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Rolim LSA, Nascente PDS, Castilho RM, Squarize CH. Feeling the Heat. Mapping the Epigenetic Modifications of Histone during Burn Wound Healing. J Burn Care Res 2024; 45:499-507. [PMID: 37998258 PMCID: PMC10911690 DOI: 10.1093/jbcr/irad187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Indexed: 11/25/2023]
Abstract
Burn injuries are observed throughout a wide range of ages, with over 1.1 million Americans suffering burns yearly, and half of these require hospitalization. Epigenetic modifications are fast-acting mechanisms that allow the human body to respond and adapt to environmental changes, including burn injuries. There is a lack of understanding of the epigenetic role during burn-induced tissue repair. Here, we characterize the histone modifications that follow burn injury, aiming at future pharmacological intervention using drugs capable of targeting epigenetic events. A clinically relevant porcine burn model was used to recapitulate the skin healing process after the burn. Isolated skin tissues at different time points were used to detect the acetylation levels of histones H3K27, H4K5, H4K8, and H4K12 as significant players of gene transcription using MetaXpress High-Content Imaging Analysis. We observed that the acetylation of histones is dynamically adjusted throughout healing, and its modifications are uniquely expressed according to the anatomical location and time of healing. We also observed that histone H4K5 is the most widely expressed during healing, followed by histone H3K27. We observed that histones expressed in intact skin tissue adjacent to the burn site could sense the burn injury by changing its histone acetylation pattern compared to control skin from uninjured and distant skin. Using a clinically relevant animal model, we have generated a comprehensive landscape of epigenetic modifications during burn healing. Our data will help us identify novel epi-drugs capable of manipulating histone modifications during healing to accelerate the healing process.
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Affiliation(s)
- Larissa S A Rolim
- Department of Periodontics and Oral Medicine, Laboratory of Epithelial Biology, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
- Odontology Sciences Postgraduate Program, Dentistry Department, Federal University of Rio Grande do Norte, Natal 59056, Rio Grande do Norte, Brazil
| | - Patricia da S Nascente
- Department of Periodontics and Oral Medicine, Laboratory of Epithelial Biology, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
- Department of Microbiology and Parasitology, Institute of Biology, Federal University of Pelotas—UFPel, Capão do Leão, Rio Grande do Sul, Brazil
| | - Rogerio M Castilho
- Department of Periodontics and Oral Medicine, Laboratory of Epithelial Biology, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
- Rogel Cancer Center, University of Michigan, Ann Arbor, MI, USA
| | - Cristiane H Squarize
- Department of Periodontics and Oral Medicine, Laboratory of Epithelial Biology, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
- Rogel Cancer Center, University of Michigan, Ann Arbor, MI, USA
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Emerick C, Mariano FV, Squarize CH, Castilho RM. Spotlight on rare cancers. Oral Dis 2024; 30:799-800. [PMID: 35719113 DOI: 10.1111/odi.14284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Accepted: 06/11/2022] [Indexed: 11/26/2022]
Affiliation(s)
- Carolina Emerick
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil
- Department of Pathology, Faculty of Medical Sciences, University of Campinas (UNICAMP), Campinas, Sao Paulo, Brazil
- Department of Periodontics and Oral Medicine, Laboratory of Epithelial Biology, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
| | - Fernanda Viviane Mariano
- Department of Pathology, Faculty of Medical Sciences, University of Campinas (UNICAMP), Campinas, Sao Paulo, Brazil
| | - Cristiane H Squarize
- Department of Periodontics and Oral Medicine, Laboratory of Epithelial Biology, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
- University of Michigan Rogel Cancer Center, Ann Arbor, Michigan, USA
| | - Rogerio M Castilho
- Department of Periodontics and Oral Medicine, Laboratory of Epithelial Biology, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
- University of Michigan Rogel Cancer Center, Ann Arbor, Michigan, USA
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3
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Pina PSS, Jang Y, Emerick C, Scarini JF, Sousa SCOM, Squarize CH, Castilho RM. Novel Epigenetic Modifiers of Histones Presenting Potent Inhibitory Effects on Adenoid Cystic Carcinoma Stemness and Invasive Properties. Int J Mol Sci 2024; 25:1646. [PMID: 38338924 PMCID: PMC10855771 DOI: 10.3390/ijms25031646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 01/24/2024] [Accepted: 01/25/2024] [Indexed: 02/12/2024] Open
Abstract
Adenoid cystic carcinoma (ACC) is a rare neoplasm known for its indolent clinical course, risk of perineural invasion, and late onset of distant metastasis. Due to the scarcity of samples and the tumor's rarity, progress in developing effective treatments has been historically limited. To tackle this issue, a high-throughput screening of epigenetic drugs was conducted to identify compounds capable of disrupting the invasive properties of the tumor and its cancer stem cells (CSCs). ACC cells were screened for changes in tumor viability, chromatin decondensation, Snail inhibition along tumor migration, and disruption of cancer stem cells. Seven compounds showed potential clinical interest, and further validation showed that Scriptaid emerged as a promising candidate for treating ACC invasion. Scriptaid demonstrated a favorable cellular toxicity index, effectively inhibited Snail expression, induced hyperacetylation of histone, reduced cell migration, and effectively disrupted tumorspheres. Additionally, LMK235 displayed encouraging results in four out of five validation assays, further highlighting its potential in combating tumor invasion in ACC. By targeting the invasive properties of the tumor and CSCs, Scriptaid and LMK235 hold promise as potential treatments for ACC, with the potential to improve patient outcomes and pave the way for further research in this critical area.
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Affiliation(s)
- Paulo S. S. Pina
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI 48109, USA; (P.S.S.P.); (Y.J.); (C.E.); (J.F.S.); (C.H.S.)
- Department of Stomatology, School of Dentistry, University of São Paulo, Sao Paulo 05508-270, Brazil;
| | - Yeejin Jang
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI 48109, USA; (P.S.S.P.); (Y.J.); (C.E.); (J.F.S.); (C.H.S.)
| | - Carolina Emerick
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI 48109, USA; (P.S.S.P.); (Y.J.); (C.E.); (J.F.S.); (C.H.S.)
- Oral Diagnosis Department, Piracicaba School of Dentistry, State University of Campinas, Piracicaba 13414-903, Brazil
| | - João Figueira Scarini
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI 48109, USA; (P.S.S.P.); (Y.J.); (C.E.); (J.F.S.); (C.H.S.)
- Oral Diagnosis Department, Piracicaba School of Dentistry, State University of Campinas, Piracicaba 13414-903, Brazil
| | - Suzana C. O. M. Sousa
- Department of Stomatology, School of Dentistry, University of São Paulo, Sao Paulo 05508-270, Brazil;
| | - Cristiane H. Squarize
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI 48109, USA; (P.S.S.P.); (Y.J.); (C.E.); (J.F.S.); (C.H.S.)
- Rogel Cancer Center, University of Michigan, Ann Arbor, MI 48109, USA
| | - Rogerio M. Castilho
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI 48109, USA; (P.S.S.P.); (Y.J.); (C.E.); (J.F.S.); (C.H.S.)
- Rogel Cancer Center, University of Michigan, Ann Arbor, MI 48109, USA
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Almeida LO, Silva LC, Emerick C, Amorim Dos Santos J, Castilho RM, Squarize CH. Head and neck cancer stem cell maintenance relies on mTOR signaling, specifically involving the mechanistic target of rapamycin complexes 1 and 2 (mTORC1 and mTORC2). Arch Oral Biol 2024; 157:105840. [PMID: 37939517 DOI: 10.1016/j.archoralbio.2023.105840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 10/13/2023] [Accepted: 10/29/2023] [Indexed: 11/10/2023]
Abstract
OBJECTIVE Emerging evidence suggests that the modest response of head and neck squamous cell carcinoma (HNSCC) to treatment is associated with cancer stem cells (CSC). However, the signaling pathways that play a role in HNSCC CSC maintenance and therapy response are not well-understood. In this study, we investigate the response of CSCs to phosphatase and tensin homolog (PTEN) modulation and its potential dependency on the mammalian target of rapamycin (mTOR) signaling. DESIGN PTEN deficiency was stably induced using short hairpin RNA (shRNA). Downregulation of RPTOR/mTORC1 and RICTOR/mTORC2 was achieved using small interfering RNA (siRNA). CSCs were evaluated through tumorsphere formation and were classified into various subtypes: parasphere, merosphere, and holosphere. We investigated the effect of rapamycin on CSC properties in both control and PTEN-deficient HNSCC cells. RESULTS PTEN deficiency led to an accumulation of CSCs and enhanced a favorable response to rapamycin treatment. The viability of HNSCC CSCs was dependent on mTOR signaling. Deficiencies in both mTORC1 and mTORC2 reduced the number of CSCs. However, CSCs with PTEN deficiency had a greater reliance on mTORC1 signaling. Interestingly, when considering CSC subtypes, a deficiency in mTORC2 led to an increased number of paraspheres in both the control and PTEN-deficient groups. CONCLUSIONS Loss of PTEN signaling increased the HNSCC CSC population, which can be targeted by rapamycin. However, the mTORC2 deficiency can induce a problematic selection of paraspheres CSCs subtype.
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Affiliation(s)
- Luciana O Almeida
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA; Department of Basic and Oral Biology, University of Sao Paulo School of Dentistry, Ribeirao Preto, São Paulo, Brazil
| | - Luan César Silva
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA; Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Carolina Emerick
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA; Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Juliana Amorim Dos Santos
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - Rogerio M Castilho
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - Cristiane H Squarize
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA.
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Silva LC, Leite AA, Borgato GB, Wagner VP, Martins MD, Loureiro FJA, Lopes MA, Santos-Silva AR, Sperandio M, de Castro Junior G, Kowalski LP, Squarize CH, Castilho RM, Vargas PA. Oral squamous cell carcinoma cancer stem cells have different drug sensitive to pharmacological NFκB and histone deacetylation inhibition. Am J Cancer Res 2023; 13:6038-6050. [PMID: 38187064 PMCID: PMC10767341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 11/06/2023] [Indexed: 01/09/2024] Open
Abstract
Despite many progresses in the development of new systemic therapies for oral squamous cell carcinoma (OSCC), the five-year survival rate of OSCC is low. The traditional chemotherapies approach (cisplatin - CDDP) shows some limitations like drug toxicity, limited efficacy, and drug resistance. Promising studies suggested OSCC cancer stem cells (CSC) presented resistance to CDDP. We have previously studied many targets, and we extensively showed the efficacy of the NFκB signaling and the role of histones acetylation, on different malignant tumors, including adenoid cystic carcinoma and mucoepidermoid carcinoma, but until then the effects of the NFkB inhibitor and histone deacetylase (HDAC) inhibitor on the biology of OSCC were not evaluated. Here we assessed the pharmacological inhibitor of NFκB emetine and HDAC inhibitor SAHA on the behavior of CSC derived from OSCC. Our data suggested that CDDP administration resulted in reduced viability of bulk OSCC cells and increased CSC. A single and isolated shot of emetine and SAHA were able to disrupt CSC by inhibiting the NFκB pathway and increasing the histone acetylation levels, respectively. Further, the combined administration of emetine and SAHA presented the same CSC disruption as seen in emetine alone.
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Affiliation(s)
- Luan César Silva
- Department of Oral Diagnosis, Piracicaba Dental School, University of CampinasPiracicaba, SP, Brazil
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of DentistryAnn Arbor, MI, USA
| | - Amanda Almeida Leite
- Department of Oral Diagnosis, Piracicaba Dental School, University of CampinasPiracicaba, SP, Brazil
| | | | - Vivian Petersen Wagner
- Academic Unit of Oral and Maxillofacial Medicine and Pathology, Department of Clinical Dentistry, University of SheffieldSheffield, SY, UK
| | - Manoela Domingues Martins
- Department of Oral Diagnosis, Piracicaba Dental School, University of CampinasPiracicaba, SP, Brazil
- Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do SulPorto Alegre, Brazil
| | | | - Márcio Ajudarte Lopes
- Department of Oral Diagnosis, Piracicaba Dental School, University of CampinasPiracicaba, SP, Brazil
| | - Alan Roger Santos-Silva
- Department of Oral Diagnosis, Piracicaba Dental School, University of CampinasPiracicaba, SP, Brazil
| | - Marcelo Sperandio
- Department of Oral Pathology & Medicine, Sao Leopoldo Mandic Dental Institute and Research CenterCampinas, SP, Brazil
| | - Gilberto de Castro Junior
- Serviço de Oncologia Clínica, Instituto do Câncer do Estado de São Paulo, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São PauloSão Paulo, SP, Brazil
| | - Luiz Paulo Kowalski
- Department of Head and Neck Surgery, University of Sao Paulo Medical School and Head and Neck Surgery and Otorhinolaryngology Department, AC Camargo Cancer CenterSão Paulo, SP, Brazil
| | - Cristiane H Squarize
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of DentistryAnn Arbor, MI, USA
| | - Rogerio Moraes Castilho
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of DentistryAnn Arbor, MI, USA
| | - Pablo Agustin Vargas
- Department of Oral Diagnosis, Piracicaba Dental School, University of CampinasPiracicaba, SP, Brazil
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6
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Castilho RM, Castilho MS, Simmons Z, Squarize CH. Empowering the youth to choose non-traditional careers in research and academia. J Oral Pathol Med 2023; 52:339-341. [PMID: 36694271 DOI: 10.1111/jop.13407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 01/19/2023] [Indexed: 01/26/2023]
Abstract
BACKGROUD The United States is facing a dramatic shortage of clinician-scientists within the domains of medicine and dentistry. POINT OF VIEW In this perspective article, we stressed the problem involving the continuous shortage of specialized professionals capable of addressing complex basic sciences questions, while maintaining clinical relevance. Here we present a different perspective regarding the early engagement of young students to clinical sciences by teaming up with high schools across the United States, and to energize the debate on our current shortage of clinician-scientists.
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Affiliation(s)
- Rogerio M Castilho
- Department of Periodontics and Oral Medicine, Laboratory of Epithelial Biology, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA.,University of Michigan Rogel Cancer Center, Ann Arbor, Michigan, USA
| | | | - Zoë Simmons
- Community High School, Ann Arbor, Michigan, USA
| | - Cristiane H Squarize
- Department of Periodontics and Oral Medicine, Laboratory of Epithelial Biology, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA.,University of Michigan Rogel Cancer Center, Ann Arbor, Michigan, USA
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7
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Guimarães LDA, Webber LP, Gaio EJ, Junior DSP, Gonçalves P, Wick MJ, Burr NS, Squarize CH, Castilho RM. Using PDX animal models to identify and stratify adenoid cystic carcinoma patients presenting an enhanced response to HDAC inhibitors. Am J Cancer Res 2023; 13:143-160. [PMID: 36777521 PMCID: PMC9906074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 12/13/2022] [Indexed: 02/14/2023] Open
Abstract
Adenoid cystic carcinoma (ACC) patients face a highly infiltrative and metastatic disease characterized by poor survival rates and suboptimal response to available therapies. We have previously shown that sensitization of ACC tumors to chemotherapy using histone deacetylase inhibitors (HDACi) constitutes a promising therapeutic strategy to manage tumor growth. Here, we used patient-derived xenografts (PDX) from ACC tumors to evaluate the effects of in vivo administration of the HDAC inhibitor Entinostat combined with Cisplatin over tumor growth. RNA from PDX tumor samples receiving the proposed therapy were analyzed using NanoString technology to identify molecular signatures capable of predicting ACC response to the therapy. We also used an RNAseq dataset from 68 ACC patients to validate the molecular signature identified by the NanoString platform. We found that the administration of Entinostat combined with Cisplatin resulted in a potent tumor growth inhibition (TGI) ranging from 38% to 106% of the original tumor mass. Enhanced response to therapy is consistent with the reactivation of tumor suppressor genes, including SFRP1, and the downregulation of oncogenes like FGF8 and CCR7. Nanostring data from PDX tumors identified a genetic signature capable of predicting tumor response to therapy. We further stratified 68 ACC patients containing RNAseq data accordingly to the activity levels of the identified genetic signature. We found that 23% of all patients exhibit a genetic signature consistent with a high ACC tumor response rate to Entinostat and Cisplatin. Our study provides compelling preclinical data supporting the deployment of a powerful systemic anticancer therapy crafted and explicitly tested for ACC tumors.
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Affiliation(s)
- Leticia DA Guimarães
- Laboratory of Epithelial Biology, University of Michigan School of DentistryAnn Arbor, MI, USA,Department of Stomatology, University of São PauloSão Paulo, SP, Brazil
| | - Liana P Webber
- Laboratory of Epithelial Biology, University of Michigan School of DentistryAnn Arbor, MI, USA
| | - Eduardo J Gaio
- Laboratory of Epithelial Biology, University of Michigan School of DentistryAnn Arbor, MI, USA,Department of Periodontology, Federal University of Rio Grande do SulPorto Alegre, RS, Brazil
| | - Decio SP Junior
- Department of Stomatology, University of São PauloSão Paulo, SP, Brazil
| | - Priscila Gonçalves
- Zucker School of Medicine at Hofstra/Northwell, Monter Cancer CenterLake Success, NY, USA
| | - Michael J Wick
- South Texas Accelerated Research TherapeuticsSan Antonio, TX, USA
| | - Nicole S Burr
- Adenoid Cystic Carcinoma Research FoundationNeedham, MA, USA
| | - Cristiane H Squarize
- Laboratory of Epithelial Biology, University of Michigan School of DentistryAnn Arbor, MI, USA,University of Michigan Rogel Cancer Center, University of MichiganAnn Arbor, MI, USA
| | - Rogerio M Castilho
- Laboratory of Epithelial Biology, University of Michigan School of DentistryAnn Arbor, MI, USA,University of Michigan Rogel Cancer Center, University of MichiganAnn Arbor, MI, USA
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8
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Emerick C, Mariano FV, Vargas PA, Nör JE, Squarize CH, Castilho RM. Adenoid Cystic Carcinoma from the salivary and lacrimal glands and the breast: different clinical outcomes to the same tumor. Crit Rev Oncol Hematol 2022; 179:103792. [PMID: 35973662 DOI: 10.1016/j.critrevonc.2022.103792] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 08/09/2022] [Accepted: 08/11/2022] [Indexed: 10/31/2022] Open
Abstract
Adenoid cystic carcinoma (ACC) is a biphasic malignant lesion that can develop at various anatomical sites. Salivary and lacrimal ACC lesions have a high risk of local invasion, metastasis, and poor prognosis. In more distant organs, such as the breast, ACC is a rarer and less aggressive lesion. One of the major predictors of mortality of ACC is perineural invasion, which can be seen in 30% of breast lesions, 85% of salivary lesions, and almost 100% of lacrimal gland tumors. The biological differences between these three ACC tumors are still poorly understood. We focused on the current understanding of the genetic variations observed on ACC tumors and prognostic differences associated with distinct anatomical sites. A special effort was made to present the currently available therapies alongside the emerging strategies under development.
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Affiliation(s)
- Carolina Emerick
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil; Department of Pathology, Faculty of Medical Sciences, University of Campinas (UNICAMP), Campinas, Sao Paulo, Brazil; Department of Periodontics and Oral Medicine, Laboratory of Epithelial Biology, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
| | - Fernanda Viviane Mariano
- Department of Pathology, Faculty of Medical Sciences, University of Campinas (UNICAMP), Campinas, Sao Paulo, Brazil
| | - Pablo Agustin Vargas
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil
| | - Jacques E Nör
- Department of Cariology, Restorative Sciences, and Endodontics, Angiogenesis Research Laboratory, University of Michigan School of Dentistry Ann Arbor, Michigan, USA; Department of Otolaryngology-Head and Neck Surgery, University of Michigan Health System, Ann Arbor, Michigan, USA; University of Michigan Rogel Cancer Center, Ann Arbor, Michigan, USA
| | - Cristiane H Squarize
- Department of Periodontics and Oral Medicine, Laboratory of Epithelial Biology, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA; University of Michigan Rogel Cancer Center, Ann Arbor, Michigan, USA
| | - Rogerio M Castilho
- Department of Periodontics and Oral Medicine, Laboratory of Epithelial Biology, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA; University of Michigan Rogel Cancer Center, Ann Arbor, Michigan, USA.
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Islam NM, Laughter L, Sadid-Zadeh R, Smith C, Dolan TA, Crain G, Squarize CH. Adopting artificial intelligence in dental education: A model for academic leadership and innovation. J Dent Educ 2022; 86:1545-1551. [PMID: 35781809 DOI: 10.1002/jdd.13010] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 03/25/2022] [Accepted: 05/28/2022] [Indexed: 11/06/2022]
Abstract
INTRODUCTION The continual evolution of dental education, dental practice and the delivery of optimal oral health care is rooted in the practice of leadership. This paper explores opportunities and challenges facing dental education with a specific focus on incorporating the use of artificial intelligence (AI). METHODS Using the model in Bolman and Deal's Reframing Organizations, the Four Frames model serves as a road map for building infrastructure within dental schools for the adoption of AI. CONCLUSION AI can complement and boost human tasks and have a far-reaching impact in academia and health care. Its adoption could enhance educational experiences and the delivery of care, and support current functions and future innovation. The framework suggested in this paper, while specific to AI, could be adapted and applied to a myriad of innovations and new organizational ideals and goals within institutions of dental education.
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Affiliation(s)
- Nadim M Islam
- Department of Oral and Maxillofacial Diagnostic Sciences, University of Florida College of Dentistry, Gainesville, Florida, USA
| | - Lory Laughter
- Department of Periodontics, University of the Pacific, San Francisco, California, USA
| | - Ramtin Sadid-Zadeh
- Department of Restorative Dentistry and Digital Technologies, University at Buffalo School of Dental Medicine, Buffalo, New York, USA
| | - Carlos Smith
- Dental Public Health and Policy, Virginia Commonwealth University School of Dentistry, Richmond, Virginia, USA
| | - Teresa A Dolan
- Chief Dental Officer, Overjet AI, Boston, Massachusetts, USA
| | - Geralyn Crain
- College of Dental Medicine, Roseman University of Health Sciences, South Jordan, Utah, USA
| | - Cristiane H Squarize
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
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10
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Spuldaro TR, Wagner VP, Nör F, Gaio EJ, Squarize CH, Carrard VC, Rösing CK, Castilho RM. Periodontal disease affects oral cancer progression in a surrogate animal model for tobacco exposure. Int J Oncol 2022; 60:77. [PMID: 35514311 PMCID: PMC9097773 DOI: 10.3892/ijo.2022.5367] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Accepted: 04/12/2022] [Indexed: 11/11/2022] Open
Abstract
For decades, the link between poor oral hygiene and the increased prevalence of oral cancer has been suggested. Most recently, emerging evidence has suggested that chronic inflammatory diseases from the oral cavity (e.g., periodontal disease), to some extent, play a role in the development of oral squamous cell carcinoma (OSCC). The present study aimed to explore the direct impact of biofilm‑induced periodontitis in the carcinogenesis process using a tobacco surrogate animal model for oral cancer. A total of 42 Wistar rats were distributed into four experimental groups: Control group, periodontitis (Perio) group, 4‑nitroquinoline 1‑oxide (4‑NQO) group and 4NQO/Perio group. Periodontitis was stimulated by placing a ligature subgingivally, while oral carcinogenesis was induced by systemic administration of 4NQO in the drinking water for 20 weeks. It was observed that the Perio, 4NQO and 4NQO/Perio groups presented with significantly higher alveolar bone loss compared with that in the control group. Furthermore, all groups receiving 4NQO developed lesions on the dorsal surface of the tongue; however, the 4NQO/Perio group presented larger lesions compared with the 4NQO group. There was also a modest overall increase in the number of epithelial dysplasia and OSCC lesions in the 4NQO/Perio group. Notably, abnormal focal activation of cellular differentiation (cytokeratin 10‑positive cells) that extended near the basal cell layer of the mucosa was observed in rats receiving 4NQO alone, but was absent in rats receiving 4NQO and presenting with periodontal disease. Altogether, the presence of periodontitis combined with 4NQO administration augmented tumor size in the current rat model and tampered with the protective mechanisms of the cellular differentiation of epithelial cells.
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Affiliation(s)
- Tobias R. Spuldaro
- Department of Periodontology, Federal University of Rio Grande do Sul, Porto Alegre, RS 90010-150, Brazil
| | - Vivian P. Wagner
- Department of Oral Pathology, Federal University of Rio Grande do Sul, Porto Alegre, RS 90010-150, Brazil
- Academic Unit of Oral and Maxillofacial Medicine and Pathology, Department of Clinical Dentistry, University of Sheffield, Sheffield S10 2TN, UK
| | - Felipe Nör
- Department of Oral Pathology, Federal University of Rio Grande do Sul, Porto Alegre, RS 90010-150, Brazil
- Department of Periodontics and Oral Medicine, University of Michigan, Ann Arbor, MI 48109-1078, USA
| | - Eduardo J. Gaio
- Department of Periodontology, Federal University of Rio Grande do Sul, Porto Alegre, RS 90010-150, Brazil
| | - Cristiane H. Squarize
- Department of Periodontics and Oral Medicine, University of Michigan, Ann Arbor, MI 48109-1078, USA
- Laboratory of Epithelial Biology, University of Michigan School of Dentistry, Ann Arbor, MI 48109-1078, USA
- Rogel Cancer Center, University of Michigan, Ann Arbor, MI 48109-0944, USA
| | - Vinicius C. Carrard
- Department of Oral Pathology, Federal University of Rio Grande do Sul, Porto Alegre, RS 90010-150, Brazil
- Department of Oral Medicine, Otorhinolaryngology Service, Porto Alegre General Hospital, Port Alegre, RS 90035-903, Brazil
| | - Cassiano K. Rösing
- Department of Periodontology, Federal University of Rio Grande do Sul, Porto Alegre, RS 90010-150, Brazil
| | - Rogerio M. Castilho
- Department of Periodontics and Oral Medicine, University of Michigan, Ann Arbor, MI 48109-1078, USA
- Laboratory of Epithelial Biology, University of Michigan School of Dentistry, Ann Arbor, MI 48109-1078, USA
- Rogel Cancer Center, University of Michigan, Ann Arbor, MI 48109-0944, USA
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11
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Nascimento-Filho CHV, Glinos AT, Jang Y, Goloni-Bertollo EM, Castilho RM, Squarize CH. From Tissue Physoxia to Cancer Hypoxia, Cost-Effective Methods to Study Tissue-Specific O 2 Levels in Cellular Biology. Int J Mol Sci 2022; 23:ijms23105633. [PMID: 35628446 PMCID: PMC9144419 DOI: 10.3390/ijms23105633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 05/06/2022] [Accepted: 05/13/2022] [Indexed: 12/10/2022] Open
Abstract
The human body is endowed with an extraordinary ability to maintain different oxygen levels in various tissues and organs. The maintenance of physiological levels of oxygen is known as physoxia. The development of hypoxic conditions plays an important role in the biology of several pathologies, including cancer. In vitro studies using normal and neoplastic cells require that culture conditions be carried out under appropriate oxygen levels, either physoxic or hypoxic conditions. Such requirements are difficult to widely implement in laboratory practice, mainly due to the high costs of specialized equipment. In this work, we present and characterize a cost-effective method to culture cells under a range of oxygen levels using deoxidizing pouches. Our results show that physoxic and hypoxic levels using deoxidizing absorbers can be achieved either by implementing a gradual change in oxygen levels or by a regimen of acute depletion of oxygen. This approach triggers the activation of an epithelial-mesenchymal transition in cancer cells while stimulating the expression of HIF-1α. Culturing cancer cells with deoxidizing agent pouches revealed PI3K oncogenic pathway exacerbations compared to tumor cells growing under atmospheric levels of oxygen. Similar to the PI3K signaling disturbance, we also observed augmented oxidative stress and superoxide levels and increased cell cycle arrest. Most interestingly, the culture of cancer cells under hypoxia resulted in the accumulation of cancer stem cells in a time-dependent manner. Overall, we present an attractive, cost-effective method of culturing cells under appropriate physoxic or hypoxic conditions that is easily implementable in any wet laboratory equipped with cell culture tools.
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Affiliation(s)
- Carlos H. V. Nascimento-Filho
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109-1078, USA; (C.H.V.N.-F.); (A.T.G.); (Y.J.); (C.H.S.)
| | - Alexandra T. Glinos
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109-1078, USA; (C.H.V.N.-F.); (A.T.G.); (Y.J.); (C.H.S.)
| | - Yeejin Jang
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109-1078, USA; (C.H.V.N.-F.); (A.T.G.); (Y.J.); (C.H.S.)
| | - Eny M. Goloni-Bertollo
- Genetics and Molecular Biology Research Unit (UPGEM), Department of Molecular Biology, School of Medicine of São José do Rio Preto, São José do Rio Preto 15090-000, SP, Brazil;
| | - Rogerio M. Castilho
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109-1078, USA; (C.H.V.N.-F.); (A.T.G.); (Y.J.); (C.H.S.)
- Rogel Cancer Center, University of Michigan, Ann Arbor, MI 48109-0944, USA
- Correspondence:
| | - Cristiane H. Squarize
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109-1078, USA; (C.H.V.N.-F.); (A.T.G.); (Y.J.); (C.H.S.)
- Rogel Cancer Center, University of Michigan, Ann Arbor, MI 48109-0944, USA
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12
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Silva LC, Borgato GB, Wagner VP, Martins MD, Rocha GZ, Lopes MA, Santos-Silva AR, de Castro Júnior G, Kowalski LP, Nor JE, Squarize CH, Castilho RM, Vargas PA. Cephaeline is an inductor of histone H3 acetylation and inhibitor of mucoepidermoid carcinoma cancer stem cells. J Oral Pathol Med 2021; 51:553-562. [PMID: 34661317 DOI: 10.1111/jop.13252] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 07/21/2021] [Accepted: 09/08/2021] [Indexed: 01/02/2023]
Abstract
AIM To evaluate the potential use of Cephaeline as a therapeutic strategy to manage mucoepidermoid carcinomas (MEC) of the salivary glands. MATERIAL AND METHODS UM-HMC-1, UM-HMC-2, and UM-HMC-3A MEC cell lines were used to establish the effects of Cephaeline over tumor viability determined by MTT assay. In vitro wound healing scratch assays were performed to address cellular migration while immunofluorescence staining for histone H3 lysine 9 (H3k9ac) was used to identify the acetylation status of tumor cells upon Cephaeline administration. The presence of cancer stem cells was evaluated by the identification of ALDH enzymatic activity by flow cytometry and through functional assays using in vitro tumorsphere formation. RESULTS A single administration of Cephaeline resulted in reduced viability of MEC cells along with the halt on tumor growth and cellular migration potential. Administration of Cephaeline resulted in chromatin histone acetylation as judged by the increased levels of H3K9ac and disruption of tumorspheres formation. Interestingly, ALDH levels were increased in UM-HMC-1 and UM-HMC-3A cell lines, while UM-HMC-2 showed a reduced enzymatic activity. CONCLUSION Cephaeline has shown anti-cancer properties in all MEC cell lines tested by regulating tumor cells' viability, migration, proliferation, and disrupting the ability of cancer cells to generate tumorspheres.
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Affiliation(s)
- Luan César Silva
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, São Paulo, Brazil
| | | | - Vivian Petersen Wagner
- Academic Unit of Oral and Maxillofacial Medicine and Pathology, Department of Clinical Dentistry, University of Sheffield, Sheffield, UK
| | - Manoela Domingues Martins
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, São Paulo, Brazil.,Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Guilherme Zweig Rocha
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, São Paulo, Brazil
| | - Márcio Ajudarte Lopes
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, São Paulo, Brazil
| | - Alan Roger Santos-Silva
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, São Paulo, Brazil
| | - Gilberto de Castro Júnior
- Clinical Oncology Service, São Paulo State Cancer Institute (ICESP), School of Medicine of the University of São Paulo, São Paulo, Brazil
| | - Luiz Paulo Kowalski
- Department of Head and Neck Surgery, Faculty of Medicine, Head and Neck Surgery and Otorhinolaryngology Department, A C Camargo Cancer Center, Universidade de São Paulo, São Paulo, Brazil
| | - Jacques E Nor
- Department of Cariology, Restorative Sciences, Endodontics, School of Dentistry, University of Michigan, Ann Arbor, Michigan, USA
| | - Cristiane H Squarize
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
| | - Rogerio Moraes Castilho
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
| | - Pablo Agustin Vargas
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, São Paulo, Brazil
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13
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Guadiana D, Kavanagh NM, Squarize CH. Oral health care professionals recommending and administering the HPV vaccine: Understanding the strengths and assessing the barriers. PLoS One 2021; 16:e0248047. [PMID: 33662007 PMCID: PMC7932114 DOI: 10.1371/journal.pone.0248047] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 02/19/2021] [Indexed: 11/18/2022] Open
Abstract
Introduction Head and neck cancer is a deadly cancer that ranks among the six most common cancers worldwide. The HPV vaccine has been used to prevent head and neck cancer of the oropharynx, and changes in health policies and state law are impacting the role of dental professionals in HPV vaccination. However, relatively little is known about dental professionals’ attitudes regarding the vaccine. Objectives Our study assesses dental professionals’ willingness to administer the HPV vaccine, their confidence discussing HPV with patients, beliefs about the vaccine’s efficacy, perceived barriers to administering it, and sites of referral. Methods We surveyed 623 dental professionals, including dentists, hygienists, dental students, and hygiene students across Michigan. Attitudes toward the vaccine and predictive characteristics were evaluated by logistic regression, ANOVAs, and t-tests. Results The majority of the respondents (51% of dentists, 63% of hygienists, 82% of dental students, and 71% of hygiene students) were willing to administer the HPV vaccine if allowed by law. The role of dental and dental hygiene students would be one of advocacy, educating and recommending the vaccine, and the dental students administering it once licensed. Dental professionals were variably confident discussing HPV with patients and generally believed it enhanced patients’ health. Stronger confidence and beliefs were associated with greater willingness to administer the vaccine. Barriers among professionals opposing the HPV vaccine included lack of knowledge on the subject, liability concerns, and personal beliefs. Conclusion Dental professionals can become leaders in preventing HPV-related cancers. Training and continuing education courses could enhance their confidence and willingness to recommend and administer the HPV vaccine. Policy implications Legislation that permits dental professionals to administer the vaccine could increase the vaccine’s accessibility to patients, improve vaccination rates, and population health.
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Affiliation(s)
- Denise Guadiana
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, Michigan, United States of America
| | - Nolan M. Kavanagh
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, Michigan, United States of America
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Cristiane H. Squarize
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, Michigan, United States of America
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, Michigan, United States of America
- University of Michigan Rogel Cancer Center, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
- * E-mail:
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14
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Martins MD, Silveira FM, Martins MAT, Almeida LO, Bagnato VS, Squarize CH, Castilho RM. Photobiomodulation therapy drives massive epigenetic histone modifications, stem cells mobilization and accelerated epithelial healing. J Biophotonics 2021; 14:e202000274. [PMID: 33025746 DOI: 10.1002/jbio.202000274] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 09/25/2020] [Accepted: 09/29/2020] [Indexed: 06/11/2023]
Abstract
Emerging evidence indicates the clinical benefits of photobiomodulation therapy (PBMT) in the management of skin and mucosal wounds. Here, we decided to explore the effects of different regiments of PBMT on epithelial cells and stem cells, and the potential implications over the epigenetic circuitry during healing. Scratch-wound migration, immunofluorescence (anti-acetyl-Histone H3, anti-acetyl-CBP/p300 and anti-BMI1), nuclear morphometry and western blotting (anti-Phospho-S6, anti-methyl-CpG binding domain protein 2 [MBD2]) were performed. Epithelial stem cells were identified by the aldehyde dehydrogenase enzymatic levels and sphere-forming assay. We observed that PBMT-induced accelerated epithelial migration and chromatin relaxation along with increased levels of histones acetylation, the transcription cofactors CBP/p300 and mammalian target of rapamycin. We further observed a reduction of the transcription repression-associated protein MBD2 and a reduced number of epithelial stem cells and spheres. In this study, we showed that PBMT could induce epigenetic modifications of epithelial cells and control stem cell fate, leading to an accelerated healing phenotype.
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Affiliation(s)
- Manoela D Martins
- Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, Brazil
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
| | - Felipe Martins Silveira
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, Brazil
| | - Marco A T Martins
- Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
- Department of Oral Medicine, Hospital de Clínicas de Porto Alegre (HCPA/UFRGS), Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Luciana O Almeida
- Laboratory of Tissue Culture, Department of Basic and Oral Biology, University of Sao Paulo School of Dentistry, Ribeirao Preto, Rio Grande do Sul, Brazil
| | - Vanderlei S Bagnato
- São Carlos Institute of Physics, University of São Paulo (USP), São Carlos, São Paulo, Brazil
| | - Cristiane H Squarize
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
| | - Rogerio M Castilho
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
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15
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Marques AEM, do Nascimento Filho CHV, Marinho Bezerra TM, Guerra ENS, Castilho RM, Squarize CH. Entinostat is a novel therapeutic agent to treat oral squamous cell carcinoma. J Oral Pathol Med 2020; 49:771-779. [PMID: 32450006 DOI: 10.1111/jop.13039] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 03/18/2020] [Accepted: 05/07/2020] [Indexed: 01/01/2023]
Abstract
INTRODUCTION Alterations of the epigenome may influence cancer initiation and progression. At the cellular level, histones are key regulators of chromatin accessibility and gene transcription; thus, the inhibition of histone deacetylase enzymes (HDACs) constitutes an attractive target for therapy. In this study, we investigated the effects of the HDAC inhibitor entinostat on oral squamous cell carcinoma (OSCC). MATERIALS AND METHODS We tested the effects of entinostat on OSCC cell lines. Cell viability and growth were analyzed using MTT assay. Cell cycle analysis, cell apoptosis, cancer stem cell (CSC) content, and the concentration of reactive oxygen species (ROS) in OSCC tumor cells were assessed using flow cytometry. The expression of histones and cell cycle regulatory proteins was examined by Western blot. RESULTS The administration of entinostat resulted in reduced proliferation of OSCC cells, followed by cell cycle arrest at the G0/G1 phase, as well as substantial tumor apoptosis. We found an increase in ROS production and significant reductions in CSCs. We also found that entinostat caused increased acetylation histone H3 and histone H4, and changes in the expression of cell cycle-associated proteins such as p21. CONCLUSION This study indicates that entinostat is a potential novel therapeutic agent for OSCC by halting tumor proliferation, inducing cytotoxicity and intracellular ROS, and attacking the CSCs.
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Affiliation(s)
- Ana Elizia M Marques
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, Division of Oral Pathology Oral Radiology and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA.,Laboratory of Oral Histopathology, Health Sciences Faculty, University of Brasilia, Brasilia, Brazil
| | - Carlos Henrique V do Nascimento Filho
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, Division of Oral Pathology Oral Radiology and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - Thamara M Marinho Bezerra
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, Division of Oral Pathology Oral Radiology and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA.,School of Pharmacy, Dentistry and Nursing, Federal University of Ceara, Fortaleza, Brazil
| | - Eliete N S Guerra
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, Division of Oral Pathology Oral Radiology and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA.,Laboratory of Oral Histopathology, Health Sciences Faculty, University of Brasilia, Brasilia, Brazil
| | - Rogerio M Castilho
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, Division of Oral Pathology Oral Radiology and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA.,The University of Michigan Rogel Cancer Center, Ann Arbor, MI, USA
| | - Cristiane H Squarize
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, Division of Oral Pathology Oral Radiology and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA.,The University of Michigan Rogel Cancer Center, Ann Arbor, MI, USA
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16
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Borges GA, Webber LP, M Marques AE, Guerra EN, Castilho RM, Squarize CH. Pharmacological PTEN inhibition: potential clinical applications and effects in tissue regeneration. Regen Med 2020; 15:1329-1344. [PMID: 32223643 DOI: 10.2217/rme-2019-0065] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Although the human body can heal, it takes time, and slow healing and chronic wounds often occur. Thus, identifying novel therapies to aid regeneration is needed. Here, we conducted a systematic review following the Preferred Reporting Items for Systematic Reviews guidelines and assessed preclinical studies on phosphatase and tensin homolog (PTEN) inhibitors and their effects on tissue repair and regeneration. In conditions associated with neurodegeneration, tissue injury and ischemia, the PTEN-regulated PI3K/AKT signaling pathway is activated. The use of PTEN inhibitors resulted in better tissue response by reducing the healing time and lesion sizes or inducing neuronal regeneration. Notably, all studies included in this systematic review indicated that pharmacological inhibition of PTEN enhanced the repair process of the eye, lung, muscle and nervous system.
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Affiliation(s)
- Gabriel A Borges
- Laboratory of Epithelial Biology, Department of Periodontics & Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109-1078, USA.,Laboratory of Oral Histopathology, Health Sciences Faculty, University of Brasília, Brasília, Brazil
| | - Liana P Webber
- Laboratory of Epithelial Biology, Department of Periodontics & Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109-1078, USA
| | - Ana Elizia M Marques
- Laboratory of Epithelial Biology, Department of Periodontics & Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109-1078, USA.,Laboratory of Oral Histopathology, Health Sciences Faculty, University of Brasília, Brasília, Brazil
| | - Eliete Ns Guerra
- Laboratory of Epithelial Biology, Department of Periodontics & Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109-1078, USA.,Laboratory of Oral Histopathology, Health Sciences Faculty, University of Brasília, Brasília, Brazil
| | - Rogerio M Castilho
- Laboratory of Epithelial Biology, Department of Periodontics & Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109-1078, USA.,The Michigan Medicine Rogel Cancer Center, University of Michigan, Ann Arbor, MI 48109, USA
| | - Cristiane H Squarize
- Laboratory of Epithelial Biology, Department of Periodontics & Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109-1078, USA.,The Michigan Medicine Rogel Cancer Center, University of Michigan, Ann Arbor, MI 48109, USA
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17
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Nascimento-Filho CHV, Silveira EJD, Goloni-Bertollo EM, de Souza LB, Squarize CH, Castilho RM. Skin wound healing triggers epigenetic modifications of histone H4. J Transl Med 2020; 18:138. [PMID: 32216808 PMCID: PMC7098159 DOI: 10.1186/s12967-020-02303-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 03/14/2020] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND The skin is the largest organ of the human body. Upon injury, the skin triggers a sequence of signaling pathways that induce epithelial proliferation, migration, and ultimately, the re-establishment of the epithelial barrier. Our study explores the unknown epigenetic regulations of wound healing from a histone perspective. Posttranslational modifications of histones enhance chromatin accessibility and modify gene transcription. METHODS Full-thickness wounds were made in the dorsal skin of twenty-four C57/B6 mice (C57BL/6J), followed by the use of ring-shaped silicone splints to prevent wound contraction. Tissue samples were collected at three time points (post-operatory day 1, 4, and 9), and processed for histology. Immunofluorescence was performed in all-time points using markers for histone H4 acetylation at lysines K5, K8, K12, and K16. RESULTS We found well-defined histone modifications associated with the stages of healing. Most exciting, we showed that the epidermis located at a distance from the wound demonstrated changes in histone acetylation, particularly the deacetylation of histone H4K5, H4K8, and H4K16, and hyperacetylation of H4K12. The epidermis adjacent to the wound revealed the deacetylation of H4K5 and H4K8 and hyperacetylation of H4K12. Conversely, the migratory epithelium (epithelial tongue) displayed significant acetylation of H4K5 and H4K12. The H4K5 and H4K8 were decreased in the newly formed epidermis, which continued to display high levels of H4K12 and H4K16. CONCLUSIONS This study profiles the changes in histone H4 acetylation in response to injury. In addition to the epigenetic changes found in the healing tissue, these changes also took place in tissues adjacent and distant to the wound. Furthermore, not only deacetylation but also hyperacetylation occurred during tissue repair and regeneration.
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Affiliation(s)
- Carlos H V Nascimento-Filho
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan, School of Dentistry, Ann Arbor, MI, USA
| | - Ericka J D Silveira
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan, School of Dentistry, Ann Arbor, MI, USA.,Department of Oral Pathology, Federal University of Rio Grande do Norte, Natal, RN, Brazil
| | - Eny M Goloni-Bertollo
- Genetics and Molecular Biology Research Unit, Department of Molecular Biology, School of Medicine of São José do Rio Preto, São José do Rio Preto, SP, Brazil
| | - Lelia Batista de Souza
- Department of Oral Pathology, Federal University of Rio Grande do Norte, Natal, RN, Brazil
| | - Cristiane H Squarize
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan, School of Dentistry, Ann Arbor, MI, USA. .,Michigan Medicine Rogel Cancer Center, University of Michigan, Ann Arbor, MI, USA.
| | - Rogerio M Castilho
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan, School of Dentistry, Ann Arbor, MI, USA. .,Michigan Medicine Rogel Cancer Center, University of Michigan, Ann Arbor, MI, USA.
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18
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Silveira EJD, Nascimento Filho CHV, Yujra VQ, Webber LP, Castilho RM, Squarize CH. BMAL1 Modulates Epidermal Healing in a Process Involving the Antioxidative Defense Mechanism. Int J Mol Sci 2020; 21:E901. [PMID: 32019183 PMCID: PMC7038047 DOI: 10.3390/ijms21030901] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 01/23/2020] [Accepted: 01/27/2020] [Indexed: 02/03/2023] Open
Abstract
The circadian rhythm regulates the physiology and behavior of living organisms in a time-dependent manner. Clock genes have distinct roles including the control over gene expression mediated by the transcriptional activators CLOCK and BMAL1, and the suppression of gene expression mediated by the transcriptional repressors PER1/2 and CRY1/2. The balance between gene expression and repression is key to the maintenance of tissue homeostasis that is disrupted in the event of an injury. In the skin, a compromised epithelial barrier triggers a cascade of events that culminate in the mobilization of epithelial cells and stem cells. Recruited epithelial cells migrate towards the wound and reestablish the protective epithelial layer of the skin. Although we have recently demonstrated the involvement of BMAL and the PI3K signaling in wound healing, the role of the circadian clock genes in tissue repair remains poorly understood. Here, we sought to understand the role of BMAL1 on skin healing in response to injury. We found that genetic depletion of BMAL1 resulted in delayed healing of the skin as compared to wild-type control mice. Furthermore, we found that loss of Bmal1 was associated with the accumulation of Reactive Oxygen Species Modulator 1 (ROMO1), a protein responsible for inducing the production of intracellular reactive oxygen species (ROS). The slow healing was associated with ROS and superoxide dismutase (SOD) production, and pharmacological inhibition of the oxidative stress signaling (ROS/SOD) led to cellular proliferation, upregulation of Sirtuin 1 (SIRT1), and rescued the skin healing phenotype of Bmal1-/- mice. Overall, our study points to BMAL1 as a key player in tissue regeneration and as a critical regulator of ROMO1 and oxidative stress in the skin.
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Affiliation(s)
- Ericka J. D. Silveira
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109, USA; (E.J.D.S.); (C.H.V.N.F.); (V.Q.Y.); (L.P.W.); (R.M.C.)
- Odontology Sciences Postgraduate Program, Dentistry Department, Federal University of Rio Grande do Norte, Natal 59056, RN, Brazil
| | - Carlos H. V. Nascimento Filho
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109, USA; (E.J.D.S.); (C.H.V.N.F.); (V.Q.Y.); (L.P.W.); (R.M.C.)
| | - Veronica Q. Yujra
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109, USA; (E.J.D.S.); (C.H.V.N.F.); (V.Q.Y.); (L.P.W.); (R.M.C.)
| | - Liana P. Webber
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109, USA; (E.J.D.S.); (C.H.V.N.F.); (V.Q.Y.); (L.P.W.); (R.M.C.)
| | - Rogerio M. Castilho
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109, USA; (E.J.D.S.); (C.H.V.N.F.); (V.Q.Y.); (L.P.W.); (R.M.C.)
- The Michigan Medicine Rogel Cancer Center, University of Michigan, Ann Arbor, MI 48109, USA
| | - Cristiane H. Squarize
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109, USA; (E.J.D.S.); (C.H.V.N.F.); (V.Q.Y.); (L.P.W.); (R.M.C.)
- The Michigan Medicine Rogel Cancer Center, University of Michigan, Ann Arbor, MI 48109, USA
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19
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Borges GÁ, Elias ST, Araujo TSD, Souza PM, Nascimento-Filho CHV, Castilho RM, Squarize CH, Magalhães PDO, Guerra ENS. Asparaginase induces selective dose- and time-dependent cytotoxicity, apoptosis, and reduction of NFκB expression in oral cancer cells. Clin Exp Pharmacol Physiol 2020; 47:857-866. [PMID: 31943292 DOI: 10.1111/1440-1681.13256] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 11/19/2019] [Accepted: 01/08/2020] [Indexed: 01/10/2023]
Abstract
Asparaginase is fundamental to the treatment of haematological malignancies. However, little has been studied on the effects that asparaginase could exert on solid tumours. Thus, this study aimed to evaluate the effects of asparaginase on an oral carcinoma cell line. The cytotoxicity of asparaginase in SCC-9 (tongue squamous cell carcinoma) and HaCaT (human keratinocyte) cell lines was evaluated with MTT cell viability assay. The cells were treated with asparaginase at 0.04, 0.16, 0.63, 1.0, 1.5, 2.5, and 5.0 IU/mL. Dose-response curves and IC50 values were obtained and the Tumour Selectivity Index (TSI) was calculated. The effect of asparaginase on procaspase-3 and nuclear factor κB (NFκB) expression was evaluated with western blot because it was reported that the overexpression of NFκB has been shown to contribute to tumour cell survival, proliferation, and migration. Caspase 3/7 staining was performed to identify cell death using flow cytometry. Effective asparaginase concentrations were lower for SCC-9 cells when compared to HaCaT cells. The cytotoxicity results at 48 and 72 hours were significantly different for SCC-9 cells. The TSI indicated that asparaginase was selective for the tumour cells. A decrease in procaspase-3 and NFκB protein levels was observed in SCC-9 cells. Furthermore, asparaginase resulted in significant apoptosis after 48 and 72 hours. Based on these results, asparaginase was cytotoxic in a dose- and time-dependent manner, induces apoptosis, and reduces NFκB expression in oral cancer cells. These results encourage further studies on the effectiveness of this enzyme as a treatment for solid tumours, especially head and neck cancer.
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Affiliation(s)
- Gabriel Álvares Borges
- Laboratory of Oral Histopathology, Faculty of Health Sciences, University of Brasilia, Brasilia, Brazil.,Epithelial Biology Laboratory, Department of Periodontics and Oral Medicine, Division of Oral Pathology Oral Radiology and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - Silvia Taveira Elias
- Laboratory of Oral Histopathology, Faculty of Health Sciences, University of Brasilia, Brasilia, Brazil
| | - Tassiana Souza De Araujo
- Laboratory of Oral Histopathology, Faculty of Health Sciences, University of Brasilia, Brasilia, Brazil
| | - Paula Monteiro Souza
- Natural Products Laboratory, Faculty of Health Sciences, University of Brasilia, Brasilia, Brazil
| | - Carlos Henrique Viesi Nascimento-Filho
- Epithelial Biology Laboratory, Department of Periodontics and Oral Medicine, Division of Oral Pathology Oral Radiology and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - Rogerio M Castilho
- Epithelial Biology Laboratory, Department of Periodontics and Oral Medicine, Division of Oral Pathology Oral Radiology and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - Cristiane H Squarize
- Epithelial Biology Laboratory, Department of Periodontics and Oral Medicine, Division of Oral Pathology Oral Radiology and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | | | - Eliete Neves Silva Guerra
- Laboratory of Oral Histopathology, Faculty of Health Sciences, University of Brasilia, Brasilia, Brazil.,Epithelial Biology Laboratory, Department of Periodontics and Oral Medicine, Division of Oral Pathology Oral Radiology and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
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20
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Fretwurst T, Garaicoa‐Pazmino C, Nelson K, Giannobile WV, Squarize CH, Larsson L, Castilho RM. Characterization of macrophages infiltrating peri‐implantitis lesions. Clin Oral Implants Res 2020; 31:274-281. [DOI: 10.1111/clr.13568] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 12/09/2019] [Accepted: 12/17/2019] [Indexed: 12/25/2022]
Affiliation(s)
- Tobias Fretwurst
- Department of Periodontics and Oral Medicine University of Michigan School of Dentistry Ann Arbor MI USA
- Department of Oral‐ and Maxillofacial Surgery Medical Center – University of Freiburg Faculty of Medicine University of Freiburg Germany
- Laboratory of Epithelial Biology Department of Periodontics and Oral Medicine University of Michigan School Ann Arbor MI USA
| | - Carlos Garaicoa‐Pazmino
- Department of Periodontology School of Dentistry Oregon Health & Science University Portland OR USA
- Laboratory of Epithelial Biology Department of Periodontics and Oral Medicine University of Michigan School Ann Arbor MI USA
| | - Katja Nelson
- Department of Oral‐ and Maxillofacial Surgery Medical Center – University of Freiburg Faculty of Medicine University of Freiburg Germany
| | - William V. Giannobile
- Department of Periodontics and Oral Medicine University of Michigan School of Dentistry Ann Arbor MI USA
| | - Cristiane H. Squarize
- Department of Periodontics and Oral Medicine University of Michigan School of Dentistry Ann Arbor MI USA
- Laboratory of Epithelial Biology Department of Periodontics and Oral Medicine University of Michigan School Ann Arbor MI USA
| | - Lena Larsson
- Department of Periodontics and Oral Medicine University of Michigan School of Dentistry Ann Arbor MI USA
- Department of Periodontology Institute of Odontology University of Gothenburg Gothenburg Sweden
| | - Rogerio M. Castilho
- Department of Periodontics and Oral Medicine University of Michigan School of Dentistry Ann Arbor MI USA
- Laboratory of Epithelial Biology Department of Periodontics and Oral Medicine University of Michigan School Ann Arbor MI USA
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21
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Nascimento-Filho CHV, Webber LP, Borgato GB, Goloni-Bertollo EM, Squarize CH, Castilho RM. Hypoxic niches are endowed with a protumorigenic mechanism that supersedes the protective function of PTEN. FASEB J 2019; 33:13435-13449. [PMID: 31560860 DOI: 10.1096/fj.201900722r] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Head and neck squamous cell carcinoma (HNSCC) is the sixth most common malignancy worldwide and is characterized by a fast-paced growth. Like other solid tumors, the HNSCC growth rate results in the development of hypoxic regions identified by the expression of hypoxia-inducible factor 1α (HIF-1α). Interestingly, clinical data have shown that pharmacological induction of intratumoral hypoxia caused an unexpected rise in tumor metastasis and the accumulation of cancer stem cells (CSCs). However, little is known on the molecular circuitries involved in the presence of intratumoral hypoxia and the augmented population of CSCs. Here we explore the impact of hypoxia on the behavior of HNSCC and define that the controlling function of phosphatase and tensin homolog (PTEN) over HIF-1α expression and CSC accumulation are de-regulated during hypoxic events. Our findings indicate that hypoxic niches are poised to accumulate CSCs in a molecular process driven by the loss of PTEN activity. Furthermore, our data suggest that targeted therapies aiming at the PTEN/PI3K signaling may constitute an effective strategy to counteract the development of intratumoral hypoxia and the accumulation of CSCs.-Nascimento-Filho, C. H. V., Webber, L. P., Borgato, G. B., Goloni-Bertollo, E. M., Squarize, C. H., Castilho, R. M. Hypoxic niches are endowed with a protumorigenic mechanism that supersedes the protective function of PTEN.
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Affiliation(s)
- Carlos H V Nascimento-Filho
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, Michigan, USA.,Genetics and Molecular Biology Research Unit, Department of Molecular Biology, School of Medicine of São José do Rio Preto, São Paulo, Brazil
| | - Liana P Webber
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, Michigan, USA.,Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Gabriell B Borgato
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, Michigan, USA.,Department of Oral Biology, School of Dentistry, State University of Campinas, Piracicaba, São Paulo, Brazil
| | - Eny M Goloni-Bertollo
- Genetics and Molecular Biology Research Unit, Department of Molecular Biology, School of Medicine of São José do Rio Preto, São Paulo, Brazil
| | - Cristiane H Squarize
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, Michigan, USA.,University of Michigan Comprehensive Cancer Center, Ann Arbor, Michigan, USA
| | - Rogerio M Castilho
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, Michigan, USA.,University of Michigan Comprehensive Cancer Center, Ann Arbor, Michigan, USA
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22
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Webber LP, Yip B, Nascimento Filho CHVD, Park HB, Castilho RM, Squarize CH. Topical delivery of mTOR inhibitor halts scarring. J Dermatol Sci 2019; 95:76-79. [PMID: 31324514 DOI: 10.1016/j.jdermsci.2019.06.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 06/15/2019] [Accepted: 06/27/2019] [Indexed: 12/13/2022]
Affiliation(s)
- Liana P Webber
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, 48109-1078, USA
| | - Brian Yip
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, 48109-1078, USA
| | - Carlos H V do Nascimento Filho
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, 48109-1078, USA
| | - Ha B Park
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, 48109-1078, USA
| | - Rogerio M Castilho
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, 48109-1078, USA; The Michigan Medicine Rogel Cancer Center, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Cristiane H Squarize
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, 48109-1078, USA; The Michigan Medicine Rogel Cancer Center, University of Michigan, Ann Arbor, MI, 48109, USA.
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23
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Garaicoa‐Pazmino C, Fretwurst T, Squarize CH, Berglundh T, Giannobile WV, Larsson L, Castilho RM. Characterization of macrophage polarization in periodontal disease. J Clin Periodontol 2019; 46:830-839. [DOI: 10.1111/jcpe.13156] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 04/12/2019] [Accepted: 05/20/2019] [Indexed: 11/29/2022]
Affiliation(s)
- Carlos Garaicoa‐Pazmino
- Department of Periodontics and Oral Medicine University of Michigan School of Dentistry Ann Arbor Michigan USA
| | - Tobias Fretwurst
- Department of Periodontics and Oral Medicine University of Michigan School of Dentistry Ann Arbor Michigan USA
- Department of Oral and Craniomaxillofacial Surgery, Center for Dental Medicine University Medical Center Freiburg Freiburg Germany
| | - Cristiane H. Squarize
- Department of Periodontics and Oral Medicine University of Michigan School of Dentistry Ann Arbor Michigan USA
- Laboratory of Epithelial Biology University of Michigan School of Dentistry Ann Arbor Michigan USA
| | - Tord Berglundh
- Department of Periodontology Institute of Odontology, The Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
| | - William V. Giannobile
- Department of Periodontics and Oral Medicine University of Michigan School of Dentistry Ann Arbor Michigan USA
- Department of Biomedical Engineering, College of Engineering and Biointerfaces Institute University of Michigan Ann Arbor Michigan USA
| | - Lena Larsson
- Department of Periodontics and Oral Medicine University of Michigan School of Dentistry Ann Arbor Michigan USA
- Department of Periodontology Institute of Odontology, The Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
| | - Rogerio M. Castilho
- Department of Periodontics and Oral Medicine University of Michigan School of Dentistry Ann Arbor Michigan USA
- Laboratory of Epithelial Biology University of Michigan School of Dentistry Ann Arbor Michigan USA
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24
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Suárez-López del Amo F, Garaicoa-Pazmiño C, Fretwurst T, Castilho RM, Squarize CH. Dental implants-associated release of titanium particles: A systematic review. Clin Oral Implants Res 2018; 29:1085-1100. [DOI: 10.1111/clr.13372] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 08/16/2018] [Accepted: 08/28/2018] [Indexed: 12/13/2022]
Affiliation(s)
- Fernando Suárez-López del Amo
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine; University of Michigan School; Ann Arbor Michigan
- Department of Periodontics; University of Oklahoma Health Sciences Center; Oklahoma City Oklahoma
| | - Carlos Garaicoa-Pazmiño
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine; University of Michigan School; Ann Arbor Michigan
- Department of Periodontics and Oral Medicine; University of Michigan School of Dentistry; Ann Arbor Michigan
| | - Tobias Fretwurst
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine; University of Michigan School; Ann Arbor Michigan
- Department of Oral and Craniomaxillofacial Surgery, Center for Dental Medicine; University Medical Center Freiburg; Freiburg Germany
| | - Rogerio M. Castilho
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine; University of Michigan School; Ann Arbor Michigan
- Department of Periodontics and Oral Medicine; University of Michigan School of Dentistry; Ann Arbor Michigan
| | - Cristiane H. Squarize
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine; University of Michigan School; Ann Arbor Michigan
- Department of Periodontics and Oral Medicine; University of Michigan School of Dentistry; Ann Arbor Michigan
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25
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Wagner VP, Martins MAT, Martins MD, Warner KA, Webber LP, Squarize CH, Nör JE, Castilho RM. Overcoming adaptive resistance in mucoepidermoid carcinoma through inhibition of the IKK-β/IκBα/NFκB axis. Oncotarget 2018; 7:73032-73044. [PMID: 27682876 PMCID: PMC5341961 DOI: 10.18632/oncotarget.12195] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 09/15/2016] [Indexed: 01/22/2023] Open
Abstract
Patients with mucoepidermoid carcinoma (MEC) experience low survival rates and high morbidity following treatment, yet the intrinsic resistance of MEC cells to ionizing radiation (IR) and the mechanisms underlying acquired resistance remain unexplored. Herein, we demonstrated that low doses of IR intrinsically activated NFκB in resistant MEC cell lines. Moreover, resistance was significantly enhanced in IR-sensitive cell lines when NFκB pathway was stimulated. Pharmacological inhibition of the IKK-β/IκBα/NFκB axis, using a single dose of FDA-approved Emetine, led to a striking sensitization of MEC cells to IR and a reduction in cancer stem cells. We achieved a major step towards better understanding the basic mechanisms involved in IR-adaptive resistance in MEC cell lines and how to efficiently overcome this critical problem.
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Affiliation(s)
- Vivian P Wagner
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA.,Experimental Pathology Unit, Clinics Hospital of Porto Alegre, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil.,Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Marco A T Martins
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA.,Experimental Pathology Unit, Clinics Hospital of Porto Alegre, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Manoela D Martins
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA.,Experimental Pathology Unit, Clinics Hospital of Porto Alegre, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil.,Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Kristy A Warner
- Department of Restorative Sciences, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - Liana P Webber
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA.,Experimental Pathology Unit, Clinics Hospital of Porto Alegre, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil.,Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Cristiane H Squarize
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA.,Comprehensive Cancer Center, University of Michigan Ann Arbor, MI, USA
| | - Jacques E Nör
- Department of Restorative Sciences, University of Michigan School of Dentistry, Ann Arbor, MI, USA.,Comprehensive Cancer Center, University of Michigan Ann Arbor, MI, USA.,Department of Otolaryngology, Medical School, University of Michigan, Ann Arbor, MI, USA.,Department of Biomedical Engineering, University of Michigan College of Engineering, Ann Arbor, MI, USA
| | - Rogerio M Castilho
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA.,Comprehensive Cancer Center, University of Michigan Ann Arbor, MI, USA
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26
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Wagner VP, Martins MD, Martins MAT, Almeida LO, Warner KA, Nör JE, Squarize CH, Castilho RM. Targeting histone deacetylase and NFκB signaling as a novel therapy for Mucoepidermoid Carcinomas. Sci Rep 2018; 8:2065. [PMID: 29391537 PMCID: PMC5794736 DOI: 10.1038/s41598-018-20345-w] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Accepted: 01/15/2018] [Indexed: 02/06/2023] Open
Abstract
Malignancies from the salivary glands are rare and represent 11% of all cancers from the oropharyngeal anatomical area. Mucoepidermoid Carcinomas (MEC) is the most common malignancy from the salivary glands. Low survival rates of high-grade Mucoepidermoid Carcinomas (MEC) are particularly associated with the presence of positive lymph nodes, extracapsular lymph node spread, and perineural invasion. Most recently, the presence of cancer stem cells (CSC), and the activation of the NFκB signaling pathway have been suggested as cues for an acquired resistance phenotype. We have previously shown that NFκB signaling is very active in MEC tumors. Herein, we explore the efficacy of NFκB inhibition in combination with class I and II HDAC inhibitor to deplete the population of CSC and to destroy MEC tumor cells. Our finding suggests that disruption of NFκB signaling along with the administration of HDAC inhibitors constitute an effective strategy to manage MEC tumors.
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Affiliation(s)
- Vivian P Wagner
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, 48109-1078, USA.,Experimental Pathology Unit, Clinics Hospital of Porto Alegre, Federal University of Rio Grande do Sul, Porto Alegre, RS, 90035-003, Brazil.,Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, RS, 90035-003, Brazil
| | - Manoela D Martins
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, 48109-1078, USA.,Experimental Pathology Unit, Clinics Hospital of Porto Alegre, Federal University of Rio Grande do Sul, Porto Alegre, RS, 90035-003, Brazil.,Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, RS, 90035-003, Brazil
| | - Marco A T Martins
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, 48109-1078, USA.,Experimental Pathology Unit, Clinics Hospital of Porto Alegre, Federal University of Rio Grande do Sul, Porto Alegre, RS, 90035-003, Brazil
| | - Luciana O Almeida
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, 48109-1078, USA
| | - Kristy A Warner
- Department of Restorative Sciences, University of Michigan School of Dentistry, Ann Arbor, MI, 48109, USA
| | - Jacques E Nör
- Department of Restorative Sciences, University of Michigan School of Dentistry, Ann Arbor, MI, 48109, USA.,Comprehensive Cancer Center, University of Michigan, Ann Arbor, MI, 48109, USA.,Department of Otolaryngology, Medical School, University of Michigan, Ann Arbor, MI, USA.,Department of Biomedical Engineering, University of Michigan College of Engineering, Ann Arbor, Michigan, USA
| | - Cristiane H Squarize
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, 48109-1078, USA.,Comprehensive Cancer Center, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Rogerio M Castilho
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, 48109-1078, USA. .,Comprehensive Cancer Center, University of Michigan, Ann Arbor, MI, 48109, USA.
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27
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Guimarães DM, Almeida LO, Martins MD, Warner KA, Silva ARS, Vargas PA, Nunes FD, Squarize CH, Nör JE, Castilho RM. Sensitizing mucoepidermoid carcinomas to chemotherapy by targeted disruption of cancer stem cells. Oncotarget 2018; 7:42447-42460. [PMID: 27285758 PMCID: PMC5173147 DOI: 10.18632/oncotarget.9884] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Accepted: 05/15/2016] [Indexed: 12/23/2022] Open
Abstract
Mucoepidermoid carcinoma (MEC) is the most common malignancy of salivary glands. The response of MEC to chemotherapy is unpredictable, and recent advances in cancer biology suggest the involvement of cancer stem cells (CSCs) in tumor progression and chemoresistance and radioresistance phenotype. We found that histone acetyltransferase inhibitors (HDACi) were capable of disrupting CSCs in MEC. Furthermore, administration of HDACi prior to Cisplatin (two-hit approach) disrupts CSCs and sensitizes tumor cells to Cisplatin. Our findings corroborate to emerging evidence that CSCs play a key role in tumor resistance to chemotherapy, and highlights a pharmacological two-hit approach that disrupts tumor resistance to conventional therapy.
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Affiliation(s)
- Douglas M Guimarães
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan, School of Dentistry, Ann Arbor, MI, USA.,Department of Oral Pathology, School of Dentistry, University of Sao Paulo, SP, Brazil
| | - Luciana O Almeida
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan, School of Dentistry, Ann Arbor, MI, USA
| | - Manoela D Martins
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan, School of Dentistry, Ann Arbor, MI, USA.,Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Kristy A Warner
- Department of Restorative Sciences, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - Alan R S Silva
- Department of Oral Diagnosis, Piracicaba Dental School, State University of Campinas, Campinas, SP, Brazil
| | - Pablo A Vargas
- Department of Oral Diagnosis, Piracicaba Dental School, State University of Campinas, Campinas, SP, Brazil
| | - Fabio D Nunes
- Department of Oral Pathology, School of Dentistry, University of Sao Paulo, SP, Brazil
| | - Cristiane H Squarize
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan, School of Dentistry, Ann Arbor, MI, USA.,Comprehensive Cancer Center, University of Michigan, Ann Arbor, MI, USA
| | - Jacques E Nör
- Department of Otolaryngology, Medical School, University of Michigan, Ann Arbor, MI, USA.,Department of Restorative Sciences, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - Rogerio M Castilho
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan, School of Dentistry, Ann Arbor, MI, USA
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28
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Zagni C, Almeida LO, Balan T, Martins MT, Rosselli-Murai LK, Papagerakis P, Castilho RM, Squarize CH. PTEN Mediates Activation of Core Clock Protein BMAL1 and Accumulation of Epidermal Stem Cells. Stem Cell Reports 2017; 9:304-314. [PMID: 28602615 PMCID: PMC5511049 DOI: 10.1016/j.stemcr.2017.05.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Revised: 05/02/2017] [Accepted: 05/03/2017] [Indexed: 12/17/2022] Open
Abstract
Tissue integrity requires constant maintenance of a quiescent, yet responsive, population of stem cells. In the skin, hair follicle stem cells (HFSCs) that reside within the bulge maintain tissue homeostasis in response to activating cues that occur with each new hair cycle or upon injury. We found that PTEN, a major regulator of the PI3K-AKT pathway, controlled HFSC number and size in the bulge and maintained genomically stable pluripotent cells. This regulatory function is central for HFSC quiescence, where PTEN-deficiency phenotype is in part regulated by BMAL1. Furthermore, PTEN ablation led to downregulation of BMI-1, a critical regulator of adult stem cell self-renewal, and elevated senescence, suggesting the presence of a protective system that prevents transformation. We found that short- and long-term PTEN depletion followed by activated BMAL1, a core clock protein, contributed to accumulation of HFSC. PTEN downregulation leads to the enrichment of stem cells in the niche PTEN activates core clock protein BMAL1 BMAL1 plays a role in PTEN-associated stem cell accumulation via AKT
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Affiliation(s)
- Chiara Zagni
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109-1078, USA
| | - Luciana O Almeida
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109-1078, USA
| | - Tarek Balan
- OPD, University of Michigan School of Dentistry, Ann Arbor, MI 48109-1078, USA
| | - Marco T Martins
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109-1078, USA
| | - Luciana K Rosselli-Murai
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109-1078, USA
| | - Petros Papagerakis
- OPD, University of Michigan School of Dentistry, Ann Arbor, MI 48109-1078, USA; Center for Organogenesis, University of Michigan, Ann Arbor, MI 48109-2200, USA
| | - Rogerio M Castilho
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109-1078, USA; Comprehensive Cancer Center, University of Michigan, Ann Arbor, MI 48109, USA
| | - Cristiane H Squarize
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109-1078, USA; Comprehensive Cancer Center, University of Michigan, Ann Arbor, MI 48109, USA.
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Webber LP, Wagner VP, Curra M, Vargas PA, Meurer L, Carrard VC, Squarize CH, Castilho RM, Martins MD. Hypoacetylation of acetyl-histone H3 (H3K9ac) as marker of poor prognosis in oral cancer. Histopathology 2017; 71:278-286. [DOI: 10.1111/his.13218] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Accepted: 03/18/2017] [Indexed: 12/19/2022]
Affiliation(s)
- Liana P Webber
- Experimental Pathology Unit; Hospital de Clínicas de Porto Alegre; Porto Alegre RS Brazil
- Department of Oral Pathology; School of Dentistry; Universidade Federal do Rio Grande do Sul; Porto Alegre RS Brazil
- Laboratory of Epithelial Biology; Department of Periodontics and Oral Medicine; University of Michigan School of Dentistry; Ann Arbor MI USA
| | - Vivian P Wagner
- Experimental Pathology Unit; Hospital de Clínicas de Porto Alegre; Porto Alegre RS Brazil
- Department of Oral Pathology; School of Dentistry; Universidade Federal do Rio Grande do Sul; Porto Alegre RS Brazil
| | - Marina Curra
- Experimental Pathology Unit; Hospital de Clínicas de Porto Alegre; Porto Alegre RS Brazil
- Department of Oral Pathology; School of Dentistry; Universidade Federal do Rio Grande do Sul; Porto Alegre RS Brazil
| | - Pablo A Vargas
- Department of Oral Diagnosis; Piracicaba Dental School; State University of Campinas; Piracicaba SP Brazil
| | - Luise Meurer
- Experimental Pathology Unit; Hospital de Clínicas de Porto Alegre; Porto Alegre RS Brazil
- Department of Pathology; School of Medicine; Universidade Federal do Rio Grande do Sul; Porto Alegre Rio Grande do Sul Brazil
| | - Vinícius C Carrard
- Department of Oral Pathology; School of Dentistry; Universidade Federal do Rio Grande do Sul; Porto Alegre RS Brazil
| | - Cristiane H Squarize
- Laboratory of Epithelial Biology; Department of Periodontics and Oral Medicine; University of Michigan School of Dentistry; Ann Arbor MI USA
| | - Rogério M Castilho
- Laboratory of Epithelial Biology; Department of Periodontics and Oral Medicine; University of Michigan School of Dentistry; Ann Arbor MI USA
| | - Manoela D Martins
- Experimental Pathology Unit; Hospital de Clínicas de Porto Alegre; Porto Alegre RS Brazil
- Department of Oral Pathology; School of Dentistry; Universidade Federal do Rio Grande do Sul; Porto Alegre RS Brazil
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Matsumoto CS, Almeida LO, Guimarães DM, Martins MD, Papagerakis P, Papagerakis S, Leopoldino AM, Castilho RM, Squarize CH. PI3K-PTEN dysregulation leads to mTOR-driven upregulation of the core clock gene BMAL1 in normal and malignant epithelial cells. Oncotarget 2016; 7:42393-42407. [PMID: 27285754 PMCID: PMC5173143 DOI: 10.18632/oncotarget.9877] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Accepted: 05/19/2016] [Indexed: 01/23/2023] Open
Abstract
Dysfunctional clock signaling is observed in a variety of pathological conditions. Many members of the clock gene family are upregulated in tumor cells. Here, we explored the consequences of a commonly disrupted signaling pathway in head and neck cancer on the regulation of circadian clock genes. PTEN is a key molecular controller of the PI3K signaling, and loss of PTEN function is often observed in a variety of cancers. Our main goal was to determine whether PTEN regulates circadian clock signaling. We found that oxidation-driven loss of PTEN function resulted in the activation of mTOR signaling and activation of the core clock protein BMAL1 (also known as ARNTL). The PTEN-induced BMAL1 upregulation was further confirmed using small interference RNA targeting PTEN, and in vivo conditional depletion of PTEN from the epidermis. We observed that PTEN-driven accumulation of BMAL1 was mTOR-mediated and that administration of Rapamycin, a specific mTOR inhibitor, resulted in in vivo rescue of normal levels of BMAL1. Accumulation of BMAL1 by deletion of PER2, a Period family gene, was also rescued upon in vivo administration of mTOR inhibitor. Notably, BMAL1 regulation requires mTOR regulatory protein Raptor and Rictor. These findings indicate that mTORC1 and mTORC2 complex plays a critical role in controlling BMAL1, establishing a connection between PI3K signaling and the regulation of circadian rhythm, ultimately resulting in deregulated BMAL1 in tumor cells with disrupted PI3K signaling.
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Affiliation(s)
- Camila S. Matsumoto
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
- Department of Clinical Analysis, Toxicology and Bromatology, School of Pharmacy, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - Luciana O. Almeida
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - Douglas M. Guimarães
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
- Department of Oral Pathology, School of Dentistry, University of Sao Paulo, SP, Brazil
| | - Manoela D. Martins
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
- Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Petros Papagerakis
- Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
- Center for Organogenesis, University of Michigan, Ann Arbor, MI, USA
| | - Silvana Papagerakis
- Comprehensive Cancer Center, University of Michigan, Ann Arbor, MI, USA
- Department of Otolaryngology, Medical School, University of Michigan, Ann Arbor, MI, USA
| | - Andreia M. Leopoldino
- Department of Clinical Analysis, Toxicology and Bromatology, School of Pharmacy, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - Rogerio M. Castilho
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - Cristiane H. Squarize
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
- Comprehensive Cancer Center, University of Michigan, Ann Arbor, MI, USA
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31
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Martins MD, Jiao Y, Larsson L, Almeida LO, Garaicoa-Pazmino C, Le JM, Squarize CH, Inohara N, Giannobile WV, Castilho RM. Epigenetic Modifications of Histones in Periodontal Disease. J Dent Res 2015; 95:215-22. [PMID: 26496800 DOI: 10.1177/0022034515611876] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Periodontitis is a chronic infectious disease driven by dysbiosis, an imbalance between commensal bacteria and the host organism. Periodontitis is a leading cause of tooth loss in adults and occurs in about 50% of the US population. In addition to the clinical challenges associated with treating periodontitis, the progression and chronic nature of this disease seriously affect human health. Emerging evidence suggests that periodontitis is associated with mechanisms beyond bacteria-induced protein and tissue degradation. Here, we hypothesize that bacteria are able to induce epigenetic modifications in oral epithelial cells mediated by histone modifications. In this study, we found that dysbiosis in vivo led to epigenetic modifications, including acetylation of histones and downregulation of DNA methyltransferase 1. In addition, in vitro exposure of oral epithelial cells to lipopolysaccharides resulted in histone modifications, activation of transcriptional coactivators, such as p300/CBP, and accumulation of nuclear factor-κB (NF-κB). Given that oral epithelial cells are the first line of defense for the periodontium against bacteria, we also evaluated whether activation of pathogen recognition receptors induced histone modifications. We found that activation of the Toll-like receptors 1, 2, and 4 and the nucleotide-binding oligomerization domain protein 1 induced histone acetylation in oral epithelial cells. Our findings corroborate the emerging concept that epigenetic modifications play a role in the development of periodontitis.
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Affiliation(s)
- M D Martins
- Laboratory of Epithelial Biology, University of Michigan School of Dentistry, Ann Arbor, MI, USA Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - Y Jiao
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA Department of Pathology and Comprehensive Cancer Center, The University of Michigan Medical School, Ann Arbor, MI, USA
| | - L Larsson
- Department of Periodontology, Institute of Odontology, University of Gothenburg, Sweden
| | - L O Almeida
- Laboratory of Epithelial Biology, University of Michigan School of Dentistry, Ann Arbor, MI, USA Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - C Garaicoa-Pazmino
- Laboratory of Epithelial Biology, University of Michigan School of Dentistry, Ann Arbor, MI, USA Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - J M Le
- Laboratory of Epithelial Biology, University of Michigan School of Dentistry, Ann Arbor, MI, USA Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - C H Squarize
- Laboratory of Epithelial Biology, University of Michigan School of Dentistry, Ann Arbor, MI, USA Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - N Inohara
- Department of Pathology and Comprehensive Cancer Center, The University of Michigan Medical School, Ann Arbor, MI, USA
| | - W V Giannobile
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - R M Castilho
- Laboratory of Epithelial Biology, University of Michigan School of Dentistry, Ann Arbor, MI, USA Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
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Abstract
The human papillomavirus (HPV) is an etiologic agent associated with the development of head and neck squamous carcinoma (HNSCC)-in particular, oropharyngeal squamous cell carcinoma. The HPV-positive HNSCC is characterized by genetic alterations, clinical progression, and therapeutic response, which are distinct from HPV-negative head and neck cancers, suggesting that virus-associated tumors constitute a unique entity among head and neck cancers. Malignant stem cells, or cancer stem cells, are a subpopulation of tumor cells that self-renew, initiate new tumors upon transplantation, and are resistant to therapy, and their discovery has revealed novel effects of oncovirus infection in cancer. In this review, we provide a virus-centric view and novel insights into HPV-positive head and neck pathogenesis. We discuss the influence of cancer stem cells, HPV oncoproteins, altered molecular pathways, and mutations in cancer initiation and cancer progression. We compiled a catalogue of the mutations associated with HPV-positive HNSCC, which may be a useful resource for genomic-based studies aiming to develop personalized therapies. We also explain recent changes in mass vaccination campaigns against HPV and the potential long-term impact of vaccinations on the prevention and treatment of HPV-positive head and neck cancers.
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Affiliation(s)
- A N Pullos
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - R M Castilho
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - C H Squarize
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA University of Michigan Comprehensive Cancer Center, Ann Arbor, MI, USA
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Dillenburg CS, Martins MAT, Almeida LO, Meurer L, Squarize CH, Martins MD, Castilho RM. Epigenetic Modifications and Accumulation of DNA Double-Strand Breaks in Oral Lichen Planus Lesions Presenting Poor Response to Therapy. Medicine (Baltimore) 2015; 94:e997. [PMID: 26222871 PMCID: PMC4554108 DOI: 10.1097/md.0000000000000997] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Epigenetics refers to changes in cell characteristics that occur independently of modifications to the deoxyribonucleic acid (DNA) sequence. Alterations mediated by epigenetic mechanisms are important factors in cancer progression. Although an exciting prospect, the identification of early epigenetic markers associated with clinical outcome in premalignant and malignant disorders remains elusive. We examined alterations in chromatin acetylation in oral lichen planus (OLP) with distinct clinical behavior and compared the alterations to the levels of DNA double-strand breaks (DSBs). We analyzed 42 OLP patients, who had different responses to therapy, for acetyl-histone H3 at lys9 (H3K9ac), which is associated with enhanced transcription and nuclear decondensation, and the presence of DSBs, as determined by accumulation of phosphorylated γH2AX foci. Patients with high levels of H3K9ac acetylation failed to respond to therapy or experienced disease recurrence shortly after therapy. Similar to H3K9ac, patients who responded poorly to therapy had increased accumulation of DNA DSB, indicating genomic instability. These findings suggest that histone modifications occur in OLP, and H3K9ac and γH2AX histones may serve as epigenetic markers for OLP recurrence.
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Affiliation(s)
- Caroline S Dillenburg
- From the Department of Oral Pathology (CSD, MDM), School of Dentistry; Department of Oral Medicine (MATM), Hospital de Clínicas de Porto Alegre (HCPA/UFRGS); Department of Pathology (LM), School of Medicine, Hospital de Clínicas de Porto Alegre (HCPA/UFRGS), Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil; and Laboratory of Epithelial Biology (CSD, MATM, LOA, CHS, MDM, RMC), Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
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34
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Wu Y, Zhang C, Squarize CH, Zou D. Oral Rehabilitation of Adult Edentulous Siblings Severely Lacking Alveolar Bone Due to Ectodermal Dysplasia: A Report of 2 Clinical Cases and a Literature Review. J Oral Maxillofac Surg 2015; 73:1733.e1-12. [PMID: 25957874 DOI: 10.1016/j.joms.2015.03.065] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Revised: 03/18/2015] [Accepted: 03/31/2015] [Indexed: 10/23/2022]
Abstract
The oral conditions of adult edentulous patients with ectodermal dysplasia (ED) often lead to decreased physical and psychological health, and the negative effects can become as extreme as social and psychological isolation. However, restoring oral function of adult edentulous patients with ED using zygomatic implants (ZIs) or conventional implants (CIs) remains challenging for dentists because of the severe atrophy of these patients' alveolar ridges. This report describes 2 cases of adult edentulous siblings with ED; they exhibited severe alveolar bone atrophy and were treated with ZIs and CIs as bases to augment the bone in their anterior jaws. For these patients, bone augmentation was completed with an autogenous fibular graft. Although there was mild evidence of bone graft resorption in the maxilla, the bone augmentation procedures were successful in the 2 patients. Effective osseointegration of the implants was obtained. After placement, the functional and esthetic results of the oral rehabilitation were acceptable. More importantly, restoration of the patients' oral function enhanced their self-confidence and self-esteem. Therefore, restoring oral function in adult patients with ED and edentulous jaws using ZIs and CIs as the bases for bone augmentation is an effective approach.
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Affiliation(s)
- Yiqun Wu
- Professor, Department of Oral Implant, School of Medicine, Ninth People's Hospital Affiliated with Shanghai Jiao Tong University, Shanghai, China.
| | - Chenping Zhang
- Professor, Department of Oral and Maxillofacial Surgery, School of Medicine, Ninth People's Hospital Affiliated with Shanghai Jiao Tong University, Shanghai, China
| | - Cristiane H Squarize
- Assistant Professor, Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI
| | - Duohong Zou
- Associate Professor, Department of Dental Implant Center, Stomatological Hospital and College, Anhui Medical University, Key Laboratory of Oral Diseases Research of Anhui Province, Hefei, China.
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35
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Zagni C, Guimarães DM, Salerno L, Punzo F, Squarize CH, Mineo PG, Romeo G, Rescifina A. An α1-adrenergic receptor ligand repurposed as a potent antiproliferative agent for head and neck squamous cell carcinoma. RSC Adv 2015. [DOI: 10.1039/c4ra11856a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
In this study we report the anticancer properties of RN5-Me, an α1-adrenergic receptor ligand.
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Affiliation(s)
- Chiara Zagni
- Dipartimento di Scienze del Farmaco
- Università di Catania
- 95125 Catania
- Italy
- Laboratory of Epithelial Biology
| | - Douglas Magno Guimarães
- Laboratory of Epithelial Biology
- Department of Periodontics and Oral Medicine
- University of Michigan
- Ann Arbor
- USA
| | - Loredana Salerno
- Dipartimento di Scienze del Farmaco
- Università di Catania
- 95125 Catania
- Italy
| | - Francesco Punzo
- Dipartimento di Scienze del Farmaco
- Università di Catania
- 95125 Catania
- Italy
| | - Cristiane H. Squarize
- Laboratory of Epithelial Biology
- Department of Periodontics and Oral Medicine
- University of Michigan
- Ann Arbor
- USA
| | - Placido Giuseppe Mineo
- CNR-IPCF Istituto per i Processi Chimico Fisici
- 98158 Messina
- Italy
- Dipartimento di Scienze Chimiche and I.N.S.T.M. UdR of Catania
- Università di Catania
| | - Giuseppe Romeo
- Dipartimento di Scienze del Farmaco
- Università di Catania
- 95125 Catania
- Italy
| | - Antonio Rescifina
- Dipartimento di Scienze del Farmaco
- Università di Catania
- 95125 Catania
- Italy
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36
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Le JM, Squarize CH, Castilho RM. Histone modifications: Targeting head and neck cancer stem cells. World J Stem Cells 2014; 6:511-525. [PMID: 25426249 PMCID: PMC4178252 DOI: 10.4252/wjsc.v6.i5.511] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2014] [Revised: 09/10/2014] [Accepted: 09/17/2014] [Indexed: 02/06/2023] Open
Abstract
Head and neck squamous cell carcinoma (HNSCC) is the sixth most common cancer worldwide, and is responsible for a quarter of a million deaths annually. The survival rate for HNSCC patients is poor, showing only minor improvement in the last three decades. Despite new surgical techniques and chemotherapy protocols, tumor resistance to chemotherapy remains a significant challenge for HNSCC patients. Numerous mechanisms underlie chemoresistance, including genetic and epigenetic alterations in cancer cells that may be acquired during treatment and activation of mitogenic signaling pathways, such as nuclear factor kappa-light-chain-enhancer-of activated B cell, that cause reduced apoptosis. In addition to dysfunctional molecular signaling, emerging evidence reveals involvement of cancer stem cells (CSCs) in tumor development and in tumor resistance to chemotherapy and radiotherapy. These observations have sparked interest in understanding the mechanisms involved in the control of CSC function and fate. Post-translational modifications of histones dynamically influence gene expression independent of alterations to the DNA sequence. Recent findings from our group have shown that pharmacological induction of post-translational modifications of tumor histones dynamically modulates CSC plasticity. These findings suggest that a better understanding of the biology of CSCs in response to epigenetic switches and pharmacological inhibitors of histone function may directly translate to the development of a mechanism-based strategy to disrupt CSCs. In this review, we present and discuss current knowledge on epigenetic modifications of HNSCC and CSC response to DNA methylation and histone modifications. In addition, we discuss chromatin modifications and their role in tumor resistance to therapy.
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Pellicioli ACA, Martins MD, Dillenburg CS, Marques MM, Squarize CH, Castilho RM. Laser phototherapy accelerates oral keratinocyte migration through the modulation of the mammalian target of rapamycin signaling pathway. J Biomed Opt 2014; 19:028002. [PMID: 24531144 DOI: 10.1117/1.jbo.19.2.028002] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2013] [Accepted: 01/17/2014] [Indexed: 06/03/2023]
Abstract
Keratinocytes play a central role in wound healing by responding to tissue injury through the activation of cellular proliferation and migration. Current clinical evidence suggests that the laser phototherapy (LPT) accelerates wound healing in a variety of oral diseases; however, the molecular mechanisms involved in response to LPT are not fully understood. Oral keratinocytes (NOK-SI) maintained under nutritional-deficit culture medium (2% fetal bovine serum) were irradiated with InGaAlP laser (660 nm; 40 mW; 0.04 cm2 spot size) in punctual and contact modes. The energy densities used were 4 and 20 J/cm2 corresponding to 4 and 20 s of exposure times and 0.16 and 0.8 J of energy per point, respectively. Three sessions of irradiations were applied with 6-h intervals. Further, the impact of LPT over cellular migration, proliferation, and activation of the mammalian target of rapamycin (mTOR) pathway, known to play a major role in epithelial migration and wound healing, was analyzed. Compared with control cells, the LPT-treated cells showed accelerated cellular migration without any changes in proliferation. Furthermore, LPT resulted in an increase in the phospho-S6 ribosomal protein, indicating activation of the mTOR signaling pathway. Collectively, these findings suggest that the LPT activates mTOR signaling pathway, promotes epithelial cell migration, and accelerates healing of oral mucosa.
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Affiliation(s)
- Ana Carolina Amorim Pellicioli
- Universidade Federal do Rio Grande do Sul, School of Dentistry, Department of Oral Pathology, Porto Alegre, Rio Grande do Sul 90035-003, Brazil
| | - Manoela Domingues Martins
- Universidade Federal do Rio Grande do Sul, School of Dentistry, Department of Oral Pathology, Porto Alegre, Rio Grande do Sul 90035-003, Brazil
| | - Caroline Siviero Dillenburg
- Universidade Federal do Rio Grande do Sul, School of Dentistry, Department of Oral Pathology, Porto Alegre, Rio Grande do Sul 90035-003, Brazil
| | - Márcia Martins Marques
- University of São Paulo, School of Dentistry, Department of Dentistry, São Paulo, São Paulo 05508-000, Brazil
| | - Cristiane H Squarize
- University of Michigan, School of Dentistry, Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, Ann Arbor, Michigan 48109-1078
| | - Rogerio M Castilho
- University of Michigan, School of Dentistry, Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, Ann Arbor, Michigan 48109-1078
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38
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Almeida LO, Abrahao AC, Rosselli-Murai LK, Giudice FS, Zagni C, Leopoldino AM, Squarize CH, Castilho RM. NFκB mediates cisplatin resistance through histone modifications in head and neck squamous cell carcinoma (HNSCC). FEBS Open Bio 2013; 4:96-104. [PMID: 24490130 PMCID: PMC3907686 DOI: 10.1016/j.fob.2013.12.003] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Revised: 12/13/2013] [Accepted: 12/22/2013] [Indexed: 12/20/2022] Open
Abstract
Cisplatin-based chemotherapy is the standard treatment of choice for head and neck squamous cell carcinoma (HNSCC). The efficiency of platinum-based therapies is directly influenced by the development of tumor resistance. Multiple signaling pathways have been linked to tumor resistance, including activation of nuclear factor kappa B (NFκB). We explore a novel mechanism by which NFκB drives HNSCC resistance through histone modifications. Post-translational modification of histones alters chromatin structure, facilitating the binding of nuclear factors that mediate DNA repair, transcription, and other processes. We found that chemoresistant HNSCC cells with active NFκB signaling respond to chemotherapy by reducing nuclear BRCA1 levels and by promoting histone deacetylation (chromatin compaction). Activation of this molecular signature resulted in impaired DNA damage repair, prolonged accumulation of histone γH2AX and increased genomic instability. We found that pharmacological induction of histone acetylation using HDAC inhibitors prevented NFκB-induced cisplatin resistance. Furthermore, silencing NFκB in HNSCC induced acetylation of tumor histones, resulting in reduced chemoresistance and increased cytotoxicity following cisplatin treatment. Collectively, these findings suggest that epigenetic modifications of HNSCC resulting from NFκB-induced histone modifications constitute a novel molecular mechanism responsible for chemoresistance in HNSCC. Therefore, targeted inhibition of HDAC may be used as a viable therapeutic strategy for disrupting tumor resistance caused by NFκB. Chemoresistant HNSCC cells have deacetylation of histones and active NFκB signaling. Histone deacetylation reduces BRCA1 levels and enhances genomic instability. Histone deacetylase (HDAC) inhibitors sensitize HNSCC to chemotherapy. NFκB signaling drives HNSCC chemoresistance by inducing histone deacetylation. NFκB inhibition results in histone acetylation and sensitizes HNSCC to chemotherapy.
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Key Words
- BRCA1, breast cancer type 1
- BSA, bovine serum albumin
- Chemoresistance
- Chromatin remodeling
- DDR, DNA damage repair
- DMSO, dimethyl sulfoxide
- DSB, double strand breaks
- HDAC inhibitor
- HDAC, histone deacetylases
- HNSCC
- HNSCC, head and neck squamous cell carcinoma
- Histone acetylation
- IC50, half maximal inhibitory concentration
- IKKα, IκB kinase alpha
- IKKβ, IκB kinase beta
- MTS, non-radioactive cell proliferation assay
- NFκB
- NFκB, nuclear factor kappa B
- NIH, National Institutes of Health
- TSA, trichostatin A
- siRNA, small interfering RNA
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Affiliation(s)
- Luciana O Almeida
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA ; Department of Clinical Analysis, Toxicology and Bromatology, School of Pharmacy, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - Aline C Abrahao
- Department of Pathology and Oral Diagnosis, Federal University of Rio de Janeiro School of Dentistry, Rio de Janeiro, RJ, Brazil
| | - Luciana K Rosselli-Murai
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - Fernanda S Giudice
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - Chiara Zagni
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - Andreia M Leopoldino
- Department of Clinical Analysis, Toxicology and Bromatology, School of Pharmacy, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - Cristiane H Squarize
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - Rogerio M Castilho
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
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39
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Rosselli-Murai LK, Almeida LO, Zagni C, Galindo-Moreno P, Padial-Molina M, Volk SL, Murai MJ, Rios HF, Squarize CH, Castilho RM. Periostin responds to mechanical stress and tension by activating the MTOR signaling pathway. PLoS One 2013; 8:e83580. [PMID: 24349533 PMCID: PMC3862800 DOI: 10.1371/journal.pone.0083580] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2013] [Accepted: 11/06/2013] [Indexed: 11/28/2022] Open
Abstract
Current knowledge about Periostin biology has expanded from its recognized functions in embryogenesis and bone metabolism to its roles in tissue repair and remodeling and its clinical implications in cancer. Emerging evidence suggests that Periostin plays a critical role in the mechanism of wound healing; however, the paracrine effect of Periostin in epithelial cell biology is still poorly understood. We found that epithelial cells are capable of producing endogenous Periostin that, unlike mesenchymal cell, cannot be secreted. Epithelial cells responded to Periostin paracrine stimuli by enhancing cellular migration and proliferation and by activating the mTOR signaling pathway. Interestingly, biomechanical stimulation of epithelial cells, which simulates tension forces that occur during initial steps of tissue healing, induced Periostin production and mTOR activation. The molecular association of Periostin and mTOR signaling was further dissected by administering rapamycin, a selective pharmacological inhibitor of mTOR, and by disruption of Raptor and Rictor scaffold proteins implicated in the regulation of mTORC1 and mTORC2 complex assembly. Both strategies resulted in ablation of Periostin-induced mitogenic and migratory activity. These results indicate that Periostin-induced epithelial migration and proliferation requires mTOR signaling. Collectively, our findings identify Periostin as a mechanical stress responsive molecule that is primarily secreted by fibroblasts during wound healing and expressed endogenously in epithelial cells resulting in the control of cellular physiology through a mechanism mediated by the mTOR signaling cascade.
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Affiliation(s)
- Luciana K. Rosselli-Murai
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Luciana O. Almeida
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Chiara Zagni
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Pablo Galindo-Moreno
- Department of Oral Surgery and Implant Dentistry, School of Dentistry, University of Granada, Granada, Spain
| | - Miguel Padial-Molina
- Department of Oral Surgery and Implant Dentistry, School of Dentistry, University of Granada, Granada, Spain
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Sarah L. Volk
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Marcelo J. Murai
- The Division of Hematology and Oncology, University of Michigan Comprehensive Cancer Center, Ann Arbor, Michigan, United States of America
| | - Hector F. Rios
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Cristiane H. Squarize
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Rogerio M. Castilho
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, Michigan, United States of America
- * E-mail:
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Sales KU, Giudice FS, Castilho RM, Salles FT, Squarize CH, Abrahao AC, Pinto DS. Cyclin D1-induced proliferation is independent of beta-catenin in head and neck cancer. Oral Dis 2013; 20:e42-8. [PMID: 23730900 DOI: 10.1111/odi.12124] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2012] [Revised: 04/04/2013] [Accepted: 04/18/2013] [Indexed: 11/28/2022]
Abstract
OBJECTIVE Head and neck squamous cell carcinoma (HNSCC) progression and metastasis have previously been associated with the activation of phosphatidylinositol 3-kinase-protein kinase B (PI3K-Akt) and Wnt signalling pathways, which lead to the activation of pro-proliferative genes, such as cyclin D1. The current study aims to investigate whether there is a crosstalk between these pathways in HNSCC and which pathway is more likely to regulate cyclin D1. MATERIAL AND METHODS Two HNSCC and a control keratinocyte cell lines were treated with EGF and wortmannin to respectively activate and block the PI3K-Akt and Wnt pathways. Partial and total levels of cyclin D1, beta-catenin and Akt were evaluated by Western blotting and immunofluorescence. Twenty-four paraffin-embedded samples of human HNSCC, as well as normal oral mucosa biopsies, were also immunohistochemically evaluated for beta-catenin and cyclin D1 expression. RESULTS Following both treatments, change in cyclin D1 protein was correlated with Akt levels only. Cytoplasmic staining for beta-catenin and loss of its membranous expression in the HNSCC invasive areas were found in 92% of the HNSCC biopsies. CONCLUSION Taken together, we show that the change in cyclin D1 levels is more likely to be due to the EGFR-Akt pathway activation than due to beta-catenin nuclear translocation.
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Affiliation(s)
- K U Sales
- Department of Oral Pathology, University of São Paulo School of Dentistry, São Paulo, Brazil
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Giudice FS, Pinto DS, Nör JE, Squarize CH, Castilho RM. Inhibition of histone deacetylase impacts cancer stem cells and induces epithelial-mesenchyme transition of head and neck cancer. PLoS One 2013; 8:e58672. [PMID: 23527004 PMCID: PMC3603970 DOI: 10.1371/journal.pone.0058672] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2012] [Accepted: 02/05/2013] [Indexed: 12/30/2022] Open
Abstract
The genome is organized and packed into the nucleus through interactions with core histone proteins. Emerging evidence suggests that tumors are highly responsive to epigenetic alterations that induce chromatin-based events and dynamically influence tumor behavior. We examined chromatin organization in head and neck squamous cell carcinoma (HNSCC) using acetylation levels of histone 3 as a marker of chromatin compaction. Compared to control oral keratinocytes, we found that HNSCC cells are hypoacetylated and that microenvironmental cues (e.g., microvasculature endothelial cells) induce tumor acetylation. Furthermore, we found that chemical inhibition of histone deacetylases (HDAC) reduces the number of cancer stem cells (CSC) and inhibits clonogenic sphere formation. Paradoxically, inhibition of HDAC also induced epithelial-mesenchymal transition (EMT) in HNSCC cells, accumulation of BMI-1, an oncogene associated with tumor aggressiveness, and expression of the vimentin mesenchymal marker. Importantly, we observed co-expression of vimentin and acetylated histone 3 at the invasion front of human HNSCC tumor tissues. Collectively, these findings suggest that environmental cues, such as endothelial cell-secreted factors, modulate tumor plasticity by limiting the population of CSC and inducing EMT. Therefore, inhibition of HDAC may constitute a novel strategy to disrupt the population of CSC in head and neck tumors to create a homogeneous population of cancer cells with biologically defined signatures and predictable behavior.
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Affiliation(s)
- Fernanda S. Giudice
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, Michigan, United States of America
- Department of Oral Pathology, School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - Decio S. Pinto
- Department of Oral Pathology, School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - Jacques E. Nör
- Department of Cariology, Restorative Sciences and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Cristiane H. Squarize
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, Michigan, United States of America
| | - Rogerio M. Castilho
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, Michigan, United States of America
- * E-mail:
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Castilho RM, Squarize CH, Gutkind JS. Exploiting PI3K/mTOR signaling to accelerate epithelial wound healing. Oral Dis 2013; 19:551-8. [PMID: 23379329 DOI: 10.1111/odi.12070] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Revised: 12/28/2012] [Accepted: 12/29/2012] [Indexed: 11/29/2022]
Abstract
The molecular circuitries controlling the process of skin wound healing have gained new significant insights in recent years. This knowledge is built on landmark studies on skin embryogenesis, maturation, and differentiation. Furthermore, the identification, characterization, and elucidation of the biological roles of adult skin epithelial stem cells and their influence in tissue homeostasis have provided the foundation for the overall understanding of the process of skin wound healing and tissue repair. Among numerous signaling pathways associated with epithelial functions, the PI3K/Akt/mTOR signaling route has gained substantial attention with the generation of animal models capable of dissecting individual components of the pathway, thereby providing a novel insight into the molecular framework underlying skin homeostasis and tissue regeneration. In this review, we focus on recent findings regarding the mechanisms involved in wound healing associated with the upregulation of the activity of the PI3K/Akt/mTOR circuitry. This review highlights critical findings on the molecular mechanisms controlling the activation of mTOR, a downstream component of the PI3K-PTEN pathway, which is directly involved in epithelial migration and proliferation. We discuss how this emerging information can be exploited for the development of novel pharmacological intervention strategies to accelerate the healing of critical size wounds.
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Affiliation(s)
- R M Castilho
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109-1078, USA.
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Abstract
Studies attempting to identify and understand the function of mutated genes and deregulated molecular pathways in cancer have been ongoing for many years. The PI3K-PTEN-mTOR signaling pathway is one of the most frequently deregulated pathways in cancer. PIK3CA mutations are found 11%-33% of head and neck cancer (HNC). The hotspot mutation sites for PIK3CA are E542K, E545K and H1047R/L. The PTEN somatic mutations are in 9-23% of HNC, and they frequently cluster in the phosphatase domain of PTEN protein. PTEN loss of heterozygosity (LOH) ranges from 41%-71% and loss of PTEN protein expression occurs in 31.2% of the HNC samples. PIK3CA and PTEN are key molecules in the PI3K-PTEN-mTOR signaling pathway. In this review, we provided a comprehensive overview of mutations in the PI3K-PTEN-mTOR molecular circuitry in HNC, including PI3K family members, TSC1/TSC2, PTEN, AKT, and mTORC1 and mTORC2 complexes. We discussed how these genetic alterations may affect protein structure and function. We also highlight the latest discoveries in protein kinase and tumor suppressor families, emphasizing how mutations in these families interfere with PI3K signaling. A better understanding of the mechanisms underlying cancer formation, progression and resistance to therapy will inform selection of novel genomic-based personalized therapies for head and neck cancer patients.
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Affiliation(s)
- Fernanda S Giudice
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, Michigan, 48109-1078, USA ; International Research Center, A. C. Camargo Cancer Center, São Paulo, SP, Brazil
| | - Cristiane H Squarize
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, Michigan, 48109-1078, USA
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Leopoldino AM, Squarize CH, Garcia CB, Almeida LO, Pestana CR, Sobral LM, Uyemura SA, Tajara EH, Silvio Gutkind J, Curti C. SET protein accumulates in HNSCC and contributes to cell survival: antioxidant defense, Akt phosphorylation and AVOs acidification. Oral Oncol 2012; 48:1106-13. [PMID: 22739068 DOI: 10.1016/j.oraloncology.2012.05.014] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2012] [Revised: 04/27/2012] [Accepted: 05/09/2012] [Indexed: 12/27/2022]
Abstract
OBJECTIVES Determination of the SET protein levels in head and neck squamous cell carcinoma (HNSCC) tissue samples and the SET role in cell survival and response to oxidative stress in HNSCC cell lineages. MATERIALS AND METHODS SET protein was analyzed in 372 HNSCC tissue samples by immunohistochemistry using tissue microarray and HNSCC cell lineages. Oxidative stress was induced with the pro-oxidant tert-butylhydroperoxide (50 and 250μM) in the HNSCC HN13 cell lineage either with (siSET) or without (siNC) SET knockdown. Cell viability was evaluated by trypan blue exclusion and annexin V/propidium iodide assays. It was assessed caspase-3 and -9, PARP-1, DNA fragmentation, NM23-H1, SET, Akt and phosphorylated Akt (p-Akt) status. Acidic vesicular organelles (AVOs) were assessed by the acridine orange assay. Glutathione levels and transcripts of antioxidant genes were assayed by fluorometry and real time PCR, respectively. RESULTS SET levels were up-regulated in 97% tumor tissue samples and in HNSCC cell lineages. SiSET in HN13 cells (i) promoted cell death but did not induced caspases, PARP-1 cleavage or DNA fragmentation, and (ii) decreased resistance to death induced by oxidative stress, indicating SET involvement through caspase-independent mechanism. The red fluorescence induced by siSET in HN13 cells in the acridine orange assay suggests SET-dependent prevention of AVOs acidification. NM23-H1 protein was restricted to the cytoplasm of siSET/siNC HN13 cells under oxidative stress, in association with decrease of cleaved SET levels. In the presence of oxidative stress, siNC HN13 cells showed lower GSH antioxidant defense (GSH/GSSG ratio) but higher expression of the antioxidant genes PRDX6, SOD2 and TXN compared to siSET HN13 cells. Still under oxidative stress, p-Akt levels were increased in siNC HN13 cells but not in siSET HN13, indicating its involvement in HN13 cell survival. Similar results for the main SET effects were observed in HN12 and CAL 27 cell lineages, except that HN13 cells were more resistant to death. CONCLUSION SET is potential (i) marker for HNSCC associated with cancer cell resistance and (ii) new target in cancer therapy.
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Affiliation(s)
- Andréia M Leopoldino
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av. Café, s/n, 14040-930 Ribeirão Preto, SP, Brazil.
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Leopoldino AM, Squarize CH, Garcia CB, Almeida LO, Pestana CR, Polizello ACM, Uyemura SA, Tajara EH, Gutkind JS, Curti C. Accumulation of the SET protein in HEK293T cells and mild oxidative stress: cell survival or death signaling. Mol Cell Biochem 2011; 363:65-74. [PMID: 22143534 DOI: 10.1007/s11010-011-1158-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2011] [Accepted: 11/23/2011] [Indexed: 01/03/2023]
Abstract
SET protein (I2PP2A) is an inhibitor of PP2A, which regulates the phosphorylated Akt (protein kinase B) levels. We assessed the effects of SET overexpression in HEK293T cells, both in the presence and the absence of mild oxidative stress induced by 50 μM tert-butyl hydroperoxide. Immunoblotting assays demonstrated that SET accumulated in HEK293T cells and increased the levels of phosphorylated Akt and PTEN; in addition, SET decreased glutathione antioxidant defense of cell and increased expression of genes encoding antioxidant defense proteins. Immunofluorescence analysis demonstrated that accumulated SET was equally distributed in cytoplasm and nucleus; however, in cells that had been exposed to oxidative stress, SET was found in large aggregates in the cytoplasm. SET accumulation in HEK293T cells correlated with inhibition of basal apoptosis as evidenced by a decrease in annexin V staining and activity of caspases; under mild oxidative stress, SET accumulation correlated with caspase-independent cell death, as evidenced by increased PI and annexin V/PI double staining. The results suggest that accumulated SET could act via Akt/PTEN either as cell survival signal or as oxidative stress sensor for cell death.
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Affiliation(s)
- Andréia M Leopoldino
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil.
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Abrahao AC, Castilho RM, Squarize CH, Molinolo AA, dos Santos-Pinto D, Gutkind JS. A role for COX2-derived PGE2 and PGE2-receptor subtypes in head and neck squamous carcinoma cell proliferation. Oral Oncol 2010; 46:880-7. [PMID: 20951077 DOI: 10.1016/j.oraloncology.2010.09.005] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2010] [Revised: 09/03/2010] [Accepted: 09/06/2010] [Indexed: 10/18/2022]
Abstract
The overexpression of cyclooxygenase (COX)-2 is a frequent event in squamous cell carcinomas of the head and neck (HNSCC), and non-steroidal anti-inflammatory drugs, which are potent inhibitors of COX-1 and COX-2, exert chemopreventive effects on HNSCC cancer development. COX-2 promotes the release of the pro-inflammatory mediator prostaglandin E2 (PGE2), which acts on its cell surface G protein-coupled receptors EP1, EP2, EP3, and EP4. Here, we investigated the role of PGE2 and its receptors in cellular proliferation in HNSCC. The expression of COX-2 and EP1-4 was examined in immortalized oral epithelial cells and in a representative panel of HNSCC cell lines, and based on these data EP1-EP3 and COX-2 expression were evaluated by immunohistochemistry in a large clinical sample collection using HNSCC tissue microarrays. The ability of selective COX-2 inhibition to block PGE2 secretion was measured by ELISA specific assays. The effects of PGE2 on cell proliferation were evaluated using PGE2, its stable analog, and EP2 and EP3-specific synthetic agonists. The results presented here show that HNSCC tumoral lesions and their derived cell lines constitutively express COX-2 and the EP1, EP2 and EP3 receptors for PGE2. HNSCC cells secrete PGE2, which can be suppressed by low concentrations of COX-2 selective inhibitors, without inhibiting cell proliferation. Exogenously added stable PGE2 and EP3-specific agonists induce DNA synthesis in all HNSCC cell lines tested. Overall, our study supports the emerging notion that PGE2 produced in the tumor microenvironment by the overexpression of COX-2 in tumoral and inflammatory cells may promote the growth of HNSCC cells in an autocrine and paracrine fashion by acting on PGE2 receptors that are widely expressed in most HNSCC cancer cells. In particular, our findings suggest that EP3 receptor may play a more prominent role in HNSCC cell growth promotion, thus providing a rationale for the future evaluation of this PGE2 receptor as a target for HNSCC prevention strategies.
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Affiliation(s)
- Aline Correa Abrahao
- Department of Oral Pathology, Dental School, University of São Paulo, Avenida Lineu Prestes, 2227, São Paulo, SP 05509-000, Brazil
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Squarize CH, Castilho RM, Bugge TH, Gutkind JS. Accelerated wound healing by mTOR activation in genetically defined mouse models. PLoS One 2010; 5:e10643. [PMID: 20498714 PMCID: PMC2869363 DOI: 10.1371/journal.pone.0010643] [Citation(s) in RCA: 142] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2010] [Accepted: 04/08/2010] [Indexed: 12/11/2022] Open
Abstract
Background The management of slow or non-healing ulcerations constitutes an increasing clinical challenge in the developed world because of the ageing of the population and the pandemic rise in type II diabetes. Recent studies suggest that molecular circuitries deployed by tumor cells to promote cancerous growth may also contribute to tissue regeneration. Here, we exploited this emerging information to search for novel molecular targets to accelerate wound healing. Methodology/Principal Findings We found that the activation of the PI3K-Akt-mTOR pathway, whose aberrant function is a frequent event in human neoplasia, represents an integral component of the normal wound healing process. By the use of genetically defined approaches, including the epithelial-specific ablation of Pten and Tsc1, we show that mTOR activation can dramatically increase epithelial cell proliferation, migration, and cutaneous wound healing, while pharmacological inhibition of mTOR with rapamycin delays wound closure. Conclusions/Significance Overall, our findings indicate that the transient pharmacologic activation of the PI3K-Akt-mTOR signaling axis may represent a novel clinical intervention strategy to accelerate the healing of debilitating and life-threatening wounds.
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Affiliation(s)
- Cristiane H. Squarize
- Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland, United States of America
- Division of Oral Pathology/Medicine/Radiology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, Michigan, United States of America
| | - Rogerio M. Castilho
- Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland, United States of America
- Division of Oral Pathology/Medicine/Radiology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, Michigan, United States of America
| | - Thomas H. Bugge
- Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland, United States of America
| | - J. Silvio Gutkind
- Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland, United States of America
- * E-mail:
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Castilho RM, Squarize CH, Leelahavanichkul K, Zheng Y, Bugge T, Gutkind JS. Rac1 is required for epithelial stem cell function during dermal and oral mucosal wound healing but not for tissue homeostasis in mice. PLoS One 2010; 5:e10503. [PMID: 20463891 PMCID: PMC2865533 DOI: 10.1371/journal.pone.0010503] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2010] [Accepted: 04/07/2010] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND The regenerative capacity of the skin, including the continuous replacement of exfoliated cells and healing of injuries relies on the epidermal stem cells and their immediate cell descendants. The relative contribution of the hair follicle stem cells and the interfollicular stem cells to dermal wound healing is an area of active investigation. Recent studies have revealed that the small GTPase Rac1, which regulates cell migration and nuclear gene expression, is required for hair follicle stem function but not for the normal homeostasis of the interfollicular skin. METHODOLOGY/PRINCIPAL FINDINGS Here we explored whether Rac1 contributes to wound healing in the skin and in the oral mucosa, the latter an anatomical site that presents similar architecture to that of the skin but is devoid of any hair follicle structures, and hence lacks hair follicle stem cells. Epidermal Rac1 gene excision led to the clearly delayed closure of cutaneous wounds. Remarkably, genetic ablation of Rac1 from the oral mucosa resulted in the complete inability of oral wounds to heal. We present evidence that the lack of oral mucosal re-epithelization may result from the reduced migratory capacity of cells lacking Rac1 together with altered expression of injury-induced proliferative and cellular stress-related expression programs. CONCLUSIONS/SIGNIFICANCE Together, these observations support that while the normal development and homeostasis of the interfollicular skin and oral mucosa do not require Rac1 function, the interfollicular and oral epithelial stem cells may require a Rac1-dependent program to orchestrate the tissue response to injury and ultimate for wound closure. Ultimately, these findings may enable the molecular characterization of the acute tissue regenerative response of these stem cell populations, thus facilitating the identification of novel molecular-targeted strategies aimed at accelerating wound closure.
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Affiliation(s)
- Rogerio M. Castilho
- Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland, United States of America
- Department of Periodontics and Oral Medicine, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Cristiane H. Squarize
- Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland, United States of America
- Department of Periodontics and Oral Medicine, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Kantima Leelahavanichkul
- Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Yi Zheng
- Division of Experimental Hematology, Children's Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio, United States of America
| | - Thomas Bugge
- Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland, United States of America
| | - J. Silvio Gutkind
- Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland, United States of America
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Castilho RM, Squarize CH, Chodosh LA, Williams BO, Gutkind JS. mTOR mediates Wnt-induced epidermal stem cell exhaustion and aging. Cell Stem Cell 2009; 5:279-89. [PMID: 19733540 DOI: 10.1016/j.stem.2009.06.017] [Citation(s) in RCA: 300] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2008] [Revised: 05/20/2009] [Accepted: 06/16/2009] [Indexed: 12/17/2022]
Abstract
Epidermal integrity is a complex process established during embryogenesis and maintained throughout the organism lifespan by epithelial stem cells. Although Wnt regulates normal epithelial stem cell renewal, aberrant Wnt signaling can contribute to cancerous growth. Here, we explored the consequences of persistent expressing Wnt1 in an epidermal compartment that includes the epithelial stem cells. Surprisingly, Wnt caused the rapid growth of the hair follicles, but this was followed by epithelial cell senescence, disappearance of the epidermal stem cell compartment, and progressive hair loss. Although Wnt1 induced the activation of beta-catenin and the mTOR pathway, both hair follicle hyperproliferation and stem cell exhaustion were strictly dependent on mTOR function. These findings suggest that whereas activation of beta-catenin contributes to tumor growth, epithelial stem cells may be endowed with a protective mechanism that results in cell senescence upon the persistent stimulation of proliferative pathways that activate mTOR, ultimately suppressing tumor formation.
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Affiliation(s)
- Rogerio M Castilho
- Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD 20892, USA
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Abstract
Multiple genetic and epigenetic events, including the aberrant expression and function of molecules regulating cell signaling, growth, survival, motility, angiogenesis, and cell cycle control, underlie the progressive acquisition of a malignant phenotype in squamous carcinomas of the head and neck (HNSCC). In this regard, there has been a recent explosion in our understanding on how extracellular components, cell surface molecules, and a myriad of intracellular proteins and second messenger systems interact with each other, and are organized in pathways and networks to control cellular and tissue functions and cell fate decisions. This emerging ability to understand the basic mechanism controlling inter- and intra-cellular communication has provided an unprecedented opportunity to understand how their dysregulation contributes to the growth and dissemination of human cancers. Here, we will discuss the emerging information on how the use of modern technologies, including gene array and proteomic studies, combined with the molecular dissection of aberrant signaling networks, including the EGFR, ras, NFkappaB, Stat, Wnt/beta-catenin, TGF-beta, and PI3K-AKT-mTOR signaling pathways, can help elucidate the molecular mechanisms underlying HNSCC progression. Ultimately, we can envision that this knowledge may provide tremendous opportunities for the diagnosis of premalignant squamous lesions, and for the development of novel molecular-targeted strategies for the prevention and treatment of HNSCC.
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Affiliation(s)
- Alfredo A. Molinolo
- Oral & Pharyngeal Cancer Branch, National Institute of Craniofacial and Dental Research, National Institutes of Health, Bethesda, MD 20892
| | - Panomwat Amornphimoltham
- Oral & Pharyngeal Cancer Branch, National Institute of Craniofacial and Dental Research, National Institutes of Health, Bethesda, MD 20892
| | - Cristiane H. Squarize
- Oral & Pharyngeal Cancer Branch, National Institute of Craniofacial and Dental Research, National Institutes of Health, Bethesda, MD 20892
| | - Rogerio M. Castilho
- Oral & Pharyngeal Cancer Branch, National Institute of Craniofacial and Dental Research, National Institutes of Health, Bethesda, MD 20892
| | - Vyomesh Patel
- Oral & Pharyngeal Cancer Branch, National Institute of Craniofacial and Dental Research, National Institutes of Health, Bethesda, MD 20892
| | - J. Silvio Gutkind
- Oral & Pharyngeal Cancer Branch, National Institute of Craniofacial and Dental Research, National Institutes of Health, Bethesda, MD 20892
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