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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">nogr</journal-id><journal-title-group><journal-title xml:lang="ru">Экспериментальная и клиническая гастроэнтерология</journal-title><trans-title-group xml:lang="en"><trans-title>Experimental and Clinical Gastroenterology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1682-8658</issn><publisher><publisher-name>«Global Media Technologies»</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">nogr-304</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ЭКСПЕРИМЕНТАЛЬНАЯ ГАСТРОЭНТЕРОЛОГИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>EXPERIMENTAL GASTROENTEROLOGY</subject></subj-group></article-categories><title-group><article-title>ВЫЯВЛЕНИЕ ГЕНОВ БАКТЕРИОЦИНОВ У ПРОБИОТИЧЕСКИХ ШТАММОВ МОЛОЧНОКИСЛЫХ БАКТЕРИЙ Lactobacillus Acidophilus Д № 75 и Lactobacillus Acidophilus Д № 76</article-title><trans-title-group xml:lang="en"><trans-title>IDENTIFI CATION OF BACTERIOCIN GENES IN PROBIOTIC STRAINS OF LACTIC ACID BACTERIA Lactobacillus Acidophilus D-75 And Lactobacillus Acidophilus D-76</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Торопов</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Toropov</surname><given-names>V. A.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шалаева</surname><given-names>О. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Shalaeva</surname><given-names>O. N.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Рощина</surname><given-names>Е. К.</given-names></name><name name-style="western" xml:lang="en"><surname>Roshchina</surname><given-names>E. K.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Вахитов</surname><given-names>Т. Я.</given-names></name><name name-style="western" xml:lang="en"><surname>Vakhitov</surname><given-names>T. Y.</given-names></name></name-alternatives><email xlink:type="simple">tim-vakhitov@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ситкин</surname><given-names>С. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Sitkin</surname><given-names>S. I.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Гос. НИИ ОЧБ ФМБА России</institution><country>Россия</country></aff><aff xml:lang="en"><institution>State Research Institute of Highly Pure Biopreparations</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Гос. НИИ ОЧБ ФМБА России; СЗГМУ им. И. И. Мечникова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>State Research Institute of Highly Pure Biopreparations; North-Western State Medical University named after I. I. Mechnikov</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2016</year></pub-date><pub-date pub-type="epub"><day>20</day><month>10</month><year>2016</year></pub-date><volume>0</volume><issue>10</issue><fpage>58</fpage><lpage>65</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Торопов В.А., Шалаева О.Н., Рощина Е.К., Вахитов Т.Я., Ситкин С.И., 2016</copyright-statement><copyright-year>2016</copyright-year><copyright-holder xml:lang="ru">Торопов В.А., Шалаева О.Н., Рощина Е.К., Вахитов Т.Я., Ситкин С.И.</copyright-holder><copyright-holder xml:lang="en">Toropov V.A., Shalaeva O.N., Roshchina E.K., Vakhitov T.Y., Sitkin S.I.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.nogr.org/jour/article/view/304">https://www.nogr.org/jour/article/view/304</self-uri><abstract><p>Цель исследования: поиск генов бактериоцинов у пробиотических штаммов Lactobacillus acidophilus Д № 75 и Lactobacillus acidophilus Д № 76, входящих в состав БАД «Витафлор». Материалы и методы: Антагонистическую активность штаммов L. acidophilus Д № 75 и Д № 76 оценивали методом отсроченного антагонизма. Идентификацию генов бактериоцинов проводили методом ПЦР с использованием праймеров, специфичных для генов бактериоцина гельветицина J. Амплифицированные фрагменты секвенировали при помощи секвенатора ABI PRISM® 310 Genetic Analyzer и анализировали с применением базы данных NCBI/BLASTX. Результаты: Исследуемые бактерии проявляют выраженную антагонистическую активность (АА) против Escherichia coli O75 и Salmonella Enteritidis 209. АА пробиотических штаммов возрастала в 2-2,5 раза в присутствии метабиотика БАД «Актофлор-С», что указывает на ее индуцибельную природу. В ДНК обоих штаммов были выявлены идентичные последовательности размером 537 пар оснований (п. о.), гомологичных фрагменту гена гельветицина штамма L. helveticus DPC4571 (ген lhv_1632). Секвенирование этих фрагментов показало, что они отличаются от референсной ДНК штамма DPC4571 тремя нуклеотидами (А вместо Г в позиции 46, Ц вместо Т в позиции 249 и А вместо Т в позиции 537), причем все эти замены не приводят к изменениям соответствующей аминокислотной последовательности бактериоцина. Кроме фрагмента 537 п. о. у штамма L. acidophilus Д № 76 был выявлен другой фрагмент гена бактериоцина величиной 283 п. о., имевший 95% гомологии с геном гельветицина J штамма L. helveticus R0052 (ген R0052_09025). В базе данных NCBI/BLASTX еще у 11 микроорганизмов, относящихся к L. acidophilus, L. amylovorus, L. crispatus, L. gallinarum, L. helveticus и L. kitasatonis, были обнаружены последовательности, гомологичные гену гельветицина штамма L. helveticus DPC4571. Заключение: Полученные данные свидетельствуют о существовании, по крайней мере, двух бактериоцинов у L. acidophilus Д № 76 и одного - у L. acidophilus Д № 75. Однако истинный потенциал бактериоцинов этих пробиотических штаммов для здоровья человека еще только предстоит раскрыть.</p></abstract><trans-abstract xml:lang="en"><p>Aim: to detect the bacteriocin genes of probiotic strains Lactobacillus acidophilus D-75 and Lactobacillus acidophilus D-76 (components of Vitaflor dietary supplement). Materials and Methods: The antagonistic activity of L. acidophilus D-75 and L. acidophilus D-76 strains was estimated by the deferred antagonism method. The identification of bacteriocin genes was performed by PCR using helveticin J gene primers. Amplified fragments were sequenced using ABI PRISM® 310 Genetic Analyzer and were analyzed using NCBI/BLASTX. Results: The test bacteria exhibit pronounced antagonistic activity (AA) against Escherichia coli O75 and Salmonella Enteritidis 209. In the presence of Actoflor-S (metabiotic dietary supplement) the antagonistic activity of tested probiotic strains was 2-2.5-fold increased indicating its inducible nature. The identical sequences of 537 bp homologous to gene fragment of helveticin of L. helveticus DPC4571 (lhv_1632 gene) were detected in DNA of both strains. Sequencing of these fragments showed difference in three nucleotides compared to the reference DNA of DPC4571 strain (A instead of G at position 46, C instead of T at position 249 and A instead of T at position 537), but all these replacements do not lead to changes in the amino acid sequence of a bacteriocin. For L. acidophilus D-76 another bacteriocin gene fragment of 283 bp was identified (in addition to 537 bp fragment). The latter had 95% homology with the helveticin J gene of L. helveticus R0052 (R0052_09025 gene). In NCBI/BLASTX database the sequences homologous to the helveticin gene of L. helveticus DPC4571 were found in 11 microorganisms related to L. acidophilus, L. amylovorus, L. crispatus, L. gallinarum, L. helveticus and L. kitasatonis. Conclusion: Thus, our study shows that there are at least two bacteriocins in L. acidophilus D-76 and one bacteriocin in L. acidophilus D-75. However, the true potential of these probiotic bacteriocins for human health has yet to be realized.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Актофлор-С</kwd><kwd>антагонистическая активность</kwd><kwd>Витафлор</kwd><kwd>гельветицин</kwd><kwd>гены бактериоцинов</kwd><kwd>лактобациллы</kwd><kwd>пробиотики</kwd><kwd>секвенирование</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Actoflor-S</kwd><kwd>antagonistic activity</kwd><kwd>bacteriocin gene</kwd><kwd>helveticin</kwd><kwd>Lactobacillus</kwd><kwd>probiotics</kwd><kwd>sequencing</kwd><kwd>Vitaflor</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Weirich A, Hoffmann GF. Ernst Moro (1874-1951) - a great pediatric career started at the rise of university-based pediatric research but was curtailed in the shadows of Nazi laws. 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