Ming Xuan

Sichuan University, Chengdu, Sichuan Sheng, China

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Publications (13)12.38 Total impact

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    ABSTRACT: Alcohol withdrawal syndrome (AWS) is a rare complication associated with oral cancer operation. This article reported a case of AWS after resection of squamous cell cancer of the right floor of mouth combined with radical neck dissection and trapezius myocutaneous flap reconstruction. The discussion included diagnosis, treatment and prevention of AWS.
    Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology 04/2011; 29(2):223-4.
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    ABSTRACT: Mucoepidermoid carcinoma undergoes uniquely vigorous angiogenic and neovascularization processes, possibly due to proliferation of vascular endothelial cells (ECs) induced by mucoepidermoid carcinoma cells (MCCs) in their three-dimensional (3D) microenvironment. To date, no studies have dealt with tumor cells and vascular ECs from the same origin of mucoepidermoid carcinoma using the in vitro 3D microenvironment model. In this context, the current research aims to observe neovascularization with mucoepidermoid carcinoma microvascular ECs (MCMECs) conditioned by the microenvironment in the 3D collagen matrix model. We observed the growth of MCMECs purified by immunomagnetic beads and induced by MCCs, and characteristics of tubule-like structures (TLSs) formed by induced MCMECs or non-induced MCMECs. The assessment parameters involved the growth curve, the length, the outer and inner diameters, and the wall thickness of the TLSs, and the cell cycle. Results showed that MCCs induced formation of the TLSs in the 3D collagen matrix model. A statistically significant difference was noted regarding the count of TLSs between the control group and the induction group on the 4th day of culture (t=5.00, P=0.001). The outer and inner diameters (t(1)=5.549, P(1)=0.000; t(2)=10.663, P(2)=0.000) and lengths (t=18.035, P=0.000) of the TLSs in the induction group were statistically significant larger than those in the control group. The TLSs were formed at the earlier time in the induction group compared with the control group. It is concluded that MCCs promote growth and migration of MCMECs, and formation of the TLSs. The 3D collagen matrix model with MCMECs induced by MCCs in the current research may be a favorable choice for research on pro-angiogenic factors in progression of mucoepidermoid carcinoma.
    Journal of Zhejiang University SCIENCE B 10/2010; 11(10):745-53. · 1.11 Impact Factor
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    ABSTRACT: Change in expression of CD44 variant (CD44v) has been observed in several types of aggressive carcinomas. This pattern of expression might be associated with carcinogenesis of parotid pleomorphic adenoma (PPA) which is not widely studied. In this study, we aimed to investigate the expression of CD44v6 in the PPA before and after recurrence, between non-recurrent PPA, recurrent PPA, and PPA with carcinogenesis so as to identify whether the expression differences have existed before the recurrence and its significance for predicting the recurrence. Expression differences of CD44v6 were detected by immunohistochemistry in samples of non-recurrent PPA, PPA before and after the recurrence, carcinoma in pleomorphic adenoma (CPA) and normal parotid. The expression of CD44v6 was significantly higher in the group before the recurrence than that after the recurrence (p < 0.05). The expression of CD44v6 after recurrence was significantly lower than that in the non-recurrent group (p < 0.05) while the high level of CD44v6 expression in the non-recurrent group, was significantly lower than in the group with CPA (p < 0.05). However, no significant difference was observed between the group after recurrence and CPA. The decrease of CD44v6 expression promoted the recurrence and carcinogenesis of PPA, and the expression was decreased further in the process. The expression differences of CD44v6 had appeared before the recurrence.
    Expert Opinion on Investigational Drugs 04/2010; 19 Suppl 1:S101-8. · 4.74 Impact Factor
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    ABSTRACT: Expression of Id-1 (inhibitors of DNA binding/differentiation protein 1) and TSP-1 (thrombospondin-1) in mucoepidermoid carcinoma and their relationship to pathological features and prognosis was studied. Moderately and poorly differentiated groups had significantly higher Id-1 positive expression rate (p<0.05) than well differentiated carcinoma. Stages III-IV showed significant increase of Id-1 positive expression rate (p<0.05) compared with stages I and II. Id-1 positive expression was significantly higher in patients with cervical lymph node metastasis or relapse at 5 years (p<0.05). After that, patients with negative Id-1 expression had significantly higher tumor-free survival than patients with positive expression (p<0.05). Correlation between the expression of Id-1 and TSP-1 in mucoepidermoid carcinoma was negative (p<0.05). Poorly differentiated groups show significantly lower TSP-1 positive expression rate than well differentiated groups (p<0.05). No significant differences of TSP-1 positive expression were detected with clinical stage. TSP-1 positive expression was significantly lower in patients with cervical lymph node metastasis or relapse at 5 years (p<0.05). After 5 years, patients with positive TSP-1 expression had significantly higher tumor-free survival than patients with negative TSP-1. Positive Id-1 expression is associated with high malignancy/poor prognosis; positive TSP-1 expression is associated with low malignancy/good prognosis. Protein expression status may help assess tumor malignancy and patient prognosis.
    International Journal of Oral and Maxillofacial Surgery 11/2009; 39(1):29-35. · 1.52 Impact Factor
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    ABSTRACT: To study the expression and significance of basic fibroblast growth factor(bFGF)and transforming growth factor-beta 1 (TGF-beta1) in mucoepidermoid carcinomas with different malignant degree. Using immunohistochemistry (IHC) staining technique, bFGF and TGF-beta1 proteins in the mucoepidermoid carcinoma tissues with different malignant degree, including well-differentiated, moderately differentiated and poorly differentiated mucoepidermoid carcinoma, and normal salivary gland tissue were detected. The positive rate of bFGF and TGF-beta1 in normal salivary glands were apparently lower than those in malignant mucoepidermoid carcinomas (P<0.05). The positive rate of bFGF in moderately and poorly differentiated mucoepidermoid carcinoma was higher than that in the well-differentiated carcinoma (P <0.05). However, the positive expression of bFGF showed no relationship between the moderately and poorly differentiated mucoepidermoid carcinomas. The positive rate of TGF-beta1 in moderately and poorly differentiated mucoepidermoid carcinomas was lower than that in the well-differentiated carcinoma (P<0.05). The positive expression of TGF-beta1 showed no relationship between the moderately and poorly differentiated mucoepidermoid carcinomas. The expression of bFGF and TGF-beta1 showed negative correlation (r=- 0.471, P=0.0003). The expression of TGF-beta1 may inhibit the development of the mucoepidermoid carcinoma, contrariwise, the expression of bFGF may prompt the development of the mucoepidermoid carcinoma. The expression of bFGF and TGF-beta1 has a negative correlation.
    Sichuan da xue xue bao. Yi xue ban = Journal of Sichuan University. Medical science edition 09/2009; 40(5):881-4.
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    ABSTRACT: Malignant proliferating tricholemmoma is a very rare dermatic annexal tumor originated from outer root sheath cells. In this article, a case of facial multiple malignant proliferating tricholemmoma was reported, and its clinical pathologic features, differential diagnosis, treatment methods and histogenesis were discussed by reviewing relevant literatures.
    Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology 08/2009; 27(4):466-8.
  • International Journal of Oral and Maxillofacial Surgery - INT J ORAL MAXILLOFAC SURG. 01/2009; 38(5):425-426.
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    ABSTRACT: Lymphatic metastasis has always been regarded as a major prognostic indicator for disease progression and as a guide for therapeutic strategies to oral squamous cell carcinoma (OSCC), but to date, how tumor cells access and spread via the lymphatics have not been fully elucidated. Whether tumor cells metastasize by expansion and invasion of pre-existing peritumoral lymphatics or by the induction and invasion of newly formed lymphatics within tumors is controversial. In order to address this issue and find out the clinicopathological significance of intratumoral lymphangiogenesis, we investigated 86 archival specimens from patients with OSCC, quantitating lymph vessels by immunostaining with D2-40. We also quantified lymphatic invasion and examined the possible associations of all the above parameters with clinicopathological features and outcome. Higher intratumoral lymphatic density (ILD) and peritumoral lymphatic density (PLD) were both significantly associated with the presence of lymph node metastasis at the time of diagnosis and the outcome of the post-operation biopsy of 77 patients (P = 0.001). Higher ILD was significantly associated with a higher incidence of intratumoral lymphatic invasion, peritumoral lymphatic invasion and recurrence of tumor (P = 0.001 and P = 0.041 and P = 0.001, respectively). Patients with higher ILD exhibited shorter 5-year cumulative and disease-free survival (P = 0.001). Thus, lymphangiogenesis indeed occurs in oral squamous cell carcinoma; ILD might be used as an index to inflect the aggression of the disease, to evaluate the status of lymphatic metastasis, to separate patients at higher risk of an adverse clinical outcome.
    Journal of Oral Pathology and Medicine 12/2008; 37(10):616-25. · 2.06 Impact Factor
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    ABSTRACT: To study the relationship between the expression of thrombospondin-1 (TSP-1) and the angiogenesis in mucoepidermoid carcinoma. Immunohistochemistry were applied to detect the expression of TSP-1 and the value of microvessel density (MVD) in 45 mucoepidermoid carcinoma patients. Positive expressions of TSP-1 protein were detected in 26 of the 45 (57. 78%) cases. Most positive staining for TSP-1 was observed in the cytoplasm of the cancer cells, some of those were in the extracellular matrix. The mean MVD in 45 cases with mucoepidermoid carcinoma was 60. 68 +/- 19.84 vessels per 100 field of vision. Tumors with a high expression of TSP-1 showed a low value of MVD and the correlation between TSP-1 immunocompetence and microvessel density was highly significant (r(s) = -0.942, P < 0.001). The TSP-1 is expressed in most mucoepidermoid carcinoma and were associated with neovascularization. TSP-1 is likely to inhibit the extensive neovascularization and increased TSP-1 expression might inhibit angiogenic phenotype in mucoepidermoid carcinoma.
    Sichuan da xue xue bao. Yi xue ban = Journal of Sichuan University. Medical science edition 10/2008; 39(5):763-5.
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    ABSTRACT: Researchers have recently demonstrated that thrombospondin-1 (TSP-1) has an important function in regulating neovascularization. Whether it inhibits or accelerates neovascularization, however, is still controversial. We found few reports about the correlation between TSP-1 and vascularization in mucoepidermoid carcinoma. In this research, the distribution and expression of TSP-1 in mucoepidermoid carcinoma were investigated. We also analyzed (1) the correlation between the expression of TSP-1 and microvessel density (MVD), as an indicator of neovascularization activity, and (2) the effect of TSP-1 on neovascularization and tumor growth in the subcutaneous xenotransplanted model of mucoepidermoid carcinoma. (1) The sites and intensity of expression of TSP-1 and the MVD were analyzed in 45 cases of mucoepidermoid carcinoma after surgery by the method of streptavidin-peroxidase (SP) immunohistochemistry; and (2) recombinant human thrombospondin-1 (rhTSP-1) was injected twice a week for five consecutive weeks around the tumor in the subcutaneous xenotransplanted tumor model of mucoepidermoid carcinoma in nude mice. Each week, the tumor size was measured, in order to draw the growth curve of the xenotransplanted tumor model of mucoepidermoid carcinoma, and MVD was measured. (1) The positive expression of TSP-1 protein was 57.78% (26/45). Most positive staining for TSP-1 was found in the cytoplasm of the cancer cells, while some staining occurred in the extracellular matrix. The mean MVD in 45 cases of mucoepidermoid carcinoma was 58.17 +/- 19.77 per 100 visual fields. Tumors with a high expression of TSP-1 showed a low MVD value, and the TSP-1 immunocompetence and microvessel density showed a significant negative correlation (r(s) = -0.947, P < 0.001). (2) The xenotransplanted tumors with the injection doses of 1.25, 0.75 and 0.25 microg/ml respectively were 36.97%, 53.36% and 73.61% of the size of the control group ((451 +/- 92), (651 +/- 113), (898 +/- 86) and (1220 +/- 157) mm(3) respectively, F = 53.167, P < 0.001), and their weights were respectively 35.14%, 51.35% and 70.27% of the control group ((1.3 +/- 0.5), (1.9 +/- 0.5), (2.6 +/- 0.3), and (3.7 +/- 0.7) g respectively, F = 62.669, P < 0.001). Their MVDs were 25.00%, 45.93%, and 72.20% respectively of the control group and concentration dependent (15.43 +/- 3.45, 28.35 +/- 4.24, 44.57 +/- 3.35 and 61.73 +/- 5.43 per 100 visual fields respectively, F = 54.582, P < 0.001). The TSP-1 has a higher expression in mucoepidermoid carcinoma and the expression has a significant negative correlation with neovascularization. The TSP-1 inhibits neovascularization and tumor growth, and it might be a new biological therapy for treatment of patients with mucoepidermoid carcinoma.
    Chinese medical journal 10/2008; 121(19):1875-81. · 0.90 Impact Factor
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    ABSTRACT: To study the expression of inhibitor-1 of DNA binding/differentiation-1 (Id-1) and thrombospondin-1 (TSP-1) genes in mucoepidermoid carcinoma of different malignant degree and analyze the relationship between them. Using immunohistochemistry (IHC) staining technique, TSP-1 and Id-1 proteins in the mucoepidermoid carcinoma of different malignant degree, including well-differentiated, moderately differentiated and poorly differentiated mucoepidermoid carcinoma, and normal salivary gland tissues were detected. The positive rate of Id-1 and TSP-1 in normal salivary glands were apparently lower than that in malignant mucoepidermoid carcinoma(P = 0.000, P = 0.013). The positive rate of Id-1 in moderately and poorly differentiated mucoepidermoid carcinoma was higher than that of the well-differentiated (P = 0.001, P = 0.002). However, the positive expression of Id-1 showed no relationship between the moderately and poorly differentiated mucoepidermoid carcinoma(P > 0.05). The positive rate of TSP-1 in poorly differentiated mucoepidermoid carcinoma was less than that of the well-differentiated(P = 0.014). The positive expression of TSP-1 showed no relationship between the moderately and poorly differentiated mucoepidermoid carcinoma(P > 0.05), and the positive expression of it also showed no relationship between the moderately and well differentiated mucoepidermoid carcinoma (P > 0.05). The expression of Id-1 and TSP-1 showed negative correlation(r = -0.394, P = 0.002). The expression of TSP-1 may inhibit the development of the mucoepidermoid carcinoma, contrarily, the expression of Id-1 may prompt the development of the mucoepidermoid carcinoma. The expression of Id-1 and TSP-1 has negative correlation.
    Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology 08/2008; 26(4):425-9.
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    ABSTRACT: Differentiating lymphatic vessels from blood vessels is difficult, partly due to the lack of a specific method for identifying lymphatics. A new lymphatic vessel-reactive antibody, D2-40 has recently become commercially available. We examined the selectivity of D2-40 for lymphatics in oral neoplastic lesions for discrimination from blood vessels. Formalin-fixed, paraffin-embedded sections of oral lymphangiomas (n = 3), oral hemangiomas (n = 7), and oral squamous cell carcinomas (OSCC, n = 46) were double immunostained with D2-40 and anti-CD34 monoclonal antibodies (MoAb) using ENVISION-polymer technique with 5-bromo-4-chloro-3-indoxyl-phosphate (BCIP)/nitroblue tetrazolium chloride (NBT) and 3,3'-diaminobenzidine (DAB) as color reagents, respectively. Results: In the oral lymphangiomas and hemangiomas D2-40 was detected in all lymphatics, while all blood vessels were positive for CD34. In OSCC, number of vessels for lymphatics (P < 0.01) and for blood vessels in the perineoplastic areas were significantly greater than those in intratumoral areas. These results indicate that lymphatic proliferation might be much more extensive in the peritumoral area than intratumoral.
    Journal of Oral Pathology and Medicine 08/2005; 34(6):334-9. · 2.06 Impact Factor
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    ABSTRACT: To investigate the microbial contents presented on the surface of mucosa in the oral cavity of patients who accepted radiotherapy, and to provide the evidences of controlling post-radiotherapeutic infections. 32 patients (19 males and 13 females) aged from 37 - 72 received radiotherapy after oral squamous cell carcinomas operation were selected. Samples of saliva were obtained from the radiated center and opposite mucosa before and after radiotherapy. The detective amount, detective ratio and constituent ratio were analysed by cultivation and identification. Streptococci, Candida albicans and Pseudomonas aeruginosa significantly increased on both sides of the oral mucosa while Neisseria and Actinobacillus decreased on radiated region after the radiotherapy. Radiotherapy has great effects on oral bacteria and pathogenic organism may play a role in post-radiotherapy infections. It is necessary to do bacteria culture and choose sensitive antibiotics regularly for post-radiotherapeutic patients.
    Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology 05/2005; 23(2):128-9, 135.