在人体组织中通过RNAin situ杂交检测Mycobacterium tuberculosis
bioRxiv : the preprint server for biology
|October 24, 2023
概括
RNAscope直接检测组织中的Mycobacterium结核病 (Mtb) mRNA,改善了超越Ziehl-Neelsen染色的结核病诊断. 这种方法在ZN阴性样本中揭示了Mtb mRNA,提供了新的诊断和研究途径.
科学领域:
- 微生物学 微生物学
- 病理学 病理学 病理学
- 分子诊断学 分子诊断
背景情况:
- 齐尔-尼尔森 (ZN) 染色方法用于识别Mycobacterium 结核病 (Mtb) 酸速菌根 (AFB) 具有可变的疗效,阻碍了结核病 (TB) 的准确诊断.
- 直接检测mtbmRNA为克服传统AFB染色方法的局限性提供了一个潜在的替代方案.
研究的目的:
- 在人类结核病组织中利用RNAscope进行空间MtbmRNA分布分析.
- 为了评估确认结核病患者的ZN阴性组织.
- 建立RNAscope作为结核病诊断和了解Mtb生物学的平台.
主要方法:
- 人类结核病组织 (死前和死后) 使用RNAscope检测Mtb mRNA.被检查.
- 采用双ZN/免疫组织化学染色方法来识别AFB和85B抗原 (Ag85B) 产生的细菌.
主要成果:
- RNAscope成功识别了完整和分解的Mtb细菌,以及细胞内和细胞外的MtbmRNA.
- Mtb mRNA在颗粒瘤内呈现区域分布,并在ZN阴性肺组织和Ag85B阳性支气管上皮质中检测到.
- 在宿主细胞细胞质中观察到Mtb mRNA和Ag85B的积累,在ZN阴性淋巴结活检中发现Mtb mRNA.
结论:
- RNAscope通过检测结核病患者的ZN阴性组织中mtbmRNA的诊断潜力,包括死前活检.
- 这种方法可以指导治疗干预,并为RNAscope作为结核病诊断和Mtb生物学研究的平台提供概念验证.
- 这些发现表明,在体内至少存在两种表型上不同的Mtb细菌群.
相关概念视频
In-situ Hybridization
9.4K
In situ hybridization (ISH) is a technique used to detect and localize specific DNA or RNA molecules in cells, tissue, or tissue sections using a labeled probe. The technique was first used in 1969 for the investigation of nucleic acids. It is currently an essential tool in scientific research and clinical settings, especially for diagnostic purposes.
Types of probes and labels
A probe is a complementary strand of DNA or RNA that binds to corresponding nucleotide sequences in a cell. Many...
Types of probes and labels
A probe is a complementary strand of DNA or RNA that binds to corresponding nucleotide sequences in a cell. Many...
9.4K
FISH - Fluorescent In-situ Hybridization
20.8K
Fluorescence in situ hybridization, or FISH, was developed in the early 1980s and has quickly become one of the most widely used techniques in cytogenetics. Labeled probes are used to bind complementary DNA or RNA sequences on a chromosome or in a region within a cell. Earlier, the probes could only be obtained by cloning or reverse transcription of a DNA template. Currently, the probe oligonucleotides can be synthesized synthetically. Additionally, with the advancement of optical techniques,...
20.8K


