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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">nefr</journal-id><journal-title-group><journal-title xml:lang="ru">Нефрология</journal-title><trans-title-group xml:lang="en"><trans-title>Nephrology (Saint-Petersburg)</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-6274</issn><issn pub-type="epub">2541-9439</issn><publisher><publisher-name>Pavlov First Saint-Petersburg State Medical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.36485/1561-6274-2025-29-4-100-105</article-id><article-id custom-type="edn" pub-id-type="custom">QSENLW</article-id><article-id custom-type="elpub" pub-id-type="custom">nefr-2501</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>НАБЛЮДЕНИЯ ИЗ ПРАКТИКИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PRACTICAL NOTES</subject></subj-group></article-categories><title-group><article-title>Клинический фенотип у девочки с семейной гипомагниемией с гиперкальциурией и нефрокальцинозом</article-title><trans-title-group xml:lang="en"><trans-title>Clinical phenotype in a girl with familial hypomagnesemia with hypercalciuria and nephrocalcinosis</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8166-2449</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Зайкова</surname><given-names>Н. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Zaikova</surname><given-names>N. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Проф. Зайкова Наталья Михайловна, д-р мед. наук</p><p>Кафедра инновационной педиатрии и детской хирургии факультета дополнительного профессионального образования</p><p>117513, Москва, ул. Островитянова, д. 1</p><p>Тел.: +7 (964) 529-90-49</p></bio><bio xml:lang="en"><p>Prof. Natalia M. Zaikova, MD, PhD, DMedSc</p><p>Innovative Pediatrics and Pediatric Surgery Department</p><p>117513, Moscow, Ostovityanova st., 1</p><p>Phone: +7 (964) 529-90-49</p></bio><email xlink:type="simple">nataliazaikova@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/0009-0007-8537-2741</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Магомедова</surname><given-names>Д. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Magomedova</surname><given-names>D. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Проф. Магомедова Джамиля Джабраиловна</p><p>Кафедра инновационной педиатрии и детской хирургии факультета дополнительного профессионального образования</p><p>117513, Москва, ул. Островитянова, д. 1</p><p>Тел.: +7 (964) 529-90-49</p></bio><bio xml:lang="en"><p>Dzhamilya D. Magomedova, MD</p><p>Innovative Pediatrics and Pediatric Surgery Department</p><p>117513, Moscow, Ostovityanova st., 1</p><p>Phone: +7 (964) 529-90-49</p></bio><email xlink:type="simple">magomedovadd95@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0005-0074-2359</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Хажиева</surname><given-names>А. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Hazhieva</surname><given-names>A. R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Проф. Хажиева Аминат Рамзановна</p><p>Кафедра инновационной педиатрии и детской хирургии факультета дополнительного профессионального образования</p><p>117513, Москва, ул. Островитянова, д. 1</p><p>Тел.: +7 (964) 062-16-46</p></bio><bio xml:lang="en"><p>Aminat R. Hazhieva, MD</p><p>Innovative Pediatrics and Pediatric Surgery Department</p><p>117513, Moscow, Ostovityanova st., 1</p><p>Phone: +7 (964) 062-16-46</p></bio><email xlink:type="simple">amina.kha.95@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Российский национальный исследовательский медицинский университет имени Н.И. Пирогова; Научно-исследовательский клинический институт педиатрии и детской хирургии им. академика Ю.Е. Вельтищева</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Pirogov Russian National Research Medical University of the Ministry of Health of the Russian Federation; Veltischev Research and Clinical Institute for Pediatrics and Pediatric Surgery of the Pirogov Russian National Research Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Российский национальный исследовательский медицинский университет имени Н.И. Пирогова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Pirogov Russian National Research Medical University of the Ministry of Health of the Russian Federation</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>26</day><month>01</month><year>2026</year></pub-date><volume>29</volume><issue>4</issue><fpage>100</fpage><lpage>105</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Зайкова Н.М., Магомедова Д.Д., Хажиева А.Р., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Зайкова Н.М., Магомедова Д.Д., Хажиева А.Р.</copyright-holder><copyright-holder xml:lang="en">Zaikova N.M., Magomedova D.D., Hazhieva A.R.</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://journal.nephrolog.ru/jour/article/view/2501">https://journal.nephrolog.ru/jour/article/view/2501</self-uri><abstract><p>Семейная гипомагниемия с гиперкальциурией и нефрокальцинозом (FHHNC- familial hypomagnesaemia with hypercalciuria and nephrocalcinosis) - редкое аутосомно-рецессивное заболевание почечных канальцев, вызванное мутациями в генах CLDN 16 или CLDN19, кодирующих белки клаудин-16 и клаудин-19. CLDN 16 или CLDN19 играют важную роль в клеточном транспорте магния и кальция в толстой восходящей части петли Генле и отвечают за большую часть реабсорбции магния в канальцах. FHHNC характеризуется гипомагниемией, гиперкальциурией, медуллярным нефрокальцинозом и поражением глаз, а также прогрессирует до хронической почечной недостаточности, требуя диализа и трансплантации почки в основном у молодых взрослых. Продемонстрирован клинический случай быстропрогрессирующего снижения функции почек у пациентки с мутациями в гене CLDN19 без поражения глаз.</p></abstract><trans-abstract xml:lang="en"><p>Familial hypomagnesemia with hypercalciuria and nephrocalcinosis (FHHNC) is a rare autosomal recessive disorder of the renal tubules caused by mutations in the CLDN 16 or CLDN19 genes encoding the proteins claudin-16 and claudin-19. CLDN 16 or CLDN19 play an important role in the cellular transport of magnesium and calcium in the thick ascending limb of the loop of Henle and are responsible for most of the tubular magnesium reabsorption. FHHNC is characterized by hypomagnesemia, hypercalciuria, medullary nephrocalcinosis, and eye involvement, and progresses to chronic renal failure requiring dialysis and kidney transplantation, mainly in young adults. A clinical case of rapidly progressive renal function decline in a patient with mutations in the CLDN19 gene without ocular involvement is demonstrated.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>CLDN16</kwd><kwd>CLDN19</kwd><kwd>гипомагниемия</kwd><kwd>гиперкальциурия</kwd><kwd>нефрокальциноз</kwd></kwd-group><kwd-group xml:lang="en"><kwd>CLDN16</kwd><kwd>CLDN19</kwd><kwd>hypomagnesemia</kwd><kwd>hypercalcemia</kwd><kwd>nephrocalcinosis</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">Vall-Palomar M, Madariaga L, Ariceta G. Familial hypomagnesemia with hypercalciuria and nephrocalcinosis. Pediatr Nephrol 2021;36(10):3045–3055. doi:10.1007/s00467-021-04968-2</mixed-citation><mixed-citation xml:lang="en">Vall-Palomar M, Madariaga L, Ariceta G. Familial hypomagnesemia with hypercalciuria and nephrocalcinosis. 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