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Lee YT, Tan YJ, Oon CE. BZD9L1 Differentially Regulates Sirtuins in Liver-Derived Cells by Inducing Reactive Oxygen Species. Biomedicines 2023; 11:3059. [PMID: 38002059 PMCID: PMC10669747 DOI: 10.3390/biomedicines11113059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 11/04/2023] [Accepted: 11/06/2023] [Indexed: 11/26/2023] Open
Abstract
Growing evidence has highlighted that mitochondrial dysfunction contributes to drug-induced toxicities and leads to drug attrition and post-market withdrawals. The acetylation or deacetylation of mitochondrial proteins can affect mitochondrial functions as the cells adapt to various cellular stresses and other metabolic challenges. SIRTs act as critical deacetylases in modulating mitochondrial function in response to drug toxicity, oxidative stress, reactive oxygen species (ROS), and energy metabolism. We previously showed that a recently characterised SIRT inhibitor (BZD9L1) is non-toxic in rodents in a short-term toxicity evaluation. However, the impact of BZD9L1 on mitochondrial function is unknown. This work aims to determine the effects of BZD9L1 on mitochondrial function in human normal liver and kidney-derived cell lines using the Agilent Seahorse Cell Mito Stress Test to complement our short-term toxicity evaluations in vivo. The Mito Stress assay revealed that BZD9L1 could potentially trigger oxidative stress by inducing ROS, which promotes proton leak and reduces coupling efficiency in liver-derived THLE cells. However, the same was not observed in human kidney-derived HEK293 cells. Interestingly, BZD9L1 had no impact on SIRT3 protein expression in both cell lines but affected SOD2 and its acetylated form at 72 h in THLE cells, indicating that BZD9L1 exerted its effect through SIRT3 activity rather than protein expression. In contrast, BZD9L1 reduced SIRT1 protein expression and impacted the p53 protein differently in both cell lines. Although BZD9L1 did not affect the spare respiratory capacity in vitro, these findings call for further validation of mitochondrial function through assessment of other mitochondrial parameters to evaluate the safety of BZD9L1.
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Affiliation(s)
| | | | - Chern Ein Oon
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Gelugor 11800, Penang, Malaysia; (Y.T.L.); (Y.J.T.)
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Vijayarathna S, Oon CE, Al-Zahrani M, Abualreesh MH, Chen Y, Kanwar JR, Sahreen S, Ghazanfar S, Adnan M, Sasidharan S. Standardized Polyalthia longifolia leaf extract induces the apoptotic HeLa cells death via microRNA regulation: identification, validation, and therapeutic potential. Front Pharmacol 2023; 14:1198425. [PMID: 37693900 PMCID: PMC10483226 DOI: 10.3389/fphar.2023.1198425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Accepted: 08/02/2023] [Indexed: 09/12/2023] Open
Abstract
Polyalthia longifolia var. angustifolia Thw. (Annonaceae), is a famous traditional medicinal plant in Asia. Ample data specifies that the medicinal plant P. longifolia has anticancer activity; however, the detailed mechanisms of action still need to be well studied. Recent studies have revealed the cytotoxicity potential of P. longifolia leaf against HeLa cells. Therefore, the current study was conducted to examine the regulation of miRNAs in HeLa cancer cells treated with the standardized P. longifolia methanolic leaf extract (PLME). The regulation of miRNAs in HeLa cancer cells treated with the standardized PLME extract was studied through Illumina, Hi-Seq. 2000 platform of Next-Generation Sequencing (NGS) and various in silico bioinformatics tools. The PLME treatment regulated a subset of miRNAs in HeLa cells. Interestingly, the PLME treatment against HeLa cancer cells identified 10 upregulated and 43 downregulated (p < 0.05) miRNAs associated with apoptosis induction. Gene ontology (GO) term analysis indicated that PLME induces cell death in HeLa cells by inducing the pro-apoptotic genes. Moreover, the downregulated oncomiRs modulated by PLME treatment in HeLa cells were identified, targeting apoptosis-related genes through gene ontology and pathway analysis. The LC-ESI-MS/MS analysis identified the presence of Vidarabine and Anandamide compounds that were previously reported to exhibit anticancer activity. The findings of this study obviously linked the cell cytotoxicity effect of PLME treatment against the HeLa cells with regulating various miRNAs expression related to apoptosis induction in the HeLa cells. PLME treatment induced apoptotic HeLa cell death mechanism by regulating multiple miRNAs. The identified miRNAs regulated by PLME may provide further insight into the mechanisms that play a critical role in cervical cancer, as well as novel ideas regarding gene therapeutic strategies.
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Affiliation(s)
- Soundararajan Vijayarathna
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Pulau Pinang, Malaysia
| | - Chern Ein Oon
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Pulau Pinang, Malaysia
| | - Majid Al-Zahrani
- Biological Sciences Department, College of Science and Arts, King Abdulaziz University, Rabigh, Saudi Arabia
| | - Muyassar H. Abualreesh
- Department of Marine Biology, Faculty of Marine Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Yeng Chen
- Department of Oral and Craniofacial Sciences, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
| | - Jagat R. Kanwar
- Department of Biochemistry, All India Institute of Medical Sciences (AIIMS), Bilaspur, India
| | - Sumaira Sahreen
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Pulau Pinang, Malaysia
| | - Shakira Ghazanfar
- National Institute of Genomics and Advanced Biotechnology (NIGAB), National Agriculture Research Centre (NARC), Islamabad, Pakistan
| | - Mohd Adnan
- Department of Biology, College of Science, University of Ha’il, Ha’il, Saudi Arabia
| | - Sreenivasan Sasidharan
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Pulau Pinang, Malaysia
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Oon CE, Subramaniam AV, Ooi LY, Yehya AHS, Lee YT, Kaur G, Sasidharan S, Qiu B, Wang X. BZD9L1 benzimidazole analogue hampers colorectal tumor progression by impeding angiogenesis. World J Gastrointest Oncol 2023; 15:810-827. [PMID: 37275453 PMCID: PMC10237024 DOI: 10.4251/wjgo.v15.i5.810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 02/17/2023] [Accepted: 04/21/2023] [Indexed: 05/12/2023] Open
Abstract
BACKGROUND The development of new vasculatures (angiogenesis) is indispensable in supplying oxygen and nutrients to fuel tumor growth. Epigenetic dysregulation in the tumor vasculature is critical to colorectal cancer (CRC) progression. Sirtuin (SIRT) enzymes are highly expressed in blood vessels. BZD9L1 benzimidazole analogue is a SIRT 1 and 2 inhibitor with reported anticancer activities in CRC. However, its role has yet to be explored in CRC tumor angiogenesis.
AIM To investigate the anti-angiogenic potential of BZD9L1 on endothelial cells (EC) in vitro, ex vivo and in HCT116 CRC xenograft in vivo models.
METHODS EA.hy926 EC were treated with half inhibitory concentration (IC50) (2.5 μM), IC50 (5.0 μM), and double IC50 (10.0 μM) of BZD9L1 and assessed for cell proliferation, adhesion and SIRT 1 and 2 protein expression. Next, 2.5 μM and 5.0 μM of BZD9L1 were employed in downstream in vitro assays, including cell cycle, cell death and sprouting in EC. The effect of BZD9L1 on cell adhesion molecules and SIRT 1 and 2 were assessed via real-time quantitative polymerase chain reaction (qPCR). The growth factors secreted by EC post-treatment were evaluated using the Quantibody Human Angiogenesis Array. Indirect co-culture with HCT116 CRC cells was performed to investigate the impact of growth factors modulated by BZD9L1-treated EC on CRC. The effect of BZD9L1 on sprouting impediment and vessel regression was determined using mouse choroids. HCT116 cells were also injected subcutaneously into nude mice and analyzed for the outcome of BZD9L1 on tumor necrosis, Ki67 protein expression indicative of proliferation, cluster of differentiation 31 (CD31) and CD34 EC markers, and SIRT 1 and 2 genes via hematoxylin and eosin, immunohistochemistry and qPCR, respectively.
RESULTS BZD9L1 impeded EC proliferation, adhesion, and spheroid sprouting through the downregulation of intercellular adhesion molecule 1, vascular endothelial cadherin, integrin-alpha V, SIRT1 and SIRT2 genes. The compound also arrested the cells at G1 phase and induced apoptosis in the EC. In mouse choroids, BZD9L1 inhibited sprouting and regressed sprouting vessels compared to the negative control. Compared to the negative control, the compound also reduced the protein levels of angiogenin, basic fibroblast growth factor, platelet-derived growth factor and placental growth factor, which then inhibited HCT116 CRC spheroid invasion in co-culture. In addition, a significant reduction in CRC tumor growth was noted alongside the downregulation of human SIRT1 (hSIRT1), hSIRT2, CD31, and CD34 EC markers and murine SIRT2 gene, while the murine SIRT1 gene remained unaffected, compared to vehicle control. Histology analyses revealed that BZD9L1 at low (50 mg/kg) and high (250 mg/kg) doses reduced Ki-67 protein expression, while BZD9L1 at the high dose diminished tumor necrosis compared to vehicle control.
CONCLUSION These results highlighted the anti-angiogenic potential of BZD9L1 to reduce CRC tumor progression. Furthermore, together with previous anticancer findings, this study provides valuable insights into the potential of BZD9L1 to co-target CRC tumor vasculatures and cancer cells via SIRT1 and/or SIRT2 down-regulation to improve the therapeutic outcome.
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Affiliation(s)
- Chern Ein Oon
- Institute for Research in Molecular Medicine, Universiti Sains Malaysia, Penang 11800, Malaysia
| | - Ayappa V Subramaniam
- Institute for Research in Molecular Medicine, Universiti Sains Malaysia, Penang 11800, Malaysia
| | - Lik Yang Ooi
- Institute for Research in Molecular Medicine, Universiti Sains Malaysia, Penang 11800, Malaysia
| | - Ashwaq Hamid Salem Yehya
- Cancer Research, Eman Biodiscoveries, Kedah 08000, Malaysia
- Vatche and Tamar Division of Digestive Diseases, Department of Medicine, David Geffen School of Medicine at University of California Los Angeles, Los Angeles, CA 90095, United States
| | - Yeuan Ting Lee
- Institute for Research in Molecular Medicine, Universiti Sains Malaysia, Penang 11800, Malaysia
| | - Gurjeet Kaur
- Institute for Research in Molecular Medicine, Universiti Sains Malaysia, Penang 11800, Malaysia
| | - Sreenivasan Sasidharan
- Institute for Research in Molecular Medicine, Universiti Sains Malaysia, Penang 11800, Malaysia
| | - Beiying Qiu
- Academic Clinical Program, Duke-NUS Medical School, National University of Singapore, Singapore 169857, Singapore
- Singapore National Eye Centre, Singapore Eye Research Institute, Singapore 168751, Singapore
| | - Xiaomeng Wang
- Academic Clinical Program, Duke-NUS Medical School, National University of Singapore, Singapore 169857, Singapore
- Singapore National Eye Centre, Singapore Eye Research Institute, Singapore 169857, Singapore
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Lee YT, Tan YJ, Oon CE. Benzimidazole and its derivatives as cancer therapeutics: The potential role from traditional to precision medicine. Acta Pharm Sin B 2023; 13:478-497. [PMID: 36873180 PMCID: PMC9978992 DOI: 10.1016/j.apsb.2022.09.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 08/11/2022] [Accepted: 09/08/2022] [Indexed: 11/18/2022] Open
Abstract
Cancer is the second leading cause of mortality globally which remains a continuing threat to human health today. Drug insensitivity and resistance are critical hurdles in cancer treatment; therefore, the development of new entities targeting malignant cells is considered a high priority. Targeted therapy is the cornerstone of precision medicine. The synthesis of benzimidazole has garnered the attention of medicinal chemists and biologists due to its remarkable medicinal and pharmacological properties. Benzimidazole has a heterocyclic pharmacophore, which is an essential scaffold in drug and pharmaceutical development. Multiple studies have demonstrated the bioactivities of benzimidazole and its derivatives as potential anticancer therapeutics, either through targeting specific molecules or non-gene-specific strategies. This review provides an update on the mechanism of actions of various benzimidazole derivatives and the structure‒activity relationship from conventional anticancer to precision healthcare and from bench to clinics.
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Yehya AHS, Subramaniam AV, Asif M, Kaur G, Abdul Majid AMS, Oon CE. Anti-tumour activity and toxicological studies of combination treatment of Orthosiphon stamineus and gemcitabine on pancreatic xenograft model. World J Gastroenterol 2022; 28:4620-4634. [PMID: 36157930 PMCID: PMC9476872 DOI: 10.3748/wjg.v28.i32.4620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 04/26/2022] [Accepted: 06/26/2022] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Pancreatic cancer is the most aggressive cancer type. Gemcitabine is the first line chemo-drug used for pancreatic cancer but exerts a broad spectrum of organ toxicities and adverse effects in patients. AIM To evaluate the anti-tumour activity and toxicological effects of Orthosiphon stamineus extract formulation (ID: C5EOSEW5050ESA trademarked as Nuva-staticTM), and gemcitabine combination on pancreatic xenograft model. METHODS Mice were randomly divided into six groups of 6 mice each (n = 6) and given different treatments for 28 d. The study design consisted of a 2 x 3 factorial treatment structure, with gemcitabine (yes/no) by oral (at 1200 and 400 mg/kg per day). Human pancreatic cancer cells were injected subcutaneously into the flanks of athymic nude mice. C5EOSEW5050ESA (200 or 400 mg/kg per day) was administered orally, while gemcitabine (10 mg/kg per 3 d) was given intraperitoneally either alone or in combination treatment. Histopathological analyses of vital organs, tumour tissues, and incidence of lethality were analysed. Analyses of tumour necrosis and proliferation were determined by haematoxylin-eosin staining and immunohistochemistry for Ki-67, respectively. RESULTS No signs of toxicity or damage to vital organs were observed in all treatment groups compared to the untreated group. C5EOSEW5050ESA at 200 mg/kg and gemcitabine combination had no additive antitumor effects compared to a single treatment. Remarkably, a comparably greater response in a reduction in tumour growth, Ki-67 protein expression, and necrosis was demonstrated by 400 mg/kg of C5EOSEW5050ESA and gemcitabine combination than that of the individual agents. CONCLUSION These results highlighted the synergistic activity of C5EOSEW5050ESA with gemcitabine to reduce pancreatic tumour growth in mice compared to a single treatment. Thus, this study provides valuable insights into using C5EOSEW5050ESA as a complementary treatment with gemcitabine for pancreatic cancer.
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Affiliation(s)
- Ashwaq Hamid Salem Yehya
- Institute for Research in Molecular Medicine, Universiti Sains Malaysia, Penang 11800, Malaysia
- Cancer Research, Eman Biodiscoveries, Kedah 08000, Malaysia
| | - Ayappa V Subramaniam
- Institute for Research in Molecular Medicine, Universiti Sains Malaysia, Penang 11800, Malaysia
| | - Muhammad Asif
- Department of Pharmacology, Faculty of Pharmacy, The Islamia University of Bahawalpur, Punjab 63100, Pakistan
| | - Gurjeet Kaur
- Institute for Research in Molecular Medicine, Universiti Sains Malaysia, Penang 11800, Malaysia
| | - Amin M S Abdul Majid
- Department of Cancer Biology and Therapeutics, The John Curtin School of Medical Research, Australia 2601, Australia
| | - Chern Ein Oon
- Institute for Research in Molecular Medicine, Universiti Sains Malaysia, Penang 11800, Malaysia
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Balasubramaniam SD, Balakrishnan V, Oon CE, Kaur G. Gene expression profiling of HPV-associated cervical carcinogenesis in formalin-fixed paraffin-embedded (FFPE) tissues using the NanoString nCounter TM platform. Gene X 2022; 825:146385. [PMID: 35288200 DOI: 10.1016/j.gene.2022.146385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 01/04/2022] [Accepted: 02/28/2022] [Indexed: 11/25/2022] Open
Abstract
Infection by high-risk human papillomavirus (HPV) causes genetic alterations in host cervical cells with consequent changes in gene expression affecting downstream molecular pathways, leading to the development of cervical cancer. In this exploratory study, we aimed to identify the perturbed cellular pathways during the various stages of cervical carcinogenesis. Total RNA was extracted from three formalin-fixed paraffin-embedded (FFPE) samples each of normal cervix, HPV-infected low-grade squamous intraepithelial lesion (LSIL), high-grade SIL (HSIL) and squamous cell carcinoma (SCC). Gene expression profiling was performed using the 770-gene panel from NanoString nCounter® PanCancer Pathways Panel to identify differentially expressed genes (DEGs) and significantly associated pathways in each stage of cervical cancer development. We identified 121 DEGs involved in cervical carcinogenesis. In the transformation from normal cells to LSIL, the MAPK, transcriptional misregulation and JAK-STAT pathways are implicated, while IL1B may promote inflammation and indirectly activates MMP9, resulting in collagen breakdown and cell migration. The cell cycle - apoptosis pathway with upregulation of E2F1 and MCM2, and DNA repair genes BRCA2-BRIP1 and FANCA are crucial during the progression from LSIL to HSIL. In the final stage of progression to SCC, the cell cycle and signaling pathways, as well as upregulation of c-MYC appear essential. In conclusion, archived FFPE-derived tissue samples are a valuable resource for gene expression profiling. The postulated dysregulated pathways and genes provide a guide of the molecular mechanisms that may be involved in the development of HPV-associated cervical cancer, for further investigation and validation studies.
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Affiliation(s)
- Shandra Devi Balasubramaniam
- Institute for Research in Molecular Medicine, Universiti Sains Malaysia, 11800 Minden, Pulau Pinang, Malaysia; Unit of Microbiology, Faculty of Medicine, AIMST University, Semeling, Bedong 8100, Malaysia
| | - Venugopal Balakrishnan
- Institute for Research in Molecular Medicine, Universiti Sains Malaysia, 11800 Minden, Pulau Pinang, Malaysia
| | - Chern Ein Oon
- Institute for Research in Molecular Medicine, Universiti Sains Malaysia, 11800 Minden, Pulau Pinang, Malaysia
| | - Gurjeet Kaur
- Institute for Research in Molecular Medicine, Universiti Sains Malaysia, 11800 Minden, Pulau Pinang, Malaysia.
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Lee YT, Tan YJ, Mok PY, Kaur G, Sreenivasan S, Falasca M, Oon CE. Sex-divergent expression of cytochrome P450 and SIRTUIN 1-7 proteins in toxicity evaluation of a benzimidazole-derived epigenetic modulator in mice. Toxicol Appl Pharmacol 2022; 445:116039. [PMID: 35489524 DOI: 10.1016/j.taap.2022.116039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Revised: 04/21/2022] [Accepted: 04/22/2022] [Indexed: 10/18/2022]
Abstract
Efforts in precision medicine to combat aberrant epigenome have led to the development of epigenetic targeting drugs. We have previously reported the capability of the BZD9L1 epigenetic modulator to impede colorectal tumour growth in vitro and in vivo through sirtuin (SIRT) inhibition. Although most benzimidazole derivatives are commonly less toxic, their effects on SIRTs and cytochrome P450 (CYP) regulations have not been explored alongside toxicity assessments. SIRTs are histone deacetylases that are crucial in maintaining metabolic homeostasis, whereas CYP is essential in drug metabolism. This study aims to determine the toxicology profile of BZD9L1 through oral acute and repeated dose toxicity evaluations, along with molecular analyses of SIRT, CYP and relevant toxicity markers through western blot and quantitative polymerase chain reaction (qPCR). BZD9L1 demonstrated no sign of acute toxicity at the limit dose (2000 mg/kg). The 28-day toxicity study highlighted the tolerability of repeated dose administration without adverse effects. BZD9L1 showed a sex-divergent regulation of hepatic SIRT1-7, CYP2A5 and CYP2D proteins. Furthermore, BZD9L1 did not induce the expression of organ injury proteins or alter the gene expression of cellular function indicators in mouse liver and kidneys, hence demonstrating, at least in part, the safety of BZD9L1 in short-term evaluations. The present study cautions for personalised strategies when employing benzimidazole-derived epigenetic therapeutics.
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Affiliation(s)
- Yeuan Ting Lee
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, 11800 Penang, Malaysia
| | - Yi Jer Tan
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, 11800 Penang, Malaysia
| | - Pei Yi Mok
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, 11800 Penang, Malaysia
| | - Gurjeet Kaur
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, 11800 Penang, Malaysia
| | - Sasidharan Sreenivasan
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, 11800 Penang, Malaysia
| | - Marco Falasca
- Curtin Medical School, Curtin Health Innovation Research Institute (CHIRI), Curtin University, GPO Box U1987, Perth, WA 6845, Australia
| | - Chern Ein Oon
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, 11800 Penang, Malaysia.
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Ramachandran P, Khor BK, Lee CY, Doong RA, Oon CE, Thanh NTK, Lee HL. N-Doped Graphene Quantum Dots/Titanium Dioxide Nanocomposites: A Study of ROS-Forming Mechanisms, Cytotoxicity and Photodynamic Therapy. Biomedicines 2022; 10:biomedicines10020421. [PMID: 35203630 PMCID: PMC8962365 DOI: 10.3390/biomedicines10020421] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 01/07/2022] [Accepted: 01/09/2022] [Indexed: 12/12/2022] Open
Abstract
Titanium dioxide nanoparticles (TiO2 NPs) have been proven to be potential candidates in cancer therapy, particularly photodynamic therapy (PDT). However, the application of TiO2 NPs is limited due to the fast recombination rate of the electron (e−)/hole (h+) pairs attributed to their broader bandgap energy. Thus, surface modification has been explored to shift the absorption edge to a longer wavelength with lower e−/h+ recombination rates, thereby allowing penetration into deep-seated tumors. In this study, TiO2 NPs and N-doped graphene quantum dots (QDs)/titanium dioxide nanocomposites (N-GQDs/TiO2 NCs) were synthesized via microwave-assisted synthesis and the two-pot hydrothermal method, respectively. The synthesized anatase TiO2 NPs were self-doped TiO2 (Ti3+ ions), have a small crystallite size (12.2 nm) and low bandgap energy (2.93 eV). As for the N-GQDs/TiO2 NCs, the shift to a bandgap energy of 1.53 eV was prominent as the titanium (IV) tetraisopropoxide (TTIP) loading increased, while maintaining the anatase tetragonal crystal structure with a crystallite size of 11.2 nm. Besides, the cytotoxicity assay showed that the safe concentrations of the nanomaterials were from 0.01 to 0.5 mg mL−1. Upon the photo-activation of N-GQDs/TiO2 NCs with near-infrared (NIR) light, the nanocomposites generated reactive oxygen species (ROS), mainly singlet oxygen (1O2), which caused more significant cell death in MDA-MB-231 (an epithelial, human breast cancer cells) than in HS27 (human foreskin fibroblast). An increase in the N-GQDs/TiO2 NCs concentrations elevates ROS levels, which triggered mitochondria-associated apoptotic cell death in MDA-MB-231 cells. As such, titanium dioxide-based nanocomposite upon photoactivation has a good potential as a photosensitizer in PDT for breast cancer treatment.
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Affiliation(s)
- Pravena Ramachandran
- Nanomaterials Research Group, School of Chemical Sciences, Universiti Sains Malaysia (USM), Gelugor 11800, Penang, Malaysia;
| | - Boon-Keat Khor
- School of Pharmaceutical Sciences, Universiti Sains Malaysia (USM), Gelugor 11800, Penang, Malaysia; (B.-K.K.); (C.Y.L.)
| | - Chong Yew Lee
- School of Pharmaceutical Sciences, Universiti Sains Malaysia (USM), Gelugor 11800, Penang, Malaysia; (B.-K.K.); (C.Y.L.)
| | - Ruey-An Doong
- Institute of Analytical and Environmental Sciences, National Tsing Hua University, Hsinchu 30013, Taiwan;
| | - Chern Ein Oon
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia (USM), Gelugor 11800, Penang, Malaysia;
| | - Nguyen Thi Kim Thanh
- Biophysics Group, Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK
- UCL Healthcare Biomagnetics and Nanomaterials Laboratories, 21 Albemarle Street, London W1S 4BS, UK
- Correspondence: (N.T.K.T.); (H.L.L.)
| | - Hooi Ling Lee
- Nanomaterials Research Group, School of Chemical Sciences, Universiti Sains Malaysia (USM), Gelugor 11800, Penang, Malaysia;
- School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
- Correspondence: (N.T.K.T.); (H.L.L.)
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Chen WK, Oon CE, Kaur G, Sainson RC, Li JL. Downregulation of Manic fringe impedes angiogenesis and cell migration of renal carcinoma. Microvasc Res 2022; 142:104341. [DOI: 10.1016/j.mvr.2022.104341] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 01/14/2022] [Accepted: 02/08/2022] [Indexed: 12/12/2022]
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Tan YJ, Lee YT, Mancera RL, Oon CE. BZD9L1 sirtuin inhibitor: Identification of key molecular targets and their biological functions in HCT 116 colorectal cancer cells. Life Sci 2021; 284:119747. [PMID: 34171380 DOI: 10.1016/j.lfs.2021.119747] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 05/22/2021] [Accepted: 06/11/2021] [Indexed: 02/07/2023]
Abstract
BZD9L1 was previously described as a SIRT1/2 inhibitor with anti-cancer activities in colorectal cancer (CRC), either as a standalone chemotherapy or in combination with 5-fluorouracil. BZD9L1 was reported to induce apoptosis in CRC cells; however, the network of intracellular pathways and crosstalk between molecular players mediated by BZD9L1 is not fully understood. This study aimed to uncover the mechanisms involved in BZD9L1-mediated cytotoxicity based on previous and new findings for the prediction and identification of related pathways and key molecular players. BZD9L1-regulated candidate targets (RCTs) were identified using a range of molecular, cell-based and biochemical techniques on the HCT 116 cell line. BZD9L1 regulated major cancer pathways including Notch, p53, cell cycle, NFκB, Myc/MAX, and MAPK/ERK signalling pathways. BZD9L1 also induced reactive oxygen species (ROS), regulated apoptosis-related proteins, and altered cell polarity and adhesion profiles. In silico analyses revealed that most RCTs were interconnected, and were involved in the modulation of catalytic activity, metabolism and transcription regulation, response to cytokines, and apoptosis signalling pathways. These RCTs were implicated in p53-dependent apoptosis pathway. This study provides the first assessment of possible associations of molecular players underlying the cytotoxic activity of BZD9L1, and establishes the links between RCTs and apoptosis through the p53 pathway.
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Affiliation(s)
- Yi Jer Tan
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Penang 11800, Malaysia; Curtin Medical School, Curtin Health Innovation Research Institute (CHIRI) and Curtin Institute for Computation, Curtin University, GPO Box U1987, Perth, WA 6845, Australia
| | - Yeuan Ting Lee
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Penang 11800, Malaysia
| | - Ricardo L Mancera
- Curtin Medical School, Curtin Health Innovation Research Institute (CHIRI) and Curtin Institute for Computation, Curtin University, GPO Box U1987, Perth, WA 6845, Australia.
| | - Chern Ein Oon
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Penang 11800, Malaysia.
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Lee YT, Tan YJ, Falasca M, Oon CE. Cancer-Associated Fibroblasts: Epigenetic Regulation and Therapeutic Intervention in Breast Cancer. Cancers (Basel) 2020; 12:E2949. [PMID: 33066013 PMCID: PMC7600259 DOI: 10.3390/cancers12102949] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 09/24/2020] [Accepted: 09/30/2020] [Indexed: 02/06/2023] Open
Abstract
Breast cancer is the leading cause of cancer-related mortality in women worldwide. Cancer-associated fibroblasts (CAFs) are a heterogeneous population of cells in the solid tumour microenvironment. These cells are positively linked to breast cancer progression. Breast CAFs can be categorised into distinct subtypes according to their roles in breast carcinogenesis. Epigenetic modifications change gene expression patterns as a consequence of altered chromatin configuration and DNA accessibility to transcriptional machinery, without affecting the primary structure of DNA. Epigenetic dysregulation in breast CAFs may enhance breast cancer cell survival and ultimately lead to therapeutic resistance. A growing body of evidence has described epigenetic modulators that target histones, DNA, and miRNA as a promising approach to treat cancer. This review aims to summarise the current findings on the mechanisms involved in the epigenetic regulation in breast CAFs and discusses the potential therapeutic strategies via targeting these factors.
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Affiliation(s)
- Yeuan Ting Lee
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Penang 11800, Malaysia; (Y.T.L.); (Y.J.T.)
| | - Yi Jer Tan
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Penang 11800, Malaysia; (Y.T.L.); (Y.J.T.)
| | - Marco Falasca
- Metabolic Signalling Group, School of Pharmacy and Biomedical Sciences, Curtin Health Innovation Research Institute, Curtin University, Perth, WA 6102, Australia
| | - Chern Ein Oon
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Penang 11800, Malaysia; (Y.T.L.); (Y.J.T.)
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12
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Al-Dulaimi DW, Shah Abdul Majid A, M Baharetha H, Ahamed MBK, Faisal SF, Al Zarzour RH, Ein Oon C, Abdul Majid AMS, Ahmed Hassan LE. Anticlastogenic, antimutagenic, and cytoprotective properties of Orthosiphon stamineus ethanolic leaves extract. Drug Chem Toxicol 2020; 45:641-650. [PMID: 32321321 DOI: 10.1080/01480545.2020.1749652] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Orthosiphon stamineus (O.S) is widely consumed for its medidcinal value including anti-inflammatory, anti-infective, and diuretic properties. The present study evaluates the cytoprotective, anti-mutagenic, and anticlastogenic efficacies of standardized extract of Orthosiphon stamineus. Normal liver cell line (WRL68) exposed to hydrogen peroxide and serum-deprived media as insults to evaluate cytoprotective and glutathione activation activities of (Et. O. s). Salmonella typhimurium TA98 and TA100 exposed to different concentrations of (Et. O. s). The influence of Et. O. s on mitotic, replicative indices as well as chromosomal aberration (CA) and sister chromatid exchange (SCE) induced in human peripheral blood lymphocytes by mitomycin C (MMC). The Et. O.s proved to be a potent scavenger for hydrogen peroxide and other free radicals in serum-depraved media, which showed to stimulate glutathione production in liver cells line. Moreover, it did not induce mutations in S. typhimurium subspecies TA98 and TA100. The standardized extract exhibited powerful antimutagenic activities as verified against both 2-nitrofluorene and sodium azide in S. typhimurium TA98 and TA100 cells, respectively. Cytogenetic tests showed high concentrations of Et. O. s to reduce the values of mitotic and replicative indices without any accompanying side effects, such as chromosomal abnormalities or SCE. To ameliorate MMC effects, pretreatment with the extract proofed to be efficient protocol. These data suggests that O. stamineus extract could be useful as cytoprotective, antimutagenic, and anticlastogenic efficacies, which owes to its potent chemoprevention, antioxidant, and glutathione activation properties.
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Affiliation(s)
- Dhamraa W Al-Dulaimi
- College of Health and Medical Technology, Middle Technical University, Baghdad, Iraq.,EMAN Laboratory, Department of Pharmacology, School of Pharmaceutical Sciences, Universti Sains Malaysia, Penang, Malaysia
| | | | - Hussein M Baharetha
- College of Medicine and Medical Science, Hadhramout University, Mukalla, Yemen
| | - Mohamed B Khadeer Ahamed
- EMAN Laboratory, Department of Pharmacology, School of Pharmaceutical Sciences, Universti Sains Malaysia, Penang, Malaysia
| | - Sarah Furqan Faisal
- EMAN Laboratory, Department of Pharmacology, School of Pharmaceutical Sciences, Universti Sains Malaysia, Penang, Malaysia
| | - Raghdaa Hamdan Al Zarzour
- EMAN Laboratory, Department of Pharmacology, School of Pharmaceutical Sciences, Universti Sains Malaysia, Penang, Malaysia
| | - Chern Ein Oon
- Institute for Research in Molecular Medicine (INFORMM), Universti Sains Malaysia, Penang, Malaysia
| | - Amin Malik Shah Abdul Majid
- EMAN Laboratory, Department of Pharmacology, School of Pharmaceutical Sciences, Universti Sains Malaysia, Penang, Malaysia.,ACRF Department of Cancer Biology and Therapeutics, The John Curtin School of Medical Research Australian National University
| | - Loiy E Ahmed Hassan
- EMAN Laboratory, Department of Pharmacology, School of Pharmaceutical Sciences, Universti Sains Malaysia, Penang, Malaysia
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13
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Ramachandran P, Lee CY, Doong RA, Oon CE, Kim Thanh NT, Lee HL. A titanium dioxide/nitrogen-doped graphene quantum dot nanocomposite to mitigate cytotoxicity: synthesis, characterisation, and cell viability evaluation. RSC Adv 2020; 10:21795-21805. [PMID: 35516620 PMCID: PMC9054499 DOI: 10.1039/d0ra02907f] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 06/01/2020] [Indexed: 12/25/2022] Open
Abstract
Titanium dioxide nanoparticles (TiO2 NPs) have attracted tremendous interest owing to their unique physicochemical properties. However, the cytotoxic effect of TiO2 NPs remains an obstacle for their wide-scale applications, particularly in drug delivery systems and cancer therapies. In this study, the more biocompatible nitrogen-doped graphene quantum dots (N-GQDs) were successfully incorporated onto the surface of the TiO2 NPs resulting in a N-GQDs/TiO2 nanocomposites (NCs). The effects of the nanocomposite on the viability of the breast cancer cell line (MDA-MB-231) was evaluated. The N-GQDs and N-GQDs/TiO2 NCs were synthesised using a one- and two-pot hydrothermal method, respectively while the TiO2 NPs were fabricated using microwave-assisted synthesis in the aqueous phase. The synthesised compounds were characterised using Fourier transform infrared (FTIR) spectroscopy, high-resolution transmission electron microscopy (HRTEM), field emission scanning electron microscopy (FESEM) and UV-visible spectrophotometry. The cell viability of the MDA-MB-231 cell line was determined using a CellTiter 96® AQueous One Solution Cell Proliferation (MTS) assay. The obtained results indicated that a monodispersed solution of N-GQDs with particle size 4.40 ± 1.5 nm emitted intense blue luminescence in aqueous media. The HRTEM images clearly showed that the TiO2 particles (11.46 ± 2.8 nm) are square shaped. Meanwhile, TiO2 particles were located on the 2D graphene nanosheet surface in N-GQDs/TiO2 NCs (9.16 ± 2.4 nm). N-GQDs and N-GQDs/TiO2 NCs were not toxic to the breast cancer cells at 0.1 mg mL−1 and below. At higher concentrations (0.5 and 1 mg mL−1), the nanocomposite was significantly less cytotoxic compared to the pristine TiO2. In conclusion, this nanocomposite with reduced cytotoxicity warrants further exploration as a new TiO2-based nanomaterial for biomedical applications, especially as an anti-cancer strategy. Cytotoxicity mitigation using titanium dioxide/nitrogen-doped graphene quantum dot nanocomposites.![]()
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Affiliation(s)
- Pravena Ramachandran
- Nanomaterials Research Group
- School of Chemical Sciences
- Universiti Sains Malaysia
- Malaysia
| | - Chong Yew Lee
- School of Pharmaceutical Sciences
- Universiti Sains Malaysia
- Malaysia
| | - Ruey-An Doong
- Institute of Analytical and Environmental Sciences
- National Tsing Hua University
- Hsinchu
- Taiwan
| | - Chern Ein Oon
- Institute for Research in Molecular Medicine (INFORMM)
- Universiti Sains Malaysia
- Malaysia
| | | | - Hooi Ling Lee
- Nanomaterials Research Group
- School of Chemical Sciences
- Universiti Sains Malaysia
- Malaysia
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14
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Kaur G, Balasubramaniam SD, Lee YJ, Balakrishnan V, Oon CE. Minichromosome Maintenance Complex (MCM) Genes Profiling and MCM2 Protein Expression in Cervical Cancer Development. Asian Pac J Cancer Prev 2019; 20:3043-3049. [PMID: 31653153 PMCID: PMC6982666 DOI: 10.31557/apjcp.2019.20.10.3043] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Indexed: 02/06/2023] Open
Abstract
OBJECTIVE Minichromosome maintenance complex (MCM) proteins are essential for the process of DNA replication and cell division. This study aimed to evaluate MCM genes expression profiles and MCM2 protein in HPV-associated cervical carcinogenesis. METHODOLOGY MCM2, 4, 5 and 7 genes expression profiles were evaluated in three cervical tissue samples each of normal cervix, human papillomavirus (HPV)-infected low grade squamous intraepithelial lesion (LSIL), high grade squamous intraepithelial lesion (HSIL) and squamous cell carcinoma (SCC), using Human Transcriptome Array 2.0 and validated by nCounter® PanCancer Pathway NanoString Array. Immunohistochemical expression of MCM2 protein was semi-quantitatively assessed by histoscore in tissue microarrays containing 9 cases of normal cervix, 10 LSIL, 10 HSIL and 42 cases of SCC. RESULTS MCM2, 4, 5 and 7 genes expressions were upregulated with increasing fold change during the progression from LSIL to HSIL and the highest in SCC. MCM2 gene had the highest fold change in SCC compared to normal cervix. Immunohistochemically, MCM2 protein was localised in the nuclei of basal cells of normal cervical epithelium and dysplastic-neoplastic cells of CIN and SCC. There was a significant difference in MCM2 protein expression between the histological groups (P = 0.039), and histoscore was the highest in HSIL compared to normal cervix (P = 0.010). CONCLUSION The upregulation of MCM genes expressions in cervical carcinogenesis reaffirms MCM as a proliferative marker in DNA replication pathway, whereby proliferation of dysplastic and cancer cells become increasingly dysregulated and uncontrolled. A strong expression of MCM2 protein in HSIL may aid as a concatenated screening tool in detecting pre-cancerous cervical lesions.
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Affiliation(s)
- Gurjeet Kaur
- Institute for Research in Molecular Medicine, Universiti Sains Malaysia, 11800 Minden, Pulau Pinang, Malaysia
| | | | - Yung Jen Lee
- Institute for Research in Molecular Medicine, Universiti Sains Malaysia, 11800 Minden, Pulau Pinang, Malaysia
| | - Venugopal Balakrishnan
- Institute for Research in Molecular Medicine, Universiti Sains Malaysia, 11800 Minden, Pulau Pinang, Malaysia
| | - Chern Ein Oon
- Institute for Research in Molecular Medicine, Universiti Sains Malaysia, 11800 Minden, Pulau Pinang, Malaysia
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15
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Tan YJ, Lee YT, Petersen SH, Kaur G, Kono K, Tan SC, Majid AMSA, Oon CE. BZD9L1 sirtuin inhibitor as a potential adjuvant for sensitization of colorectal cancer cells to 5-fluorouracil. Ther Adv Med Oncol 2019; 11:1758835919878977. [PMID: 31632470 PMCID: PMC6767736 DOI: 10.1177/1758835919878977] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Accepted: 09/06/2019] [Indexed: 02/06/2023] Open
Abstract
Background: This study aims to investigate the combination effect of a novel sirtuin
inhibitor (BZD9L1) with 5-fluorouracil (5-FU) and to determine its molecular
mechanism of action in colorectal cancer (CRC). Methods: BZD9L1 and 5-FU either as single treatment or in combination were tested
against CRC cells to evaluate synergism in cytotoxicity, senescence and
formation of micronucleus, cell cycle and apoptosis, as well as the
regulation of related molecular players. The effects of combined treatments
at different doses on stress and apoptosis, migration, invasion and cell
death mechanism were evaluated through two-dimensional and three-dimensional
cultures. In vivo studies include investigation on the
combination effects of BZD9L1 and 5-FU on colorectal tumour xenograft growth
and an evaluation of tumour proliferation and apoptosis using
immunohistochemistry. Results: Combination treatments exerted synergistic reduction on cell viability on HCT
116 cells but not on HT-29 cells. Combined treatments reduced survival,
induced cell cycle arrest, apoptosis, senescence and micronucleation in HCT
116 cells through modulation of multiple responsible molecular players and
apoptosis pathways, with no effect in epithelial mesenchymal transition
(EMT). Combination treatments regulated SIRT1 and SIRT2 protein expression
levels differently and changed SIRT2 protein localization. Combined
treatment reduced growth, migration, invasion and viability of HCT 116
spheroids through apoptosis, when compared with the single treatment. In
addition, combined treatment was found to reduce tumour growth in
vivo through reduction of tumour proliferation and necrosis
compared with the vehicle control group. This highlights the potential
therapeutic effects of BZD9L1 and 5-FU towards CRC. Conclusion: This study may pave the way for use of BZD9L1 as an adjuvant to 5-FU in
improving the therapeutic efficacy for the treatment of colorectal
cancer.
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Affiliation(s)
- Yi Jer Tan
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Penang, Malaysia
| | - Yeuan Ting Lee
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Penang, Malaysia
| | - Sven H Petersen
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore
| | - Gurjeet Kaur
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Penang, Malaysia
| | - Koji Kono
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore
| | - Soo Choon Tan
- USains Biomics Laboratory Testing Services Sdn. Bhd., Universiti Sains Malaysia, Penang, Malaysia
| | - Amin M S Abdul Majid
- EMAN Testing and Research Laboratories, Department of Pharmacology, School of Pharmaceutical Sciences, Universiti Sains Malaysia, Penang, Malaysia
| | - Chern Ein Oon
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Penang, 11800, Malaysia
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16
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V Subramaniam A, Salem Yehya AH, Oon CE. Molecular Basis of Cancer Pain Management: An Updated Review. Medicina (Kaunas) 2019; 55:E584. [PMID: 31547335 PMCID: PMC6780247 DOI: 10.3390/medicina55090584] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 09/05/2019] [Accepted: 09/09/2019] [Indexed: 02/02/2023]
Abstract
Pain can have a significantly negative impact on the quality of life of patients. Therefore, patients may resort to analgesics to relieve the pain. The struggle to manage pain in cancer patients effectively and safely has long been an issue in medicine. Analgesics are the mainstay treatment for pain management as they act through various methods on the peripheral and central pain pathways. However, the variability in the patient genotypes may influence a drug response and adverse drug effects that follow through. This review summarizes the observed effects of analgesics on UDP-glucuronosyl (UGT) 2B7 isoenzyme, cytochrome P450 (CYP) 2D6, μ-opioid receptor μ 1 (OPRM1), efflux transporter P-glycoprotein (P-gp) and ATP-binding cassette B1 ABCB1/multiple drug resistance 1 (MDR1) polymorphisms on the mechanism of action of these drugs in managing pain in cancer. Furthermore, this review article also discusses the responses and adverse effects caused by analgesic drugs in cancer pain management, due to the inter-individual variability in their genomes.
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Affiliation(s)
- Ayappa V Subramaniam
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia (USM), Pulau Pinang 11800, Malaysia.
| | - Ashwaq Hamid Salem Yehya
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia (USM), Pulau Pinang 11800, Malaysia.
| | - Chern Ein Oon
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia (USM), Pulau Pinang 11800, Malaysia.
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17
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Balasubramaniam SD, Balakrishnan V, Oon CE, Kaur G. Key Molecular Events in Cervical Cancer Development. Medicina (Kaunas) 2019; 55:E384. [PMID: 31319555 PMCID: PMC6681523 DOI: 10.3390/medicina55070384] [Citation(s) in RCA: 100] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 07/10/2019] [Accepted: 07/15/2019] [Indexed: 01/04/2023]
Abstract
Cervical cancer is the fourth most common cancer among women. Infection by high-risk human papillomavirus (HPV) is the main aetiology for the development of cervical cancer. Infection by high-risk human papillomavirus (HPV) and the integration of the HPV genome into the host chromosome of cervical epithelial cells are key early events in the neoplastic progression of cervical lesions. The viral oncoproteins, mainly E6 and E7, are responsible for the initial changes in epithelial cells. The viral proteins inactivate two main tumour suppressor proteins, p53, and retinoblastoma (pRb). Inactivation of these host proteins disrupts both the DNA repair mechanisms and apoptosis, leading to rapid cell proliferation. Multiple genes involved in DNA repair, cell proliferation, growth factor activity, angiogenesis, as well as mitogenesis genes become highly expressed in cervical intraepithelial neoplasia (CIN) and cancer. This genomic instability encourages HPV-infected cells to progress towards invasive carcinoma. The key molecular events involved in cervical carcinogenesis will be discussed in this review.
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Affiliation(s)
| | - Venugopal Balakrishnan
- Institute for Research in Molecular Medicine, Universiti Sains Malaysia, 11800 Minden, Pulau Pinang, Malaysia
| | - Chern Ein Oon
- Institute for Research in Molecular Medicine, Universiti Sains Malaysia, 11800 Minden, Pulau Pinang, Malaysia
| | - Gurjeet Kaur
- Institute for Research in Molecular Medicine, Universiti Sains Malaysia, 11800 Minden, Pulau Pinang, Malaysia.
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18
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V Subramaniam A, Yehya AHS, Cheng WK, Wang X, Oon CE. Epigenetics: The master control of endothelial cell fate in cancer. Life Sci 2019; 232:116652. [PMID: 31302197 DOI: 10.1016/j.lfs.2019.116652] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2019] [Revised: 07/10/2019] [Accepted: 07/10/2019] [Indexed: 01/07/2023]
Abstract
The development of new blood vessels from pre-existing vasculature is called angiogenesis. The growth of tumors depends on a network of supplying vessels that provide them with oxygen and nutrients. Pro-angiogenic factors that are secreted by tumors will trigger the sprouting of nearby existing blood vessels towards themselves and therefore researchers have developed targeted therapy towards these pro-angiogenic proteins to inhibit angiogenesis. However, certain pro-angiogenic proteins tend to bypass the inhibition. Thus, instead of targeting these expressed proteins, research towards angiogenesis inhibition had been focused on a deeper scale, epigenetic modifications. Epigenetic regulatory mechanisms are a heritable change in a sequence of stable but reversible gene function modification yet do not affect the DNA primary sequence directly. Methylation of DNA, modification of histone and silencing of micro-RNA (miRNA)-associated gene are currently considered to initiate and sustain epigenetic changes. Recent findings on the subject matter have provided an insight into the mechanism of epigenetic modifications, thus this review aims to present an update on the latest studies.
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Affiliation(s)
- Ayappa V Subramaniam
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, 11800, USM, Pulau Pinang, Malaysia
| | - Ashwaq Hamid Salem Yehya
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, 11800, USM, Pulau Pinang, Malaysia
| | - Wei Kang Cheng
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, 11800, USM, Pulau Pinang, Malaysia.
| | - Xiaomeng Wang
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore 639798, Singapore; Institute of Molecular and Cell Biology, Agency for Science, Technology, and Research (A*STAR), Proteos, Singapore 138632, Singapore; Department of Cell Biology, Institute of Ophthalmology, University College London, Gower Street, London, WC1E 6BT, United Kingdom.
| | - Chern Ein Oon
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, 11800, USM, Pulau Pinang, Malaysia.
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Abstract
Circular RNAs characterize a class of widespread and diverse endogenous RNAs which are non-coding RNAs that are made by back-splicing events and have covalently closed loops with no polyadenylated tails. Various indications specify that circular RNAs (circRNAs) are plentiful in the human transcriptome. However, their participation in biological processes remains mostly undescribed. To date thousands of circRNAs have been revealed in organisms ranging from Drosophila melanogaster to Homo sapiens. Functional studies specify that these transcripts control expression of protein-coding linear transcripts and thus encompass a key component of gene expression regulation. This chapter provide a comprehensive overview on functional validation of circRNAs. Furthermore, we discuss the recent modern methodologies for the functional validation of circRNAs such as RNA interference (RNAi) gene silencing assay, luciferase reporter assays, circRNA gain-of-function investigation via overexpression of circular transcript assay, RT-q-PCR quantification, and other latest applicable assays. The methods described in this chapter are demonstrated on the cellular model.
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Affiliation(s)
- Hisham Alkatib Huda
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Pulau Pinang, Malaysia
| | - Soundararajan Vijayarathna
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Pulau Pinang, Malaysia
| | - Chern Ein Oon
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Pulau Pinang, Malaysia
| | - Yeng Chen
- Faculty of Dentistry, Dental Research & Training Unit, and Oral Cancer Research and Coordinating Centre (OCRCC), University of Malaya, Kuala Lumpur, Malaysia
| | - Jagat R Kanwar
- Faculty of Health, Nanomedicine-Laboratory of Immunology and Molecular Biomedical Research (LIMBR), School of Medicine (SoM), Deakin University, Geelong, VIC, Australia
| | - Mei Li Ng
- Integrative Medicine Cluster, Advanced Medical and Dental Institute (AMDI), Universiti Sains Malaysia, Pulau Pinang, Malaysia
| | - Sreenivasan Sasidharan
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Pulau Pinang, Malaysia.
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20
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Asif M, Yehya AHS, Dahham SS, Mohamed SK, Shafaei A, Ezzat MO, Abdul Majid AS, Oon CE, Abdul Majid AMS. Establishment of in vitro and in vivo anti-colon cancer efficacy of essential oils containing oleo-gum resin extract of Mesua ferrea. Biomed Pharmacother 2018; 109:1620-1629. [PMID: 30551416 DOI: 10.1016/j.biopha.2018.10.127] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 10/21/2018] [Accepted: 10/21/2018] [Indexed: 12/20/2022] Open
Abstract
Proven the great potential of essential oils as anticancer agents, the current study intended to explore molecular mechanisms responsible for in vitro and in vivo anti-colon cancer efficacy of essential oil containing oleo-gum resin extract (RH) of Mesua ferrea. MTT cell viability studies showed that RH had broad spectrum cytotoxic activities. However, it induced more profound growth inhibitory effects towards two human colon cancer cell lines i.e., HCT 116 and LIM1215 with an IC50 values of 17.38 ± 0.92 and 18.86 ± 0.80 μg/mL respectively. RH induced relatively less toxicity in normal human colon fibroblasts i.e., CCD-18co. Cell death studies conducted, revealed that RH induced characteristic morphological and biochemical changes in HCT 116. At protein level it down-regulated expression of multiple pro-survival proteins i.e., survivin, xIAP, HSP27, HSP60 and HSP70 and up-regulated expression of ROS, caspase-3/7 and TRAIL-R2 in HCT 116. Furthermore, significant reduction in invasion, migration and colony formation potential was observed in HCT 116 treated with RH. Chemical characterization by GC-MS and HPLC methods revealed isoledene and elemene as one the major compounds. RH showed potent antitumor activity in xenograft model. Overall, these findings suggest that RH holds a promise to be further studied for cheap anti-colon cancer naturaceutical development.
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Affiliation(s)
- Muhammad Asif
- Faculty of Pharmaceutical Sciences, Government College University, 38000, Faisalabad, Pakistan; EMAN Testing and Research Laboratory, Department of Pharmacology, School of Pharmaceutical Sciences, Universti Sains Malaysia, Penang, 11800, Malaysia.
| | - Ashwaq H S Yehya
- Institute for Research in Molecular Medicine (INFORMM), Universti Sains Malaysia, Penang, 11800, Malaysia
| | - Saad Sabbar Dahham
- Department of Science, Rustaq College of Education, Ministry of Higher Education, 329-Rustaq, Sultanate of Oman, Oman
| | - Shazmin Kithur Mohamed
- EMAN Testing and Research Laboratory, Department of Pharmacology, School of Pharmaceutical Sciences, Universti Sains Malaysia, Penang, 11800, Malaysia
| | - Armaghan Shafaei
- Department of Pharmaceutical Chemistry, School of Pharmaceutical Sciences, Universti Sains Malaysia, Penang, 11800, Malaysia
| | - Mohammed Oday Ezzat
- Department of Chemistry, College of Education for Women, University of Anbar, 31001, Ramadi, Anbar, Iraq
| | - Aman Shah Abdul Majid
- Department of Pharmacology, School of Medical Sciences, Quest International University, Perak, Malaysia
| | - Chern Ein Oon
- Institute for Research in Molecular Medicine (INFORMM), Universti Sains Malaysia, Penang, 11800, Malaysia
| | - Amin Malik Shah Abdul Majid
- EMAN Testing and Research Laboratory, Department of Pharmacology, School of Pharmaceutical Sciences, Universti Sains Malaysia, Penang, 11800, Malaysia; ACRF Department of Cancer Biology and Therapeutics, The John Curtin School of Medical Research, Australian National University, Australia.
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21
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Cheng WK, Oon CE. How glycosylation aids tumor angiogenesis: An updated review. Biomed Pharmacother 2018; 103:1246-1252. [PMID: 29864905 DOI: 10.1016/j.biopha.2018.04.119] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Revised: 04/13/2018] [Accepted: 04/17/2018] [Indexed: 12/11/2022] Open
Abstract
Glycosylation is an enzymatic process in which a carbohydrate is attached to a functional group from another molecule. Glycosylation is a crucial post translational process in protein modification. The tumor microenvironment produces altered glycans that contribute to cancer progression and aggressiveness. Abnormal glycosylation is widely observed in tumor angiogenesis. Despite many attempts to decipher the role of glycosylation in different aspects of cancer, little is known regarding the roles of glycans in angiogenesis. The blood vessels in tumors are often used to transport oxygen and nutrients for tumor progression and metastasis. The crosstalk within the tumor microenvironment can induce angiogenesis by manipulating these glycans to hijack the normal angiogenesis process, thus promoting tumor growth. Abnormal glycosylation has been shown to promote tumor angiogenesis by degrading the extracellular matrix to activate the angiogenic signaling pathways. This review highlights the latest update on how glycosylation can contribute to tumor angiogenesis that may affect treatment outcomes.
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Affiliation(s)
- Wei Kang Cheng
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Penang, 11800, Malaysia.
| | - Chern Ein Oon
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Penang, 11800, Malaysia.
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Yehya AHS, Asif M, Petersen SH, Subramaniam AV, Kono K, Majid AMSA, Oon CE. Angiogenesis: Managing the Culprits behind Tumorigenesis and Metastasis. Medicina (Kaunas) 2018; 54:E8. [PMID: 30344239 PMCID: PMC6037250 DOI: 10.3390/medicina54010008] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2018] [Revised: 03/22/2018] [Accepted: 03/22/2018] [Indexed: 12/14/2022]
Abstract
Deregulated angiogenesis has been identified as a key contributor in a number of pathological conditions including cancer. It is a complex process, which involves highly regulated interaction of multiple signalling molecules. The pro-angiogenic signalling molecule, vascular endothelial growth factor (VEGF) and its cognate receptor 2 (VEGFR-2), which is often highly expressed in majority of human cancers, plays a central role in tumour angiogenesis. Owing to the importance of tumour vasculature in carcinogenesis, tumour blood vessels have emerged as an excellent therapeutic target. The anti-angiogenic therapies have been shown to arrest growth of solid tumours through multiple mechanisms, halting the expansion of tumour vasculature and transient normalization of tumour vasculature which help in the improvement of blood flow resulting in more uniform delivery of cytotoxic agents to the core of tumour mass. This also helps in reduction of hypoxia and interstitial pressure leading to reduced chemotherapy resistance and more uniform delivery of cytotoxic agents at the targeted site. Thus, complimentary combination of different agents that target multiple molecules in the angiogenic cascade may optimize inhibition of angiogenesis and improve clinical benefit in the cancer patients. This review provides an update on the current trend in exploitation of angiogenesis pathways as a strategy in the treatment of cancer.
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Affiliation(s)
- Ashwaq Hamid Salem Yehya
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Penang 11800, Malaysia.
| | - Muhammad Asif
- Faculty of Pharmaceutical Sciences, Government College University, Faisalabad 38000, Pakistan.
| | - Sven Hans Petersen
- Cancer Science Institute of Singapore, National University of Singapore, Singapore 117543, Singapore.
| | - Ayappa V Subramaniam
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Penang 11800, Malaysia.
| | - Koji Kono
- Cancer Science Institute of Singapore, National University of Singapore, Singapore 117543, Singapore.
- Department of Surgery, National University of Singapore, Singapore 117543, Singapore.
- School of Medicine, Fukushima Medical University, Fukushima 960-1295, Japan.
| | - Amin Malik Shah Abdul Majid
- EMAN Testing and Research Laboratories, Department of Pharmacology, School of Pharmaceutical Sciences, Universiti Sains Malaysia, Penang 11800, Malaysia.
- ACRF Department of Cancer Biology and Therapeutics, The John Curtin School of Medical Research, Australian National University, Acton 0200, Australia.
| | - Chern Ein Oon
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Penang 11800, Malaysia.
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Kavitha N, Vijayarathna S, Oon CE, Chen Y, Kanwar JR, Punj V, Sasidharan S. MicroRNA profiling in MDA-MB-231 human breast cancer cell exposed to the Phaleria macrocarpa (Boerl.) fruit ethyl acetate fraction (PMEAF) through IIlumina Hi-Seq technologies and various in silico bioinformatics tools. J Ethnopharmacol 2018; 213:118-131. [PMID: 29154802 DOI: 10.1016/j.jep.2017.11.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2017] [Revised: 11/06/2017] [Accepted: 11/09/2017] [Indexed: 06/07/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Phaleria macrocarpa (Scheff) Boerl, is a famous traditional medicinal plant which exhibited cytotoxicity against various cancerous cells. Traditionally, P. macrocarpa has been used to control cancer, impotency, hemorrhoids, diabetes mellitus, allergies, liver and heart disease, kidney disorders, blood diseases, acne, stroke, migraine, and various skin diseases. AIM OF THE STUDY Recent studies have demonstrated a potent anticancer potential of P. macrocarpa, especially against HeLa cell. The objective of this study was to investigate the regulation of miRNAs on MDA-MB-231 treated with P. macrocarpa ethyl acetate fraction (PMEAF). MATERIALS AND METHODS The regulation of miRNAs on MDA-MB-231 cells treated with PMEAF was studied through IIlumina, Hi-Seq. 2000 platform of Next Generation Sequencing (NGS) and various in silico bioinformatics tools. RESULTS The PMEAF treatment against MDA-MB-231 cells identified 10 upregulated and 10 downregulated miRNAs. A set of 606 target genes of 10 upregulated miRNAs and 517 target genes of 10 downregulated miRNAs were predicted based on computational and validated databases by using miRGate DB Query. Meanwhile, results from DAVID Bioinformatics Resources 6.8 specified the functional annotation of the upregulated miRNAs involvement in cancer pathway by suppressing the oncogenes and downregulating miRNAs by expressing the tumour suppressor genes in the regulation of apoptosis pathway. CONCLUSION In conclusion, the results of this study proved that PMEAF is a promising anticancer agent with high cytotoxicity against MDA-MB-231 breast cancer cells and it induced apoptotic cell death mechanism through the regulation of miRNAs. PMEAF might be the best candidate for developing more potent anticancer drugs or chemo preventive supplements.
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Affiliation(s)
- Nowroji Kavitha
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, USM, 11800 Pulau Pinang, Malaysia
| | - Soundararajan Vijayarathna
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, USM, 11800 Pulau Pinang, Malaysia
| | - Chern Ein Oon
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, USM, 11800 Pulau Pinang, Malaysia
| | - Yeng Chen
- Dental Research & Training Unit, and Oral Cancer Research and Coordinating Centre (OCRCC), Faculty of Dentistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Jagat R Kanwar
- Nanomedicine-Laboratory of Immunology and Molecular Biomedical Research (LIMBR), School of Medicine (SoM), Faculty of Health, Deakin University, Waurn Ponds, Geelong, VIC 3216, Australia
| | - Vasu Punj
- Department of Medicine, Norris Comprehensive Cancer Center, University of Southern California at Los Angeles, Los Angeles, CA 90089, USA
| | - Sreenivasan Sasidharan
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, USM, 11800 Pulau Pinang, Malaysia.
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Yehya AH, Asif M, Tan YJ, Sasidharan S, Abdul Majid AM, Oon CE. Broad spectrum targeting of tumor vasculature by medicinal plants: An updated review. J Herb Med 2017. [DOI: 10.1016/j.hermed.2017.03.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
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Asif M, Shafaei A, Abdul Majid AS, Ezzat MO, Dahham SS, Ahamed MBK, Oon CE, Abdul Majid AMS. Mesua ferrea stem bark extract induces apoptosis and inhibits metastasis in human colorectal carcinoma HCT 116 cells, through modulation of multiple cell signalling pathways. Chin J Nat Med 2017; 15:505-514. [DOI: 10.1016/s1875-5364(17)30076-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2017] [Indexed: 12/12/2022]
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Al-Dualimi DW, Shah Abdul Majid A, Al-Shimary SFF, Al-Saadi AA, Al Zarzour R, Asif M, Ein Oon C, Abdul Majid AMS. 50% Ethanol extract of Orthosiphon stamineus modulates genotoxicity and clastogenicity induced by mitomycin C. Drug Chem Toxicol 2017. [PMID: 28635332 DOI: 10.1080/01480545.2017.1317785] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Herbal products contain a variety of compounds which may be useful in protecting against cellular damage caused by mutagens. Orthosiphon stamineus (O.s) also known as Cat whiskers. The herb has been shown anti-oxidative properties and can modulate key cellular proteins that have cytoprotective effect. The study aimed to evaluate the effects of different doses (250, 500 and 1000 mg kg-1) of 50% ethanol extract of O.s (Et. O.s) on micro-nucleated polychromatic erythrocytes (MNPCE), Polychromatic to normachromatic erythrocytes ratio (PCE/NCE), Mitotic index (MI), and Chromosomal aberration (CA) in Bab/c mice. Moreover, these parameters were used to evaluate the anti-genotoxic and clastogenic potencies of (Et. O.s) against mitomycin c (MMC) that interact with biological molecules and induce genotoxic and clastogenic disorders in non-tumor cells. MMC (4 mg kg-1) was injected intraperitoneally (i.p.) to the mice before and after treatment with three different doses of (Et. O.s). The results indicated that the extract at different doses did not show significant (p ≥ 0.05) differences in (MNPCE), (PCE/NCE) ratios, and (CA) values. The higher doses sowed high (MI) values compared with untreated control group. MMC showed significant increase (p ≤ 0.001) in (MNPCE), (CA) and reduce (PCE/NCE) and (MI) values compared with untreated control group. Treatment with (Et. O.s) at different doses before and after MMC injection showed to modulate MNPCE, PCE/NCE ratios, CA and MI values in mice bone marrow cells suggesting genoprotective potential of this plant extract.
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Affiliation(s)
- Dhamraa Waleed Al-Dualimi
- a Department of Pharmacology, Eman Laboratory, School of Pharmaceutical Sciences , Universiti Sains Malaysia , Penang , Malaysia
| | - Aman Shah Abdul Majid
- b Department of Pharmacology, School of Medical Sciences , Quest International University , Perak , Malaysia
| | - Sarah Furqan Faisal Al-Shimary
- a Department of Pharmacology, Eman Laboratory, School of Pharmaceutical Sciences , Universiti Sains Malaysia , Penang , Malaysia
| | - Amal Aziz Al-Saadi
- c Department of Clinical Analysis , College of Health and Medical Technology , Baghdad , Iraq
| | - Raghdaa Al Zarzour
- d Department of Pharmacology, School of Pharmaceutical Sciences , Universiti Sains Malaysia , Penang , Malaysia
| | - Muhammad Asif
- a Department of Pharmacology, Eman Laboratory, School of Pharmaceutical Sciences , Universiti Sains Malaysia , Penang , Malaysia
| | - Chern Ein Oon
- e Institute for Research in Molecular Medicine (INFORMM) , Universiti Sains Malaysia , Penang , Malaysia
| | - Amin Malik Shah Abdul Majid
- a Department of Pharmacology, Eman Laboratory, School of Pharmaceutical Sciences , Universiti Sains Malaysia , Penang , Malaysia.,f ACRF Department of Cancer Biology and Therapeutics, The John Curtin School of Medical Research , Australian National University , Acton , Australia
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Oon CE, Bridges E, Sheldon H, Sainson RC, Jubb A, Turley H, Leek R, Buffa F, Harris AL, Li JL. Role of Delta-like 4 in Jagged1-induced tumour angiogenesis and tumour growth. Oncotarget 2017; 8:40115-40131. [PMID: 28445154 PMCID: PMC5522274 DOI: 10.18632/oncotarget.16969] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 03/11/2017] [Indexed: 12/20/2022] Open
Abstract
Delta-like 4 (DLL4) and Jagged1 (JAG1) are two key Notch ligands implicated in tumour angiogenesis. They were shown to have opposite effects on mouse retinal and adult regenerative angiogenesis. In tumours, both ligands are upregulated but their relative effects and interactions in tumour biology, particularly in tumour response to therapeutic intervention are unclear. Here we demonstrate that DLL4 and JAG1 displayed equal potency in stimulating Notch target genes in HMEC-1 endothelial cells but had opposing effects on sprouting angiogenesis in vitro. Mouse DLL4 or JAG1 expressed in glioblastoma cells decreased tumour cell proliferation in vitro but promoted tumour growth in vivo. mDLL4-expressing tumours showed fewer but larger vessels whereas mJAG1-tumours produced more vessels. In both tumour types pericyte coverage was decreased but the vessels were more perfused. Both ligands increased tumour resistance towards anti-VEGF therapy but the resistance was higher in mDLL4-tumours versus mJAG1-tumours. However, their sensitivity to the therapy was restored by blocking Notch signalling with dibenzazepine. Importantly, anti-DLL4 antibody blocked the effect of JAG1 on tumour growth and increased vessel branching in vivo. The mechanism behind the differential responsiveness was due to a positive feedback loop for DLL4-Notch signalling, rendering DLL4 more dominant in activating Notch signalling in the tumour microenvironment. We concluded that DLL4 and JAG1 promote tumour growth by modulating tumour angiogenesis via different mechanisms. JAG1 is not antagonistic but utilises DLL4 in tumour angiogenesis. The results suggest that anti-JAG1 therapy should be explored in conjunction with anti-DLL4 treatment in developing anti-Notch therapies in clinics.
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Affiliation(s)
- Chern Ein Oon
- Molecular Oncology Laboratories, Department of Oncology, Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital, Oxford, UK
- Institute for Research in Molecular Medicine, Universiti Sains Malaysia, Penang, Malaysia
| | - Esther Bridges
- Molecular Oncology Laboratories, Department of Oncology, Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital, Oxford, UK
| | - Helen Sheldon
- Molecular Oncology Laboratories, Department of Oncology, Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital, Oxford, UK
| | - Richard C.A. Sainson
- Molecular Oncology Laboratories, Department of Oncology, Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital, Oxford, UK
| | - Adrian Jubb
- Molecular Oncology Laboratories, Department of Oncology, Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital, Oxford, UK
| | - Helen Turley
- Molecular Oncology Laboratories, Department of Oncology, Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital, Oxford, UK
| | - Russell Leek
- Molecular Oncology Laboratories, Department of Oncology, Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital, Oxford, UK
| | - Francesca Buffa
- Molecular Oncology Laboratories, Department of Oncology, Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital, Oxford, UK
| | - Adrian L. Harris
- Molecular Oncology Laboratories, Department of Oncology, Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital, Oxford, UK
| | - Ji-Liang Li
- Molecular Oncology Laboratories, Department of Oncology, Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital, Oxford, UK
- Institute of Translational and Stratified Medicine, Plymouth University Peninsula Schools of Medicine and Dentistry, Plymouth, UK
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Kavitha N, Ein Oon C, Chen Y, Kanwar JR, Sasidharan S. Phaleria macrocarpa (Boerl.) fruit induce G 0/G 1 and G 2/M cell cycle arrest and apoptosis through mitochondria-mediated pathway in MDA-MB-231 human breast cancer cell. J Ethnopharmacol 2017; 201:42-55. [PMID: 28263848 DOI: 10.1016/j.jep.2017.02.041] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2016] [Revised: 02/22/2017] [Accepted: 02/25/2017] [Indexed: 06/06/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Phaleria macrocarpa (Scheff) Boerl, is a well-known folk medicinal plant in Indonesia. Traditionally, P. macrocarpa has been used to control cancer, impotency, hemorrhoids, diabetes mellitus, allergies, liver and hearth disease, kidney disorders, blood diseases, acne, stroke, migraine, and various skin diseases. AIM OF THE STUDY The purpose of this study was to determine the in situ cytotoxicity effect P. macrocarpa fruit ethyl acetate fraction (PMEAF) and the underlying molecular mechanism of cell death. MATERIALS AND METHODS MDA-MB-231 cells were incubated with PMEAF for 24h. Cell cycle and viability were examined using flow cytometry analysis. Apoptosis was determined using the Annexin V assay and also by fluorescence microscopy. Apoptosis protein profiling was detected by RayBio® Human Apoptosis Array. RESULTS The AO/PI staining and flow cytometric analysis of MDA-MB-231 cells treated with PMEAF were showed apoptotic cell death. The cell cycle analysis by flow cytometry analysis revealed that the accumulation of PMEAF treated MDA-MB-231 cells in G0/G1 and G2/M-phase of the cell cycle. Moreover, the PMEAF exert cytotoxicity by increased the ROS production in MDA-MB-231 cells consistently stimulated the loss of mitochondrial membrane potential (∆Ψm) and induced apoptosis cell death by activation of numerous signalling proteins. The results from apoptosis protein profiling array evidenced that PMEAF stimulated the expression of 9 pro-apoptotic proteins (Bax, Bid, caspase 3, caspase 8, cytochrome c, p21, p27, p53 and SMAC) and suppressed the 4 anti-apoptotic proteins (Bcl-2, Bcl-w, XIAP and survivin) in MDA-MB-231 cells. CONCLUSION The results indicated that PMEAF treatment induced apoptosis in MDA-MB-231 cells through intrinsic mitochondrial related pathway with the participation of pro and anti-apoptotic proteins, caspases, G0/G1 and G2/M-phases cell cycle arrest by p53-mediated mechanism.
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Affiliation(s)
- Nowroji Kavitha
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, USM, 11800 Pulau Pinang, Malaysia
| | - Chern Ein Oon
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, USM, 11800 Pulau Pinang, Malaysia
| | - Yeng Chen
- Dental Research & Training Unit, and Oral Cancer Research and Coordinating Centre (OCRCC), Faculty of Dentistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Jagat R Kanwar
- Nanomedicine-Laboratory of Immunology and Molecular Biomedical Research (LIMBR), School of Medicine (SoM), Faculty of Health, Institute for Frontier Materials (IFM), Deakin University, Waurn Ponds, VIC 3217 Australia
| | - Sreenivasan Sasidharan
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, USM, 11800 Pulau Pinang, Malaysia.
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Tabana YM, Hassan LEA, Ahamed MBK, Dahham SS, Iqbal MA, Saeed MAA, Khan MSS, Sandai D, Majid ASA, Oon CE, Majid AMSA. Scopoletin, an active principle of tree tobacco (Nicotiana glauca) inhibits human tumor vascularization in xenograft models and modulates ERK1, VEGF-A, and FGF-2 in computer model. Microvasc Res 2016; 107:17-33. [PMID: 27133199 DOI: 10.1016/j.mvr.2016.04.009] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Revised: 04/19/2016] [Accepted: 04/24/2016] [Indexed: 11/19/2022]
Abstract
We recently reported the antineovascularization effect of scopoletin on rat aorta and identified its potential anti-angiogenic activity. Scopoletin could be useful as a systemic chemotherapeutic agent against angiogenesis-dependent malignancies if its antitumorigenic activity is investigated and scientifically proven using a suitable human tumor xenograft model. In the present study, bioassay-guided (anti-angiogenesis) phytochemical investigation was conducted on Nicotiana glauca extract which led to the isolation of scopoletin. Further, anti-angiogenic activity of scopoletin was characterized using ex vivo, in vivo and in silico angiogenesis models. Finally, the antitumorigenic efficacy of scopoletin was studied in human colorectal tumor xenograft model using athymic nude mice. For the first time, an in vivo anticancer activity of scopoletin was reported and characterized using xenograft models. Scopoletin caused significant suppression of sprouting of microvessels in rat aortic explants with IC50 (median inhibitory concentration) 0.06μM. Scopoletin (100 and 200mg/kg) strongly inhibited (59.72 and 89.4%, respectively) vascularization in matrigel plugs implanted in nude mice. In the tumor xenograft model, scopoletin showed remarkable inhibition on tumor growth (34.2 and 94.7% at 100 and 200mg/kg, respectively). Tumor histology revealed drastic reduction of the extent of vascularization. Further, immunostaining of CD31 and NG2 receptors in the histological sections confirmed the antivascular effect of scopoletin in tumor vasculature. In computer modeling, scopoletin showed strong ligand affinity and binding energies toward the following angiogenic factors: protein kinase (ERK1), vascular endothelial growth factor A (VEGF-A), and fibroblast growth factor 2 (FGF-2). These results suggest that the antitumor activity of scopoletin may be due to its strong anti-angiogenic effect, which may be mediated by its effective inhibition of ERK1, VEGF-A, and FGF-2.
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Affiliation(s)
- Yasser M Tabana
- EMAN Research and Testing Laboratory, School of Pharmaceutical Sciences, Universiti Sains Malaysia, Minden 11800, Pulau Pinang, Malaysia.
| | - Loiy Elsir A Hassan
- EMAN Research and Testing Laboratory, School of Pharmaceutical Sciences, Universiti Sains Malaysia, Minden 11800, Pulau Pinang, Malaysia
| | - Mohamed B Khadeer Ahamed
- EMAN Biodiscoveries Sdn. Bhd. Suite 126, Level 1, EUREKA Complex, Universiti Sains Malaysia (USM) Campus, Minden 11800, Penang, Malaysia
| | - Saad S Dahham
- EMAN Research and Testing Laboratory, School of Pharmaceutical Sciences, Universiti Sains Malaysia, Minden 11800, Pulau Pinang, Malaysia
| | - Muhammad Adnan Iqbal
- EMAN Biodiscoveries Sdn. Bhd. Suite 126, Level 1, EUREKA Complex, Universiti Sains Malaysia (USM) Campus, Minden 11800, Penang, Malaysia
| | - Mohammed A A Saeed
- Department of Pharmaceutical Chemistry, School of Pharmaceutical Sciences, Universiti Sains Malaysia, Minden 11800, Pulau Pinang, Malaysia
| | - Md Shamsuddin S Khan
- EMAN Research and Testing Laboratory, School of Pharmaceutical Sciences, Universiti Sains Malaysia, Minden 11800, Pulau Pinang, Malaysia
| | - Doblin Sandai
- Infectomics Cluster, Advanced Medical and Dental Institute, Universiti Sains Malaysia, 13200 Bertam, Penang, Malaysia
| | - Aman S Abdul Majid
- Department of Pharmacology, Quest International University, Perak, Malaysia
| | - Chern Ein Oon
- Institute for Research in Molecular Medicine, Universiti Sains Malaysia, Minden 11800, Pulau Pinang, Malaysia
| | - Amin Malik S A Majid
- EMAN Research and Testing Laboratory, School of Pharmaceutical Sciences, Universiti Sains Malaysia, Minden 11800, Pulau Pinang, Malaysia.
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Yoon YK, Oon CE. Sirtuin Inhibitors: An Overview from Medicinal Chemistry Perspective. Anticancer Agents Med Chem 2016; 16:1003-1016. [PMID: 26961318 DOI: 10.2174/1871520616666160310141622] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Revised: 02/16/2015] [Accepted: 02/24/2016] [Indexed: 11/22/2022]
Abstract
The role of sirtuins in age-related diseases is an area of rapidly expanding investigation. Sirtuins are NAD+ -dependent class III histone deacetylases (HDACs) that share extensive homologies with the yeast HDAC Sir2. Class I and class II HDACs inhibitors have been identified as potential anticancer agents and are in clinical studies, but much less is known about class III HDAC inhibitors. However, inhibitors of sirtuins are currently being targeted as potential therapeutic agents for disease such as cancer, neurodegenerative disease and other disorders as sirtuins are discovered to regulate numerous downstream enzymes. Given the link between sirtuins and cancer, understanding the functionality of these enzymes may ultimately have significant impact in cancer prevention or cancer treatment. This review gives an updated overview regarding the regulation of sirtuin enzymes, their implications in cancer, various sirtuin inhibitor scaffolds and their insights in drug design.
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Affiliation(s)
- Yeong Keng Yoon
- Institute for Research in Molecular Medicine, Universiti Sains Malaysia, Minden, 11800, Penang, Malaysia
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Kwan YP, Saito T, Ibrahim D, Al-Hassan FMS, Ein Oon C, Chen Y, Jothy SL, Kanwar JR, Sasidharan S. Evaluation of the cytotoxicity, cell-cycle arrest, and apoptotic induction by Euphorbia hirta in MCF-7 breast cancer cells. Pharm Biol 2016; 54:1223-1236. [PMID: 26154521 DOI: 10.3109/13880209.2015.1064451] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
CONTEXT Euphorbia hirta L. (Euphorbiaceae) has been used as a folk remedy in Southeast Asia for the treatment of various ailments. OBJECTIVE The current study evaluates the cytotoxicity, cell-cycle arrest, and apoptotic induction by E. hirta in MCF-7 breast cancer cells. MATERIALS AND METHODS Cytotoxic activity of methanol extract of whole part of E. hirta was determined by the MTT assay at various concentrations ranging from 1.96 to 250.00 µg/mL in MCF-7 cells. Cell morphology was assessed by light and fluorescence microscopy. Apoptosis and cell-cycle distribution were determined by annexin V staining and flow cytometry. DNA fragmentation, caspase activity, and reactive oxygen species (ROS) assays were performed using the commercially available kits. To identify the cytotoxic fraction, E. hirta extract was subjected to bioassay-guided fractionation. RESULTS Euphorbia hirta exhibited significant inhibition of the survival of MCF-7 cells and the half inhibitory concentration (IC50) values was 25.26 µg/mL at 24 h. Microscopic studies showed that E. hirta-treated cells exhibited marked morphological features characteristic of apoptosis. Euphorbia hirta extract also had an ignorable influence on the LDH leakage and generating intracellular ROS. The flow cytometry study confirmed that E. hirta extract induced apoptosis in MCF-7 cells. Euphorbia hirta also resulted in DNA fragmentation in MCF-7 cells. Moreover, E. hirta treatment resulted in the accumulation of cells at the S and G2/M phases as well as apoptosis. The caspase activity study revealed that E. hirta extract induced apoptosis through the caspase-3-independent pathway by the activation of caspase-2, 6, 8, and 9. Euphorbia hirta hexane fraction, namely HFsub4 fraction, demonstrated highest activity among all the fractions tested with an IC50 value of 10.01 µg/mL at 24 h. DISCUSSION AND CONCLUSION This study revealed that E. hirta induced apoptotic cell death and suggests that E. hirta could be used as an apoptosis-inducing anticancer agent for breast cancer treatment with further detailed studies.
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Affiliation(s)
- Yuet Ping Kwan
- a Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, USM , Penang , Malaysia
| | - Tamio Saito
- b RIKEN-USM Joint Research Unit , RIKEN , Wako , Saitama , Japan
| | - Darah Ibrahim
- c School of Biological Sciences, Universiti Sains Malaysia , Penang , Malaysia
| | | | - Chern Ein Oon
- a Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, USM , Penang , Malaysia
| | - Yeng Chen
- e Faculty of Dentistry , Dental Research & Training Unit, and Oral Cancer Research and Coordinating Centre (OCRCC), University of Malaya , Kuala Lumpur , Malaysia , and
| | - Subramanion L Jothy
- a Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, USM , Penang , Malaysia
| | - Jagat R Kanwar
- f Faculty of Health, Nanomedicine - Laboratory of Immunology and Molecular Biomedical Research (LIMBR) , School of Medicine (SoM), Institute for Frontier Materials (IFM), Deakin University , Waurn Ponds , Victoria , Australia
| | - Sreenivasan Sasidharan
- a Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, USM , Penang , Malaysia
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Asif M, Iqbal MA, Hussein MA, Oon CE, Haque RA, Khadeer Ahamed MB, Abdul Majid AS, Abdul Majid AMS. Human colon cancer targeted pro-apoptotic, anti-metastatic and cytostatic effects of binuclear Silver(I)-N-Heterocyclic carbene (NHC) complexes. Eur J Med Chem 2015; 108:177-187. [PMID: 26649905 DOI: 10.1016/j.ejmech.2015.11.034] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Revised: 11/19/2015] [Accepted: 11/20/2015] [Indexed: 01/12/2023]
Abstract
The current mechanistic study was conducted to explore the effects of increased lipophilicity of binuclear silver(I)-NHC complexes on cytotoxicity. Two new silver(I)-N-Heterocyclic Carbene (NHC) complexes (3 and 4), having lypophilic terminal alkyl chains (Octyl and Decyl), were derived from meta-xylyl linked bis-benzimidazolium salts (1 and 2). Each of the synthesized compounds was characterized by microanalysis and spectroscopic techniques. The complexes were tested for their cytotoxicity against a panel of human cancer c as well normal cell lines using MTT assay. Based on MTT assay results, complex 4 was found to be selectively toxic towards human colorectal carcinoma cell line (HCT 116). Complex 4 was further studied in detail to explore the mechanism of cell death and findings of the study revealed that complex 4 has promising pro-apoptotic and anti-metastatic activities against HCT 116 cells. Furthermore, it showed pronounced cytostatic effects in HCT 116 multicellular spheroid model. Hence, binuclear silver(I)-NHC complexes with longer terminal aliphatic chains have worth to be further studied against human colon cancer for the purpose of drug development.
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Affiliation(s)
- Muhammad Asif
- EMAN Testing and Research Laboratory, School of Pharmaceutical Sciences, Universiti Sains Malaysia, 11800-USM, Penang, Malaysia
| | - Muhammad Adnan Iqbal
- School of Chemical Sciences, Universiti Sains Malaysia, 11800-USM, Penang, Malaysia; Department of Chemistry, University of Agriculture, Faisalabad 38000, Pakistan; Community College, University of Agriculture, Faisalabad 38000, Pakistan
| | - Mouayed A Hussein
- University of Basrah, College of Science, Department of Chemistry, Basra 61004, Iraq
| | - Chern Ein Oon
- Institute for Research in Molecular Medicine, Universiti Sains Malaysia, 11800-USM, Penang, Malaysia
| | - Rosenani A Haque
- School of Chemical Sciences, Universiti Sains Malaysia, 11800-USM, Penang, Malaysia.
| | - Mohamed B Khadeer Ahamed
- EMAN Testing and Research Laboratory, School of Pharmaceutical Sciences, Universiti Sains Malaysia, 11800-USM, Penang, Malaysia
| | - Aman Shah Abdul Majid
- Advanced Medical and Dental Institute, Universiti Sains Malaysia, Penang, 13200, Malaysia
| | - Amin Malik Shah Abdul Majid
- EMAN Testing and Research Laboratory, School of Pharmaceutical Sciences, Universiti Sains Malaysia, 11800-USM, Penang, Malaysia.
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Kavitha N, Vijayarathna S, Jothy SL, Oon CE, Chen Y, Kanwar JR, Sasidharan S. MicroRNAs: biogenesis, roles for carcinogenesis and as potential biomarkers for cancer diagnosis and prognosis. Asian Pac J Cancer Prev 2015; 15:7489-97. [PMID: 25292018 DOI: 10.7314/apjcp.2014.15.18.7489] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
MicroRNAs (miRNAs) are short non-coding RNAs of 20-24 nucleotides that play important roles in carcinogenesis. Accordingly, miRNAs control numerous cancer-relevant biological events such as cell proliferation, cell cycle control, metabolism and apoptosis. In this review, we summarize the current knowledge and concepts concerning the biogenesis of miRNAs, miRNA roles in cancer and their potential as biomarkers for cancer diagnosis and prognosis including the regulation of key cancer-related pathways, such as cell cycle control and miRNA dysregulation. Moreover, microRNA molecules are already receiving the attention of world researchers as therapeutic targets and agents. Therefore, in-depth knowledge of microRNAs has the potential not only to identify their roles in cancer, but also to exploit them as potential biomarkers for cancer diagnosis and identify therapeutic targets for new drug discovery.
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Affiliation(s)
- Nowroji Kavitha
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Penang, Malaysia E-mail :
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Jothy SL, Oon CE, Sasidharan S. Natural pro-oxidants: an alternative remedy to explore as novel cancer therapeutic agents. Asian Pac J Cancer Prev 2014; 15:1501. [PMID: 24606490 DOI: 10.7314/apjcp.2014.15.3.1501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- Subramanion Lachumy Jothy
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Penang, Malaysia E-mail :
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Lachumy SJ, Oon CE, Deivanai S, Saravanan D, Vijayarathna S, Choong YS, Yeng C, Latha LY, Sasidharan S. Herbal Remedies for Combating Irradiation: a Green Anti-irradiation Approach. Asian Pac J Cancer Prev 2013; 14:5553-65. [DOI: 10.7314/apjcp.2013.14.10.5553] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Abstract
The growth of new blood vessels (angiogenesis) is critical for tumor growth and progression. The highly conserved Notch signaling pathway is involved in a variety of cell fate decisions and regulates many cellular biological processes, including angiogenesis. Aberrant Notch signaling has also been implicated in tumorigenesis. Notch ligands and receptors are expressed on many different cell types present within the tumor, including tumor cells and the stromal compartment. This article highlights in particular the various mechanisms by which Notch signaling can mediate tumor angiogenesis. The most studied Notch ligands, Delta-like 4 and Jagged1, competitively regulate tumor angiogenesis. Studies have demonstrated that Delta-like 4 functions as a negative regulator of tumor angiogenesis, whereas Jagged1 promotes angiogenesis. Understanding the implications of Notch signaling in various tumor backgrounds will enable the effects of specific Notch signaling inhibition on tumor angiogenesis and growth to be evaluated as a potential for a novel antiangiogenic therapy in the clinic.
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Affiliation(s)
- Esther Bridges
- Molecular Oncology Laboratories, University Department of Medical Oncology, Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, Headington, Oxford OX3 9DS, UK
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Li JL, Sainson RCA, Oon CE, Turley H, Leek R, Sheldon H, Bridges E, Shi W, Snell C, Bowden ET, Wu H, Chowdhury PS, Russell AJ, Montgomery CP, Poulsom R, Harris AL. DLL4-Notch signaling mediates tumor resistance to anti-VEGF therapy in vivo. Cancer Res 2011; 71:6073-83. [PMID: 21803743 DOI: 10.1158/0008-5472.can-11-1704] [Citation(s) in RCA: 183] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Resistance to VEGF inhibitors is emerging as a major clinical problem. Notch signaling has been implicated in tumor angiogenesis. Therefore, to investigate mechanisms of resistance to angiogenesis inhibitors, we transduced human glioblastoma cells with retroviruses encoding Notch delta-like ligand 4 (DLL4), grew them as tumor xenografts and then treated the murine hosts with the VEGF-A inhibitor bevacizumab. We found that DLL4-mediated tumor resistance to bevacizumab in vivo. The large vessels induced by DLL4-Notch signaling increased tumor blood supply and were insensitive to bevacizumab. However, blockade of Notch signaling by dibenzazepine, a γ-secretase inhibitor, disrupted the large vessels and abolished the tumor resistance. Multiple molecular mechanisms of resistance were shown, including decreased levels of hypoxia-induced VEGF and increased levels of the VEGF receptor VEGFR1 in the tumor stroma, decreased levels of VEGFR2 in large blood vessels, and reduced levels of VEGFR3 overall. DLL4-expressing tumors were also resistant to a VEGFR targeting multikinase inhibitor. We also observed activation of other pathways of tumor resistance driven by DLL4-Notch signaling, including the FGF2-FGFR and EphB4-EprinB2 pathways, the inhibition of which reversed tumor resistance partially. Taken together, our findings show the importance of classifying mechanisms involved in angiogenesis in tumors, and how combination therapy to block DLL4-Notch signaling may enhance the efficacy of VEGF inhibitors, particularly in DLL4-upregulated tumors, and thus provide a rational base for the development of novel strategies to overcome antiangiogenic resistance in the clinic.
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Affiliation(s)
- Ji-Liang Li
- Molecular Oncology Laboratories, Department of Oncology, Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, Oxford, United Kingdom.
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