.
      Citations: 6     Fields:    Translation:HumansCTClinical Trials
    94. Graham DY, Jiang X, Tanaka T, Opekun AR, Madore HP, Estes MK. Norwalk virus infection of volunteers: new insights based on improved assays. J Infect Dis. 1994 Jul; 170(1):34-43. PMID: 8014518.
      Citations: 142     Fields:    Translation:HumansCells
    95. Levine RL, Fromm RE, Mojtahedzadeh M, Baghaie AA, Opekun AR. Equivalence of litmus paper and intragastric pH probes for intragastric pH monitoring in the intensive care unit. Crit Care Med. 1994 Jun; 22(6):945-8. PMID: 7911416.
      Citations: 7     Fields:    Translation:HumansCTClinical Trials
    96. Motil KJ, Opekun AR, Montandon CM, Berthold HK, Davis TA, Klein PD, Reeds PJ. Leucine oxidation changes rapidly after dietary protein intake is altered in adult women but lysine flux is unchanged as is lysine incorporation into VLDL-apolipoprotein B-100. J Nutr. 1994 Jan; 124(1):41-51. PMID: 8283293.
      Citations: 8     Fields:    Translation:HumansCells
    97. Wong WW, Hachey DL, Insull W, Opekun AR, Klein PD. Effect of dietary cholesterol on cholesterol synthesis in breast-fed and formula-fed infants. J Lipid Res. 1993 Aug; 34(8):1403-11. PMID: 8409771.
      Citations: 36     Fields:    Translation:Humans
    98. Graham DY, Opekun AR, Klein PD. Clarithromycin for the eradication of Helicobacter pylori. J Clin Gastroenterol. 1993 Jun; 16(4):292-4. PMID: 8331260.
      Citations: 15     Fields:    Translation:HumansCells
    99. Graham DY, Klein PD, Evans DG, Evans DJ, Alpert LC, Opekun A, Jerdack GR, Morgan DR. Simple noninvasive method to test efficacy of drugs in the eradication of Helicobacter pylori infection: the example of combined bismuth subsalicylate and nitrofurantoin. Am J Gastroenterol. 1991 Sep; 86(9):1158-62. PMID: 1882794.
      Citations: 4     Fields:    Translation:HumansCells
    100. Opekun AR, Graham DY. Antimony electrodes for in vivo pH monitoring. Dig Dis Sci. 1991 Aug; 36(8):1180-1. PMID: 1864216.
      Citations:    Fields:    Translation:Humans
    101. Klein PD, Graham DY, Gaillour A, Opekun AR, Smith EO. Water source as risk factor for Helicobacter pylori infection in Peruvian children. Gastrointestinal Physiology Working Group. Lancet. 1991 Jun 22; 337(8756):1503-6. PMID: 1675369.
      Citations: 123     Fields:    Translation:HumansCellsPHPublic Health
    102. Graham DY, Opekun A, Lew GM, Klein PD, Walsh JH. Helicobacter pylori-associated exaggerated gastrin release in duodenal ulcer patients. The effect of bombesin infusion and urea ingestion. Gastroenterology. 1991 Jun; 100(6):1571-5. PMID: 2019363.
      Citations: 14     Fields:    Translation:HumansCells
    103. Opekun AR, Smith JL, Graham DY. Antimony electrodes. Mucosal potential differences and buffer composition adversely affect pH measurements in the stomach. Dig Dis Sci. 1990 Aug; 35(8):950-5. PMID: 2384040.
      Citations: 3     Fields:    Translation:Humans
    104. Graham DY, Opekun A, Lew GM, Evans DJ, Klein PD, Evans DG. Ablation of exaggerated meal-stimulated gastrin release in duodenal ulcer patients after clearance of Helicobacter (Campylobacter) pylori infection. Am J Gastroenterol. 1990 Apr; 85(4):394-8. PMID: 2327380.
      Citations: 45     Fields:    Translation:Humans
    105. Smith JL, Opekun AR, Larkai E, Graham DY. Sensitivity of the esophageal mucosa to pH in gastroesophageal reflux disease. Gastroenterology. 1989 Mar; 96(3):683-9. PMID: 2914634.
      Citations: 38     Fields:    Translation:HumansCTClinical Trials
    106. Graham DY, Klein PD, Opekun AR, Smith KE, Polasani RR, Evans DJ, Evans DG, Alpert LC, Michaletz PA, Yoshimura HH, et al. In vivo susceptibility of Campylobacter pylori. Am J Gastroenterol. 1989 Mar; 84(3):233-8. PMID: 2919580.
      Citations: 18     Fields:    Translation:HumansCells
    107. Graham DY, Smith JL, Opekun AR. Spicy food and the stomach. Evaluation by videoendoscopy. JAMA. 1988 Dec 16; 260(23):3473-5. PMID: 3210286.
      Citations: 7     Fields:    Translation:HumansCTClinical Trials
    108. Evans DG, Evans DJ, Opekun AR, Graham DY. Non-replicating oral whole cell vaccine protective against enterotoxigenic Escherichia coli (ETEC) diarrhea: stimulation of anti-CFA (CFA/I) and anti-enterotoxin (anti-LT) intestinal IgA and protection against challenge with ETEC belonging to heterologous serotypes. FEMS Microbiol Immunol. 1988 Dec; 1(3):117-25. PMID: 3078739.
      Citations: 23     Fields:    Translation:HumansCells
    109. Graham DY, Klein PD, Opekun AR, Boutton TW. Effect of age on the frequency of active Campylobacter pylori infection diagnosed by the [13C]urea breath test in normal subjects and patients with peptic ulcer disease. J Infect Dis. 1988 Apr; 157(4):777-80. PMID: 3346569.
      Citations: 43     Fields:    Translation:Humans
    110. Graham DY, Klein PD, Opekun AR, Boutton TW, Evans DJ, Evans DG, Alpert LC, Michaletz PA, Yoshimura HH, Adam E. Epidemiology of Campylobacter pylori infection: ethnic considerations. Scand J Gastroenterol Suppl. 1988; 142:9-13. PMID: 3166539.
      Citations: 14     Fields:    Translation:Humans
    111. Evans DJ, Evans DG, Opekun AR, Graham DY. Immunoprotective oral whole cell vaccine for enterotoxigenic Escherichia coli diarrhea prepared by in situ destruction of chromosomal and plasmid DNA with colicin E2. FEMS Microbiol Immunol. 1988 Jan; 1(1):9-18. PMID: 3078575.
      Citations: 12     Fields:    Translation:HumansCellsPHPublic HealthCTClinical Trials
    112. Graham DY, Klein PD, Evans DJ, Evans DG, Alpert LC, Opekun AR, Boutton TW. Campylobacter pylori detected noninvasively by the 13C-urea breath test. Lancet. 1987 May 23; 1(8543):1174-7. PMID: 2883491.
      Citations: 156     Fields:    Translation:HumansCellsCTClinical Trials
    113. Smith JL, Opekun A, Graham DY. Controlled comparison of topical anesthetic agents in flexible upper gastrointestinal endoscopy. Gastrointest Endosc. 1985 Aug; 31(4):255-8. PMID: 3875515.
      Citations: 1     Fields:    Translation:HumansCTClinical Trials
    114. Graham DY, Opekun AR, Smith JL, Schwartz JT. Ranitidine and hepatotoxicity. Ann Intern Med. 1985 Mar; 102(3):416. PMID: 3970492.
      Citations: 4     Fields:    Translation:Humans
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