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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">Pediatric Hematology/Oncology and Immunopathology</journal-id><journal-title-group><journal-title xml:lang="en">Pediatric Hematology/Oncology and Immunopathology</journal-title><trans-title-group xml:lang="ru"><trans-title>Вопросы гематологии/онкологии и иммунопатологии в педиатрии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1726-1708</issn><issn publication-format="electronic">2414-9314</issn><publisher><publisher-name xml:lang="en">Fund Doctors, Innovations, Science for Children</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">753</article-id><article-id pub-id-type="doi">10.24287/1726-1708-2024-23-1-146-148</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>CLINICAL OBSERVATIONS</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>КЛИНИЧЕСКИЕ НАБЛЮДЕНИЯ</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Triosephosphate isomerase deficiency in a Tunisian case series</article-title><trans-title-group xml:lang="ru"><trans-title>Triosephosphate isomerase deficiency in a Tunisian case series</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0897-8930</contrib-id><name><surname>Elleuch</surname><given-names>Amal</given-names></name><address><country country="TN">Tunisia</country></address><bio><p>Elleuch Amal, MD</p><p>Department of Pediatric Emergency and Reanimation</p><p>30219; El Ain; Sfax</p></bio><email>amalelleuch@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name><surname>Sirine</surname><given-names>Bouzid</given-names></name><address><country country="TN">Tunisia</country></address><bio><p>Bouzid Sirine</p><p>Sfax</p></bio><email>sirine_bouzid@medecinesfax.org</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3908-9300</contrib-id><name><surname>Imen</surname><given-names>Boujelben</given-names></name><address><country country="TN">Tunisia</country></address><bio><p>Boujelben Imen</p><p>Genetic department</p><p>Sfax</p></bio><email>imeneboujelbene@gmail.com</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name><surname>Bayen</surname><given-names>Maalej</given-names></name><address><country country="TN">Tunisia</country></address><bio><p>Maalej Bayen</p><p>Pediatric department</p><p>Sfax</p></bio><email>mm_bayen@yahoo.fr</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name><surname>Messaoudi</surname><given-names>Taieb</given-names></name><address><country country="TN">Tunisia</country></address><bio><p>Taieb Messaoudi</p><p>Biochemistry department</p><p>Tunis</p></bio><email>msst99@rns.tn</email><xref ref-type="aff" rid="aff4"/></contrib><contrib contrib-type="author"><name><surname>Hassen</surname><given-names>Kammoun</given-names></name><address><country country="TN">Tunisia</country></address><bio><p>Kammoun Hassen</p><p>Genetic department</p><p>Sfax</p></bio><email>email.hassen.kamoun@gmail.com</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7110-016X</contrib-id><name><surname>Faiza</surname><given-names>Safi</given-names></name><address><country country="TN">Tunisia</country></address><bio><p>Safi Faiza</p><p>Sfax</p></bio><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff id="aff1"><institution>Hedi Chaker Hospital</institution></aff><aff id="aff2"><institution>University Hospital Habib Bourguiba, University of Sfax</institution></aff><aff id="aff3"><institution>University Hospital Hedi Chaker, University of Sfax</institution></aff><aff id="aff4"><institution>Béchir-Hamza Children's Hospital</institution></aff><pub-date date-type="pub" iso-8601-date="2024-04-19" publication-format="electronic"><day>19</day><month>04</month><year>2024</year></pub-date><volume>23</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>146</fpage><lpage>148</lpage><history><date date-type="received" iso-8601-date="2023-08-12"><day>12</day><month>08</month><year>2023</year></date><date date-type="accepted" iso-8601-date="2023-08-29"><day>29</day><month>08</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, «D. Rogachev NMRCPHOI»</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, ФГБУ «НМИЦ ДГОИ им. Дмитрия Рогачева» Минздрава России</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">«D. Rogachev NMRCPHOI»</copyright-holder><copyright-holder xml:lang="ru">ФГБУ «НМИЦ ДГОИ им. Дмитрия Рогачева» Минздрава России</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://hemoncim.com/jour/article/view/753">https://hemoncim.com/jour/article/view/753</self-uri><abstract xml:lang="en"><p>   Triosephosphate isomerase deficiency (TPID) is the most severe glycolytic enzyme defect associated with a progressive neurologic dysfunction. It typically causes hemolytic anemia, neurodegeneration, and recurrent bacterial infections. TPID is caused by a homozygous or a compound heterozygous mutation in the TPID gene. The most frequent variant is Glu104Asp. We report a case series from three unrelated Tunisian families affected by TPID caused by a homozygous Glu104Asp mutation. These reported cases had severe hemolytic anemia. Informed consent was obtained from patients’ parents.</p></abstract><trans-abstract xml:lang="ru"><p>   Triosephosphate isomerase deficiency (TPID) is the most severe glycolytic enzyme defect associated with a progressive neurologic dysfunction. It typically causes hemolytic anemia, neurodegeneration, and recurrent bacterial infections. TPID is caused by a homozygous or a compound heterozygous mutation in the TPID gene. The most frequent variant is Glu104Asp. We report a case series from three unrelated Tunisian families affected by TPID caused by a homozygous Glu104Asp mutation. These reported cases had severe hemolytic anemia. Informed consent was obtained from patients’ parents.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Triosephosphate isomerase deficiency</kwd><kwd>Homozygous mutation</kwd><kwd>Hemolytic anemia</kwd><kwd>Pediatrics.</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>triosephosphate isomerase deficiency</kwd><kwd>homozygous mutation</kwd><kwd>hemolytic anemia</kwd><kwd>pediatrics</kwd></kwd-group><funding-group><funding-statement xml:lang="en">Not specified</funding-statement><funding-statement xml:lang="ru">Not specified</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Harris C., Nelson B., Farber D., Bickel S., Huxol H., Asamoah A., Morton R. Child Neurology: Triosephosphate isomerase deficiency. Neurology 2020; 95 (24): e3448–51. DOI: 10.1212/WNL.0000000000010745</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Orosz F., Oláh J., Ovádi J.. 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