scholarly journals Subsets of ATP-sensitive potassium channel (KATP) inhibitors increase gap junctional intercellular communication in metastatic cancer cell lines independent of SUR expression

FEBS Letters ◽  
2011 ◽  
Vol 586 (1) ◽  
pp. 27-31 ◽  
Author(s):  
Thomas M. Bodenstine ◽  
Kedar S. Vaidya ◽  
Aimen Ismail ◽  
Benjamin H. Beck ◽  
Anne R. Diers ◽  
...  
Keyword(s):  
Potassium Channel ◽  
Cell Lines ◽  
Cancer Cell ◽  
Intercellular Communication ◽  
Metastatic Cancer ◽  
Cancer Cell Lines ◽  
Gap Junctional Intercellular Communication ◽  
Metastatic Cancer Cell ◽  
Gap Junctional

Disruption of gap junctional intercellular communication in human renal cancer cell lines

Urology ◽  
1999 ◽  
Vol 53 (1) ◽  
pp. 218-222 ◽  
Author(s):  
Mitsuru Noguchi ◽  
Koichiro Nomata ◽  
Jun-ichi Watanabe ◽  
Hidesuke Sato ◽  
Hiroshi Kanetake ◽  
...  
Keyword(s):  
Cell Lines ◽  
Cancer Cell ◽  
Renal Cancer ◽  
Intercellular Communication ◽  
Cancer Cell Lines ◽  
Gap Junctional Intercellular Communication ◽  
Renal Cancer Cell ◽  
Gap Junctional

scholarly journals Ouabain Promotes Gap Junctional Intercellular Communication in Cancer Cells

2020 ◽  
Vol 22 (1) ◽  
pp. 358
Author(s):  
Mauricio Serrano-Rubi ◽  
Lidia Jimenez ◽  
Jacqueline Martinez-Rendon ◽  
Marcelino Cereijido ◽  
Arturo Ponce
Keyword(s):  
Cancer Cells ◽  
Cell Lines ◽  
Cancer Cell ◽  
Intercellular Communication ◽  
Cancer Cell Lines ◽  
Molecular Structures ◽  
Dye Transfer ◽  
Gap Junctional Intercellular Communication ◽  
Therapeutic Properties ◽  
Gap Junctional

Gap junctions are molecular structures that allow communication between neighboring cells. It has been shown that gap junctional intercellular communication (GJIC) is notoriously reduced in cancer cells compared to their normal counterparts. Ouabain, a plant derived substance, widely known for its therapeutic properties on the heart, has been shown to play a role in several types of cancer, although its mechanism of action is not yet fully understood. Since we have previously shown that ouabain enhances GJIC in epithelial cells (MDCK), here we probed whether ouabain affects GJIC in a variety of cancer cell lines, including cervico-uterine (CasKi, SiHa and Hela), breast (MDA-MB-321 and MCF7), lung (A549), colon (SW480) and pancreas (HPAF-II). For this purpose, we conducted dye transfer assays to measure and compare GJIC in monolayers of cells with and without treatment with ouabain (0.1, 1, 10, 50 and 500 nM). We found that ouabain induces a statistically significant enhancement of GJIC in all of these cancer cell lines, albeit with distinct sensitivity. Additionally, we show that synthesis of new nucleotides or protein subunits is not required, and that Csrc, ErK1/2 and ROCK-Rho mediate the signaling mechanisms. These results may contribute to explaining how ouabain influences cancer.

scholarly journals Riceberry rice bran protein hydrolyzed fractions induced apoptosis, senescence and G1/S cell cycle arrest in human colon cancer cell lines

2021 ◽  
Author(s):  
Vichugorn Wattayagorn ◽  
Mesayamas Kongsema ◽  
Sukuntaros Tadakittisarn ◽  
Pramote Chumnanpuen
Keyword(s):  
Colon Cancer ◽  
Cell Lines ◽  
Cancer Cell ◽  
Rice Bran ◽  
Metastatic Cancer ◽  
Cancer Cell Lines ◽  
Colon Cancer Cell ◽  
Colon Cancer Cell Lines ◽  
Metastatic Cancer Cell ◽  
Ht 29

Riceberry rice bran is the part of rice that has been scrubbed out during coloring process. There are various health benefits with high protein content and antioxidant ability. The hydrolyzed rice bran consists of diverse peptides that provide various bioactive properties. This work aimed to study the effect of hydrolyzed riceberry rice bran extracted on colon cancer cell lines (HT- 29 and SW- 620) compared to normal cell (PCS- 291- 010). The MTT assay result showed that our extract has less cytotoxicity on normal cell (PCS-291-010, IC50 = 6,680.00 µg/ml) compared to the colon cancer cell lines and has more effect on metastatic cancer cell line (SW-620, IC50 = 5,492.31 µg /ml) than non-metastatic cancer cell line (HT-29, IC50 =6,040.76 µg/ml). According to the DNA fragmentation pattern analysis, the ladder pattern indicated that the rice bran extract can induce the apoptosis process in SW-620 cell line. Confirmed the pattern of apoptotic cell by AO/PI double stain test and quantified apoptotic cells by Annexin V. For the cell senescence analysis, SA-β-gal staining technique was performed at 24 h after treatments, HT-29 reached maximum senescence rate at 85.74% while SW-620 had only 17.23% of senescence. And a result of cell cycle analysis, HT-29 were decreased the number of cells in S, M/G2 phase, and increased the number of cells in G0/G1 phase. Furthermore > 50 kDa peptide fraction separated from HRBE has a potent anti-cancer cells (SW-620, IC50 = 4,908 µg/ml). In conclusion, the hydrolyzed riceberry rice bran extract can inhibit colon cancer cell lines with less effect on normal cell. The extracts could induce apoptosis process in metastatic cancer cell and induce senescence process in non-metastatic cancer cell. This observed information will be useful and applicable for medical research and colon cancer treatment in the future.

scholarly journals High-throughput measurement of gap junctional intercellular communication

2014 ◽  
Vol 306 (12) ◽  
pp. H1708-H1713 ◽  
Author(s):  
Jun Liu ◽  
Vinayakumar Siragam ◽  
Jun Chen ◽  
Michael D. Fridman ◽  
Robert M. Hamilton ◽  
...  
Keyword(s):  
Gap Junctions ◽  
Gap Junction ◽  
Cell Lines ◽  
High Throughput ◽  
Intercellular Communication ◽  
Dye Transfer ◽  
Gap Junctional Intercellular Communication ◽  
Cell Injection ◽  
Operation Speed ◽  
Gap Junctional

Gap junctional intercellular communication (GJIC) is a critical part of cellular activities and is necessary for electrical propagation among contacting cells. Disorders of gap junctions are a major cause for cardiac arrhythmias. Dye transfer through microinjection is a conventional technique for measuring GJIC. To overcome the limitations of manual microinjection and perform high-throughput GJIC measurement, here we present a new robotic microinjection system that is capable of injecting a large number of cells at a high speed. The highly automated system enables large-scale cell injection (thousands of cells vs. a few cells) without major operator training. GJIC of three cell lines of differing gap junction density, i.e., HeLa, HEK293, and HL-1, was evaluated. The effect of a GJIC inhibitor (18-α-glycyrrhetinic acid) was also quantified in the three cell lines. System operation speed, success rate, and cell viability rate were quantitatively evaluated based on robotic microinjection of over 4,000 cells. Injection speed was 22.7 cells per min, with 95% success for cell injection and >90% survival. Dye transfer cell counts and dye transfer distance correlated with the expected connexin expression of each cell type, and inhibition of dye transfer correlated with the concentration of GJIC inhibitor. Additionally, real-time monitoring of dye transfer enables the calculation of coefficients of molecular diffusion through gap junctions. This robotic microinjection dye transfer technique permits rapid assessment of gap junction function in confluent cell cultures.

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