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Tariq U, Butt MS, Pasha I, Faisal MN. Prophylactic role of olive fruit extract against cigarette smoke-induced oxidative stress in Sprague-Dawley rats. Cell Stress Chaperones 2022; 27:545-560. [PMID: 35951259 PMCID: PMC9485526 DOI: 10.1007/s12192-022-01291-z] [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: 05/27/2022] [Revised: 07/19/2022] [Accepted: 08/01/2022] [Indexed: 11/03/2022] Open
Abstract
Cigarette smoke exposure increases the production of free radicals leading to initiation of several pathological conditions by triggering the oxidative stress and inflammatory cascade. Olive fruit owing to its unique phytochemical composition possesses antioxidant, immune modulatory, and anti-inflammatory potential. Considering the compositional alterations in olive fruits during ripening, the current experimental trail was designed to investigate the prophylactic role of green and black olives against the oxidative stress induced by cigarette smoke exposure in rats. Purposely, rats were divided into five different groups: NC (negative control; normal diet), PC [positive control; normal diet + smoke exposure (SE)], drug (normal diet + SE + citalopram), GO (normal diet + SE + green olive extract), and BO (normal diet + SE + black olive extract). Rats of all groups were exposed to cigarette smoke except "NC" and were sacrificed for collection of blood and organs after 28 days of experimental trial. The percent reduction in total oxidative stress by citalopram and green and black olive extracts in serum was 29.72, 58.69, and 57.97%, respectively, while the total antioxidant capacity increased by 30.78, 53.94, and 43.98%, accordingly in comparison to PC. Moreover, malondialdehyde (MDA) was reduced by 29.63, 42.59, and 45.70% in drug, GO, and BO groups, respectively. Likewise, green and black olive extracts reduced the leakage of hepatic enzymes in sera, alkaline phosphatase (ALP) by 23.44 and 25.80% and 35.62 and 37.61%, alanine transaminase (ALT) by 42.68 and 24.39% and 51.04 and 35.41%, and aspartate transaminase (AST) by 31.51 and 16.07% and 40.50 and 27.09% from PC and drug group, respectively. Additionally, olive extracts also maintained the antioxidant pool, i.e., superoxide dismutase, catalase, and glutathione in serum. Furthermore, histological examination revealed that olive extracts prevented the cigarette smoke-induced necrosis, pyknotic alterations, and congestion in the lung, hepatic, and renal parenchyma. Besides, gene expression analysis revealed that olive extracts and citalopram decreased the brain and lung damage caused by stress-induced upregulation of NRF-2 and MAPK signaling pathways. Hence, it can be concluded that olives (both green and black) can act as promising antioxidant in alleviating the cigarette smoke-induced oxidative stress.
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Affiliation(s)
- Urwa Tariq
- Faculty of Food, Nutrition and Home Sciences, National Institute of Food Science and Technology, University of Agriculture, Faisalabad, Pakistan
- Department of Human Nutrition and Dietetics, Riphah International University, Faisalabad, 38000, Pakistan
| | - Masood Sadiq Butt
- Faculty of Food, Nutrition and Home Sciences, National Institute of Food Science and Technology, University of Agriculture, Faisalabad, Pakistan.
| | - Imran Pasha
- Faculty of Food, Nutrition and Home Sciences, National Institute of Food Science and Technology, University of Agriculture, Faisalabad, Pakistan
| | - Muhammad Naeem Faisal
- Institute of Pharmacy, Physiology and Pharmacology, Faculty of Veterinary Science, University of Agriculture, Faisalabad, Pakistan
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Miguel JP, Dias ADC, Bettini NR, Sousa SABAD, Durão MPL, Oliveira LVDC, Monedeiro F, Ramalho LNZ, Branco LGS, Sabino JPJ, Durand MDT. Cigarette smoke exposure causes systemic and autonomic cardiocirculatory changes in rats depending on the daily exposure dose. Life Sci 2021; 277:119498. [PMID: 33864817 DOI: 10.1016/j.lfs.2021.119498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Revised: 03/29/2021] [Accepted: 03/31/2021] [Indexed: 11/15/2022]
Abstract
AIMS To evaluate the systemic changes and autonomic cardiocirculatory control of awaken rats chronically exposed to the cigarette smoke (CS) of 1 or 2 cigarettes/day. MAIN METHODS Rats were exposed to clean air (control) or cigarette smoke of 1 (CS1) or 2 (CS2) cigarettes/animal/day for 30 days. Then, arterial pressure (AP) and heart rate (HR) were recorded in conscious rats to assess spontaneous baroreflex sensitivity and HR and AP variabilities. Evoked baroreflex and cardiac autonomic tone were evaluated by vasoactive drugs and autonomic blockers, respectively. In another group, ventilatory and cardiovascular parameters were recorded under hypoxia and hypercapnia stimulus. At the end of protocols, heart, lung, kidneys and liver were collected for histological analysis. KEY FINDINGS Rats exposed to CS showed morphological changes, being more evident in the CS2 group. Also, less weight gain and cardiac hypertrophy were prominent in CS2 rats. Basal AP and HR, spontaneous baroreflex sensitivity and cardiovascular variabilities were similar among groups. CS exposure progressively blunted the bradycardia response to phenylephrine (-2.2 ± 0.1 vs. -1.7 ± 0.2 vs. -1.5 ± 0.2) while the tachycardia response to sodium nitroprusside was slightly increased compared to control. Vagal tone was not affected by CS, but CS2 rats exhibited higher sympathetic tone (-25 ± 4 vs. -28 ± 4 vs. -56 ± 9) and lower intrinsic HR (411 ± 4 vs. 420 ± 8 vs. 390 ± 6). Exposure to CS of 2 cigarettes also exacerbated the reflex cardiovascular and ventilatory responses to hypoxia and hypercapnia. SIGNIFICANCE CS exposure for 30 days promoted systemic changes and autonomic cardiocirculatory dysfunction in rats depending on the daily exposure dose.
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Affiliation(s)
- João Paulo Miguel
- Medical School, University of Ribeirão Preto, Ribeirão Preto, SP, Brazil
| | | | | | | | | | - Lucas Vaz de Castro Oliveira
- Department of Biophysics and Physiology, Postgraduate Program in Pharmaceutical Sciences, Federal University of Piaui, Teresina, PI, Brazil
| | - Fernanda Monedeiro
- Department of Chemistry, Physiology and Basic Pathology, University of São Paulo, Ribeirão Preto, SP, Brazil
| | | | - Luiz Guilherme S Branco
- Department of Morphology, Physiology and Basic Pathology, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - João Paulo Jacob Sabino
- Department of Biophysics and Physiology, Postgraduate Program in Pharmaceutical Sciences, Federal University of Piaui, Teresina, PI, Brazil
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Easwaran M, Martinez JD, Ramirez DJ, Gall PA, Erickson-DiRenzo E. Short-term whole body cigarette smoke exposure induces regional differences in cellular response in the mouse larynx. Toxicol Rep 2021; 8:920-937. [PMID: 33996505 PMCID: PMC8099918 DOI: 10.1016/j.toxrep.2021.04.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 04/11/2021] [Accepted: 04/16/2021] [Indexed: 11/29/2022] Open
Abstract
The larynx is an essential organ in the respiratory tract and necessary for airway protection, respiration, and phonation. Cigarette smoking is a significant risk factor associated with benign and malignant laryngeal diseases. Despite this association, the underlying mechanisms by which cigarette smoke (CS) drives disease development are not well elucidated. In the current study, we developed a short-term murine whole body inhalation model to evaluate the first CS-induced cellular responses in the glottic [i.e. vocal fold (VF)] and subglottic regions of the larynx. Specifically, we investigated epithelial cell proliferation, cell death, surface topography, and mucus production, at various time points (1 day, 5 days, 10 days) after ∼ 2 h exposure to 3R4F cigarettes (Delivered dose: 5.6968 mg/kg per cigarette) and following cessation for 5 days after a 5 day CS exposure (CSE). CSE elevated levels of BrdU labeled proliferative cells and p63 labeled epithelial basal cells on day 1 in the VF. CSE increased proliferative cells in the subglottis at days 5, 10 and following cessation in the subglottis. Cleaved caspase-3 apoptotic activity was absent in VF at all time points and increased at day 1 in the subglottis. Evaluation of the VF surface by scanning electron microscopy (SEM) revealed significant epithelial microprojection damage at day 10 and early signs of necrosis at days 5 and 10 post-CSE. SEM visualizations additionally indicated the presence of deformed cilia at days 5 and 10 after CSE and post-cessation in the respiratory epithelium lined subglottis. In terms of mucin content, the impact of short-term CSE was observed only at day 10, with decreasing acidic mucin levels and increasing neutral mucin levels. Overall, these findings reveal regional differences in murine laryngeal cellular responses following short-term CSE and provide insight into potential mechanisms underlying CS-induced laryngeal disease development.
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Key Words
- AB/PAS, Alcian blue/Periodic acid Schiff
- BLOQ, below limits of quantitation
- BSA, bovine serum albumin
- BrdU, 5-bromo-2′-deoxyuridine
- CBF, ciliary beat frequency
- CC3, cleaved caspase-3
- CO, Carbon monoxide
- CS, cigarette smoke
- CSE, cigarette smoke exposure
- Cell death
- Cell proliferation
- Cigarette smoke
- DAB, 3,3′-diaminobenzidine
- FTC/ISO, Federal Trade Commission/International Standard Organization
- GSD, geometric standard deviation
- H&E, Hematoxylin and Eosin
- HIER, heat-induced antigen retrieval
- HPF, high power field
- MCC, mucociliary clearance
- MMAD, Mass median aerodynamic diameter
- Mucus production
- Murine larynx
- NMR, nicotine metabolite ratio
- OECD, organization for economic co-operation and development
- PAHs, polycyclic aromatic hydrocarbons
- RE, respiratory epithelium
- REV, reversibility
- ROS, reactive oxygen species
- SCIREQ, Scientific Respiratory Equipment Inc
- SEM, scanning electron microscopy
- SSE, stratified squamous epithelium
- SWGTOX, Scientific Working Group for Forensic Toxicology
- Surface topography
- TBST, tris-buffered saline-tween 20
- TPM, total particulate matter
- TSNA, tobacco-specific nitrosamines
- UPLC-MS/MS, ultra-performance liquid chromatography-tandem mass spectrometer
- VF, vocal fold
- VSC, veterinary service center
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Affiliation(s)
- Meena Easwaran
- Department of Otolaryngology-Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, USA
| | - Joshua D. Martinez
- Department of Otolaryngology-Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, USA
| | - Daniel J. Ramirez
- Department of Otolaryngology-Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, USA
| | - Phillip A. Gall
- Department of Otolaryngology-Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, USA
| | - Elizabeth Erickson-DiRenzo
- Department of Otolaryngology-Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, USA
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Alasmari F, Crotty Alexander LE, Drummond CA, Sari Y. A computerized exposure system for animal models to optimize nicotine delivery into the brain through inhalation of electronic cigarette vapors or cigarette smoke. Saudi Pharm J 2018; 26:622-628. [PMID: 29989025 PMCID: PMC6035328 DOI: 10.1016/j.jsps.2018.02.031] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Accepted: 02/26/2018] [Indexed: 12/25/2022] Open
Abstract
Pre-clinical studies investigated the effects of chronic exposure to nicotine on lungs, kidneys and brains using animal models. Most of these studies delivered nicotine into the circulatory and central nervous systems (CNS) through intraperitoneal injection or oral consumption methods. Few studies used inhalation machine system for nicotine delivery into brains in rodents to mimic human exposure to cigarettes. However, finding a more accurate and clinically relevant method of nicotine delivery is critical. A computerized inhalation machine has been designed (SciReq) and is currently employed in several institutions. The computerized machine delivers electronic (e)-cigarette vapor as well as tobacco smoke to rodents using marketed e-cigarette devices or tobacco cigarettes. This provides evidence about clinical effects of nicotine delivery by traditional methods (combustible cigarettes) and new methodologies (e-cigarettes) in physiological systems. Potential neurobiological mechanisms for the development of nicotine dependence have been determined recently in mice exposed to e-cigarette vapors in our laboratory using SciReq system. In this review article, the discussion focuses on the efficiency and practical applicability of using this computerized inhalation exposure system in inducing significant changes in brain protein expression and function as compared to other nicotine delivery methods. The SciReq inhalation system utilized in our laboratory and others is a method of nicotine delivery to the CNS, which has physiological relevance and mimics human inhalant exposures. Translation of the effects of inhaled nicotine on the CNS into clinical settings could provide important health considerations.
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Affiliation(s)
- Fawaz Alasmari
- Department of Pharmacology and Experimental Therapeutics, College of Pharmacy and Pharmaceutical Sciences, University of Toledo, Toledo, OH, USA
| | - Laura E Crotty Alexander
- Pulmonary and Critical Care Section, VA San Diego Healthcare System, 3350 La Jolla Village Dr, MC 111J, San Diego, CA 92161, USA.,Department of Medicine, Division of Pulmonary and Critical Care, University of California at San Diego (UCSD), La Jolla, CA 92093, USA
| | | | - Youssef Sari
- Department of Pharmacology and Experimental Therapeutics, College of Pharmacy and Pharmaceutical Sciences, University of Toledo, Toledo, OH, USA
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Nemmar A, Al-Salam S, Yuvaraju P, Beegam S, Yasin J, Ali BH. Chronic exposure to water-pipe smoke induces cardiovascular dysfunction in mice. Am J Physiol Heart Circ Physiol 2017; 312:H329-H339. [PMID: 27940964 DOI: 10.1152/ajpheart.00450.2016] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 11/29/2016] [Accepted: 12/04/2016] [Indexed: 12/21/2022]
Abstract
Water-pipe tobacco smoking is becoming prevalent in all over the world including Western countries. There are limited data on the cardiovascular effects of water-pipe smoke (WPS), in particular following chronic exposure. Here, we assessed the chronic cardiovascular effects of nose-only WPS exposure in C57BL/6 mice. The duration of the session was 30 minutes/day, 5 days/week for 6 consecutive months. Control mice were exposed to air. WPS significantly increased systolic blood pressure. The relative heart weight and plasma concentrations of troponin-I and B-type natriuretic peptide were increased in mice exposed to WPS. Arterial blood gas analysis showed that WPS caused a significant decrease in [Formula: see text] and an increase in [Formula: see text] WPS significantly shortened the thrombotic occlusion time in pial arterioles and venules and increased the number of circulating platelet. Cardiac lipid peroxidation, measured as thiobarbituric acid-reactive substances, was significantly increased, while superoxide dismutase activity, total nitric oxide activity, and glutathione concentration were reduced by WPS exposure. Likewise, immunohistochemical analysis of the heart revealed an increase in the expression of inducible nitric oxide synthase and cytochrome c by cardiomyocytes of WPS-exposed mice. Moreover, hearts of WPS-exposed mice showed the presence of focal interstitial fibrosis. WPS exposure significantly increased heart DNA damage assessed by Comet assay. We conclude that chronic nose-only exposure to WPS impairs cardiovascular homeostasis. Our findings provide evidence that long-term exposure to WPS is harmful to the cardiovascular system and supports interventions to control the spread of WPS, particularly amid youths.NEW & NOTEWORTHY No data are available on the chronic cardiovascular effects of water-pipe smoke (WPS). Our findings provide experimental evidence that chronic exposure to WPS increased blood pressure, relative heart weight, troponin I, and B-type natriuretic peptide in plasma and induced hypoxemia, hypercapnia, and thrombosis. Moreover, WPS caused cardiac oxidative stress, DNA damage, and fibrosis.
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Affiliation(s)
- Abderrahim Nemmar
- Department of Physiology, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates;
| | - Suhail Al-Salam
- Department of Pathology, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Priya Yuvaraju
- Department of Physiology, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Sumaya Beegam
- Department of Physiology, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Javed Yasin
- Department of Internal Medicine, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates; and
| | - Badreldin H Ali
- Department of Pharmacology and Clinical Pharmacy, College of Medicine and Health Sciences, Sultan Qaboos University, Al-Khod, Sultanate of Oman
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Drummond CA, Crotty Alexander LE, Haller ST, Fan X, Xie JX, Kennedy DJ, Liu J, Yan Y, Hernandez DA, Mathew DP, Cooper CJ, Shapiro JI, Tian J. Cigarette smoking causes epigenetic changes associated with cardiorenal fibrosis. Physiol Genomics 2016; 48:950-960. [PMID: 27789733 DOI: 10.1152/physiolgenomics.00070.2016] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Accepted: 10/22/2016] [Indexed: 12/14/2022] Open
Abstract
Clinical studies indicate that smoking combustible cigarettes promotes progression of renal and cardiac injury, leading to functional decline in the setting of chronic kidney disease (CKD). However, basic studies using in vivo small animal models that mimic clinical pathology of CKD are lacking. To address this issue, we evaluated renal and cardiac injury progression and functional changes induced by 4 wk of daily combustible cigarette smoke exposure in the 5/6th partial nephrectomy (PNx) CKD model. Molecular evaluations revealed that cigarette smoke significantly (P < 0.05) decreased renal and cardiac expression of the antifibrotic microRNA miR-29b-3 and increased expression of molecular fibrosis markers. In terms of cardiac and renal organ structure and function, exposure to cigarette smoke led to significantly increased systolic blood pressure, cardiac hypertrophy, cardiac and renal fibrosis, and decreased renal function. These data indicate that decreased expression of miR-29b-3p is a novel mechanism wherein cigarette smoke promotes accelerated cardiac and renal tissue injury in CKD. (155 words).
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Affiliation(s)
- Christopher A Drummond
- College of Medicine and Life Sciences, Department of Medicine, Division of Cardiovascular Medicine and Center for Hypertension and Personalized Medicine, University of Toledo, Toledo, Ohio;
| | - Laura E Crotty Alexander
- Pulmonary Critical Care Section, Veterans Affairs San Diego Healthcare System and Division of Pulmonary, Critical Care and Sleep Medicine, University of California San Diego Health Sciences, San Diego, California; and
| | - Steven T Haller
- College of Medicine and Life Sciences, Department of Medicine, Division of Cardiovascular Medicine and Center for Hypertension and Personalized Medicine, University of Toledo, Toledo, Ohio
| | - Xiaoming Fan
- College of Medicine and Life Sciences, Department of Medicine, Division of Cardiovascular Medicine and Center for Hypertension and Personalized Medicine, University of Toledo, Toledo, Ohio
| | - Jeffrey X Xie
- College of Medicine and Life Sciences, Department of Medicine, Division of Cardiovascular Medicine and Center for Hypertension and Personalized Medicine, University of Toledo, Toledo, Ohio
| | - David J Kennedy
- College of Medicine and Life Sciences, Department of Medicine, Division of Cardiovascular Medicine and Center for Hypertension and Personalized Medicine, University of Toledo, Toledo, Ohio
| | - Jiang Liu
- Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia
| | - Yanling Yan
- Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia
| | - Dawn-Alita Hernandez
- Division of Pulmonary Medicine (Critical Care and Sleep Medicine), University of Toledo, Toledo, Ohio
| | - Denzil P Mathew
- Pulmonary Critical Care Section, Veterans Affairs San Diego Healthcare System and Division of Pulmonary, Critical Care and Sleep Medicine, University of California San Diego Health Sciences, San Diego, California; and
| | - Christopher J Cooper
- College of Medicine and Life Sciences, Department of Medicine, Division of Cardiovascular Medicine and Center for Hypertension and Personalized Medicine, University of Toledo, Toledo, Ohio
| | - Joseph I Shapiro
- Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia
| | - Jiang Tian
- College of Medicine and Life Sciences, Department of Medicine, Division of Cardiovascular Medicine and Center for Hypertension and Personalized Medicine, University of Toledo, Toledo, Ohio
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Tsuji H, Fujimoto H, Lee KM, Renne R, Iwanaga A, Okubo C, Onami S, Nomura AK, Nishino T, Yoshimura H. Characterization of biochemical, functional and structural changes in mice respiratory organs chronically exposed to cigarette smoke. Inhal Toxicol 2015; 27:342-53. [DOI: 10.3109/08958378.2015.1051248] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Fujimoto H, Tsuji H, Okubo C, Fukuda I, Nishino T, Lee KM, Renne R, Yoshimura H. Biological responses in rats exposed to mainstream smoke from a heated cigarette compared to a conventional reference cigarette. Inhal Toxicol 2015; 27:224-36. [PMID: 25969858 DOI: 10.3109/08958378.2015.1027799] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The heated cigarette (HC) generates mainstream smoke by vaporizing the components of the tobacco rod using a carbon heat source at the cigarette tip. Mainstream smoke of HC contains markedly less chemical constituents compared to combusted cigarettes. Mainstream smoke from HC was generated under Health Canada Intense regimen and its biological effects were compared to those of Reference (3R4F) cigarettes, using nose-only 5-week and 13-week inhalation studies. In the 13-week study, SD rats were necropsied following exposure to mainstream smoke from each cigarette at 200, 600 or 1000 µg wet total particulate matter/L for 1 h/day, 7 days/week or following a 13-week recovery period. Histopathological changes in the respiratory tract were significantly lesser in HC groups; e.g. respiratory epithelial hyperplasia in the nasal cavity and accumulation of pigmented macrophages in alveoli. After a 13-week recovery, the lesions were completely or partially regressed, except for accumulation of pigmented macrophages in alveoli, in both HC and 3R4F groups. In the 5-week study, SD rats were necropsied following exposure to mainstream smoke of either cigarette at 600 or 1000 µg/L for 1 h, two times/day (with 30 min interval), 7 days/week or following a 4-week recovery period. Bronchoalveolar lavage fluid (BALF) analysis of neutrophil percentages and enzyme levels like γ-GT, ALP and LDH indicated that pulmonary inflammation was significantly less in HC groups compared to 3R4F groups. In conclusion, HC demonstrated significantly lower biological effects compared to 3R4F, based on the BALF parameters and histopathology.
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Affiliation(s)
- Hitoshi Fujimoto
- Product and Science Division, R&D Group, Japan Tobacco Inc. , Kanagawa , Japan
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