OBJECTIVESTo study the effects of tumor suppressor in lung cancer-1 (TSLC1) on human hepatocyte carcinoma cell line HepG2.

METHODSA full length of TSLC1 cDNA was amplified from RNA of normal human liver cells by RT-PCR, and it was cloned into a pCI-neo expression vector and transfected into human hepatocellular carcinoma cell line HepG2. The HepG2 cells transfected with this plasmid (experimental group) and those treated with pCI-neo vector (control group) and without any treatment (blank group) were compared. Cell morphology was studied microscopically and cell growth was analyzed with MTT assay. FACSort flow cytometry analysis was performed to assess the cell cycle distribution and apoptosis.

RESULTSA stable cell line expressing TSLC1 protein was successfully established. Morphologically, cells of the experimental group were tightly aggregated when compared with those of the control and blank groups. The growth of TSLC1-transfected cells was significantly suppressed in vitro compared with those of the control and blank groups. The amount of G0-G1 cells was 63.66%+/-3.83% (P less than 0.01) in the experimental group, while those of the control and blank groups were 47.45%+/-0.91% and 54.47%+/-0.96% respectively. The amount of S phase cells in the experimental group, 22.90%+/-6.04%, was significantly lower (P less than 0.05) than that of the control group (36.58%+/-0.61%) and the blank group (33.61%+/-2.99%), which suggested a G0-G1 cell cycle arresting. The number of cells in early and late phase apoptosis (17.09%+/-0.20% and 16.11%+/-0.40% respectively) were significantly higher than those of the control and blank groups (P less than 0.01).

CONCLUSIONSTSLC1 strongly inhibits the growth of HepG2 cells in vitro and induces apoptosis of the cells, suggesting that TSLC1 may have a tumor suppressor function in HCC.

Apoptosis ; genetics ; Cell Adhesion Molecule-1 ; Cell Adhesion Molecules ; Cell Proliferation ; Hep G2 Cells ; Humans ; Immunoglobulins ; genetics ; Membrane Proteins ; genetics ; Transfection ; Tumor Suppressor Proteins ; genetics

OBJECTIVETo establish a minigene model of neural cell adhesion molecule L1 (NCAM L1) gene and to study its splicing patterns in different cell lines.

METHODSUsing human genetic cDNA as template, the NCAM L1 minigene fragment was amplified and inserted into eukaryotic expression vector. The minigene was transfected into 4 cell lines and the splicing patterns of NCAM L1 minigene in these cell lines were studied.

RESULTSThe splicing patterns of NCAM L1 minigene were different in individual cell lines. In PFSK and Hela cell lines, two splicied isoforms were generated but in COS-1 and R28 cell lines, only one isoform existed.

CONCLUSIONNCAM L1 minigene model can be used in alternative splicing analysis.

Cell Line ; Genetic Vectors ; Humans ; Neural Cell Adhesion Molecule L1 ; genetics ; Plasmids ; genetics ; RNA Splicing ; Transfection

Gelatinous drop-like corneal dystrophy (GDLD) is an autosomal recessive hereditary disease, which may result in bilateral loss of vision. The gene responsible for GDLD, M1S1 is mapped on the short arm of chromosome 1 (1p), but the possible etiology of this disease remains unclear. Corneal transplantation is the only treatment for visual rehabilitation. The detection of the mutations of the M1S1 gene and the possible etiological involvement of the amyloid deposits are discussed. The current literatures are extensively reviewed in this article.
Antigens, Neoplasm ; genetics ; Cell Adhesion Molecules ; genetics ; Chromosomes, Human, Pair 1 ; genetics ; Corneal Dystrophies, Hereditary ; diagnosis ; genetics ; therapy ; DNA Mutational Analysis ; Epithelial Cell Adhesion Molecule ; Humans ; Mutation

OBJECTIVETo study mechanisms of reduction of the malignant activities of human naso-pharyngeal carcinoma cell CNE-2L2 induced by ectopic expression of BCSC-1 gene.

METHODSDNA was stained with propidium iodide and assayed upon a flow cytometer. Chromosomes were stained with Hoechest 33258. Adhesion of CNE-2L2 cells was detected by cell aggregation test. Protein expression on CNE-2L2 cells was examined by Western blot.

RESULTSCell cycle analysis showed that the percentage of CNE-2L2 cells was 55.1%, 43.4%, and 39.4% in G0/G1 phase, 25.2%, 28.7%, and 30.9% in S phase, and 19.7%, 27.9%, and 29.7% in G2/M phase for the cell with ectopic expression of BCSC-1 gene, wild type cell (W cells), and the cell transduced with the mock (M cell). Many mitotic cells were found in W cells and M cells. In contrast, almost no mitotic cell was observed in the cells with ectopic expression of BCSC-1 gene. Ectopic BCSC-1 expression resulted in cell aggregation, enhanced expression of E-cadherin, cx-catenin, and p53.

CONCLUSIONSEctopic BCSC-1 expression causes enhancement of adhesion of CNE-2L2 cells associated with enhanced expression of E-cadherin and alpha-catenin, arrest of cell in G1 phase, which may be associated with enhanced expression of p53. These alteration may play a role in the reduction of malignant activities of the cells with ectopic expression of BCSC-1 gene.

Cell Adhesion ; Cell Cycle ; physiology ; Cell Line, Tumor ; Humans ; Nasopharyngeal Neoplasms ; Neoplasm Proteins ; biosynthesis ; genetics

Cell Adhesion ; Cell Movement ; Cell Proliferation ; Hep G2 Cells ; Humans ; Indoleamine-Pyrrole 2,3,-Dioxygenase ; genetics ; Transfection

Cell Adhesion ; drug effects ; Cell Movement ; drug effects ; Focal Adhesion Kinase 1 ; genetics ; metabolism ; Focal Adhesion Protein-Tyrosine Kinases ; Neoplasms ; Phosphorylation

In mankind, the circulation system is a closed pressure-loaded system; the pressure in circulation flow field would change with the variation of natural or pathological geometry of the local bloodvessel, and the pressure shift induced by the variation of vascular geometry would lead to a series of physiological and pathological changes in the endothelial cells (ECs). This experiment is designed to elucidate the effects of different pressure shift on F-actin alignment and expression in cultured endothelial cells in vitro, and to investigate the relationship between the altered pressure shift and the expression intensity of Vascular adhesion molecule (VCAM) and Integrin alphaVbeta3. Non-activated cultured ECs and single shear stress loaded ECs as control group were set, the double-immuno-fluoro-cytochemistry, laser confocal scanning microscopy and image analysis system were used to observe the expression of VCAM, Integrin alphaVbeta3 and F-actin in endothelial cells which were exposed to levels of pressure shift in an improved parallel plate flow chamber. When exposed to different decreased pressure shift, the expression intensity of VCAM, Integrin alphaVbeta3 and F-actin showed regular changes. The decreased pressure shift resulted in changes in cell alignment and cytoskeleton F-actin, and also affected ECs adhesion function and transmembrane mechanotransduction function which were represented by VCAM and Integrin alphaVbeta3 respectively.
Actins ; genetics ; metabolism ; Cell Adhesion ; Cells, Cultured ; Endothelial Cells ; cytology ; metabolism ; Hemodynamics ; Humans ; Integrin alphaVbeta3 ; genetics ; metabolism ; Pressure ; Umbilical Veins ; cytology ; Vascular Cell Adhesion Molecule-1 ; genetics ; metabolism

OBJECTIVE: To analyze L1CAM gene mutation in a family featuring X-linked recurrent fetal hydrocephalus. METHODS: The family had three pregnancies where a male fetus was detected at 22 weeks with hydrocephalus by ultrasonography. DNA was extracted from peripheral blood samples from the parents as well as fetal tissue from the third abortion. The fetal DNA was subjected to testing of folic acid metabolism ability gene and chromosomal microarray analysis (CMA). Next-generation sequencing (NGS) was employed to detect potential mutation of related genes. Suspected mutation was verified by Sanger sequencing. RESULTS: Testing of folic acid metabolism ability gene (MTHFR C677T) and CMA were both normal. A c.512G>A (p.Trp171Ter) hemizygous mutation of the L1CAM gene was detected in the fetal tissue, which was inherited from the phenotypically normal mother. The novel mutation was predicted to be pathogenic. CONCLUSION The c.512G>A (p.Trp171Ter) mutation of the L1CAM gene probably underlies the X-linked hydrocephalus in this family. Screening of L1CAM gene variations should be carried out for couples experiencing recurrent fetal hydrocephalus affecting the male gender.
Cerebral Aqueduct ; Female ; Humans ; Hydrocephalus ; genetics ; Male ; Mutation ; Neural Cell Adhesion Molecule L1 ; genetics ; Pedigree ; Pregnancy

OBJECTIVETo explore the effect of hemangiopoietin (HAPO) on the adhesive properties of human umbilical vein endothelial cells (HUVEC).

METHODSThe adhesion of HUVEC and the expressions of CD54, CD102, CD106, CD31, CD62E, and CD62P were measured by adhesion assay, flow cytometry, and semi-quantitative RT-PCR.

RESULTSHAPO enhanced the total adherence of HUVEC in a concentration-dependent manner. Flow cytometry analysis revealed that the treatment of HAPO resulted in a significantly increased expression of CD106 and CD62E on HUVEC in a time-dependent manner. When HUVEC were incubated with HAPO for 6 h, the percentage of CD106 + HUVEC and CD62E HUVEC increased about 2.10 folds and 5.84 folds, respectively, compared with control. The time-course of adhesive molecules mRNA expression indicated that the expression of CD106 and CD62E reached at the maximum 1.86 folds and 6.16 folds, respectively, compared with control.

CONCLUSIONHAPO may facilitate the homing of hematopoietic stem/progenitor cells.

Cell Adhesion Molecules ; metabolism ; Cells, Cultured ; E-Selectin ; biosynthesis ; genetics ; Endothelial Cells ; cytology ; Humans ; Intercellular Adhesion Molecule-1 ; biosynthesis ; genetics ; Proteoglycans ; pharmacology ; RNA, Messenger ; biosynthesis ; genetics ; Umbilical Veins ; cytology ; Vascular Cell Adhesion Molecule-1 ; biosynthesis ; genetics

Three-dimensional (3D) culture of cells could closely mimic the in vivo situation with regard to cell function and microenvironment compared with plane monolayer cultured cells. In this paper, we established 3D culture of rat WB-F344 cells with rotary cell culture system (RCCS) to simulate microgravity environment, and examined cells proliferation, morphology, microstructure, E-cadherin protein quantity and mRNA expression of adhesion molecules by count the number of cells, optical microscope, transmission electron microscope and reverse transcriptase-polymerase chain reaction (RT-PCR). The results demonstrated that cells were polyhedron with lots of micovilli and mitochondria, which grow well and packed together densely to form irregular aggregates. Adjacent cells were connected with desmosome and tight junction. With the regard, the aggregates behaved 3D growth characteristics. Moreover, compared with control, mRNA level of Fibronectin and E-cadherin protein were increased, the changes maybe is the part mechanism in this microgravity simulated cells culture models which strengthened cells junction. This rotating 3D model might facilitate the study of interactions of cell-cell, cell-matrix and the mechanisms.
Animals ; Cadherins ; genetics ; Cell Adhesion ; Cell Culture Techniques ; methods ; Cell Proliferation ; Fibronectins ; genetics ; Rats ; Spheroids, Cellular ; ultrastructure ; Weightlessness Simulation