1
|
Rahimi D, Sharifi R, Jaberie H, Naghibalhossaini F. Antiproliferative and Antitelomerase Effects of Silymarin on Human Colorectal and Hepatocellular Carcinoma Cells. PLANTA MEDICA 2024; 90:298-304. [PMID: 38219733 DOI: 10.1055/a-2244-8788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2024]
Abstract
Silymarin, a widely-used hepatoprotective agent, has shown antitumor properties in both in vitro and animal studies. Currently, there is limited knowledge regarding silymarin's antitelomerase effects on human colorectal cancer and hepatocyte carcinoma cells. In this study, we investigated the antiproliferative and antitelomerase effects of silymarin on four human colorectal cancer and HepG2 hepatocyte carcinoma cell lines. The cell viability and telomerase activity were assessed using MTT and the telomerase repeat amplification protocol assay, respectively. We also investigated the effects of silymarin on the expression of human telomerase reverse transcriptase and its promoter methylation in HepG2 cells by real-time RT-PCR and methylation-specific PCR, respectively. Silymarin treatment inhibited cell proliferation and telomerase activity in all cancer cells. After 24 h of treatment, silymarin exhibited IC50 values ranging from 19 - 56.3 µg/mL against these cancer cells. A 30-min treatment with silymarin at the IC50 concentration effectively inhibited telomerase activity in cell-free extracts of both colorectal cancer and hepatocyte carcinoma cells. Treatment of HepG2 cells with 10 and 30 µg/mL of silymarin for 48 h resulted in a decrease in human telomerase reverse transcriptase expression to 75 and 35% of the level observed in the untreated control (p < 0.01), respectively. Treatment with silymarin (10, 30, and 60 µg/mL) for 48 h did not affect human telomerase reverse transcriptase promoter methylation in HepG2 cells. In conclusion, our findings suggest that silymarin inhibits cancer cell growth by directly inhibiting telomerase activity and downregulating its human telomerase reverse transcriptase catalytic subunit. However, silymarin did not affect human telomerase reverse transcriptase promoter methylation at the concentrations of 10 - 60 µg/mL used in this study.
Collapse
Affiliation(s)
- Daruosh Rahimi
- Department of Biochemistry, Shiraz University of Medical Sciences, School of Medicine, Shiraz, Iran
| | - Roya Sharifi
- Department of Laboratory Sciences, School of Allied Medical Sciences, Iran University of Medical Sciences, Tehran, Iran
| | - Hajar Jaberie
- Department of Biochemistry, Faculty of Medicine, Bushehr University of Medical Sciences, Bushehr, Iran
| | | |
Collapse
|
2
|
Pérez-López FR, Ulloque-Badaracco JR, López-Baena MT, Yuan J, Alarcón-Braga EA, Benites-Zapata VA. Endometrial telomerase activity in women with either endometrial cancer or hyperplasia: A systematic review and meta-analysis. Maturitas 2023; 174:57-66. [PMID: 37295252 DOI: 10.1016/j.maturitas.2023.05.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 04/24/2023] [Accepted: 05/06/2023] [Indexed: 06/12/2023]
Abstract
AIM We performed a systematic review and meta-analysis to assess whether endometrial telomerase activity is associated with endometrial cancer or hyperplasia. METHODS PubMed, Web of Science, Embase, Scielo, LILAC, and CNKI databases were searched to obtain relevant literature for articles published through June 2022, following PRISMA guidelines and a registered PROSPERO protocol. We included observational studies reporting endometrial telomerase activity in patients with either endometrial cancer or hyperplasia compared with benign endometrial tissue (control women). The Newcastle-Ottawa Scale was used to evaluate the quality of studies. Data were expressed as the odds ratios (OR) and 95 % confidence intervals (CI). Random effects and inverse variance methods were used to meta-analyze associations. The I2 test was used to assess heterogeneity. RESULTS There were significant associations between endometrial telomerase activity and either endometrial cancer (20 studies, OR = 10.65, 95 % CI 6.39, 17.75, p = 0.00001, I2 = 21 %) or endometrial hyperplasia (nine studies, OR = 3.62, 95 % CI 1.61, 8.13, p = 0.002, I2 = 36 %) compared to women without endometrial cancer and hyperplasia. There was not a significant difference in telomerase activity in women with endometrial cancer compared to those with endometrial hyperplasia (seven studies, OR = 1.03; 95 % CI 0.31, 3.37, p = 0.96, I2 = 49 %). In subgroup analyses, there were no significant differences in telomerase activity in patients with endometrial cancer by type of observational studies and by countries of the studies. CONCLUSION Endometrial telomerase activity is higher in women with either endometrial cancer or endometrial hyperplasia compared to control women without those lesions.
Collapse
Affiliation(s)
- Faustino R Pérez-López
- University of Zaragoza Faculty of Medicine, Domingo Miral s/n, Zaragoza 50009, Spain; Aragón Health Research Institute, San Juan Bosco 13, Zaragoza 50009, Spain.
| | | | | | - Junhua Yuan
- Special Medicine Department, School of Basic Medicine, Qingdao University, Qingado, China
| | - Esteban A Alarcón-Braga
- Escuela de Medicina, Universidad Peruana de Ciencias Aplicadas, Lima, Peru; Sociedad Científica de Estudiantes de Medicina, Escuela de Medicina, Universidad Peruana de Ciencias Aplicadas, Lima, Peru
| | - Vicente A Benites-Zapata
- Unidad de Investigación para la Generación y Síntesis de Evidencias en Salud, Vicerrectorado de Investigación, Universidad San Ignacio de Loyola, Lima, Peru
| |
Collapse
|
3
|
Tatar M, Bagheri Z, Varedi M, Naghibalhossaini F. Blackberry Extract Inhibits Telomerase Activity in Human Colorectal Cancer Cells. Nutr Cancer 2018; 71:461-471. [DOI: 10.1080/01635581.2018.1506491] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Mohsen Tatar
- Department of Biochemistry, Shiraz University of Medical Sciences, School of Medicine, Shiraz, Iran
| | - Zohreh Bagheri
- Department of Physiology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Masoumeh Varedi
- Department of Physiology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Fakhraddin Naghibalhossaini
- Department of Biochemistry, Shiraz University of Medical Sciences, School of Medicine, Shiraz, Iran
- School of Medicine, Autoimmune Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| |
Collapse
|
4
|
Zhang X, Cheng R, Shi Z, Jin Y. A PCR-free fluorescence strategy for detecting telomerase activity via double amplification strategy. Biosens Bioelectron 2015; 75:101-7. [PMID: 26299822 DOI: 10.1016/j.bios.2015.08.013] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 08/04/2015] [Accepted: 08/08/2015] [Indexed: 01/23/2023]
Abstract
As a universal tumor biomarker, research on the activity and inhibition of telomerase is of great importance for cancer diagnosis and therapy. Although the telomeric repeat amplification protocol (TRAP) has served as a powerful assay for detecting telomerase activity, its application has been significantly limited by amplification related errors and time-consuming procedure. To address the limitations of PCR-based protocol, a dual amplification fluorescence assay was developed for PCR-free detecting telomerase activity. Briefly, we designed an arch-structure DNA probe to specifically control strand displacement reaction and subsequent enzyme-aided amplification. Telomerase substrate (TS) primer was extended by telomerase to form long elongation products which contain several TTAGGG repeat units. So, one elongation product can release more than one trigger DNA (t-DNA) via strand displacement reaction to realize first amplification. Subsequently, t-DNA specifically opened molecular beacon (MB) to restore the fluorescence of MB. Meanwhile, t-DNA was recycled by the aid of nicking endonuclease to continuously open more and more MBs, leading to a second amplification. Owing to the double amplification strategy, the proposed method allowed the measurement of telomerase activity in crude cell extracts equivalent to 5 HeLa cells and 10 CCRF-CEM cells without PCR amplification. Besides, the influence of telomere-binding ligands on the telomerase activity demonstrated that the proposed method holds the potential to evaluate the inhibition efficiency of telomerase inhibitors.
Collapse
Affiliation(s)
- Xiafei Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Rui Cheng
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Zhilu Shi
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Yan Jin
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China.
| |
Collapse
|
5
|
Funayama R, Nakahara Y, Kado S, Tanaka M, Kimura K. A single-molecule force-spectroscopic study on stabilization of G-quadruplex DNA by a telomerase inhibitor. Analyst 2014; 139:4037-43. [DOI: 10.1039/c4an00439f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The stabilization of G-quadruplex DNA by a telomerase inhibitor was semi-quantitatively evaluated by AFM-based SMFS.
Collapse
Affiliation(s)
- Ryoto Funayama
- Department of Applied Chemistry
- Faculty of Systems Engineering
- Wakayama University
- Wakayama 640-8510, Japan
| | - Yoshio Nakahara
- Department of Applied Chemistry
- Faculty of Systems Engineering
- Wakayama University
- Wakayama 640-8510, Japan
| | - Shinpei Kado
- Department of Applied Chemistry
- Faculty of Systems Engineering
- Wakayama University
- Wakayama 640-8510, Japan
| | - Mutsuo Tanaka
- National Institute of Advanced Industrial Science and Technology
- Tsukuba, Japan
| | - Keiichi Kimura
- Department of Applied Chemistry
- Faculty of Systems Engineering
- Wakayama University
- Wakayama 640-8510, Japan
| |
Collapse
|
6
|
Chen L, Huang J, Meng F, Zhou N. Distinguishing tumor cells via analyzing intracellular telomerase activity. ANAL SCI 2010; 26:535-8. [PMID: 20467126 DOI: 10.2116/analsci.26.535] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Two strategies to identify tumor cells were developed in this research via analyzing the activity of telomerase inside the cells, which is regarded as the mark enzyme of tumors. The lysate of cells was used to assay directly. In the electrochemical assay, the substrate of telomerase was incubated with the lysate, followed by PCR amplification of the elongated products. Then the oxidation peak current of guanine that existed in the hydrolyte of PCR products was used as a target to identify tumor cells. In the spectral assay, the lysate of cells was used to catalyze the elongation of the substrate of telomerase modified on the surface of gold nanoparticles. Due to the formation of G-quadruple structures after elongation and subsequent aggregation of gold nanoparticles, the changes in UV-visible spectra can also be utilized to identify tumor cells.
Collapse
Affiliation(s)
- Lin Chen
- Laboratory of Biosensing Technology, School of Life Science, Shanghai University, Shanghai 200444, P. R. China
| | | | | | | |
Collapse
|
7
|
Ding C, Li X, Ge Y, Zhang S. Fluorescence Detection of Telomerase Activity in Cancer Cells Based on Isothermal Circular Strand-Displacement Polymerization Reaction. Anal Chem 2010; 82:2850-5. [DOI: 10.1021/ac902818w] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Caifeng Ding
- Key Laboratory of Eco-chemical Engineering, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Xiangling Li
- Key Laboratory of Eco-chemical Engineering, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Ying Ge
- Key Laboratory of Eco-chemical Engineering, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Shusheng Zhang
- Key Laboratory of Eco-chemical Engineering, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| |
Collapse
|
8
|
Eskiocak U, Ozkan-Ariksoysal D, Ozsoz M, Öktem HA. Label-Free Detection of Telomerase Activity Using Guanine Electrochemical Oxidation Signal. Anal Chem 2007; 79:8807-11. [DOI: 10.1021/ac071014r] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ugur Eskiocak
- Department of Biological Sciences, Middle East Technical University, 06531 Ankara, Turkey, and Department of Analytical Chemistry, Faculty of Pharmacy, Ege Univesity, 35100 Bornova-İzmir, Turkey
| | - Dilsat Ozkan-Ariksoysal
- Department of Biological Sciences, Middle East Technical University, 06531 Ankara, Turkey, and Department of Analytical Chemistry, Faculty of Pharmacy, Ege Univesity, 35100 Bornova-İzmir, Turkey
| | - Mehmet Ozsoz
- Department of Biological Sciences, Middle East Technical University, 06531 Ankara, Turkey, and Department of Analytical Chemistry, Faculty of Pharmacy, Ege Univesity, 35100 Bornova-İzmir, Turkey
| | - Huseyin Avni Öktem
- Department of Biological Sciences, Middle East Technical University, 06531 Ankara, Turkey, and Department of Analytical Chemistry, Faculty of Pharmacy, Ege Univesity, 35100 Bornova-İzmir, Turkey
| |
Collapse
|
9
|
Cheng JY, Hsieh CJ, Chuang YC, Hsieh JR. Performing microchannel temperature cycling reactions using reciprocating reagent shuttling along a radial temperature gradient. Analyst 2005; 130:931-40. [PMID: 15912243 DOI: 10.1039/b501061f] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This study develops a novel temperature cycling strategy for executing temperature cycling reactions in laser-etched poly(methylmethacrylate) (PMMA) microfluidic chips. The developed microfluidic chip is circular in shape and is clamped in contact with a circular ITO heater chip of an equivalent diameter. Both chips are fabricated using an economic and versatile laser scribing process. Using this arrangement, a self-sustained radial temperature gradient is generated within the microfluidic chip without the need to thermally isolate the different temperature zones. This study demonstrates the temperature cycling capabilities of the reported microfluidic device by a polymerase chain reaction (PCR) process using ribulose 1,5-bisphosphate carboxylase large subunit (rbcL) gene as a template. The temperature ramping rate of the sample inside the microchannel is determined from the spectral change of a thermochromic liquid crystal (TLC) solution pumped into the channel. The present results confirm that a rapid thermal cycling effect is achieved despite the low thermal conductivity of the PMMA substrate. Using IR thermometry, it is found that the radial temperature gradient of the chip is approximately 2 degrees C mm(-1). The simple system presented in this study has considerable potential for miniaturizing complex integrated reactions requiring different cycling parameters.
Collapse
Affiliation(s)
- Ji-Yen Cheng
- Research Center for Applied Sciences, 128 Sec. 2 Academia Rd., Taipei 11529, Taiwan.
| | | | | | | |
Collapse
|
10
|
Nemos C, Delage-Mourroux R, Jouvenot M, Adami P. Onset of direct 17-β estradiol effects on proliferation and c-fos expression during oncogenesis of endometrial glandular epithelial cells. Exp Cell Res 2004; 296:109-22. [PMID: 15149842 DOI: 10.1016/j.yexcr.2004.01.028] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2003] [Revised: 01/19/2004] [Indexed: 11/20/2022]
Abstract
In normal endometrial glandular epithelial cells (GEC), 17beta-estradiol (E2) enhances proliferation and c-fos expression only in the presence of growth factors. On the contrary, growth factors are not required for the E2 effects in cancerous cells. Thus, a repression of E2 action could exist in normal cells and be turned off in cancerous cells, allowing a direct estrogen-dependent proliferation. To verify this hypothesis, we established immortalized and transformed cell models, then investigated alterations of E2 effects during oncogenesis. SV40 large T-antigen was used to generate immortalized GEC model (IGEC). After observation of telomerase reactivation, IGEC model was transfected by activated c-Ha-ras to obtain transformed cell lines (TGEC1 and TGEC2). The phenotypic, morphological, and genetic characteristics of these models were determined before studying the E2 effects. In IGEC, the E2 action on proliferation and c-fos expression required the presence of growth factors, as observed in GECs. In TGECs, this action arose in the absence of growth factors. After IGEC transformation, the activation of ras pathway would substitute the priming events required for the release of repression in GEC and IGEC and thus permit direct E2 effects. Our cell models are particularly suitable to investigate alterations of gene regulation by E2 during oncogenesis.
Collapse
Affiliation(s)
- Christophe Nemos
- Laboratoire de Biochimie Biologie Moléculaire, Université de Franche-Comté, U.F.R. Sciences et Techniques, Besançon, France
| | | | | | | |
Collapse
|