Marcis Leja

Marcis Leja

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Marcis Leja

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Review: Epidemiology of Helicobacter pylori infection.

Helicobacter 2019 Sep;24 Suppl 1:e12635

Department of Medicine I, Medical University of Vienna, Vienna, Austria.

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http://dx.doi.org/10.1111/hel.12635DOI Listing
September 2019

Non-contact breath sampling for sensor-based breath analysis.

J Breath Res 2019 Apr 1;13(3):036001. Epub 2019 Apr 1.

Institute for Breath Research, University of Innsbruck, Rathausplatz 4, A-6850 Dornbirn, Austria. Institute of Chemistry, Jan Kochanowski University, Świętokrzyska 15 G, PL-25406 Kielce, Poland.

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http://dx.doi.org/10.1088/1752-7163/ab0b8dDOI Listing
April 2019

Associations of diet and lifestyle factors with common volatile organic compounds in exhaled breath of average-risk individuals.

J Breath Res 2019 Mar 1;13(2):026006. Epub 2019 Mar 1.

Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 581, D-69120, Heidelberg, Germany. Division of Preventive Oncology, German Cancer Research Center DKFZ, Im Neuenheimer Feld 460, D-69120, Heidelberg, Germany. Heidelberg Medical Faculty, University of Heidelberg, Im Neuenheimer Feld 672, D-69120, Heidelberg, Germany.

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http://dx.doi.org/10.1088/1752-7163/aaf3dcDOI Listing
March 2019

TLR1 and PRKAA1 Gene Polymorphisms in the Development of Atrophic Gastritis and Gastric Cancer.

J Gastrointestin Liver Dis 2018 Dec;27(4):363-369

Department of Gastroenterology and Institute for Digestive Research, Lithuanian University of Health Sciences, Kaunas, Lithuania.

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http://dx.doi.org/10.15403/jgld.2014.1121.274.tlrDOI Listing
December 2018

Epidemiology of Helicobacter pylori infection.

Helicobacter 2018 Sep;23 Suppl 1:e12514

Institute of Clinical and Preventive Medicine, Faculty of Medicine, University of Latvia, Riga, Latvia.

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http://dx.doi.org/10.1111/hel.12514DOI Listing
September 2018

Associations of Epstein-Barr Virus-Positive Gastric Adenocarcinoma with Circulating Mediators of Inflammation and Immune Response.

Cancers (Basel) 2018 Aug 23;10(9). Epub 2018 Aug 23.

Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, 9609 Medical Center Dr., BG 9609/6E338, Bethesda, MD 20892, USA.

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http://dx.doi.org/10.3390/cancers10090284DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6162799PMC
August 2018

Ex vivo emission of volatile organic compounds from gastric cancer and non-cancerous tissue.

J Breath Res 2018 07 30;12(4):046005. Epub 2018 Jul 30.

Institute for Breath Research, University of Innsbruck, Rathausplatz 4, A-6850 Dornbirn, Austria. Institute of Chemistry, Jan Kochanowski University, Świętokrzyska 15G, PL-25406 Kielce, Poland.

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http://dx.doi.org/10.1088/1752-7163/aacbfbDOI Listing
July 2018

Potential of non-invasive breath tests for preselecting individuals for invasive gastric cancer screening endoscopy.

J Breath Res 2018 04 4;12(3):036009. Epub 2018 Apr 4.

Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 581, 69120, Heidelberg, Germany. Heidelberg Medical Faculty, University of Heidelberg, Im Neuenheimer Feld 672, 69120, Heidelberg, Germany.

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http://dx.doi.org/10.1088/1752-7163/aab5beDOI Listing
April 2018

Helicobacter pylori infection and nonmalignant diseases.

Helicobacter 2017 Sep;22 Suppl 1

Institute of Clinical and Preventive Medicine & Faculty of Medicine, University of Latvia, Riga, Latvia.

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http://dx.doi.org/10.1111/hel.12408DOI Listing
September 2017

Polymorphisms of microRNA target genes , , and in gastric cancer.

World J Gastroenterol 2017 May;23(19):3480-3487

Vytenis Petkevicius, Violeta Salteniene, Limas Kupcinskas, Laimas Jonaitis, Gediminas Kiudelis, Juozas Kupcinskas, Department of Gastroenterology, Lithuanian University of Health Sciences, 50009 Kaunas, Lithuania.

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http://dx.doi.org/10.3748/wjg.v23.i19.3480DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5442083PMC
May 2017

Epidemiology of Helicobacter pylori infection.

Helicobacter 2016 Sep;21 Suppl 1:3-7

Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), Heidelberg, Germany.

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http://dx.doi.org/10.1111/hel.12332DOI Listing
September 2016

Comparison of the yield from two faecal immunochemical tests at identical cutoff concentrations - a randomized trial in Latvia.

Eur J Gastroenterol Hepatol 2016 Aug;28(8):904-10

aDepartment of Medicine, Riga East University Hospital bDepartment of Medicine, University of Latvia cDepartment of Medicine, Riga East University Hospital, University of Latvia, Digestive Diseases Centre Gastro dDigestive Diseases Centre Gastro eDigestive Diseases Centre Gastro, Riga Stradins University, Riga, Latvia.

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http://dx.doi.org/10.1097/MEG.0000000000000650DOI Listing
August 2016

Silicon Nanowire Sensors Enable Diagnosis of Patients via Exhaled Breath.

ACS Nano 2016 07 14;10(7):7047-57. Epub 2016 Jul 14.

Department of Chemical Engineering and Russell Berrie Nanotechnology Institute, Technion-Israel Institute of Technology , Haifa 3200003, Israel.

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http://dx.doi.org/10.1021/acsnano.6b03127DOI Listing
July 2016

Common Genetic Variants of PSCA, MUC1 and PLCE1 Genes are not Associated with Colorectal Cancer.

Asian Pac J Cancer Prev 2015 ;16(14):6027-32

Department of Gastroenterology, Lithuanian University of Health Sciences, Kaunas, Lithuania E-mail :

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http://dx.doi.org/10.7314/apjcp.2015.16.14.6027DOI Listing
June 2016

Analysis of the effects of microbiome-related confounding factors on the reproducibility of the volatolomic test.

J Breath Res 2016 06 24;10(3):037101. Epub 2016 Jun 24.

Faculty of Medicine, University of Latvia, 19 Raina Blvd, Riga, LV 1586, Latvia. Department of Research, Riga East University Hospital, Linezera street 6, Riga, LV 1006, Latvia. Digestive Diseases Centre GASTRO, Linezera street 6, Riga, LV 1006, Latvia. Authors contributed equally to the work.

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http://dx.doi.org/10.1088/1752-7155/10/3/037101DOI Listing
June 2016

Detection of precancerous gastric lesions and gastric cancer through exhaled breath.

Gut 2016 Mar 13;65(3):400-7. Epub 2015 Apr 13.

Department of Chemical Engineering and Russell Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa, Israel.

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http://gut.bmj.com/content/early/2015/03/09/gutjnl-2014-3085
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http://dx.doi.org/10.1136/gutjnl-2014-308536DOI Listing
March 2016

Breath testing as potential colorectal cancer screening tool.

Int J Cancer 2016 Jan 7;138(1):229-36. Epub 2015 Aug 7.

Department of Chemical Engineering and Russell Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa, Israel.

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http://dx.doi.org/10.1002/ijc.29701DOI Listing
January 2016

Stomach-specific Biomarkers (GastroPanel) Can Predict the Development of Gastric Cancer in a Caucasian Population: A Longitudinal Nested Case-Control Study in Siberia.

Anticancer Res 2016 Jan;36(1):247-53

Federal State Budgetary of Scientific Institution «Institution of Internal and Preventive Medicine», Novosibirsk, Russian Federation.

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January 2016

Detection of cancer through exhaled breath: a systematic review.

Oncotarget 2015 Nov;6(36):38643-57

Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), Heidelberg, Germany.

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http://dx.doi.org/10.18632/oncotarget.5938DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4770726PMC
November 2015

Management of Helicobacter pylori-related diseases in the Baltic States.

Dig Dis 2014 10;32(3):295-301. Epub 2014 Apr 10.

Department of Gastroenterology, Lithuanian University of Health Sciences, Kaunas, Lithuania.

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http://dx.doi.org/10.1159/000357862DOI Listing
July 2015

Improving uptake of screening for colorectal cancer: a study on invitation strategies and different test kit use.

Eur J Gastroenterol Hepatol 2015 May;27(5):536-43

aFaculty of Medicine, University of Latvia bInstitute of Mathematics and Computer Science cRiga East University Hospital dDigestive Diseases Centre GASTRO, Riga, Latvia e4Pharma Ltd, Turku, Finland.

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http://dx.doi.org/10.1097/MEG.0000000000000314DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4423577PMC
May 2015

Long-term dynamics of gastric biomarkers after eradication of Helicobacter pylori infection.

Eur J Gastroenterol Hepatol 2015 May;27(5):501-5

aFaculty of Medicine, University of Latvia bDigestive Diseases Centre GASTRO, Faculty of Medicine, University of Latvia, Riga East University Hospital, Riga, Latvia cFaculty of Medicine, Lithuanian University of Health Sciences, Kaunas, Lithuania.

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http://dx.doi.org/10.1097/MEG.0000000000000308DOI Listing
May 2015

Ultrasensitive silicon nanowire for real-world gas sensing: noninvasive diagnosis of cancer from breath volatolome.

Nano Lett 2015 Feb 18;15(2):1288-95. Epub 2014 Dec 18.

The Department of Chemical Engineering and Russell Berrie Nanotechnology Institute, Technion-Israel Institute of Technology , Haifa 3200003, Israel.

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http://dx.doi.org/10.1021/nl504482tDOI Listing
February 2015

The global challenge of a healthy stomach.

Best Pract Res Clin Gastroenterol 2014 Dec 26;28(6):949-51. Epub 2014 Sep 26.

Faculty of Medicine, University of Latvia, Riga East University Hospital, Riga, Latvia.

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http://dx.doi.org/10.1016/j.bpg.2014.09.008DOI Listing
December 2014

Implementation of gastric cancer screening - the global experience.

Best Pract Res Clin Gastroenterol 2014 Dec 28;28(6):1093-106. Epub 2014 Sep 28.

Cancer Screening Assessment & Management Division, Research Center for Cancer Prevention & Detection, National Cancer Center, Tokyo 104-0045, Japan. Electronic address:

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http://dx.doi.org/10.1016/j.bpg.2014.09.005DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5847270PMC
December 2014

PSCA and MUC1 gene polymorphisms are associated with gastric cancer and pre-malignant gastric conditions [corrected].

Anticancer Res 2014 Dec;34(12):7167-75

Department of Gastroenterology, Hepatology and Infectious Diseases, Otto von Guericke University, Magdeburg, Germany.

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December 2014

Gastric cancer: prevention, screening and early diagnosis.

World J Gastroenterol 2014 Oct;20(38):13842-62

Victor Pasechnikov, Sergej Chukov, Stavropol State Medical University, 355017 Stavropol, Russia.

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http://dx.doi.org/10.3748/wjg.v20.i38.13842DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4194567PMC
October 2014

Lack of association between miR-27a, miR-146a, miR-196a-2, miR-492 and miR-608 gene polymorphisms and colorectal cancer.

Sci Rep 2014 Aug 8;4:5993. Epub 2014 Aug 8.

1] Institute for Digestive Research, Lithuanian University of Health Sciences, Eiveniu str. 2, LT-50009, Kaunas, Lithuania [2] Department of Gastroenterology, Lithuanian University of Health Sciences, Eiveniu str. 2, LT-50009, Kaunas, Lithuania.

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http://dx.doi.org/10.1038/srep05993DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4125984PMC
August 2014

The accuracy of flexible spectral imaging colour enhancement for the diagnosis of gastric intestinal metaplasia: do we still need histology to select individuals at risk for adenocarcinoma?

Eur J Gastroenterol Hepatol 2014 Jul;26(7):704-9

aFaculty of Medicine, University of Latvia bDigestive Diseases Centre GASTRO cDepartment of Research, Riga East University Hospital dAcademic Histology Laboratory, SIA eRiga East University Hospital, Riga, Latvia fCINTESIS, Porto Faculty of Medicine gDepartment of Gastroenterology, Portuguese Oncology Institute, Porto, Portugal.

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http://dx.doi.org/10.1097/MEG.0000000000000108DOI Listing
July 2014

The effect of incisura angularis biopsy sampling on the assessment of gastritis stage.

Eur J Gastroenterol Hepatol 2014 May;26(5):510-3

aFaculty of Medicine, University of Latvia bRiga East University Hospital cDigestive Diseases Centre GASTRO dAcademic Histology Laboratory, Riga, Latvia eFaculty of Medicine, Lithuanian University of Health Sciences, Kaunas, Lithuania.

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http://dx.doi.org/10.1097/MEG.0000000000000082DOI Listing
May 2014

Gastritis staging: interobserver agreement by applying OLGA and OLGIM systems.

Virchows Arch 2014 Apr 30;464(4):403-7. Epub 2014 Jan 30.

Faculty of Medicine, University of Latvia, 1a Sarlotes str, Riga, 1001, Latvia,

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http://dx.doi.org/10.1007/s00428-014-1544-3DOI Listing
April 2014

Molecular diagnostics in gastric cancer.

Front Biosci (Landmark Ed) 2014 Jan 1;19:312-38. Epub 2014 Jan 1.

Dept. of Gastroenterology, Hepatology and Infectious Diseases, Otto-von-Guericke University, Leipziger Str. 44, 39120 Magdeburg, Germany.

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January 2014

Geographical variation in the exhaled volatile organic compounds.

J Breath Res 2013 Dec 1;7(4):047102. Epub 2013 Nov 1.

Department of Chemical Engineering and Russell Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa 3200003, Israel.

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http://dx.doi.org/10.1088/1752-7155/7/4/047102DOI Listing
December 2013

Replication study of ulcerative colitis risk loci in a Lithuanian-Latvian case-control sample.

Inflamm Bowel Dis 2013 Oct;19(11):2349-55

*Institute for Digestive Research and †Department of Gastroenterology, Academy of Medicine, Lithuanian University of Health Sciences, Kaunas, Lithuania; ‡Institute of Clinical Molecular Biology, Christian-Albrechts-University, Kiel, Germany; §Center of Hepatology, Gastroenterology and Dietetics, Vilnius University, Vilnius, Lithuania; ¶Digestive Diseases Centre GASTRO, Riga, Latvia; Departments of ‖Children Diseases and **Health Management, Academy of Medicine, Lithuanian University of Health Sciences, Kaunas, Lithuania; ††Institute of Regional Health Research, University of Southern Denmark, Odense, Denmark; ‡‡Medical Department, Hospital of Southern Jutland, Aabenraa, Denmark; §§Internal Disease Department, Riga Stradins University, Riga, Latvia; and ¶¶Department of Surgery, Academy of Medicine, Lithuanian University of Health Science, Kaunas, Lithuania.

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http://dx.doi.org/10.1097/MIB.0b013e3182a3eaebDOI Listing
October 2013

Markers for gastric cancer premalignant lesions: where do we go?

Dig Dis 2012 20;30(3):268-76. Epub 2012 Jun 20.

Digestive Diseases Centre GASTRO, Riga East Clinical University Hospital, Faculty of Medicine, University of Latvia, Riga, Latvia.

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http://dx.doi.org/10.1159/000336990DOI Listing
November 2012

Changing patterns of serological testing for celiac disease in Latvia.

J Gastrointestin Liver Dis 2011 Jun;20(2):121-6

Riga East Clinical University Hospital, Digestive Diseases Centre, Riga, Latvia.

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June 2011

Helicobacter pylori and non-malignant diseases.

Helicobacter 2008 Oct;13 Suppl 1:23-7

Gastroenterology Department, Rabin Medical Center, Tel Aviv University, Tel Aviv, Israel.

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http://dx.doi.org/10.1111/j.1523-5378.2008.00635.xDOI Listing
October 2008