1
|
Amiresmaili S, Rajizadeh MA, Jafari E, Bejeshk MA, Salimi F, Moslemizadeh A, Najafipour H. Myrtenol ameliorates inflammatory, oxidative, apoptotic, and hyperplasic effects of urethane-induced atypical adenomatous hyperplasia in the rat lung. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2024:10.1007/s00210-024-03375-2. [PMID: 39177787 DOI: 10.1007/s00210-024-03375-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2024] [Accepted: 08/12/2024] [Indexed: 08/24/2024]
Abstract
Lung atypical adenomatous hyperplasia (AAH) is a forerunner of pulmonary adenocarcinoma. The drugs being utilized in the remediation of this type of hyperplasia have some adverse impacts. The present research focused on the potential anti-hyperplasia effect of myrtenol, an herbal terpenoid, on urethane-induced lung AAH in rats. Rats were injected with urethane (1.5 g/kg) thrice at 48 h intervals, and 20 weeks later, the animals were treated with 50 mg/kg myrtenol intraperitoneally once a day for 1 week. The ELISA method was used to measure inflammatory cytokines and oxidative parameters in the lung tissue and bronchoalveolar lavage fluid (BALF). The expression of NFκB and apoptotic/antiapoptotic factors (P53/Bcl-2) was evaluated by western blot and immunohistochemistry, respectively. H&E staining was performed for histopathological investigation. Histopathology confirmed the anti-hyperplasia effect of myrtenol, which was evidenced by the reduction of bronchoalveolar wall thickness and inflammation score. It also decreased hyperplasia progression by reducing Bcl-2, IL-10, p53, and Ki67. Compared with the urethane group, myrtenol normalized the activity of the oxidative stress markers malondialdehyde (MDA), total antioxidant capacity (TAC), glutathione peroxidase (GPX), and superoxide dismutase (SOD). Moreover, it showed an anti-inflammatory effect by decreasing lung and BALF IL-1β levels and NFκB expression. Myrtenol may have a promising effect on lung cancer treatment by counteracting lung hyperplasia via modulation of inflammation, oxidative stress, and apoptosis.
Collapse
Affiliation(s)
| | - Mohammad Amin Rajizadeh
- Physiology Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
| | - Elham Jafari
- Department of Pathology, Pathology and Stem Cell Research Center, Afzalipour Faculty of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Mohammad Abbas Bejeshk
- Department of Physiology, Bam University of Medical Sciences, Bam, Iran
- Endocrinology and Metabolism Research Center, Institute of Basic and Clinical Physiology Sciences, Kerman University of Medical Sciences, Kerman, Iran
| | - Fouzieh Salimi
- Department of Clinical Biochemistry, Medical Faculty, and Endocrinology and Metabolism Research Center, Kerman University of Medical Sciences, Kerman, Iran
| | - Amirhossein Moslemizadeh
- Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Hamid Najafipour
- Physiology Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran.
- Cardiovascular Research Center, Institute of Basic and Clinical Physiology Sciences, Kerman University of Medical Sciences, Kerman, Iran.
| |
Collapse
|
2
|
Smith R, Gee KN, Kalvapudi S, Pachimatla A, Swamidoss R, Vedire Y, Washington D, Reid M, Barbi J, Yendamuri S. Sex-based differences in the lung immune microenvironment are associated with an increased risk of lung cancer in women. J Thorac Cardiovasc Surg 2024:S0022-5223(24)00617-2. [PMID: 39019152 DOI: 10.1016/j.jtcvs.2024.07.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 05/31/2024] [Accepted: 07/06/2024] [Indexed: 07/19/2024]
Abstract
OBJECTIVE Lung cancer remains a major cause of mortality worldwide, necessitating further understanding of carcinogenesis and its driving factors, including those influenced by sex-dependent variables. We hypothesized that sex-specific lung immune composition may contribute to a greater risk of lung cancer in women. METHODS Data from 1056 lung cancer screenings were examined for an association between sex and lung cancer risk using time-to-event analyses. Immune profiling by flow cytometry was performed on male and female lungs of 3 independent mouse models: nontumor bearing, KRAS mutated, and urethane-exposed carcinogenic. A comparable analysis was performed on human bronchoalveolar lavage samples (n = 81) from patients with lung cancer. RESULTS Of the high-risk screening cohort examined, 60 patients (5.7%) developed lung cancer during median follow-up of 43.4 months. Multivariable stepwise modeling retained female sex (hazard ratio, 1.56; P < .01) and age (P < .01) as prognostic indicators for lung cancer development. Female lung immune profiles in patients included T-cell phenotypes consistent with exhaustion (eg, higher proportions of PD-1+ Ki67-; P = .02), an expanded pool of regulatory T-cells (P = .03), reduced effector T-cell frequencies (P = .008), and enhancements in suppressive myeloid populations (P = .02) versus male patients, and this is recapitulated in mouse studies. CONCLUSIONS Female smokers display higher risk for lung cancer. In murine models and humans, female sex is associated with robust immunosuppression within the lung. Further examination of this link will be important in developing immune-based approaches to lung cancer interception and their optimal application across the sexes.
Collapse
Affiliation(s)
- Randall Smith
- Department of Thoracic Surgery, Roswell Park Comprehensive Cancer Center, Buffalo, NY; Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY
| | - Kaylan N Gee
- Department of Thoracic Surgery, Roswell Park Comprehensive Cancer Center, Buffalo, NY; Department of Surgery, University of Tennessee Graduate School of Medicine, Knoxville, Tenn
| | - Sukumar Kalvapudi
- Department of Thoracic Surgery, Roswell Park Comprehensive Cancer Center, Buffalo, NY; Department of Surgery, University of Tennessee Graduate School of Medicine, Knoxville, Tenn
| | - Akhil Pachimatla
- Department of Thoracic Surgery, Roswell Park Comprehensive Cancer Center, Buffalo, NY
| | - Robert Swamidoss
- Department of Thoracic Surgery, Roswell Park Comprehensive Cancer Center, Buffalo, NY
| | - Yeshwanth Vedire
- Department of Thoracic Surgery, Roswell Park Comprehensive Cancer Center, Buffalo, NY
| | - Deschana Washington
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY
| | - Mary Reid
- Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo, NY
| | - Joseph Barbi
- Department of Thoracic Surgery, Roswell Park Comprehensive Cancer Center, Buffalo, NY; Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY.
| | - Sai Yendamuri
- Department of Thoracic Surgery, Roswell Park Comprehensive Cancer Center, Buffalo, NY; Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY.
| |
Collapse
|
3
|
LeBourdais R, Grifno GN, Banerji R, Regan K, Suki B, Nia HT. Mapping the strain-stiffening behavior of the lung and lung cancer at microscale resolution using the crystal ribcage. FRONTIERS IN NETWORK PHYSIOLOGY 2024; 4:1396593. [PMID: 39050550 PMCID: PMC11266057 DOI: 10.3389/fnetp.2024.1396593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Accepted: 06/10/2024] [Indexed: 07/27/2024]
Abstract
Lung diseases such as cancer substantially alter the mechanical properties of the organ with direct impact on the development, progression, diagnosis, and treatment response of diseases. Despite significant interest in the lung's material properties, measuring the stiffness of intact lungs at sub-alveolar resolution has not been possible. Recently, we developed the crystal ribcage to image functioning lungs at optical resolution while controlling physiological parameters such as air pressure. Here, we introduce a data-driven, multiscale network model that takes images of the lung at different distending pressures, acquired via the crystal ribcage, and produces corresponding absolute stiffness maps. Following validation, we report absolute stiffness maps of the functioning lung at microscale resolution in health and disease. For representative images of a healthy lung and a lung with primary cancer, we find that while the lung exhibits significant stiffness heterogeneity at the microscale, primary tumors introduce even greater heterogeneity into the lung's microenvironment. Additionally, we observe that while the healthy alveoli exhibit strain-stiffening of ∼1.75 times, the tumor's stiffness increases by a factor of six across the range of measured transpulmonary pressures. While the tumor stiffness is 1.4 times the lung stiffness at a transpulmonary pressure of three cmH2O, the tumor's mean stiffness is nearly five times greater than that of the surrounding tissue at a transpulmonary pressure of 18 cmH2O. Finally, we report that the variance in both strain and stiffness increases with transpulmonary pressure in both the healthy and cancerous lungs. Our new method allows quantitative assessment of disease-induced stiffness changes in the alveoli with implications for mechanotransduction.
Collapse
Affiliation(s)
| | | | | | | | | | - Hadi T. Nia
- Department of Biomedical Engineering, Boston University, Boston, MA, United States
| |
Collapse
|
4
|
Hauer C, Blomberg R, Sompel K, Magin CM, Tennis MA. Hydrogel-embedded precision-cut lung slices support ex vivo culture of in vivo -induced premalignant lung lesions. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.04.29.591698. [PMID: 38746166 PMCID: PMC11092434 DOI: 10.1101/2024.04.29.591698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
Lung cancer is the leading cause of global cancer death and prevention strategies are key to reducing mortality. Medical prevention may have a larger impact than treatment on mortality by targeting high-risk populations and reducing their lung cancer risk. Premalignant lesions (PMLs) that can be intercepted by prevention agents are difficult to study in humans but easily accessible in murine preclinical carcinogenesis studies. Precision-cut lung slices (PCLS) are underutilized as an ex vivo model for lung cancer studies due to limited culture time. Embedding PCLS within bioengineered hydrogels extends PCLS viability and functionality for up to six weeks. Here, we embedded PCLS generated from urethane-induced murine PMLs in cell-degradable and non-degradable hydrogels to study viability and activity of the tissues over six weeks. PMLs in hydrogel-embedded PCLS maintained viability, gene expression, and proliferation. Treatment of hydrogel-embedded PCLS containing urethane-induced PMLs with iloprost, a known lung cancer prevention agent, recapitulated in vivo gene expression and activity. These studies also showed that iloprost reduced proliferation and PML size in hydrogel-embedded PCLS, with some differences based on hydrogel formulation and suggested that hydrogel-embedded PCLS models may support long-term culture of in vivo generated PMLs to improve preclinical studies of lung cancer and prevention agents.
Collapse
|
5
|
Benedetti F, Silvestri G, Denaro F, Finesso G, Contreras-Galindo R, Munawwar A, Williams S, Davis H, Bryant J, Wang Y, Radaelli E, Rathinam CV, Gallo RC, Zella D. Mycoplasma DnaK expression increases cancer development in vivo upon DNA damage. Proc Natl Acad Sci U S A 2024; 121:e2320859121. [PMID: 38412130 PMCID: PMC10927570 DOI: 10.1073/pnas.2320859121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Accepted: 01/24/2024] [Indexed: 02/29/2024] Open
Abstract
Well-controlled repair mechanisms are involved in the maintenance of genomic stability, and their failure can precipitate DNA abnormalities and elevate tumor risk. In addition, the tumor microenvironment, enriched with factors inducing oxidative stress and affecting cell cycle checkpoints, intensifies DNA damage when repair pathways falter. Recent research has unveiled associations between certain bacteria, including Mycoplasmas, and various cancers, and the causative mechanism(s) are under active investigation. We previously showed that Mycoplasma fermentans DnaK, an HSP70 family chaperone protein, hampers the activity of proteins like PARP1 and p53, crucial for genomic integrity. Moreover, our analysis of its interactome in human cancer cell lines revealed DnaK's engagement with several components of DNA-repair machinery. Finally, in vivo experiments performed in our laboratory using a DnaK knock-in mouse model generated by our group demonstrated that DnaK exposure led to increased DNA copy number variants, indicative of genomic instability. We present here evidence that expression of DnaK is linked to increased i) incidence of tumors in vivo upon exposure to urethane, a DNA damaging agent; ii) spontaneous DNA damage ex vivo; and iii) expression of proinflammatory cytokines ex vivo, variations in reactive oxygen species levels, and increased β-galactosidase activity across tissues. Moreover, DnaK was associated with increased centromeric instability. Overall, these findings highlight the significance of Mycoplasma DnaK in the etiology of cancer and other genetic disorders providing a promising target for prevention, diagnostics, and therapeutics.
Collapse
Affiliation(s)
- Francesca Benedetti
- Institute of Human Virology and Global Virus Network Center, University of Maryland School of Medicine, Baltimore, MD21201
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD21201
| | - Giovannino Silvestri
- Institute of Human Virology and Global Virus Network Center, University of Maryland School of Medicine, Baltimore, MD21201
- Department of Medicine, University of Maryland School of Medicine, Baltimore, MD21201
| | - Frank Denaro
- Department of Biology, Morgan State University, Baltimore, MD21251
| | - Giovanni Finesso
- Comparative Pathology Core, Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA19104
| | | | - Arshi Munawwar
- Institute of Human Virology and Global Virus Network Center, University of Maryland School of Medicine, Baltimore, MD21201
| | - Sumiko Williams
- Institute of Human Virology and Global Virus Network Center, University of Maryland School of Medicine, Baltimore, MD21201
- Department of Biology, Morgan State University, Baltimore, MD21251
| | - Harry Davis
- Institute of Human Virology and Global Virus Network Center, University of Maryland School of Medicine, Baltimore, MD21201
| | - Joseph Bryant
- Institute of Human Virology and Global Virus Network Center, University of Maryland School of Medicine, Baltimore, MD21201
| | - Yin Wang
- Institute of Human Virology and Global Virus Network Center, University of Maryland School of Medicine, Baltimore, MD21201
- Department of Surgery, School of Medicine, University of Maryland School of Medicine, Baltimore, MD21201
| | - Enrico Radaelli
- Comparative Pathology Core, Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA19104
| | - Chozha V. Rathinam
- Institute of Human Virology and Global Virus Network Center, University of Maryland School of Medicine, Baltimore, MD21201
- Department of Medicine, University of Maryland School of Medicine, Baltimore, MD21201
| | - Robert C. Gallo
- Institute of Human Virology and Global Virus Network Center, University of Maryland School of Medicine, Baltimore, MD21201
- Department of Medicine, University of Maryland School of Medicine, Baltimore, MD21201
| | - Davide Zella
- Institute of Human Virology and Global Virus Network Center, University of Maryland School of Medicine, Baltimore, MD21201
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD21201
| |
Collapse
|
6
|
Wang N, Jiang Y, Li M, Wang H, Pan J, Tang Y, Xie S, Xu Y, Li X, Zhou X, Xu P, Lin W, Wang X. Protein Kinase STK24 Promotes Tumor Immune Evasion via the AKT-PD-L1 Axis. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2304342. [PMID: 38229183 DOI: 10.1002/advs.202304342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 12/27/2023] [Indexed: 01/18/2024]
Abstract
Immunotherapy targeting PD-L1 is still ineffective for a wide variety of tumors with high unpredictability. Deploying combined immunotherapy with alternative targeting is practical to overcome this therapeutic resistance. Here, the deficiency of serine-threonine kinase STK24 is observed in tumor cells causing substantial attenuation of tumor growth in murine syngeneic models, a process relying on cytotoxic CD8+ T and NK cells. Mechanistically, STK24 in tumor cells associates with and directly phosphorylates AKT at Thr21, which promotes AKT activation and subsequent PD-L1 induction. Deletion or inhibition of STK24, by contrast, blocks IFN-γ-mediated PD-L1 expression. Various murine models indicate that in vivo silencing of STK24 can significantly enhance the efficacy of the anti-PD-1 blockade strategy. Elevated STK24 levels are observed in patient specimens in multiple tumor types and inversely correlated with intratumoral infiltration of cytotoxic CD8+ T cells and with patient survival. The study collectively identifies STK24 as a critical modulator of antitumor immunity, which engages in AKT and PD-L1/PD-1 signaling and is a promising target for combined immunotherapy.
Collapse
Affiliation(s)
- Ning Wang
- Institute of Immunology and Bone Marrow Transplantation Center, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310058, China
| | - Yu Jiang
- Department of Clinical Laboratory, Second Affiliated Hospital of Zhejiang University, School of Medicine, Hangzhou, Zhejiang, 310058, China
| | - Mengjie Li
- Institute of Immunology and Bone Marrow Transplantation Center, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310058, China
| | - Haofei Wang
- Institute of Immunology and Bone Marrow Transplantation Center, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310058, China
| | - Jie Pan
- Institute of Immunology and Bone Marrow Transplantation Center, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310058, China
| | - Yang Tang
- Institute of Immunology and Bone Marrow Transplantation Center, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310058, China
| | - Shaofang Xie
- Westlake Laboratory of Life Sciences and Biomedicine, School of Life Sciences, Westlake University, Hangzhou, Zhejiang, 310024, China
| | - Yunyang Xu
- Institute of Immunology and Bone Marrow Transplantation Center, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310058, China
| | - Xu Li
- Westlake Laboratory of Life Sciences and Biomedicine, School of Life Sciences, Westlake University, Hangzhou, Zhejiang, 310024, China
| | - Xuefei Zhou
- Department of Pharmacology, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310058, China
| | - Pinglong Xu
- Life Sciences Institute, Zhejiang University, Hangzhou, Zhejiang, 310058, China
| | - Wenlong Lin
- Institute of Immunology and Bone Marrow Transplantation Center, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310058, China
| | - Xiaojian Wang
- Institute of Immunology and Bone Marrow Transplantation Center, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310058, China
| |
Collapse
|
7
|
Blomberg R, Sompel K, Hauer C, Smith AJ, Peña B, Driscoll J, Hume PS, Merrick DT, Tennis MA, Magin CM. Hydrogel-Embedded Precision-Cut Lung Slices Model Lung Cancer Premalignancy Ex Vivo. Adv Healthc Mater 2024; 13:e2302246. [PMID: 37953708 PMCID: PMC10872976 DOI: 10.1002/adhm.202302246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 10/17/2023] [Indexed: 11/14/2023]
Abstract
Lung cancer is the leading global cause of cancer-related deaths. Although smoking cessation is the best prevention, 50% of lung cancer diagnoses occur in people who have quit smoking. Research into treatment options for high-risk patients is constrained to rodent models, which are time-consuming, expensive, and require large cohorts. Embedding precision-cut lung slices (PCLS) within an engineered hydrogel and exposing this tissue to vinyl carbamate, a carcinogen from cigarette smoke, creates an in vitro model of lung cancer premalignancy. Hydrogel formulations are selected to promote early lung cancer cellular phenotypes and extend PCLS viability to six weeks. Hydrogel-embedded PCLS are exposed to vinyl carbamate, which induces adenocarcinoma in mice. Analysis of proliferation, gene expression, histology, tissue stiffness, and cellular content after six weeks reveals that vinyl carbamate induces premalignant lesions with a mixed adenoma/squamous phenotype. Putative chemoprevention agents diffuse through the hydrogel and induce tissue-level changes. The design parameters selected using murine tissue are validated with hydrogel-embedded human PCLS and results show increased proliferation and premalignant lesion gene expression patterns. This tissue-engineered model of human lung cancer premalignancy is the foundation for more sophisticated ex vivo models that enable the study of carcinogenesis and chemoprevention strategies.
Collapse
Affiliation(s)
- Rachel Blomberg
- Department of Bioengineering, University of Colorado, Denver |Anschutz, Aurora, CO, 80045, USA
| | - Kayla Sompel
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine University of Colorado, Anschutz Medical Campus, Aurora, CO, 80045, USA
| | - Caroline Hauer
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine University of Colorado, Anschutz Medical Campus, Aurora, CO, 80045, USA
| | - Alex J Smith
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine University of Colorado, Anschutz Medical Campus, Aurora, CO, 80045, USA
| | - Brisa Peña
- Department of Bioengineering, University of Colorado, Denver |Anschutz, Aurora, CO, 80045, USA
- Cardiovascular Institute & Adult Medical Genetics, University of Colorado, Anschutz Medical Campus, Aurora, CO, 80045, USA
| | - Jennifer Driscoll
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, National Jewish Health, Denver, CO, 80206, USA
| | - Patrick S Hume
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine University of Colorado, Anschutz Medical Campus, Aurora, CO, 80045, USA
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, National Jewish Health, Denver, CO, 80206, USA
| | - Daniel T Merrick
- Department of Pathology, University of Colorado, Anschutz Medical Campus, Aurora, CO, 80045, USA
| | - Meredith A Tennis
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine University of Colorado, Anschutz Medical Campus, Aurora, CO, 80045, USA
| | - Chelsea M Magin
- Department of Bioengineering, University of Colorado, Denver |Anschutz, Aurora, CO, 80045, USA
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine University of Colorado, Anschutz Medical Campus, Aurora, CO, 80045, USA
- Department of Pediatrics, University of Colorado, Anschutz Medical Campus, Aurora, CO, 80045, USA
| |
Collapse
|
8
|
Ballók B, Schranc Á, Tóth I, Somogyi P, Tolnai J, Peták F, Fodor GH. Comparison of the respiratory effects of commonly utilized general anaesthesia regimes in male Sprague-Dawley rats. Front Physiol 2023; 14:1249127. [PMID: 37791348 PMCID: PMC10544940 DOI: 10.3389/fphys.2023.1249127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 09/05/2023] [Indexed: 10/05/2023] Open
Abstract
Background: Respiratory parameters in experimental animals are often characterised under general anaesthesia. However, anaesthesia regimes may alter the functional and mechanical properties of the respiratory system. While most anaesthesia regimes have been shown to affect the respiratory system, the effects of general anaesthesia protocols commonly used in animal models on lung function have not been systematically compared. Methods: The present study comprised 40 male Sprague-Dawley rats divided into five groups (N = 8 in each) according to anaesthesia regime applied: intravenous (iv) Na-pentobarbital, intraperitoneal (ip) ketamine-xylazine, iv propofol-fentanyl, inhaled sevoflurane, and ip urethane. All drugs were administered at commonly used doses. End-expiratory lung volume (EELV), airway resistance (Raw) and tissue mechanics were measured in addition to arterial blood gas parameters during mechanical ventilation while maintaining positive end-expiratory pressure (PEEP) values of 0, 3, and 6 cm H2O. Respiratory mechanics were also measured during iv methacholine (MCh) challenges to assess bronchial responsiveness. Results: While PEEP influenced baseline respiratory mechanics, EELV and blood gas parameters (p < 0.001), no between-group differences were observed (p > 0.10). Conversely, significantly lower doses of MCh were required to achieve the same elevation in Raw under ketamine-xylazine anaesthesia compared to the other groups. Conclusion: In the most frequent rodent model of respiratory disorders, no differences in baseline respiratory mechanics or function were observed between commonly used anaesthesia regimes. Bronchial hyperresponsiveness in response to ketamine-xylazine anaesthesia should be considered when designing experiments using this regime. The findings of the present study indicate commonly used anaesthetic regimes allow fair comparison of respiratory mechanics in experimental animals undergoing any of the examined anaesthesia protocols.
Collapse
Affiliation(s)
- Bence Ballók
- Department of Medical Physics and Informatics, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
| | - Álmos Schranc
- Department of Medical Physics and Informatics, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
- Unit for Anaesthesiological Investigations, Department of Anaesthesiology, Pharmacology, Intensive Care, and Emergency Medicine, University of Geneva, Geneva, Switzerland
| | - Ibolya Tóth
- Department of Medical Physics and Informatics, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
| | - Petra Somogyi
- Department of Medical Physics and Informatics, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
- Department of Cell Biology and Molecular Medicine, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
| | - József Tolnai
- Department of Medical Physics and Informatics, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
| | - Ferenc Peták
- Department of Medical Physics and Informatics, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
| | - Gergely H. Fodor
- Department of Medical Physics and Informatics, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
| |
Collapse
|
9
|
Scortegagna M, Du Y, Bradley LM, Wang K, Molinolo A, Ruppin E, Murad R, Ronai ZA. Ubiquitin Ligases Siah1a/2 Control Alveolar Macrophage Functions to Limit Carcinogen-Induced Lung Adenocarcinoma. Cancer Res 2023; 83:2016-2033. [PMID: 37078793 PMCID: PMC10330299 DOI: 10.1158/0008-5472.can-23-0258] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Revised: 03/22/2023] [Accepted: 04/17/2023] [Indexed: 04/21/2023]
Abstract
Cellular components of the tumor microenvironment, including myeloid cells, play important roles in the progression of lung adenocarcinoma (LUAD) and its response to therapy. Here, we characterize the function of the ubiquitin ligases Siah1a/2 in regulating the differentiation and activity of alveolar macrophages (AM) and assess the implication of Siah1a/2 control of AMs for carcinogen-induced LUAD. Macrophage-specific genetic ablation of Siah1a/2 promoted accumulation of AMs with an immature phenotype and increased expression of protumorigenic and pro-inflammatory Stat3 and β-catenin gene signatures. Administration of urethane to wild-type mice promoted enrichment of immature-like AMs and lung tumor development, which was enhanced by macrophage-specific Siah1a/2 ablation. The profibrotic gene signature seen in Siah1a/2-ablated immature-like macrophages was associated with increased tumor infiltration of CD14+ myeloid cells and poorer survival of patients with LUAD. Single-cell RNA-seq confirmed the presence of a cluster of immature-like AMs expressing a profibrotic signature in lungs of patients with LUAD, a signature enhanced in smokers. These findings identify Siah1a/2 in AMs as gatekeepers of lung cancer development. SIGNIFICANCE The ubiquitin ligases Siah1a/2 control proinflammatory signaling, differentiation, and profibrotic phenotypes of alveolar macrophages to suppress lung carcinogenesis.
Collapse
Affiliation(s)
- Marzia Scortegagna
- NCI-designated Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla CA
| | - Yuanning Du
- NCI-designated Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla CA
| | - Linda M. Bradley
- NCI-designated Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla CA
| | - Kun Wang
- Cancer Data Science Laboratory, National Cancer Institute, National Institutes of Health, Bethesda, MD
| | | | - Eytan Ruppin
- Cancer Data Science Laboratory, National Cancer Institute, National Institutes of Health, Bethesda, MD
| | - Rabi Murad
- NCI-designated Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla CA
| | - Ze’ev A. Ronai
- NCI-designated Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla CA
| |
Collapse
|
10
|
Sahyon HA, El-Shafai NM, Elnajjar N, Althobaiti F, Aldhahrani A, Alharbi NS, Shoair AGF, El-Mehasseb IM. Avocado peel extract loaded on chitosan nanoparticles alleviates urethane toxicity that causes lung cancer in a mouse model. Int J Biol Macromol 2023; 234:123633. [PMID: 36791938 DOI: 10.1016/j.ijbiomac.2023.123633] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Revised: 01/31/2023] [Accepted: 02/06/2023] [Indexed: 02/17/2023]
Abstract
Lung cancer progresses without obvious symptoms and is detected in most patients at late stages, causing a high rate of mortality. Avocado peels (AVP) were thought to be biowaste, but they have antioxidant and anticancer properties in vitro. Chitosan nanoparticles (Cs-NPs) were loaded with various plant extracts, increasing their in vitro and in vivo anticancer activities. Our goal was to load AVP onto Cs-NPs and determine the role of AVP-extract or AVP-loaded Cs-NPs in controlling the progression of lung cancer caused by urethane toxicity. The AVP-loaded chitosan nano-combination (Cs@AVP NC) was synthesized and characterized. Our in vitro results show that Cs@AVP NC has higher anticancer activity than AVP against three human cancer cell lines. The in vivo study proved the activation of apoptosis in lung cancer cells with the Cs@AVP NC oral treatment more than the AVP treatment. Additionally, Cs@AVP NC-treated animals showed significantly higher p53 and Bax-expression levels and lower NF-κB p65 levels in their lung tissues than in positive control animals. In conclusion, our study demonstrated the superior anticancer potency of Cs@AVP NC over AVP extract and its ability to inhibit lung cancer proliferation. Therefore, oral consumption of Cs@AVP NC might be a promising treatment for lung cancer.
Collapse
Affiliation(s)
- Heba A Sahyon
- Chemistry Department, Faculty of Science, Kafrelsheikh University, 33516 Kafrelsheikh, Egypt.
| | - Nagi M El-Shafai
- Nanotechnology Center, Chemistry Department, Faculty of Science, Kafrelsheikh University, 33516, Egypt
| | - Noha Elnajjar
- Forensic Medicine and Clinical Toxicology Department, Faculty of Medicine, Benha University, Egypt.
| | - Fayez Althobaiti
- Department of Biotechnology, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia.
| | - Adil Aldhahrani
- Clinical Laboratory Science Department, Turabah University College, Taif University, Taif 21995, Saudi Arabia.
| | - Nadaa S Alharbi
- Royal College of Surgeons in Ireland, Dublin, Ireland; Ministry of Health, Saudi Arabia.
| | - Abdel Ghany F Shoair
- Department of Science and Technology, University College - Ranyah, Taif University, Saudi Arabia; High Altitude Research Center, Prince Sultan Medical Complex, Taif University, Al-Hawiyah, Taif, Saudi Arabia.
| | - Ibrahim M El-Mehasseb
- Nanotechnology Center, Chemistry Department, Faculty of Science, Kafrelsheikh University, 33516, Egypt
| |
Collapse
|
11
|
Blomberg R, Sompel K, Hauer C, Pe A B, Driscoll J, Hume PS, Merrick DT, Tennis MA, Magin CM. Tissue-engineered models of lung cancer premalignancy. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.03.15.532835. [PMID: 36993773 PMCID: PMC10055140 DOI: 10.1101/2023.03.15.532835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Lung cancer is the leading global cause of cancer-related deaths. Although smoking cessation is the best preventive action, nearly 50% of all lung cancer diagnoses occur in people who have already quit smoking. Research into treatment options for these high-risk patients has been constrained to rodent models of chemical carcinogenesis, which are time-consuming, expensive, and require large numbers of animals. Here we show that embedding precision-cut lung slices within an engineered hydrogel and exposing this tissue to a carcinogen from cigarette smoke creates an in vitro model of lung cancer premalignancy. Hydrogel formulations were selected to promote early lung cancer cellular phenotypes and extend PCLS viability up to six weeks. In this study, hydrogel-embedded lung slices were exposed to the cigarette smoke derived carcinogen vinyl carbamate, which induces adenocarcinoma in mice. At six weeks, analysis of proliferation, gene expression, histology, tissue stiffness, and cellular content revealed that vinyl carbamate induced the formation of premalignant lesions with a mixed adenoma/squamous phenotype. Two putative chemoprevention agents were able to freely diffuse through the hydrogel and induce tissue-level changes. The design parameters selected using murine tissue were validated with hydrogel-embedded human PCLS and results showed increased proliferation and premalignant lesion gene expression patterns. This tissue-engineered model of human lung cancer premalignancy is the starting point for more sophisticated ex vivo models and a foundation for the study of carcinogenesis and chemoprevention strategies.
Collapse
|
12
|
Sun E, Meng X, Kang Z, Gu H, Li M, Tan X, Feng L, Jia X. Zengshengping improves lung cancer by regulating the intestinal barrier and intestinal microbiota. Front Pharmacol 2023; 14:1123819. [PMID: 36992837 PMCID: PMC10040556 DOI: 10.3389/fphar.2023.1123819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 02/24/2023] [Indexed: 03/16/2023] Open
Abstract
Lung cancer is a common malignant tumor in clinical practice, and its morbidity and mortality are in the forefront of malignant tumors. Radiotherapy, chemotherapy, and surgical treatment play an important role in the treatment of lung cancer, however, radiotherapy has many complications and even causes partial loss of function, the recurrence rate after surgical resection is high, and the toxic and side effects of chemotherapy drugs are strong. Traditional Chinese medicine has played a huge role in the prognosis and improvement of lung cancer, among them, Zengshengping (ZSP) has the effect of preventing and treating lung cancer. Based on the “gut-lung axis” and from the perspective of “treating the lung from the intestine”, the purpose of this study was to research the effect of Zengshengping on the intestinal physical, biological, and immune barriers, and explore its role in the prevention and treatment of lung cancer. The Lewis lung cancer and urethane-induced lung cancer models were established in C57BL/6 mice. The tumor, spleen, and thymus were weighed, and the inhibition rate, splenic and thymus indexes analyzed. Inflammatory factors and immunological indexes were detected by enzyme-linked immunosorbent assay. Collecting lung and colon tissues, hematoxylin and eosin staining was performed on lung, colon tissues to observe histopathological damage. Immunohistochemistry and Western blotting were carried out to detect tight junction protein expression in colon tissues and expression of Ki67 and p53 proteins in tumor tissues. Finally, the feces of mice were collected to investigate the changes in intestinal microbiota using 16SrDNA high-throughput sequencing technology. ZSP significantly reduced tumor weight and increased the splenic and thymus indexes. It decreased expression of Ki67 protein and increased expression of p53 protein. Compared with Model group, ZSP group reduced the serum levels of interleukin (IL)-1β, IL-6, tumor necrosis factor α (TNF-α), and ZSP group increased the concentration of secretory immunoglobulin A (sIgA) in the colon and the bronchoalveolar lavage fluid (BALF). ZSPH significantly increased the level of tight junction proteins such as ZO-1, Occludin and Claudin-1. Model group significantly reduced the relative abundance of Akkermansia (p < 0.05) and significantly promoted the amount of norank_f_Muribaculaceae, norank_f_Lachnospiraceae (p < 0.05) compared with that in the Normal group. However, ZSP groups increased in probiotic strains (Akkermansia) and decreased in pathogens (norank_f_Muribaculaceae, norank_f_Lachnospiraceae). Compared with the urethane-induced lung cancer mice, the results showed that ZSP significantly increased the diversity and richness of the intestinal microbiota in the Lewis lung cancer mice. ZSP played an important role in the prevention and treatment of lung cancer by enhancing immunity, protecting the intestinal mucosa and regulating the intestinal microbiota.
Collapse
Affiliation(s)
- E. Sun
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
- Key Laboratory of New Drug Delivery System of Chinese Meteria Medica, Jiangsu Provincial Academy of Chinese Medicine, Nanjing, China
| | - Xiangqi Meng
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
- Key Laboratory of New Drug Delivery System of Chinese Meteria Medica, Jiangsu Provincial Academy of Chinese Medicine, Nanjing, China
| | - Zhaoxia Kang
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
- Key Laboratory of New Drug Delivery System of Chinese Meteria Medica, Jiangsu Provincial Academy of Chinese Medicine, Nanjing, China
| | - Huimin Gu
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Mingyu Li
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Xiaobin Tan
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
- Key Laboratory of New Drug Delivery System of Chinese Meteria Medica, Jiangsu Provincial Academy of Chinese Medicine, Nanjing, China
| | - Liang Feng
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
- *Correspondence: Liang Feng, ; Xiaobin Jia,
| | - Xiaobin Jia
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
- *Correspondence: Liang Feng, ; Xiaobin Jia,
| |
Collapse
|
13
|
Zhou Y, Xia J, Xu S, She T, Zhang Y, Sun Y, Wen M, Jiang T, Xiong Y, Lei J. Experimental mouse models for translational human cancer research. Front Immunol 2023; 14:1095388. [PMID: 36969176 PMCID: PMC10036357 DOI: 10.3389/fimmu.2023.1095388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Accepted: 02/20/2023] [Indexed: 03/12/2023] Open
Abstract
The development and growth of tumors remains an important and ongoing threat to human life around the world. While advanced therapeutic strategies such as immune checkpoint therapy and CAR-T have achieved astonishing progress in the treatment of both solid and hematological malignancies, the malignant initiation and progression of cancer remains a controversial issue, and further research is urgently required. The experimental animal model not only has great advantages in simulating the occurrence, development, and malignant transformation mechanisms of tumors, but also can be used to evaluate the therapeutic effects of a diverse array of clinical interventions, gradually becoming an indispensable method for cancer research. In this paper, we have reviewed recent research progress in relation to mouse and rat models, focusing on spontaneous, induced, transgenic, and transplantable tumor models, to help guide the future study of malignant mechanisms and tumor prevention.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | - Tao Jiang
- *Correspondence: Jie Lei, ; Yanlu Xiong, ; Tao Jiang,
| | - Yanlu Xiong
- *Correspondence: Jie Lei, ; Yanlu Xiong, ; Tao Jiang,
| | - Jie Lei
- *Correspondence: Jie Lei, ; Yanlu Xiong, ; Tao Jiang,
| |
Collapse
|
14
|
Ibrahim MA, Mohamed SR, Dkhil MA, Thagfan FA, Abdel-Gaber R, Soliman D. The effect of Moringa oleifera leaf extracts against urethane-induced lung cancer in rat model. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:37280-37294. [PMID: 36567388 DOI: 10.1007/s11356-022-24813-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 12/13/2022] [Indexed: 06/09/2023]
Abstract
Lung cancer is one of the most common malignancies in the world, and chemotherapy can have unfavorable side effects. The aim of the present study is to evaluate the therapeutic anticancer role of Moringa oleifera leaf extracts (MLE) in urethane-induced lung cancer in adult male albino rats as compared to standard chemotherapy. Rats were categorized into four groups (10 rats/group), including negative control rats, urethane lung cancer model rats, MLE-treated lung cancer rats, and cisplatin-treated rats. Estimation of lung index, some biochemical markers of oxidative stress, quantitative real-time polymerase chain reaction (qRT-PCR), and histopathology and transmission electron microscopy were performed. The lung index was significantly increased about one-fold in urethane lung cancer model rats, but it decreased after MLE treatment. Also, MLE was able to improve the induced changes in glutathione, superoxide dismutase, and malondialdehyde concentration to be 3.8 ± 0.4 mg/g, 900.6 ± 58 U/g, and 172 ± 24 nmol/g, respectively. Additionally, after MLE treatment, the expression of EGFR-mRNA increased by about 50%. Our light and electron microscopic examination revealed that urethane group showed abnormally distributed excessive collagen fibers and the development of papillary adenocarcinoma from hyperplastic Clara cells in the lumen of terminal bronchiole with bronchiolar wall thickening, alveolar collapse, and inflammation. MLE group has moderate amount of collagen fiber and absence of tumor mass and provided more or less restoration of normal lung histology. Moreover, MLE was able to ameliorate the induced changes in mucin and PCNA positive cells in the lung by 10.8 ± 2.3%. Collectively, the current study showed that MLE could be used as anticancer agents alleviating changes associated with lung cancer in a urethane-induced lung cancer bearing rats thereby representing alternative options to toxic chemotherapy.
Collapse
Affiliation(s)
- Mona A Ibrahim
- Zoology and Entomology Department, Faculty of Science, Helwan University, Cairo, Egypt.
| | - Sherif R Mohamed
- Zoology and Entomology Department, Faculty of Science, Helwan University, Cairo, Egypt
| | - Mohamed A Dkhil
- Zoology and Entomology Department, Faculty of Science, Helwan University, Cairo, Egypt
| | - Felwa A Thagfan
- Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Rewaida Abdel-Gaber
- Department of Zoology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Doaa Soliman
- Zoology and Entomology Department, Faculty of Science, Helwan University, Cairo, Egypt
| |
Collapse
|
15
|
Dwyer-Nield L, Keith RL, Tennis MA. Protocol for intranasal chemoprevention delivery in a urethane mouse lung cancer model. STAR Protoc 2022; 3:101750. [PMID: 36201319 PMCID: PMC9535317 DOI: 10.1016/j.xpro.2022.101750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 08/29/2022] [Accepted: 09/13/2022] [Indexed: 01/26/2023] Open
Abstract
Mouse iloprost lung cancer chemoprevention studies typically use oral delivery. Here, we present a protocol for intranasal iloprost delivery within a urethane lung adenocarcinoma mouse model. We detail steps for intraperitoneal urethane injection in mice, followed by nine-week monitoring, intranasal iloprost treatment, and lungs harvesting for analysis. This iloprost delivery approach parallels an ongoing phase II clinical trial of inhaled iloprost for lung cancer chemoprevention. This protocol diversifies options for chemoprevention studies and offers a relevant and translatable model. For complete details on the use and execution of this protocol, please refer to Sompel et al. (2022).
Collapse
Affiliation(s)
- Lori Dwyer-Nield
- University of Colorado School of Pharmacy, Aurora, CO 80045, USA
| | - Robert L Keith
- Rocky Mountain Regional VA Medical Center, Aurora, CO 80045, USA; University of Colorado School of Medicine, Aurora, CO 80045, USA
| | | |
Collapse
|
16
|
Kobets T, Smith BPC, Williams GM. Food-Borne Chemical Carcinogens and the Evidence for Human Cancer Risk. Foods 2022; 11:2828. [PMID: 36140952 PMCID: PMC9497933 DOI: 10.3390/foods11182828] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 09/07/2022] [Accepted: 09/08/2022] [Indexed: 11/16/2022] Open
Abstract
Commonly consumed foods and beverages can contain chemicals with reported carcinogenic activity in rodent models. Moreover, exposures to some of these substances have been associated with increased cancer risks in humans. Food-borne carcinogens span a range of chemical classes and can arise from natural or anthropogenic sources, as well as form endogenously. Important considerations include the mechanism(s) of action (MoA), their relevance to human biology, and the level of exposure in diet. The MoAs of carcinogens have been classified as either DNA-reactive (genotoxic), involving covalent reaction with nuclear DNA, or epigenetic, involving molecular and cellular effects other than DNA reactivity. Carcinogens are generally present in food at low levels, resulting in low daily intakes, although there are some exceptions. Carcinogens of the DNA-reactive type produce effects at lower dosages than epigenetic carcinogens. Several food-related DNA-reactive carcinogens, including aflatoxins, aristolochic acid, benzene, benzo[a]pyrene and ethylene oxide, are recognized by the International Agency for Research on Cancer (IARC) as causes of human cancer. Of the epigenetic type, the only carcinogen considered to be associated with increased cancer in humans, although not from low-level food exposure, is dioxin (TCDD). Thus, DNA-reactive carcinogens in food represent a much greater risk than epigenetic carcinogens.
Collapse
Affiliation(s)
- Tetyana Kobets
- Department of Pathology, Microbiology and Immunology, New York Medical College, Valhalla, NY 10595, USA
| | - Benjamin P. C. Smith
- Future Ready Food Safety Hub, Nanyang Technological University, Singapore 639798, Singapore
| | - Gary M. Williams
- Department of Pathology, Microbiology and Immunology, New York Medical College, Valhalla, NY 10595, USA
| |
Collapse
|