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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Russian Journal of Genetics</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Genetics</journal-title><trans-title-group xml:lang="ru"><trans-title>Генетика</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0016-6758</issn><issn publication-format="electronic">3034-5103</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">666892</article-id><article-id pub-id-type="doi">10.31857/S0016675823020108</article-id><article-id pub-id-type="edn">KYDKCD</article-id><article-categories><subj-group subj-group-type="toc-heading"><subject>ГЕНЕТИКА ЧЕЛОВЕКА</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Characterization of Novel <italic>F5</italic> Intronic Variant Associated with Aberrant Splicing and Severe Factor V Deficiency</article-title><trans-title-group xml:lang="ru"><trans-title>Характеристика нового интронного варианта в гене <italic>F5,</italic> ассоциированного с аберрантным сплайсингом и тяжелой формой наследственного дефицита фактора V</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Pshenichnikova</surname><given-names>O. S.</given-names></name><name xml:lang="ru"><surname>Пшеничникова</surname><given-names>О. С.</given-names></name></name-alternatives><email>pshenichnikovaolesya@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Yakovleva</surname><given-names>E. V.</given-names></name><name xml:lang="ru"><surname>Яковлева</surname><given-names>Е. В.</given-names></name></name-alternatives><email>pshenichnikovaolesya@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Zozulya</surname><given-names>N. I.</given-names></name><name xml:lang="ru"><surname>Зозуля</surname><given-names>Н. И.</given-names></name></name-alternatives><email>pshenichnikovaolesya@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Poznyakova</surname><given-names>Yu. M.</given-names></name><name xml:lang="ru"><surname>Познякова</surname><given-names>Ю. М.</given-names></name></name-alternatives><email>pshenichnikovaolesya@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Demidova</surname><given-names>E. Yu.</given-names></name><name xml:lang="ru"><surname>Демидова</surname><given-names>Е. Ю.</given-names></name></name-alternatives><email>pshenichnikovaolesya@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Surin</surname><given-names>V. L.</given-names></name><name xml:lang="ru"><surname>Сурин</surname><given-names>В. Л.</given-names></name></name-alternatives><email>pshenichnikovaolesya@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">National Medical Research Center for Hematology</institution></aff><aff><institution xml:lang="ru">Национальный медицинский исследовательский центр гематологии</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-02-01" publication-format="electronic"><day>01</day><month>02</month><year>2023</year></pub-date><volume>59</volume><issue>2</issue><fpage>209</fpage><lpage>216</lpage><history><date date-type="received" iso-8601-date="2025-02-26"><day>26</day><month>02</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, О.С. Пшеничникова, Е.В. Яковлева, Н.И. Зозуля, Ю.М. Познякова, Е.Ю. Демидова, В.Л. Сурин</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, О.С. Пшеничникова, Е.В. Яковлева, Н.И. Зозуля, Ю.М. Познякова, Е.Ю. Демидова, В.Л. Сурин</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">О.С. Пшеничникова, Е.В. Яковлева, Н.И. Зозуля, Ю.М. Познякова, Е.Ю. Демидова, В.Л. Сурин</copyright-holder><copyright-holder xml:lang="ru">О.С. Пшеничникова, Е.В. Яковлева, Н.И. Зозуля, Ю.М. Познякова, Е.Ю. Демидова, В.Л. Сурин</copyright-holder></permissions><self-uri xlink:href="https://transsyst.ru/0016-6758/article/view/666892">https://transsyst.ru/0016-6758/article/view/666892</self-uri><abstract xml:lang="en"><p id="idm45181324609536">Congenital factor V deficiency is a rare autosomal recessive bleeding disorder, caused by defects in <italic>F5</italic> gene and associated with bleeding manifestations of variable severity. In this study we report molecular and functional characterization of a novel <italic>F5</italic> variant which causes aberrant splicing and significantly reduces protein expression in a patient with severe FV deficiency. We performed <italic>F5</italic> mutation screening and functional study in a proband (FV:C 0.4%) with a history of gastrointestinal bleeding, post-traumatic bleeding, hematomas, ecchymoses, and discomfort in ankle joints since infancy. Sequencing revealed a novel homozygous <italic>F5</italic> gene variant NC_000001.10:169519985G&gt;C (or NM_000130.5:c.1297 –8C&gt;G). Bioinformatics sequence analysis predicted that this variant would lead to the acceptor site loss of the intron 8/exon 9 junction. However mRN-A analysis identified, that it also activated the aberrant splice site located 7 nucleotides upstream of the normal one and was associated with the production of an anomalous <italic>F5</italic> transcript with retention of seven nucleotides of intron 8 resulting in a premature stop codon. We revealed no traces of normal transcript in the patient. Our findings confirm that not only changes in canonical splicing dinucleotides could significantly disrupt the splicing sites and impair pre-mRNA processing.</p></abstract><trans-abstract xml:lang="ru"><p id="idm45181324607424">Наследственный дефицит фактора свертывания крови V (FV) – это редкое аутосомное наследственное заболевание, которое вызывается дефектами в гене <italic>F5</italic> и проявляется кровотечениями разной степени тяжести. Цель данного исследования – молекулярная и функциональная характеристика нового варианта гена <italic>F5,</italic> приводящего к аберрантному сплайсингу и предельному снижению активности белка, выявленного у пациента с тяжелой формой дефицита FV. Были проведены мутационный скрининг гена <italic>F5</italic> и функциональное исследование для пробанда (FV:C 0.4%), с детства страдающего желудочно-кишечными и посттравматическими кровотечениями, гематомами, экхимозами и дискомфортом в голеностопных суставах. Секвенирование выявило наличие нового гомозиготного варианта гена <italic>F5</italic> NC_000001.10:169519985G&gt;C (или NM_000130.5:c.1297 –8C&gt;G). По результатам биоинформатического анализа данный вариант должен приводить к потере акцепторного сайта на границе интрона 8 и экзона 9. Однако анализ мРНК FV показал, что помимо этого он активирует аберрантный сайт сплайсинга на дистанции в семь нуклеотидов от сайта дикого типа и приводит к образованию аномального транскрипта, в котором остается семь нуклеотидов от интрона 8 и формируется преждевременный стоп-кодон. Нормальный транскрипт у исследуемого пациента не выявлялся. Результаты данного исследования свидетельствуют в пользу того, что изменения не только в канонических динуклеотидах сайтов сплайсинга могут в значительной мере нарушать процессинг пре-мРНК.</p></trans-abstract><kwd-group xml:lang="en"><kwd>aberrant splicing</kwd><kwd>coagulation factor V</kwd><kwd>factor V deficiency</kwd><kwd><italic>F</italic>5 gene</kwd><kwd>intronic variants</kwd><kwd>mRNA analysis.</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>аберрантный сплайсинг</kwd><kwd>фактор свертывания крови V</kwd><kwd>дефицит фактора свертывания крови V</kwd><kwd>ген <italic>F5</italic></kwd><kwd>интронные варианты</kwd><kwd>анализ мРНК.</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Mann K.G., Kalafatis M. Factor V: A combination of Dr Jekyll and Mr Hyde // Blood. 2003. V. 101. P. 20–30. https://doi.org/10.1182/blood-2002-01-0290</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Duga S., Asselta R., Tenchini M.L. Coagulation factor V // Int. J. Biochem. Cell Biol. 2004. V. 36. P. 1393–1399. https://doi.org/10.1016/j.biocel.2003.08.002</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>Paraboschi E.M., Menegatti M., Peyvandi F. et al. Understanding the impact of aberrant splicing in coagulation factor V deficiency // Int. J. Mol. Sci. 2019. V. 20. № 4. P. 910. https://doi.org/10.3390/ijms20040910</mixed-citation></ref><ref id="B4"><label>4.</label><mixed-citation>Paraboschi E.M., Menegatti M., Rimoldi V. et al. Profiling the mutational landscape of coagulation factor V deficiency // Haematologica. 2020. V. 105. № 4. P. e180–e185. https://doi.org/10.3324/haematol.2019.232587</mixed-citation></ref><ref id="B5"><label>5.</label><mixed-citation>Tabibian S., Shiravand Y., Shams M. et al. A comprehensive overview of coagulation factor V and congenital factor V deficiency // Semin. Thromb. Hemost. 2019. V. 45. № 5. P. 523–543. https://doi.org/10.1055/s-0039-1687906</mixed-citation></ref><ref id="B6"><label>6.</label><mixed-citation>Asselta R., Tenchini M.L., Duga S. Inherited defects of coagulation factor V: The hemorrhagic side // J. Thromb. Haemost. 2006. V. 4. № 1. P. 26–34. https://doi.org/10.1111/j.1538-7836.2005.01590.x</mixed-citation></ref><ref id="B7"><label>7.</label><mixed-citation>Peyvandi F., Duga S., Akhavan S., Mannucci P.M. Rare coagulation deficiencies // Haemophilia. 2002. V. 8. № 3. P. 308–321. https://doi.org/10.1046/j.1365-2516.2002.00633.x</mixed-citation></ref><ref id="B8"><label>8.</label><mixed-citation>Nuzzo F., Bulato C., Nielsen B.I. et al. Characterization of an apparently synonymous F5 mutation causing aberrant splicing and factor V deficiency // Haemophilia. 2015. V. 21. № 2. P. 241–248. https://doi.org/10.1111/hae.12554</mixed-citation></ref><ref id="B9"><label>9.</label><mixed-citation>Dall’Osso C., Guella I., Duga S. et al. Molecular characterization of three novel splicing mutations causing factor V deficiency and analysis of the F5 gene splicing pattern // Haematologica. 2008. V. 93. № 10. P. 1505–1513. https://doi.org/10.3324/haematol.12934</mixed-citation></ref><ref id="B10"><label>10.</label><mixed-citation>Castoldi E., Duckers C., Radu C. et al. Homozygous F5 deep-intronic splicing mutation resulting in severe factor V deficiency and undetectable thrombin generation in platelet-rich plasma // J. Thromb. Haemost. 2011. V. 9. № 5. P. 959–968. https://doi.org/10.1111/j.1538-7836.2011.04237.x</mixed-citation></ref><ref id="B11"><label>11.</label><mixed-citation>Guella I., Paraboschi E.M., van Schalkwyk W.A. et al. Identification of the first Alu-mediated large deletion involving the F5 gene in a compound heterozygous patient with severe factor V deficiency // Thromb. Haemost. 2011. V. 106. № 2. P. 296–303. https://doi.org/10.1160/TH11-03-0149</mixed-citation></ref><ref id="B12"><label>12.</label><mixed-citation>Kuang S.Q., Hasham S., Phillips M.D. et al. Characterization of a novel autosomal dominant bleeding disorder in a large kindred from east Texas // Blood. 2001. V. 97. № 6. P. 1549–1554. https://doi.org/10.1182/blood.v97.6.1549</mixed-citation></ref><ref id="B13"><label>13.</label><mixed-citation>Lunghi B., Pinotti M., Maestri I. et al. Evaluation of factor V mRNA to define the residual factor V expression levels in severe factor V deficiency // Haematologica. 2008. V. 93. № 3. P. 477–478. https://doi.org/10.3324/haematol.11952</mixed-citation></ref><ref id="B14"><label>14.</label><mixed-citation>Asselta R., Montefusco M.C., Duga S. et al. Severe factor V deficiency: Exon skipping in the factor V gene causing a partial deletion of the C1 domain // J. Thromb. Haemost. 2003. V. 1. № 6. P. 1237–1244. https://doi.org/10.1046/j.1538-7836.2003.00160.x</mixed-citation></ref><ref id="B15"><label>15.</label><mixed-citation>van Wijk R., Nieuwenhuis K., van den Berg M. et al. Five novel mutations in the gene for human blood coagulation factor V associated with type I factor V deficiency // Blood. 2001. V. 98. № 2. P. 358–367. https://doi.org/10.1182/blood.v98.2.358</mixed-citation></ref><ref id="B16"><label>16.</label><mixed-citation>Desmet F.O., Hamroun D., Lalande M. et al. Human Splicing Finder: An online bioinformatics tool to predict splicing signals // Nucl. Acids Res. 2009. V. 37. P. e67. https://doi.org/10.1093/nar/gkp215</mixed-citation></ref><ref id="B17"><label>17.</label><mixed-citation>Hebsgaard S.M., Korning P.G., Tolstrup N. et al. Splice site prediction in Arabidopsis thaliana pre-mRNA by combining local and global sequence information // Nucl. Acids Res. 1996. V. 24. P. 3439–3452. https://doi.org/10.1093/nar/24.17.3439</mixed-citation></ref><ref id="B18"><label>18.</label><mixed-citation>Reese M.G., Eeckman F.H., Kulp D., Haussler D. Improved splice site detection in Genie // J. Comput. Biol. 1997. V. 4. P. 311–323. https://doi.org/10.1089/cmb.1997.4.311</mixed-citation></ref><ref id="B19"><label>19.</label><mixed-citation>Jaganathan K., Kyriazopoulou Panagiotopoulou S., McRae J.F. et al. Predicting splicing from primary sequence with deep learning // Cell. 2019. V. 176. № 3. P. 535–548. e24. https://doi.org/10.1016/j.cell.2018.12.015</mixed-citation></ref><ref id="B20"><label>20.</label><mixed-citation>Richards S., Aziz N., Bale S. et al. Standards and guidelines for the interpretation of sequence variants: A joint consensus recommendation of the American College of Medical Genetics and Genomics and the Association for Molecular Pathology // Genet. Med. 2015. V. 17. № 5. P. 405–424. https://doi.org/10.1038/gim.2015.30</mixed-citation></ref><ref id="B21"><label>21.</label><mixed-citation>Hug N., Longman D., Cáceres J.F. Mechanism and regulation of the nonsense-mediated decay pathway // Nucl. Acids Res. 2016. V. 44. № 4. P. 1483–1495. https://doi.org/10.1093/nar/gkw010</mixed-citation></ref><ref id="B22"><label>22.</label><mixed-citation>Schrijver I., Koerper M.A., Jones C.D., Zehnder J.L. Homozygous factor V splice site mutation associated with severe factor V deficiency // Blood. 2002. V. 99. P. 3063–3065. https://doi.org/10.1182/blood.v99.8.3063</mixed-citation></ref><ref id="B23"><label>23.</label><mixed-citation>Fu Q.H., Zhou R.F., Liu L.G. et al. Identification of three F5 gene mutations associated with inherited coagulation factor V deficiency in two Chinese pedigrees // Haemophilia. 2004. V. 10. P. 264–270. https://doi.org/10.1111/j.1365-2516.2004.00896.x</mixed-citation></ref></ref-list></back></article>
