• Asian Pacific Journal of Cancer Prevention
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• 제14권8호
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• pp.4717-4721
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• 2013

Complete surgical resection of the primary tumour is a crucial predictive step for head and neck squamous cell carcinoma (HNSCC), because incomplete resection may lead to increase in the recurrence rate. Molecular cancer markers have been investigated as potential predictors of prognosis marker, to identify patients who are at high risk of local recurrence. This retrospective study aimed to determine the prognostic correlation between p53 and eIF4E expression and clinical characteristics, recurrence and overall survival. Forty eight HNSCC patients were selected between 2006 and 2009 diagnosed at the Royal Darwin Hospital, Darwin, Northern Territory, Australia. Out of 48, only those 24 with negative surgical margins with hematoxylin and eosin (HandE) were chosedn for further analysis. A total of 77 surgical margins were obtained and subsequently analysed by immunohistochemical (IHC) staining with monoclonal p53 and polyclonal eIF4E antibodies. Contingency table and ${\chi}^2$-test were used to investigate the correlation between p53 and eIF4E expression and clinical characteristics, recurrence and overall survival of the HNSCC patients. The follow up period was 74 months (range 1-74 months). The Kaplan-Meier method was used to generate recurrence and survival curves. This is a first retrospective study of Northern Territory patients, including Indigenous and non-Indigenous Australians. Molecular study of surgical margins could help to identify patients with and without clear margins after surgery and help in choice of the most appropriate adjuvant treatment for HNSCC patients.

• 대한바이러스학회지
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• 제26권2호
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• pp.227-234
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• 1996

Prostatic carcinoma is the leading second cause of cancer in men. Previous epidermiological studies implicated human papillomavirus as an infectious agent. Since there are only limited studies on the association of HPV to prosate cancer, we examined the prevalence of HPV infections in korean prostate cancer patients. We observed that out of 26 cases, 4 cases and 5 cases were infected by HPV 16(27%) and HPV 18 (31%), respectively and 3 cases by both (46%) and at least 18 were positive for HPV (69%). For these samples, immunohistochemical detection of the p53 and proliferative cell nuclear antigen (PCNA) were also studied, using monoclonal antibodies. Sixteen of 26 (61%) showed immunostaining for p53 protein. While 8 samples with no HPV infection (100%) showed all positive for p53 protein staining, less than half of the 18 patients with any HPV infection (44%) showed p53 protein staining. These findings indicate that altered expression of p53 protein occurs in the more than half of prostate cancers, however, p53 expression is less frequent in HPV infected tissues. This implies that there might be an inverse correlation in general between HPV infection and p53 amplification. However, while 50% (4 of 8) of HPV negative prostate cancer was positive for PCNA staining, 13 out of 18 HPV infected patients (72%) were positive. Therefore HPV infection is more strongly associated with increase proliferation. In addition HPV infected cancer patients are generally in more advanced status implying that HPV infection plays a role in the development of highly malignant prostatic carcinomas, eventhough the statistical significance of this interpretation might be waited for the analysis of more cases.

• 한국산업보건학회지
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• 제25권2호
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• pp.229-235
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• 2015

Objectives: We checked hepatitis A virus antibody(anti-HAV IgG) and hepatitis B virus antibody(HBsAb) in three large companies. The result could be a guideline to establish proper health policy for Hepatitis A and B virus preventive plan in company. Methods: We investigated the seroprevalence of anti-HAV IgG and HBsAb, and demographic characteristics of employee volunteer in three companies in southern area of Korea. Company was divided three according to health policy for hepatitis A and B. Results: The seroprevalence rate of anti-HAV IgG in company A, B, and C was 53.6%, 25.8%, and 17.7%(P<0.001), respectively. The seroprevalence rate of HBsAb in workplace A, B, and C was 79.7%, 82.4%, and 70.9%(P<0.001), respectively. Anti-HAV IgG showed more considerable difference among the companies. Conclusions: The results confirmed that low rate of IgG anti-HAV and HBsAb, particularly in the company that had low level of hepatitis education and vaccination program. This study was important for establishing hepatitis education policies, to prevent and control outbreaks in companies.

• Journal of Microbiology and Biotechnology
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• 제20권12호
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• pp.1756-1763
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• 2010

Pasteurella multocida serogroup D strain, which produces P. multocida toxin (PMT), is a widespread and harmful pathogen of respiratory diseases such as pneumonia and progressive atrophic rhinitis (PAR) in swine. Vaccination has been considered the most desirable and effective approach for controlling the diseases caused by toxigenic P. multocida. To investigate the antigenicity and immunogenicity of partial fragments of recombinant PMT, recombinant proteins of the N-terminal (PMT-A), middle (PMT-B), C-terminal (PMT-C), and middle-C-terminal (PMT2.3) regions of PMT were successfully produced in an Escherichia coli expression system. The molecular masses of PMT-A, PMT-B, PMT-C, and PMT2.3 were ca. 53, 55, 35, and 84 kDa, respectively, purified by nickel-nitrilotriacetic acid (Ni-NTA) affinity column chromatography. All the recombinant proteins except for PMT-A showed immune responses to antisera obtained from a swine showing symptoms of PAR. Moreover, high titers of PMT-specific antibodies were raised from mice immunized with each of the recombinant proteins; however, the immunoreactivities of the antibodies to authentic PMT and heat-inactivated whole bacteria were different, respectively. In the protection study, the highest protection against homologous challenge was shown in the case of PMT2.3; relatively poor protections occurred for the other PMT fragments.

• Asian Pacific Journal of Cancer Prevention
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• 제15권6호
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• pp.2635-2640
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• 2014

Sera of cancer patients may contain antibodies that react with a unique group of autologous cellular antigens called tumor-associated antigens (TAAs). The present study aimed to determine whether a mini-array of multiple TAAs would enhance antibody detection and be a useful approach in esophageal cancer detection and diagnosis. Our mini-array of multiple TAAs consisted of eleven antigens, p53, pl6, Impl, CyclinB1, C-myc, RalA, p62, Survivin, Koc, CyclinD1 and CyclinE full-length recombinant proteins. Enzyme-linked immunosorbent assays (ELISA) were used to detect autoantibodies against eleven selected TAAs in 174 sera from patients with esophageal cancer, as well as 242 sera from normal individuals. In addition, positive results of ELISA were confirmed by Western blotting. In a parallel screening trial, with the successive addition of antigen to a final total of eleven TAAs, there was a stepwise increase in positive antibody reactions. The eleven TAAs were the best parallel combination, and the sensitivity and specificity in diagnosing esophageal cancer was 75.3% and 81.0%, respectively. The positive and negative predictive values were 74.0% and 82.0%, respectively, indicating that the parallel assay of eleven TAAs raised the diagnostic precision significantly. In addition, the levels of antibodies to seven antigens, comprising p53, Impl, C-myc, RalA, p62, Survivin, and CyclinD1, were significantly different in various stages of esophageal cancer, which showed that autoantibodies may be involved in the pathogenesis and progression of esophageal cancer. All in all, this study further supports our previous hypothesis that a combination of antibodies might acquire higher sensitivity for the diagnosis of certain types of cancer. A customized mini-array of multiple carefully-selected TAAs is able to enhance autoantibody detection in the immunodiagnosis of esophageal cancer and autoantibodies to TAAs might be reference indicators of clinical stage.

• Parasites, Hosts and Diseases
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• 제53권6호
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• pp.699-703
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• 2015

Cystic echinococcosis (CE) is one of the most widespread zoonotic helminthiases, which can last an asymptomatic infection for several years. The purpose of this study was to demonstrate serum antibody prevalence of CE among asymptomatic people in Uzbekistan using ELISA. A total of 2,547 serum samples were collected, 66 from confirmed CE patients and 2,481 of patients with other diseases than CE at a hospital in Tashkent, Uzbekistan. The serum samples were screened for CE specific IgG antibodies by ELISA using cystic fluid antigen obtained from sheep. The serum antibody positive rate was 89.4% (59/66) in CE and 3.6% (89/2,481) in other disease patients. The present ELISA recognized 89.4% sensitivity and 96.4% specificity. The ELISA absorbance of positive samples was distributed 0.271-0.971 for CE and 0.273-0.887 for other disease patients. The other disease patients with high absorbance over 0.3 were 50 (2.0%) who were presumed to be active CE patients. The patients in their 40s showed the highest positive rate of 5.2% (P=0.181), and women were 4.4% while men were 3.1% positive (P=0.136). The data confirmed that there are many asymptomatic patients of CE in Tashkent. It is indicated that CE is an endemic disease of public health importance in Uzbekistan.

• Parasites, Hosts and Diseases
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• 제53권5호
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• pp.605-610
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• 2015

Toxoplasmosis is considered as an important risk factor for bad obstetric history (BOH) and one of the major causes of congenitally acquired infections. The present study aimed to estimate the seropositivity of T. gondii infection and associated risk factors among the attendees of high risk pregnancy and low risk antenatal care clinic of Minia Maternity and Pediatric University Hospital, Minia, Egypt. The study was carried out from April 2013 to April 2014 through 2 phases, the first phase was case-control study, and the second phase was follow-up with intervention. A total of 120 high risk pregnant and 120 normal pregnant females were submitted to clinical examinations, serological screening for anti-Toxoplasma IgM and IgG antibodies by ELISA, and an interview questionnaire. Seropositive cases were subjected to spiramycin course treatment. The results showed that the seroprevalence of toxoplasmosis in high-risk pregnancy group was 50.8%, which was significantly different from that of normal pregnancy group (P<0.05). Analysis of seropositive women in relation to BOH showed that abortion was the commonest form of the pregnancy wastage (56.5%). The high prevalence of T. gondii seropositive cases was observed in the age group of 21-30 years. Post-delivery adverse outcome was observed in 80.3% of high-risk pregnancy group compared to 20% of normal pregnancy group. There was a statistically significant relationship between seropositivity and living in rural area, low socioeconomic level, and undercooked meat consumption (P<0.05). Serological screening for anti-Toxoplasma antibodies should be routine tests especially among high-risk pregnant women.

• Tuberculosis and Respiratory Diseases
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• 제64권4호
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• pp.278-284
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• 2008

연구배경: TRAIL 은 death 수용체(DR4, DR5)와 decoy 수용체(DcR1, DcR2)라는 독특한 수용체 시스템 덕분에 정상세포는 보호하고 종양선택적 살상능을 가진 유망한 항암제로 주목받고 있다. DR5 TRAIL 수용체는 wild-type p53 세포에서 DNA 손상항암제인 doxorubicine에 의해 발현 유도되는 p53-조절 death 수용체 유전자로 처음에 발견되었다. 폐암 조직에서 이러한 DR5와 p53 발현에 관연 연구 보고는 많지 않다. 본 연구에서 비소세포폐암 조직에서 면역조직화학적 방법을 이용하여 DR5 발현과 p53과의 상관관계를 중심으로 분석하였다. 방법: Avidin-biotinylated horseradish peroxidase complex를 이용하여 89예의 수술적 절제된 비소세포폐암 포르말린 고정조직에서 면역조직화학적 염색을 시행하였다. 1차 항체로는 anti-DR5 polyclonal antibody (Pro Sci Inc., Poway, CA)와 anti-p53 monoclonal antibody (DO-7, Novocastra, Inc, Manhasset, NY)를 이용하였다. DR5 발현에 대한 면역조직화학적 판정은 면역염색의 범위와 강도를 합산하여 다음과 같이 판정하였다; 0, non-staining; 1+, weak and diffuse(>50%) or focal (<50%) or moderate and focal; 2+, strong and focal or moderate and diffuse ; 3+, strong and diffuse. 2+ 이상을 고발현(high expression)으로 분류하였다. p53 발현 정도에 따른 p53 wild type과 mutant type의 구분은 3+의 강양성인 경우를 mutant type으로 판정하였고, 나머지 0, 1+, 2+ 발현은 wild type p53으로 판정하였다. 결과: 주변 정상폐조직에서의 DR5발현은 기관지점막에서 89%의 고발현율을 보였으나, type I, II 폐상피세포, 림프구, 평활근세포 등의 정상 세포에서는 거의 발현되지 않았다. 폐암 조직에서 DR5 고발현율은 편평상피암에서 28% (15/53), 선암에서 47% (15/32), 대세포암에서 50% (2/4)의 빈도를 보여 전반적으로 36%의 고발현율을 보였다. DR5 고발현율은 임상병기, 생존기간 등 임상 지표와 유의한 상관관계를 보여주지 못하였지만 p53 발현과는 유의한 역상관관계를 보여주었다. 결론: 비소세포폐암 조직에서 면역조직화학적 분석을 통하여 DR5 발현이 기관지점막을 제외하고는 종양 선택적임을 확인하였고 p53 발현과 유의한 역상관관계가 있음을 확인하였다. 이는 DR5가 p53 조절 유전자임을 in vivo에서 확인한 유력한 증거일 수 있다고 생각된다.

• Tuberculosis and Respiratory Diseases
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• 제45권4호
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• pp.766-775
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• 1998

연구배경: 폐암의 예후를 예측하는데 있어서 병기결정 등이 지표로 도움을 주고 있으나 같은 병기라도 상당한 예후의 차이가 있으며 환자 사이의 치료나 예후에 있어서의 다양성에 대해서는 아직 설명하기 어려운 부분이 많다. 아마도 폐암의 분자생물학적 차이가 이런 예후의 차이, 치료반응의 차이를 유발한 것으로 일반적으로 인식되고 있다. 이에 저자들은 면역화학조직 염색법으로 p53, erbB-2 그리고 CEA에 대한 발현여부를 조사하여 국내 폐암환자에서 이들 종양단백의 발현 동향과 치료반응, 예후와의 관련성을 알아보고자 본 연구를 시행하였다. 방 법: 1992년 3월부터 1997년 3월까지 충남대학교 병원에서 폐암으로 진단 받은 환자중 임의로 선택된 120명의 환자로부터 얻은 조직에서 면역조직화학 염색법으로 p53, erbB-2, CEA에 대한 발현여부를 조사하였고 치료에 대한 반응, 생존율을 비교하였다. 결 과: 면역조직화화 염색을 통한 p53, erbB-2, CEA의 발현율은 전체적으로 각각 33.7%, 59.3%, 32.6%였다. 세포형에 따른 발현율은 p53은 편평세포암 (42.5%)에서, erbB-2는 선암(68.4%)과 편평세포암(69.0%)에서 높게 발현되었고 CEA는 선암(57.9%)에서 높게 발현되었다. 소세포암에서는 모두 발현율이 비교적 낮았다. 항암화학요법에 대한 반응(response)을 비교한 결과 p53과 erbB-2는 음성인 경우, CEA는 양성인 경우 반응율이 높은 경향이 있었지만 통계적 의의는 없었다. 면역조직화학 염색을 통한 p53, erbB-2, CEA 발현유무와 2년 생존율을 비교시 erbB-2는 음성인 경우, p53과 CEA는 양성인 경우 생존율이 높은 경향이 있었지만 통계적 의의는 없었다. 결 론: 면역조직화학 염색을 통한 p53, erbB-2, CEA 종양단백의 발현이 예후인자로서의 임상적 이용 가능성은 아직 적은 것으로 여겨진다. 이에 따라 기존의 병기판정, 림프적 침습지도, 세포형 및 환자의 활동도 동의 지표가 아직까지는 더 유용하리라 판단된다. 그러나 종양단백의 예후인자로서의 유용성을 검증하기 위해선 많은 수의 환자를 대상으로 좀 더 많은 연구가 필요하리라 생각된다.

• Tuberculosis and Respiratory Diseases
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• 제46권4호
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• pp.523-532
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• 1999

연구배경: 폐암은 조기진단이 어려운 대표적인 종양이다. 최근 정상세포에서 악성조직으로 진행되는 각각의 과정에 대한 연구가 활발해 지면서 폐암의 발병과 진행에 관계하는 여러 유전자와 염색체의 이상들이 발견되고 있다. 이에 근거하여 폐암 중에서도 객담 세포진검사나 기관지내시경 검사 등으로 진단이 용이하고, 조기진단의 의의가 높은 편평상피 폐암을 대상으로 종양세포와 인접 정상 세포에서의 p53 및 c-erbB2의 발현율과 그 의의를 알아보았다. 대상 및 방법: 1995년 5월부터 1996년 11월까지 15개월 동안 편평상피 폐암으로 진단되어 폐절제술을 받은 25명의 환자를 대상으로 하여, 종양부위 및 그 인접 정상세포에서의 p53과 c-erbB2의 발현 여부를 면역조직화학적 검사법을 이용하여 조사하고 폐암의 병리적 병기 및 환자의 생존기간에 따른 발현율의 차이를 후향적으로 조사하였다. 결 과: 25명의 환자 중에서 병리적 병기 I, II가 각각 5명, IIIA가 8명, IIIB가 4명 및 IV가 3명이었다. 종양조직에서의 p53은 12명(48%), erb-B2는 3명(12%)에서 발현되었다. 인접 정상 기관지세포에서는 erb-B2는 3명(12%)에서 발현되었으나 p53은 한 예에서도 발현되지 않았다. 종양세포에서, 병기 II기 이하인 군 10명과 IIIA기 8명 및 IIIB와 IV기의 7명으로 나눠서 비교한 결과 p53이 발현된 경우는 각각 2예, 4예 및 6예로 병기가 진행될수록 발현율은 유의하게 높아졌다(p=0.009 by test of trend). 그러나 종양세포에서 이들의 발현여부에 따른 생존기간은 차이가 없었다. 결 론: p53은 정상 기관지세포에서는 전례에서 발현되지 않았으나 페종양조직에서는 발현율이 48%로 나왔으며, 발현율은 병기가 진행할수록 높아졌다. 따라서 기관지 생검조직에 p53을 이용한 면역조직화학적검사를 병행할 경우 편평상피세포 폐암의 경우 조기진단이나 병기판정에 도움이 될 것으로 추정되나 더 많은 환자를 대상으로 한 연구가 필요할 것으로 생각된다.