JGG:肠道分离的卡拉胶降解菌可以加重无菌小鼠肠道炎症

2021-08-20 网络 网络

卡拉胶CGN是从海洋红藻类海草中提炼出来的亲水性胶体,作为一种常见的增稠类食品添加剂,被广泛应用于食品药品中。但其安全性仍存在争议,已有研究指出,CGN存在一定的致炎、致癌风险。

卡拉胶CGN是从海洋红藻类海草中提炼出来的亲水性胶体,作为一种常见的增稠类食品添加剂,被广泛应用于食品药品中。但其安全性仍存在争议,已有研究指出,CGN存在一定的致炎、致癌风险。本实验为了研究CGN及其降解细菌在结肠中的作用,筛选了人类粪便中可以降解CGN的细菌,并检测其在无菌小鼠中的促炎作用。

薄层层析法显示高分子量CGN(≥100KD)不能被人类粪便微生物降解,而低分子量CGNs,即κ-卡拉胶低聚糖(KCO,~4.5 kDa)在7/8人类粪便样本中可以发生降解(研究共纳入8个粪便样本)。同时,从粪便中提取的Bacteroides xylanisolvens 和 Escherichia coli,两者可协同降解KCO,B. xylanisolvens是主要的降解剂。实验采用KCO或B. xylanisolvens单独给予无菌小鼠作为对照,而两者联合使用会明显加重小鼠结直肠炎症反应,p-p38-, CD3-, CD79a-阳性免疫细胞的数量也明显增多。

因此,KCO降解菌及KCO产物能够促进小鼠炎症反应,可以作为评估食品药品中CGN安全性的两个关键标志物。

原文出处: Yin, Y., Carrageenan oligosaccharides and associated carrageenan-degrading bacteria induce intestinal inflammation in germ-free mice, Journal of Genetics and Genomics, doi: 10.1016/j.jgg.2021.08.001.

 

版权声明:
本网站所有内容来源注明为“梅斯医学”或“MedSci原创”的文字、图片和音视频资料,版权均属于梅斯医学所有。非经授权,任何媒体、网站或个人不得转载,授权转载时须注明来源为“梅斯医学”。其它来源的文章系转载文章,或“梅斯号”自媒体发布的文章,仅系出于传递更多信息之目的,本站仅负责审核内容合规,其内容不代表本站立场,本站不负责内容的准确性和版权。如果存在侵权、或不希望被转载的媒体或个人可与我们联系,我们将立即进行删除处理。
在此留言
评论区 (4)
#插入话题
  1. [GetPortalCommentsPageByObjectIdResponse(id=1414782, encodeId=448b1414e826f, content=<a href='/topic/show?id=af1a8169e60' target=_blank style='color:#2F92EE;'>#肠道炎症#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=47, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=81697, encryptionId=af1a8169e60, topicName=肠道炎症)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=3f1f3086480, createdName=lancelotzzl, createdTime=Sat Aug 21 22:52:19 CST 2021, time=2021-08-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2061104, encodeId=00d32061104b3, content=<a href='/topic/show?id=36ca5914167' target=_blank style='color:#2F92EE;'>#无菌小鼠#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=44, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=59141, encryptionId=36ca5914167, topicName=无菌小鼠)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a12645, createdName=智慧医人, createdTime=Thu Jul 14 05:52:19 CST 2022, time=2022-07-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1009642, encodeId=5b3410096425f, content=学习一下, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20201118/df82e0cde01a4cf691cd117ea1d92f92/e8f5384bf5a046e39e049573730dd6ec.jpg, createdBy=4b6d3851900, createdName=pqssy, createdTime=Fri Aug 20 09:09:01 CST 2021, time=2021-08-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1009616, encodeId=e65f100961671, content=了解一下, beContent=null, objectType=article, channel=null, level=null, likeNumber=71, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=b7a31928393, createdName=学医无涯, createdTime=Fri Aug 20 07:54:09 CST 2021, time=2021-08-20, status=1, ipAttribution=)]
  2. [GetPortalCommentsPageByObjectIdResponse(id=1414782, encodeId=448b1414e826f, content=<a href='/topic/show?id=af1a8169e60' target=_blank style='color:#2F92EE;'>#肠道炎症#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=47, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=81697, encryptionId=af1a8169e60, topicName=肠道炎症)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=3f1f3086480, createdName=lancelotzzl, createdTime=Sat Aug 21 22:52:19 CST 2021, time=2021-08-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2061104, encodeId=00d32061104b3, content=<a href='/topic/show?id=36ca5914167' target=_blank style='color:#2F92EE;'>#无菌小鼠#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=44, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=59141, encryptionId=36ca5914167, topicName=无菌小鼠)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a12645, createdName=智慧医人, createdTime=Thu Jul 14 05:52:19 CST 2022, time=2022-07-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1009642, encodeId=5b3410096425f, content=学习一下, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20201118/df82e0cde01a4cf691cd117ea1d92f92/e8f5384bf5a046e39e049573730dd6ec.jpg, createdBy=4b6d3851900, createdName=pqssy, createdTime=Fri Aug 20 09:09:01 CST 2021, time=2021-08-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1009616, encodeId=e65f100961671, content=了解一下, beContent=null, objectType=article, channel=null, level=null, likeNumber=71, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=b7a31928393, createdName=学医无涯, createdTime=Fri Aug 20 07:54:09 CST 2021, time=2021-08-20, status=1, ipAttribution=)]
  3. [GetPortalCommentsPageByObjectIdResponse(id=1414782, encodeId=448b1414e826f, content=<a href='/topic/show?id=af1a8169e60' target=_blank style='color:#2F92EE;'>#肠道炎症#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=47, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=81697, encryptionId=af1a8169e60, topicName=肠道炎症)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=3f1f3086480, createdName=lancelotzzl, createdTime=Sat Aug 21 22:52:19 CST 2021, time=2021-08-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2061104, encodeId=00d32061104b3, content=<a href='/topic/show?id=36ca5914167' target=_blank style='color:#2F92EE;'>#无菌小鼠#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=44, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=59141, encryptionId=36ca5914167, topicName=无菌小鼠)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a12645, createdName=智慧医人, createdTime=Thu Jul 14 05:52:19 CST 2022, time=2022-07-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1009642, encodeId=5b3410096425f, content=学习一下, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20201118/df82e0cde01a4cf691cd117ea1d92f92/e8f5384bf5a046e39e049573730dd6ec.jpg, createdBy=4b6d3851900, createdName=pqssy, createdTime=Fri Aug 20 09:09:01 CST 2021, time=2021-08-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1009616, encodeId=e65f100961671, content=了解一下, beContent=null, objectType=article, channel=null, level=null, likeNumber=71, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=b7a31928393, createdName=学医无涯, createdTime=Fri Aug 20 07:54:09 CST 2021, time=2021-08-20, status=1, ipAttribution=)]
    2021-08-20 pqssy

    学习一下

    0

  4. [GetPortalCommentsPageByObjectIdResponse(id=1414782, encodeId=448b1414e826f, content=<a href='/topic/show?id=af1a8169e60' target=_blank style='color:#2F92EE;'>#肠道炎症#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=47, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=81697, encryptionId=af1a8169e60, topicName=肠道炎症)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=3f1f3086480, createdName=lancelotzzl, createdTime=Sat Aug 21 22:52:19 CST 2021, time=2021-08-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2061104, encodeId=00d32061104b3, content=<a href='/topic/show?id=36ca5914167' target=_blank style='color:#2F92EE;'>#无菌小鼠#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=44, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=59141, encryptionId=36ca5914167, topicName=无菌小鼠)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a12645, createdName=智慧医人, createdTime=Thu Jul 14 05:52:19 CST 2022, time=2022-07-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1009642, encodeId=5b3410096425f, content=学习一下, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20201118/df82e0cde01a4cf691cd117ea1d92f92/e8f5384bf5a046e39e049573730dd6ec.jpg, createdBy=4b6d3851900, createdName=pqssy, createdTime=Fri Aug 20 09:09:01 CST 2021, time=2021-08-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1009616, encodeId=e65f100961671, content=了解一下, beContent=null, objectType=article, channel=null, level=null, likeNumber=71, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=b7a31928393, createdName=学医无涯, createdTime=Fri Aug 20 07:54:09 CST 2021, time=2021-08-20, status=1, ipAttribution=)]
    2021-08-20 学医无涯

    了解一下

    0

相关资讯

Communications Biology:维也纳医科大学:科学家确定一种新肠癌治疗方法

导言:如今,随着经济社会的发展,我们的生活习惯、饮食习惯都发生了巨大的变化。这就导致肠癌成为了当下最常见的癌症类型之一,目前其在全球的发病率与致死率都高居前列,近日,来自奥地利的研究人员新发现了一个与

Clin Exp Immunol:粪便B细胞活化因子对肠道炎症的诊断价值

粪便钙蛋白作为炎症性肠道疾病(IBD)的敏感生物标志物已成功被广泛推荐。最近,我们发现了一种优秀的新型粪便生物标志物--B细胞活化因子(BAFF),与粪便钙蛋白一样有效地诊断肠道炎症。

NPJ Parkinsons Dis:帕金森氏病肠道微生物群变化与肠道炎症有关

肠道微生物区系正在成为神经退行性疾病的重要调节因子,越来越多的证据表明肠道微生物与帕金森病(PD)的症状和病理生理学有关。帕金森病通常先于胃肠道症状和伴随疾病的肠道神经系统改变。几项研究已经分析了帕金

Gastroenterology:日常饮食、肠道炎症与结肠癌风险

研究认为炎症饮食与结肠癌风险提高相关,与肿瘤间质淋巴细胞反应程度相关。该研究表明,饮食相关的炎症可能导致结直肠癌的发展

JCC: 中性HGF-MET信号转导加剧了溃疡性结肠炎的肠道炎症

溃疡性结肠炎(UC)与中性粒细胞浸润过多造成的附带组织损伤有关,但这种联系尚不完全清楚。由于c-MET受体酪氨酸激酶(MET)是嗜中性粒细胞趋化和响应其配体肝细胞生长因子(HGF)的细胞毒性所必需的,

Gut :缺乏免疫球蛋白 A ,将导致小鼠患肠道炎症!

IgA缺乏会导致肠道生态系统平衡的破坏,从而使回肠产生大量炎症。