A retrospective analysis of the clinicopathological characteristics of large cell carcinoma of the lung.

The aim of the present study was to analyze and summarize the clinicopathological characteristics of large-cell lung carcinoma (LCLC) of the lung, in order to improve the definite diagnosis rate of LCLC. Clinicopathological data of 174 patients with LCLC, confirmed pathologically, were retrospectively reviewed. The 174 cases of LCLC accounted for 5.

[Establishment and characterization of lung adenocarcinoma cell line XLA-07].

Objective: To establish and characterize a lung adenocarcinoma cell line from a female patient in Xuanwei, Yunnan province.

Methods: Surgical specimen of the lung adenocarcinoma was obtained and cultured immediately in RPMI 1640 medium with 10% fetal bovine serum and 10(5) U/L penicillin and 100 mg/L streptomycin. When stable proliferation of the cells was achieved after over 40 passages in culture, the biological features of the cell line were investigated by cell morphology, karyotyping, protein marker expression [cytokeratins (CKs), epithelial membrane antigen (EMA) and CD proteins], growth kinetics, cell cycle phase distribution, mitotic index, colony formation in soft agar, cell invasion and tumorigenicity in Balb/c nude mice.

[Expression of fragile histidine triad (FHIT) protein and Ki-67 in transformed epithelial cells induced by Yunnan tin mine dust].

Objective: To study the expression and significance of fragile histidine triad (FHIT) and Ki-67 in transformed epithelial cells induced by Yunnan tin mine dust.

Methods: Every second generation of immortalized human bronchial epithelial cells (BEAS-2B) and human embryo lung fibroblasts (WI-38) were exposed to 100 µg/ml Yunnan tin mine dust for 72 h, until the ninth generation. The cells were subsequently co-cultured from the 11th generation.

Induction of lung epithelial cell transformation and fibroblast activation by Yunnan tin mine dust and their interaction.

Tumor-stroma interactions play a significant role in tumor development and progression. Our study employed an in vitro co-culture model of epithelial cells and fibroblasts to investigate the mechanism of and interaction between lung epithelial cell transformation and fibroblast activation induced by Yunnan tin mine dust. Epithelial cell transformation was evaluated using concanavalin A agglutination and anchorage-independent growth assays, and fibroblast activation was assessed via immunohistochemistry.

[Expression of p14(ARF) and E2F-1 in lung cancer in Gejiu and Xuanwei regions of Yunnan Province].

Objective: To investigate the correlations between p14(ARF) and E2F-1, and the role of their alterations in the tumorigenesis of the lung cancer in Gejiu and Xuanwei regions in Yunnan Province for providing the important experiment basis in revealing the molecular mechanism and looking for new markers for early diagnosis of lung cancer.

Methods: The expression of p14(ARF) and E2F-1 was detected at theirs protein level by Immunohistochemistry S-P method in 30 specimens of lung cancer of Gejiu tin miners, 30 specimens of lung cancer of Xuanwei peasants and 20 specimens of normal lung tissue. E2F-1 mRNA was detected by ISH in 25 specimens of lung cancer of Gejiu tin miners, 25 specimens of lung cancer of Xuanwei peasants and 10 specimens of normal lung tissue.

[Expression of hTERT and Mad1 in lung cancer in Gejiu and Xuanwei of Yunnan Province].

Objective: To study the expression of hTERT mRNA and Mad1 protein in lung cancer of Gejiu and Xuanwei and normal lung tissue and to investigate their correlations with lung cancer.

Methods: Mad1 protein was detected by immunohistochemistry S-P method, and hTERT message RNA (mRNA) was detected by in situ hybridization (ISH) in 40 specimens of lung cancer of Gejiu Tin miners and 20 specimens of lung cancer of Xuanwei peasants and 20 specimens of normal lung tissue. The positive signals were quantitatively analyzed by HPIAS-100.

[Expression and gene mutation of cluster of differentiation 9 in lung cancer cells induced by mineral powder in Gejiu].

Objective: To investigate the expression and gene mutation of cluster of differentiation 9 (CD9) in the pathway of the mineral powder induced malignant transformation in immortalized human bronchial epithelial cells (BEAS-2B) in Gejiu.

Methods: BEAS-2B cells served as the control group and its malignant transformation cells induced by mineral powder in Gejiu were considered as experiment group. The expression of CD9 protein in 20 bottles of BEAS-2B cells and 20 bottles of malignant transformation cells was evaluated by immunocytochemistry.

[Pathological study of lung cancer induced by Yunnan tin mine dusts in F344 rats].

Objective: To set up animal models of the lung cancer induced by Yunnan tin mineral dusts (no radon) in F344 rats and to explore the process of carcinogenesis and pathologic alterations in various stages of malignant transformation in the animal models.

Methods: One hundred and ninety F344 rats were randomly divided into Yunnan tin mineral dust group (100 rats), furfural physiological saline group (30 rats), physiological saline group (30 rats) and normal control group (30 rats). The intratracheal instillation with mass fraction of 6% suspension liquid mixture Yunnan tin mineral dusts, volume fraction of 2% furfural physiological saline and physiological saline 0.

[Loss of exons of FHIT gene and FHIT protein expression in Yunnan tin miners with lung cancer].

Background & Objective: Yunnan tin miners have an extremely high incidence of lung cancer. Abnormality of the fragile histidine triad (FHIT) gene has been proved to closely relate to lung cancer development. This study was to explore the loss of exons 3, 4, 5 and 8 of FHIT gene and FHIT protein expression in Yunnan Tin miners with lung cancer.

[Establishment and biological characteristics of lung cancer cell line XWLC-05].

Background & Objective: The incidence of lung cancer is high at Xuanwei, Yunnan Province, at where the mortality rate of this disease in women is the highest in China. This study was to establish a Xuanwei woman lung adenocarcinoma cell line, and provide an in vitro experimental model for the study of preventing and treating lung cancer.

Methods: The cells derived from a surgical specimen of a woman patient with lung cancer were primarily cultured.

[Comparison of TGF-beta1 expression of lung cancer in Gejiu miners with that in non-miners in other regions].

Objective: To investigate the different expression of transforming growth factor beta(1) (TGF-beta(1)) in lung cancer specimens of Gejiu miners, and non-miners in other regions.

Methods: Thirty specimens of Gejiu miners' lung cancer and 30 specimens of non-miners' were observed in this experiment. The expression of TGF-beta(1) protein and TGF-beta(1) mRNA were detected by the methods of immunohistochemistry and in situ hybridization.