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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="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Annals of Clinical and Experimental Neurology</journal-id><journal-title-group><journal-title xml:lang="en">Annals of Clinical and Experimental Neurology</journal-title><trans-title-group xml:lang="ru"><trans-title>Анналы клинической и экспериментальной неврологии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2075-5473</issn><issn publication-format="electronic">2409-2533</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">717</article-id><article-id pub-id-type="doi">10.54101/ACEN.2022.1.8</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Clinical analysis</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Клинический разбор</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Clinical observations of Leber hereditary optic neuropathy with and without neurological symptoms</article-title><trans-title-group xml:lang="ru"><trans-title>Клинические наблюдения синдрома Лебера с неврологической симптоматикой и без неё</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8706-7317</contrib-id><name-alternatives><name xml:lang="en"><surname>Kotov</surname><given-names>Sergey V.</given-names></name><name xml:lang="ru"><surname>Котов</surname><given-names>Сергей Викторович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>D. Sci. (Med.), Head, Department of neurology, Faculty of advanced training for doctors</p></bio><bio xml:lang="ru"><p>д.м.н., зав. каф. неврологии факультета усовершенствования врачей</p></bio><email>kotovsv@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4113-5799</contrib-id><name-alternatives><name xml:lang="en"><surname>Sidorova</surname><given-names>Olga P.</given-names></name><name xml:lang="ru"><surname>Сидорова</surname><given-names>Ольга Петровна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>D. Sci. (Med.), Professor, Department of neurology, Faculty of advanced training for doctors</p></bio><bio xml:lang="ru"><p>д.м.н., профессор кафедры неврологии факультета усовершенствования врачей</p></bio><email>sidorovaop2019@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0096-9140</contrib-id><name-alternatives><name xml:lang="en"><surname>Borodataya</surname><given-names>Elena V.</given-names></name><name xml:lang="ru"><surname>Бородатая</surname><given-names>Елена Васильевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Biol.), methodologist, Department for work with residents and graduate students, Faculty of advanced training for doctors</p></bio><bio xml:lang="ru"><p>к.б.н., методист отдела по работе с ординаторами и аспирантами факультета усовершенствования врачей</p></bio><email>eborodataya@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6374-9786</contrib-id><name-alternatives><name xml:lang="en"><surname>Vasilenko</surname><given-names>Irina A.</given-names></name><name xml:lang="ru"><surname>Василенко</surname><given-names>Ирина Анатольевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>D. Sci. (Med.), Head, Research laboratory</p></bio><bio xml:lang="ru"><p>д.м.н., зав. научно-исследовательской лабораторией</p></bio><email>vasilenko0604@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8439-7783</contrib-id><name-alternatives><name xml:lang="en"><surname>Borodin</surname><given-names>Alexander V.</given-names></name><name xml:lang="ru"><surname>Бородин</surname><given-names>Александр Валерьевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>neurologist, Department of neurology</p></bio><bio xml:lang="ru"><p>врач-невролог отделения неврологии</p></bio><email>borodinonav@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">M.F. Vladimirsky Moscow Regional Research and Clinical Institute</institution></aff><aff><institution xml:lang="ru">ГБУЗ МО «Московский областной научно-исследовательский клинический институт им. М.Ф. Владимирского»</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2022-01-15" publication-format="electronic"><day>15</day><month>01</month><year>2022</year></pub-date><volume>16</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>59</fpage><lpage>63</lpage><history><date date-type="received" iso-8601-date="2021-03-05"><day>05</day><month>03</month><year>2021</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2022, Kotov S.V., Sidorova O.P., Borodataya E.V., Vasilenko I.A., Borodin A.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2022, Котов С.В., Сидорова О.П., Бородатая Е.В., Василенко И.А., Бородин А.В.</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="en">Kotov S.V., Sidorova O.P., Borodataya E.V., Vasilenko I.A., Borodin A.V.</copyright-holder><copyright-holder xml:lang="ru">Котов С.В., Сидорова О.П., Бородатая Е.В., Василенко И.А., Бородин А.В.</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://annaly-nevrologii.com/pathID/article/view/717">https://annaly-nevrologii.com/pathID/article/view/717</self-uri><abstract xml:lang="en"><p>Three case studies of adults with Leber hereditary optic neuropathy with and without neurological symptoms are presented. An elevated blood lactate level and changes in the activity of the mitochondrial enzymes in peripheral blood lymphocytes were noted. Mutations in the mitochondrial DNA (G3460A in one patient and G11778A in two patients) were found. The patient with a G3460A mutation, in addition to reduced visual acuity, was diagnosed with a cerebellar disorder due to cerebellar vermis hypoplasia. These changes are indications for prescribing energotropic drugs (idebenone, carnitine); carnosine can also be prescribed. These case studies show that patients with optic nerve atrophy should be assessed for Leber hereditary optic neuropathy. Differential diagnosis with multiple sclerosis should be performed, since this condition often presents as optic neuropathy.</p></abstract><trans-abstract xml:lang="ru"><p>Представлены три клинических случая взрослых пациентов с синдромом Лебера с неврологической симптоматикой и без неё. Отмечено повышение уровня лактата в крови, изменение активности митохондриальных ферментов лимфоцитов периферической крови. У пациентов обнаружены мутации в митохондриальной ДНК (у одного — G3460A, у двух — G11778A). У пациента с мутацией G3460A наряду со снижением остроты зрения диагностирована мозжечковая неврологическая симптоматика, обусловленная гипоплазией червя мозжечка. Выявленные изменения являются показанием к назначению энерготропных препаратов (идебенона, карнитина), возможно также карнозина. Приведённые наблюдения показывают необходимость обследования пациентов с атрофией зрительных нервов для диагностики синдрома Лебера. Следует проводить дифференциальный диагноз рассеянного склероза, который часто проявляется поражением зрительного нерва.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Leber hereditary optic neuropathy</kwd><kwd>succinate dehydrogenase</kwd><kwd>glycerol-3-phosphate dehydrogenase</kwd><kwd>glutamate dehydrogenase</kwd><kwd>lactate dehydrogenase</kwd><kwd>lactate</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>синдром Лебера</kwd><kwd>сукцинатдегидрогеназа</kwd><kwd>глицерофосфатдегидрогеназа</kwd><kwd>глутаматдегидрогеназа</kwd><kwd>лактатдегидрогеназа</kwd><kwd>лактат</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Brown M.D., Voljavec A.S., Lott M.T. et al. Mitochondrial DNA complex I and III mutations associated with Leber’s hereditary optic neuropathy. Genetics. 1992;130(1):163–173. DOI: 10.1093/genetics/130.1.163. 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