Article(id=1320883842693579159, tenantId=1146029695717560320, journalId=1260987677001138203, issueId=1320881884691808691, articleNumber=null, orderNo=null, doi=10.13386/j.issn1002-0306.2025060343, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1750867200000, receivedDateStr=2025-06-26, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1792852848932, onlineDateStr=2026-10-24, pubDate=1782835200000, pubDateStr=2026-07-01, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1792852848932, onlineIssueDateStr=2026-10-24, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1792852848932, creator=13701087609, updateTime=1792852848932, updator=13701087609, issue=Issue{id=1320881884691808691, tenantId=1146029695717560320, journalId=1260987677001138203, year='2026', volume='47', issue='13', pageStart='1', pageEnd='522', issueExtLink='null', onlineDate='null', pubDate='1782835200000', pubDateStr='2026-07-01', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1792852382109, creator='13701087609', updateTime=1792852382109, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext=null, issueFiles=null, downloadFileDto=null}, startPage=185, endPage=192, ext={EN=ArticleExt(id=1320883842899100056, articleId=1320883842693579159, tenantId=1146029695717560320, journalId=1260987677001138203, language=EN, title=Screening and Probiotic Characterization of Lactobacillus acidophilus CCNH655 and Its Potential Role in Regulating Glucose and Lipid Metabolism, columnId=1261336275769016441, journalTitle=Science and Technology of Food Industry, columnName=Bioengineering, runingTitle=null, highlight=null, articleAbstract=

Objective: This study aimed to isolate and screen probiotic strains with excellent probiotic properties and metabolic regulatory functions (hypoglycemic and hypocholesterolemic activities) from fermented camel milk in Xinjiang. Methods: Firstly, lactic acid bacteria were isolated and purified from Xinjiang fermented camel milk using traditional microbial isolation techniques. Their potential probiotic properties were systematically evaluated via assays of simulated artificial gastric juice tolerance, bile salt tolerance, auto-aggregation ability, and hydrophobicity. Furthermore, the in vitro hypoglycemic potential was assessed using α-glucosidase inhibition rate and α-amylase inhibition rate as core indicators, while the in vitro hypocholesterolemic efficacy was evaluated based on key parameters including glycine/taurine bile salt hydrolase activity and cholesterol degradation rate. Finally, the antibacterial ability and biological safety of the candidate strain was comprehensively evaluated through antibacterial spectrum determination, hemolysis test, and antibiotic sensitivity test. Results: A total of multiple lactic acid bacteria strains were successfully isolated from the fermented camel milk. After primary screening, 10 candidate strains with strong tolerance to simulated artificial gastric juice (pH3.0) and bile salts (0.2%) were obtained, among which 6 strains exhibited excellent in vitro adhesion ability. Through secondary screening, one Lactobacillus acidophilus strain (designated CCNH655) was ultimately selected. This strain simultaneously displayed superior hypoglycemic activity (as indicated by α-glucosidase inhibition rate 67.19%±5.38% and α-amylase inhibition rate 86.75%±4.34%) and hypocholesterolemic efficacy (reflected by glycine bile salt hydrolase activity 3.89±0.35 U/mL, taurine bile salt hydrolase activity 6.91±0.48 U/mL, and cholesterol degradation rate 79.39%±4.76%) functions. Additionally, it showed a relatively broad antibacterial spectrum, no hemolytic activity, and sensitivity to 9 antibiotics, thus meeting the safety evaluation standards for probiotics. Conclusion: L. acidophilus CCNH655 possesses excellent probiotic properties, significant metabolic regulatory functions, and favorable biological safety. It provides an important strain resource and scientific support for the development of novel functional probiotic products and fermented dairy products targeting the improvement of glucose and lipid metabolism.

, authors=Xin YANG, Juan YANG, Jiahao HUANG, Xinyi CHEN, Xiaowei ZHENG*, authorsList=Xin YANG, Juan YANG, Jiahao HUANG, Xinyi CHEN, Xiaowei ZHENG, authorCompany=null, correspAuthors=Xiaowei ZHENG, authorNote=null, correspAuthorsNote=null, copyrightStatement=Copyright © 2026 Science and Technology of Food Industry. All rights reserved., copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1320883845176607133, articleId=1320883842693579159, tenantId=1146029695717560320, journalId=1260987677001138203, language=CN, title=一株新型嗜酸乳杆菌CCNH655的筛选及其在糖脂代谢调控中的益生功能研究, columnId=1261336277547401341, journalTitle=食品工业科技, columnName=生物工程, runingTitle=null, highlight=null, articleAbstract=

目的:本研究旨在从新疆发酵酸驼乳中分离筛选具有优良益生特性与代谢调节功能(降血糖、降血脂)的益生菌菌株。方法:首先,采用传统微生物分离技术从新疆发酵酸驼乳中分离纯化乳酸菌;通过模拟人工胃液、胆盐耐受性、自聚集能力及疏水性检测,系统评估菌株的潜在益生特性;进一步以α-葡萄糖苷酶抑制率、α-淀粉酶抑制率为核心指标评价菌株的体外降血糖潜力,以甘氨酸/牛磺酸胆汁盐水解酶活性及胆固醇降解率为关键参数评估菌株的体外降血脂功效;最后,通过抑菌谱测定、溶血性试验及抗生素敏感测试,综合评价候选菌株的抑菌能力与生物安全性。结果:从新疆发酵酸驼乳中成功分离获得多株乳酸菌,经初筛获得10株具有较强人工胃液(pH3.0)与胆盐(0.2%)耐受性的候选菌株,其中6株表现出优异的体外黏附能力;经复筛最终获得1株嗜酸乳杆菌(编号CCNH655),该菌株同时具备较优的降血糖(α-葡萄糖苷酶抑制率67.19%±5.38%、α-淀粉酶抑制率86.75%±4.34%)与降血脂(甘氨酸胆汁盐水解酶活性3.89±0.35 U/mL、胆汁盐水解酶活性6.91±0.48 U/mL、胆固醇降解率79.39%±4.76%)功能,且具有较广泛的抑菌谱,无溶血现象,并对9种抗生素呈敏感型,符合益生菌安全性评价标准。结论:嗜酸乳杆菌CCNH655兼具优良的益生特性、显著的代谢调节功能及良好的生物安全性,为开发靶向改善糖脂代谢的新型功能性益生菌产品及发酵乳制品提供了重要的菌株资源与科学支撑。

, authors=杨鑫, 杨娟, 黄佳豪, 陈欣怡, 郑晓卫*, authorsList=杨鑫, 杨娟, 黄佳豪, 陈欣怡, 郑晓卫, authorCompany=null, correspAuthors=郑晓卫, authorNote=

杨鑫(1991−),女,硕士研究生,研究方向:功能微生物筛选,E-mail:

, correspAuthorsNote=
郑晓卫(1981−),女,博士,正高级工程师,研究方向:微生物应用研究,E-mail:。
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杨鑫(1991−),女,硕士研究生,研究方向:功能微生物筛选,E-mail:

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Chinese Journal of Microecology, 2024, 36(4): 401−407,413., articleTitle=null, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1320883845403099550, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320883842693579159, xref=null, ext=[AuthorCompanyExt(id=1320883845411488159, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320883842693579159, companyId=1320883845403099550, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=Nutrition & Health Research Institute, COFCO Corporation, Beijing 102200, China), AuthorCompanyExt(id=1320883845419876768, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320883842693579159, companyId=1320883845403099550, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=中粮营养健康研究院有限公司,北京 102200)])], figs=[ArticleFig(id=1320883850998301124, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320883842693579159, language=EN, label=Fig.1, caption=16S rDNA sequence phylogenetic tree of L. acidophilus CCNH655, figureFileSmall=fU6mBI+Wyewotlhn4mqgow==, figureFileBig=JJDPAuNaNTA0/m5dPxWrQg==, tableContent=null), ArticleFig(id=1320883851077992901, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320883842693579159, language=CN, label=图1, caption=嗜酸乳杆菌CCNH655 16S rDNA序列系统发育树, figureFileSmall=fU6mBI+Wyewotlhn4mqgow==, figureFileBig=JJDPAuNaNTA0/m5dPxWrQg==, tableContent=null), ArticleFig(id=1320883851296096710, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320883842693579159, language=EN, label=Fig.2, caption=Hemolysis of L. acidophilus CCNH655, figureFileSmall=2nJLSJiR4g+Cz/lVExFB1A==, figureFileBig=TbDXnSwu5UxBu4FWA35KlA==, tableContent=null), ArticleFig(id=1320883851363205575, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320883842693579159, language=CN, label=图2, caption=嗜酸乳杆菌CCNH655溶血情况, figureFileSmall=2nJLSJiR4g+Cz/lVExFB1A==, figureFileBig=TbDXnSwu5UxBu4FWA35KlA==, tableContent=null), ArticleFig(id=1320883851430314440, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320883842693579159, language=EN, label=Table 1, caption=

Tolerance of 20 probiotic strains to artificial gastric juice and bile salts

, figureFileSmall=null, figureFileBig=null, tableContent=
菌株编号耐胃酸存活率(%)耐胆盐存活率(%)
MRS186.19±5.50abc51.28±2.74bc
MRS292.94±3.78ab44.96±2.57c
MRS350.00±1.86d9.38±0.32e
MRS495.88±2.99a50.89±1.76bc
MRS531.25±1.20e24.31±0.58d
MRS697.27±4.02a26.05±1.17d
MRS71.37±0.04g38.92±1.51cd
MRS89.28±0.32f25.61±0.61d
MRS977.53±3.69bc50.64±2.32bc
MRS1088.00±2.93abc50.07±2.48bc
MRS1191.67±3.89ab17.82±0.21d
MRS1275.26±2.64bc50.00±1.77bc
MRS1360.00±2.85cd31.25±1.53cd
MRS1495.48±4.65a75.21±3.23a
MRS1573.33±1.95c52.33±1.21b
MRS1668.38±2.56c34.13±0.37cd
MRS1782.50±2.52bc56.85±2.55b
MRS1861.11±2.99cd9.90±0.48e
MRS1986.42±3.54abc51.37±1.18bc
MRS2076.29±1.71bc9.28±0.11e
), ArticleFig(id=1320883851493229001, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320883842693579159, language=CN, label=表1, caption=

20株益生菌人工胃液、胆盐耐受性

, figureFileSmall=null, figureFileBig=null, tableContent=
菌株编号耐胃酸存活率(%)耐胆盐存活率(%)
MRS186.19±5.50abc51.28±2.74bc
MRS292.94±3.78ab44.96±2.57c
MRS350.00±1.86d9.38±0.32e
MRS495.88±2.99a50.89±1.76bc
MRS531.25±1.20e24.31±0.58d
MRS697.27±4.02a26.05±1.17d
MRS71.37±0.04g38.92±1.51cd
MRS89.28±0.32f25.61±0.61d
MRS977.53±3.69bc50.64±2.32bc
MRS1088.00±2.93abc50.07±2.48bc
MRS1191.67±3.89ab17.82±0.21d
MRS1275.26±2.64bc50.00±1.77bc
MRS1360.00±2.85cd31.25±1.53cd
MRS1495.48±4.65a75.21±3.23a
MRS1573.33±1.95c52.33±1.21b
MRS1668.38±2.56c34.13±0.37cd
MRS1782.50±2.52bc56.85±2.55b
MRS1861.11±2.99cd9.90±0.48e
MRS1986.42±3.54abc51.37±1.18bc
MRS2076.29±1.71bc9.28±0.11e
), ArticleFig(id=1320883851556143562, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320883842693579159, language=EN, label=Table 2, caption=

Evaluation results of in vitro adhesion ability of candidate strains

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菌株编号自聚集性(%)疏水性(%)
MRS16.37±0.32c6.83±0.62e
MRS249.08±4.32a32.19±1.61b
MRS454.37±3.26a39.69±3.93b
MRS935.18±2.46b19.05±2.00c
MRS1039.13±3.88b18.13±1.27c
MRS121.75±0.12c11.02±0.88d
MRS1459.41±4.16a50.21±2.51a
MRS151.89±0.18c6.76±0.41e
MRS178.90±0.71c12.67±1.14d
MRS1949.87±2.50a58.46±4.68a
), ArticleFig(id=1320883851627446731, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320883842693579159, language=CN, label=表2, caption=

候选菌株体外黏附能力评价结果

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菌株编号自聚集性(%)疏水性(%)
MRS16.37±0.32c6.83±0.62e
MRS249.08±4.32a32.19±1.61b
MRS454.37±3.26a39.69±3.93b
MRS935.18±2.46b19.05±2.00c
MRS1039.13±3.88b18.13±1.27c
MRS121.75±0.12c11.02±0.88d
MRS1459.41±4.16a50.21±2.51a
MRS151.89±0.18c6.76±0.41e
MRS178.90±0.71c12.67±1.14d
MRS1949.87±2.50a58.46±4.68a
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Hypoglycemic ability evaluation of candidate strains

, figureFileSmall=null, figureFileBig=null, tableContent=
菌株编号α-葡萄糖苷酶抑制率(%)α-淀粉酶抑制率(%)
MRS265.28±4.57a85.19±6.82ab
MRS465.89±3.29a75.34±6.78b
MRS1467.19±5.38a86.75±4.34a
MRS1966.58±5.99a77.15±5.40ab
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候选菌株降血糖能力评价

, figureFileSmall=null, figureFileBig=null, tableContent=
菌株编号α-葡萄糖苷酶抑制率(%)α-淀粉酶抑制率(%)
MRS265.28±4.57a85.19±6.82ab
MRS465.89±3.29a75.34±6.78b
MRS1467.19±5.38a86.75±4.34a
MRS1966.58±5.99a77.15±5.40ab
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Hypocholesterolemic ability evaluation of candidate strains

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菌株编号甘氨酸胆汁盐水
解酶活性(U/mL)
牛磺酸胆汁盐水
解酶活性(U/mL)
胆固醇降解率
(%)
MRS22.13±0.15b3.94±0.35b39.16±3.13b
MRS41.96±0.10b4.16±0.37b47.25±4.73b
MRS143.89±0.35a6.91±0.48a79.39±4.76a
MRS191.27±0.11c0.52±0.03c19.73±1.58c
), ArticleFig(id=1320883851900076495, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320883842693579159, language=CN, label=表4, caption=

候选菌株降胆固醇能力评价

, figureFileSmall=null, figureFileBig=null, tableContent=
菌株编号甘氨酸胆汁盐水
解酶活性(U/mL)
牛磺酸胆汁盐水
解酶活性(U/mL)
胆固醇降解率
(%)
MRS22.13±0.15b3.94±0.35b39.16±3.13b
MRS41.96±0.10b4.16±0.37b47.25±4.73b
MRS143.89±0.35a6.91±0.48a79.39±4.76a
MRS191.27±0.11c0.52±0.03c19.73±1.58c
), ArticleFig(id=1320883851958796752, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320883842693579159, language=EN, label=Table 5, caption=

Inhibitory effects of L. acidophilus CCNH655 against different opportunistic pathogens

, figureFileSmall=null, figureFileBig=null, tableContent=
条件致病菌大肠杆菌金黄色葡萄球菌沙门氏菌白色念珠菌
ATCC25922CICC10421CMCC26001CMCC26003ATCC14028CVCC3378CICC1965ATCC10231
抑菌率(%)92.42±2.7786.33±0.9589.97±2.1170.50±1.3358.91±2.2364.35±2.189.41±0.527.35±0.11
), ArticleFig(id=1320883853636518353, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320883842693579159, language=CN, label=表5, caption=

嗜酸乳杆菌CCNH655对不同条件致病菌的抑菌结果

, figureFileSmall=null, figureFileBig=null, tableContent=
条件致病菌大肠杆菌金黄色葡萄球菌沙门氏菌白色念珠菌
ATCC25922CICC10421CMCC26001CMCC26003ATCC14028CVCC3378CICC1965ATCC10231
抑菌率(%)92.42±2.7786.33±0.9589.97±2.1170.50±1.3358.91±2.2364.35±2.189.41±0.527.35±0.11
), ArticleFig(id=1320883853707821522, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320883842693579159, language=EN, label=Table 6, caption=

Antibiotic susceptibility results of L. acidophilus CCNH655

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序号抗生素种类抗生素母液
浓度(μg/mL)
最小抑菌浓度
(MIC,μg/mL)
判断浓度
(μg/mL)
1万古霉素1280.52
2庆大霉素2561616
3链霉素256216
4克林霉素1644
5四环素6444
6红霉素80.51
7氯霉素6444
8氨苄青霉素1611
9卡那霉素10246464
), ArticleFig(id=1320883853783318995, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320883842693579159, language=CN, label=表6, caption=

嗜酸乳杆菌CCNH655抗生素敏感测定结果

, figureFileSmall=null, figureFileBig=null, tableContent=
序号抗生素种类抗生素母液
浓度(μg/mL)
最小抑菌浓度
(MIC,μg/mL)
判断浓度
(μg/mL)
1万古霉素1280.52
2庆大霉素2561616
3链霉素256216
4克林霉素1644
5四环素6444
6红霉素80.51
7氯霉素6444
8氨苄青霉素1611
9卡那霉素10246464
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一株新型嗜酸乳杆菌CCNH655的筛选及其在糖脂代谢调控中的益生功能研究
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杨鑫 , 杨娟 , 黄佳豪 , 陈欣怡 , 郑晓卫 *
食品工业科技 | 生物工程 2026,47(13): 185-192
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食品工业科技 |生物工程 2026 , 47 (13) : 185 -192
一株新型嗜酸乳杆菌CCNH655的筛选及其在糖脂代谢调控中的益生功能研究
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杨鑫 , 杨娟, 黄佳豪, 陈欣怡, 郑晓卫*
作者信息
  • 中粮营养健康研究院有限公司,北京 102200
通讯作者:
郑晓卫(1981−),女,博士,正高级工程师,研究方向:微生物应用研究,E-mail:。
作者简介:

杨鑫(1991−),女,硕士研究生,研究方向:功能微生物筛选,E-mail:

Screening and Probiotic Characterization of Lactobacillus acidophilus CCNH655 and Its Potential Role in Regulating Glucose and Lipid Metabolism
Xin YANG , Juan YANG, Jiahao HUANG, Xinyi CHEN, Xiaowei ZHENG*
Affiliations
  • Nutrition & Health Research Institute, COFCO Corporation, Beijing 102200, China
出版时间: 2026-07-01 doi: 10.13386/j.issn1002-0306.2025060343
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目的:本研究旨在从新疆发酵酸驼乳中分离筛选具有优良益生特性与代谢调节功能(降血糖、降血脂)的益生菌菌株。方法:首先,采用传统微生物分离技术从新疆发酵酸驼乳中分离纯化乳酸菌;通过模拟人工胃液、胆盐耐受性、自聚集能力及疏水性检测,系统评估菌株的潜在益生特性;进一步以α-葡萄糖苷酶抑制率、α-淀粉酶抑制率为核心指标评价菌株的体外降血糖潜力,以甘氨酸/牛磺酸胆汁盐水解酶活性及胆固醇降解率为关键参数评估菌株的体外降血脂功效;最后,通过抑菌谱测定、溶血性试验及抗生素敏感测试,综合评价候选菌株的抑菌能力与生物安全性。结果:从新疆发酵酸驼乳中成功分离获得多株乳酸菌,经初筛获得10株具有较强人工胃液(pH3.0)与胆盐(0.2%)耐受性的候选菌株,其中6株表现出优异的体外黏附能力;经复筛最终获得1株嗜酸乳杆菌(编号CCNH655),该菌株同时具备较优的降血糖(α-葡萄糖苷酶抑制率67.19%±5.38%、α-淀粉酶抑制率86.75%±4.34%)与降血脂(甘氨酸胆汁盐水解酶活性3.89±0.35 U/mL、胆汁盐水解酶活性6.91±0.48 U/mL、胆固醇降解率79.39%±4.76%)功能,且具有较广泛的抑菌谱,无溶血现象,并对9种抗生素呈敏感型,符合益生菌安全性评价标准。结论:嗜酸乳杆菌CCNH655兼具优良的益生特性、显著的代谢调节功能及良好的生物安全性,为开发靶向改善糖脂代谢的新型功能性益生菌产品及发酵乳制品提供了重要的菌株资源与科学支撑。

嗜酸乳杆菌  /  益生特性  /  降血糖  /  降胆固醇  /  安全性

Objective: This study aimed to isolate and screen probiotic strains with excellent probiotic properties and metabolic regulatory functions (hypoglycemic and hypocholesterolemic activities) from fermented camel milk in Xinjiang. Methods: Firstly, lactic acid bacteria were isolated and purified from Xinjiang fermented camel milk using traditional microbial isolation techniques. Their potential probiotic properties were systematically evaluated via assays of simulated artificial gastric juice tolerance, bile salt tolerance, auto-aggregation ability, and hydrophobicity. Furthermore, the in vitro hypoglycemic potential was assessed using α-glucosidase inhibition rate and α-amylase inhibition rate as core indicators, while the in vitro hypocholesterolemic efficacy was evaluated based on key parameters including glycine/taurine bile salt hydrolase activity and cholesterol degradation rate. Finally, the antibacterial ability and biological safety of the candidate strain was comprehensively evaluated through antibacterial spectrum determination, hemolysis test, and antibiotic sensitivity test. Results: A total of multiple lactic acid bacteria strains were successfully isolated from the fermented camel milk. After primary screening, 10 candidate strains with strong tolerance to simulated artificial gastric juice (pH3.0) and bile salts (0.2%) were obtained, among which 6 strains exhibited excellent in vitro adhesion ability. Through secondary screening, one Lactobacillus acidophilus strain (designated CCNH655) was ultimately selected. This strain simultaneously displayed superior hypoglycemic activity (as indicated by α-glucosidase inhibition rate 67.19%±5.38% and α-amylase inhibition rate 86.75%±4.34%) and hypocholesterolemic efficacy (reflected by glycine bile salt hydrolase activity 3.89±0.35 U/mL, taurine bile salt hydrolase activity 6.91±0.48 U/mL, and cholesterol degradation rate 79.39%±4.76%) functions. Additionally, it showed a relatively broad antibacterial spectrum, no hemolytic activity, and sensitivity to 9 antibiotics, thus meeting the safety evaluation standards for probiotics. Conclusion: L. acidophilus CCNH655 possesses excellent probiotic properties, significant metabolic regulatory functions, and favorable biological safety. It provides an important strain resource and scientific support for the development of novel functional probiotic products and fermented dairy products targeting the improvement of glucose and lipid metabolism.

Lactobacillus acidophilus  /  probiotic properties  /  hypoglycemic  /  hypocholesterolemic  /  safety
杨鑫, 杨娟, 黄佳豪, 陈欣怡, 郑晓卫. 一株新型嗜酸乳杆菌CCNH655的筛选及其在糖脂代谢调控中的益生功能研究. 食品工业科技, 2026 , 47 (13) : 185 -192 . DOI: 10.13386/j.issn1002-0306.2025060343
Xin YANG, Juan YANG, Jiahao HUANG, Xinyi CHEN, Xiaowei ZHENG. Screening and Probiotic Characterization of Lactobacillus acidophilus CCNH655 and Its Potential Role in Regulating Glucose and Lipid Metabolism[J]. Science and Technology of Food Industry, 2026 , 47 (13) : 185 -192 . DOI: 10.13386/j.issn1002-0306.2025060343
随着现代生活方式的转变,高热量饮食、久坐少动、缺乏运动等不良习惯日益普遍,导致代谢综合征(Metabolic Syndrome,MetS)的发病率显著上升,已成为威胁公共健康的重要问题。代谢综合征是一种复杂的糖脂代谢紊乱状态,其典型特征包括向心性肥胖、全身性高血压、胰岛素抵抗以及动脉粥样硬化性血脂异常[1−2]。这一系列代谢异常不仅影响个体的生活质量,更增加了心血管疾病、2型糖尿病等慢性病的发生风险,对公共卫生体系构成严峻挑战。因此,探索有效的预防和干预策略,尤其是基于天然食物或其成分的方案,对于应对代谢综合征的流行具有重要意义。
在众多天然食物及其成分中,富含益生菌的发酵乳制品,如开菲尔酸奶,正显示出其在改善代谢健康方面的潜力。研究表明,开菲尔酸奶具有显著的降血脂、降血糖功能,能够有效降低高脂饮食小鼠血清中的甘油三酯和总胆固醇含量,并显著抑制四氧嘧啶诱导的血糖升高[3]。益生菌可通过促进葡萄糖代谢、转化胆固醇、抑制糖脂吸收等多种机制,有效改善糖脂代谢紊乱[4]。益生菌已被建议作为一种预防2型糖尿病的潜在策略,例如通过抑制α-葡萄糖苷酶和α-淀粉酶活性,延缓碳水化合物消化吸收,稳定血糖水平,对糖尿病、高血脂及肥胖症均有积极作用[5−6]。大量研究证据支持益生菌的这些益处,例如,鼠李糖乳杆菌GG(LGG)能改善糖尿病大鼠的糖化血红蛋白水平和胰岛素反应[7];副干酪乳杆菌TD062和L14分别展现出良好的降血糖及改善脂质代谢、氧化应激的能力[8−9]。此外,益生菌改善胆固醇水平的机制多样,包括直接吸收、产生抑制吸收的代谢产物、胆汁盐水解酶活性以及调节肠道菌群平衡等[10−13]。这些发现为利用益生菌及其发酵产品作为干预代谢综合征的有效手段提供了坚实的科学依据。
本研究从新疆发酵驼乳中分离纯乳酸菌,依据其耐人工胃液、胆盐及体外黏附特性进行筛选,在此基础上,进一步评估候选菌株的降血糖、降血脂能力,最终获得一株嗜酸乳杆菌CCNH655。对该菌株的抑菌性能及安全性进行测定,以期筛选出一株具有改善高血糖、高血脂等代谢性疾病潜力的功能性益生菌,为开发相关预防和治疗产品奠定基础。
菌株来源 本实验室从新疆发酵酸驼乳分离菌株;质控菌株:大肠杆菌(ATCC25922、CICC10421)、金黄色葡萄球菌(CMCC26001、CMCC26003)、沙门氏菌(ATCC14028、CVCC3378)、白色念珠菌(CICC1965、ATCC10231) ATCC编号菌株采购自美国典型培养物保藏中心,CICC编号菌株采购自中国工业微生物保藏管理中心,CMCC编号菌株采购自中国医学细菌保藏管理中心,CVCC编号菌株采购自国家兽医微生物(毒)种保藏中心;MRS培养基、LB培养基、胆盐 Oxoid;无菌脱纤维绵羊血、哥伦比亚血琼脂平板、万古霉素、硫酸庆大霉素、硫酸链霉素、盐酸克林霉素、盐酸四环素、红霉素、氨苄青霉素、卡那霉素、氯霉素、PBS缓冲液(0.1 mol/L,pH6.8) 均为分析纯,北京索莱宝科技有限公司;十二烷、硝基苯基-β-D-葡萄糖苷、α-葡萄糖苷酶(50 U/mg)、碳酸钠、α-淀粉酶(4000 U/g)、可溶性淀粉、碘液、甘氨胆酸钠、牛磺胆酸钠、胆固醇、蔗糖酯、吐温80、无水乙醇 均为分析纯,国药集团化学试剂有限公司;氨基酸检测试剂盒(ml095002)、胆固醇检测试剂盒(TC-W48-N(1031) 上海酶联生物科技有限公司。
Multifuge X4R Pro台式离心机、IMH100-SS恒温培养箱 赛默飞世尔科技(中国)有限公司;移液器 德国Eppendorf公司;Costar 96孔细胞培养板(3599) 康宁股份有限公司;ZQZY-CF9.9恒温振荡摇床 上海知楚仪器有限公司;生物安全柜 ESCO;SQ810C立式压力蒸汽灭菌锅 重庆雅马拓科技有限公司;QPIX 450单克隆挑取机器人 美谷分子仪器(上海)有限公司;DG250厌氧工作站 唐惠特利科学有限公司;ME104型万分之一天平 梅特勒-托利多仪器(上海)有限公司。
将采集的新鲜新疆发酵酸驼乳用无菌生理盐水逐级稀释,分别吸取100 μL不同稀释梯度的稀释液涂布于MRS固体平板上,置于37 ℃厌氧培养箱中培养48 h,用QPIX 450挑取单菌落接种于MRS液体培养基中,培养过夜,并添加甘油(终浓度25%),−80 ℃冻存。
将−80 ℃冷冻保存的益生菌菌株按照0.2%的接种比例接种于新鲜MRS液体培养基,37 ℃培养过夜,传代2~3次,4 ℃保存,待用。
人工模拟胃液[14−15]:参照《益生菌剂胃液耐受性检测方法》T/CHHFA435-2024标准制备人工模拟胃液,现配现用。胆盐:称取0.2 g胆盐,定容至100 mL,121 ℃高压灭菌15 min。
人工胃液耐受性[14]:将培养过夜的菌液用生理盐水洗涤两次后,进行梯度稀释,测定初始活菌数总数(N),每组设3个平行样;将洗涤后重悬的菌液与等体积的人工模拟胃液混合,于37 ℃水浴3 h后,梯度稀释并测定处理后活菌数(N′)。采用平板计数法测定活菌数,耐胃酸存活率计算如式(1)所示:
$ \rm 耐胃酸存活率({\text{%}})= \left(\frac{{N}'_{1}\times 2}{{{N}}_{1}}+\frac{{N}'_{2}\times 2}{{{N}}_{2}}+\frac{{N}'_{3}\times 2}{{{N}}_{3}}\right)\times\frac{1}{3}\times 100 $
式中:N1、N2、N3为三次胃液耐受性检测初始活菌数总数,CFU/mL;N′1、N′2、N′3为三次胃液耐受性检测处理后活菌数总数,CFU/mL。
胆盐耐受性[16−17]:将培养过夜的菌液用生理盐水洗涤两次后,进行梯度稀释,测定初始活菌数总数(N),每组设3个平行样;将洗涤后重悬的菌液,与等体积的胆盐溶液混合,于37 ℃水浴3 h后,梯度稀释并测定处理后活菌数(N′)。采用平板计数法测定活菌数,耐胆盐存活率计算如式(2)所示:
$ \rm 耐胆盐存活率({\text{%}})=\left(\frac{{{N}}'_{1}\times 2}{{{N}}_{1}}+\frac{{{N}}'_{2}\times 2}{{{N}}_{2}}+\frac{{{N}}'_{3}\times 2}{{{N}}_{3}}\right)\times\frac{1}{3}\times 100 $
式中:N1、N2、N3为三次胆盐耐受性检测初始活菌数总数,CFU/mL;N′1、N′2、N′3为三次胆盐耐受性检测处理后活菌数总数,CFU/mL。
培养过夜的菌液用生理盐水洗涤2次后,重悬使其OD600=1,吸取100 μL菌液至酶标板中,检测初始OD600值,记为A0;而后将菌液静置4 h,取上层菌液100 μL至酶标板,检测其静置后OD600值,记为A1[18],计算如式(3)所示:
$ \rm 菌株自聚集率({\text{%}})= \frac{{\mathrm{A}}_{0}-{\mathrm{A}}_{1}}{{\mathrm{A}}_{0}} \times 100 $
式中:A1:样品处理后OD600值;A0:样品初始OD600值。
吸取上述OD600=1的重悬菌液100 μL至酶标板中,检测初始OD600值,记为A0;而后吸取菌液900 μL,加入180 μL十二烷旋涡振荡,静置20 min,取下层水相测其OD600值,记为A1[19−20],计算如式(4)所示:
$ 疏水率({\text{%}})= \frac{{\mathrm{A}}_{0}-{\mathrm{A}}_{1}}{{\mathrm{A}}_{0}} \times 100 $
式中:A1:样品处理后OD600值;A0:样品初始OD600值。
参照李璇[21]、张军蒙[22]的方法并加以调整。96孔酶标板中加入25 μL 0.1 mol/L PBS缓冲液(pH6.8),25 μL 20 mmol/L硝基苯基-β-D-葡萄糖苷和25 μL样品,37 ℃反应10 min后,加入50 μL 0.2 U/mL的α-葡萄糖苷酶;37 ℃反应15 min后,加入100 μL 0.1 mol/L碳酸钠溶液终止反应,于405 nm处检测OD值,以阿卡波糖(1 μg/μL)作为阳性对照组。α-葡萄糖苷酶活性抑制率计算如式(5)所示:
$ \alpha{\text-}葡萄糖苷酶活性抑制率({\text{%}})=\left(1- \frac{{\mathrm{A}}_{\text{样品}}-{\mathrm{A}}_{\text{样品对照}}}{{\mathrm{A}}_{\text{空白}}-{\mathrm{A}}_{\text{空白对照}}}\right)\times 100 $
式中:A样品:样品检测OD405值;A样品对照:样品组PBS替代酶添加检测OD405值;A空白:PBS检测OD405值;A空白对照:空白组PBS替代酶添加检测OD405值。
参照刘文瑞[6]、漆莹等[23]的方法并加以调整。96孔酶标板中加入25 μL 0.1 mol/L PBS缓冲液(pH6.8),50 μL 2 U/mL α-淀粉酶,50 μL 1%可溶性淀粉溶液和25 μL样品,37 ℃反应30 min后,加入1 μL碘液,于660 nm处检测OD值,以阿卡波糖(1 μg/μL)作为阳性对照组。样品的α-淀粉酶活性抑制率计算如公式(6)所示:
$ \alpha{\text-}淀粉酶活性抑制率({\text{%}})=\left(1- \frac{{\mathrm{A}}_{\text{样品}}-{\mathrm{A}}_{\text{样品对照}}}{{\mathrm{A}}_{\text{空白}}-{\mathrm{A}}_{\text{空白对照}}}\right)\times 100 $
式中:A样品:样品检测OD660值;A样品对照:样品组PBS替代酶添加检测OD660值;A空白:PBS检测OD660值;A空白对照:空白组PBS替代酶添加检测OD660值。
参照Shehata等[24]、玛丽娜·库尔曼[25]的方法并加以调整。培养过夜的菌液,5000 r/min,4 ℃离心5 min,收集菌泥,用生理盐水洗涤两次,一定体积的0.1 mol/L PBS(pH6.8)重悬,平均分成两份,一份加入10%(v/v)200 mmol/L甘氨胆酸钠溶液,一份加入10%(v/v)200 mmol/L牛磺胆酸钠溶液,37 ℃反应2 h,离心收集上清,用氨基酸检测试剂盒检测氨基酸含量,分别计算甘氨酸胆汁盐水解酶活性和牛磺酸胆汁盐水解酶活性。胆汁盐水解酶活性(U)定义:1 min从底物释放1 μmol氨基酸的酶的量。
参照吴燕[17]、腾跃[26]的方法,配制胆固醇溶液及含胆固醇的MRS液体培养基,将培养过夜的菌液,按照2%接种量接种至上述含胆固醇的MRS液体培养基中,37 ℃、180 r/min培养24 h,空白培养基作为空白对照。用胆固醇检测试剂盒检测胆固醇含量,胆固醇降解率计算如式(7)所示:
$ 胆固醇降解率({\text{%}})= \frac{{\mathrm{A}}_{\text{空白}}-{\mathrm{A}}_{\text{样品}}}{{\mathrm{A}}_{\text{空白}}} \times 100 $
式中:A样品:样品检测胆固醇含量;A空白:空白培养基检测胆固醇含量。
将纯化后的单菌落,应用细菌基因组提取试剂盒提取菌株DNA,选择细菌16S rDNA通用引物27F与1492R,对其V1-V9可变区进行PCR扩增;PCR扩增体系为2×Rapid Taq Master Mix 5 μL,27F与1492R引物各1 μL,DNA模板1 μL,ddH2O 2 μL。PCR扩增条件为95 ℃预变性3 min,95 ℃变性30 s,55 ℃退火30 s,72 ℃延伸1 min 30 s,共34个循环;72 ℃再延伸5 min。扩增产物经纯化后,委托北京睿博兴科生物技术有限公司进行Sanger测序,最终获得16S rDNA序列。
将测序获得的16S rDNA序列通过BLAST程序在NCBI数据库中进行同源性比对,并下载同源性较高的参考序列。使用MEGA 7.0.26软件进行系统发育分析:首先采用Clustal W法进行多序列比对,再基于邻接法(Neighbor-Joining,NJ)构建系统发育树。进化距离模型选用最大复合似然法(Maximum Composite Likelihood),并以自展法(bootstrap method)进行可靠性检验,重复次数设为1000次。
将指示菌株大肠杆菌、金黄色葡萄球菌、沙门氏菌分别接种于LB液体培养基中,37 ℃培养过夜;白色念珠菌接种于YPD液体培养基中,30 ℃培养过夜;分别转接至对应新鲜培养基中,培养至OD600=1或活菌数108 CFU/mL,对应培养基稀释至105 CFU/mL作为指示菌液[27−28]。
将嗜酸乳杆菌CCNH655培养过夜的菌液,12000 r/min离心2 min收集上清,0.22 μm滤膜过滤除菌,作为测试样品。其中MRS液体培养基作为阴性对照,氨苄青霉素或卡那霉素作为阳性对照。测试样品与指示菌液等体积混合,测定培养前后的OD600值,抑菌率计算如公式(8)所示。
$ 抑菌率({\text{%}})= \frac{\mathrm{A}_0-\mathrm{A}}{\mathrm{A}_0}\times 100 $
式中:A0:阴性对照样品OD600值;A:样品OD600值。
吸取10 μL过夜培养的嗜酸乳杆菌CCNH655接种于哥伦比亚血琼脂平板,其中大肠杆菌作为阴性对照、金黄色葡萄球菌作为阳性对照菌株(每株菌做3个重复),37 ℃培养48 h,观察溶血情况[18]。
依据T/CIFST009-2022《食品用益生菌通则》对氨苄青霉素、万古霉素、庆大霉素、卡那霉素、链霉素、红霉素、克林霉素、四环素、氯霉素9种抗生素的最小抑菌浓度进行检测。抗生素母液的配制浓度:氨苄青霉素:16 μg/mL;万古霉素:128 μg/mL;庆大霉素:256 μg/mL;卡那霉素:1024 μg/mL;链霉素:256 μg/mL;红霉素:8 μg/mL;克林霉素:16 μg/mL;四环素:64 μg/mL;氯霉素:64 μg/mL,以MRS作为稀释液,采用二倍稀释法,配制不同浓度的抗生素样品[29−30]。
以2%的接种量将过夜培养的嗜酸乳杆菌CCNH655接种于新鲜MRS液体培养基中,37 ℃、200 r/min培养4 h至OD600=1,活菌数约为1.5×108 CFU/mL;稀释1000倍,与不同浓度的抗生素溶液等体积混合置于96孔细胞培养板中,37 ℃培养24 h,检测培养前后OD600。其中MRS液体培养基作为空白对照。菌株完全被抑制的浓度为最小抑菌浓度(MIC),将MIC值与《食品用益生菌通则》(T/CIFST 009-2022)中折点值进行比对,判断该菌株的抗生素敏感性。
实验数据均基于3次独立重复的平均值,以“平均值±标准差”(Mean±SD)表示。采用GraphPad Prism软件进行数据处理与统计分析,系统发育树利用MEGA 7.0.26软件构建。
分离菌株分别经人工胃液(pH3.0)处理3 h,0.2%胆盐处理3 h,耐受存活率前20菌株结果见表1。根据耐胃酸和耐胆盐存活率的组间显著性分析(Kruskal-Wallis H检验),综合评估各菌株的性能水平,20株候选菌株的耐胃酸、耐胆盐存活率存在显著差异(P<0.05),通过Dunn’s多重比较分析(FDR校正),菌株被划分为不同显著性组(a、ab、b、abc、bc、c、cd、d、e、f、g)。本研究采用“存活率+显著性分组”双重标准进行筛选,优选耐胃酸存活率>68%,耐胆盐存活率>50%或属于c及以上组别的菌株,最终,从20株菌株中筛选出10株耐胃酸、耐胆盐性能较强的菌株,用于后续功能评价,编号分别为MRS1、MRS2、MRS4、MRS9、MRS10、MRS12、MRS14、MRS15、MRS17、MRS19。乳酸菌在肠道中定植的首要条件即耐胃酸、耐胆盐,人体胃酸环境(pH3.0)和小肠高胆盐环境(胆盐0.1%~0.3%(w/v))会对部分乳酸菌的活性及代谢能力产生抑制,乳酸菌以较高活性及活菌数到达小肠中则有利于其定植[31]。王睿敏等[32]以41株乳酸菌作为研究对象,筛选具有潜在降压功能的菌株,其中4株乳酸菌在pH2.0~3.0的模拟胃酸环境中,存活率均大于65%,胆盐浓度在0~0.1%范围内,具有较好的耐受性。相较于已报道菌株,本研究获得的10株候选菌株在模拟胃肠条件下(pH3.0人工胃液处理3 h,0.2%胆盐处理3 h)均展现出更高的存活率,表明其具有更优良的耐酸性和耐胆盐性能,具备良好的应用潜力。
在益生菌筛选研究中,自聚集性和表面疏水性常被作为评估乳酸菌黏附性能的关键指标,广泛应用于体外功能评价体系[33]。菌株在快速繁殖期会出现自聚集性,且与菌株的黏附能力呈正相关;细菌高疏水性能够有助于细菌与肠黏膜相黏附,因此细菌疏水性越高,其黏附能力也越强[34]。为评估菌株的体外黏附潜力,本研究测定了其自聚集性及表面疏水性,结果见表2。
根据自聚集性和疏水性的多组比较分析(Kruskal-Wallis H检验),综合评估各菌株的功能特性水平,10株候选菌株的自聚集性、疏水性存在显著差异(P<0.05),通过Dunn’s多重比较分析(FDR校正),菌株被划分为不同显著性组(a、b、c、d)。本研究采用“体外黏附能力+显著性分组”双重标准进行筛选,优选自聚集性、疏水性均>30%或属于b及以上组别的菌株,最终,从10株菌株中筛选出4株菌株用于后续功能评价,编号分别为MRS2、MRS4、MRS14、MRS19。4株候选菌株相较于其他候选菌株表现出更优的体外黏附能力,表明其具备较强的肠道定植能力,具有成为潜在益生菌的应用前景。
本研究通过PNPG法测定4株候选菌株的α-葡萄糖苷酶抑制率,同时测定其α-淀粉酶抑制率,综合评价候选菌株的降血糖能力,结果见表3。不同菌株α-葡萄糖苷酶抑制率、α-淀粉酶抑制率之间差异采用Kruskal-Wallis H检验,随后进行Dunn’s多重比较(FDR校正),4株候选菌株均具有较强的α-葡萄糖苷酶抑制率,其中MRS2、MRS14、MRS19具有较强的α-淀粉酶抑制率。MRS2的α-葡萄糖苷酶抑制率最低,仅有65.28%±4.57%,MRS4的α-淀粉酶抑制率最低,仅有75.34%±6.78%。MRS14的降血糖能力最强,α-葡萄糖苷酶抑制率达67.19%±5.38%,α-淀粉酶抑制率达86.75%±4.34%。
大量研究表明,益生菌的降血糖、抗氧化能力对治疗人类2型糖尿病有有益作用。李曼等[35]从母乳中筛选具有降血糖能力的益生菌,评价纯化菌株对α-葡萄糖苷酶、α-淀粉酶具有抑制作用的菌株,其中植物乳杆菌R15具有最优降血糖能力,α-葡萄糖苷酶抑制率达12.73%,α-淀粉酶抑制率达88%。Huligere等[36]从发酵面团中分离出24株益生菌,其中7株菌株进行抑制碳水化合物水解酶α-葡萄糖苷酶、α-淀粉酶的能力评价,α-葡萄糖苷酶抑制率范围为15.08%~59.55%,而α-淀粉酶抑制率范围为18.79%~63.42%,这些菌株可能具有抗糖尿病特性。综合本研究结果与已有报道可知,MRS2、MRS14、MRS19对α-葡萄糖苷酶和α-淀粉酶的抑制率相较其他候选菌株性能更优,且其α-葡萄糖苷酶抑制率优于Huligere等[36]分离菌株的最高抑制率(59.55%),α-淀粉酶抑制率亦接近李曼等[35]筛选的植物乳杆菌R15的最优水平(88%),进一步证实MRS2、MRS14、MRS19具备降血糖功能的潜力,有望成为辅助改善2型糖尿病的潜在益生菌菌株。
筛选降解胆固醇益生菌菌株的相关研究显示,其降胆固醇机制主要为菌体吸收结合胆固醇或代谢产物,以及分泌胆汁盐水解酶、胞外多糖等代谢产物降解胆固醇。研究者从发酵蔬菜、老坛子泡菜等样品中筛选出多株高效降胆固醇益生菌株,展现出良好的开发应用潜力[37−39]。筛选降胆固醇菌株,以“双高酶活性(甘氨酸、牛磺酸胆汁盐水解酶)+高胆固醇降解率”为核心,优先选取三个指标均优的菌株。如表4所示,对4株菌株的甘氨酸、牛磺酸胆汁盐水解酶活性及胆固醇降解率的差异进行Kruskal-Wallis H检验,随后采用Dunn’s多重比较法(经FDR校正)进行两两比较。结果显示,MRS14在各项指标上的酶活性及胆固醇降解率均高于其他3株菌株,表现出明显优势。其甘氨酸胆汁盐水解酶活性达3.89±0.35 U/mL,牛磺酸胆汁盐水解酶活性达6.91±0.48 U/mL,胆固醇的降解率达79.39%±4.76%。本研究结合实验结果与文献分析表明,MRS14在胆汁盐水解酶活性及胆固醇降解能力方面表现优异,其胆固醇降解率优于已有报道中的高效菌株(62.54%)[38],提示其通过双功能机制参与胆固醇代谢,具有作为降血脂益生菌的应用前景。
MRS14菌株在肠道耐受性、体外黏附能力及代谢调控功能(降血糖、降血脂)方面均具有一定的优势,具备作为预防代谢性疾病方面具有潜在的应用价值。对MRS14进行16S rDNA序列测序,数据在NCBI数据库进行同源序列BLAST比对,用MEGA 7.0.26软件绘制菌株MRS14基因序列相关菌株的系统发育树,结果见图1。菌株MRS14与Lactobacillus acidophilus strain GR101、L. acidophilus strain VPI6032、L. acidophilus strain LA1聚在一个分支上,确认该菌株为嗜酸乳杆菌(L. acidophilus),并命名为CCNH655。
检测嗜酸乳杆菌CCNH655对常见条件致病菌,革兰氏阳性细菌:金黄色葡萄球菌,革兰氏阴性细菌:大肠杆菌、沙门氏菌的抑制能力,真菌:白色念珠菌的抑制能力,结果见表5。从表5中可以看出,嗜酸乳杆菌CCNH655具有广泛的抑菌谱,对革兰氏阴性细菌大肠杆菌的抑菌能力优于革兰氏阳性细菌金黄色葡萄球菌,并对沙门氏菌、白色念珠菌具有一定的抑制能力。
嗜酸乳杆菌CCNH655未出现透明圈,与阴性对照菌大肠杆菌效果相似,与阳性对照菌金黄色葡萄球菌有显著差异。图2结果表明,嗜酸乳杆菌CCNH655没有引起溶血现象且呈阴性。
由表6可知,嗜酸乳杆菌CCNH655对万古霉素、庆大霉素、链霉素、克林霉素、四环素、红霉素、氯霉素、氨苄青霉素、卡那霉素9种抗生素敏感。根据《食品用益生菌通则》中益生菌菌株对抗生素耐药性安全评价标准,结果表明嗜酸乳杆菌CCNH655是安全的,可作为益生菌应用于食品行业。
将新疆发酵酸驼乳中分离的菌株开展耐人工胃液、耐胆盐性能评价,将耐受性前20的菌株中,同时耐受人工胃液、耐胆盐的10株菌株开展体外黏附能力测定,其中4株候选菌株具有较强的自聚集性和疏水性。进一步开展降血糖、降血脂能力测定,MRS14菌株的总体性能最优,其α-葡萄糖苷酶抑制率达67.19%±5.38%,α-淀粉酶抑制率达86.75%±4.34%;甘氨酸胆汁盐水解酶活性达3.89±0.35 U/mL,牛磺酸胆汁盐水解酶活性达6.91±0.48 U/mL,胆固醇的降解率达79.39%±4.76%。经16S rDNA基因测序鉴定,该菌株为嗜酸乳杆菌,并编号为CCNH655。嗜酸乳杆菌CCNH655具有广泛的抑菌谱,该菌株对革兰氏阴性菌和革兰氏阳性菌均具有较强的一致作用,且对白色念珠菌表现出一定的抑制活性。经溶血试验和抗生素敏感性检测,该菌株未产生溶血圈,且对万古霉素、庆大霉素、链霉素、克林霉素、四环素、红霉素、氯霉素、氨苄青霉素和卡那霉素9种抗生素均表现为敏感,未见耐药性。综合表明该菌株具有良好的安全性,具备作为食品级菌株用于食品开发与应用的潜力。综合体外降血糖与降血脂功能评价结果,嗜酸乳杆菌CCNH655表现出良好的糖脂代谢调节活性,是一株具备显著开发潜力的功能性益生菌菌株。其在干预2型糖尿病、高脂血症等代谢性疾病方面展现出应用前景,可作为功能性益生菌产品及乳制品开发的候选菌株,在代谢性疾病防控领域具有深入研究价值与广阔的应用转化空间。

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2026年第47卷第13期
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doi: 10.13386/j.issn1002-0306.2025060343
  • 接收时间:2025-06-26
  • 首发时间:2026-10-24
  • 出版时间:2026-07-01
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    中粮营养健康研究院有限公司,北京 102200

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郑晓卫(1981−),女,博士,正高级工程师,研究方向:微生物应用研究,E-mail:。
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2种不同金属材料的力学参数
科
Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)
属
Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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