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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">perinatology</journal-id><journal-title-group><journal-title xml:lang="ru">Российский вестник перинатологии и педиатрии</journal-title><trans-title-group xml:lang="en"><trans-title>Rossiyskiy Vestnik Perinatologii i Pediatrii (Russian Bulletin of Perinatology and Pediatrics)</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1027-4065</issn><issn pub-type="epub">2500-2228</issn><publisher><publisher-name>Ltd. “The National Academy of Pediatric Science and Innovation”</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21508/1027-4065-2024-69-3-80-85</article-id><article-id custom-type="elpub" pub-id-type="custom">perinatology-2008</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>ОРИГИНАЛЬНЫЕ СТАТЬИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL ARTICLES</subject></subj-group></article-categories><title-group><article-title>Синдром Прадера–Вилли с атипичной делецией 15q вследствие несбалансированной транслокации между хромосомами 13 и 15</article-title><trans-title-group xml:lang="en"><trans-title>Prader–Willi syndrome with atypical 15q deletion due to an unbalanced translocation between chromosomes 13 and 15</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0641-1084</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шилова</surname><given-names>Н. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Shilova</surname><given-names>N. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Шилова Надежда Владимировна — д.м.н., зав. лабораторией цитогенетики</p><p>15522 Москва, ул. Москворечье, д. 1</p></bio><email xlink:type="simple">nvsh05@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5458-0408</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Миньженкова</surname><given-names>М. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Minzhenkova</surname><given-names>M. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Миньженкова Марина Евгеньевна — к.м.н., вед. науч. сотр. лаборатории цитогенетики</p><p>15522 Москва, ул. Москворечье, д. 1</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2941-2861</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Маркова</surname><given-names>Ж. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Markova</surname><given-names>Zh. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Маркова Жанна Геннадьевна — к.б.н., ст. науч. сотр. лаборатории цитогенетики</p><p>15522 Москва, ул. Москворечье, д. 1</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9231-3009</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Матющенко</surname><given-names>Г. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Matyschenko</surname><given-names>G. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Матющенко Галина Николаевна — зав. консультативным отделением,иврач-генетик</p><p>15522 Москва, ул. Москворечье, д. 1</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБНУ «Медико-генетический научный центр им. академика Н.П. Бочкова»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Research Centre for Medical Genetics</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>12</day><month>07</month><year>2024</year></pub-date><volume>69</volume><issue>3</issue><fpage>80</fpage><lpage>85</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Ltd. “The National Academy of Pediatric Science and Innovation”, 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Ltd. “The National Academy of Pediatric Science and Innovation”</copyright-holder><copyright-holder xml:lang="en">Ltd. “The National Academy of Pediatric Science and Innovation”</copyright-holder><license xlink:href="https://www.ped-perinatology.ru/jour/about/submissions#copyrightNotice" xlink:type="simple"><license-p>https://www.ped-perinatology.ru/jour/about/submissions#copyrightNotice</license-p></license></permissions><self-uri xlink:href="https://www.ped-perinatology.ru/jour/article/view/2008">https://www.ped-perinatology.ru/jour/article/view/2008</self-uri><abstract><p>Синдром Прадера–Вилли (OMIM #176270) — мультисистемное заболевание, обусловленное различными генетическими механизмами: либо делецией в районе q11.2–q13 отцовской хромосомы 15, либо материнской однородительской дисомией хромосомы 15, либо патологией импринтинга генов в проксимальной части длинного плеча хромосомы 15. Наиболее частой является делеция 15q11.2–q13 размером примерно 6 млн п.н., которая, как правило, возникает de novo. Однако описаны редкие случаи делеции 15q11.2–q13 при несбалансированных транслокациях с вовлечением хромосомы 15. Различные диагностические методы, такие как стандартное цитогенетическое исследование, флуоресцентная гибридизация in situ (FISH) или микроматричная сравнительная геномная гибридизация необходимы не только для несомненного подтверждения клинического диагноза синдрома Прадера–Вилли, но и для установления механизмов формирования и происхождения хромосомного дисбаланса у пациента с синдромом Прадера–Вилли.</p><sec><title>Цель исследования</title><p>Цель исследования. Установление происхождения нетипичной делеции 15q у пациента с синдромом Прадера–Вилли.</p></sec><sec><title>Методы исследования</title><p>Методы исследования. Стандартное цитогенетическое исследование, FISH с ДНК-зондами на хромосомы 13 и 15, хромосомный микроматричный анализ.</p></sec><sec><title>Результаты</title><p>Результаты. При хромосомном микроматричном анализе пациента с аномальным фенотипом установлена делеция 15q11.2– q13.3 размером 8,7 млн п.н. Молекулярно-цитогенетическое обследование родителей пациента выявило у отца реципрокную транслокацию между хромосомами 13 и 15. Делеция 15q11.2–q13.3 у пациента стала следствием 2:2 патологической мейотической сегрегации отцовской реципрокной транслокации по совместному 2-му типу.</p></sec><sec><title>Заключение</title><p>Заключение. Комплексный цитогеномный подход в диагностике хромосомной патологии, ассоциированной с фенотипом синдрома Прадера–Вилли, позволяет не только точно определять количество геномных копий участков ДНК в районе q11– q13 хромосомы 15, но и детализировать структуру и происхождение геномного дисбаланса. Такая информация предоставляет возможность для более эффективного медико-генетического консультирования семьи с больным ребенком и выбора тактики последующей пренатальной или преимплантационной диагностики.</p></sec></abstract><trans-abstract xml:lang="en"><p>Prader-Willi syndrome (PWS) (OMIM #176270) is a neurobehavioral disorder that is caused by various genetic mechanisms. These mechanisms include a deletion in the q11.2–q13 region of the paternal chromosome 15, maternal uniparental disomy of chromosome 15, or a pathology of gene imprinting in the proximal part of the long arm of chromosome 15. The most common cause of PWS is a 15q11.2–q13 deletion of approximately 6 Mb, which typically occurs spontaneously. However, there have been rare cases of 15q11.2–q13 deletion associated with unbalanced translocations involving chromosome 15. In order to accurately diagnose PWS and determine the mechanisms behind the chromosomal imbalance, various diagnostic methods such as conventional cytogenetics, fluorescence in situ hybridization (FISH) or microarray comparative genomic hybridization are necessary.</p><sec><title>The aim</title><p>The aim. To determine the origin of an atypical 15q deletion in a patient with Prader–Willi syndrome.</p></sec><sec><title>Methods</title><p>Methods. Conventional cytogenetic study, FISH with DNA probes for chromosomes 13 and 15, and chromosomal microarray analysis.</p></sec><sec><title>Results</title><p>Results. Showed that the patient had an 8.7 Mb deletion in the 15q11.2–q13.3 region, which was found to be a consequence of a meiotic malsegregation of a reciprocal translocation between chromosomes 13 and 15 in the patient’s father. The scope of the results is in informing medical genetic counseling of patients and families with a hereditary disease.</p></sec><sec><title>Conclusion</title><p>Conclusion. A comprehensive cytogenomic approach in diagnosis of genetic variations associated with Prader–Willi syndrome allows for accurate determination of copy number variations and provides information on the structure and origin of genomic imbalance. This information can be valuable for guiding medical genetic counseling and making decisions regarding future prenatal or preimplantation diagnoses.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>дети</kwd><kwd>синдром Прадера–Вилли</kwd><kwd>делеция 15q</kwd><kwd>реципрокная транслокация</kwd><kwd>патологическая мейотическая сегрегация</kwd></kwd-group><kwd-group xml:lang="en"><kwd>children</kwd><kwd>Prader–Willi syndrome</kwd><kwd>15q deletion</kwd><kwd>reciprocal translocation</kwd><kwd>meiotic malsegregation</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">Cassidy S.B., Schwartz S., Miller J.L., Driscoll D.J. Prader-Willi syndrome. Genet Med 2012: 14(1): 10-26. DOI: 10.1038/gim.0b013e31822bead0</mixed-citation><mixed-citation xml:lang="en">Cassidy S.B., Schwartz S., Miller J.L., Driscoll D.J. Prader-Willi syndrome. Genet Med 2012: 14(1): 10-26. 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