• IMMUNE NETWORK
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• 제1권1호
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• pp.45-52
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• 2001

Background: Many types of cancer become resistant to current chemotherapeutic and radiotherapeutic intervention. To overcome this situation application of gene therapy by the introduction of suicide genes followed by their prodrugs may be promising. A viral enzyme, Herpes simplex thymidine kinase (HSV-tk), which converts ganciclovir from an inactive prodrug to a cytotoxic agent by phosphorylation, are being actively investigated for use in gene therapy for cancer. The purpose of this study was to determine whether combining prodrug-activating gene therapy and irradiation might result in enhanced antitumor effects. Methods: The HSV-tk gene was cloned into the retroviral vector, pLXSN and established the clones producing retroviruses carrying the HSV-tk gene. The carcinoma cell line, HCT116 and Huh-7 were transduced with high-titer recombinant retroviruses. These cell lines were treated with ganciclovir before or after irradiation for the defining combinational effect of suicide gene therapy and radiotherapy. Results: The titers of cloned PA3 17 amphotropic retroviruses ranged from 4 to 6 X $10^6CFU/ml4$. After selectional periods, the expression of HSV-tk was confirmed by reverse-transcriptase polymerase chain reaction (RT-PCR). The growth of cells expressing HSV-tk was inhibited as increase of GCV dose after 48 hr and the growth inhibitory effect of GCV was much higher after 72 hr. When the cells transduced with HSV-tk gene were exposed to radiation, the growth inhibitory effect of GCV was significantly increased, as compared with non-transduced parental cells. Conclusions: The results suggest that the addition of HSV-tk gene therapy to standard radiation therapy may improve the effectiveness of treatment for solid tumors.

• Journal of Oral Medicine and Pain
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• 제30권3호
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• pp.319-328
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• 2005

재발성 아프타성 궤양 환자의 타액에서 구강내 궤양성 병소를 유발할 수 있고 감염성이 비교적 높은 미생물로 알려진 Herpes Simplex virus, Varicella Zoster virus, Helicobacter pylori 그리고 Candida가 발현되는지 여부와 병소의 발생과 상관관계가 있는지를 알아보고자 조선대학교 치과병원 구강내과에 내원한 재발성 아프타성 궤양을 가진 환자 29명과 대조군 29명의 타액을 이용하여 PCR과 배양을 통해 발현율을 비교한바 다음과 같은 결과를 얻었다. 1. HSV DNA는 재발성 아프타성 궤양 환자군에서 41.4%, 대조군에서 55.2%가 발현되었으나 두 군간에 유의한 차이는 없었고(P>0.05), VZV DNA는 두 군에서 모두 나타나지 않았다. 2. H. pylori DNA는 재발성 아프타성 궤양 환자군에서 27.6%, 대조군에서 48.3%가 발현되었으나 두 군간에 유의한 차이는 없었다(P>0.05). 3. Candida는 재발성 아프타성 궤양 환자군에서 13.8%, 대조군에서 6.9%가 배양되었으나 두 군간에 유의한 차이는 없었다(P>0.05). 이상의 연구를 종합하여 보았을 때, HSV, VZV, H. pylori 그리고 Candida는 재발성 아프타성 궤양의 발생에 직접적인 역할을 한다고는 볼 수 없으므로 향후 더 많은 표본을 대상으로 다른 미생물이 병소 발생의 유발요인으로 작용하는지 연구하여야 할 것으로 사료된다.

• 대한두경부종양학회지
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• 제22권2호
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• pp.130-136
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• 2006

Introduction : The sensitivity of tumor cells to radiotherapy is a critical determinant of local control and potential cure in advanced head and neck squamous cell carcinoma(HNSCC). The emergence of radioresistant tumor cells is an obstacle to cancer therapy. Most radioresistant cells have a higher proportion of cells in the Sphase of the cell cycle and a lower apoptotic fraction than radiosensitive cells. HSV replication is increased in cells that have higher S-phase fractions. NV1066 is an oncolytic herpes simplex virus type-1 mutant. We hypothesized that NV1066 replication and cytotoxicity are increased in radioresistant cells. The purpose of this study is to evaluate the antitumor efficacy of NV1066 to treat radioresistant HNSCC. Methods : Radioresistant cells were selected by treating five HNSCC cell lines with repeated conventional fractionated doses of radiation(2Gy/day), using a Cs-137 irradiator, up to a cumulative dose of 70Gy. Clonogenic cell survival and S-phase fractions were compared between radioresistant and parental radiosensitive cells. The two cell populations were then treated with NV1066 to examine viral replication, by the viral plaque assay and viral cytotoxicity. Results : Fractionated irradiation resulted in the selection of radioresistant cells. Radioresistant cells had a higher S-phase fraction(42.9%) compared to parental cells(26.2%). NV1066 replication in radioresistant cells was 7.4 times higher than in parental cells(p<0.01). Treatment with NV1066 resulted in increased cytotoxicity of 24.5% in radioresistant cells compared to parental cells(p<0.05). Conclusion : NV1066 showed increased viral replication and cytotoxicity in radioresistant HNSCC cell lines. These findings suggest a potential clinical application for this oncolytic viral therapy as treatment for radioresistant head and neck cancers.

• The Korean Journal of Pain
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• 제5권2호
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• pp.258-262
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• 1992

1991년 3월 부터 1992년 2월까지 부산대학교병원 통증치료실에 내원한 27명의 대상포진후 신경통 환자를 대상으로 하여 저출력 레이저의 치료효과를 관찰한 바를 아래와 같이 요약한다. 1) 주된 병소부위는 흉추신경분포부위이었다. 2) 70세 미만의 환자에서는 VAS의 개선율이 57%로 효과가 있었으나, 70세 이상의 환자에서는 VAS 개선율이 27%로 현저히 감소하였다. 3) 발병후 치료시간 까지의 기간이 1개월 이내인 환자는 저출력 레이저에 의한 치료효과가 좋았으나, 12개월이상 경과한 환자는 치료효과가 좋지 않았다. 4) 발병후 1개월이내에 치료를 실시한 환자의 VAS개선율이 50%가 되기까지의 평균 조사횟수는 5.7회이었다.

• Asian Pacific Journal of Cancer Prevention
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• 제16권3호
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• pp.1241-1245
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• 2015

Background: Thyroid carcinoma is the most common malignancy of the endocrine organs. Although the majority of thyroid cancer patients experience positive outcomes, anaplastic thyroid carcinoma is considered one of the most aggressive malignancies. Current therapeutic regimens do not confer a significant survival benefit, and new therapies are urgently needed. Oncolytic herpes simplex virus (oHSV) may represent a promising therapy for cancer. In the present study, we investigated the therapeutic effects of a third-generation HSV vector, $G47{\Delta}$, on various human thyroid carcinoma cell lines in vitro. Two subcutaneous (s.c.) models of anaplastic thyroid carcinoma were also established to evaluate the in vivo anti-tumor efficacy of $G47{\Delta}$. Materials and Methods: The human thyroid carcinoma cell line ARO, FRO, WRO, and KAT-5, were infected with $G47{\Delta}$ at different multiplicities of infection (MOIs) in vitro. The survival rates of infected cells were calculated each day. Two s.c. tumor models were established using ARO and FRO cells in Balb/c nude mice, which were intratumorally (i.t.) treated with either $G47{\Delta}$ or mock. Tumor volumes and mouse survival times were documented. Results: $G47{\Delta}$ was highly cytotoxic to different types of thyroid carcinomas. For ARO, FRO, and KAT-5, greater than 30% and 80% of cells were killed at MOI=0.01 and MOI=0.1, respectively on day 5. WRO cells displayed modest sensitivity to $G47{\Delta}$, with only 21% and 38% of cells killed. In the s.c. tumor model, both of the anaplastic thyroid carcinoma cell lines (ARO and FRO) were highly sensitive to $G47{\Delta}$; $G47{\Delta}$ significantly inhibited tumor growth and prolonged the survival of mice bearing s.c. ARO and FRO tumors. Conclusions: The oHSV $G47{\Delta}$ can effectively kill different types of human thyroid carcinomas in vitro. $G47{\Delta}$ significantly inhibited growth of anaplastic thyroid carcinoma in vivo and prolonged animal survival. Therefore, $G47{\Delta}$ may hold great promise for thyroid cancer patients.

• 대한생식의학회:학술대회논문집
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• 대한불임학회 2004년도 제47차 추계학술대회
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• pp.35-36
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• 2004

• 대한두경부종양학회:학술대회논문집
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• 대한두경부종양학회 2001년도 제17차 학술대회 및 제6차 심포지움
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• pp.71-71
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• 2001

• The Korean Journal of Pain
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• 제1권1호
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• pp.103-105
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• 1988

Ramsey Hunt Syndrome occurs when herpes zoster afters the facial nerve. It causes vesicular eruption of the pinna, external auditory meaturs and ear drum, severe otalgia with associated facial paralysis and vertigo. We experienced a case of Ramsey Hunt syndrome and managed it with repeated sympathetic blocks using a stellate ganglion block. We achieved early resolution of the eruption, relief of pain and prevention of postherpetic neuralgia. We concluded that SGB was effective treatment against Ramsey Hunt Syndrome.

• Archives of Pharmacal Research
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• 제13권4호
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• pp.306-309
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• 1990

The synthesis of 5-hyterocyclimethyl-2'-deoxyuridines (4a-f) has been accomplished by displacement reaction of 5-(bromomethyl)-3', 5'-di-O-acetyl-2'-deoxyuridine with heterocyclic compounds, followed by removal of acetyl protecting group with methanolic ammonia. The compoudns synthesized were evaluated the inhibitory effects on L1210 cell probiferation and antiviral activities against Herpes simplex virus type 1 (HSV-1) None of the compounds exhibited sufficient biological activities.

• 한국동물학회:학술대회논문집
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• 한국동물학회 2003년도 한국생물과학협회 학술발표대회
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• pp.62-62
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• 2003

No Abstract, See Full Text