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Bao Y, Wang S, Gao Y, Zhang W, Jin H, Yang Y, Li J. MicroRNA-126 accelerates IgE-mediated mast cell degranulation associated with the PI3K/Akt signaling pathway by promoting Ca 2+ influx. Exp Ther Med 2018; 16:2763-2769. [PMID: 30186504 DOI: 10.3892/etm.2018.6510] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Accepted: 06/15/2018] [Indexed: 12/26/2022] Open
Abstract
Mast cells (MCs) have been reported to serve a crucial role in allergic diseases, including asthma, allergic rhinitis and anaphylaxis. A previous study revealed that microRNA-126 (miR-126) was associated with airway hyperresponsiveness induced by house dust mites, however the molecular mechanisms were unclear. The present study aimed to investigate the effect of miR-126 on immunoglobulin E (IgE)-regulated MC degranulation and explore its underlying mechanisms. miR-126 expression was quantified using a rat model in vivo and in rat peritoneal mast cells (RPMCs) in vitro. Overexpression or downregulation of miR-126 was established by transfection with miR-126 mimics or miR-126 inhibitors and MC degranulation was subsequently evaluated. The effect of miR-126 on protein kinase B (Akt) and phosphorylated Akt protein expression was examined by western blot analysis. The phosphoinositide 3-kinase (PI3K) inhibitor (LY294002) was used to determine the role of the PI3K/Akt signaling pathway. In addition, cytosolic calcium (Ca2+) levels were measured by a fura-2 assay. The results demonstrated that miR-126 expression was upregulated in the ear tissues of rats with allergic contact dermatitis and IgE-activated MCs. The overexpression of miR-126 in RPMCs was established following miR-126 mimic transfection. The release of β-hexosaminidase and histamine, markers of MC degranulation, were significantly increased in cells with miR-126 overexpression. The phosphorylation of Akt was significantly increased following transfection with miR-126 mimics in stimulated cells, however the signaling activation was abrogated by LY294002. In addition, Ca2+ influx was significantly promoted in stimulated RPMCs overexpressing miR-126. These results indicate that miR-126 accelerated IgE-mediated MC degranulation associated with the PI3K/Akt signaling pathway by promoting Ca2+ influx. This suggests that miR-126 may be a promising therapeutic target for the treatment of allergic skin diseases.
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Affiliation(s)
- Yuan Bao
- Department of Network Medicine, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430014, P.R. China
| | - Song Wang
- Department of Massage, Wuhan Hospital of Traditional Chinese Medicine, Wuhan, Hubei 430014, P.R. China
| | - Yang Gao
- Department of Massage, Wuhan Hospital of Traditional Chinese Medicine, Wuhan, Hubei 430014, P.R. China
| | - Wen Zhang
- Department of Encephalopathy (I), Wuhan Hospital of Traditional Chinese Medicine, Wuhan, Hubei 430014, P.R. China
| | - Haitao Jin
- Department of Encephalopathy (II), Wuhan Hospital of Traditional Chinese Medicine, Wuhan, Hubei 430014, P.R. China
| | - Yang Yang
- Department of Network Medicine, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430014, P.R. China
| | - Jiangyu Li
- Department of Gerontology, Wuhan Hospital of Traditional Chinese Medicine, Wuhan, Hubei 430014, P.R. China
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652
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González-González A, Muñoz-Muela E, Marchal JA, Cara FE, Molina MP, Cruz-Lozano M, Jiménez G, Verma A, Ramírez A, Qian W, Chen W, Kozielski AJ, Elemento O, Martín-Salvago MD, Luque RJ, Rosa-Garrido C, Landeira D, Quintana-Romero M, Rosato RR, García MA, Ramirez-Tortosa CL, Kim H, Rodriguez-Aguayo C, Lopez-Berestein G, Sood AK, Lorente JA, Sánchez-Rovira P, Chang JC, Granados-Principal S. Activating Transcription Factor 4 Modulates TGFβ-Induced Aggressiveness in Triple-Negative Breast Cancer via SMAD2/3/4 and mTORC2 Signaling. Clin Cancer Res 2018; 24:5697-5709. [PMID: 30012564 DOI: 10.1158/1078-0432.ccr-17-3125] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 04/30/2018] [Accepted: 07/11/2018] [Indexed: 11/16/2022]
Abstract
Purpose: On the basis of the identified stress-independent cellular functions of activating transcription factor 4 (ATF4), we reported enhanced ATF4 levels in MCF10A cells treated with TGFβ1. ATF4 is overexpressed in patients with triple-negative breast cancer (TNBC), but its impact on patient survival and the underlying mechanisms remain unknown. We aimed to determine ATF4 effects on patients with breast cancer survival and TNBC aggressiveness, and the relationships between TGFβ and ATF4. Defining the signaling pathways may help us identify a cell signaling-tailored gene signature.Experimental Design: Patient survival data were determined by Kaplan-Meier analysis. Relationship between TGFβ and ATF4, their effects on aggressiveness (tumor proliferation, metastasis, and stemness), and the underlying pathways were analyzed in three TNBC cell lines and in vivo using patient-derived xenografts (PDX).Results: ATF4 overexpression correlated with TNBC patient survival decrease and a SMAD-dependent crosstalk between ATF4 and TGFβ was identified. ATF4 expression inhibition reduced migration, invasiveness, mammosphere-forming efficiency, proliferation, epithelial-mesenchymal transition, and antiapoptotic and stemness marker levels. In PDX models, ATF4 silencing decreased metastases, tumor growth, and relapse after chemotherapy. ATF4 was shown to be active downstream of SMAD2/3/4 and mTORC2, regulating TGFβ/SMAD and mTOR/RAC1-RHOA pathways independently of stress. We defined an eight-gene signature with prognostic potential, altered in 45% of 2,509 patients with breast cancer.Conclusions: ATF4 may represent a valuable prognostic biomarker and therapeutic target in patients with TNBC, and we identified a cell signaling pathway-based gene signature that may contribute to the development of combinatorial targeted therapies for breast cancer. Clin Cancer Res; 24(22); 5697-709. ©2018 AACR.
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Affiliation(s)
- Adrián González-González
- UGC de Oncología Médica, Complejo Hospitalario de Jaén, Jaén, Spain.,GENYO, Centre for Genomics and Oncological Research, Granada, Spain
| | - Esperanza Muñoz-Muela
- UGC de Oncología Médica, Complejo Hospitalario de Jaén, Jaén, Spain.,GENYO, Centre for Genomics and Oncological Research, Granada, Spain
| | - Juan A Marchal
- Instituto de Investigación Biosanitaria de Granada (ibs.GRANADA), Universidad de Granada, Granada, Spain.,Biopathology and Regenerative Medicine Institute (IBIMER), Centre for Biomedical Research (CIBM), University of Granada, Granada, Spain
| | - Francisca E Cara
- UGC de Oncología Médica, Complejo Hospitalario de Jaén, Jaén, Spain.,GENYO, Centre for Genomics and Oncological Research, Granada, Spain
| | - Maria P Molina
- UGC de Oncología Médica, Complejo Hospitalario de Jaén, Jaén, Spain.,GENYO, Centre for Genomics and Oncological Research, Granada, Spain
| | - Marina Cruz-Lozano
- UGC de Oncología Médica, Complejo Hospitalario de Jaén, Jaén, Spain.,GENYO, Centre for Genomics and Oncological Research, Granada, Spain
| | - Gema Jiménez
- Instituto de Investigación Biosanitaria de Granada (ibs.GRANADA), Universidad de Granada, Granada, Spain.,Biopathology and Regenerative Medicine Institute (IBIMER), Centre for Biomedical Research (CIBM), University of Granada, Granada, Spain
| | - Akanksha Verma
- Institute for Computational Biomedicine, Weill Cornell Medical College, New York, New York
| | - Alberto Ramírez
- Houston Methodist Cancer Center, Houston Methodist Hospital, Houston, Texas
| | - Wei Qian
- Institute for Computational Biomedicine, Weill Cornell Medical College, New York, New York
| | - Wen Chen
- Houston Methodist Cancer Center, Houston Methodist Hospital, Houston, Texas
| | | | - Olivier Elemento
- Institute for Computational Biomedicine, Weill Cornell Medical College, New York, New York
| | | | - Rafael J Luque
- UGC de Anatomía Patológica, Complejo Hospitalario de Jaén, Jaén, Spain
| | - Carmen Rosa-Garrido
- FIBAO. Complejo Hospitalario de Jaén, Servicio Andaluz de Salud, Jaén, Spain
| | - David Landeira
- GENYO, Centre for Genomics and Oncological Research, Granada, Spain.,Department of Biochemistry and Molecular Biology II, Faculty of Pharmacy, University of Granada, Granada, Spain
| | - María Quintana-Romero
- GENYO, Centre for Genomics and Oncological Research, Granada, Spain.,Department of Biochemistry and Molecular Biology II, Faculty of Pharmacy, University of Granada, Granada, Spain
| | - Roberto R Rosato
- Houston Methodist Cancer Center, Houston Methodist Hospital, Houston, Texas
| | - Maria A García
- Department of Oncology, Virgen de las Nieves University Hospital, Granada, Spain
| | | | - Hanna Kim
- Texas Tech University Health Sciences Center, School of Pharmacy, Amarillo, Texas
| | - Cristian Rodriguez-Aguayo
- Center for RNA Interference and Non-Coding RNA, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Gabriel Lopez-Berestein
- Center for RNA Interference and Non-Coding RNA, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Anil K Sood
- Center for RNA Interference and Non-Coding RNA, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Jose A Lorente
- GENYO, Centre for Genomics and Oncological Research, Granada, Spain
| | - Pedro Sánchez-Rovira
- UGC de Oncología Médica, Complejo Hospitalario de Jaén, Jaén, Spain.,GENYO, Centre for Genomics and Oncological Research, Granada, Spain
| | - Jenny C Chang
- Houston Methodist Cancer Center, Houston Methodist Hospital, Houston, Texas
| | - Sergio Granados-Principal
- UGC de Oncología Médica, Complejo Hospitalario de Jaén, Jaén, Spain. .,GENYO, Centre for Genomics and Oncological Research, Granada, Spain.,FIBAO. Complejo Hospitalario de Jaén, Servicio Andaluz de Salud, Jaén, Spain
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653
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Wang C, Bai F, Zhang LH, Scott A, Li E, Pei XH. Estrogen promotes estrogen receptor negative BRCA1-deficient tumor initiation and progression. Breast Cancer Res 2018; 20:74. [PMID: 29996906 PMCID: PMC6042319 DOI: 10.1186/s13058-018-0996-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Accepted: 05/30/2018] [Indexed: 01/24/2023] Open
Abstract
BACKGROUND Estrogen promotes breast cancer development and progression mainly through estrogen receptor (ER). However, blockage of estrogen production or action prevents development of and suppresses progression of ER-negative breast cancers. How estrogen promotes ER-negative breast cancer development and progression is poorly understood. We previously discovered that deletion of cell cycle inhibitors p16Ink4a (p16) or p18Ink4c (p18) is required for development of Brca1-deficient basal-like mammary tumors, and that mice lacking p18 develop luminal-type mammary tumors. METHODS A genetic model system with three mouse strains, one that develops ER-positive mammary tumors (p18 single deletion) and the others that develop ER-negative tumors (p16;Brca1 and p18;Brca1 compound deletion), human BRCA1 mutant breast cancer patient-derived xenografts, and human BRCA1-deficient and BRCA1-proficient breast cancer cells were used to determine the role of estrogen in activating epithelial-mesenchymal transition (EMT), stimulating cell proliferation, and promoting ER-negative mammary tumor initiation and metastasis. RESULTS Estrogen stimulated the proliferation and tumor-initiating potential of both ER-positive Brca1-proficient and ER-negative Brca1-deficient tumor cells. Estrogen activated EMT in a subset of Brca1-deficient mammary tumor cells that maintained epithelial features, and enhanced the number of cancer stem cells, promoting tumor progression and metastasis. Estrogen activated EMT independent of ER in Brca1-deficient, but not Brca1-proficient, tumor cells. Estrogen activated the AKT pathway in BRCA1-deficient tumor cells independent of ER, and pharmaceutical inhibition of AKT activity suppressed EMT and cell proliferation preventing BRCA1 deficient tumor progression. CONCLUSIONS This study reveals for the first time that estrogen promotes BRCA1-deficient tumor initiation and progression by stimulation of cell proliferation and activation of EMT, which are dependent on AKT activation and independent of ER.
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Affiliation(s)
- Chuying Wang
- Department of Medical Oncology, The First Affiliated hospital of Xi’an Jiaotong University, Xi’an, Shaanxi 710061 People’s Republic of China
- Molecular Oncology Program, Division of Surgical Oncology, Dewitt Daughtry Family Department of Surgery, University of Miami, Miami, FL 33136 USA
| | - Feng Bai
- Molecular Oncology Program, Division of Surgical Oncology, Dewitt Daughtry Family Department of Surgery, University of Miami, Miami, FL 33136 USA
| | - Li-han Zhang
- Molecular Oncology Program, Division of Surgical Oncology, Dewitt Daughtry Family Department of Surgery, University of Miami, Miami, FL 33136 USA
| | - Alexandria Scott
- Molecular Oncology Program, Division of Surgical Oncology, Dewitt Daughtry Family Department of Surgery, University of Miami, Miami, FL 33136 USA
| | - Enxiao Li
- Department of Medical Oncology, The First Affiliated hospital of Xi’an Jiaotong University, Xi’an, Shaanxi 710061 People’s Republic of China
| | - Xin-Hai Pei
- Molecular Oncology Program, Division of Surgical Oncology, Dewitt Daughtry Family Department of Surgery, University of Miami, Miami, FL 33136 USA
- Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, FL 33136 USA
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654
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PPARβ/δ: Linking Metabolism to Regeneration. Int J Mol Sci 2018; 19:ijms19072013. [PMID: 29996502 PMCID: PMC6073704 DOI: 10.3390/ijms19072013] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 06/29/2018] [Accepted: 07/05/2018] [Indexed: 01/10/2023] Open
Abstract
In contrast to the general belief that regeneration is a rare event, mainly occurring in simple organisms, the ability of regeneration is widely distributed in the animal kingdom. Yet, the efficiency and extent of regeneration varies greatly. Humans can recover from blood loss as well as damage to tissues like bone and liver. Yet damage to the heart and brain cannot be reversed, resulting in scaring. Thus, there is a great interest in understanding the molecular mechanisms of naturally occurring regeneration and to apply this knowledge to repair human organs. During regeneration, injury-activated immune cells induce wound healing, extracellular matrix remodeling, migration, dedifferentiation and/or proliferation with subsequent differentiation of somatic or stem cells. An anti-inflammatory response stops the regenerative process, which ends with tissue remodeling to achieve the original functional state. Notably, many of these processes are associated with enhanced glycolysis. Therefore, peroxisome proliferator-activated receptor (PPAR) β/δ—which is known to be involved for example in lipid catabolism, glucose homeostasis, inflammation, survival, proliferation, differentiation, as well as mammalian regeneration of the skin, bone and liver—appears to be a promising target to promote mammalian regeneration. This review summarizes our current knowledge of PPARβ/δ in processes associated with wound healing and regeneration.
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655
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Shirato K, Koda T, Takanari J, Ogasawara J, Sakurai T, Ohno H, Kizaki T. ETAS®50 Attenuates Ultraviolet-B-Induced Interleukin-6 Expression by Suppressing Akt Phosphorylation in Normal Human Dermal Fibroblasts. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2018; 2018:1547120. [PMID: 30108645 PMCID: PMC6077605 DOI: 10.1155/2018/1547120] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 06/09/2018] [Accepted: 06/20/2018] [Indexed: 12/04/2022]
Abstract
We recently reported that ETAS 50, a standardized extract from the Asparagus officinalis stem, exerted anti-inflammatory effects on ultraviolet-B- (UV-B-) irradiated normal human dermal fibroblasts (NHDFs) by inhibiting nuclear factor-κB p65 nuclear import and the resulting interleukin-1β (IL-1β) expression. To further elucidate the antiphotoaging potency of ETAS 50, we examined the anti-inflammatory effects on UV-B-irradiated NHDFs by focusing on the stress-activated mitogen-activated protein kinase (MAPK) and Akt signaling pathways. NHDFs were treated with 1 mg/mL of ETAS 50 or dextrin (vehicle control) after UV-B irradiation (20 mJ/cm2) for different time periods. Phosphorylation levels of c-Jun N-terminal kinase (JNK), p38 MAPK, and Akt were analyzed by western blotting. IL-6 mRNA levels were analyzed by real-time polymerase chain reaction. UV-B-irradiated NHDFs showed increased phosphorylation levels of JNK, p38 MAPK, and Akt, as well as increased mRNA levels of IL-6. ETAS 50 treatment after UV-B irradiation suppressed the increased phosphorylation levels of Akt without affecting those of JNK and p38 MAPK. ETAS 50 as well as Akt inhibitor Perifosine repressed UV-B irradiation-induced IL-6 mRNA expression. These results suggest that ETAS 50 treatment represses UV-B irradiation-induced IL-6 expression by suppressing Akt phosphorylation. The present findings demonstrate the potential of ETAS 50 to prevent photoaging by attenuating UV-B irradiation-induced proinflammatory responses in skin fibroblasts.
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Affiliation(s)
- Ken Shirato
- Department of Molecular Predictive Medicine and Sport Science, Kyorin University School of Medicine, 6-20-2 Shinkawa, Mitaka, Tokyo 181-8611, Japan
| | - Tomoko Koda
- Faculty of Nursing, Tokyo Healthcare University, 2-5-1 Higashigaoka, Meguro, Tokyo 152-8558, Japan
| | - Jun Takanari
- Amino Up Chemical Co. Ltd., 363-32 Shin-ei, Kiyota, Sapporo, Hokkaido 004-0839, Japan
| | - Junetsu Ogasawara
- Department of Health Science, Asahikawa Medical University, 2-1-1-1 Midorigaoka-Higashi, Asahikawa, Hokkaido 078-8510, Japan
| | - Takuya Sakurai
- Department of Molecular Predictive Medicine and Sport Science, Kyorin University School of Medicine, 6-20-2 Shinkawa, Mitaka, Tokyo 181-8611, Japan
| | - Hideki Ohno
- Social Medical Corporation, The Yamatokai Foundation, 1-13-12 Nangai, Higashiyamato, Tokyo 207-0014, Japan
| | - Takako Kizaki
- Department of Molecular Predictive Medicine and Sport Science, Kyorin University School of Medicine, 6-20-2 Shinkawa, Mitaka, Tokyo 181-8611, Japan
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656
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Chen S, Jia L, Zhang S, Zheng Y, Zhou Y. DEPTOR regulates osteogenic differentiation via inhibiting MEG3-mediated activation of BMP4 signaling and is involved in osteoporosis. Stem Cell Res Ther 2018; 9:185. [PMID: 29973283 PMCID: PMC6033203 DOI: 10.1186/s13287-018-0935-9] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 05/02/2018] [Accepted: 06/18/2018] [Indexed: 02/07/2023] Open
Abstract
Background The mammalian target of rapamycin (mTOR) pathway plays a significant role in osteogenic differentiation and bone maintenance. As the only known endogenous inhibitor of mTOR function, DEP domain containing mTOR interacting protein (DEPTOR) is potentially involved in stem cell differentiation, although the pathophysiological significance and its molecular mechanisms remain unclear. The present study aimed to elucidate the effects of DEPTOR on the progress of osteoporosis and investigate the underlying molecular mechanisms of osteogenic regulation. Methods An ovariectomy mouse model with decreased bone formation and osteogenic induction with bone marrow mesenchymal stem cells (BMSCs) were used to investigate the relationship between DEPTOR and osteogenic events. A loss-of-function investigation was then performed to explore the role of DEPTOR in the osteogenic differentiation of BMSCs both in vitro and in vivo. Finally, long noncoding RNA (lncRNA) and mRNA sequences were investigated to reveal the underlying mechanisms of DEPTOR in osteogenic regulation. RNA interference, western blotting, and chromatin immunoprecipitation assays were performed for further mechanistic determination. Results The results indicated that DEPTOR contributes to the progress of osteoporosis, and higher expression of Deptor was observed in osteoporotic bones. The expression of DEPTOR was reduced during the osteogenic differentiation of BMSCs, and knockdown of DEPTOR promoted BMSC osteogenesis in vitro and in vivo. lncRNA and mRNA sequences indicated that knockdown of DEPTOR upregulated the expression of maternally expressed 3 (nonprotein coding) (MEG3), which subsequently activated bone morphogenetic protein 4 (BMP4) signaling. Furthermore, DEPTOR could bind to a specific region (− 1000 bp ~ 0) of the MEG3 promoter to regulate its transcription, and inhibition of MEG3 reduced BMP4 activation triggered by DEPTOR knockdown. Conclusions Taken together, our study revealed a novel function of DEPTOR in osteogenic differentiation by inhibiting MEG3-mediated activation of BMP4 signaling, which suggested that DEPTOR could be a therapeutic target for bone loss diseases and skeletal tissue regeneration. Electronic supplementary material The online version of this article (10.1186/s13287-018-0935-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Si Chen
- Department of Prosthodontics, Peking University School and Hospital of Stomatology, 22 Zhongguancun South Avenue, Haidian District, Beijing, 100081, China
| | - Lingfei Jia
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, 22 Zhongguancun South Avenue, Haidian District, Beijing, 100081, China.,Central Laboratory, Peking University School and Hospital of Stomatology, 22 Zhongguancun South Avenue, Haidian District, Beijing, 100081, China.,National Clinical Research Center for Oral Diseases, 22 Zhongguancun South Avenue, Haidian District, Beijing, 100081, China
| | - Shan Zhang
- Central Laboratory, Peking University School and Hospital of Stomatology, 22 Zhongguancun South Avenue, Haidian District, Beijing, 100081, China
| | - Yunfei Zheng
- Department of Orthodontics, Peking University School and Hospital of Stomatology, 22 Zhongguancun South Avenue, Haidian District, Beijing, 100081, China. .,National Clinical Research Center for Oral Diseases, 22 Zhongguancun South Avenue, Haidian District, Beijing, 100081, China.
| | - Yongsheng Zhou
- Department of Prosthodontics, Peking University School and Hospital of Stomatology, 22 Zhongguancun South Avenue, Haidian District, Beijing, 100081, China. .,National Engineering Lab for Digital and Material Technology of Stomatology, Peking University School and Hospital of Stomatology, 22 Zhongguancun South Avenue, Haidian District, Beijing, 100081, China. .,National Clinical Research Center for Oral Diseases, 22 Zhongguancun South Avenue, Haidian District, Beijing, 100081, China.
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657
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Nie X, Zheng J, Ricupero CL, He L, Jiao K, Mao JJ. mTOR acts as a pivotal signaling hub for neural crest cells during craniofacial development. PLoS Genet 2018; 14:e1007491. [PMID: 29975682 PMCID: PMC6049956 DOI: 10.1371/journal.pgen.1007491] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Revised: 07/17/2018] [Accepted: 06/14/2018] [Indexed: 12/14/2022] Open
Abstract
mTOR is a highly conserved serine/threonine protein kinase that is critical for diverse cellular processes in both developmental and physiological settings. mTOR interacts with a set of molecules including Raptor and Rictor to form two distinct functional complexes, namely the mTORC1 and mTORC2. Here, we used novel genetic models to investigate functions of the mTOR pathway for cranial neural crest cells (NCCs), which are a temporary type of cells arising from the ectoderm layer and migrate to the pharyngeal arches participating craniofacial development. mTOR deletion elicited a proliferation deficit and excessive apoptosis of post-migratory NCCs, leading to growth arrest of the facial primordia along with midline orofacial clefts. Furthermore, NCC differentiation was impaired. Thus, NCC derivatives, such as skeletons, vasculatures and neural tissues were either rudimentary or malformed. We further demonstrate that disruption of mTOR caused P53 hyperactivity and cell cycle arrest in cranial NCCs, and lowering P53 activity by one copy reduction attenuated the severity of craniofacial phenotype in NCC-mTOR knockout mice. Remarkably, NCC-Rptor disruption caused a spectrum of defects mirroring that of the NCC-mTOR deletion, whereas NCC-Rictor disruption only caused a mild craniofacial phenotype compared to the mTOR and Rptor conditional knockout models. Altogether, our data demonstrate that mTOR functions mediated by mTORC1 are indispensable for multiple processes of NCC development including proliferation, survival, and differentiation during craniofacial morphogenesis and organogenesis, and P53 hyperactivity in part accounts for the defective craniofacial development in NCC-mTOR knockout mice.
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Affiliation(s)
- Xuguang Nie
- Center for Craniofacial Regeneration, College of Dental Medicine, Columbia University, New York, New York, United States of America
| | - Jinxuan Zheng
- Center for Craniofacial Regeneration, College of Dental Medicine, Columbia University, New York, New York, United States of America
| | - Christopher L. Ricupero
- Center for Craniofacial Regeneration, College of Dental Medicine, Columbia University, New York, New York, United States of America
| | - Ling He
- Center for Craniofacial Regeneration, College of Dental Medicine, Columbia University, New York, New York, United States of America
| | - Kai Jiao
- University of Alabama at Birmingham, Department of Genetics, Birmingham, Alabama, United States of America
| | - Jeremy J. Mao
- Center for Craniofacial Regeneration, College of Dental Medicine, Columbia University, New York, New York, United States of America
- Department of Pathology and Cell Biology, Columbia University, New York, New York, United States of America
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658
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Dong J, Zhang Z, Huang H, Mo P, Cheng C, Liu J, Huang W, Tian C, Zhang C, Li J. miR-10a rejuvenates aged human mesenchymal stem cells and improves heart function after myocardial infarction through KLF4. Stem Cell Res Ther 2018; 9:151. [PMID: 29848383 PMCID: PMC5977543 DOI: 10.1186/s13287-018-0895-0] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 04/19/2018] [Accepted: 05/02/2018] [Indexed: 01/08/2023] Open
Abstract
Background Aging is one of the key factors that regulate the function of human bone marrow mesenchymal stem cells (hBM-MSCs) and related changes in microRNA (miRNA) expression. However, data reported on aging-related miRNA changes in hBM-MSCs are limited. Methods We demonstrated previously that miR-10a is significantly decreased in aged hBM-MSCs and restoration of the miR-10a level attenuated cell senescence and increased the differentiation capacity of aged hBM-MSCs by repressing Krüpple-like factor 4 (KLF4). In the present study, miR-10a was overexpressed or KLF4 was downregulated in old hBM-MSCs by lentiviral transduction. The hypoxia-induced apoptosis, cell survival, and cell paracrine function of aged hBM-MSCs were investigated in vitro. In vivo, miR-10a-overexpressed or KLF4-downregulated old hBM-MSCs were implanted into infarcted mouse hearts after myocardial infarction (MI). The mouse cardiac function of cardiac angiogenesis was measured and cell survival of aged hBM-MSCs was investigated. Results Through lentivirus-mediated upregulation of miR-10a and downregulation of KLF4 in aged hBM-MSCs in vitro, we revealed that miR-10a decreased hypoxia-induced cell apoptosis and increased cell survival of aged hBM-MSCs by repressing the KLF4–BAX/BCL2 pathway. In vivo, transplantation of miR-10a-overexpressed aged hBM-MSCs promoted implanted stem cell survival and improved cardiac function after MI. Mechanistic studies revealed that overexpression of miR-10a in aged hBM-MSCs activated Akt and stimulated the expression of angiogenic factors, thus increasing angiogenesis in ischemic mouse hearts. Conclusions miR-10a rejuvenated aged hBM-MSCs which improved angiogenesis and cardiac function in injured mouse hearts. Electronic supplementary material The online version of this article (10.1186/s13287-018-0895-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Jun Dong
- Guangzhou Institute of Cardiovascular Disease, Department of Cardiology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510260, China.,Department of Oncology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Zhenhui Zhang
- Guangzhou Institute of Cardiovascular Disease, Department of Cardiology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510260, China.,Department of Intensive Care Unit, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Hongshen Huang
- Guangzhou Institute of Cardiovascular Disease, Department of Cardiology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510260, China
| | - Pei Mo
- Guangzhou Institute of Cardiovascular Disease, Department of Cardiology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510260, China
| | - Chuanfan Cheng
- Guangzhou Institute of Cardiovascular Disease, Department of Cardiology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510260, China
| | - Jianwei Liu
- Guangzhou Institute of Cardiovascular Disease, Department of Cardiology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510260, China
| | - Weizhao Huang
- Guangzhou Institute of Cardiovascular Disease, Department of Cardiology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510260, China
| | - Chaowei Tian
- Guangzhou Institute of Cardiovascular Disease, Department of Cardiology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510260, China
| | - Chongyu Zhang
- Guangzhou Institute of Cardiovascular Disease, Department of Cardiology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510260, China.,Toronto General Research Institute, University Health Network, Toronto, Canada
| | - Jiao Li
- Guangzhou Institute of Cardiovascular Disease, Department of Cardiology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510260, China. .,Toronto General Research Institute, University Health Network, Toronto, Canada.
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659
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Moreno-Marín N, Merino JM, Alvarez-Barrientos A, Patel DP, Takahashi S, González-Sancho JM, Gandolfo P, Rios RM, Muñoz A, Gonzalez FJ, Fernández-Salguero PM. Aryl Hydrocarbon Receptor Promotes Liver Polyploidization and Inhibits PI3K, ERK, and Wnt/β-Catenin Signaling. iScience 2018; 4:44-63. [PMID: 30240752 PMCID: PMC6147018 DOI: 10.1016/j.isci.2018.05.006] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Revised: 04/25/2018] [Accepted: 05/09/2018] [Indexed: 01/02/2023] Open
Abstract
Aryl hydrocarbon receptor (AhR) deficiency alters tissue homeostasis. However, how AhR regulates organ maturation and differentiation remains mostly unknown. Liver differentiation entails a polyploidization process fundamental for cell growth, metabolism, and stress responses. Here, we report that AhR regulates polyploidization during the preweaning-to-adult mouse liver maturation. Preweaning AhR-null (AhR−/−) livers had smaller hepatocytes, hypercellularity, altered cell cycle regulation, and enhanced proliferation. Those phenotypes persisted in adult AhR−/− mice and correlated with compromised polyploidy, predominance of diploid hepatocytes, and enlarged centrosomes. Phosphatidylinositol-3-phosphate kinase (PI3K), extracellular signal-regulated kinase (ERK), and Wnt/β-catenin signaling remained upregulated from preweaning to adult AhR-null liver, likely increasing mammalian target of rapamycin (mTOR) activation. Metabolomics revealed the deregulation of mitochondrial oxidative phosphorylation intermediates succinate and fumarate in AhR−/− liver. Consistently, PI3K, ERK, and Wnt/β-catenin inhibition partially rescued polyploidy in AhR−/− mice. Thus, AhR may integrate survival, proliferation, and metabolism for liver polyploidization. Since tumor cells tend to be polyploid, AhR modulation could have therapeutic value in the liver. AhR is required for liver polyploidization during preweaning-to-adult transition INS-R/PI3K/AKT, ERK, Wnt/β-Cat and mTOR are downregulated during liver polyploidization Reduced polyploidy relates with enhanced mitochondrial metabolism in AhR-null liver Understanding how AhR modulates polyploidy may provide strategies against cancer
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Affiliation(s)
- Nuria Moreno-Marín
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias, Universidad de Extremadura, Badajoz, Badajoz 06071, Spain
| | - Jaime M Merino
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias, Universidad de Extremadura, Badajoz, Badajoz 06071, Spain
| | - Alberto Alvarez-Barrientos
- Servicio de Técnicas Aplicadas a las Biociencias (STAB), Universidad de Extremadura, Badajoz, Badajoz 06071, Spain
| | - Daxeshkumar P Patel
- Laboratory of Metabolism, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Shogo Takahashi
- Laboratory of Metabolism, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - José M González-Sancho
- Instituto de Investigaciones Biomédicas "Alberto Sols", Consejo Superior de Investigaciones Científicas - Universidad Autónoma de Madrid, and CIBER de Cáncer (CIBERONC), Instituto de Salud Carlos III, Madrid 28029, Spain
| | - Pablo Gandolfo
- Cell Signaling Department, CABIMER-CSIC, Sevilla 41092, Spain
| | - Rosa M Rios
- Cell Signaling Department, CABIMER-CSIC, Sevilla 41092, Spain
| | - Alberto Muñoz
- Instituto de Investigaciones Biomédicas "Alberto Sols", Consejo Superior de Investigaciones Científicas - Universidad Autónoma de Madrid, and CIBER de Cáncer (CIBERONC), Instituto de Salud Carlos III, Madrid 28029, Spain
| | - Frank J Gonzalez
- Laboratory of Metabolism, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Pedro M Fernández-Salguero
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias, Universidad de Extremadura, Badajoz, Badajoz 06071, Spain.
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660
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Shen K, Johnson DW, Vesey DA, McGuckin MA, Gobe GC. Role of the unfolded protein response in determining the fate of tumor cells and the promise of multi-targeted therapies. Cell Stress Chaperones 2018; 23:317-334. [PMID: 28952072 PMCID: PMC5904077 DOI: 10.1007/s12192-017-0844-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2017] [Accepted: 09/13/2017] [Indexed: 02/06/2023] Open
Abstract
Although there have been advances in our understanding of carcinogenesis and development of new treatments, cancer remains a common cause of death. Many regulatory pathways are incompletely understood in cancer development and progression, with a prime example being those related to the endoplasmic reticulum (ER). The pathological sequelae that arise from disruption of ER homeostasis are not well defined. The ER is an organelle that is responsible for secretory protein biosynthesis and the quality control of protein folding. The ER triggers an unfolded protein response (UPR) when misfolded proteins accumulate, and while the UPR acts to restore protein folding and ER homeostasis, this response can work as a switch to determine the death or survival of cells. The treatment of cancer with agents that target the UPR has shown promising outcomes. The UPR has wide crosstalk with other signaling pathways. Multi-targeted cancer therapies which target the intersections within signaling networks have shown synergistic tumoricidal effects. In the present review, the basic cellular and signaling pathways of the ER and UPR are introduced; then the crosstalk between the ER and other signaling pathways is summarized; and ultimately, the evidence that the UPR is a potential target for cancer therapy is discussed. Regulation of the UPR downstream signaling is a common therapeutic target for different tumor types. Tumoricidal effects achieved from modulating the UPR downstream signaling could be enhanced by phosphodiesterase 5 (PDE5) inhibitors. Largely untapped by Western medicine for cancer therapies are Chinese herbal medicines. This review explores and discusses the value of some Chinese herbal extracts as PDE5 inhibitors.
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Affiliation(s)
- Kunyu Shen
- Kidney Disease Research Group, UQ Diamantina Institute, Translational Research Institute, The University of Queensland, 37 Kent Street, Woolloongabba, Brisbane, 4102, Australia
| | - David W Johnson
- Kidney Disease Research Group, UQ Diamantina Institute, Translational Research Institute, The University of Queensland, 37 Kent Street, Woolloongabba, Brisbane, 4102, Australia
- Department of Nephrology, Princess Alexandra Hospital, Woolloongabba, Brisbane, Australia
- Centre for Health Services Research, Faculty of Medicine, The University of Queensland, Brisbane, Australia
| | - David A Vesey
- Department of Nephrology, Princess Alexandra Hospital, Woolloongabba, Brisbane, Australia
- Centre for Health Services Research, Faculty of Medicine, The University of Queensland, Brisbane, Australia
| | - Michael A McGuckin
- Mucosal Disease Inflammatory Disease Biology and Therapeutics Group, UQ Mater Research Institute, Translational Research Institute, The University of Queensland, Brisbane, QLD, Australia
| | - Glenda C Gobe
- Kidney Disease Research Group, UQ Diamantina Institute, Translational Research Institute, The University of Queensland, 37 Kent Street, Woolloongabba, Brisbane, 4102, Australia.
- Centre for Health Services Research, Faculty of Medicine, The University of Queensland, Brisbane, Australia.
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661
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Zhang X, Kong Y, Sun Y, Qian Z, Gao C, Shi X, Li S, Piao Y, Piao F. Bone marrow mesenchymal stem cells conditioned medium protects VSC4.1 cells against 2,5-hexanedione-induced autophagy via NGF-PI3K/Akt/mTOR signaling pathway. Brain Res 2018; 1696:1-9. [PMID: 29705604 DOI: 10.1016/j.brainres.2018.04.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Revised: 04/23/2018] [Accepted: 04/24/2018] [Indexed: 01/08/2023]
Abstract
We aimed to investigate the effects of bone marrow mesenchymal stem cell conditioned medium (BMSC-CM) in preventing 2,5-hexanedione (HD)-induced damage to motoneurons, and examined the molecular mechanisms that mediate these effects. VSC4.1 cells were exposed to 25 mM HD for 24 h followed by incubation with DMEM for 24 h. HD-treated cells were incubated with BMSC-CM at varied concentrations. Incubation with BMSC-CM ameliorated the decreased cell viability and reduced LDH release from cells exposed to HD. BMSC-CM suppressed the elevated number of autophagic vacuoles, cells with LC3 puncta, increased LC3-II/LC3-I ratio, and decreased p62 caused by HD exposure. BMSC-CM elevated NGF and p-TrkA expressions in HD-treated cells. Administration of NGF inhibited autophagy, an effect that was similar to that observed after BMSC-CM treatment; this effect was abolished by the addition of NGF-neutralizing antibodies. BMSC-CM or NGF elevated p-protein kinase B (Akt) and p-mammalian target of rapamycin (mTOR) in HD-exposed cells, which was interrupted by TrkA inhibitor, K252a and mTOR inhibitor, rapamycin. BMSC-CM prevented HD-induced autophagic cell damage in VSC4.1 cells. The neuroprotective effect of BMSC-CM appeared to be at least partly associated with its ability to trigger the NGF-phosphatidylinositol-3-kinase (PI3K)/Akt/mTOR signaling pathway.
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Affiliation(s)
- Xin Zhang
- Department of Occupational and Environmental Health, Dalian Medical University, Dalian 116044, China; Department of Clinical Nutrition, The First Affiliated Hospital of Dalian Medical University, Dalian 116011, China
| | - Ying Kong
- Department of Biochemistry and Molecular Biology, Dalian, Liaoning 116044, China
| | - Yijie Sun
- Department of Occupational and Environmental Health, Dalian Medical University, Dalian 116044, China
| | - Zhiqiang Qian
- Department of Occupational and Environmental Health, Dalian Medical University, Dalian 116044, China
| | - Chenxue Gao
- Department of Occupational and Environmental Health, Dalian Medical University, Dalian 116044, China
| | - Xiaoxia Shi
- Department of Occupational and Environmental Health, Dalian Medical University, Dalian 116044, China
| | - Shuangyue Li
- Department of Occupational and Environmental Health, Dalian Medical University, Dalian 116044, China
| | - Yongjun Piao
- Department of Dermatology, The First Affiliated Hospital of Dalian Medical University, Dalian 116011, China.
| | - Fengyuan Piao
- Department of Occupational and Environmental Health, Dalian Medical University, Dalian 116044, China.
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662
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Icaritin induces ovarian cancer cell apoptosis through activation of p53 and inhibition of Akt/mTOR pathway. Life Sci 2018; 202:188-194. [PMID: 29625193 DOI: 10.1016/j.lfs.2018.03.059] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 03/18/2018] [Accepted: 03/30/2018] [Indexed: 02/06/2023]
Abstract
AIMS Ovarian cancer (OC) has the highest mortality rate of all gynecological cancers. Currently, the first-line OC treatment consists of cytoreductive surgery and platinum-based chemotherapy. However, most patients develop chemoresistance after the first-line treatment limits the success of treatment. Therefore, there is an urgent need to identify effective therapeutic agents. MAIN METHODS Cell viabilities were detected by MTS assay; Annexin V-FITC/PI assay and western blotting assay were performed to analyze the apoptotic cells in vitro; An immunofluorescence assay was performed to analyze the TUNEL+ apoptotic cells in vivo; Patient-derived xenografts were established to test the in vivo antitumor effects; The key proteins of p53, caspase-mediated apoptotic pathway and Akt/mTOR pathway were detected by Western blotting. KEY FINDINGS Icaritin, a prenylflavonoid derivative from Epimedium Genus, inhibited the proliferation of drug-sensitive OC cells (OV2008 and C13*) and cisplatin resistant OC cells A2780cp. Icaritin induced OC cell apoptosis in vitro, as indicated by the increase of Annexin V+/PI+ apoptotic cells analyzed with flow cytometry, and the cleavage of caspase 9, caspase 3 and poly-ADP-ribose polymerase (PARP) detected with western blotting. Icaritin also inhibited tumor growth and induced OC cells apoptosis in patient-derived xenografts, as indicated by the tumor growth delay and increase of TUNEL-positive cells in tumor tissues. The icaritin-induced OC cell apoptosis may be associated with the activation of p53 and the suppression of Akt/mTOR pathway. SIGNIFICANCE This study sheds light on the underlying mechanisms of antitumor effect of icaritin, and warrants clinical trial for treatment of OC.
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663
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Sheikh MH, Solito E. Annexin A1: Uncovering the Many Talents of an Old Protein. Int J Mol Sci 2018; 19:E1045. [PMID: 29614751 PMCID: PMC5979524 DOI: 10.3390/ijms19041045] [Citation(s) in RCA: 128] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Revised: 03/07/2018] [Accepted: 03/15/2018] [Indexed: 12/11/2022] Open
Abstract
Annexin A1 (ANXA1) has long been classed as an anti-inflammatory protein due to its control over leukocyte-mediated immune responses. However, it is now recognized that ANXA1 has widespread effects beyond the immune system with implications in maintaining the homeostatic environment within the entire body due to its ability to affect cellular signalling, hormonal secretion, foetal development, the aging process and development of disease. In this review, we aim to provide a global overview of the role of ANXA1 covering aspects of peripheral and central inflammation, immune repair and endocrine control with focus on the prognostic, diagnostic and therapeutic potential of the molecule in cancer, neurodegeneration and inflammatory-based disorders.
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Affiliation(s)
- Madeeha H Sheikh
- The William Harvey Research Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, UK.
| | - Egle Solito
- The William Harvey Research Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, UK.
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664
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Kim H, Lin Q, Glazer PM, Yun Z. The hypoxic tumor microenvironment in vivo selects the cancer stem cell fate of breast cancer cells. Breast Cancer Res 2018; 20:16. [PMID: 29510720 PMCID: PMC5840770 DOI: 10.1186/s13058-018-0944-8] [Citation(s) in RCA: 88] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Accepted: 02/19/2018] [Indexed: 12/23/2022] Open
Abstract
Background Tumor hypoxia is an independent prognostic factor associated with poor patient survival. Emerging evidence suggests that hypoxia can potentially maintain or enhance the stem cell phenotype of both normal stem cells and cancer cells. However, it remains to be determined whether cell fate is regulated in vivo by the hypoxic tumor microenvironment (TME). Methods We established a hypoxia-sensing xenograft model to identify hypoxic tumor cell in vivo primarily using human breast cancer cell lines MDA-MB-231 and MCF7. Hypoxic tumor cells were identified in situ by fluorescence of green fluorescence protein. They were further isolated from xenografts, purified and sorted by flow cytometry for detailed analysis of their stem cell characteristics. Results We have found that hypoxic tumor cells freshly isolated from xenografts contain increased subpopulations of tumor cells with cancer stem cell (CSC)-like characteristics. The CSC characteristics of the hypoxic tumor cells are further enhanced upon re-implantation in vivo, whereas secondary xenografts derived from the non-hypoxic tumor cells remain similar to the primary xenografts. Interestingly, the phenotypes exhibited by the hypoxic tumor cells are stable and remain distinctively different from those of the non-hypoxic tumor cells isolated from the same tumor mass even when they are maintained under the same ambient culture conditions. Mechanistically, the PI3K/AKT pathway is strongly potentiated in the hypoxic tumor cells and is required to maintain the CSC-like phenotype. Importantly, the differential cell fates between hypoxic and non-hypoxic tumor cells are only found in tumor cells isolated from the hypoxic TME in vivo and are not seen in tumor cells treated by hypoxia in vitro alone. Conclusions These previously unknown observations suggest that the hypoxic TME may promote malignant progression and therapy resistance by coordinating induction, selection and/or preferential maintenance of the CSC-like phenotype in tumor cells. Electronic supplementary material The online version of this article (10.1186/s13058-018-0944-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Hoon Kim
- Department of Therapeutic Radiology, Yale University School of Medicine, P. O. Box 208040, New Haven, CT, 06520-8040, USA
| | - Qun Lin
- Department of Therapeutic Radiology, Yale University School of Medicine, P. O. Box 208040, New Haven, CT, 06520-8040, USA
| | - Peter M Glazer
- Department of Therapeutic Radiology, Yale University School of Medicine, P. O. Box 208040, New Haven, CT, 06520-8040, USA
| | - Zhong Yun
- Department of Therapeutic Radiology, Yale University School of Medicine, P. O. Box 208040, New Haven, CT, 06520-8040, USA.
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665
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Bal-Price A, Hogberg HT, Crofton KM, Daneshian M, FitzGerald RE, Fritsche E, Heinonen T, Hougaard Bennekou S, Klima S, Piersma AH, Sachana M, Shafer TJ, Terron A, Monnet-Tschudi F, Viviani B, Waldmann T, Westerink RHS, Wilks MF, Witters H, Zurich MG, Leist M. Recommendation on test readiness criteria for new approach methods in toxicology: Exemplified for developmental neurotoxicity. ALTEX-ALTERNATIVES TO ANIMAL EXPERIMENTATION 2018; 35:306-352. [PMID: 29485663 DOI: 10.14573/altex.1712081] [Citation(s) in RCA: 95] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Accepted: 01/29/2018] [Indexed: 01/06/2023]
Abstract
Multiple non-animal-based test methods have never been formally validated. In order to use such new approach methods (NAMs) in a regulatory context, criteria to define their readiness are necessary. The field of developmental neurotoxicity (DNT) testing is used to exemplify the application of readiness criteria. The costs and number of untested chemicals are overwhelming for in vivo DNT testing. Thus, there is a need for inexpensive, high-throughput NAMs, to obtain initial information on potential hazards, and to allow prioritization for further testing. A background on the regulatory and scientific status of DNT testing is provided showing different types of test readiness levels, depending on the intended use of data from NAMs. Readiness criteria, compiled during a stakeholder workshop, uniting scientists from academia, industry and regulatory authorities are presented. An important step beyond the listing of criteria, was the suggestion for a preliminary scoring scheme. On this basis a (semi)-quantitative analysis process was assembled on test readiness of 17 NAMs with respect to various uses (e.g. prioritization/screening, risk assessment). The scoring results suggest that several assays are currently at high readiness levels. Therefore, suggestions are made on how DNT NAMs may be assembled into an integrated approach to testing and assessment (IATA). In parallel, the testing state in these assays was compiled for more than 1000 compounds. Finally, a vision is presented on how further NAM development may be guided by knowledge of signaling pathways necessary for brain development, DNT pathophysiology, and relevant adverse outcome pathways (AOP).
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Affiliation(s)
- Anna Bal-Price
- European Commission, Joint Research Centre (EC JRC), Ispra (VA), Italy
| | - Helena T Hogberg
- Center for Alternatives to Animal Testing (CAAT), Johns Hopkins University, Baltimore, MD, USA
| | - Kevin M Crofton
- National Centre for Computational Toxicology, US EPA, RTP, Washington, NC, USA
| | - Mardas Daneshian
- Center for Alternatives to Animal Testing, CAAT-Europe, University of Konstanz, Konstanz, Germany
| | - Rex E FitzGerald
- Swiss Centre for Human Applied Toxicology, SCAHT, University of Basle, Switzerland
| | - Ellen Fritsche
- IUF - Leibniz Research Institute for Environmental Medicine & Heinrich-Heine-University, Düsseldorf, Germany
| | - Tuula Heinonen
- Finnish Centre for Alternative Methods (FICAM), University of Tampere, Tampere, Finland
| | | | - Stefanie Klima
- In vitro Toxicology and Biomedicine, Department of Biology, University of Konstanz, Konstanz, Germany
| | - Aldert H Piersma
- RIVM, National Institute for Public Health and the Environment, Bilthoven, and Institute for Risk Assessment Sciences, Utrecht University, Utrecht, The Netherlands
| | - Magdalini Sachana
- Organisation for Economic Co-operation and Development (OECD), Paris, France
| | - Timothy J Shafer
- National Centre for Computational Toxicology, US EPA, RTP, Washington, NC, USA
| | | | - Florianne Monnet-Tschudi
- Swiss Centre for Human Applied Toxicology, SCAHT, University of Basle, Switzerland.,Department of Physiology, University of Lausanne, Lausanne, Switzerland
| | - Barbara Viviani
- Department of Pharmacological and Biomolecular Sciences, University of Milan, Italy
| | - Tanja Waldmann
- In vitro Toxicology and Biomedicine, Department of Biology, University of Konstanz, Konstanz, Germany
| | - Remco H S Westerink
- Neurotoxicology Research Group, Institute for Risk Assessment Sciences (IRAS), Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Martin F Wilks
- Swiss Centre for Human Applied Toxicology, SCAHT, University of Basle, Switzerland
| | - Hilda Witters
- VITO, Flemish Institute for Technological Research, Unit Environmental Risk and Health, Mol, Belgium
| | - Marie-Gabrielle Zurich
- Swiss Centre for Human Applied Toxicology, SCAHT, University of Basle, Switzerland.,Department of Physiology, University of Lausanne, Lausanne, Switzerland
| | - Marcel Leist
- Center for Alternatives to Animal Testing, CAAT-Europe, University of Konstanz, Konstanz, Germany.,In vitro Toxicology and Biomedicine, Department of Biology, University of Konstanz, Konstanz, Germany
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666
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Polycomb protein family member CBX7 regulates intrinsic axon growth and regeneration. Cell Death Differ 2018; 25:1598-1611. [PMID: 29459770 PMCID: PMC6143612 DOI: 10.1038/s41418-018-0064-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Revised: 12/25/2017] [Accepted: 01/08/2018] [Indexed: 01/28/2023] Open
Abstract
Neurons in the central nervous system (CNS) lose their intrinsic ability and fail to regenerate, but the underlying mechanisms are largely unknown. Polycomb group (PcG) proteins, which include PRC1 and PRC2 complexes function as gene repressors and are involved in many biological processes. Here we report that PRC1 components (polycomb chromobox (CBX) 2, 7, and 8) are novel regulators of axon growth and regeneration. Especially, knockdown of CBX7 in either embryonic cortical neurons or adult dorsal root ganglion (DRG) neurons enhances their axon growth ability. Two important transcription factors GATA4 and SOX11 are functional downstream targets of CBX7 in controlling axon regeneration. Moreover, knockdown of GATA4 or SOX11 in cultured DRG neurons inhibits axon regeneration response from CBX7 downregulation in DRG neurons. These findings suggest that targeting CBX signaling pathway may be a novel approach for promoting the intrinsic regenerative capacity of damaged CNS neurons.
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667
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Genetic modification to induce CXCR2 overexpression in mesenchymal stem cells enhances treatment benefits in radiation-induced oral mucositis. Cell Death Dis 2018; 9:229. [PMID: 29445104 PMCID: PMC5833705 DOI: 10.1038/s41419-018-0310-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 12/26/2017] [Accepted: 01/08/2018] [Indexed: 12/13/2022]
Abstract
Radiation-induced oral mucositis affects patient quality of life and reduces tolerance to cancer therapy. Unfortunately, traditional treatments are insufficient for the treatment of mucositis and might elicit severe side effects. Due to their immunomodulatory and anti-inflammatory properties, the transplantation of mesenchymal stem cells (MSCs) is a potential therapeutic strategy for mucositis. However, systemically infused MSCs rarely reach inflamed sites, impacting their clinical efficacy. Previous studies have demonstrated that chemokine axes play an important role in MSC targeting. By systematically evaluating the expression patterns of chemokines in radiation/chemical-induced oral mucositis, we found that CXCL2 was highly expressed, whereas cultured MSCs negligibly express the CXCL2 receptor CXCR2. Thus, we explored the potential therapeutic benefits of the transplantation of CXCR2-overexpressing MSCs (MSCsCXCR2) for mucositis treatment. Indeed, MSCsCXCR2 exhibited enhanced targeting ability to the inflamed mucosa in radiation/chemical-induced oral mucositis mouse models. Furthermore, we found that MSCCXCR2 transplantation accelerated ulcer healing by suppressing the production of pro-inflammatory chemokines and radiogenic reactive oxygen species (ROS). Altogether, these findings indicate that CXCR2 overexpression in MSCs accelerates ulcer healing, providing new insights into cell-based therapy for radiation/chemical-induced oral mucositis.
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668
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Yu MH, Lin MC, Huang CN, Chan KC, Wang CJ. Acarbose inhibits the proliferation and migration of vascular smooth muscle cells via targeting Ras signaling. Vascul Pharmacol 2018; 103-105:8-15. [PMID: 29432898 DOI: 10.1016/j.vph.2018.02.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Revised: 12/22/2017] [Accepted: 02/06/2018] [Indexed: 12/31/2022]
Abstract
Atherosclerosis involves the proliferation and migration of vascular smooth muscle cells (VSMCs). The migration of VSMCs from the media into the intima and their subsequent proliferation are important processes in neointima formation in atherosclerosis and restenosis after percutaneous coronary interventions. Acarbose, an alpha-glucosidase inhibitor, has been demonstrated to not affect serum levels of glucose and decrease the progression of intima-media thickening in rabbits fed with a high cholesterol diet (HCD). We previously showed that increased Ras protein levels enhanced the migration of TNF-α treated A7r5 cells. The aim of this study was to determine the inhibitory effects of acarbose on Ras expression in A7r5 cells. Acarbose also inhibited the phosphorylation of focal adhesion kinase (FAK) and Akt, activities of the matrix metalloproteinases (MMPs) MMP-2 and MMP-9, and protein expressions of small G proteins (Ras, Cdc42, RhoA, and Rac1) in a dose-dependent manner. We also found that acarbose could effectively inhibit the proliferation and migration of RasG12V A7r5 cells by blocking small G proteins and phosphoinositide-3-kinase (PI3K)/Akt signaling. These studies demonstrated that acarbose could theoretically decrease atherosclerosis by targeting Ras signaling.
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Affiliation(s)
- Meng-Hsun Yu
- Institute of Biochemistry, Microbiology and Immunology, Chung Shan Medical University, No. 110, Sec. 1, Jianguo N. Road, Taichung 402, Taiwan
| | - Ming-Cheng Lin
- Department of Internal Medicine, Chung-Shan Medical University Hospital, No. 110, Sec. 1, Jianguo N. Road, Taichung 402, Taiwan; School of Medicine, Institute of Medicine, Chung-Shan Medical University, No. 110, Sec. 1, Jianguo N. Road, Taichung 402, Taiwan
| | - Chien-Ning Huang
- Department of Internal Medicine, Chung-Shan Medical University Hospital, No. 110, Sec. 1, Jianguo N. Road, Taichung 402, Taiwan; School of Medicine, Institute of Medicine, Chung-Shan Medical University, No. 110, Sec. 1, Jianguo N. Road, Taichung 402, Taiwan
| | - Kuei-Chuan Chan
- Department of Internal Medicine, Chung-Shan Medical University Hospital, No. 110, Sec. 1, Jianguo N. Road, Taichung 402, Taiwan; School of Medicine, Institute of Medicine, Chung-Shan Medical University, No. 110, Sec. 1, Jianguo N. Road, Taichung 402, Taiwan.
| | - Chau-Jong Wang
- Institute of Biochemistry, Microbiology and Immunology, Chung Shan Medical University, No. 110, Sec. 1, Jianguo N. Road, Taichung 402, Taiwan; Department of Medical Research, Chung Shan Medical University Hospital, No. 110, Sec. 1, Jianguo N. Road, Taichung 402, Taiwan.
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669
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Lam TG, Jeong YS, Kim SA, Ahn SG. New metformin derivative HL156A prevents oral cancer progression by inhibiting the insulin-like growth factor/AKT/mammalian target of rapamycin pathways. Cancer Sci 2018; 109:699-709. [PMID: 29285837 PMCID: PMC5834796 DOI: 10.1111/cas.13482] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Revised: 12/14/2017] [Accepted: 12/24/2017] [Indexed: 12/14/2022] Open
Abstract
Metformin is a biguanide widely prescribed as an antidiabetic drug for type 2 diabetes mellitus patients. The purpose of the present study was to observe the effects of the new metformin derivative, HL156A, on human oral cancer cell and to investigate its possible mechanisms. It was observed that HL156A significantly decreased FaDu and YD‐10B cell viability and colony formation in a dose‐dependent way. HL156A also markedly reduced wound closure and migration of FaDu and YD‐10B cells. We observed that HL156A decreased mitochondrial membrane potential and induced reactive oxygen species (ROS) levels and apoptotic cells with caspase‐3 and ‐9 activation. HL156A inhibited the expression and activation of insulin‐like growth factor (IGF)‐1 and its downstream proteins, AKT, mammalian target of rapamycin (mTOR), and ERK1/2. In addition, HL156A activated AMP‐activated protein kinase/nuclear factor kappa B (AMPK‐NF‐κB) signaling of FaDu and YD‐10B cells. A xenograft mouse model further showed that HL156A suppressed AT84 mouse oral tumor growth, accompanied by down‐regulated p‐IGF‐1, p‐mTOR, proliferating cell nuclear antigen (PCNA) and promoted p‐AMPK and TUNEL expression. These results suggest the potential value of the new metformin derivative HL156A as a candidate for a therapeutic modality for the treatment of oral cancer.
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Affiliation(s)
- Thuy Giang Lam
- Department of Pathology, College of Dentistry, Chosun University, Gwangju, South Korea
| | - Yun Soo Jeong
- Department of Pathology, College of Dentistry, Chosun University, Gwangju, South Korea
| | - Soo-A Kim
- Department of Biochemistry, College of Oriental Medicine, Dongguk University, Gyeongju, South Korea
| | - Sang-Gun Ahn
- Department of Pathology, College of Dentistry, Chosun University, Gwangju, South Korea
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670
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Feng J, Liao Y, Xu X, Yi Q, He L, Tang L. hnRNP A1 promotes keratinocyte cell survival post UVB radiation through PI3K/Akt/mTOR pathway. Exp Cell Res 2018; 362:394-399. [PMID: 29229447 DOI: 10.1016/j.yexcr.2017.12.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 11/29/2017] [Accepted: 12/06/2017] [Indexed: 12/22/2022]
Abstract
hnRNP A1 acts as a critical splicing factor in regulating many alternative splicing events in various physiological and pathophysiological progressions. hnRNP A1 is capable of regulating UVB-induced hdm2 gene alternative splicing according to our previous study. However, the biological function and underlying molecular mechanism of hnRNP A1 in cell survival and cell cycle in response to UVB irradiation are still unclear. In this study, silencing hnRNP A1 expression by siRNA transfection led to decreased cell survival after UVB treatment, while promoting hnRNP A1 by lentiviruse vector resulted in increased cell survival. hnRNP A1 remarkably enhanced PI3K/Akt/mTOR signaling pathway by increasing phosphorylation of Akt, mTOR and P70S6 protein. Inhibition of PI3K/Akt signaling by LY294002 suppressed the expression of hnRNP A1. While mTOR signaling inhibitors, rapamycin and AZD8055, did not influence hnRNP A1 expression in HaCaT cells, suggesting that hnRNP A1 may be an upstream mediator of mTOR signaling. Furthermore, hnRNP A1 could alleviate UVB-provoked cell cycle arrest at G0/G1 phase and promoted cell cycle progression at G2/M phase. Our results indicate that hnRNP A1 promotes cell survival and cell cycle progression following UVB radiation.
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Affiliation(s)
- Jianguo Feng
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China; Department of Anesthesiology, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan Province, China
| | - Yi Liao
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China; Department of Cardiothoracic Surgery, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Xichao Xu
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China
| | - Qian Yi
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China; Department of Physiology, College of preclinical medicine,Southwest Medical University, Luzhou, Sichuan Province, China
| | - Ling He
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China
| | - Liling Tang
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China.
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671
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Hong Y, Chen H, Rao Z, Peng B, Hu H, Lin S, Xu Z. In vitro study on the role of SOX9 in trastuzumab resistance of adenocarcinoma of the esophagogastric junction. Exp Ther Med 2018; 15:3103-3107. [PMID: 29456713 DOI: 10.3892/etm.2018.5744] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Accepted: 04/21/2017] [Indexed: 12/20/2022] Open
Abstract
Trastuzumab is recommended for the treatment of human epidermal growth factor receptor 2-positive adenocarcinoma of the esophagogastric junction (AEG) in combination with chemotherapy; however, drug resistance has severely affected its clinical application. The present study aimed to investigate the effect of sex determining region Y-box 9 (SOX9), a prognostic marker in adjuvant oncological settings, on AEG cell proliferation and apoptosis in the presence or absence of trastuzumab. Furthermore, the molecular mechanism underlying the role of SOX9 in trastuzumab resistance was explored. ESO26 cells were treated with various concentrations of trastuzumab, and trastuzumab induced SOX9 expression in a concentration-dependent manner, as determined by reverse transcription-quantitative polymerase chain reaction and western blotting analyses. Transfection of ESO26 cells with SOX9 small interfering RNA was conducted to knock down SOX9 expression, and the results of MTT and flow cytometry assays demonstrated that SOX9 knockdown sensitized ESO26 cells to trastuzumab by inhibiting cell proliferation and enhancing cell apoptosis. In addition, it was observed that the trastuzumab-induced phosphorylation of AKT was suppressed by SOX9 knockdown. In conclusion, the present study demonstrated that SOX9 participated in trastuzumab resistance by affecting cell proliferation and apoptosis, and indicated that SOX9 may exert its effect on trastuzumab resistance via activation of the phosphatidylinositol-3-kinase/AKT signaling pathway. This study identified a novel mechanism underlying trastuzumab resistance in vitro and may be useful in improving the efficacy of trastuzumab treatment.
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Affiliation(s)
- Yingcai Hong
- Department of Thoracic Surgery, Second Clinical Medical College of Jinan University, Shenzhen People's Hospital, Shenzhen, Guangdong 518000, P.R. China
| | - Huaisheng Chen
- Department of Thoracic Surgery, Second Clinical Medical College of Jinan University, Shenzhen People's Hospital, Shenzhen, Guangdong 518000, P.R. China
| | - Zhanpeng Rao
- Department of Thoracic Surgery, Second Clinical Medical College of Jinan University, Shenzhen People's Hospital, Shenzhen, Guangdong 518000, P.R. China
| | - Bin Peng
- Department of Thoracic Surgery, Second Clinical Medical College of Jinan University, Shenzhen People's Hospital, Shenzhen, Guangdong 518000, P.R. China
| | - Hong Hu
- Department of Thoracic Surgery, Second Clinical Medical College of Jinan University, Shenzhen People's Hospital, Shenzhen, Guangdong 518000, P.R. China
| | - Shaolin Lin
- Department of Gastroenterology, Second Clinical Medical College of Jinan University, Shenzhen People's Hospital, Shenzhen, Guangdong 518000, P.R. China
| | - Zhenglei Xu
- Department of Gastroenterology, Second Clinical Medical College of Jinan University, Shenzhen People's Hospital, Shenzhen, Guangdong 518000, P.R. China
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Abstract
Autism spectrum disorder (ASD) is a neurodevelopmental disease which is characterized by a deficit in social interactions and communication with repetitive and restrictive behavior. In altered cells, metabolic enzymes are modified by the dysregulation of the canonical WNT/β-catenin pathway. In ASD, the canonical WNT/β-catenin pathway is upregulated. We focus this review on the hypothesis of Warburg effect stimulated by the overexpression of the canonical WNT/β-catenin pathway in ASD. Upregulation of WNT/β-catenin pathway induces aerobic glycolysis, named Warburg effect, through activation of glucose transporter (Glut), pyruvate kinase M2 (PKM2), pyruvate dehydrogenase kinase 1(PDK1), monocarboxylate lactate transporter 1 (MCT-1), lactate dehydrogenase kinase-A (LDH-A) and inactivation of pyruvate dehydrogenase complex (PDH). The aerobic glycolysis consists to a supply of a large part of glucose into lactate regardless of oxygen. Aerobic glycolysis is less efficient in terms of ATP production than oxidative phosphorylation because of the shunt of the TCA cycle. Dysregulation of energetic metabolism might promote cell deregulation and progression of ASD. Warburg effect regulation could be an attractive target for developing therapeutic interventions in ASD.
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Affiliation(s)
- Alexandre Vallée
- Laboratoire de Mathématiques et Applications (LMA), UMR CNRS 7348, CHU Poitiers, University of Poitiers, Poitiers, France
- Laboratoire de Mathématiques et Applications (LMA), UMR CNRS 7348, University of Poitiers, 11 Boulevard Marie et Pierre Curie, Poitiers, France
| | - Jean-Noël Vallée
- Laboratoire de Mathématiques et Applications (LMA), UMR CNRS 7348, University of Poitiers, 11 Boulevard Marie et Pierre Curie, Poitiers, France
- CHU Amiens Picardie, Université Picardie Jules Verne (UPJV), Amiens, France
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673
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Nguyen VT, Cancedda R, Descalzi F. Platelet lysate activates quiescent cell proliferation and reprogramming in human articular cartilage: Involvement of hypoxia inducible factor 1. J Tissue Eng Regen Med 2017; 12:e1691-e1703. [PMID: 29052350 DOI: 10.1002/term.2595] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Revised: 09/28/2017] [Accepted: 10/09/2017] [Indexed: 12/16/2022]
Abstract
The idea of rescuing the body self-repair capability lost during evolution is progressively gaining ground in regenerative medicine. In particular, growth factors and bioactive molecules derived from activated platelets emerged as promising therapeutic agents acting as trigger for repair of tissue lesions and restoration of tissue functions. Aim of this study was to assess the potential of a platelet lysate (PL) for human articular cartilage repair considering its activity on progenitor cells and differentiated chondrocytes. PL induced the re-entry in the cell cycle of confluent, growth-arrested dedifferentiated/progenitor cartilage cells. In a cartilage permissive culture environment, differentiated cells also resumed proliferation after exposure to PL. These findings correlated with an up-regulation of the proliferation/survival pathways ERKs and Akt and with an induction of cyclin D1. In short- and long-term cultures of articular cartilage explants, we observed a release of proliferating chondroprogenitors able to differentiate and form an "in vitro" tissue with properties of healthy articular cartilage. Moreover, in cultured cartilage cells, PL induced a hypoxia-inducible factor (HIF-1) alpha increase, its nuclear relocation and the binding to HIF-1 responsive elements. These events were possibly related to the cell proliferation because the HIF-1 inhibitor acriflavine inhibited HIF-1 binding to HIF-1 responsive elements and cell proliferation. Our study demonstrates that PL induces quiescent cartilage cell activation and proliferation leading to new cartilage formation, identifies PL activated pathways playing a role in these processes, and provides a rationale to the application of PL for therapeutic treatment of damaged articular cartilage.
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Affiliation(s)
- Van Thi Nguyen
- Dept. of Experimental Medicine (DIMES), University of Genova, Genova, Italy
| | - Ranieri Cancedda
- Dept. of Experimental Medicine (DIMES), University of Genova, Genova, Italy.,Biorigen Srl., Largo Rosanna Benzi 10, Genoa, Italy
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674
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Vallée A, Lecarpentier Y, Vallée JN. Thermodynamic Aspects and Reprogramming Cellular Energy Metabolism during the Fibrosis Process. Int J Mol Sci 2017; 18:ijms18122537. [PMID: 29186898 PMCID: PMC5751140 DOI: 10.3390/ijms18122537] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Revised: 11/10/2017] [Accepted: 11/21/2017] [Indexed: 01/06/2023] Open
Abstract
Fibrosis is characterized by fibroblast proliferation and fibroblast differentiation into myofibroblasts, which generate a relaxation-free contraction mechanism associated with excessive collagen synthesis in the extracellular matrix, which promotes irreversible tissue retraction evolving towards fibrosis. From a thermodynamic point of view, the mechanisms leading to fibrosis are irreversible processes that can occur through changing the entropy production rate. The thermodynamic behaviors of metabolic enzymes involved in fibrosis are modified by the dysregulation of both transforming growth factor β (TGF-β) signaling and the canonical WNT/β-catenin pathway, leading to aerobic glycolysis, called the Warburg effect. Molecular signaling pathways leading to fibrosis are considered dissipative structures that exchange energy or matter with their environment far from the thermodynamic equilibrium. The myofibroblastic cells arise from exergonic processes by switching the core metabolism from oxidative phosphorylation to glycolysis, which generates energy and reprograms cellular energy metabolism to induce the process of myofibroblast differentiation. Circadian rhythms are far-from-equilibrium thermodynamic processes. They directly participate in regulating the TGF-β and WNT/β-catenin pathways involved in energetic dysregulation and enabling fibrosis. The present review focusses on the thermodynamic implications of the reprogramming of cellular energy metabolism, leading to fibroblast differentiation into myofibroblasts through the positive interplay between TGF-β and WNT/β-catenin pathways underlying in fibrosis.
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Affiliation(s)
- Alexandre Vallée
- Laboratory of Mathematics and Applications (LMA), DACTIM, UMR CNRS 7348, CHU de Poitiers and University of Poitiers, 86021 Poitiers, France.
| | - Yves Lecarpentier
- Centre de Recherche Clinique, Grand Hôpital de l'Est Francilien (GHEF), 77100 Meaux, France.
| | - Jean-Noël Vallée
- Laboratory of Mathematics and Applications (LMA), DACTIM, UMR CNRS 7348, CHU de Poitiers and University of Poitiers, 86021 Poitiers, France.
- CHU Amiens Picardie, University of Picardie Jules Verne (UPJV), 80025 Amiens, France.
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675
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Zhang B, Liu Y, Li Y, Zhe X, Zhang S, Zhang L. Neuroglobin promotes the proliferation and suppresses the apoptosis of glioma cells by activating the PI3K/AKT pathway. Mol Med Rep 2017; 17:2757-2763. [PMID: 29207186 DOI: 10.3892/mmr.2017.8132] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Accepted: 10/20/2017] [Indexed: 11/06/2022] Open
Abstract
Our previous study demonstrated that neuroglobin (Ngb) functions as an independent predictive indicator of the prognosis of patients with glioma and promotes cancer cell growth by suppressing apoptosis. However, the understanding of the mechanisms underlying the survival‑enhancing function of Ngb in glioma is limited. In the present study, KEGG PathwayFinder by gene correlation analysis was performed on the R2: Genomics Analysis and Visualization Platform, which revealed a high association between Ngb and the phosphatidylinositol 3‑kinase (PI3K)/AKT pathway using glioma data (GSE4290) from the Gene Expression Omnibus database. Furthermore, western blotting experiments were performed in U251 and U87 glioma cells, and Ngb knockdown using short hairpin RNA reduced the protein levels of phosphorylated (p)‑AKT, p‑mammalian target of rapamycin (mTOR) and antiapoptotic factor Bcl‑2, and increased the expression of the proapoptotic protein Bcl‑2‑associated X, in U251 cells. In addition, Ngb overexpression promoted the activation of the PI3K/AKT pathway in U87 cells. MK2206, a PI3K/AKT signaling inhibitor, reduced the expression of p‑AKT and increased the levels of apoptosis‑associated proteins, including cleaved poly(ADP‑ribose) polymerase 1 and cleaved caspase‑3/7/8, in Ngb‑overexpressing U87 cells. Furthermore, MK2206 treatment reduced the proliferation and induced the apoptosis of Ngb‑overexpressing U87 cells, as indicated by the results of MTT, colony formation and flow cytometry assays. In addition, insulin‑like growth factor‑1, a PI3K/AKT signaling activator, reversed Ngb knockdown‑induced growth arrest and apoptosis in U251 cells. In conclusion, the results of the present study indicate that Ngb may facilitate a malignant phenotype of glioma cells by activating the PI3K/AKT pathway.
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Affiliation(s)
- Bei Zhang
- Department of Neurology, The First Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi 710077, P.R. China
| | - Yong Liu
- Institute of Neurobiology, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, P.R. China
| | - Yajun Li
- Department of Neurology, The First Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi 710077, P.R. China
| | - Xiao Zhe
- Department of Neurology, The First Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi 710077, P.R. China
| | - Shijun Zhang
- Department of Neurology, The First Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi 710077, P.R. China
| | - Lei Zhang
- Department of Neurology, The First Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi 710077, P.R. China
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676
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Wang H, Ran LW, Hui K, Wang XY, Zheng Y. [Expressions of survivin, PI3K and AKT in keratinocytes in skin lesions and their pathogenic role in psoriasis vulgaris]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2017; 37:1512-1516. [PMID: 29180333 PMCID: PMC6779652 DOI: 10.3969/j.issn.1673-4254.2017.11.14] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Indexed: 06/07/2023]
Abstract
OBJECTIVE To explore the role of survivin and PI3K/AKT pathway in the pathogenesis of psoriasis vulgaris (PV). METHODS Plaque-like lesions collected from 22 patients with PV in progressive stage and 18 normal control skin specimens were examined using immunohistochemical staining, Western blotting and real-time quantitative PCR for expressions of survivin, PI3K and AKT in the keratinocytes, and their correlation was analyzed. A small interfering RNA (siRNA) was used to knock down AKT in cultured HaCaT cells, and Western blotting was used to detect the changes in the expression of survivin. RESULTS Compared with normal skin, PV lesions showed obviously up-regulated expressions of survivin, PI3K and AKT in the keratinocytes. Survivin expression was positively correlated with PI3K (r=0.4510, P=0.0351) and AKT (r=0.4423, P=0.0393) in the keratinocytes in PV lesions. In cultured HaCaT cells, siRNA-mediated knockdown of AKT caused down-regulation of survivin expression. CONCLUSION Survivin and PI3K/AKT signaling pathway may participate in the occurrence and progression of PV.
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Affiliation(s)
- Hao Wang
- Department of Dermatology, Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, China. E-mail:
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677
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Tatapudy S, Aloisio F, Barber D, Nystul T. Cell fate decisions: emerging roles for metabolic signals and cell morphology. EMBO Rep 2017; 18:2105-2118. [PMID: 29158350 DOI: 10.15252/embr.201744816] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Revised: 09/14/2017] [Accepted: 10/24/2017] [Indexed: 12/25/2022] Open
Abstract
Understanding how cell fate decisions are regulated is a fundamental goal of developmental and stem cell biology. Most studies on the control of cell fate decisions address the contributions of changes in transcriptional programming, epigenetic modifications, and biochemical differentiation cues. However, recent studies have found that other aspects of cell biology also make important contributions to regulating cell fate decisions. These cues can have a permissive or instructive role and are integrated into the larger network of signaling, functioning both upstream and downstream of developmental signaling pathways. Here, we summarize recent insights into how cell fate decisions are influenced by four aspects of cell biology: metabolism, reactive oxygen species (ROS), intracellular pH (pHi), and cell morphology. For each topic, we discuss how these cell biological cues interact with each other and with protein-based mechanisms for changing gene transcription. In addition, we highlight several questions that remain unanswered in these exciting and relatively new areas of the field.
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Affiliation(s)
- Sumitra Tatapudy
- Departments of Anatomy and OB-GYN/RS, University of California, San Francisco, San Francisco, CA, USA
| | - Francesca Aloisio
- Department of Cell and Tissue Biology, University of California, San Francisco, San Francisco, CA, USA
| | - Diane Barber
- Department of Cell and Tissue Biology, University of California, San Francisco, San Francisco, CA, USA
| | - Todd Nystul
- Departments of Anatomy and OB-GYN/RS, University of California, San Francisco, San Francisco, CA, USA
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678
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Baker PR, Patinkin Z, Shapiro AL, De La Houssaye BA, Woontner M, Boyle KE, Vanderlinden L, Dabelea D, Friedman JE. Maternal obesity and increased neonatal adiposity correspond with altered infant mesenchymal stem cell metabolism. JCI Insight 2017; 2:94200. [PMID: 29093265 DOI: 10.1172/jci.insight.94200] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Accepted: 09/26/2017] [Indexed: 12/18/2022] Open
Abstract
Maternal obesity is a global health problem that increases offspring obesity risk. The metabolic pathways underlying early developmental programming in human infants at risk for obesity remain poorly understood, largely due to barriers in fetal/infant tissue sampling. Utilizing umbilical cord-derived mesenchymal stem cells (uMSC) from offspring of normal weight and obese mothers, we tested whether energy metabolism and gene expression differ in differentiating uMSC myocytes and adipocytes, in relation to maternal obesity exposures and/or neonatal adiposity. Biomarkers of incomplete β-oxidation were uniquely positively correlated with infant adiposity and maternal lipid levels in uMSC myocytes from offspring of obese mothers only. Metabolic and biosynthetic processes were enriched in differential gene expression analysis related to maternal obesity. In uMSC adipocytes, maternal obesity and lipids were associated with downregulation in multiple insulin-dependent energy-sensing pathways including PI3K and AMPK. Maternal lipids correlated with uMSC adipocyte upregulation of the mitochondrial respiratory chain but downregulation of mitochondrial biogenesis. Overall, our data revealed cell-specific alterations in metabolism and gene expression that correlated with maternal obesity and adiposity of their offspring, suggesting tissue-specific metabolic and regulatory changes in these newborn cells. We provide important insight into potential developmental programming mechanisms of increased obesity risk in offspring of obese mothers.
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Affiliation(s)
- Peter R Baker
- Department of Pediatrics, University of Colorado, Aurora, Colorado, USA
| | - Zachary Patinkin
- Department of Pediatrics, University of Colorado, Aurora, Colorado, USA
| | - Allison Lb Shapiro
- Department of Epidemiology, Colorado School of Public Health, Aurora, Colorado, USA
| | | | - Michael Woontner
- Department of Pediatrics, University of Colorado, Aurora, Colorado, USA
| | - Kristen E Boyle
- Department of Pediatrics, University of Colorado, Aurora, Colorado, USA
| | | | - Dana Dabelea
- Department of Epidemiology, Colorado School of Public Health, Aurora, Colorado, USA
| | - Jacob E Friedman
- Department of Pediatrics, University of Colorado, Aurora, Colorado, USA
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679
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Abstract
PURPOSE OF REVIEW Human pluripotent stem cells (hPSCs) are anchorage-dependent cells that can be cultured on a variety of matrices and express integrins and the machinery for integrin signaling. Until recently, there has been limited understanding of exactly how integrin signaling regulates pluripotent stem cell (PSC) behavior. This review summarizes our knowledge of how integrins and focal adhesion kinase (FAK) regulate different aspects of hPSC biology. RECENT FINDINGS The latest research suggests that mouse and human embryonic stem cells utilize similar integrin signaling players but with different biological outcomes, reflecting the known developmental difference in their pluripotent status. Notably, attachment cues via FAK signaling are crucial for hPSCs survival and pluripotency maintenance. FAK may be found cortically but also in the nucleus of hPSCs intersecting core pluripotency networks. SUMMARY Integrins and FAK have been consigned to the conventional role of cell adhesion receptor systems in PSCs. This review highlights data indicating that they are firmly integrated in pluripotency circuits, with implications for both research PSC culture and scale up and use in clinical applications.
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Affiliation(s)
- Loriana Vitillo
- Division of Cell Matrix Biology and Regenerative Medicine, Faculty of Biology Medicine and Health, University of Manchester, Michael Smith Building, Oxford Rd, Manchester, M13 9PT UK
| | - Susan J. Kimber
- Division of Cell Matrix Biology and Regenerative Medicine, Faculty of Biology Medicine and Health, University of Manchester, Michael Smith Building, Oxford Rd, Manchester, M13 9PT UK
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680
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Yan X, Qi M, Li P, Zhan Y, Shao H. Apigenin in cancer therapy: anti-cancer effects and mechanisms of action. Cell Biosci 2017; 7:50. [PMID: 29034071 PMCID: PMC5629766 DOI: 10.1186/s13578-017-0179-x] [Citation(s) in RCA: 296] [Impact Index Per Article: 42.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Accepted: 09/28/2017] [Indexed: 12/17/2022] Open
Abstract
Apigenin is a common dietary flavonoid that is abundantly present in many fruits, vegetables and Chinese medicinal herbs and serves multiple physiological functions, such as strong anti-inflammatory, antioxidant, antibacterial and antiviral activities and blood pressure reduction. Therefore, apigenin has been used as a traditional medicine for centuries. Recently, apigenin has been widely investigated for its anti-cancer activities and low toxicity. Apigenin was reported to suppress various human cancers in vitro and in vivo by multiple biological effects, such as triggering cell apoptosis and autophagy, inducing cell cycle arrest, suppressing cell migration and invasion, and stimulating an immune response. In this review, we focus on the most recent advances in the anti-cancer effects of apigenin and their underlying mechanisms, and we summarize the signaling pathways modulated by apigenin, including the PI3K/AKT, MAPK/ERK, JAK/STAT, NF-κB and Wnt/β-catenin pathways. We also discuss combinatorial strategies to enhance the anti-cancer effect of apigenin on various cancers and its use as an adjuvant chemotherapeutic agent to overcome cancer drug resistance or to alleviate other adverse effects of chemotherapy. The functions of apigenin against cancer stem cells are also summarized and discussed. These data demonstrate that apigenin is a promising reagent for cancer therapy. Apigenin appears to have the potential to be developed either as a dietary supplement or as an adjuvant chemotherapeutic agent for cancer therapy.
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Affiliation(s)
- Xiaohui Yan
- Key Laboratory of the Ministry of Education for Medicinal Plant Resources and Natural Pharmaceutical Chemistry, College of Life Science, Shaanxi Normal University, Xi'an, 710119 China
| | - Miao Qi
- Key Laboratory of the Ministry of Education for Medicinal Plant Resources and Natural Pharmaceutical Chemistry, College of Life Science, Shaanxi Normal University, Xi'an, 710119 China
| | - Pengfei Li
- Key Laboratory of the Ministry of Education for Medicinal Plant Resources and Natural Pharmaceutical Chemistry, College of Life Science, Shaanxi Normal University, Xi'an, 710119 China
| | - Yihong Zhan
- Key Laboratory of the Ministry of Education for Medicinal Plant Resources and Natural Pharmaceutical Chemistry, College of Life Science, Shaanxi Normal University, Xi'an, 710119 China
| | - Huanjie Shao
- Key Laboratory of the Ministry of Education for Medicinal Plant Resources and Natural Pharmaceutical Chemistry, College of Life Science, Shaanxi Normal University, Xi'an, 710119 China
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681
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Gugliandolo A, Diomede F, Cardelli P, Bramanti A, Scionti D, Bramanti P, Trubiani O, Mazzon E. Transcriptomic analysis of gingival mesenchymal stem cells cultured on 3D bioprinted scaffold: A promising strategy for neuroregeneration. J Biomed Mater Res A 2017; 106:126-137. [PMID: 28879677 DOI: 10.1002/jbm.a.36213] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Revised: 08/02/2017] [Accepted: 08/22/2017] [Indexed: 01/01/2023]
Abstract
The combined approach of mesenchymal stem cells (MSCs) and scaffolds has been proposed as a potential therapeutic tool for the treatment of neurodegenerative diseases. Indeed, even if MSCs can promote neuronal regeneration, replacing lost neurons or secreting neurotrophic factors, many limitations still exist for their application in regenerative medicine, including the low survival and differentiation rate. The scaffolds, by mimicking the endogenous microenvironment, have shown to promote cell survival, proliferation, and differentiation. In this work, gingival mesenchymal stem cells (GMSCs), isolated from healthy donors, were expanded in vitro, by culturing them adherent in plastic dishes (CTR-GMSCs) or on a poly(lactic acid) scaffold (SC-GMSCs). In order to evaluate the survival and the neurogenic differentiation potential, we performed a comparative transcriptomic analysis between CTR-GMSCs and SC-GMSCs by next generation sequencing. We found that SC-GMSCs showed an increased expression of neurogenic and prosurvival genes. In particular, genes involved in neurotrophin signaling and PI3K/Akt pathways were upregulated. On the contrary, proapoptotic and negative regulator of neuronal growth genes were downregulated. Moreover, nestin and GAP-43 protein levels increased in SC-GMSCs, confirming the neurogenic commitment of these cells. In conclusion, the scaffold, providing a trophic support for MSCs, may promote GMSCs differentiation toward a neuronal phenotype and survival. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A: 126-137, 2018.
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Affiliation(s)
- Agnese Gugliandolo
- IRCCS Centro Neurolesi "Bonino-Pulejo," Via Provinciale Palermo, Contrada Casazza, 98124 Messina, Italy
| | - Francesca Diomede
- Stem Cells and Regenerative Medicine Laboratory, Department of Medical, Oral and Biotechnological Sciences, University "G. D'Annunzio," Chieti-Pescara, via dei Vestini, 31, 66100, Chieti, Italy
| | - Paolo Cardelli
- Stem Cells and Regenerative Medicine Laboratory, Department of Medical, Oral and Biotechnological Sciences, University "G. D'Annunzio," Chieti-Pescara, via dei Vestini, 31, 66100, Chieti, Italy
| | - Alessia Bramanti
- IRCCS Centro Neurolesi "Bonino-Pulejo," Via Provinciale Palermo, Contrada Casazza, 98124 Messina, Italy.,Institute of Applied Science and Intelligent Systems "ISASI Eduardo Caianiello,", National Research Council of Italy, Messina, Italy
| | - Domenico Scionti
- IRCCS Centro Neurolesi "Bonino-Pulejo," Via Provinciale Palermo, Contrada Casazza, 98124 Messina, Italy
| | - Placido Bramanti
- IRCCS Centro Neurolesi "Bonino-Pulejo," Via Provinciale Palermo, Contrada Casazza, 98124 Messina, Italy
| | - Oriana Trubiani
- Stem Cells and Regenerative Medicine Laboratory, Department of Medical, Oral and Biotechnological Sciences, University "G. D'Annunzio," Chieti-Pescara, via dei Vestini, 31, 66100, Chieti, Italy
| | - Emanuela Mazzon
- IRCCS Centro Neurolesi "Bonino-Pulejo," Via Provinciale Palermo, Contrada Casazza, 98124 Messina, Italy
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682
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Vallée A, Lecarpentier Y, Guillevin R, Vallée JN. Interactions between TGF-β1, canonical WNT/β-catenin pathway and PPAR γ in radiation-induced fibrosis. Oncotarget 2017; 8:90579-90604. [PMID: 29163854 PMCID: PMC5685775 DOI: 10.18632/oncotarget.21234] [Citation(s) in RCA: 123] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Accepted: 08/17/2017] [Indexed: 12/16/2022] Open
Abstract
Radiation therapy induces DNA damage and inflammation leading to fibrosis. Fibrosis can occur 4 to 12 months after radiation therapy. This process worsens with time and years. Radiation-induced fibrosis is characterized by fibroblasts proliferation, myofibroblast differentiation, and synthesis of collagen, proteoglycans and extracellular matrix. Myofibroblasts are non-muscle cells that can contract and relax. Myofibroblasts evolve towards irreversible retraction during fibrosis process. In this review, we discussed the interplays between transforming growth factor-β1 (TGF-β1), canonical WNT/β-catenin pathway and peroxisome proliferator-activated receptor gamma (PPAR γ) in regulating the molecular mechanisms underlying the radiation-induced fibrosis, and the potential role of PPAR γ agonists. Overexpression of TGF-β and canonical WNT/β-catenin pathway stimulate fibroblasts accumulation and myofibroblast differentiation whereas PPAR γ expression decreases due to the opposite interplay of canonical WNT/β-catenin pathway. Both TGF-β1 and canonical WNT/β-catenin pathway stimulate each other through the Smad pathway and non-Smad pathways such as phosphatidylinositol 3-kinase/serine/threonine kinase (PI3K/Akt) signaling. WNT/β-catenin pathway and PPAR γ interact in an opposite manner. PPAR γ agonists decrease β-catenin levels through activation of inhibitors of the WNT pathway such as Smad7, glycogen synthase kinase-3 (GSK-3 β) and dickkopf-related protein 1 (DKK1). PPAR γ agonists also stimulate phosphatase and tensin homolog (PTEN) expression, which decreases both TGF-β1 and PI3K/Akt pathways. PPAR γ agonists by activating Smad7 decrease Smads pathway and then TGF-β signaling leading to decrease radiation-induced fibrosis. TGF-β1 and canonical WNT/β-catenin pathway promote radiation-induced fibrosis whereas PPAR γ agonists can prevent radiation-induced fibrosis.
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Affiliation(s)
- Alexandre Vallée
- Experimental and Clinical Neurosciences Laboratory, INSERM U1084, University of Poitiers, Poitiers, France.,Laboratory of Mathematics and Applications (LMA), UMR CNRS 7348, University of Poitiers, Poitiers, France
| | - Yves Lecarpentier
- Centre de Recherche Clinique, Grand Hôpital de l'Est Francilien (GHEF), Meaux, France
| | - Rémy Guillevin
- DACTIM, UMR CNRS 7348, University of Poitiers et CHU de Poitiers, Poitiers, France
| | - Jean-Noël Vallée
- Laboratory of Mathematics and Applications (LMA), UMR CNRS 7348, University of Poitiers, Poitiers, France.,CHU Amiens Picardie, University of Picardie Jules Verne (UPJV), Amiens, France
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683
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Interactions Between the Canonical WNT/Beta-Catenin Pathway and PPAR Gamma on Neuroinflammation, Demyelination, and Remyelination in Multiple Sclerosis. Cell Mol Neurobiol 2017; 38:783-795. [DOI: 10.1007/s10571-017-0550-9] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Accepted: 09/09/2017] [Indexed: 12/13/2022]
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684
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Zhang M, Chen D, Zhen Z, Ao J, Yuan X, Gao X. Annexin A2 positively regulates milk synthesis and proliferation of bovine mammary epithelial cells through the mTOR signaling pathway. J Cell Physiol 2017; 233:2464-2475. [DOI: 10.1002/jcp.26123] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Accepted: 08/01/2017] [Indexed: 12/22/2022]
Affiliation(s)
- Minghui Zhang
- The Key Laboratory of Dairy Science of Education Ministry; Northeast Agricultural University; Heilongjiang Province China
| | - Dongying Chen
- The Key Laboratory of Dairy Science of Education Ministry; Northeast Agricultural University; Heilongjiang Province China
| | - Zhen Zhen
- The Key Laboratory of Dairy Science of Education Ministry; Northeast Agricultural University; Heilongjiang Province China
| | - Jinxia Ao
- The Key Laboratory of Dairy Science of Education Ministry; Northeast Agricultural University; Heilongjiang Province China
| | - Xiaohan Yuan
- The Key Laboratory of Dairy Science of Education Ministry; Northeast Agricultural University; Heilongjiang Province China
| | - Xuejun Gao
- The Key Laboratory of Dairy Science of Education Ministry; Northeast Agricultural University; Heilongjiang Province China
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685
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DR1 activation reduces the proliferation of vascular smooth muscle cells by JNK/c-Jun dependent increasing of Prx3. Mol Cell Biochem 2017; 440:157-165. [DOI: 10.1007/s11010-017-3164-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2017] [Accepted: 08/16/2017] [Indexed: 12/29/2022]
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686
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刘 畅, 罗 英, 朴 仙, 王 玥, 孟 令, 王 浩, 王 加, 张 翼, 李 金, 金 成. [Quinalizarin induces apoptosis in gastric cancer AGS cells via MAPK and Akt signaling pathway]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2017; 37:1085-1091. [PMID: 28801290 PMCID: PMC6765738 DOI: 10.3969/j.issn.1673-4254.2017.08.14] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Indexed: 06/07/2023]
Abstract
OBJECTIVE To investigate quinalizarin-induced apoptosis in gastric cancer cells in vitro and explore the molecular mechanisms. METHODS MTT assay was used to determine the cytotoxic effects of quinalizarin on human gastric cancer AGS, MKN-28 and MKN-45 cells. Annexin V-FITC/PI staining and flow cytometry were used to assess quinalizarin-induced apoptosis in AGS cells and its effect on intracellular ROS levels; the expression levels of apoptotic proteins in the cells were determined with Western blotting. RESULTS Quinalizarin dose-dependently reduced the cell viabilities of the 3 gastric cancer cells (P<0.05). The IC50 values of quinalizarin in AGS, MKN-28 and MKN-45 cells were 7.07 µmol/L, 22.55 µmol/L and 14.18 µmol/L, respectively. Quinalizarin time-dependently induced apoptosis of AGS cells and potentiated the generation of intracellular reactive oxygen species (ROS) levels. Pretreatment with NAC, a scavenger of ROS, inhibited quinalizarin-induced apoptosis (P<0.001). Western blotting results showed that quinalizarin also up-regulated the expression levels of the apoptotic proteins including p-p38, p-JNK, Bad, cleaved caspase-3, and cleaved PARP-1 (P<0.05), and down-regulated the expression of the anti-apoptotic proteins p-Akt, p-ERK, and Bcl-2 (P<0.05). CONCLUSION Quinalizarin inhibits the proliferation and induces apoptosis in gastric cancer cells in vitro through regulating intracellular ROS levels via the MAPK and Akt signaling pathways.
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Affiliation(s)
- 畅 刘
- 黑龙江八一农垦大学生命科学技术学院, 黑龙江 大庆 163319College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, China
| | - 英花 罗
- 黑龙江八一农垦大学动物科学技术学院, 黑龙江 大庆 163319College of Animal Science & Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing 163319, China
| | - 仙姬 朴
- 哈尔滨医科大学第五医院, 黑龙江 大庆 163316Department of gynecology and obstetrics, The Fifth Affiliated Hospital of Harbin Medical university, Daqing 163316, China
| | - 玥 王
- 黑龙江八一农垦大学生命科学技术学院, 黑龙江 大庆 163319College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, China
| | - 令旗 孟
- 黑龙江八一农垦大学生命科学技术学院, 黑龙江 大庆 163319College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, China
| | - 浩 王
- 黑龙江八一农垦大学生命科学技术学院, 黑龙江 大庆 163319College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, China
| | - 加茹 王
- 黑龙江八一农垦大学生命科学技术学院, 黑龙江 大庆 163319College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, China
| | - 翼 张
- 黑龙江八一农垦大学生命科学技术学院, 黑龙江 大庆 163319College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, China
| | - 金钱 李
- 黑龙江八一农垦大学生命科学技术学院, 黑龙江 大庆 163319College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, China
| | - 成浩 金
- 黑龙江八一农垦大学生命科学技术学院, 黑龙江 大庆 163319College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, China
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687
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A Kinome RNAi Screen in Drosophila Identifies Novel Genes Interacting with Lgl, aPKC, and Crb Cell Polarity Genes in Epithelial Tissues. G3-GENES GENOMES GENETICS 2017; 7:2497-2509. [PMID: 28611255 PMCID: PMC5555457 DOI: 10.1534/g3.117.043513] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
In both Drosophila melanogaster and mammalian systems, epithelial structure and underlying cell polarity are essential for proper tissue morphogenesis and organ growth. Cell polarity interfaces with multiple cellular processes that are regulated by the phosphorylation status of large protein networks. To gain insight into the molecular mechanisms that coordinate cell polarity with tissue growth, we screened a boutique collection of RNAi stocks targeting the kinome for their capacity to modify Drosophila “cell polarity” eye and wing phenotypes. Initially, we identified kinase or phosphatase genes whose depletion modified adult eye phenotypes associated with the manipulation of cell polarity complexes (via overexpression of Crb or aPKC). We next conducted a secondary screen to test whether these cell polarity modifiers altered tissue overgrowth associated with depletion of Lgl in the wing. These screens identified Hippo, Jun kinase (JNK), and Notch signaling pathways, previously linked to cell polarity regulation of tissue growth. Furthermore, novel pathways not previously connected to cell polarity regulation of tissue growth were identified, including Wingless (Wg/Wnt), Ras, and lipid/Phospho-inositol-3-kinase (PI3K) signaling pathways. Additionally, we demonstrated that the “nutrient sensing” kinases Salt Inducible Kinase 2 and 3 (SIK2 and 3) are potent modifiers of cell polarity phenotypes and regulators of tissue growth. Overall, our screen has revealed novel cell polarity-interacting kinases and phosphatases that affect tissue growth, providing a platform for investigating molecular mechanisms coordinating cell polarity and tissue growth during development.
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688
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Cahill TJ, Choudhury RP, Riley PR. Heart regeneration and repair after myocardial infarction: translational opportunities for novel therapeutics. Nat Rev Drug Discov 2017; 16:699-717. [DOI: 10.1038/nrd.2017.106] [Citation(s) in RCA: 182] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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689
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Nagai K, Tominaga T, Ueda S, Shibata E, Tamaki M, Matsuura M, Kishi S, Murakami T, Moriya T, Abe H, Doi T. Mesangial Cell Mammalian Target of Rapamycin Complex 1 Activation Results in Mesangial Expansion. J Am Soc Nephrol 2017; 28:2879-2885. [PMID: 28701517 DOI: 10.1681/asn.2016111196] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Accepted: 06/02/2017] [Indexed: 02/05/2023] Open
Abstract
Human glomerular diseases can be caused by several different diseases, many of which include mesangial expansion and/or proliferation followed by glomerulosclerosis. However, molecular mechanisms underlying the pathologic mesangial changes remain poorly understood. Here, we investigated the role of the mammalian target of rapamycin complex 1 (mTORC1)-S6 kinase pathway in mesangial expansion and/or proliferation by ablating an upstream negative regulator, tuberous sclerosis complex 1 (TSC1), using tamoxifen-induced Foxd1-Cre mice [Foxd1ER(+) TSC1 mice]. Foxd1ER(+) TSC1 mice showed mesangial expansion with increased production of collagen IV, collagen I, and α-smooth muscle actin in glomeruli, but did not exhibit significant mesangial proliferation or albuminuria. Furthermore, rapamycin treatment of Foxd1ER(+) TSC1 mice suppressed mesangial expansion. Among biopsy specimens from patients with glomerular diseases, analysis of phosphorylated ribosomal protein S6 revealed mesangial cell mTORC1 activation in IgA nephropathy and in lupus mesangial proliferative nephritis but not in the early phase of diabetic nephropathy. In summary, mesangial cell mTORC1 activation can cause mesangial expansion and has clinical relevance for human glomerular diseases. This report also confirms that the tamoxifen-induced mesangium-specific Cre-loxP system is useful for studies designed to clarify the role of the mesangium in glomerular diseases in adults.
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Affiliation(s)
- Kojiro Nagai
- Department of Nephrology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan; and
| | - Tatsuya Tominaga
- Department of Nephrology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan; and
| | - Sayo Ueda
- Department of Nephrology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan; and
| | - Eriko Shibata
- Department of Nephrology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan; and
| | - Masanori Tamaki
- Department of Nephrology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan; and
| | - Motokazu Matsuura
- Department of Nephrology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan; and
| | - Seiji Kishi
- Department of Nephrology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan; and
| | - Taichi Murakami
- Department of Nephrology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan; and
| | - Tatsumi Moriya
- Health Care Center, Kitasato University, Sagamihara, Kanagawa, Japan
| | - Hideharu Abe
- Department of Nephrology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan; and
| | - Toshio Doi
- Department of Nephrology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan; and
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690
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Li Y, Ma X, Wang Y, Li G. miR-489 inhibits proliferation, cell cycle progression and induces apoptosis of glioma cells via targeting SPIN1-mediated PI3K/AKT pathway. Biomed Pharmacother 2017; 93:435-443. [PMID: 28666210 DOI: 10.1016/j.biopha.2017.06.058] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 06/12/2017] [Accepted: 06/19/2017] [Indexed: 01/06/2023] Open
Abstract
microRNA-489 (miR-489), a newly identified tumor-related miRNA, functions as an oncogene or tumor suppressor via regulating growth and metastasis of human cancers. But, the clinical significance, biological function and underlying mechanisms of miR-489 in glioma remain rarely known. Here, we showed that the levels of miR-489 in glioma tissues were notably underexpressed compared to corresponding non-tumor tissues. In accordance, the relative levels of miR-489 were decreased in glioma cell lines compared with NHA cells. Kaplan-Meier plots indicated that miR-489 low expressing glioma patients showed a prominent shorter overall survival. In addition, miR-489 overexpression prohibited proliferation and cell cycle progression, and promoted apoptosis in U251 cells. While, miR-489 knockdown showed opposite effects on these cellular processes of U87 cells. In vivo experiments demonstrated that miR-489 restoration reduced the tumor volume and weight of subcutaneous glioma xenografts in nude mice. Notably, Spindlin 1 (SPIN1) was inversely and directly regulated by miR-489 in glioma cells. A negative correlation between the expression of miR-489 and SPIN1 mRNA was confirmed in glioma tissues. Interestingly, miR-489 inversely modulated activation of PI3K/AKT pathway and expression of downstream targets including p-mTOR, Cyclin D1 and BCL-XL. SPIN1 re-expression abolished the effects of miR-489 on U251 cells with enhanced activation of PI3K/AKT pathway and malignant phenotype. Meanwhile, AKT inhibitor MK-2206 blocked activation of PI3K/AKT pathway and resulted in reduced proliferation, cell cycle arrest and increased apoptosis in miR-489 down-regulating U87 cells. Altogether, our data support that miR-489 loss facilitates malignant phenotype of glioma cells probably via SPIN1-mediated PI3K/AKT pathway.
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Affiliation(s)
- Yan Li
- Department of Neurology, The Third Hospital of Jinan, Jinan, Shandong Province 250132, China.
| | - Xiaolin Ma
- Department of Neurology, The Third Hospital of Jinan, Jinan, Shandong Province 250132, China
| | - Yanpeng Wang
- Department of Pharmacy, The Third Hospital of Jinan, Jinan, Shandong Province 250132, China
| | - Guohua Li
- Department of Neurology, The Third Hospital of Jinan, Jinan, Shandong Province 250132, China
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691
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Wang H, Tao L, Ni T, Gu H, Jin F, Dai X, Feng J, Ding Y, Xiao W, Guo S, Hisamitsu T, Qian Y, Liu Y. Anticancer efficacy of the ethyl acetate extract from the traditional Chinese medicine herb Celastrus orbiculatus against human gastric cancer. JOURNAL OF ETHNOPHARMACOLOGY 2017; 205:147-157. [PMID: 28476678 DOI: 10.1016/j.jep.2017.04.030] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 04/27/2017] [Accepted: 04/29/2017] [Indexed: 06/07/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The traditional Chinese medicine (TCM) herb Celastrus orbiculatus is an important folk medicinal plant in China that has been used as an anti-inflammatory, antitumor, and analgesic in various diseases. The ethyl acetate extract of C. orbiculatus (C. orbiculatus extract, COE) was reported to show significant antitumor effects. However, no study in China or abroad has reported the effect and mechanism of COE in triggering apoptosis of gastric cancer (GC) cells. AIM OF STUDY To further uncover the molecular mechanism underlying COE's apoptotic and anti-proliferative effects and lay a foundation for the development of novel, effective antitumor TCM agents. MATERIALS AND METHODS The effect of COE on AGS and BGC-823 GC cell viability was examined using a 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Apoptosis of AGS and BGC-823 cells induced by COE was analyzed using flow cytometry and a mitochondrial membrane potential assay kit (JC-1). The proliferating GC cells were identified and examined using a 5-bromo-2'-deoxyuridine (BrdU) staining kit and flow cytometric analysis. A western blot assay was used to detect the effect of COE on apoptosis-related proteins, B-cell lymphoma-2 (Bcl-2), Bcl-extra-large (Bcl-xL), Bcl-2-like protein 12 (Bcl-L12), Bcl-2-associated X protein (Bax), and caspase as well as proliferation-related proteins, phosphoinositide 3-kinase (PI3K)/Akt/mechanistic target of rapamycin (mTOR)/p70s6k. Transmission electron microscopy (TEM) and an animal imaging technique were used to evaluate the microstructure of apoptotic GC cells and the effect of COE on tumor cell growth in vivo, respectively. RESULTS The results indicate that COE significantly inhibited proliferation and induced apoptosis of GC AGS and BGC-823 cell lines both in vivo and in vitro. COE significantly decreased the cell mitochondrial membrane potential. Moreover, COE downregulated the levels of Bcl-2, Bcl-xL, and PI3K/Akt/mTOR/p70s6k while those of Bax and caspase were upregulated. More interestingly, COE altered the microstructure of the mitochondria. CONCLUSION All these data collectively indicate that COE not only has significant antiproliferative effects but also has both in vivo and in vitro apoptotic effects. In addition, COE altered the structure and function of the mitochondria, which is another potential pathway for the antitumor activity of COE. These findings may provide a basis for the development of new anticancer TCM candidates.
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Affiliation(s)
- Haibo Wang
- The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou 225000, China; The State Administration of Traditional Chinese Medicine Key Laboratory of Toxic Pathogens-Based Therapeutic Approaches of Gastric Cancer, Yangzhou 225000, China; Clinical Medicine College of Yangzhou University, Yangzhou 225000, China.
| | - Lide Tao
- The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou 225000, China; The State Administration of Traditional Chinese Medicine Key Laboratory of Toxic Pathogens-Based Therapeutic Approaches of Gastric Cancer, Yangzhou 225000, China.
| | - Tengyang Ni
- The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou 225000, China; The State Administration of Traditional Chinese Medicine Key Laboratory of Toxic Pathogens-Based Therapeutic Approaches of Gastric Cancer, Yangzhou 225000, China; Clinical Medicine College of Yangzhou University, Yangzhou 225000, China.
| | - Hao Gu
- The State Administration of Traditional Chinese Medicine Key Laboratory of Toxic Pathogens-Based Therapeutic Approaches of Gastric Cancer, Yangzhou 225000, China; Clinical Medicine College of Yangzhou University, Yangzhou 225000, China.
| | - Feng Jin
- The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou 225000, China; The State Administration of Traditional Chinese Medicine Key Laboratory of Toxic Pathogens-Based Therapeutic Approaches of Gastric Cancer, Yangzhou 225000, China; Clinical Medicine College of Yangzhou University, Yangzhou 225000, China.
| | - Xiaojun Dai
- The State Administration of Traditional Chinese Medicine Key Laboratory of Toxic Pathogens-Based Therapeutic Approaches of Gastric Cancer, Yangzhou 225000, China; Clinical Medicine College of Yangzhou University, Yangzhou 225000, China.
| | - Jun Feng
- The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou 225000, China; The State Administration of Traditional Chinese Medicine Key Laboratory of Toxic Pathogens-Based Therapeutic Approaches of Gastric Cancer, Yangzhou 225000, China; Clinical Medicine College of Yangzhou University, Yangzhou 225000, China.
| | - Yanbing Ding
- The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou 225000, China.
| | - Weiming Xiao
- The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou 225000, China.
| | - Shiyu Guo
- Department of Physiology, School of Medicine, Showa University, Tokyo 142, Japan.
| | - Tadashi Hisamitsu
- Department of Physiology, School of Medicine, Showa University, Tokyo 142, Japan.
| | - Yayun Qian
- The State Administration of Traditional Chinese Medicine Key Laboratory of Toxic Pathogens-Based Therapeutic Approaches of Gastric Cancer, Yangzhou 225000, China; Clinical Medicine College of Yangzhou University, Yangzhou 225000, China.
| | - Yanqing Liu
- The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou 225000, China; The State Administration of Traditional Chinese Medicine Key Laboratory of Toxic Pathogens-Based Therapeutic Approaches of Gastric Cancer, Yangzhou 225000, China; Clinical Medicine College of Yangzhou University, Yangzhou 225000, China.
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692
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Zhu R, Chen YX, Ke QF, Gao YS, Guo YP. SC79-loaded ZSM-5/chitosan porous scaffolds with enhanced stem cell osteogenic differentiation and bone regeneration. J Mater Chem B 2017; 5:5009-5018. [PMID: 32264018 DOI: 10.1039/c7tb00897j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
For effectively treating bone defects, the design of novel therapeutic scaffolds is an important strategy for enhancing stem cell osteogenic differentiation and new bone formation. Herein, we, for the first time, fabricated SC79-loaded ZSM-5/chitosan (ZSM-5/CS/SC79) porous scaffolds via the freeze-drying synthesis of ZSM-5/CS porous scaffolds followed by loading SC79 drug molecules. The ZSM-5/CS scaffolds possessed a three-dimensional (3D) interconnected porous structure, and the nanostructured ZSM-5 ellipsoids were uniformly dispersed on the CS films. The ZSM-5/CS/SC79 scaffolds had appropriate drug loading-release properties due to the hierarchically porous structures of ZSM-5 zeolites and the hydrogen bonding between the CS and SC97. In vitro cell tests demonstrated that both the ZSM-5/CS and ZSM-5/CS/SC79 scaffolds could promote the adhesion, spreading and proliferation of human bone mesenchymal stem cells (hBMSCs). Interestingly, the SC97 released from the scaffolds not only promoted the proliferation of hBMSCs, but also enhanced the osteogenic differentiation. As compared with the ZSM-5/CS control group, the ZSM-5/CS/SC79 scaffolds promoted the ALP activity of hBMSCs, improved the mRNA relative expression levels of osteocalcin (OCN), bone morphogenetic protein-2 (BMP-2) and alkaline phosphatise (ALP), and increased the protein level of β-catenin. The enhanced proliferation and osteogenic differentiation of hBMSCs contributed to the upregulation of Akt kinase by an activated Wnt/β-catenin signaling pathway. Moreover, in vivo animal tests indicated that SC79 released from the ZSM-5/CS/SC79 scaffolds promoted the new bone regeneration without systemic side effects in cranial defects. Therefore, ZSM-5/CS/SC79 scaffolds as novel and promising therapeutic scaffolds have promising applications in defined local bone regeneration.
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Affiliation(s)
- Rong Zhu
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China.
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693
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Johnson MD, O’Connell M, Walter K, Silberstein H. mTOR activation is increased in pilocytic astrocytomas from older adults compared with children. Surg Neurol Int 2017; 8:85. [PMID: 28607819 PMCID: PMC5461564 DOI: 10.4103/sni.sni_367_16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Accepted: 02/20/2017] [Indexed: 11/08/2022] Open
Abstract
BACKGROUND Recent studies suggest that the behavior and biology of WHO grade I pilocytic astrocytomas (PAs) in adults is different than that associated with grade I PAs in children. METHODS We evaluated Ki-67 labeling, BRAF abnormalities, isocitrate dehydrogenase R132 immunoreactivity phosphorylation (activation) of p44/42 mitogen activated protein kinase (MAPK), and mammalian target of rapamycin (mTOR) in formalin-fixed tissue from 21 adult (18 years or older, mean age 37 years) and 10 children (mean age 9.4 years) WHO grade I PAs. RESULTS The mean Ki-67 labeling was 4.8% in adults and 3.8% in children. There was no significant difference between Ki-67 labeling in children and adults or either subgroups of adults. No differences were found in phospho p44/42MAPK in adult subgroups (18-33 years and 34 and older) compared to children. Activation/phosphorylation of mTOR was biphasic in adults being significantly lower than children in young adults but significantly higher than children in older adults (age 34 and older). CONCLUSIONS Identifying mTOR phosphorylation/activation may represent a difference in biology and a new marker to guide chemotherapy with recently approved mTOR inhibitors.
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Affiliation(s)
- Mahlon D. Johnson
- Department of Pathology, Division of Neuropathology, University of Rochester School of Medicine, Rochester, New York, USA
| | - Mary O’Connell
- Department of Pathology, Division of Neuropathology, University of Rochester School of Medicine, Rochester, New York, USA
| | - Kevin Walter
- Department of Neurosurgery, University of Rochester School of Medicine, Rochester, New York, USA
| | - Howard Silberstein
- Department of Neurosurgery, University of Rochester School of Medicine, Rochester, New York, USA
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694
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Liu Y, Wang Z, Li M, Ye Y, Xu Y, Zhang Y, Yuan R, Jin Y, Hao Y, Jiang L, Hu Y, Chen S, Liu F, Zhang Y, Wu W, Liu Y. Chloride intracellular channel 1 regulates the antineoplastic effects of metformin in gallbladder cancer cells. Cancer Sci 2017; 108:1240-1252. [PMID: 28378944 PMCID: PMC5480064 DOI: 10.1111/cas.13248] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Revised: 03/27/2017] [Accepted: 03/31/2017] [Indexed: 12/14/2022] Open
Abstract
Metformin is the most commonly used drug for type 2 diabetes and has potential benefit in treating and preventing cancer. Previous studies indicated that membrane proteins can affect the antineoplastic effects of metformin and may be crucial in the field of cancer research. However, the antineoplastic effects of metformin and its mechanism in gallbladder cancer (GBC) remain largely unknown. In this study, the effects of metformin on GBC cell proliferation and viability were evaluated using the Cell Counting Kit‐8 (CCK‐8) assay and an apoptosis assay. Western blotting was performed to investigate related signaling pathways. Of note, inhibition, knockdown and upregulation of the membrane protein Chloride intracellular channel 1 (CLIC1) can affect GBC resistance in the presence of metformin. Our data demonstrated that metformin apparently inhibits the proliferation and viability of GBC cells. Metformin promoted cell apoptosis and increased the number of early apoptotic cells. We found that metformin can exert growth‐suppressive effects on these cell lines via inhibition of p‐Akt activity and the Bcl‐2 family. Notably, either dysfunction or downregulation of CLIC1 can partially decrease the antineoplastic effects of metformin while upregulation of CLIC1 can increase drug sensitivity. Our findings provide experimental evidence for using metformin as an antitumor treatment for gallbladder carcinoma.
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Affiliation(s)
- Yongchen Liu
- Department of General Surgery and Laboratory of General Surgery, Xinhua Hospital, Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zheng Wang
- Department of General Surgery and Laboratory of General Surgery, Xinhua Hospital, Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Maolan Li
- Department of General Surgery and Laboratory of General Surgery, Xinhua Hospital, Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yuanyuan Ye
- Department of General Surgery and Laboratory of General Surgery, Xinhua Hospital, Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yi Xu
- Department of General Surgery and Laboratory of General Surgery, Xinhua Hospital, Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yichi Zhang
- Department of General Surgery and Laboratory of General Surgery, Xinhua Hospital, Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ruiyan Yuan
- Department of General Surgery and Laboratory of General Surgery, Xinhua Hospital, Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yunpeng Jin
- Department of General Surgery and Laboratory of General Surgery, Xinhua Hospital, Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yajuan Hao
- Department of General Surgery and Laboratory of General Surgery, Xinhua Hospital, Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Lin Jiang
- Department of General Surgery and Laboratory of General Surgery, Xinhua Hospital, Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yunping Hu
- Department of General Surgery and Laboratory of General Surgery, Xinhua Hospital, Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Shili Chen
- Department of General Surgery and Laboratory of General Surgery, Xinhua Hospital, Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Fatao Liu
- Department of General Surgery and Laboratory of General Surgery, Xinhua Hospital, Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yijian Zhang
- Department of General Surgery and Laboratory of General Surgery, Xinhua Hospital, Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Wenguang Wu
- Department of General Surgery and Laboratory of General Surgery, Xinhua Hospital, Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yingbin Liu
- Department of General Surgery and Laboratory of General Surgery, Xinhua Hospital, Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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695
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Li W, Zhou Y, Zhang X, Yang Y, Dan S, Su T, She S, Dong W, Zhao Q, Jia J, Yao H, Zheng M, Kang B, Wang YJ. Dual inhibiting OCT4 and AKT potently suppresses the propagation of human cancer cells. Sci Rep 2017; 7:46246. [PMID: 28383051 PMCID: PMC5382782 DOI: 10.1038/srep46246] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 03/14/2017] [Indexed: 12/21/2022] Open
Abstract
AKT serves as an epigenetic modulator that links epigenetic regulation to cell survival and proliferation while the epigenetic mediator OCT4 critically controls stem cell pluripotency and self-renewal. Emerging evidence indicated their complicated interplays in cancer cells and cancer stem cells (CSCs), and inhibiting either one may activate the other. Thus, in this study, we propose a strategy to targeting both factors simultaneously. Firstly, a combination of an OCT4-specific shRNA and the specific AKT inhibitor Akti-1/2 potently suppressed the propagation of human embryonal carcinoma cells, adherent cancer cells and stem-like cancer cells, establishing the proof-of-concept that dual inhibiting OCT4 and AKT can effectively target various cancer cells. Next, we combined Akti-1/2 with metformin, a widely-prescribed drug for treating type 2 diabetes, which was reported to down-regulate OCT4 expression. The metformin + Akti-1/2 combo significantly altered multiple signaling and epigenetic pathways, induced growth arrest and cell death of adherent and stem-like glioblastoma U87 cells, and attenuated their tumorigenicity in vivo. Taken together, we demonstrate here that simultaneously targeting an epigenetic mediator and an epigenetic modulator, by dual inhibiting OCT4 and AKT, can have significantly improved efficacies over single treatment in suppressing the propagation of CSCs as well as the entire bulk of differentiated cancer cells.
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Affiliation(s)
- Wenxin Li
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310003, China
| | - Yanwen Zhou
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310003, China
| | - Xiaoqian Zhang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310003, China
| | - Ying Yang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310003, China
| | - Songsong Dan
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310003, China
| | - Tong Su
- College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Shiqi She
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310003, China
| | - Weilai Dong
- College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Qingwei Zhao
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310003, China
- Department of Pharmacy, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310003, China
| | - Jia Jia
- Shanghai Center for Bioinformation Technology, Shanghai 201203, China
| | - Hangping Yao
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310003, China
| | - Min Zheng
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310003, China
| | - Bo Kang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310003, China
| | - Ying-Jie Wang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310003, China
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696
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Tang J, Qin Z, Han P, Wang W, Yang C, Xu Z, Li R, Liu B, Qin C, Wang Z, Tang M, Zhang W. High Annexin A5 expression promotes tumor progression and poor prognosis in renal cell carcinoma. Int J Oncol 2017; 50:1839-1847. [PMID: 28393205 DOI: 10.3892/ijo.2017.3942] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Accepted: 03/20/2017] [Indexed: 11/06/2022] Open
Abstract
Annexin A5 has been found to act as an oncogenic protein in a variety of cancers. However, its specific biological role and mechanism in renal cell cancer (RCC) remains unknown. Quantitative Real-time PCR and western blotting were used to evaluate the mRNA and protein expression level of Annexin A5 in human RCC cell lines and tissues. Immunohistochemistry was adopted to measure the Annexin A5 expression in 123 cases of RCC tissues. Survival analysis was performed to explore the association between Annexin A5 expression and the prognosis of RCC. The effect of Annexin A5 on RCC growth and metastasis was studied in vitro and in vivo. Annexin A5 was frequently highly expressed in both human RCC cells and tissues. High Annexin A5 expression was associated with higher clinical stage and histological grade. In addition, Annexin A5 might be used as a predictive factor for the prognosis of RCC. Further research suggested that upregulated Annexin A5 in RCC cells could significantly promote tumor cell proliferation, migration and invasion in vitro. Subcutaneous xenograft tumor model displayed that knockdown of Annexin A5 could impede tumorigenesis in vivo. Moreover, mechanism study exhibited that Annexin A5 could activate PI3K/Akt/mTOR signaling pathway, promote epithelial-mesenchymal transition (EMT) and the expression of MMP2 and MMP9. Annexin A5 may be a potential prognostic biomarker in RCC and promotes proliferation, migration and invasion of RCC cells via activating PI3K/Akt/mTOR signaling pathway and regulating EMT process and MMP expression.
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Affiliation(s)
- Jingyuan Tang
- Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210009, P.R. China
| | - Zhiqiang Qin
- Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210009, P.R. China
| | - Peng Han
- Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210009, P.R. China
| | - Wei Wang
- Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210009, P.R. China
| | - Chengdi Yang
- Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210009, P.R. China
| | - Zhen Xu
- Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210009, P.R. China
| | - Ran Li
- Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210009, P.R. China
| | - Bianjiang Liu
- Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210009, P.R. China
| | - Chao Qin
- Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210009, P.R. China
| | - Zengjun Wang
- Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210009, P.R. China
| | - Min Tang
- Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210009, P.R. China
| | - Wei Zhang
- Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210009, P.R. China
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697
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Quan Z, He Y, Luo C, Xia Y, Zhao Y, Liu N, Wu X. Interleukin 6 induces cell proliferation of clear cell renal cell carcinoma by suppressing hepaCAM via the STAT3-dependent up-regulation of DNMT1 or DNMT3b. Cell Signal 2017; 32:48-58. [PMID: 28093267 DOI: 10.1016/j.cellsig.2017.01.017] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Revised: 01/09/2017] [Accepted: 01/10/2017] [Indexed: 12/16/2022]
Abstract
Interleukin 6 (IL-6), a tumor promoting cytokine, has been largely implicated in the development of renal cell carcinoma (RCC). Hepatocyte cell adhesion molecule (hepaCAM) is a novel tumor suppressor, which is lost or down-regulated in many cancer types including RCC. In the present study, we intensively investigated the connection between IL-6 and hepaCAM in RCC. Our analysis of RCC tissues, adjacent tissues and paired serum samples from RCC patients revealed that IL-6 was elevated in patient serum and RCC tissue, whereas hepaCAM was completely lost or significantly down-regulated. Furthermore, we observed an association between IL-6 increase and hepaCAM decrease in RCC tissue samples. In the section of cytological researches, we found in RCC cell lines that IL-6 was a direct upstream regulator of hepaCAM, and that hepaCAM down-regulation was involved in IL-6-driven cell proliferation. We also demonstrated that IL-6-mediated promoter hypermethylation largely accounted for the hepaCAM loss in RCC, and it was STAT3-dependent. Additionally, our data showed that DNMT1 up-regulation induced by IL-6/STAT3 signaling was indispensable for IL-6-mediated hepaCAM loss in RCC cell lines ACHN and 769-P, while DNMT3b up-regulation was crucial for hepaCAM loss in A498. Our findings provide a novel signal pathway regulating cell proliferation, potentially representing a therapeutic target for RCC.
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Affiliation(s)
- Zhen Quan
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China
| | - Yunfeng He
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China
| | - Chunli Luo
- Department of Laboratory Diagnosis, Chongqing Medical University, Chongqing, People's Republic of China
| | - Yang Xia
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China
| | - Yan Zhao
- Department of Laboratory Diagnosis, Chongqing Medical University, Chongqing, People's Republic of China
| | - Nanjing Liu
- Department of Laboratory Diagnosis, Chongqing Medical University, Chongqing, People's Republic of China
| | - Xiaohou Wu
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China.
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698
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The crosstalk between long non-coding RNAs and PI3K in cancer. Med Oncol 2017; 34:39. [PMID: 28176240 DOI: 10.1007/s12032-017-0897-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2017] [Accepted: 01/27/2017] [Indexed: 12/21/2022]
Abstract
Long non-coding RNAs (lncRNAs) are able to positively or negatively regulate other genes expression in cis or in trans. Their effect can be achieved through RNA-protein, RNA-DNA, or RNA-RNA interactions. They can recruit transcription factors and act as scaffolds or guides for chromatin-modifying enzymes. PI3K kinases transform external stimuli to intracellular signals regulating cell growth, differentiation, proliferation, survival, intracellular trafficking, cytoskeletal changes, cell migration and motility, and metabolism. PI3K is activated in cancer and affects several aspects of oncogenesis. LncRNAs and PI3K have been shown to be interconnected in several different cancer subtypes enhancing aberrant cell proliferation, epithelial-to-mesenchymal transition, migration and invasion, and also cancer cell metabolism. In this review, we have assembled recent data describing the interaction between lncRNAs and PI3K and the results of such interaction.
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699
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Paris saponin-induced autophagy promotes breast cancer cell apoptosis via the Akt/mTOR signaling pathway. Chem Biol Interact 2017; 264:1-9. [DOI: 10.1016/j.cbi.2017.01.004] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Revised: 12/08/2016] [Accepted: 01/10/2017] [Indexed: 11/20/2022]
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700
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Jia L, Gu W, Zhang Y, Ji Y, Liang J, Wen Y, Xu X. The Crosstalk between HDPSCs and HUCMSCs on Proliferation and Osteogenic Genes Expression in Coculture System. Int J Med Sci 2017; 14:1118-1129. [PMID: 29104466 PMCID: PMC5666543 DOI: 10.7150/ijms.19814] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2017] [Accepted: 06/19/2017] [Indexed: 12/20/2022] Open
Abstract
Objectives: The present study established a non-contact coculture system in vitro, aiming to investigate the crosstalk between human dental pulp stem cells (hDPSCs) and human umbilical cord mesenchymal stem cells (hUCMSCs) on proliferation activity and osteogenic genes expression through paracrine. Materials and methods: The stemness of hDPSCs and hUCMSCs were identified by flow cytometric analysis and multipotential differentiation assays. With the help of transwell inserts, the non-contact coculture system in vitro was established between hDPSCs and hUCMSCs. EdU labeling analysis and Western Blot were used to detect the proliferation activity. The mRNA and protein levels of osteogenic genes were evaluated by RT-PCR and Western Blot. The expression of elements in Akt/mTOR signaling pathway were detected by Western Blot. Results: Both hDPSCs and hUCMSCs were positive to MSCs specific surface markers and had multi-differentiation potential. The proportion of EdU-positive cells increased and the expression of CDK6 and CYCLIN A were up-regulated in cocultured hDPSCs. Both prior coculture and persistent coculture improved mRNA and protein levels of osteogenic genes in hDPSCs. While in cocultured hUCMSCs, no statistical differences were observed on proliferation and osteogenesis. The phosphorylation of Akt and mTOR was up-regulated in cocultured hDPSCs. Conclusions: The crosstalk between hDPSCs and hUCMSCs in coculture system increased the proliferation activity and enhanced osteogenic genes expression in hDPSCs. Akt/mTOR signaling pathway might take part in the enhancing effects in both cell proliferation and gene expression.
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Affiliation(s)
- Linglu Jia
- School of Stomatology, Shandong University, Jinan, China.,Shandong provincial key laboratory of oral tissue regeneration, Jinan, China
| | - Weiting Gu
- Qilu hospital of Shandong University, Jinan, China
| | - Yunpeng Zhang
- School of Stomatology, Shandong University, Jinan, China.,Shandong provincial key laboratory of oral tissue regeneration, Jinan, China
| | - Yawen Ji
- School of Stomatology, Shandong University, Jinan, China.,Shandong provincial key laboratory of oral tissue regeneration, Jinan, China
| | - Jin Liang
- School of Stomatology, Shandong University, Jinan, China.,Shandong provincial key laboratory of oral tissue regeneration, Jinan, China
| | - Yong Wen
- School of Stomatology, Shandong University, Jinan, China.,Shandong provincial key laboratory of oral tissue regeneration, Jinan, China
| | - Xin Xu
- School of Stomatology, Shandong University, Jinan, China.,Shandong provincial key laboratory of oral tissue regeneration, Jinan, China
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