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使用单细胞显微拉曼光谱法对小耳畸形患者不同软骨形成细胞群的表征

Characterization of Distinct Chondrogenic Cell Populations of Patients Suffering from Microtia Using Single-Cell Micro-Raman Spectroscopy.

作者信息

Zielinska Dominika, Yosef Hesham K, Zollitsch Tilo, Kern Johann, Jakob Yvonne, Gvaramia David, Rotter Nicole, Pontiggia Luca, Moehrlen Ueli, Biedermann Thomas, Klar Agnes S

机构信息

Tissue Biology Research Unit, University Children's Hospital Zurich, 8952 Schlieren, Switzerland.

Children's Research Center, University Children's Hospital Zurich, 8032 Zurich, Switzerland.

出版信息

Biomedicines. 2023 Sep 21;11(9):2588. doi: 10.3390/biomedicines11092588.

Abstract

Microtia is a congenital condition of abnormal development of the outer ear. Tissue engineering of the ear is an alternative treatment option for microtia patients. However, for this approach, the identification of high regenerative cartilage progenitor cells is of vital importance. Raman analysis provides a novel, non-invasive, label-free diagnostic tool to detect distinctive biochemical features of single cells or tissues. Using micro-Raman spectroscopy, we were able to distinguish and characterize the particular molecular fingerprints of differentiated chondrocytes and perichondrocytes and their respective progenitors isolated from healthy individuals and microtia patients. We found that microtia chondrocytes exhibited lower lipid concentrations in comparison to healthy cells, thus indicating the importance of fat storage. Moreover, we suggest that collagen is a useful biomarker for distinguishing between populations obtained from the cartilage and perichondrium because of the higher spectral contributions of collagen in the chondrocytes compared to perichondrocytes from healthy individuals and microtia patients. Our results represent a contribution to the identification of cell markers that may allow the selection of specific cell populations for cartilage tissue engineering. Moreover, the observed differences between microtia and healthy cells are essential for gaining better knowledge of the cause of microtia. It can be useful for designing novel treatment options based on further investigations of the discovered biochemical substrate alterations.

摘要

小耳畸形是一种外耳发育异常的先天性疾病。耳部组织工程是小耳畸形患者的一种替代治疗选择。然而,对于这种方法,鉴定高再生能力的软骨祖细胞至关重要。拉曼分析提供了一种新颖的、非侵入性的、无标记的诊断工具,用于检测单细胞或组织的独特生化特征。利用显微拉曼光谱,我们能够区分并表征从健康个体和小耳畸形患者分离出的分化软骨细胞、软骨膜细胞及其各自祖细胞的特定分子指纹。我们发现,与健康细胞相比,小耳畸形软骨细胞的脂质浓度较低,从而表明脂肪储存的重要性。此外,我们认为胶原蛋白是区分从软骨和软骨膜获得的细胞群体的有用生物标志物,因为与健康个体和小耳畸形患者的软骨膜细胞相比,软骨细胞中胶原蛋白的光谱贡献更高。我们的结果为鉴定细胞标志物做出了贡献,这些标志物可能有助于选择用于软骨组织工程的特定细胞群体。此外,观察到的小耳畸形细胞与健康细胞之间的差异对于更好地了解小耳畸形的病因至关重要。基于对发现的生化底物改变的进一步研究,这对于设计新的治疗方案可能是有用的。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9bd2/10526501/47fae2e0d2ca/biomedicines-11-02588-g001.jpg

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