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Yu HC, Kripfgans OD, Rodriguez AB, Samal A, Quesada C, Webber LP, Mazzocco JP, Wang IC, Woo J, Chan HL. Ultrasonography-Derived Elasticity Estimation of Live Porcine Oral Mucosa. J Ultrasound Med 2024; 43:237-251. [PMID: 37846622 DOI: 10.1002/jum.16352] [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] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 09/25/2023] [Accepted: 09/26/2023] [Indexed: 10/18/2023]
Abstract
OBJECTIVES To investigate the biomechanical properties of porcine oral tissues with in vivo ultrasonography and to compare the difference between oral alveolar mucosa and gingival tissue concerning compressional and tensile mechanical strain. MATERIALS AND METHODS Sinclair minipigs (6 females and 4 males, 6 to 18 months of age) were anesthetized for ultrasonography. In vivo high-frequency tissue harmonic ultrasound (12/24 MHz) cine-loops were obtained while inducing mechanical tissue stress (0 to 1 N). Post-processing strain analysis was performed in a cardiac speckle tracking software (EchoInsight®). Region of interest (ROI) was placed for gingival and alveolar mucosa tissues for longitudinal (compressional) and tensile strain analyses. A calibrated gel pad was employed to determine the absolute force (pressure) for the measured tissue strain response function. The resulting elasticity data was statistically analyzed using custom Matlab scripts. RESULTS In total, 38 sonography cine-loops around the third premolars were included in the investigation. The longitudinal strain of alveolar mucosaε AM L was found to be significantly (P < .05) larger than that of gingivaε G L . Across the measured force range,ε AM L ~ 1.7 × ε G L . Significant differences between alveolar mucosa and gingiva tissues were found for all forces. The tensile strain of the alveolar mucosaε AM T was found to be ~2 × ε G T (on the epithelial surface of the gingiva). Both were statistically significantly different for forces exceeding ~0.08 N. At depth, that is, 500 and 1000 μm below the epithelial surface, the gingiva was found to have less ability to stretch contrary to the alveolar mucosa. Gingival tissue at 500 μm depth has significantly less tensile strain than at its surface and more than at 1000 μm depth. In contrast, the tensile strain of alveolar mucosa is largely independent of depth. CONCLUSION Ultrasonography can reveal significant differences in oral alveolar mucosal and gingival elastic properties, such as compressional and tensile strain. Under minute forces equivalent to 10 to 40 g, these differences can be observed. As dental ultrasound is a chairside, and noninvasive modality, obtaining real-time images might soon find clinical utility as a new diagnostic tool for the objective and quantitative assessment of periodontal and peri-implant soft tissues in clinical and research realms. As ultrasound is a safe modality with no known bioeffects, longitudinal monitoring of areas of concern would be particularly attractive.
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Affiliation(s)
- Hsi-Chien Yu
- Department of Radiology, School of Medicine, University of Michigan, Ann Arbor, MI, USA
- Department of Oral and Maxillofacial Surgery, Chi Mei Medical Center, Tainan, Taiwan
| | - Oliver D Kripfgans
- Department of Radiology, School of Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Amanda B Rodriguez
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
| | - Ankita Samal
- Department of Radiology, School of Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Carole Quesada
- Department of Radiology, School of Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Liana P Webber
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
| | - John P Mazzocco
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
| | - I-Ching Wang
- Department of Periodontics, College of Dentistry and Dental Clinics, University of Iowa, Iowa City, IA, USA
| | - Jaeman Woo
- Department of Dentistry, College of Medicine and Graduate School of Medicine, Jeju National University, Jeju, Republic of Korea
| | - Hsun-Liang Chan
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
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2
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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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3
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Danilevicz CK, Wagner VP, Ferreira N, Bock H, Salles Pilar EF, Webber LP, Schmidt TR, Alonso ECP, de Mendonça EF, Valadares MC, Marreto RN, Martins MD. Curcuma longa L. Effects on Akt/mTOR Pathway and NF-κB Expression During Skin Wound Healing: An Immunohistochemical Study. Appl Immunohistochem Mol Morphol 2021; 29:e92-e100. [PMID: 34261975 DOI: 10.1097/pai.0000000000000961] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Accepted: 06/06/2021] [Indexed: 11/25/2022]
Abstract
Skin ulcers, wounds, or burns represent a burden for health care worldwide. Our aim was to explore the effects of mucoadhesive formulation with Curcuma longa L. extract mucoadhesive formulation containing curcumin (MFC) on skin healing in Wistar rats. Fifty-four rats were randomly allocated into 3 groups: control, vehicle, and MFC. A full-thickness circular wound was induced on the back of each animal. Two daily applications of the products were performed according to the experimental group. On days 3, 10, and 21, 6 animals in each group were euthanized. Clinical analysis was based on wound area. Histologic analysis was performed in hematoxylin and eosin-stained sections, with re-epithelization and inflammation being assessed by means of semiquantitative scores. To analyze the Akt/mTOR pathway, immunohistochemistry for phospho Akt (pAkt) and phospho ribosomal protein S6 were investigated. In addition, nuclear factor kappa-light-chain-enhancer of activated B cells immunolabeling was performed. Clinical analysis revealed wounds with a smaller area on days 3 and 10 in curcumin-treated animals. Histologically, MFC had a significant impact on inflammatory events on days 3 and 10 and promoted faster re-epithelization, which was evidenced on day 10. MFC-treated wounds exhibited pAkt upregulation on day 10 and both pAkt and phospho ribosomal protein S6 downregulation on day 21. Nuclear factor kappa-light-chain-enhancer of activated B cells expression varied through the evaluation periods; however, no significant difference was observed between groups. Collectively, our results indicate that MFC is efficient in accelerating cutaneous wound repair through modulation of the inflammatory process and stimulus of re-epithelization by an Akt/mTOR-dependent mechanism.
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Affiliation(s)
- Chris K Danilevicz
- Department of Oral Pathology, School of Dentistry
- Department of Pharmacology, Institute of Basic Health Sciences
| | - Vivian P Wagner
- Department of Oral Pathology, School of Dentistry
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba
| | - Nilson Ferreira
- School of Dentistry, Federal University of Uberlândia, Uberlândia, MG
| | - Hugo Bock
- Unit of Molecular and Protein Analysis (Experimental Research Center), Clinics Hospital of Porto Alegre
| | - Emily F Salles Pilar
- Experimental Pathology Unit, Clinics Hospital of Porto Alegre, Federal University of Rio Grande do Sul, Porto Alegre, RS
| | | | | | - Ellen C P Alonso
- Laboratory of Nanosystems and Drug Delivery Devices (NanoSYS), School of Pharmacy
| | | | - Marize C Valadares
- Laboratory of Pharmacology and Cellular Toxicology, Pharmacy Faculty, Federal University of Goiás, Goiânia, GO, Brazil
| | - Ricardo N Marreto
- Laboratory of Nanosystems and Drug Delivery Devices (NanoSYS), School of Pharmacy
| | - Manoela D Martins
- Department of Oral Pathology, School of Dentistry
- Experimental Pathology Unit, Clinics Hospital of Porto Alegre, Federal University of Rio Grande do Sul, Porto Alegre, RS
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba
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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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5
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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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6
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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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7
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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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8
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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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9
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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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Webber LP, Pellicioli ACA, Magnusson AS, Danilevicz CK, Bueno CC, Sant’Ana Filho M, Rados PV, Carrard VC. Nuclear changes in oral mucosa of alcoholics and crack cocaine users. Hum Exp Toxicol 2015; 35:184-93. [DOI: 10.1177/0960327115579430] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The effects of drugs of abuse on oral mucosa are only partly understood. The aims of the present study were to: (1) evaluate the frequency of nuclear changes in normal-appearing oral mucosa of alcoholics and crack cocaine users and (2) assess their association with cell proliferation rate. Oral smears were obtained from the border of the tongue and floor of the mouth of 26 crack cocaine users (24 males and 2 females), 29 alcoholics (17 males and 12 females), and 35 controls (17 males and 18 females). Histological slides were submitted to Feulgen staining to assess the frequency of micronuclei (MN), binucleated cells (BN), broken eggs (BE), and karyorrhexis (KR). A significant increase in the frequency of MN was observed in cells exfoliated from the tongue of crack cocaine users ( p = 0.01), and alcoholics showed a higher frequency of KR in cells obtained from the floor of the mouth ( p = 0.01). Our findings suggest that the use of crack cocaine induces clastogenic effects, whereas alcoholism is associated with higher degrees of keratinization in the floor of the mouth.
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Affiliation(s)
- LP Webber
- Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - ACA Pellicioli
- Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - AS Magnusson
- Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - CK Danilevicz
- Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - CC Bueno
- Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - M Sant’Ana Filho
- Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - PV Rados
- Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - VC Carrard
- Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
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