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Lin TC, Wang KH, Chuang KH, Kao AP, Kuo TC. Oct-4 induces cisplatin resistance and tumor stem cell-like properties in endometrial carcinoma cells. Taiwan J Obstet Gynecol 2023; 62:16-21. [PMID: 36720532 DOI: 10.1016/j.tjog.2022.08.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/08/2022] [Indexed: 01/30/2023] Open
Abstract
OBJECTIVE Research has suggested that tumor-initiating tumor stem cells are derived from normal stem cells and that tumor cells undergo progressive de-differentiation to achieve a stem cell-like state. Tumor stem cells are characterized by high proliferation ability, high plasticity, expression of multi-drug resistance proteins, and the ability to seed new tumors. Octamer-binding transcription factor 4 (Oct-4) and its activation targets are overexpressed in the tumor stem cells of various types of tumors, and this expression is associated with the pathogenesis, development, and poor prognosis of tumors. The primary objective of this study was to test if a stably transfected with Oct-4 gene cell line, RL95-2/Oct-4, has the characteristics of tumor stem cells. MATERIALS AND METHODS Human endometrial carcinoma cells (RL95-2) were transfected with a plasmid carrying genes for Oct-4 and green fluorescent protein (GFP). The stably transfected cells, RL95-2/Oct-4, were selected using G418 and observed to express the GFP reporter gene under the control of the Oct-4 promoter. GFP expression levels of RL95-2/Oct-4 cells were measured using flow cytometry. The proliferation potential of cells was determined according to cumulative population doubling and colony-formation efficiency. Gene expression was analyzed using reverse transcription-polymerase chain reaction. RESULTS RL95-2/Oct-4 cells not only exhibited increased expression of the three most important stem cell genes, Oct-4, Nanog, and Sox2, but also had increased expression of the endometrial tumor stem cell genes CD133 and ALDH1. Furthermore, enhanced expression of these genes in the RL95-2/Oct-4 cells was associated with higher colony-forming ability and growth rate than in parental RL95-2 cells. We also observed that cisplatin induced less cell death in RL95-2/Oct-4 cells than in RL95-2 cells, indicating that RL95-2/Oct-4 cells were more resistant to chemotherapeutic agents. CONCLUSION The study findings contribute to investigate the effects of Oct-4 on tumor stem cell origins.
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Affiliation(s)
- Ta-Chin Lin
- Department of Obstetrics and Gynecology, Kuo General Hospital, Tainan, Taiwan; Center for Reproductive Medicine, Kuo General Hospital, Tainan, Taiwan
| | - Kai-Hung Wang
- Department of Obstetrics and Gynecology, Kuo General Hospital, Tainan, Taiwan; Center for Reproductive Medicine, Kuo General Hospital, Tainan, Taiwan; Department of Laboratory Medicine, Kuo General Hospital, Tainan, Taiwan.
| | - Kuo-Hsiang Chuang
- Graduate Institute of Pharmacognosy, Taipei Medical University, Taipei, Taiwan
| | - An-Pei Kao
- Stemforce Biotechnology Co., Ltd, Chiayi, Taiwan
| | - Tsung-Cheng Kuo
- Department of Obstetrics and Gynecology, Kuo General Hospital, Tainan, Taiwan; Center for Reproductive Medicine, Kuo General Hospital, Tainan, Taiwan
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Liu Y, Liu H, Meng Y, Zhang L. [Research progress of endogenous repair strategy in intervertebral disc]. ZHONGGUO XIU FU CHONG JIAN WAI KE ZA ZHI = ZHONGGUO XIUFU CHONGJIAN WAIKE ZAZHI = CHINESE JOURNAL OF REPARATIVE AND RECONSTRUCTIVE SURGERY 2021; 35:636-641. [PMID: 33998219 DOI: 10.7507/1002-1892.202012070] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Objective To review the research progress of endogenous repair strategy (ERS) in intervertebral disc (IVD). Methods The domestic and foreign literature related to ERS in IVD in recent years was reviewed, and its characteristics, status, and prospect in the future were summarized. Results The key of ERS in IVD is to improve the vitality of stem/progenitor cells in IVD or promote its migration from stem cell Niche to the tissue that need to repair. These stem/progenitor cells in IVD are derived from nucleus pulposus, annulus fibrosus, and cartilaginous endplate, showing similar biological characteristics to mesenchymal stem cells including the expression of the specific stem/progenitor cell surface markers and gene, and also the capacity of multiple differentiations potential. However, the development, senescence, and degeneration of IVD have consumed these stem/progenitor cells, and the harsh internal microenvironment further impair their biological characteristics, which leads to the failure of endogenous repair in IVD. At present, relevant research mainly focuses on improving the biological characteristics of endogenous stem/progenitor cells, directly supplementing endogenous stem/progenitor cells, biomaterials and small molecule compounds to stimulate the endogenous repair in IVD, so as to improve the effect of endogenous repair. Conclusion At present, ERS has gotten some achievements in the treatment of IVD degeneration, but its related studies are still in the pre-clinical stage. So further studies regarding ERS should be carried out in the future, especially in vivo experiments and clinical transformation.
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Affiliation(s)
- Yang Liu
- Department of Orthopedics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P.R.China
| | - Hao Liu
- Department of Orthopedics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P.R.China
| | - Yang Meng
- Department of Orthopedics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P.R.China
| | - Liang Zhang
- Department of Orthopedics, Northern Jiangsu People's Hospital, Yangzhou Jiangsu, 225000, P.R.China
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Lin TC, Wang KH, Chuang KH, Kao AP, Kuo TC. Downregulation of gap junctional intercellular communication and connexin 43 expression by bisphenol A in human granulosa cells. Biotechnol Appl Biochem 2020; 68:676-682. [PMID: 32610363 DOI: 10.1002/bab.1979] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 07/24/2020] [Indexed: 12/12/2022]
Abstract
Gap junctional intercellular communication (GJIC) is the transfer of ions, metabolites, and second messengers between neighboring cells through intercellular junctions. Connexin 43 (Cx43) was found to be the type of gap junction protein responsible for human granulosa cells (GCs) and oocyte communication, which is required for folliculogenesis and oocyte maturation. Bisphenol A (BPA), an estrogenic-like endocrine-disrupting chemical, is one of the most widely produced chemicals around the world. There are reports that the chemical might cause endometrial tumorigenesis and several female reproductive disorders. This study demonstrated that cell culture medium, containing antioxidants (N-acetyl-l-cysteine and l-ascorbic acid-2-phosphate), was able to enhance the survival and self-renewal of GCs. In addition, we found that BPA at environmentally relevant concentration (10-7 M) reduced Cx43 expression and GJIC in GCs through estrogen receptor and mitogen-activated protein kinase pathways. The results of this study not only reveal the reproductive toxicity of BPA but also provide possible mechanisms by which BPA inhibited GJIC in GCs.
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Affiliation(s)
- Ta-Chin Lin
- Department of Obstetrics and Gynecology, Kuo General Hospital, Tainan, Taiwan.,Center for Reproductive Medicine, Kuo General Hospital, Tainan, Taiwan
| | - Kai-Hung Wang
- Department of Obstetrics and Gynecology, Kuo General Hospital, Tainan, Taiwan.,Center for Reproductive Medicine, Kuo General Hospital, Tainan, Taiwan.,Department of Laboratory Medicine, Kuo General Hospital, Tainan, Taiwan
| | - Kuo-Hsiang Chuang
- Graduate Institute of Pharmacognosy, Taipei Medical University, Taipei, Taiwan
| | - An-Pei Kao
- Stemforce Biotechnology Co., Ltd, Chiayi, Taiwan
| | - Tsung-Cheng Kuo
- Department of Obstetrics and Gynecology, Kuo General Hospital, Tainan, Taiwan.,Center for Reproductive Medicine, Kuo General Hospital, Tainan, Taiwan
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Liu Y, Li Y, Nan LP, Wang F, Zhou SF, Feng XM, Liu H, Zhang L. Insights of stem cell-based endogenous repair of intervertebral disc degeneration. World J Stem Cells 2020; 12:266-276. [PMID: 32399135 PMCID: PMC7202923 DOI: 10.4252/wjsc.v12.i4.266] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Revised: 03/26/2020] [Accepted: 04/05/2020] [Indexed: 02/06/2023] Open
Abstract
Low back pain has become more prevalent in recent years, causing enormous economic burden for society and government. Common therapies used in clinics including conservative treatment and surgery can only relieve pain. Subsequent cell-based treatment such as mesenchymal stem cell transplantation poses problems such as short duration of therapeutic effect and tumorigenesis. Recently, the discovery and identification of stem cell niche and stem/progenitor cells in intervertebral disc bring increased attention to endogenous repair strategy. Therefore, we review the studies involving endogenous repair strategy and present the characteristics and current status of this treatment. Meanwhile, we also discuss the strategy and perspective of endogenous repair strategy in future.
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Affiliation(s)
- Yang Liu
- Department of Orthopedics, West China Hospital of Sichuan University, Chengdu 610000, Sichuan Province, China
- Department of Orthopedics, Dalian Medical University, Dalian 116000, Liaoning Province, China
| | - Yan Li
- Department of Oncology, The Affiliated Cancer Hospital, School of Medicine, UESTC, Chengdu 610000, Sichuan Province, China
| | - Li-Ping Nan
- Department of Orthopedics, Dalian Medical University, Dalian 116000, Liaoning Province, China
| | - Feng Wang
- Department of Orthopedics, Dalian Medical University, Dalian 116000, Liaoning Province, China
| | - Shi-Feng Zhou
- Department of Orthopedics, Clinical Medical College of Yangzhou University, Yangzhou 225000, Jiangsu Province, China
| | - Xin-Min Feng
- Department of Orthopedics, Clinical Medical College of Yangzhou University, Yangzhou 225000, Jiangsu Province, China
| | - Hao Liu
- Department of Orthopedics, West China Hospital of Sichuan University, Chengdu 610000, Sichuan Province, China
| | - Liang Zhang
- Department of Orthopedics, Clinical Medical College of Yangzhou University, Yangzhou 225000, Jiangsu Province, China
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Chen TC, Neupane M, Chien SJ, Chuang FR, Crawford RB, Kaminski NE, Chang CC. Characterization of Adult Canine Kidney Epithelial Stem Cells That Give Rise to Dome-Forming Tubular Cells. Stem Cells Dev 2019; 28:1424-1433. [PMID: 31495275 DOI: 10.1089/scd.2019.0049] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Dome formation can occur in cultured tubular epithelial cells originating from various tissues, including the mammary gland and the kidney. The isolation and characterization of normal kidney epithelial stem cells that give rise to dome-forming tubular cells have never been reported. We attempted to isolate and characterize canine kidney epithelial stem cells using a simple cell culture method that we have previously used to isolate other adult human stem cells. Dome-forming kidney epithelial cells were derived from dissociated adult canine kidney tissues that were cultured in a modified keratinocyte serum-free medium supplemented with N-acetyl-l-cysteine, l-ascorbic acid 2-phosphate, nicotinamide, and fetal bovine serum. These cells exhibited high self-renewal capacity in long-term culture (growth for >13 months and 30 cumulative population doublings) and exhibited characteristics of stem cells, including (1) deficiency in gap junctional intercellular communication, (2) anchorage-independent growth, (3) expression of stem cell markers octamer-binding transcription factor 4 and SRY (sex determining region Y)-box 2, (4) expression of cell surface markers CD24 and CD133, and (5) multipotent differentiation into osteoblasts, adipocytes, chondrocytes, and dome-forming tubular cells. Most of these characteristics are shared by the well-known canine renal tubule-derived immortalized Madin-Darby Canine Kidney cell line. Furthermore, the putative canine kidney stem cells developed in this study formed budding tubule-like organoids on Matrigel and required high cell density (>4,000 cells/cm2) for sustained growth and confluency for dome formation. The signal transducer and activator of transcription-3 (STAT3) phosphorylation inhibitor, AG490, inhibited colony-forming efficiency and dome formation, whereas lipopolysaccharide, an activator of STAT3, increased colony-forming efficiency in a dose-dependent manner. These results are consistent with the hypothesis that high cell density induces STAT3 expression, which promotes both stem cell self-renewal and differentiation into tubular cells. Our novel cell culture method should be useful for the future development of normal human kidney stem cells for clinical applications and for studying mechanisms of nephrotoxicity.
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Affiliation(s)
- Te-Chuan Chen
- Division of Nephrology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Manish Neupane
- Department of Medical Oncology, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Shao-Ju Chien
- Division of Cardiology, Department of Pediatrics, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Feng-Rong Chuang
- Division of Nephrology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Robert B Crawford
- Institute for Integrative Toxicology, Michigan State University, East Lansing, Michigan
| | - Norbert E Kaminski
- Institute for Integrative Toxicology, Michigan State University, East Lansing, Michigan
| | - Chia-Cheng Chang
- Department of Pediatrics and Human Development, Michigan State University, East Lansing, Michigan
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Modulation of tumor stem cell characteristics by 17β-estradiol in human mesenchymal stem cells derived from ovarian endometrioma. Taiwan J Obstet Gynecol 2019; 58:338-344. [DOI: 10.1016/j.tjog.2019.03.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/10/2019] [Indexed: 12/11/2022] Open
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Multilineage-differentiating stress-enduring (Muse)-like cells exist in synovial tissue. Regen Ther 2018; 10:17-26. [PMID: 30525067 DOI: 10.1016/j.reth.2018.10.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 09/30/2018] [Accepted: 10/23/2018] [Indexed: 12/17/2022] Open
Abstract
Introduction Cartilage regeneration is a promising therapy for restoring joint function in patients with cartilage defects. The limited availability of autologous chondrocytes or chondrogenic progenitor cells is an obstacle to its clinical application. We investigated the existence and chondrogenic potential of synovial membrane-derived multilineage-differentiating stress-enduring (Muse)-like cells as an alternative cell source for cartilage regeneration. Methods Cells positive for stage-specific embryonic antigen-3 (SSEA-3), a marker of Muse cells, were isolated from the synovial membranes of 6 of 8 patients (median age, 53.5 years; range 36-72 years) by fluorescence-activated cell sorting. SSEA-3-positive cells were cultured in methylcellulose to examine their ability to form Muse clusters that are similar to the embryoid bodies formed by human embryonic stem cells. Muse clusters were expanded and chondrogenic potential of M-cluster-derived MSCs examined using a pellet culture system. Chondrogenic differentiation was evaluated by proteoglycan, safranin O, toluidine blue and type II collagen staining. To evaluate the practicality of the procedure for isolating Muse-like cells, we compared chondrogenic potential of M-cluster derived MSCs with expanded cells derived from the clusters formed by unsorted synovial cells. Results Synovial membranes contained SSEA-3-positive cells that after isolation exhibited Muse-like characteristics such as forming clusters that expressed NANOG, OCT3/4, and SOX2. In the pellet culture system, cell pellets created from the M-cluster-derived MSCs exhibited an increase in wet weight, which implied an increase in extracellular matrix production, displayed metachromasia with toluidine blue and safranin O staining and were aggrecan-positive and type II collagen-positive by immunostaining. Unsorted synovial cells also formed clusters in methylcellulose culture, and the expanded cell population derived from them exhibited chondrogenic potential. The histological and immunohistochemical appearance of chondrogenic pellet created from unsorted synovial cell-derived cells were comparable with that from M-cluster-derived MSCs. Conclusions Muse-like cells can be isolated from the human synovial membrane, even from older patients, and therefore may provide a source of multipotent cells for regenerative medicine. In addition, the cluster-forming cell population within synovial cells also has excellent chondrogenic potential. These cells may provide a more practical option for cartilage regeneration.
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Key Words
- APC, allophycocyanin
- BSA, bovine serum albumin
- Cartilage
- Chondrogenic potential
- DAB, 3,3′-diaminobenzidine
- DAPI, 4′,6-diamidino-2-phenylindole
- FBS, fetal bovine serum
- FITC, fluorescein isothiocyanate
- HRP, horseradish peroxidase
- Ig, immunoglobulin
- M-cluster, cluster cultured from synovial–Muse cells
- MC, methylcellulose
- MSC, mesenchymal stem cell
- Multilineage-differentiating stress-enduring cells
- Muse, multilineage-differentiating stress-enduring cells
- PBS, phosphate-buffered saline
- PE, phycoerythrin
- Regenerative medicine
- SSEA-3, stage-specific embryonic antigen-3
- SY-cluster, cluster cultured from unsorted synovial cells
- Stage-specific embryonic antigens-3
- αMEM, alpha-minimum essential medium
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Lin TC, Wang KH, Kao AP, Chuang KH, Kuo TC. Pueraria mirifica inhibits 17β-estradiol-induced cell proliferation of human endometrial mesenchymal stem cells. Taiwan J Obstet Gynecol 2018; 56:765-769. [PMID: 29241917 DOI: 10.1016/j.tjog.2017.10.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/10/2017] [Indexed: 11/16/2022] Open
Abstract
OBJECTIVE The notion that the human endometrium may contain a population of stem cells has recently been proposed. The mesenchymal stem cells (MSCs) in the endometrium are believed to be responsible for the remarkable regenerative ability of endometrial cells. Estrogens influence the physiological and pathological processes of several hormone-dependent tissues, such as the endometrium. Pueraria mirifica (PM) is a herbal plant that contains several phytoestrogens, including isoflavones, lignans, and coumestans, and is known to exert an estrogenic effect on animal models. The present study investigated the effects of PM on the proliferation of human endometrial MSCs (hEN-MSCs). MATERIALS AND METHODS The hEN-MSCs were isolated from human endometrial tissue. The surface markers of these hEN-MSCs were identified through reverse transcription-polymerase chain reaction analysis. The proliferation potential of hEN-MSCs was measured through a cell proliferation assay. Multilineage differentiation ability was confirmed through Oil red O and von Kossa staining. RESULTS This study demonstrated that 17β-estradiol-responsive MSCs with Oct-4, CD90, and CD105 gene expression can be derived from the human endometrium and that PM exerts biological effects on hEN-MSCs, specifically, enhanced cell growth rate, through the estrogen receptor. Furthermore, PM at 1500 and 2000 μg/mL significantly increased cell proliferation compared with the vehicle control, and PM concentration at 1000 μg/mL significantly inhibited the enhanced cell growth rate induced by 17β-estradiol in hEN-MSCs. CONCLUSION This study provides new insights into the possible biological effects of PM on the proliferation of hEN-MSCs.
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Affiliation(s)
- Ta-Chin Lin
- Department of Obstetrics and Gynecology, Kuo General Hospital, Tainan, Taiwan; Center for Reproductive Medicine, Kuo General Hospital, Tainan, Taiwan
| | - Kai-Hung Wang
- Department of Obstetrics and Gynecology, Kuo General Hospital, Tainan, Taiwan; Center for Reproductive Medicine, Kuo General Hospital, Tainan, Taiwan; Department of Laboratory Medicine, Kuo General Hospital, Tainan, Taiwan.
| | - An-Pei Kao
- Stemforce Biotechnology Co., Ltd, Chiayi, Taiwan
| | - Kuo-Hsiang Chuang
- Graduate Institute of Pharmacognosy, Taipei Medical University, Taipei, Taiwan
| | - Tsung-Cheng Kuo
- Department of Obstetrics and Gynecology, Kuo General Hospital, Tainan, Taiwan; Center for Reproductive Medicine, Kuo General Hospital, Tainan, Taiwan
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Sokol J, Lippert T, Borlongan CV, Stuppia L. Translating amniotic fluid-derived stem cells for transplantation in stroke. Chin Neurosurg J 2016. [DOI: 10.1186/s41016-016-0055-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Lifespan Extension and Sustained Expression of Stem Cell Phenotype of Human Breast Epithelial Stem Cells in a Medium with Antioxidants. Stem Cells Int 2016; 2016:4591310. [PMID: 27807451 PMCID: PMC5078673 DOI: 10.1155/2016/4591310] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 08/30/2016] [Accepted: 09/07/2016] [Indexed: 11/24/2022] Open
Abstract
We have previously reported the isolation and culture of a human breast epithelial cell type with stem cell characteristics (Type I HBEC) from reduction mammoplasty using the MSU-1 medium. Subsequently, we have developed several different normal human adult stem cell types from different tissues using the K-NAC medium. In this study, we determined whether this low calcium K-NAC medium with antioxidants (N-acetyl-L-cysteine and L-ascorbic acid-2-phosphate) is a better medium to grow human breast epithelial cells. The results clearly show that the K-NAC medium is a superior medium for prolonged growth (cumulative population doubling levels ranged from 30 to 40) of normal breast epithelial cells that expressed stem cell phenotypes. The characteristics of these mammary stem cells include deficiency in gap junctional intercellular communication, expression of Oct-4, and the ability to differentiate into basal epithelial cells and to form organoid showing mammary ductal and terminal end bud-like structures. Thus, this new method of growing Type I HBECs will be very useful in future studies of mammary development, breast carcinogenesis, chemoprevention, and cancer therapy.
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Gigantol Suppresses Cancer Stem Cell-Like Phenotypes in Lung Cancer Cells. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2015; 2015:836564. [PMID: 26339272 PMCID: PMC4539074 DOI: 10.1155/2015/836564] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2015] [Revised: 07/16/2015] [Accepted: 07/21/2015] [Indexed: 12/30/2022]
Abstract
As cancer stem cells (CSCs) contribute to malignancy, metastasis, and relapse of cancers, potential of compound in inhibition of CSCs has garnered most attention in the cancer research as well as drug development fields recently. Herein, we have demonstrated for the first time that gigantol, a pure compound isolated from Dendrobium draconis, dramatically suppressed stem-like phenotypes of human lung cancer cells. Gigantol at nontoxic concentrations significantly reduced anchorage-independent growth and survival of the cancer cells. Importantly, gigantol significantly reduced the ability of the cancer cells to form tumor spheroids, a critical hallmark of CSCs. Concomitantly, the treatment of the compound was shown to reduce well-known lung CSCs markers, including CD133 and ALDH1A1. Moreover, we revealed that gigantol decreased stemness in the cancer cells by suppressing the activation of protein kinase B (Akt) signal which in turn decreased the cellular levels of pluripotency and self-renewal factors Oct4 and Nanog. In conclusion, gigantol possesses CSCs suppressing activity which may facilitate the development of this compound for therapeutic approaches by targeting CSCs.
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Elias M, Hoover J, Nguyen H, Reyes S, Lawton C, Borlongan CV. Stroke therapy: the potential of amniotic fluid-derived stem cells. FUTURE NEUROLOGY 2015; 10:321-326. [PMID: 26401122 DOI: 10.2217/fnl.15.19] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Maya Elias
- Department of Neurosurgery & Brain Repair, University of South Florida College of Medicine, 12901 Bruce B Downs Blvd, FL 33612, USA
| | - Jaclyn Hoover
- Department of Neurosurgery & Brain Repair, University of South Florida College of Medicine, 12901 Bruce B Downs Blvd, FL 33612, USA
| | - Hung Nguyen
- Department of Neurosurgery & Brain Repair, University of South Florida College of Medicine, 12901 Bruce B Downs Blvd, FL 33612, USA
| | - Stephanny Reyes
- Department of Neurosurgery & Brain Repair, University of South Florida College of Medicine, 12901 Bruce B Downs Blvd, FL 33612, USA
| | - Christopher Lawton
- Department of Neurosurgery & Brain Repair, University of South Florida College of Medicine, 12901 Bruce B Downs Blvd, FL 33612, USA
| | - Cesar V Borlongan
- Department of Neurosurgery & Brain Repair, University of South Florida College of Medicine, 12901 Bruce B Downs Blvd, FL 33612, USA ; Center of Excellence for Aging & Brain Repair, Department of Neurosurgery & Brain Repair, University of South Florida Morsani College of Medicine, 12901 Bruce B Downs Blvd, Tampa, FL 33612, USA
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