• Asian Pacific Journal of Cancer Prevention
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• 제15권7호
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• pp.3071-3074
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• 2014

Background: To investigate the related risk factors of postoperative nosocomial pneumonia (POP) in patients withI-IIIa lung cancer. Methods: Medical records of 511 patients who underwent resection for lung cancer between January 2012 to December 2012 were retrospectively reviewed. Risk factors of postoperative pneumonia were identified and evaluated by univariate and multivariate analyses. Results: The incidence of postoperative pneumonia in these lung cancer patients was 2.9% (15 cases). Compared with 496 patients who had no pneumonia infection after operation, older age (>60), histopathological type of squamous cell carcinoma and longer surgery time (>3h) were significant risk factors by univariate analysis. Other potential risk factors such as alcohol consumption, history of smoking, hypersensitivity, hypertension, diabetes mellitus and so on were not showed such significance in this study. Further, the multivariate analysis revealed that old age (>60 years) (OR 5.813, p=0.018) and histopathological type of squamous cell carcinoma (OR 5.831, p<0.001) were also statistically significant independent risk factors for postoperative pneumonia. Conclusions: This study demonstrated that being old aged (>60 years) and having squamous cell carcinoma histopathological type might be important factors in determining the risk of postoperative pneumonia in lung cancer patients after surgery.

• Asian Pacific Journal of Cancer Prevention
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• 제13권3호
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• pp.761-766
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• 2012

Objective: Although various human cancer stem cells (CSCs) have been defined, their applications are restricted to immunocompromised models. Developing a novel CSC model which could be used in immunocompetent or transgenic mice is essential for further understanding of the biomolecular characteristics of tumor stem cells. Therefore, in this study, we analyzed murine lung cancer cells for the presence of CSCs. Methods: Side population (SP) cells were isolated by fluorescence activated cell sorting, followed by serum-free medium (SFM) culture, using Lewis lung carcinoma cell (LLC) line. The self-renewal, differentiated progeny, chemosensitivity, and tumorigenic properties in SP and non-SP cells were investigated through in vitro culture and in vivo serial transplantation. Differential expression profiles of stem cell markers were examined by RT-PCR. Results: The SP cell fraction comprised 1.1% of the total LLC population. SP cells were available to grow in SFM, and had significantly enhanced capacity for cell proliferation and colony formation. They were also more resistant to cisplatin in comparison to non-SP cells, and displayed increased tumorigenic ability. Moreover, SP cells showed higher mRNA expression of Oct-4, ABCG2, and CD44. Conclusion: We identified SP cells from a murine lung carcinoma, which possess well-known characteristics of CSCs. Our study established a useful model that should allow investigation of the biological features and pharmacosensitivity of lung CSCs, both in vitro and in syngeneic immunocompetent or transgenic/knockout mice.

• Molecules and Cells
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• 제42권8호
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• pp.604-616
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• 2019

Phosphoserine phosphatase (PSPH) is one of the key enzymes of the L-serine synthesis pathway. PSPH is reported to affect the progression and survival of several cancers in an L-serine synthesis-independent manner, but the mechanism remains elusive. We demonstrate that PSPH promotes lung cancer progression through a noncanonical L-serine-independent pathway. PSPH was significantly associated with the prognosis of lung cancer patients and regulated the invasion and colony formation of lung cancer cells. Interestingly, L-serine had no effect on the altered invasion and colony formation by PSPH. Upon measuring the phosphatase activity of PSPH on a serine-phosphorylated peptide, we found that PSPH dephosphorylated phospho-serine in peptide sequences. To identify the target proteins of PSPH, we analyzed the protein phosphorylation profile and the PSPH-interacting protein profile using proteomic analyses and found one putative target protein, IRS-1. Immunoprecipitation and immunoblot assays validated a specific interaction between PSPH and IRS-1 and the dephosphorylation of phospho-IRS-1 by PSPH in lung cancer cells. We suggest that the specific interaction and dephosphorylation activity of PSPH have novel therapeutic potential for lung cancer treatment, while the metabolic activity of PSPH, as a therapeutic target, is controversial.

• Asian Pacific Journal of Cancer Prevention
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• 제15권22호
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• pp.9611-9614
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• 2014

Purpose: To investigate the clinical value in lung cancer of a combination of four serum tumor markers, haptoglobin (Hp), carcinoembryonic antigen (CEA), neuron specific enolase (NSE) as well as the cytokeratin 19 fragment (CYFRA21-1). Materials and Methods: Serum Hp (with immune-turbidimetric method), CEA, NSE, CYFRA21-1 (with chemiluminescence method) level were assessed in 193 patients with lung cancer, 87 patients with benign lung disease and 150 healthy controls. Differences of expression were compared among groups, and joint effects of these tumor markers for the diagnosis of lung cancer were analyzed. Results: Serum tumor marker levels in patients with lung cancer were obviously higher than those with benign lung disease and normal controls (p<0.01). The sensitivities of Hp, CEA, NSE and CYFRA21-1 were 43.5%, 40.9%, 23.3% and 41.5%, with specificities of 90.7%, 99.2%, 97.9% and 97.9%. Four tumor markers combined together could produce a positive detection rate of 85.0%, significantly higher than that of any single test. With squamous carcinomas, the positive detection rates with Hp and CYFRA21-1 were higher than that of other markers. In the adenocarcinoma case, the positive detection rate of CEA was higher than that of other markers. For small cell carcinomas, the positive detection rate of NSE was highest. The area under receiver operating characteristic curve ($AUC^{ROC}$) of Hp in squamous carcinoma (0.805) was higher than in adenocarcinoma (0.664) and small cell carcinoma (0.665). Conclusions: Hp can be used as a new serum tumor marker for lung cancer. Combination detection of Hp, CEA, NSE and CYFRA21-1 could significantly improve the sensitivity and specificity in diagnosis of lung cancer, and could be useful for pathological typing.

• Asian Pacific Journal of Cancer Prevention
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• 제14권3호
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• pp.1937-1943
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• 2013

Altered expression or function of manganese superoxide dismutase (MnSOD) has been shown to be associated with cancer risk but assessment of gene polymorphisms has resulted in inconclusive data. Here a search of published data was made and 22 studies were recruited, covering 20,025 case and control subjects, for meta-analyses of the association of MnSOD polymorphisms with the risk of prostate, esophageal, and lung cancers. The data on 12 studies of prostate cancer (including 4,182 cases and 6,885 controls) showed a statistically significant association with the risk of development in co-dominant models and dominant models, but not in the recessive model. Subgroup analysis showed there was no statistically significant association of MnSOD polymorphisms with aggressive or nonaggressive prostate cancer in different genetic models. In addition, the data on four studies of esophageal cancer containing 620 cases and 909 controls showed a statistically significant association between MnSOD polymorphisms and risk in all comparison models. In contrast, the data on six studies of lung cancer with 3,375 cases and 4,050 controls showed that MnSOD polymorphisms were significantly associated with the decreased risk of lung cancer in the homozygote and dominant models, but not the heterozygote model. A subgroup analysis of the combination of MnSOD polymorphisms with tobacco smokers did not show any significant association with lung cancer risk, histological type, or clinical stage of lung cancer. The data from the current study indicated that the Ala allele MnSOD polymorphism is associated with increased risk of prostate and esophageal cancers, but with decreased risk of lung cancer. The underlying molecular mechanisms warrant further investigation.

• Asian Pacific Journal of Cancer Prevention
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• 제13권6호
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• pp.2491-2494
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• 2012

The current study was performed to assess any association between the methylenetetrahydrofolate reductase (MTHFR) C677T polymorphism and risk of lung cancer in Henan province. This case-control study involved94 patients with newly histological confirmed lung cancer and 78 healthy controls. Genotyping was achieved with peripheral blood lymphocytes DNA and association of the polymorphism with risk of lung cancer was estimated by unconditional logistic regression analysis. The frequencies of the MTHFR 667TT genotype were 37.2% in cases compared with 23.1% in controls (${\chi}^2$ = 4.008, P = 0.045). Individuals with the 667CC/CT genotype displayed a significantly reduced risk of lung cancer compared with those with the TT genotypes [adjusted odds ratio (OR), 0.506; 95% confidence interval (95% CI), 0.258 - 0.991]. The C667T polymorphism might have a significant effect on the occurrence of lung cancer in Henan province.

• Asian Pacific Journal of Cancer Prevention
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• 제15권21호
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• pp.9259-9264
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• 2014

Background: Previous studies concerning the association between the 5,10-methylenetetrahydrofolate reductase (MTHFR) C677T gene polymorphism with lung cancer in Asian populations have provided inconclusive findings. Aim: A meta-analysis was performed to investigate a more reliable association between MTHFR C677T polymorphism and lung cancer in Asians. Materials and Methods: A comprehensive search was conducted to identify all case-control studies of MTHFR polymorphisms and lung cancer in Asia, using odds ratios (ORs) with 95% confidence intervals (CIs) to assess the strength of any association. Results: Meta-analysis results suggested that the MTHFR C677T polymorphism contributed to an increased lung cancer risk in Asian populations (for T vs C: OR=1.11, 95%CI=1.0-1.23; for CT vs CC: OR= 1.1, 95%CI= 0.95-1.2 ; for TT+CT vs CC: OR=1.13, 95%CI=1.0-1.30; for TT vs CC: OR=1.25, 95%CI=1.01-1.30; for TT vs CT+CC: OR=1.16, 95%CI=1.0-1.36). Conclusions: MTHFR C677T polymorphism is significantly associated with lung cancer in Asians.

• 대한두경부종양학회지
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• 제32권2호
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• pp.69-72
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• 2016

Lung cancer is one of high mortality malignancy. It is known that skin metastasis from lung cancer is uncommon. We report a very rare case of finger tip metastasis from double primary cancer of the lung and lower lip. A 79 year-old man diagnosed with non small cell lung cancer presented with protruding solid mass in his lower lip. It showed central necrosis with purulent discharge. It had appeared rapidly growing features. Simultaneously, another solid mass accompanying painful swelling without skin lesion was found in his left middle finger tip. Both two solid masses were moderately differentiated squamous cell carcinomas. Lower lip mass was a primary cancer, while middle finger tip mass was diagnosed with clinically metastatic cancer from lung or lower lip, which means that it had double primary cancer origin.

• Asian Pacific Journal of Cancer Prevention
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• 제15권1호
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• pp.309-314
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• 2014

Purpose: Cigarette smoking causes many kinds of cancer, and it is more closely related with lung cancer, rather than other cancers. Smoking is the leading cause of lung cancer and ninety percent of the smokers are male in China, but there is little published data concerning the psychological responses in the male smokers with lung cancer and its influence on the symptom burden. The aim of the study was to verify the hypothesis that male smokers with lung cancer have more positive attitude and less symptom burden, comparing to male non-smokers. Methods: A total of 194 men with cancer in West China Hospital, Sichuan, China, were assessed by self-administered questionnaire. Psychological response was measured by the Chinese version of Mini-Mental Adjustment to Cancer scale (Mini-MAC), and symptom burden was measured by the physical symptom distress scale from the Rotterdam Symptom Checklist (RSCL). Results: We found that smokers with lung cancer got higher scores in positive attitude and a smaller symptom burden than non-smokers. Patients with education lower than high school got higher scores of positive attitude compared to college graduate patients (p=0.038). Smokers with lung cancer who knew the potential carcinogenicity of cigarette showed less negative emotions (p=0.011). The psychological response was not affected by age, clinical stage, cell type, smoking duration and amount. Conclusions: Male smokers with lung cancer have a more positive attitude and fewer symptoms, comparing to male non-smokers. Appropriate psychological intervention for non-smokers with lung cancer deserves more attention.

• Tuberculosis and Respiratory Diseases
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• 제49권4호
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• pp.441-452
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• 2000

연구배경 : 특발성 폐섬유화증에서는 폐암이 호발하는 것으로 알려져 있다. 그동안 이러한 폐암의 호발은 '반혼암'이라는 개념으로 설명되어 왔고 전통적으로는 조직형 중 선암이 가장 많다고 알려져 있었으나 최근에는 편평상피암이 가장 많다는 보고도 있어 논란이 있었다. 그동안의 대부분 연구에서 대상 환자들은 높은 흡연력을 가진 흡연자들이었으나 이 점을 고려하여 섬유화와 연관된 폐암만을 따로 분리하여 분석한 연구는 없었다. 본 연구에서는 특발성 폐섬유화증에 발생한 폐암 중 "섬유화와 연관된 폐암"과 "섬유화와 무관한 폐암"을 나누어 보고 얼마나 많은 폐암이 섬유화와 연관하여 발생하는가, 그리고 섬유화와 연관된 폐암에서는 어떤 조직형이 가장 흔한가를 알아보고자 하였다. 방법 : 1988년 1월부터 1998년 7월 사이에 서울대학교 병원에서 특발성 폐섬유화증에 병발된 폐암으로 진단 받은 환자들을 대상으로 하여 후향적으로 연구를 하였다. 흡연력, 폐암과 특발성 폐섬유화증의 진단 시기, 폐암의 조직형, 폐암의 위치를 조사하였는데 특히 폐암이 섬유화가 진행된 폐실질에서 발생하였는지 여부를 조사하였다. 특발성 폐섬유화증에서 발생하는 폐암중 섬유화와 직접 관련되어 발생하는 폐암이 얼마나 되는지 평가하고자 폐암의 발생 위치에 섬유화가 동반 되어 있는가에 따라 폐암을 분류하려고 시도하였다. 즉, 흉부 전산화 단층 촬영을 검토하여 폐암이 섬유화 병변이 있는 위치에 발생한 경우를 "섬유화와 연관된 폐암"으로, 섬유화 병변과 무관한 위치에 발생한 폐암을 "섬유화와 무관한 폐암"으로 정의하였다. 특발성 폐섬유화증 환자에서 발생한 폐암의 조직형 빈도를 비교하기 위한 대조군으로 1997년도 한국중앙암등록사업 연례보고서 중 폐암의 조직형 분포를 사용하였다. 결과 : 57명의 환자들(남자 54명, 여자 3명)이 대상이 되었다. 특발성 폐섬유화증으로 추적 관찰 중 폐암을 진단 받은 환자가 11%인 6명이었고 나머지 환자들은 폐암과 특발성 폐섬유화증을 동시에 진단받았다. 94.2%인 49명이 흡연자였고 평균 흡연량 47.1$\pm$21.9갑년으로 높은 흡연율을 보였다. 폐암의 위치와 섬유화와의 연관성에 따라 분류하였을 때 "섬유화와 연관된 폐암"이 42명(80.8%), "섬유화와 무관한 폐암"이 10명(19.2%) 이었으며 섬유화와 무관한 위치에 발생한 폐암은 섬유화 병변으로 인해 발생한 반흔 암이 아닌 흡연 등에 연관된 폐암으로 생각되었다. 폐암의 조직형은 전체적으로는 편평상피암이 가장 많고 한국중앙암등록사업 연례보고서 결과와 차이가 없었으나 섬유화와 연관된 폐암만을 따로 살펴 보았을 때에는 선암이 42.9%로 가장 흔한 조직형이었으며 섬유화와 무관한 폐암과는 조직형의 분포에 유의한 차이가 있었다. 결론 : 특발성 폐섬유화증과 병발된 폐암 환자의 81%는 섬유화가 진행된 부위에 폐암이 발생하여 섬유화와 연관된 폐암 발생이 인정되었으나 19%는 섬유화와 무관하게 흡연 등의 인자에 의해 폐암이 발행한 것으로 판단되었다. 전체적으로는 편평 상피암이 가장 많았으나 섬유화와 연관된 폐암만을 대상으로 하였을 때는 선암이 가장 흔한 조직형이었다.