National Engineering Research Center of Oral Biomaterial and Digital Medical Devices 2 articles published in JoVE Medicine Isolation of Cells with Morphological and Spatial Information from Oral Submucous Fibrosis Samples by Laser Capture Microdissection Xinjia Cai1,2, Heyu Zhang3, Jianyun Zhang1,2, Tiejun Li1,2 1Department of Oral Pathology, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, 2Research Unit of Precision Pathologic Diagnosis in Tumors of the Oral and Maxillofacial Regions, Chinese Academy of Medical Sciences (2019RU034), 3Central Laboratory, Peking University School and Hospital of Stomatology Laser capture microdissection of oral submucous fibrosis tissues allows for precise extraction of cells from histological regions of interest for the analysis of multi-omics data with morphological and spatial information. Biology In Vivo Vascular Permeability Detection in Mouse Submandibular Gland Xiangdi Mao1, Sainan Min2, Qihua He3, Xin Cong1 1Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, and Beijing Key Laboratory of Cardiovascular Receptors Research, 2Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Reseah Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, 3State Key Laboratory of Natural and Biomimetic Drugs, Peking University In the present protocol, the endothelial barrier function of the submandibular gland (SMG) was evaluated by injecting different molecular weighted fluorescent tracers into the angular veins of test animal models in vivo under a two-photon laser-scanning microscope.