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Biomedical subjects

Hui-yong Jiang

Publications and source records attributed to Hui-yong Jiang.

5 recordsLinked to original sources

A new method to make nuclei or cell microarrays.

We invented a new method to make microarrays using nuclei extracted from paraffin-embedded tissues or cultured cells. A blank recipient paraffin block with 10 x 10 cores was constructed and sectioned to make the mold for the cell arrays. The sections of paraffin were mounted on poly-L-lysine-coated slides. Prepared nuclei or cells were injected into the cores of the paraffin mold. The slides were dried and dewaxed and nuclei or cell arrays were made. Using this method, we successfully made microarrays of nuclei extracted from diffuse large B-cell lymphoma paraffin-embedded tissues, nasopharyngeal cancer and lymphoma cell lines. This technique resulted in a paraffin-embedded cell preparation that yielded a cell density of approximately 500 to 1000 or 800 cells on average per 0.6-mm-diameter core. The microarrays were successfully used in fluorescence in situ hybridization, mRNA in situ hybridization, and cytohistochemical staining.

Cell Line, Tumor↗

[Expression and cloning of mCD99L2 gene from mouse B lymphoma cell line A20 and construction of its eukaryotic expression vector].

OBJECTIVE: To detect and clone mCD99L2 gene from mouse B lymphoma cell line A20 and construct its eukaryotic expression vector pcDNA3.1-mCD99L2. METHODS: The expression of mCD99L2 mRNA in A20 cell line was detected by in situ hybridization. The total RNA of A20 cells was extracted to obtain the full-length cDNA of the coding region of mCD99L2 gene by RT-PCR, the product of which was ligated into pMD18-T vector and the DNA sequence of the insert was detected. The coding regions of mCD99L2 gene was amplified from pMD-mCD99L2 by PCR using primers containing EcoR I and Xho I sites and cloned into the eukaryotic expression vector pcDNA3.1/MycHis(+). RESULTS: In situ hybridization identified positive expression of mCD99L2 gene in the A20 cell line. The full-length cDNA of mCD99L2 coding region of A20 cell line was obtained by RT-PCR, which yielded a product of 712 bp as expected, and the DNA sequence was completely homologus to the mCD99L2 cDNA reported in GenBank. Restriction endonuclease digestion and DNA sequencing indicated that the eukaryotic expression vector pcDNA3.1(+)- mCD99L2 had been constructed successfully. CONCLUSION: mCD99L2 cDNA has been cloned from mouse B lymphoma cell line A20 and its eukaryotic expression vector pcDNA3.1(+)- mCD99L2 successfully constructed, which facilitates further functional study of mCD99L2 gene in mouse B lymphoma cell line A20.

12E7 Antigen↗

[Cloning of human KIAA1173 gene and biological characterization of transfected 6-10B cells].

OBJECTIVE: To establish a 6-10B cell line with stable expression of KIAA1173 gene and study the biological behaviors of the cells. METHODS: The total RNA was extracted from normal skeletal muscular tissues for cloning of KIAA1173 gene by means of RT-PCR which was subsequently introduced into pcDNA3.1 (+) vector. The recombinant eukaryotic expression vector pcDNA 3.1(+)-KIAA1173 was constructed and identified by endonuclease digestion and sequencing before transfection into 6-10B cells via lipofectamine with the empty vector as the control. The positive cell clones were obtained by G418 selection. Stable expression of KIAA1173 gene in the transfected 6-10B cells was determined by RT-PCR, in situ hybridization and immunocytochemistry, and the biological behaviors of the transfected cells were observed by MTT assay, cell invasion assay and tumorigenesis assay in nude mice. RESULTS: High expression of KIAA1173 at both mRNA and protein levels was observed in the transfected 6-10B cells. The capability of proliferation, invasion and tumorgenicity of the KIAA1173-transfected cells in nude mice was lowered in comparison with those of the cells transfected with pcDNA3.1 (+) vector (P<0.05). CONCLUSIONS: KIAA1173 genes may function as a potential tumor suppressor of nasopharyngeal carcinoma both in vitro and in vivo. The 6-10B cell line expressing KIAA1173 has been obtained, which can be helpful for further study of KIAA1173 gene.

Animals↗

[Construction and application of Access database of colorectal carcinoma cases].

OBJECTIVE: To construct a database using Access software in which clinical information of colorectal cancer cases can be loaded, to facilitate relevant large-sample clinical studies. METHODS: A retrospective study was conducted in 1 374 cases of colorectal carcinoma with surgical treatment between 1975 to 1999 in Nanfang Hospital. According to the National Standards for Pathological Study of Colorectal Carcinoma, an Access2000 database consisting of 1 145 pathologically confirmed colorectal carcinoma cases was established, designated as The Specialized Access Database of Colorectal Carcinoma. RESULTS AND CONCLUSION: The database system has been successfully constructed and operates smoothly, which possesses powerful capacity for information processing of colorectal cancer cases.

Adolescent↗