Transcriptional regulation of the COX-2 expression by nitric oxide in colon cancer cell lines

Prostanoids play an important role in a variety of physiological and pathophysiological processes including inflammation and cancer. The rate-limiting step in the prostanoid biosynthesis pathway is catalyzed by cyclooxygenases (COXs). Aberrant expression of the inducible isoform COX-2 plays a significant role in colon cancer initiation and progression. In this study, we have hypothesized that COX-2 specific inhibitors such as Valdecoxib (VLX), being highly hydrophobic, may alter biophysical properties of cellular lipids. In this study, COX-2 expressing (HT29) and COX-2 non-expressing (SW620) colon cancer cell lines were treated with VLX and examined using attenuated total reflection infrared spectroscopy. The results revealed that VLX treatment decreased lipid fluidity in the cells irrespective of COX-2 expression status and affected order parameters of the lipids in both cell lines. Cluster analysis also indicated that the spectral differences between the two cell lines are profound and could be successfully differentiated. Valdecoxib treatment could enhance the composition, order and dynamics of the lipids of colon cancer cells independently of its COX-2 inhibitory mechanism. Valdecoxib has therapeutic effects upon colon cancer, therefore it can be used as an adjuvant and/or chemopreventive agent for colon cancer.

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The −1195G allele increases the transcriptional activity of cyclooxygenase-2 gene (COX-2) in colon cancer cell lines

Molecular Carcinogenesis ◽

10.1002/mc.22049 ◽

2013 ◽

Vol 53 (S1) ◽

pp. E92-E95 ◽

Cited By ~ 6

Author(s):

Carina Pereira ◽

Hugo Sousa ◽

Joana Silva ◽

Carla Brandão ◽

Claudio Elgueta-Karstegl ◽

...

Keyword(s):

Colon Cancer ◽

Cell Lines ◽

Cancer Cell ◽

Transcriptional Activity ◽

Cancer Cell Lines ◽

Colon Cancer Cell ◽

Cyclooxygenase 2 ◽

Colon Cancer Cell Lines ◽

Cox 2

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Correspondence re: M. V. Swamy et al., Inhibition of COX-2 in Colon Cancer Cell Lines by Celecoxib Increases the Nuclear Localization of Active p53. Cancer Res 2003;63:5239–42.

Cancer Research ◽

10.1158/0008-5472.can-03-3145 ◽

2004 ◽

Vol 64 (8) ◽

pp. 2937-2938 ◽

Cited By ~ 1

Author(s):

Axel H. Schönthal

Keyword(s):

Colon Cancer ◽

Cell Lines ◽

Cancer Cell ◽

Nuclear Localization ◽

Cancer Cell Lines ◽

Colon Cancer Cell ◽

Colon Cancer Cell Lines ◽

Cox 2

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Isolation of Cardamonin and Pinostrobin Chalcone from the Rhizomes of Boesenbergia rotunda (L.) Mansf. and their Cytotoxic Effects on H-29 and MDA-MB-231 Cancer Cell Lines

The Natural Products Journal ◽

10.2174/2210315509666190117151542 ◽

2019 ◽

Vol 9 (4) ◽

pp. 341-348 ◽

Cited By ~ 4

Author(s):

Ibrahim Awad Mohammed ◽

Muhammad Nadeem Akhtar ◽

Foo Jhi Biau ◽

Yin Sim Tor ◽

Seema Zareen ◽

...

Keyword(s):

Breast Cancer ◽

Colon Cancer ◽

Cell Lines ◽

Cancer Cell ◽

Breast Cancer Cell ◽

Chemical Constituents ◽

Cancer Cell Lines ◽

Colon Cancer Cell ◽

Colon Cancer Cell Lines ◽

Ht 29

Background: Breast cancer and human colon cancer are the most common types of cancer in females and males, respectively. Breast cancer is the most common type of cancer after lung and colon cancers. Natural products are an important source for drug discovery. Boesenbergia rotunda (L.) Mansf. is commonly known as finger root, belonging to the Zingiberaceae family. Objective: The aim of this study to isolate some natural compounds from the rhizomes of B. rotunda (L.) Mansf., and to investigate their cytotoxicity against the human triple-negative breast cancer cell (MDA-MB-231) and HT-29 colon cancer cell lines. Methods: The dried rhizomes of B. rotunda were extracted with methanol. The methanolic extract was further used for solvent-solvent extraction. Bioassay-guided extraction and isolation of the rhizomes of the B. rotunda exhibited cytotoxic properties of hexane and dichloromethane fractions. Results: Six major chemical constituents, pinostrobin (1), pinostrobin chalcone (2), cardamonin (3), 4,5-dihydrokawain (4), pinocembrin (5), and alpinetin (6) were isolated from the rhizomes of the B. rotunda. All the chemical constituents were screened against the human triple-negative breast cancer cell (MDA-MB-231) and HT-29 colon cancer cell lines. The compound cardamonin (3) (IC50 = 5.62±0.61 and 4.44±0.66 µg/mL) and pinostrobin chalcone (2), (IC50 = 20.42±2.23 and 22.51±0.42 μg/mL) were found to be potent natural cytotoxic compounds against MDA-MB-231 and HT-29 colon cancer cell lines, respectively. Conclusion: Cardamonin (3) and pinostrobin chalcone (2) were found to be the most potential natural compounds against breast cancer cell line MDA-MB-231 and colon cancer HT-29 cell line.

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Reactivity of Monoclonal Antibodies Directed against Lung Cancer Antigens with Human Lung, Breast and Colon Cancer Cell Lines

Disease Markers ◽

10.1155/1993/619781 ◽

1993 ◽

Vol 11 (5-6) ◽

pp. 225-237

Author(s):

Udo Schumacher ◽

Dhia Mukthar ◽

Thomas Schenker

Keyword(s):

Breast Cancer ◽

Lung Cancer ◽

Colon Cancer ◽

Cell Lines ◽

Cancer Cell ◽

Cancer Cell Lines ◽

Colon Cancer Cell ◽

Breast Cancer Cell Lines ◽

Cancer Antigens ◽

Colon Cancer Cell Lines

A panel of monoclonal antibodies (n=72 including controls) directed against lung cancer antigens was screened immunohistochemically against a panel of seven human lung cancer cell lines (including small cell carcinoma, squamous cell carcinoma, adenocarcinoma and mesothelioma), six human breast cancer cell lines and one human colon cancer cell line, The majority of the antibodies (n=42) reacted also with antigens present on breast and colon cancer cell lines, This cross reactivity especially between lung and breast cancer cell lines is not altogether unexpected since antigens common to breast and lung tissue including their neoplasms such as MUC1 antigen have been described, Our results indicate that epitopes shared by lung and breast cancers are probably more common than previously thought. The relevance for prognosis and therapy of these shared antigens, especially as disease markers in breast cancer, has to be investigated.

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