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Antone Opekun

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Nadim J Ajami; Robert L Atmar; Meagan A Barry; Berenice Carrillo; Mark A Gilger; David Y Graham; Zana Muhaxhiri; Frederick H Neill; Antone R Opekun; B V Venkataram Prasad; Mary K Estes
Antibody responses to norovirus genogroup GI.1 and GII.4 proteases in volunteers administered Norwalk virus.
Bruno P Chumpitazi; Buford L Nichols; Antone R Opekun; Claudia C Robayo-Torres; Hassan Y Naim
Congenital sucrase-isomaltase deficiency: summary of an evaluation in one family.
Claudia C Robayo-Torres; Susan S Baker; Bruno P Chumpitazi; Christine E Lecea; Buford L Nichols; Antone R Opekun
Poor starch digestion in children with CSID and recurrent abdominal pain.

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All Publications

2012: Nadim J Ajami; Robert L Atmar; Meagan A Barry; Berenice Carrillo; Mark A Gilger; David Y Graham; Zana Muhaxhiri; Frederick H Neill; Antone R Opekun; B V Venkataram Prasad; Mary K Estes
Antibody responses to norovirus genogroup GI.1 and GII.4 proteases in volunteers administered Norwalk virus.
Clinical and vaccine immunology : CVI 2012;19(12):1980-3.
2012: Bruno P Chumpitazi; Buford L Nichols; Antone R Opekun; Claudia C Robayo-Torres; Hassan Y Naim
Congenital sucrase-isomaltase deficiency: summary of an evaluation in one family.
Journal of pediatric gastroenterology and nutrition 2012;55 Suppl 2():S36.
2012: Claudia C Robayo-Torres; Susan S Baker; Bruno P Chumpitazi; Christine E Lecea; Buford L Nichols; Antone R Opekun
Poor starch digestion in children with CSID and recurrent abdominal pain.
Journal of pediatric gastroenterology and nutrition 2012;55 Suppl 2():S32-4.
2012: Rita Czakó; Mark A Gilger; David Y Graham; Antone R Opekun; Robert L Atmar; Mary K Estes
Serum hemagglutination inhibition activity correlates with protection from gastroenteritis in persons infected with Norwalk virus.
Clinical and vaccine immunology : CVI 2012;19(2):284-7.
2011: Owen Kavanagh; Antone R Opekun; Ravikiran M Raju; Amanda Reeck; Mary K Estes; Mark A Gilger; David Y Graham; Robert L Atmar
Serological responses to experimental Norwalk virus infection measured using a quantitative duplex time-resolved fluorescence immunoassay.
Clinical and vaccine immunology : CVI 2011;18(7):1187-90.
2010: Amanda Reeck; Owen Kavanagh; Mary K Estes; Antone R Opekun; Mark A Gilger; David Y Graham; Robert L Atmar
Serological correlate of protection against norovirus-induced gastroenteritis.
The Journal of infectious diseases 2010;202(8):1212-8.
2010: David Y Graham; Syed Ussama Javed; Sara Keihanian; Suhaib Abudayyeh; Antone R Opekun
Dual proton pump inhibitor plus amoxicillin as an empiric anti-H. pylori therapy: studies from the United States.
Journal of gastroenterology 2010;45(8):816-20.
2010: Hoda M Malaty; Xiaolin Fan; Antone R Opekun; Carolyn Thibodeaux; George D Ferry
Rising incidence of inflammatory bowel disease among children: a 12-year study.
Journal of pediatric gastroenterology and nutrition 2010;50(1):27-31.
2010: deng-chyang wu; Ping-I Hsu; Jeng Yih Wu; Antone R Opekun; Chao-Hung Kuo; I-Chen Wu; Sophie S W Wang; Angela Chen; Wen-Chun Hung; David Y Graham
Sequential and concomitant therapy with four drugs is equally effective for eradication of H pylori infection.
Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association 2010;8(1):36-41.e1.
2009: Claudia C Robayo-Torres; Antone R Opekun; Roberto Quezada-Calvillo; Xavier Villa; E O'Brian Smith; Marilyn Navarrete; Susan S Baker; Buford L Nichols
13C-breath tests for sucrose digestion in congenital sucrase isomaltase-deficient and sacrosidase-supplemented patients.
Journal of pediatric gastroenterology and nutrition 2009;48(4):412-8.
2009: Yoram Elitsur; Vasundhara Tolia; Mark A Gilger; Jesse Reeves-Garcia; Eberhard Schmidt-Sommerfeld; Antone R Opekun; Hala El-Zimaity; David Y Graham; Kyoko Enmei
Urea breath test in children: the United States prospective, multicenter study.
Helicobacter 2009;14(2):134-40.
2008: Robert L Atmar; Antone R Opekun; Mark A Gilger; Mary K Estes; Sue E Crawford; Frederick H Neill; David Y Graham
Norwalk virus shedding after experimental human infection.
Emerging infectious diseases 2008;14(10):1553-7.
2007: Roberto Quezada-Calvillo; Claudia C Robayo-Torres; Antone R Opekun; Partha Sen; Zihua Ao; Bruce R Hamaker; Andrea Quaroni; Gary D Brayer; Sigrid Wattler; Michael Nehls; Erwin E Sterchi; Buford L Nichols
Contribution of mucosal maltase-glucoamylase activities to mouse small intestinal starch alpha-glucogenesis.
The Journal of nutrition 2007;137(7):1725-33.
2007: Akiko Shiotani; Antone R Opekun; David Y Graham
Visualization of the small intestine using capsule endoscopy in healthy subjects.
Digestive diseases and sciences 2007;52(4):1019-25.
2006: Nicola Brunetti-Pierri; Antone R Opekun; William J Craigen
Two familial cases of high blood galactose of unknown aetiology.
Journal of inherited metabolic disease 2006;29(6):762.
2006: David Y Graham; Suhaib Abudayyeh; Hala M T El-Zimaity; J Hoffman; R Reddy; Antone R Opekun
Sequential therapy using high-dose esomeprazole-amoxicillin followed by gatifloxacin for Helicobacter pylori infection.
Alimentary pharmacology & therapeutics 2006;24(5):845-50.
2006: Antone R Opekun; Phong Luu; Ann B Gotschall; Nageeb Abdalla; Elizabeth Torres; Summer B Rudd; David Y Graham; Zhannat Z Nurgalieva; Kyoko Tsuchiya
Point-of-care Helicobacter pylori urine antibody detection in a multi-ethnic adult population in the United States.
Translational research : the journal of laboratory and clinical medicine 2006;148(1):13-8.
2006: Zhannat Z Nurgalieva; Zhannat Z Nugalieva; Antone R Opekun; David Y Graham
Problem of distinguishing false-positive tests from acute or transient Helicobacter pylori infections.
Helicobacter 2006;11(2):69-74.
2006: David Y Graham; Zhannat Z Nurgalieva; Hala M T El-Zimaity; Antone R Opekun; Armando Campos; Leoncio Guerrero; Alfredo Chavez; Victor Cardenas
Noninvasive versus histologic detection of gastric atrophy in a Hispanic population in North America.
Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association 2006;4(3):306-14.
2006: V M Cardenas; David Y Graham; Hala M T El-Zimaity; Antone R Opekun; A Campos; Alfredo Chavez; L Guerrero
Rabeprazole containing triple therapy to eradicate Helicobacter pylori infection on the Texas-Mexican border.
Alimentary pharmacology & therapeutics 2006;23(2):295-301.
2005: Antone R Opekun; Ann B Gotschall; Nageeb Abdalla; Cornelia Agent; Elizabeth Torres; Fred M Sutton; David Y Graham; Kyoko Tsuchiya
Improved infrared spectrophotometer for point-of-care patient 13C-urea breath testing in the primary care setting.
Clinical biochemistry 2005;38(8):731-4.
2005: Antone R Opekun; C W Yeh; J L Opekun; D Y Graham
In vivo tests of natural therapy, Tibetan yogurt or fresh broccoli, for Helicobacter pylori infection.
Methods and findings in experimental and clinical pharmacology 2005;27(5):327-9.
2005: Aamer Agha; Antone R Opekun; Suhaib Abudayyeh; David Y Graham
Effect of different organic acids (citric, malic and ascorbic) on intragastric urease activity.
Alimentary pharmacology & therapeutics 2005;21(9):1145-8.
2005: Zhannat Z Nurgalieva; Margaret E Conner; Antone R Opekun; Carl Q Zheng; Susan N Elliott; Peter B Ernst; Michael Osato; Mary K Estes; David Y Graham
B-cell and T-cell immune responses to experimental Helicobacter pylori infection in humans.
Infection and immunity 2005;73(5):2999-3006.
2005: Rassa Shahidzadeh; Antone R Opekun; Akiko Shiotani; David Y Graham
Effect of the carbonic anhydrase inhibitor, acetazolamide, on Helicobacter pylori infection in vivo: a pilot study.
Helicobacter 2005;10(2):136-8.
2005: David Y Graham; Mayumi Kudo; Rita Reddy; Antone R Opekun
Practical rapid, minimally invasive, reliable nonendoscopic method to obtain Helicobacter pylori for culture.
Helicobacter 2005;10(1):1-3.
2005: David Y Graham; Antone R Opekun; G Belson; Hala M T El-Zimaity; M R Carlson
Novel bismuth-metronidazole-tetracycline triple-layer tablet for treatment of Helicobacter pylori.
Alimentary pharmacology & therapeutics 2005;21(2):165-8.
2005: David Y Graham; Antone R Opekun; Field F Willingham; Waqar A Qureshi
Visible small-intestinal mucosal injury in chronic NSAID users.
Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association 2005;3(1):55-9.
2004: D Y Graham; Antone R Opekun; Michael S Osato; Hala M T El-Zimaity; C K Lee; Y Yamaoka; Waqar A Qureshi; Michel Cadoz; T P Monath
Challenge model for Helicobacter pylori infection in human volunteers.
Gut 2004;53(9):1235-43.
2004: David Y Graham; Antone R Opekun; Medhavi Jogi; Yoshio Yamaoka; Hong Lu; Rita Reddy; Hala M T El-Zimaity
False negative urea breath tests with H2-receptor antagonists: interactions between Helicobacter pylori density and pH.
Helicobacter 2004;9(1):17-27.
2004: Shardul A Nanavati; Antone R Opekun; Joan B Hacken-Bitar; Rhonda A Cole; Bhupinderjit S Anand; David Y Graham
Migrating shell fragment as a cause of recurrent obscure gastrointestinal bleeding.
Journal of clinical gastroenterology 2004;38(2):137-8.
2003: David Y Graham; Antone R Opekun; Fadi Hammoud; Yoshio Yamaoka; Rita Reddy; Michael S Osato; Hala M T El-Zimaity
Studies regarding the mechanism of false negative urea breath tests with proton pump inhibitors.
The American journal of gastroenterology 2003;98(5):1005-9.
2003: Field F Willingham; Antone R Opekun; David Y Graham
Endoscopic demonstration of transient small bowel intussusception in a patient with adult celiac disease.
Gastrointestinal endoscopy 2003;57(4):626-7.
2003: David Y Graham; Antone R Opekun; Yoshio Yamaoka; Michael S Osato; Hala M T El-Zimaity
Early events in proton pump inhibitor-associated exacerbation of corpus gastritis.
Alimentary pharmacology & therapeutics 2003;17(2):193-200.
2002: Antone R Opekun; Nageeb Abdalla; Fred M Sutton; Fadi Hammoud; Grace M Kuo; Elizabeth Torres; Jeffrey R Steinbauer; David Y Graham
Urea breath testing and analysis in the primary care office.
The Journal of family practice 2002;51(12):1030-2.
2002: Joel D Morrisett; Ghada Abdel-Fattah; Ron C Hoogeveen; Eddie Mitchell; Christie M Ballantyne; Henry J Pownall; Antone R Opekun; Jonathon S Jaffe; Suzanne Oppermann; Barry D Kahan
Effects of sirolimus on plasma lipids, lipoprotein levels, and fatty acid metabolism in renal transplant patients.
Journal of lipid research 2002;43(8):1170-80.
2001: Ron C Hoogeveen; Christie M Ballantyne; Henry J Pownall; Antone R Opekun; D L Hachey; J S Jaffe; S Oppermann; Barry D Kahan; Joel D Morrisett
Effect of sirolimus on the metabolism of apoB100- containing lipoproteins in renal transplant patients.
Transplantation 2001;72(7):1244-50.
2000: Antone R Opekun; Mark A Gilger; S M Denyes; M H Nirken; S P Philip; Michael S Osato; Hoda M Malaty; J Hicks; David Y Graham
Helicobacter pylori infection in children of Texas.
Journal of pediatric gastroenterology and nutrition 2000;31(4):405-10.
2000: Mark A Gilger; M E Gann; Antone R Opekun; W A Gleason
Efficacy of ursodeoxycholic acid in the treatment of primary sclerosing cholangitis in children.
Journal of pediatric gastroenterology and nutrition 2000;31(2):136-41.
2000: David Y Graham; Michael S Osato; J Hoffman; Antone R Opekun; SY Anderson; Dong H Kwon; Hala M T El-Zimaity
Metronidazole containing quadruple therapy for infection with metronidazole resistant Helicobacter pylori: a prospective study.
Alimentary pharmacology & therapeutics 2000;14(6):745-50.
2000: Mary K Estes; JM Ball; RA Guerrero; Antone R Opekun; Mark A Gilger; Susan Pacheco; David Y Graham
Norwalk virus vaccines: challenges and progress.
The Journal of infectious diseases 2000;181 Suppl 2():S367-73.
2000: David Y Graham; Michael S Osato; J Hoffman; Antone R Opekun; SY Anderson; Hala M T El-Zimaity
Furazolidone combination therapies for Helicobacter pylori infection in the United States.
Alimentary pharmacology & therapeutics 2000;14(2):211-5.
1999: Janet S Butel; Sanjeeda Jafar; Connie Wong; Amy S Arrington; Antone R Opekun; MJ Finegold; E Adam
Evidence of SV40 infections in hospitalized children.
Human pathology 1999;30(12):1496-502.
1999: JM Ball; David Y Graham; Antone R Opekun; Mark A Gilger; RA Guerrero; Mary K Estes
Recombinant Norwalk virus-like particles given orally to volunteers: phase I study.
Gastroenterology 1999;117(1):40-8.
1999: Antone R Opekun; H M El-Zaimaity; Michael S Osato; Mark A Gilger; Hoda M Malaty; M Terry; D R Headon; David Y Graham
Novel therapies for Helicobacter pylori infection.
Alimentary pharmacology & therapeutics 1999;13(1):35-42.
1997: Antone R Opekun; Fred M Sutton; David Y Graham
Lack of dose-response with Pancrease MT for the treatment of exocrine pancreatic insufficiency in adults.
Alimentary pharmacology & therapeutics 1997;11(5):981-6.
1996: JM Ball; Mary K Estes; ME Hardy; Margaret E Conner; Antone R Opekun; David Y Graham
Recombinant Norwalk virus-like particles as an oral vaccine.
Archives of virology. Supplementum 1996;12():243-9.
1995: Antone R Opekun; PD Klein; David Y Graham
[13C]Aminopyrine breath test detects altered liver metabolism caused by low-dose oral contraceptives.
Digestive diseases and sciences 1995;40(11):2417-22.
1995: A A Baghaie; M Mojtahedzadeh; R L Levine; Robert E Fromm; Kalpalatha K Guntupalli; Antone R Opekun
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.
Critical care medicine 1995;23(4):687-91.
1994: David Y Graham; X Jiang; T Tanaka; Antone R Opekun; H P Madore; Mary K Estes
Norwalk virus infection of volunteers: new insights based on improved assays.
The Journal of infectious diseases 1994;170(1):34-43.
1994: R L Levine; Robert E Fromm; M Mojtahedzadeh; A A Baghaie; Antone R Opekun
Equivalence of litmus paper and intragastric pH probes for intragastric pH monitoring in the intensive care unit.
Critical care medicine 1994;22(6):945-8.
1994: Kathleen J Motil; Antone R Opekun; C M Montandon; Heiner K. Berthold; Teresa A Davis; PD Klein; Peter J Reeds
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.
The Journal of nutrition 1994;124(1):41-51.
1993: William W Wong; D L Hachey; W Insull; Antone R Opekun; PD Klein
Effect of dietary cholesterol on cholesterol synthesis in breast-fed and formula-fed infants.
Journal of lipid research 1993;34(8):1403-11.
1993: David Y Graham; Antone R Opekun; PD Klein
Clarithromycin for the eradication of Helicobacter pylori.
Journal of clinical gastroenterology 1993;16(4):292-4.
1991: David Y Graham; PD Klein; D G Evans; D J Evans; L C Alpert; Antone R Opekun; G R Jerdack; D R Morgan
Simple noninvasive method to test efficacy of drugs in the eradication of Helicobacter pylori infection: the example of combined bismuth subsalicylate and nitrofurantoin.
The American journal of gastroenterology 1991;86(9):1158-62.
1991: PD Klein; David Y Graham; A Gaillour; Antone R Opekun; E O Smith
Water source as risk factor for Helicobacter pylori infection in Peruvian children. Gastrointestinal Physiology Working Group.
Lancet 1991;337(8756):1503-6.
1991: David Y Graham; Antone R Opekun; G M Lew; PD Klein; J H Walsh
Helicobacter pylori-associated exaggerated gastrin release in duodenal ulcer patients. The effect of bombesin infusion and urea ingestion.
Gastroenterology 1991;100(6):1571-5.
1990: David Y Graham; Antone R Opekun; G M Lew; D J Evans; PD Klein; D G Evans
Ablation of exaggerated meal-stimulated gastrin release in duodenal ulcer patients after clearance of Helicobacter (Campylobacter) pylori infection.
The American journal of gastroenterology 1990;85(4):394-8.
1989: David Y Graham; PD Klein; Antone R Opekun; K E Smith; R R Polasani; D J Evans; D G Evans; L C Alpert; P A Michaletz; H H Yoshimura
In vivo susceptibility of Campylobacter pylori.
The American journal of gastroenterology 1989;84(3):233-8.
1988: David Y Graham; PD Klein; Antone R Opekun; T W Boutton
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.
The Journal of infectious diseases 1988;157(4):777-80.
1988: David Y Graham; PD Klein; Antone R Opekun; T W Boutton; D J Evans; D G Evans; L C Alpert; P A Michaletz; H H Yoshimura; E Adam
Epidemiology of Campylobacter pylori infection: ethnic considerations.
Scandinavian journal of gastroenterology. Supplement 1988;142():9-13.
1987: David Y Graham; PD Klein; D J Evans; D G Evans; L C Alpert; Antone R Opekun; T W Boutton
Campylobacter pylori detected noninvasively by the 13C-urea breath test.
Lancet 1987;1(8543):1174-7.