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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">nnp</journal-id><journal-title-group><journal-title xml:lang="en">Neurology, Neuropsychiatry, Psychosomatics</journal-title><trans-title-group xml:lang="ru"><trans-title>Неврология, нейропсихиатрия, психосоматика</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2074-2711</issn><issn pub-type="epub">2310-1342</issn><publisher><publisher-name>"IMA-Press", LLC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.14412/2074-2711-2023-3-121-127</article-id><article-id custom-type="elpub" pub-id-type="custom">nnp-2040</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="en"><subject>REVIEWS</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ОБЗОРЫ</subject></subj-group></article-categories><title-group><article-title>Vitamin B12 deficiency and Parkinson’s disease</article-title><trans-title-group xml:lang="ru"><trans-title>Дефицит витамина В12 и болезнь Паркинсона</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8718-7266</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Залялова</surname><given-names>З. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Zalyalova</surname><given-names>Z. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Зулейха Абдуллазяновна Залялова</p><p>420049, Казань, ул. Бутлерова, 49;  420039, Казань, ул. Исаева, 5</p></bio><bio xml:lang="en"><p>Zuleikha Abdullazyanovna Zalyalova</p><p>49, Butlerova St., Kazan 420012; 5, Isaeva St., Kazan 420039</p></bio><email xlink:type="simple">z.zalyalova@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3638-6094</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Екушева</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Ekusheva</surname><given-names>E. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>125371, Москва, Волоколамское шоссе, 91; 308015, Белгород, ул. Победы, 85</p></bio><bio xml:lang="en"><p>91, Volokolamskoe Shosse, Moscow 125371; 85, Pobedy St., Belgorod 308015</p></bio><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБОУ ВО «Казанский государственный медицинский университет» Минздрава России; Консультативно0диагностический центр экстрапирамидной патологии и ботулинотерапии Республики Татарстан</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Kazan State Medical University, Ministry of Health of Russia; Consultative and Diagnostic Center for Extrapyramidal Pathology and Botulinum Toxin Therapy of the Republic of Tatarstan</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Академия постдипломного образования ФГБУ «Федеральный научно-клинический центр специализированных видов медицинской помощи и медицинских технологий Федерального медико-биологического агентства»; ФГАОУ ВО «Белгородский государственный национальный исследовательский университет»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Academy of Postgraduate Education, Federal Scientific and Clinical Center for Specialized Types of Medical Aid and Medical Technologies, FMBA of Russia; Belgorod State National Research University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>04</day><month>07</month><year>2023</year></pub-date><volume>15</volume><issue>3</issue><fpage>121</fpage><lpage>127</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Zalyalova Z.A., Ekusheva E.V., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Залялова З.А., Екушева Е.В.</copyright-holder><copyright-holder xml:lang="en">Zalyalova Z.A., Ekusheva E.V.</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://nnp.ima-press.net/nnp/article/view/2040">https://nnp.ima-press.net/nnp/article/view/2040</self-uri><abstract><p>Parkinson’s disease (PD) is a progressive neurodegenerative disease with various clinical manifestations, its origin not always can be explained only by dopamine deficiency. Long-term treatment with levodopa (especially its intraduodenal administration), as well as clinical manifestations of polyneuropathy, cognitive deficits, postural disorders with freezing of gate, REM sleep behavioral disorders, are more often associated with vitamin B12 deficiency. Several reasons for this association and mechanisms of their development are discussed. Early detection of cobalamin deficiency in PD, especially in patients from high-risk groups, makes it possible to stop this pathological condition timely and prevent irreversible changes. Modern data on the use of high-dose (1000 μ g) oral vitamin B12 are presented, it has comparable clinical efficacy and significant advantages, compared with the parenteral form, in terms of the ease of use and the ability to avoid undesirable postinjection reactions.</p></abstract><trans-abstract xml:lang="ru"><p>Болезнь Паркинсона (БП) является прогрессирующим нейродегенеративным заболеванием с различными клиническими проявлениями, происхождение которых не всегда можно объяснить лишь дефицитом дофамина. Длительное лечение препаратами леводопы (особенно ее интрадуоденальное введение), как и клинические проявления полиневропатии, когнитивного дефицита, постуральные нарушения с застываниями, нарушение поведения в быструю фазу сна, чаще ассоциированы с дефицитом витамина В12. Обсуждаются несколько причин такой ассоциации и механизмы их развития. Раннее выявление дефицита кобаламина при БП, особенно у пациентов из групп высокого риска, позволяет своевременно купировать это патологическое состояние и предотвратить необратимые для организма изменения. Приведены современные данные оприменении высокодозного (1000 мкг) перорального витамина В12, существенными преимуществами которого, посравнению спарентеральной формой, являются удобство использования и возможность избежать нежелательных постинъекционных реакций наряду с сопоставимой клинической эффективностью.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>дефицит витамина В12</kwd><kwd>недостаточность витамина В12</kwd><kwd>болезнь Паркинсона</kwd><kwd>леводопа</kwd><kwd>комбинированные препараты леводопы</kwd><kwd>цианокобаламин</kwd><kwd>высокодозный витамин В12</kwd><kwd>пероральная форма витамина В12</kwd></kwd-group><kwd-group xml:lang="en"><kwd>vitamin B12 deficiency</kwd><kwd>Parkinson’s disease</kwd><kwd>levodopa</kwd><kwd>combined levodopa drugs</kwd><kwd>cyanocobalamin</kwd><kwd>high-dose vitamin B12</kwd><kwd>oral form of vitamin B12</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Статья спонсируется компанией «Верваг Фарма»</funding-statement><funding-statement xml:lang="en">This article has been supported by Woerwag Pharma</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Shenkin A, Roberts N. 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