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North China University of Science and Technology

5 ARTICLES PUBLISHED IN JoVE

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Genetics

In Situ Labeling of Mitochondrial DNA Replication in Drosophila Adult Ovaries by EdU Staining
Zhe Chen 1, Hong Xu 1
1Lab of Molecular Genetics, National Heart, Lung and Blood Institute, National Institutes of Health

Drosophila oogenesis continues to be exceptionally useful in the study of mitochondrial proliferation and inheritance. This manuscript describes a detailed protocol used to label the replicating mitochondrial DNA (mtDNA) in Drosophila adult ovaries with 5-ethynyl-2´-deoxyuridine (EdU), which facilitates uncovering mechanisms associated with mitochondrial inheritance that were previously debatable.

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Bioengineering

3D Microtissues for Injectable Regenerative Therapy and High-throughput Drug Screening
Yaqian Li *1,2, Xiaojun Yan *1, Wei Liu *1, Lyu Zhou 1,3, Zhifeng You 1, Yanan Du 1,2
1Department of Biomedical Engineering, School of Medicine, Tsinghua University, 2Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, 3School of Life Sciences, Tsinghua University

This protocol describes the fabrication of elastic 3D macroporous microcryogels by integrating microfabrication with cryogelation technology. Upon loading with cells, 3D microtissues are generated, which can be readily injected in vivo to facilitate regenerative therapy or assembled into arrays for in vitro high-throughput drug screening.

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Biochemistry

Preparation of High-Quality Fermented Fish Product
Fang Yang *1, Lu-Lu Zhu *1, Yu-Duan Diao 1, Pei Gao 1, Da-Wei Yu 1, Pei-Pei Yu 1, Qi-Xing Jiang 1, Yan-Shun Xu 1, Wen-Shui Xia 1, Xiao-Bei Zhan 2
1State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, 2The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University

The goal of the protocol is to provide an industrialized fish fermentation technique based on inoculation of Saccharomyces cerevisiae.

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Biology

Quantification of Proliferative and Dead Cells in Enteroids
Hua-Shan Li *1, Shao-Fang Xu *1, Jian-Ying Sheng *1, Zhi-Hui Jiang 1, Jing Wang 1, Ning Ding 1, Tao Wang 1, Matthew A. Odenwald 2, Jerrold R. Turner 2,3, Wei-Qi He 1, Hong Xu 1, Juan-Min Zha 1
1Jiangsu Key Laboratory of Neuropsychiatric Diseases and Cambridge-Suda (CAM-SU) Genomic Resource Center, Medical College of Soochow University, Department of Oncology, The First Affiliated Hospital of Soochow University, 2Department of Pathology, University of Chicago, 3Department of Pathology, Brigham and Women's Hospital–Harvard Medical School

The presented protocol uses flow cytometry to quantify the number of proliferating and dead cells in cultured mouse enteroids. This method is helpful to evaluate the effects of drug treatment on organoid proliferation and survival.

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Medicine

Establishing a Silicosis Rat Model via Exposure of Whole-Body to Respirable Silica
Fuyu Jin 1, Yaqian Li 1, Tian Li 1, Xinyu Yang 1, Wenchen Cai 1, Shifeng Li 1, Xuemin Gao 1, Fang Yang 1, Hong Xu 1, Heliang Liu 1
1Hebei Key Laboratory for Organ Fibrosis Research, School of Public Health, North China University of Science and Technology

This study describes a technique to establish a silicosis rat model with the inhalation of silica through the whole body in an inhalation chamber. The rats with silicosis could closely mimic the pathological process of human silicosis in an easy, cost-effective manner with good repeatability.

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