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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">hfb</journal-id><journal-title-group><journal-title xml:lang="ru">Health, Food &amp; Biotechnology</journal-title><trans-title-group xml:lang="en"><trans-title>Health, Food &amp; Biotechnology</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2712-7648</issn><publisher><publisher-name>РОСБИОТЕХ</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.36107/hfb.2025.i4.s275</article-id><article-id custom-type="elpub" pub-id-type="custom">hfb-275</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>БИОТЕХНОЛОГИИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>BIOTECHNOLOGY</subject></subj-group></article-categories><title-group><article-title>Использование гидролизата кератина, полученного микробной конверсией куриного пера, вкосметической сыворотке для ухода за волосами</article-title><trans-title-group xml:lang="en"><trans-title>The Use of Keratin Hydrolysate Obtained by Microbial Conversion of Chicken Feathers as Part of a Cosmetic Serum for Hair Care</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1687-9801</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бетехтин</surname><given-names>Кирилл Эдуардович</given-names></name><name name-style="western" xml:lang="en"><surname>Betekhtin</surname><given-names>Kirill E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>аспирант кафедры "Биотехнология и биоорганический синтез"</p></bio><email xlink:type="simple">r9d2@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/0000-0002-0015-446X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Вольнова</surname><given-names>Екатерина Романовна</given-names></name><name name-style="western" xml:lang="en"><surname>Volnova</surname><given-names>Ekaterina R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>и.о. зав. каф. "Биотехнология и биоорганический синтез", к.т.н.</p></bio><email xlink:type="simple">volnovaer@mgupp.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/0009-0002-8292-0419</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Розанцева</surname><given-names>Любовь Эдурдовна</given-names></name><name name-style="western" xml:lang="en"><surname>Rozantseva</surname><given-names>Lyubov E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>доцент кафедры "Биотехнология и биоорагнический синтез", к.х.н.</p></bio><email xlink:type="simple">RozancevaLE@mgupp.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/0000-0002-9287-0585</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Машенцева</surname><given-names>Наталья Геннадьевна</given-names></name><name name-style="western" xml:lang="en"><surname>Mashentseva</surname><given-names>Natalia G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>профессор кафедры "Биотехнология и биоорганический синтез", д.т.н.</p></bio><email xlink:type="simple">natali-mng@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Российский биотехнологический университет (РОСБИОТЕХ)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Russian Biotechnological University (BIOTECH University), Moscow, Russia</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>07</day><month>01</month><year>2026</year></pub-date><volume>7</volume><issue>4</issue><fpage>37</fpage><lpage>55</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Бетехтин К.Э., Вольнова Е.Р., Розанцева Л.Э., Машенцева Н.Г., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Бетехтин К.Э., Вольнова Е.Р., Розанцева Л.Э., Машенцева Н.Г.</copyright-holder><copyright-holder xml:lang="en">Betekhtin K.E., Volnova E.R., Rozantseva L.E., Mashentseva N.G.</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.hfb-journal.ru/jour/article/view/275">https://www.hfb-journal.ru/jour/article/view/275</self-uri><abstract><sec><title>Введение</title><p>Введение. Гидролизаты кератина эффективно восстанавливают структуру волос, формируя защитную пленку и придавая им эластичность. Традиционные химические методы получения кератина неэкологичны, тогда как биотехнологический подход с использованием кератинолитических микроорганизмов представляет собой экологически устойчивую альтернативу. Однако доступность промышленных кератиназ ограничена: на мировом рынке представлено лишь несколько препаратов, а в России — это единственный препарат «Кератиназа» компании ООО «Торговый дом „Биопрепарат“».</p></sec><sec><title>Цель</title><p>Цель. Разработать биотехнологический метод получения гидролизата кератина с использованием новых штаммов B. licheniformis БАЛ-1 и БАЛ-2 и оценить его эффективность в составе косметической сыворотки для волос.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. Исследование проводили с использованием штаммов B. licheniformis БАЛ-1 и БАЛ-2, куриных перьев бройлеров (влажность 75 %), клеточных линий SPEV и MDBK для биотестирования</p><p>Культивирование осуществляли на модифицированной среде с пером (5 г/100 мл) при 28 °C и 80 об/мин в течение 72 ч. Оптимизировали следующие параметры: температуру (20–40 °C), перемешивание (80–160 об/мин), содержание пера (5–20 г), добавление в питательную среду мочевины (до 8 г). Кератиназную активность определяли спектрофотометрически.</p></sec><sec><title>Результаты</title><p>Результаты. Оптимизация условий повысила кератиназную активность в 2,4 раза: до 39 КА/см³ (БАЛ-1) и 44 КА/см³ (БАЛ-2). Гидролизат показал безопасность на клеточных линиях SPEV и MDBK (жизнеспособность клеток ≥65 %). Разработанная сыворотка (3 % гидролизата) при тестировании на фокус-группе (n = 5, 2 месяца) улучшила состояние волос: 100 % участниц отметили повышение гладкости, 80 % — улучшение упругости и блеска.</p></sec><sec><title>Выводы</title><p>Выводы. Разработанный метод ферментативного гидролиза перьев эффективен для создания косметического ингредиента — гидролизата кератина. Дальнейшие исследования будут направлены на определение биологически активных пептидов в перьевом гидролизате и оценку их вклада в повышение эффективности косметической сыворотки для волос.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Introduction. Keratin hydrolysates have been shown to be effective in restoring hair structure, forming a protective film, and providing elasticity. Traditional chemical methods for producing keratin, however, are not environmentally friendly. A biotechnological approach using keratinolytic microorganisms presents a more sustainable alternative. Although several keratinase drugs are available on the market, only one is produced in Russia, by Biopreparat Trading House.</title></sec><sec><title>Purpose. This study aims to develop a biotechnological method for producing keratin hydrolysate using two newly isolated strains of Bacillus licheniformis, BAL-1 and BAL-2, and to assess its efficacy in a cosmetic hair serum formulation.</title></sec><sec><title>Materials and methods. Bacillus licheniformis strains BAL-1 and BAL-2 were used for the study. Chicken feathers with a moisture content of 75% were used as a source of keratin. SPEV and MDBK cell lines were employed for biotesting.</title></sec><sec><title>Cultivation was carried out on a modified medium with feather at 5 g/100 ml at 28°C and 80 rpm for 72 hours. The parameters were optimized to include temperature (20-40°C), stirring (80-160 rpm), feather content (5-20 g), and adding up to 8 g of urea to the nutrient medium. Keratinase activity was determined spectrophotometrically.</title></sec><sec><title>Results. Optimization of the conditions resulted in an increase in keratinase activity by 2.4 times, up to 39 KA/cm³ for BAL-1 and 44 KA/cm³ for BAL-2. The hydrolysate was safe for use on SPEV and MDBK cell lines, with cell viability ≥65%. The serum (containing 3% hydrolysate) improved hair condition in a focus group of 5 people over 2 months, with 100% reporting increased smoothness and 80% reporting elasticity and shine.</title></sec><sec><title>Conclusions. The developed method of enzymatic hydrolysis of feathers has been shown to be effective in creating a cosmetic ingredient, keratin hydrolysate. Future research will focus on identifying biologically active peptides in feather hydrolysate and assessing their potential contribution to the efficacy of cosmetic hair serums.</title></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>биоконверсия</kwd><kwd>B. licheniformis</kwd><kwd>кератиназная активность</kwd><kwd>биотестирование</kwd><kwd>косметическая сыворотка</kwd><kwd>микроскопия</kwd><kwd>трихоскопия.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>bioconversion</kwd><kwd>Bacillus licheniformis</kwd><kwd>keratinase activity</kwd><kwd>biotesting</kwd><kwd>cosmetic serum</kwd><kwd>microscopy</kwd><kwd>trichoscopy</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">-</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">Бетехтин, К. Э., Сазонова, О. И., Соколов, С. Л., Ковалев, Л. И., Ковалева, М. А., Машенцева, Н. Г., &amp; Неретина, А. 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