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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. 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
    2. 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
    3. 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
    4. 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: 11     Fields:    Translation:HumansCells
    5. 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: 32     Fields:    Translation:HumansCells
    6. 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
    7. 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: 4     Fields:    Translation:HumansAnimalsCellsCTClinical Trials
    8. 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: 12     Fields:    Translation:HumansCells
    9. 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: 4     Fields:    Translation:HumansCells
    10. 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: 74     Fields:    Translation:HumansCells
    11. 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
    12. 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: 25     Fields:    Translation:HumansCells
    13. 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
    14. 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: 22     Fields:    Translation:HumansCells
    15. 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: 16     Fields:    Translation:HumansCellsCTClinical Trials
    16. 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
    17. 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: 13     Fields:    Translation:HumansAnimalsCells
    18. 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
    19. 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: 61     Fields:    Translation:CellsPHPublic Health
    20. 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
    21. 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
    22. 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: 144     Fields:    Translation:HumansCells
    23. 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: 9     Fields:    Translation:HumansCells
    24. 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: 16     Fields:    Translation:HumansCells
    25. 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
    26. 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
    27. 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: 126     Fields:    Translation:HumansCellsPHPublic Health
    28. 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: 15     Fields:    Translation:HumansCells
    29. 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
    30. 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
    31. 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: 40     Fields:    Translation:HumansCTClinical Trials
    32. 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: 20     Fields:    Translation:HumansCells
    33. 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
    34. 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: 24     Fields:    Translation:HumansCells
    35. 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
    36. 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
    37. 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
    38. 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: 161     Fields:    Translation:HumansCellsCTClinical Trials
    39. 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: 2     Fields:    Translation:HumansCTClinical Trials
    40. 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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