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ABSTRACT: A luminescent Zn(II) complex 1, ZnL2Cl2.2H2O has been synthesized where L=2,2',2''-(1,3,5-benzenetriyltrimethylidyne) as a yellow crystal. Single crystal X-ray analysis of the compound 1 shows a distorted tetrahedral structure. The compound 1 crystallizes in monoclinic, space group C2/c with a = 20.3151(19), b = 8.7299(9), c = 24.626(2) angstroms, beta = 107.474(2) degrees , V = 4165.9(7) A3. At room temperature, the complex 1 exhibits an intense blue emission at 474 nm upon 380 nm excitation.
Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy 02/2008; 71(2):584-7. · 2.10 Impact Factor
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Zhonghua bing li xue za zhi Chinese journal of pathology 12/2007; 36(11):768-9.
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ABSTRACT: To investigate the correlation between HPV16 and the development of laryngeal squamous cell carcinoma by studying the effects of HPV16 E6 and E7 oncogene on the proliferation and differentiation of human laryngeal squamous carcinoma cell line.
Cationic phosphonolipid was used to transfect pLXSN16E6E7 into Lscc-02 high differentiation laryngeal squamous cell carcinoma cell line, the cells transfected by the vector pLXSN and Lscc-02 cells served as control groups. The changes of proliferation and differentiation were measured in vitro and in vivo.
The proliferation was quicker in experimental group. The average A ratio reached to 2.96, which was higher than 1.90 and 1.85 of control groups. The clone forming rate was 23.6% in experimental group, which was higher than 12.7% and 12.0% of control groups. Serum-dependent became lower in experimental group. The Ki-67 positive expression rate was markedly increased and cytokeratin 13 positive expression rate was markedly decreased in experimental group as compared with control groups. The Ki-67 positive expression rates were 93.8%, 80.7% and 79.2% respectively. The cytokeratin 13 positive expression rate were 80.9%, 91.0% and 93.7% respectively. The latent period and internal double time of transplant tumor were short in experimental group compared with control groups. The latent period were 19 d, 28 d and 30 d respectively. The internal double time of transplant tumor was 2.15 d, 3.28 d and 3.47 d respectively. The volume of transplant tumor was smaller in the same period in experimental group. The cells of transplant tumor in experimental group showed an image of small size, great allotype and a trend of low differentiation.
HPV16 E6 and E7 can promote the proliferation and inhibit the differentiation of Lscc-02 laryngeal squamous cell carcinoma cells which suggest HPV16 may play an important role in the development of laryngeal squamous cell carcinoma.
Zhonghua er bi yan hou tou jing wai ke za zhi = Chinese journal of otorhinolaryngology head and neck surgery 11/2007; 42(10):774-8.
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ABSTRACT: The present study was to investigate the effect of 1,25(OH)2D3 on the proliferation and apoptosis of Lscc-02 laryngeal squamous cell carcinoma cell line.
Lscc-02 human laryngeal squamous cell carcinoma cell line was treated with 1,25(OH)2D3. Cell proliferation was evaluated by MTT assay, distribution of cell cycle and rate of apoptosis determined by flow cytometry, and cell morphology and structure observed by microscopy.
The results showed that(10(-10) - 10(-7)) mol/L 1,25(OH)2D3 inhibited the proliferation of Lscc-02 cell line, and the inhibitory rate was positively associated with concentration of 1,25(OH)2D3 and treatment time. Cell cycle arrest in G0 /G1 phase and induction of apoptosis occurred after 1,25(OH)2D3.
1,25(OH)2D3 can inhibit proliferation and induce apoptosis in Lscc-02 laryngeal squamous cell carcinoma cell line in vitro, which suggests that 1,25(OH)2D3 will be potential for the therapy of laryngeal squamous cell carcinoma.
Lin chuang er bi yan hou ke za zhi = Journal of clinical otorhinolaryngology 07/2006; 20(12):538-40, 544.
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ABSTRACT: To establish a human laryngeal carcinoma cell line unassociated with human papillomavirus (HPV).
Viable tissue of a well-differentiated laryngeal squamous cell carcinoma was obtained and tested negative for the presence of HPV by polymerase chain reaction. Minced tissue fragments were then transplanted subcutaneously into nude mice. After two successive passages, the tumor tissue was seeded into culture flasks and incubated in a medium containing 10% fetal bovine serum, insulin and epidermal growth factor. Tumor cell phenotype and molecular features were determined by various methods.
A stable cell line, designated as Lscc-02, was successfully established after 86 culture passages. The cells grew as a monolayer with epithelioid features. The cell doubling time was approximately 39.1 hours. The human origin of the tumor cells was confirmed by karyotype analysis. The squamous epithelial phenotype was demonstrated by the immunopositivity of anti-cytokeratin antibodies and ultrastructural presence of tonofilaments and desmosomes. The malignant nature of the cells was documented by their clonal formation in soft-agar and tumorigenicity in nude mice. Lscc-02 cells expressed carcinoembryonic antigen (CEA) and were negative for HPV DNA.
This newly established Lscc-02 laryngeal squamous cell carcinoma cell line may be a useful model for investigating laryngeal carcinoma unrelated to HPV infection, and the role of HPV in the progression of human laryngeal carcinoma.
Zhonghua bing li xue za zhi Chinese journal of pathology 09/2005; 34(8):533-6.
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ABSTRACT: To study the feasibility of alpha-cyanoacrylate medical adhesive in fixation of intratemporal facial nerve when nerve was repaired within chitin chamber, and to investigate the nerve regeneration.
Nerve defect of 6 mm was made in left intratemporal facial nerves of 48 rabbits. All the defects were bridged with chitin chamber and were fixed by alpha-cyanoacrylate medical adhesive, surgical suture and natural union. Nerve function test and histomorphological examination were carried out at 1 month and 3 months after repair.
It was observed that the nerve was fixed firmly to the chamber with no crack or crease by alpha-cyanoacrylate medical adhesive. The regenerated new nerve fibers were more regular and denser and the neurological function recovered much better in the group fixed by alpha-cyanoacrylate medical adhesive than in the groups those fixed by surgical suture and natural union.
The medical adhesive is strong in adhesion and beneficial to nerve repair; repair of intratemporal facial nerve defect within chitin chamber fixed by alpha-cyanoacrylate medical adhesive is feasible, simple and timesaving.
Zhongguo xiu fu chong jian wai ke za zhi = Zhongguo xiufu chongjian waike zazhi = Chinese journal of reparative and reconstructive surgery 06/2002; 16(3):158-60.
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ABSTRACT: A complete vibrational spectra analysis of the title complex is performed in this paper. The molecular geometry, binding, electron structure and spectroscopic properties for the title complex are studied in detail by PM3 or ZINDO/S method. It has been found that this complex has a planar structure belonging to the symmetry point group C2v and its ground state is the spin doublet state. By comparison with the observed results, it can be concluded that PM3 methods are reliable to calculate the vibrational spectra of this molecule. It is worth noting that the scientific method of assigning vibrational spectra for a complicated molecule containing metal is established herein for the first time by giving main fixed points and pivotal vibrational units. Besides the regular symbols, the new defined symbols η and M play an important role in describing the vibrational modes accurately and vividly.
Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy 01/2002; · 2.10 Impact Factor
