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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">actabiomedica</journal-id><journal-title-group><journal-title xml:lang="ru">Acta Biomedica Scientifica</journal-title><trans-title-group xml:lang="en"><trans-title>Acta Biomedica Scientifica</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2541-9420</issn><issn pub-type="epub">2587-9596</issn><publisher><publisher-name>Scientific Centre for Family Health and Human Reproduction Problems</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29413/ABS.2021-6.6-2.7</article-id><article-id custom-type="elpub" pub-id-type="custom">actabiomedica-3141</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>НЕВРОЛОГИЯ И НЕЙРОХИРУРГИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>NEUROLOGY AND NEUROSURGERY</subject></subj-group></article-categories><title-group><article-title>Активность генов матричных металлопротеиназ и их ингибиторов в Ligamentum flavum пациентов со стенозирующими процессами позвоночного канала и дурального мешка</article-title><trans-title-group xml:lang="en"><trans-title>Activity of genes of matrix metalloproteinases and their inhibitors in the Ligamentum flavum of patients with stenosing processes in spinal canal and dural sac</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5080-9225</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Родионова</surname><given-names>Л. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Rodionova</surname><given-names>L. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p> кандидат биологических наук, заведующая лабораторией клеточной патофизиологии и биохимии; доцент кафедры лучевой и клинической лабораторной диагностики</p><p>664003, г. Иркутск, ул. Борцов Революции, 1, Россия</p><p>664049, г. Иркутск, Юбилейный, 100, Россия</p></bio><bio xml:lang="en"><p> Cand. Sc. (Biol.), Head of the Laboratory of Cell Pathophysiology and Biochemistry; Associate Professor at the Department of X-Ray and Clinical Laboratory Diagnostics</p><p>Bortsov Revolyutsii str. 1, Irkutsk 664003, Russian Federation </p><p>Yubileyniy 100, Irkutsk 664049, Russian Federation </p></bio><email xlink:type="simple">greidmacho@yandex.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/0000-0003-4482-6130</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Самойлова</surname><given-names>Л. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Samoilova</surname><given-names>L. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p> младший научный сотрудник лаборатории клеточной патофизиологии и биохимии</p><p>664003, г. Иркутск, ул. Борцов Революции, 1, Россия</p></bio><bio xml:lang="en"><p> Junior Research Officer at the Laboratory of Cell Pathophysiology and Biochemistry</p><p>Bortsov Revolyutsii str. 1, Irkutsk 664003, Russian Federation </p></bio><email xlink:type="simple">popovalg@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/0000-0002-9008-6383</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сороковиков</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Sorokovikov</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p> доктор медицинских наук, профессор, директор; заведующий кафедрой травматологии, ортопедии и нейрохирургии</p><p>664003, г. Иркутск, ул. Борцов Революции, 1, Россия</p><p>664049, г. Иркутск, Юбилейный, 100, Россия</p></bio><bio xml:lang="en"><p> Dr. Sc. (Med.), Professor, Director; Head of the Department of Traumatology, Orthopedics and Neurosurgery </p><p> Bortsov Revolyutsii str. 1, Irkutsk 664003, Russian Federation </p><p> Yubileyniy 100, Irkutsk 664049, Russian Federation </p></bio><email xlink:type="simple">vasorokovikov@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБНУ «Иркутский научный центр хирургии и травматологии»;&#13;
Иркутская государственная медицинская академия последипломного образования – филиал ФГБОУ ДПО «Российская медицинская академия непрерывного профессионального образования» Минздрава России</institution></aff><aff xml:lang="en"><institution>Irkutsk Scientific Centre of Surgery and Traumatology;&#13;
Irkutsk State Medical Academy of Postgraduate Education – Branch Campus of the Russian Medical Academy of Continuing Professional Education </institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ФГБНУ «Иркутский научный центр хирургии и травматологии»</institution></aff><aff xml:lang="en"><institution>Irkutsk Scientific Centre of Surgery and Traumatology</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>28</day><month>12</month><year>2021</year></pub-date><volume>6</volume><issue>6-2</issue><fpage>58</fpage><lpage>72</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Родионова Л.В., Самойлова Л.Г., Сороковиков В.А., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Родионова Л.В., Самойлова Л.Г., Сороковиков В.А.</copyright-holder><copyright-holder xml:lang="en">Rodionova L.V., Samoilova L.G., Sorokovikov V.A.</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://www.actabiomedica.ru/jour/article/view/3141">https://www.actabiomedica.ru/jour/article/view/3141</self-uri><abstract><p>Получены новые данные по экспрессии генов металлопротеиназ и их тканевых ингибиторов (MMP-1, MMP-2, MMP-3, MMP-8, MMP-9, TIMP-1 и TIMP-2) в Ligamentum flavum пациентов со стенозирующими процессами позвоночного канала и дурального мешка на поясничном уровне. Выявлены особенности метаболизма внеклеточного матрикса (ВКМ). Полученные данные сопоставлены с ранее исследованными генами-кандидатами. Произведён поиск взаимосвязей с особенностями метаболических характеристик внеклеточного матрикса.Цель работы. Изучить экспрессию генов металлопротеиназ и их тканевых ингибиторов в интраоперационных биоптатах Ligamentum flavum пациентов со стенозами позвоночного канала и дурального мешка в поясничном отделе позвоночника.Материалы и методы. Обследована группа из 33 человек со стенозами позвоночного канала и дурального мешка, локализованными в поясничном отделе (17 женщин и 16 мужчин; средний возраст – 45,73 ± 1,95 года). Из интраоперационных биоптатов Ligamentum flavum выделяли РНК и после проведения обратной транскрипции ставили ПЦР со специфичными праймерами.Результаты. В Ligamentum flavum при стенозирующих процессах позвоночного канала и дурального мешка обнаружены повышенная активность ММР-1 и недостаточный ответ на это TIMP-1 и TIMP-2; экспрессия ММР-1 возрастала синхронно с Dio2, и оба гена снижали свою активность с увеличением возраста пациента. У пациентов с наличием оссификации Ligamentum flavum более активно экспрессировался ген ММР-8 и снижался синтез мРНК гена ММР-9 по сравнению с подгруппой без оссификации.</p></abstract><trans-abstract xml:lang="en"><p>New data have been obtained for assessing the expression of genes of metalloproteinases and their tissue inhibitors (MMP-1, MMP-2, MMP-3, MMP-8, MMP-9, TIMP-1 and TIMP-2) in the Ligamentum flavum in patients with lumbar stenosis of spinal canal and dural sac. The features of the metabolism of the extracellular matrix (ECM) were revealed, the data obtained were compared with those for previously studied candidate genes. The search for relationships with the features of the ECM metabolic characteristics was carried out.The aim. To study the expression of genes of metalloproteinases and their tissue inhibitors in intraoperative biopsies of the Ligamentum flavum of patients with lumbar stenosis of the spinal canal and dural sac.Materials and methods. A group of 33 people (17 women, 16 men) with lumbar stenosis of the spinal canal and dural sac was studied; the average age is 45.73 ± 1.95 years. RNA was isolated from intraoperative biopsies of the Ligamentum flavum, reverse transcription was performed, and PCR using specific primers was performed.Results. In Ligamentum flavum of patients with stenosing processes of the spinal canal and dural sac, an increased activity of MMP-1 and insufficient response of TIMP-1 and TIMP-2 were found; the expression of MMP-1 increased synchronously with Dio2, and both genes decreased their activity with increasing age of the patient. In patients with Ligamentum flavum ossification, the MMR-8 gene was more actively expressed, and the synthesis of the mRNA of the MMR-9 gene decreased compared to the subgroup without ossification.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>стеноз позвоночного канала</kwd><kwd>Ligamentum flavum</kwd><kwd>экспрессия генов</kwd><kwd>металлопротеиназы</kwd><kwd>MMP-1</kwd><kwd>MMP-2</kwd><kwd>MMP-3</kwd><kwd>MMP-8</kwd><kwd>MMP-9</kwd><kwd>TIMP-1</kwd><kwd>TIMP-2</kwd><kwd>тканевые ингибиторы металлопротеиназ</kwd></kwd-group><kwd-group xml:lang="en"><kwd>spinal canal stenosis</kwd><kwd>Ligamentum flavum</kwd><kwd>gene expression</kwd><kwd>metalloproteinases</kwd><kwd>MMP-1</kwd><kwd>MMP-2</kwd><kwd>MMP-3</kwd><kwd>MMP-8</kwd><kwd>MMP-9</kwd><kwd>TIMP-1</kwd><kwd>TIMP-2</kwd><kwd>tissue inhibitors of metalloproteinases</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">Silagi ES, Shapiro IM, Risbud MV. Glycosaminoglycan synthesis in the nucleus pulposus: Dysregulation and the pathogenesis of disc degeneration. Matrix Biol. 2018; 71-72: 368-379. doi: 10.1016/j.matbio.2018.02.025</mixed-citation><mixed-citation xml:lang="en">Silagi ES, Shapiro IM, Risbud MV. Glycosaminoglycan synthesis in the nucleus pulposus: Dysregulation and the pathogenesis of disc degeneration. Matrix Biol. 2018; 71-72: 368-379. doi: 10.1016/j.matbio.2018.02.025</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Yu L, Sun ZJ, Tan QC, Wang S, Wang WH, Yang XQ, et al. Thermosensitive injectable decellularized nucleus pulposus hydrogel as an ideal biomaterial for nucleus pulposus regeneration. J Biomater Appl Actions. 2020; 35(2): 182-192. doi: 10.1177/0885328220921328</mixed-citation><mixed-citation xml:lang="en">Yu L, Sun ZJ, Tan QC, Wang S, Wang WH, Yang XQ, et al. Thermosensitive injectable decellularized nucleus pulposus hydrogel as an ideal biomaterial for nucleus pulposus regeneration. J Biomater Appl Actions. 2020; 35(2): 182-192. doi: 10.1177/0885328220921328</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Henry N, Clouet J, le Bideau J, le Visage C, Guicheux J. Innovative strategies for intervertebral disc regenerative medicine: From cell therapies to multiscale delivery systems. Biotechnol Adv. 2018; 36(1): 281-294. doi: 10.1016/j.biotechadv.2017.11.009</mixed-citation><mixed-citation xml:lang="en">Henry N, Clouet J, le Bideau J, le Visage C, Guicheux J. Innovative strategies for intervertebral disc regenerative medicine: From cell therapies to multiscale delivery systems. Biotechnol Adv. 2018; 36(1): 281-294. doi: 10.1016/j.biotechadv.2017.11.009</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Van Lint P, Libert C. Chemokine and cytokine processing by matrix metalloproteinases and its effect on leukocyte migration and inflammation. J Leukoc Biol. 2007; 82(6): 1375-1381. doi: 10.1189/jlb.0607338</mixed-citation><mixed-citation xml:lang="en">Van Lint P, Libert C. Chemokine and cytokine processing by matrix metalloproteinases and its effect on leukocyte migration and inflammation. J Leukoc Biol. 2007; 82(6): 1375-1381. doi: 10.1189/jlb.0607338</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Шурыгин М.Г., Шурыгина И.А., Дремина Н.Н., Каня О.В. Матриксная металлопротеаза 9 и ремоделирование при инфаркте миокарда. Acta biomedica scientifica. 2013; 90(2-1): 138-141.</mixed-citation><mixed-citation xml:lang="en">Shurygin MG, Shurygina IA, Dremina NN, Kanya OV. Matrix metalloprotease 9 and remodeling in myocardial infarction. Acta biomedica scientifica. 2013; 90(2-1): 138-141. (In Russ.).</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Shurygina IA, Rodionova LV, Ayushinova NI, Chepurnykh EE, Trukhan IS, Shurygin MG. The effect of the p38 MAPK inhibitor on the expression of metalloproteinases and their inhibitors during the formation of abdominal adhesions. Int J Biomed. 2021; (4).</mixed-citation><mixed-citation xml:lang="en">Shurygina IA, Rodionova LV, Ayushinova NI, Chepurnykh EE, Trukhan IS, Shurygin MG. The effect of the p38 MAPK inhibitor on the expression of metalloproteinases and their inhibitors during the formation of abdominal adhesions. Int J Biomed. 2021; (4).</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Kamieniak P, Bielewicz J, Kurzepa J, Daniluk B, Kocot J, Trojanowski T. The impact of changes in serum levels of metalloproteinase-2 and metalloproteinase-9 on pain perception in patients with disc herniation before and after surgery. J Pain Res. 2019; 12: 1457-1464. doi: 10.2147/JPR.S201199</mixed-citation><mixed-citation xml:lang="en">Kamieniak P, Bielewicz J, Kurzepa J, Daniluk B, Kocot J, Trojanowski T. The impact of changes in serum levels of metalloproteinase-2 and metalloproteinase-9 on pain perception in patients with disc herniation before and after surgery. J Pain Res. 2019; 12: 1457-1464. doi: 10.2147/JPR.S201199</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Xue M, March L, Sambrook PN, Jackson CJ. Differential regulation of matrix metalloproteinase 2 and matrix metalloproteinase 9 by activated protein C: Relevance to inflammation in rheumatoid arthritis. Arthritis Rheum. 2007; 56(9): 2864-2874. doi: 10.1002/art.22844</mixed-citation><mixed-citation xml:lang="en">Xue M, March L, Sambrook PN, Jackson CJ. Differential regulation of matrix metalloproteinase 2 and matrix metalloproteinase 9 by activated protein C: Relevance to inflammation in rheumatoid arthritis. Arthritis Rheum. 2007; 56(9): 2864-2874. doi: 10.1002/art.22844</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Ярмолинская М.И., Молотков А.С., Денисова В.М. Матриксные металлопротеиназы и ингибиторы: классификация, механизм действия. Журнал акушерства и женских болезней. 2012; LXI(1): 113-125.</mixed-citation><mixed-citation xml:lang="en">Yarmolinskaya MI, Molotkov AS, Denisova VM. Matrix metalloproteinases and inhibitors: classification, mechanism of action. Journal of Obstetrics and Women’s Diseases.2012; LXI(1): 113-125. (In Russ.).</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Родионова Л.В., Самойлова Л.Г., Шурыгина И.А., Скляренко О.В., Животенко А.П., Кошкарева З.В., и др. Особенности реакций ацетилирования у больных со стенозирующим процессом позвоночного канала и дурального мешка поясничного отдела позвоночника в зависимости от выраженности оссификации Ligamentum flavum. Патогенез. 2020; 18(3): 45-52. doi: 10.25557/2310-0435.2020.03.45-52</mixed-citation><mixed-citation xml:lang="en">Rodionova LV, Samoilova LG, Shurygina IA, Sklyarenko OV, Zhivotenko AP, Koshkareva ZV, et al. Characteristic of acetylation reactions in patients with stenosing process of the lumbar spinal canal and dural sac depending on the severity of Ligamentum flavum ossification. Pathogenesis. 2020; 18(3): 45-52. (In Russ.). doi: 10.25557/2310-0435.2020.03.45-52</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Родионова Л.В., Самойлова Л.Г., Невежина А.В., Шурыгина И.А. Экспрессия генов дейодиназ в интраоперационных образцах Ligamentum flavum пациентов со стенозирующими процессами позвоночного канала и дурального мешка на поясничном отделе позвоночника. Acta biomedica scientifica. 2019; 4(6): 20-25. doi: 10.29413/ABS.2019-4.6.3</mixed-citation><mixed-citation xml:lang="en">Rodionova LV, Samoilova LG, Nevezhina AV, Shurygina IA. Expression of deiodinase genes in intraoperative Ligamentum flavum in patients with stenotic processes of the spinal canal and dural sac on the lumbar spine. Acta biomedica scientifica. 2019; 4(6): 20-25. (In Russ.). doi: 10.29413/ABS.2019-4.6.3</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Родионова Л.В., Самойлова Л.Г., Сороковиков В.А. Активность генов рецепторов к паратиреоидному гормону в биоптатах Ligamentum flavum пациентов со стенозирующими процессами позвоночного канала и дурального мешка на поясничном уровне. Acta biomedica scientifica. 2020; 5(6): 113-123. doi: 10.29413/ABS.2020-5.6.13</mixed-citation><mixed-citation xml:lang="en">Rodionova LV, Samoilova LG, Sorokovikov VA. Activity of parathyroid hormone receptor genes in Ligamentum flavum biopsies of patients with spinal canal and dural sac stenosis at the lumbar level. Acta biomedica scientifica. 2020; 5(6): 113-123. (In Russ.). doi: 10.29413/ABS.2020-5.6.13</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">National Center for Biotechnological Information. URL: https://https.ncbi.nlm.nih.gov [date of access: 01.11.2021].</mixed-citation><mixed-citation xml:lang="en">National Center for Biotechnological Information. URL: https://https.ncbi.nlm.nih.gov [date of access: 01.11.2021].</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Hsu HT, Yue CT, Teng MS, Tzeng IS, Li TC, Tai PA, et al. Immuohistochemical score of matrix metalloproteinase-1 may indicate the severity of symptomatic cervical and lumbar disc degeneration. Spine J. 2020; 20(1): 124-137. doi: 10.1016/j.spinee.2019.08.004</mixed-citation><mixed-citation xml:lang="en">Hsu HT, Yue CT, Teng MS, Tzeng IS, Li TC, Tai PA, et al. Immuohistochemical score of matrix metalloproteinase-1 may indicate the severity of symptomatic cervical and lumbar disc degeneration. Spine J. 2020; 20(1): 124-137. doi: 10.1016/j.spinee.2019.08.004</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Xu D, Sun Y, Bao G, Liu W, Zhu X, Cui S, et al. MMP-1 overexpression induced by IL-1β: Possible mechanism for inflammation in degenerative lumbar facet joint. J Orthop Sci. 2013; 18(6): 1012-1019. doi: 10.1007/s00776-013-0466-2</mixed-citation><mixed-citation xml:lang="en">Xu D, Sun Y, Bao G, Liu W, Zhu X, Cui S, et al. MMP-1 overexpression induced by IL-1β: Possible mechanism for inflammation in degenerative lumbar facet joint. J Orthop Sci. 2013; 18(6): 1012-1019. doi: 10.1007/s00776-013-0466-2</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Kim HJ, Park JB, Won HY, Chang H. Serum levels of TGFbeta1, TIMP-1 and TIMP-2 in patients with lumbar spinal stenosis and disc herniation. Asian Spine J. 2007; 1(1): 8-11. doi: 10.4184/asj.2007.1.1.8</mixed-citation><mixed-citation xml:lang="en">Kim HJ, Park JB, Won HY, Chang H. Serum levels of TGFbeta1, TIMP-1 and TIMP-2 in patients with lumbar spinal stenosis and disc herniation. Asian Spine J. 2007; 1(1): 8-11. doi: 10.4184/asj.2007.1.1.8</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Lindberg RL, Sorsa T, Tervahartiala T, Hoffmann F, Mellanen L, Kappos L, et al. Gelatinase B [matrix metalloproteinase (MMP)-9] and collagenases (MMP-8/-13) are upregulated in cerebrospinal fluid during aseptic and bacterial meningitis in children. Neuropathol Appl Neurobiol. 2006; 32(3): 304-317. doi: 10.1111/j.1365-2990.2006.00729.x</mixed-citation><mixed-citation xml:lang="en">Lindberg RL, Sorsa T, Tervahartiala T, Hoffmann F, Mellanen L, Kappos L, et al. Gelatinase B [matrix metalloproteinase (MMP)-9] and collagenases (MMP-8/-13) are upregulated in cerebrospinal fluid during aseptic and bacterial meningitis in children. Neuropathol Appl Neurobiol. 2006; 32(3): 304-317. doi: 10.1111/j.1365-2990.2006.00729.x</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Leppert D, Leib SL, Grygar C, Miller KM, Schaad UB, Holländer GA. Matrix metalloproteinase (MMP)-8 and MMP-9 in cerebrospinal fluid during bacterial meningitis: Association with blood-brain barrier damage and neurological sequelae. Clin Infect Dis. 2000; 31(1): 80-84. doi: 10.1086/313922</mixed-citation><mixed-citation xml:lang="en">Leppert D, Leib SL, Grygar C, Miller KM, Schaad UB, Holländer GA. Matrix metalloproteinase (MMP)-8 and MMP-9 in cerebrospinal fluid during bacterial meningitis: Association with blood-brain barrier damage and neurological sequelae. Clin Infect Dis. 2000; 31(1): 80-84. doi: 10.1086/313922</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
