1
|
Kawaharada M, Yamazaki M, Maruyama S, AbÉ T, Chan NN, Kitano T, Kobayashi T, Maeda T, Tanuma JI. Novel cytological model for the identification of early oral cancer diagnostic markers: The carcinoma sequence model. Oncol Lett 2022; 23:76. [PMID: 35111245 PMCID: PMC8771650 DOI: 10.3892/ol.2022.13196] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 12/29/2021] [Indexed: 02/06/2023] Open
Abstract
Most oral squamous cell carcinomas (OSCCs) arise from a premalignant lesion, oral epithelial dysplasia; however, useful markers for the early detection of OSCC are lacking. The present study aimed to establish a novel experimental model to observe changes in the sequential expression patterns of mRNAs and proteins in a rat model of tongue cancer using liquid-based cytology techniques. Cytology specimens were collected at 2, 5, 8, 11, 14, 17 and 21 weeks from rats treated with 4-nitroquinoline 1-oxide to induce tongue cancer. The expression of candidate biomarkers was examined by performing immunocytochemistry and reverse transcription-quantitative PCR. The percentage of positively stained nuclei was calculated as the labeling index (LI). All rats developed OSCC of the tongue at 21 weeks. The mRNA expression levels of bromodomain protein 4 (Brd4), c-Myc and Tp53 were upregulated during the progression from negative for intraepithelial lesion or malignancy to squamous cell carcinoma (SCC). Brd4- and c-Myc-LI increased in low-grade squamous intraepithelial lesion, high-grade squamous intraepithelial lesion and SCC specimens. p53-LI was significantly increased in SCC specimens. This novel experimental model allowed the observation of sequential morphological changes and the expression patterns of mRNAs and proteins during carcinogenesis. Combining immunocytochemistry with cytology-based diagnoses may potentially improve the diagnostic accuracy of OSCC.
Collapse
Affiliation(s)
- Masami Kawaharada
- Division of Reconstructive Surgery for Oral and Maxillofacial Region, Faculty of Dentistry and Graduate School of Medical and Dental Sciences, Niigata University, Chuo-ku, Niigata 951-8514, Japan.,Division of Oral Pathology, Faculty of Dentistry and Graduate School of Medical and Dental Sciences, Niigata University, Chuo-ku, Niigata 951-8514, Japan
| | - Manabu Yamazaki
- Division of Oral Pathology, Faculty of Dentistry and Graduate School of Medical and Dental Sciences, Niigata University, Chuo-ku, Niigata 951-8514, Japan
| | - Satoshi Maruyama
- Oral Pathology Section, Department of Surgical Pathology, Niigata University Hospital, Chuo-ku, Niigata 951-8520, Japan
| | - Tatsuya AbÉ
- Division of Oral Pathology, Faculty of Dentistry and Graduate School of Medical and Dental Sciences, Niigata University, Chuo-ku, Niigata 951-8514, Japan
| | - Nyein Nyein Chan
- Division of Reconstructive Surgery for Oral and Maxillofacial Region, Faculty of Dentistry and Graduate School of Medical and Dental Sciences, Niigata University, Chuo-ku, Niigata 951-8514, Japan.,Division of Oral Pathology, Faculty of Dentistry and Graduate School of Medical and Dental Sciences, Niigata University, Chuo-ku, Niigata 951-8514, Japan
| | - Taiichi Kitano
- Oral Pathology Section, Department of Surgical Pathology, Niigata University Hospital, Chuo-ku, Niigata 951-8520, Japan
| | - Tadaharu Kobayashi
- Division of Reconstructive Surgery for Oral and Maxillofacial Region, Faculty of Dentistry and Graduate School of Medical and Dental Sciences, Niigata University, Chuo-ku, Niigata 951-8514, Japan
| | - Takeyasu Maeda
- Research Center for Advanced Oral Science, Faculty of Dentistry and Graduate School of Medical and Dental Sciences, Niigata University, Chuo-ku, Niigata 951-8514, Japan
| | - Jun-Ichi Tanuma
- Division of Oral Pathology, Faculty of Dentistry and Graduate School of Medical and Dental Sciences, Niigata University, Chuo-ku, Niigata 951-8514, Japan
| |
Collapse
|
2
|
Nashef A, Qahaz N, El-Naaj IA, Iraqi FA. Systems genetics analysis of oral squamous cell carcinoma susceptibility using the mouse model: current position and new perspective. Mamm Genome 2021; 32:323-331. [PMID: 34155540 DOI: 10.1007/s00335-021-09885-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Accepted: 06/07/2021] [Indexed: 01/17/2023]
Abstract
Oral squamous cell carcinoma (OSCC) is one of the most common human malignancies with complex etiology and poor prognosis. Although environmental carcinogens and carcinogenic viruses are still considered the main etiologic factors for OSCC development, genetic factors obviously play a key role in the initiation and progression of this neoplasm, given that not all individuals exposed to carcinogens develop the same severity of the disease, if any. Identifying genetic loci modulating OSCC risk may have several important clinical implications, including early detection, prevention and developing new treatment strategies. Due to limitations in controlled and standardized genetic studies in humans, genetic components underlying susceptibility of OSCC development remain largely unknown. A combination of quantitative trait loci mapping in mice, with complementary association studies in humans, has the potential to discover novel cancer risk loci. As of today, a limited number of genetic analyses were applied on rodent models to locate novel genetic loci associated with human OSCC. Here, we discuss the current status of the mouse models use for dissecting the genetic basis of OSCC and highlight how systems genetics analysis using mouse models, may increase our understanding of human OSCC susceptibility.
Collapse
Affiliation(s)
- Aysar Nashef
- Department of Oral and Maxillofacial Surgery, Baruch Padeh Medical Center, Poriya, Israel
| | - Nayrouz Qahaz
- Department of Clinical Microbiology and Immunology, Sackler Faculty of Medicine, Tel-Aviv University, Ramat Aviv, 69978, Tel Aviv, Israel
| | - Imad Abu El-Naaj
- Department of Oral and Maxillofacial Surgery, Baruch Padeh Medical Center, Poriya, Israel
- Azrieli Faculty of Medicine, Bar-Ilan University, Ramat Gan, Israel
| | - Fuad A Iraqi
- Department of Clinical Microbiology and Immunology, Sackler Faculty of Medicine, Tel-Aviv University, Ramat Aviv, 69978, Tel Aviv, Israel.
| |
Collapse
|
3
|
SUWA HIROHIKO, HIRANO MASATO, KAWARADA KOUJI, NAGAYAMA MOTOHIKO, EHARA MICHIKO, MURAKI TOMONARI, SHISA HAYASE, SUGIYAMA AIKO, SUGIMOTO MASAHIRO, HIAI HIROSHI, KITANO MOTOO, TANUMA JUNICHI. Pthlh, a promising cancer modifier gene in rat tongue carcinogenesis. Oncol Rep 2014; 31:3-12. [PMID: 24253735 PMCID: PMC3868494 DOI: 10.3892/or.2013.2859] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2013] [Accepted: 10/21/2013] [Indexed: 12/02/2022] Open
Abstract
Susceptibly to the induction of rat tongue cancer (TC) by oral 4-nitroquinoline 1-oxide (4NQO) exposure is a polygenic trait. Among several quantitative trait loci identified by crosses between TC-susceptible Dark Agouti (DA) rats and TC-resistant Wistar-Furth (WF) rats, we focused on tongue cancer susceptibility locus (Tcas3) of chromosome 4. We examined tongue carcinogenesis in the reciprocal congenic strains DA.WF-Tcas3 and WF.DA-Tcas3 and in their parental strains. The Tcas3DA allele, and not the Tcas3WF allele, significantly favored tumor latency, incidence and TC number/size. In genomic DNA of TCs induced in (DA x WF) F1 rats, the resistant Tcas3WF allele was frequently and selectively lost, particularly in larger tumors. Thus, we searched the possible candidate genes in the Tcas3 region using microarray analysis of TCs in F1 rats and revealed significant upregulation of 2 cancer-related genes, parathyroid hormone-like hormone (Pthlh) and Kras2. The relevance of the WF allele of Pthlh as a cancer modifier was indicated by 3 single nucleotide polymorphisms specific to this strain. In contrast, no consistent strain-specific variations were found in Kras2. Moreover, the plasma Ca2+ level was consistently higher in DA rats when compared to the level in WF rats bearing TCs; moreover, the Pthlh-mRNA expression level was >30-fold higher in TCs when compared to this level in the normal tongue mucosa. Immunostaining experiments showed strong PTHrP protein expression in TCs of DA rats, and the signal was intensified in larger TCs. Kras2 was also upregulated in TCs, but to a lesser degree than PTHrP. Thus, Pthlh is a promising candidate modifier gene in the development and progression of rat TCs.
Collapse
Affiliation(s)
- HIROHIKO SUWA
- Department of Oral Pathology, Division of Oral Pathogenesis and Disease Control, Asahi University School of Dentistry, Mizuho, Gifu, Japan
| | - MASATO HIRANO
- Department of Oral Pathology, Division of Oral Pathogenesis and Disease Control, Asahi University School of Dentistry, Mizuho, Gifu, Japan
| | - KOUJI KAWARADA
- Department of Oral Pathology, Division of Oral Pathogenesis and Disease Control, Asahi University School of Dentistry, Mizuho, Gifu, Japan
| | - MOTOHIKO NAGAYAMA
- Department of Oral Pathology, Division of Oral Pathogenesis and Disease Control, Asahi University School of Dentistry, Mizuho, Gifu, Japan
| | - MICHIKO EHARA
- Department of Oral Pathology, Division of Oral Pathogenesis and Disease Control, Asahi University School of Dentistry, Mizuho, Gifu, Japan
| | - TOMONARI MURAKI
- Department of Oral Pathology, Division of Oral Pathogenesis and Disease Control, Asahi University School of Dentistry, Mizuho, Gifu, Japan
| | - HAYASE SHISA
- Department of Pathology, Saitama Cancer Center Research Institute, Ina, Saitama, Japan
| | - AIKO SUGIYAMA
- Malignancy Control Research Laboratory, Medical Innovation Center, Graduate School of Medicine, Kyoto University, Sakyo-Ku, Kyoto, Japan
| | - MASAHIRO SUGIMOTO
- Malignancy Control Research Laboratory, Medical Innovation Center, Graduate School of Medicine, Kyoto University, Sakyo-Ku, Kyoto, Japan
| | - HIROSHI HIAI
- Malignancy Control Research Laboratory, Medical Innovation Center, Graduate School of Medicine, Kyoto University, Sakyo-Ku, Kyoto, Japan
| | - MOTOO KITANO
- Division of Pathology, Saitama Cooperative Hospital, Kawaguchi, Saitama, Japan
| | - JUN-ICHI TANUMA
- Department of Oral Pathology, Division of Oral Pathogenesis and Disease Control, Asahi University School of Dentistry, Mizuho, Gifu, Japan
| |
Collapse
|
4
|
Ogawa K, Tanuma JI, Hirano M, Hirayama Y, Semba I, Shisa H, Kitano M. Selective loss of resistant alleles at p15INK4B and p16INK4A genes in chemically-induced rat tongue cancers. Oral Oncol 2006; 42:710-7. [PMID: 16527513 DOI: 10.1016/j.oraloncology.2005.11.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2005] [Revised: 11/21/2005] [Accepted: 11/22/2005] [Indexed: 11/18/2022]
Abstract
We previously reported that susceptibility to 4-nitroquinoline 1-oxide (4NQO)-induced tongue cancer in Dark-Agouti (DA) and Wistar/Furth (WF) rats was determined by a number of quantitative trait loci. In this article, we further scrutinized one of the quantitative trait loci at a suggestive level on rat chromosome 5. Analyzing a DNA panel of 130 (DAxWF) F2 rats treated with 4NQO showed a quantitative trait loci, containing p15INK4B and p16INK4A. To study the possible relevance of these genes in the development of tongue cancer, we examined 45 4NQO-induced tongue cancers in 100 (DAxWF) F1 rats for loss of heterozygosity. The incidence of loss of heterozygosity at p15INK4B and p16INK4A genes in large advanced tongue cancers was 37.8% and 40.0%, respectively, and the WF allele was selectively lost. Accumulation of loss of heterozygosity and methylation of the promoter regions in the tumour suppressor genes in advanced tumours suggests that they may play a role in tongue cancer progression.
Collapse
Affiliation(s)
- Kotaro Ogawa
- Department of Oral Pathology, Field of Oncology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan
| | | | | | | | | | | | | |
Collapse
|
5
|
Kanojia D, Vaidya MM. 4-nitroquinoline-1-oxide induced experimental oral carcinogenesis. Oral Oncol 2006; 42:655-67. [PMID: 16448841 DOI: 10.1016/j.oraloncology.2005.10.013] [Citation(s) in RCA: 194] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2005] [Accepted: 10/18/2005] [Indexed: 02/08/2023]
Abstract
Human oral cancer is the sixth largest group of malignancies worldwide and single largest group of malignancies in the Indian subcontinent. Seventy percent of premalignant cancers appear from premalignant lesions. Only 8-10% of these lesions finally turn into malignancy. The appearance of these premalignant lesions is one distinct feature of human oral cancer. At present there is dearth of biomarkers to identify which of these lesions will turn into malignancy. Regional lymph node metastasis and locoregional recurrence are the major factors responsible for the limited survival of patients with oral cancer. Paucity of early diagnostic and prognostic markers is one of the contributory factors for higher mortality rates. Cancer is a multistep process and because of constrain in availability of human tissues from multiple stages of oral carcinogenesis including normal tissues, animal models are being widely used, aiming for the development of diagnostic and prognostic markers. A number of chemical carcinogens like coal tar, 20 methyl cholanthrene (20MC), 9,10-dimethyl-1,2-benzanthracene (DMBA) and 4-nitroquinoline-1-oxide (4NQO) have been used in experimental oral carcinogenesis. However, 4NQO is the preferred carcinogen apart from DMBA in the development of experimental oral carcinogenesis. 4NQO is a water soluble carcinogen, which induces tumors predominantly in the oral cavity. It produces all the stages of oral carcinogenesis and several lines of evidences suggest that similar histological as well as molecular changes are observed in the human system. In the present review an attempt has been made to collate the information available on mechanisms of action of 4NQO, studies carried out for the development of biomarkers and chemopreventives agents using 4NQO animal models.
Collapse
Affiliation(s)
- Deepak Kanojia
- Biochemistry and Cell Biology, Tata Memorial Hospital, Cancer Research Institute, Advanced Centre for Treatment Research and Education in Cancer, Kharghar, Navi Mumbai, Maharashtra 410 208, India
| | | |
Collapse
|
6
|
Sioga A, Economou L, Kaklamanos EG, Antoniades V, Keramidas G, Manthos A, Antoniades K. Ultrastructural changes of the palatal mucosa following application of 4-nitroquinoline-l-oxide (4NQO) in rats subjected to major salivary gland excision. ACTA ACUST UNITED AC 2006; 101:487-98. [PMID: 16545714 DOI: 10.1016/j.tripleo.2005.05.067] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2004] [Revised: 05/04/2005] [Accepted: 05/19/2005] [Indexed: 11/18/2022]
Abstract
OBJECTIVE It has been suggested that saliva exerts a protective role against the carcinogenic effect of various substances in the oral cavity. The objective of this study was to examine the ultrastructural changes of the palatal mucosa caused by the application of 4-nitroquinoline-l-oxide (4NQO) in the presence or absence of saliva. STUDY DESIGN Wistar-Furth rats subjected and not subjected to total bilateral excision of the major salivary glands were either painted with an aqueous solution of 4NQO or with propylene glycol only (controls). Two animals of each group were humanely killed periodically. The areas of the palatal lesions were immediately sliced and processed for TEM examination. RESULTS Ultrastructurally, the progressive changes to squamous cell carcinoma were observed in the animals painted with 4NQO. In the desalivated animals group, the ultrastructural alterations appeared earlier than in the group with salivary glands. CONCLUSIONS Saliva appeared to delay but not hinder tumor induction by 4NQO.
Collapse
Affiliation(s)
- Antonia Sioga
- Department of Histology and Embryology, Faculty of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | | | | | | | | | | | | |
Collapse
|
7
|
Hirano M, Tanuma JI, Hirayama Y, Ohyama M, Semba I, Wakusawa S, Shisa H, Hiai H, Kitano M. A speed congenic rat strain bearing the tongue cancer susceptibility locus Tscc1 from Dark-Agouti rats. Cancer Lett 2006; 231:185-91. [PMID: 15876484 DOI: 10.1016/j.canlet.2005.01.043] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2004] [Revised: 01/21/2005] [Accepted: 01/31/2005] [Indexed: 11/25/2022]
Abstract
We previously reported that Dark-Agouti (DA) rats are highly susceptible to 4-nitroquinoline 1-oxide (4NQO)-induced tongue cancer (TC), whereas Wistar/Furth (WF) rats are barely susceptible. Linkage analysis of reciprocal (DAxWF)F2 rats demonstrated five quantitative trait loci, Tongue squamous cell carcinoma 1-5 (Tscc1-5) determining the size and number of the TCs. The major susceptibility locus Tscc1 is mapped on rat chromosome 19. In the present study, we used a marker-assisted speed congenic procedure to construct WF.DA-Tscc1 (WF-T1D) rats, i.e. WF rats carrying a DA-derived Tscc1 chromosomal segment, and evaluated the effect of a single Tscc1 on 4NQO-induced tongue carcinogenesis. In WF-T1D rats, the incidence, number and size of 4NQO-induced TCs were significantly higher than those in WF rats, indicating that the introgressed segment contains one of the susceptibility loci for 4NQO-induced TCs from DA rats. Detection of a single nucleotide polymorphism in NQO1, one of the Tscc1 candidate genes, enabled us to map NQO1 in the Tscc1 segment between D19Wox8 and D19Wox7 on chromosome 19. Possible relevance of NQO1 polymorphism to TC susceptibility is discussed.
Collapse
Affiliation(s)
- Masato Hirano
- Department of Oral Pathology, Field of Oncology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima 890-8544, Japan.
| | | | | | | | | | | | | | | | | |
Collapse
|
8
|
Tanuma JI, Hirano M, Hirayama Y, Semba I, Ogawa K, Shisa H, Hiai H, Kitano M. Genetic predisposition to 4NQO-induced tongue carcinogenesis in the rat. Med Princ Pract 2005; 14:297-305. [PMID: 16103694 DOI: 10.1159/000086926] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2004] [Indexed: 01/22/2023] Open
Abstract
OBJECTIVE This study aims to elucidate the genetic basis of predisposition to 4-nitroquinoline 1-oxide (4NQO)-induced tongue cancers (TCs). MATERIALS AND METHODS We have reported that inbred Dark-Agouti (DA) strain rats were highly susceptible to 4NQO-induced TCs, whereas Wistar/Furth (WF) rats were resistant to tongue squamous cell carcinomas induced by oral administration of 4NQO. Using size and number of the tumours as quantitative parameters, responsible host loci were analysed by an interval mapping of F2 intercross of DA and WF given carcinogenic regimen. Also, loss of heterozygosity (LOH) at these loci was analysed in tongue cancers in (DA x WF) F1. RESULTS We identified and mapped 5 significant quantitative trait loci (QTL), the Tongue squamous cell carcinoma 1-5 (Tscc1-5), and several other suggestive QTL that determine susceptibility to 4NQO-induced TC. Study of TCs induced in (DA x WF)F1 rats revealed a high frequency of LOH in the chromosomal regions of Tscc2, 3, and 4 and also of suggestive QTL on chromosomes 5 and 6. The fact that LOH was found only in larger TCs indicates that LOH occurred in the process of tumour progression. In most LOH, the allele of the resistant WF strain was lost, suggesting that these loci may encode tumour suppressor genes. In larger TCs, in addition to LOH, point mutations and the methylation of possible candidate genes were accumulated. CONCLUSION These observations indicate that the 4NQO-induced TC in the rat is a multifactorial disease of a polygenic trait. This model will be useful to understand the complicated genetic basis of predisposition to oral cancers.
Collapse
Affiliation(s)
- Jun-ichi Tanuma
- Department of Oral Pathology, Field of Oncology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan.
| | | | | | | | | | | | | | | |
Collapse
|
9
|
Ohyama M, Hirayama Y, Tanuma JI, Hirano M, Semba I, Shisa H, Hiai H, Sugihara K, Kitano M. Expressions of junB and c-fos are enhanced in 4-nitroquinoline 1-oxide-induced rat tongue cancers. Pathol Int 2004; 54:35-40. [PMID: 14674993 DOI: 10.1046/j.1440-1827.2003.01587.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Activator protein-1 (AP-1) is a transcription factor activated in many tumors. Using 4-nitroquinoline 1-oxide (4NQO)-induced rat tongue cancers (TC), the present study investigated the expression levels of genes that encode the components of AP-1, the jun gene family (c-jun, junB and junD) and the fos gene family (c-fos, fra-1, fra-2 and fosB). Expression levels of junB and c-fos mRNAs in TC were significantly elevated compared with those in epithelial tissue of control rat tongue, although only c-fos mRNA levels tended to be elevated in dysplastic tongue epithelium. Histologically, all 4NQO-induced rat TC were well-differentiated squamous cell carcinomas. Immunostaining for JunB and c-Fos proteins was positive in the nuclei of tumor cells of all TC. It is noteworthy that JunB was negative, but c-Fos was positive in the dysplastic tongue epithelium of the 4NQO-treated rats. Immunostaining for both proteins was negative in tongue mucosal epithelium of control rats. There were no mutations in the coding regions of either junB or c-fos in all the TC examined. These results suggest the possibility that the expressions of junB and c-fos were enhanced stepwise in 4NQO-induced carcinogenesis of rat tongue, and that the coexpression of JunB and c-Fos might play an important role in the establishment of TC.
Collapse
MESH Headings
- 4-Nitroquinoline-1-oxide/toxicity
- Animals
- Biomarkers, Tumor/analysis
- Carcinoma, Squamous Cell/chemically induced
- Carcinoma, Squamous Cell/genetics
- Carcinoma, Squamous Cell/pathology
- Cell Nucleus/chemistry
- Cell Nucleus/pathology
- Disease Models, Animal
- Gene Expression Regulation, Neoplastic
- Genes, fos/genetics
- Proto-Oncogene Proteins c-jun/genetics
- RNA, Messenger/metabolism
- RNA, Neoplasm/analysis
- Rats
- Rats, Inbred Strains
- Tongue/chemistry
- Tongue/drug effects
- Tongue/pathology
- Tongue Neoplasms/chemically induced
- Tongue Neoplasms/genetics
- Tongue Neoplasms/pathology
Collapse
Affiliation(s)
- Masanobu Ohyama
- Department of Oral Pathology, Kagoshima University Dental School, Kagoshima, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
10
|
Cook R, Lu L, Gu J, Williams RW, Smeyne RJ. Identification of a single QTL, Mptp1, for susceptibility to MPTP-induced substantia nigra pars compacta neuron loss in mice. BRAIN RESEARCH. MOLECULAR BRAIN RESEARCH 2003; 110:279-88. [PMID: 12591164 DOI: 10.1016/s0169-328x(02)00659-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The loss of substantia nigra pars compacta (SNpc) neurons seen in idiopathic Parkinson's disease is hypothesized to result from a genetic susceptibility to an unknown environmental toxin. MPTP has been used as a prototypical toxin, since exposure to this drug results in variable SNpc cell death in several vertebrate species, including man and mouse. Previously, we have shown that C57BL/6J mice are sensitive to this compound, while Swiss-Webster mice are resistant. In this study, we intercrossed these mouse strains to map quantitative trait loci (QTL) for MPTP sensitivity. Using genome wide PCR analysis, we found that a single major QTLs, Mptp1, located near the distal end of chromosome 1 between D1Mit113 and D1Mit293, accounts for the majority of the strain sensitivity to MPTP.
Collapse
Affiliation(s)
- Ruby Cook
- Department of Developmental Neurobiology, St. Jude Children's Research Hospital, 332 North Lauderdale, Memphis, TN 38105-2794, USA
| | | | | | | | | |
Collapse
|
11
|
Hirano M. Polymorphism of NQO1(C609T) in Relation to Susceptibility to Oral Squamous Cell Carcinoma. ACTA ACUST UNITED AC 2003. [DOI: 10.3353/omp.8.37] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
12
|
Tanuma JI, Hiai H, Shisa H, Hirano M, Semba I, Nagaoka S, Kitano M. Carcinogenesis modifier loci in rat tongue are subject to frequent loss of heterozygosity. Int J Cancer 2002; 102:638-42. [PMID: 12448007 DOI: 10.1002/ijc.10751] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Rats of the DA strain are highly susceptible to 4NQO-induced TCs, whereas WF rats are barely susceptible. In (DA x WF)F2 rats, 5 QTL, Tscc1-5, are responsible for most of the phenotypic variations, though they do not account for all of the phenotypic differences between WF and DA rats. Analysis of 40 tongue tumors >5 mm in diameter from (DA x WF)F1 rats for LOH at the Tscc loci revealed a high frequency of LOH in chromosomal regions where the Tscc2, -3 and -4 loci map. In most cases of LOH, the allele of the barely susceptible WF strain was lost, suggesting that these loci in the WF strain encode tumor-suppressor genes. Analysis of the same tumors for somatic mutations in oncogenes indicated frequent alteration of Ha-ras, which maps in the Tscc3 region, but rare mutation of the p15(INK4B) and p16(INK4A) genes or the p53 and Msh2 genes. Frequent LOH was also found on rat chromosomes 5 (RNO5) and 6 (RNO6). Tumors of large size accumulated LOH at multiple loci, suggesting the involvement of Tscc loci in tumor progression.
Collapse
Affiliation(s)
- Jun-ichi Tanuma
- Department of Oral Pathology, Kagoshima University Dental School, Kagoshima, Japan.
| | | | | | | | | | | | | |
Collapse
|