• Asian Pacific Journal of Cancer Prevention
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• 제15권19호
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• pp.8007-8018
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• 2014

Cervical cancer is the most common gynecologic malignancy worldwide and development of new therapeutic strategies and anticancer agents is an urgent priority. Plants have remained an important source in the search for novel cytotoxic compounds and several polyphenolic flavonoids possess antitumor properties. In this review article, data about potential anticarcinogenic activity of common natural flavonoids on various human cervical cancer cell lines are compiled and analyzed showing perspectives for the use of these secondary metabolites in the treatment of cervical carcinoma as well as in the development of novel chemotherapeutic drugs. Such anticancer effects of flavonoids seem to differentially depend on the cellular type and origin of cervical carcinoma creating possibilities for specific targeting in the future. Besides the cytotoxic activity per se, several flavonoids can also contribute to the increase in efficacy of conventional therapies rendering tumor cells more sensitive to standard chemotherapeutics and irradiation. Although the current knowledge is still rather scarce and further studies are certainly needed, it is clear that natural flavonoids may have a great potential to benefit cervical cancer patients.

• Journal of Pharmaceutical Investigation
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• 제37권5호
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• pp.287-290
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• 2007

Intrinsic or acquired resistance to chemotherapeutic drugs is one of the major obstacles to effective cancer treatment. Hypoxia is widespread in solid tumors as a consequence of decreased blood flow in the tumor-derived neovasculature. The recent finding of a link between hypoxia and chemoresistance prompted us to investigate whether hypoxia induces doxorubicin resistance in human MCF-7 breast cancer cells. Low oxygen concentration decreased the doxorubicin sensitivity in MCF-7 cells. The expression of p-glycoprotein, a major MDR-related transporter, and those of apoptosis-related proteins (anti-apoptotic Bcl-2, Bcl-XL and pro-apoptotic Bax) were not altered by hypoxia in MCF-7 cells. Intracellular uptake of doxorubicin was significantly decreased under hypoxic conditions. Decreased cellular uptake of doxorubicin under hypoxia may contribute to causing doxorubicin resistance in these cells. The use of agents that can modulate the doxorubicin uptake for adjuvant therapy may contribute to improving the therapeutic efficacy of doxorubicin in breast cancer patients.

• Bulletin of the Korean Chemical Society
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• 제28권11호
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• pp.1910-1916
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• 2007

Analyzed are recent advances in design of novel boronared conjugates of synthetic and natural porphyrins and chlorins. These compounds showed high efficacy as cytotoxic agents for tumor cells in culture and as phototoxins in photodynamic therapy of tumor xenografts. Thus, boronated porphyrins and chlorins emerge as promising class of anticancer agents with potentially multiple advantages: the chemotherapeutic drugs alone and photo- and radiosensitizers in binary treatments.

• Bulletin of the Korean Chemical Society
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• 제28권11호
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• pp.1931-1938
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• 2007

Analyzed are recent advances in design of novel boronared conjugates of synthetic and natural porphyrins and chlorins. These compounds showed high efficacy as cytotoxic agents for tumor cells in culture and as phototoxins in photodynamic therapy of tumor xenografts. Thus, boronated porphyrins and chlorins emerge as promising class of anticancer agents with potentially multiple advantages: the chemotherapeutic drugs alone and photo- and radiosensitizers in binary treatments.

• Mass Spectrometry Letters
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• 제10권3호
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• pp.71-78
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• 2019

For several decades, cancer has been the primary cause of mortality worldwide. New diagnosis and regimens have been developed to improve the chemotherapeutic efficacy and the quality of life of the patients. However, cancer tissues are complex and difficult to assess. Understanding the various properties of the tumor and its environment is crucial for cancer and pharmaceutical research. Several analytical techniques have been providing new insights into cancer research. Recently, matrix-assisted laser desorption ionization (MALDI)-mass spectrometry imaging (MSI), an advanced analytical technique, has been applied to translational research. Proteomic and lipidomic profiling obtained by MALDI-MSI has been critical for biomarker discovery and for monitoring heterogenous tumor tissues. In this review, we discuss technical approaches, benefits and recent applications of MALDI-MSI as a valuable tool in cancer research, namely for diagnosis, therapy, prognosis.

• Asian Pacific Journal of Cancer Prevention
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• 제14권4호
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• pp.2599-2605
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• 2013

The study aimed to evaluate immune-stimulating effects of a well-known Thai folkloric remedy when used for adjuvant therapy with conventional chemotherapeutics for treatment of breast cancer. Immunostimulating influence of the remedy (215 mg/kg body weight per day) on NK cell activity and TNF-${\alpha}$ release from the monocytes/macrophages were investigated in a total of 15 healthy women and 13 female patients with breast cancer (Group 1). The effect of breast tumor surgery on NK cell activity was further investigated in 18 female patients with breast cancer (Group 2). NK cell cytotoxic activity was determined by chromium release cytotoxic assay using K562, an erythroleukemic cell line. TNF-${\alpha}$ release from monocytes/macrophages separated from blood samples was determined through a biological assay using actinomycin D-treated L929 mouse fibroblast cells in the presence and absence of LPS. Baseline NK cell activity of the monocytes/macrophages separated from Group 2 patients expressed as %cytotoxicity was significantly lower than in the healthy subjects at E:T ratios of 100:1 and 25:1. In healthy subjects, there was no change in NK cell cytotoxic activity (%cytotoxicity or LU) following 1 and 2 weeks of treatment with the remedy compared with the baseline at various E:T ratios but the binding activity (%binding) was significantly increased after 2 weeks of treatment. The addition of one or two conventional chemotherapeutic regimens did not significantly reduce the NK cytotoxic activity but did affect release of TNF-${\alpha}$ in both unstimulated and LPS-stimulated samples. Surgery produced a significant suppressive effect on NK cell activity. The use of the remedy as an adjunct therapy may improve therapeutic efficacy and safety profiles of conventional chemotherapeutic regimens through stimulation of the immune system in cancer patients.

• Archives of Plastic Surgery
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• 제36권3호
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• pp.269-276
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• 2009

Purpose: Local skin necrosis after extravasation of adriamycin, a widely used chemotherapeutic agent, is a common problem in cancer patients. The extravasation of chemotherapeutic agents yields severe inflammatory responses, crust formation, skin necrosis, and ulceration. Even though several treatment options have been proposed for extravasation injury, there is still controversy regarding the management of such lesions. Thus the aim of this study was to compare the efficacy of saline injection(Group 1), hydrocortisone injection(Group 2), propranolol injection(Group 3) and early surgical excision as a treatment(Group 4) in a rat extravasation model. Methods: The authors planned forty mature male Sprague - Dawley rats were divided into 4 groups and each group contained 10 rats. Administration of adriamycin($1.0mg/m{\ell}$) $1.5m{\ell}$ by subcutaneous injection on the dorsal side of the rats was followed by protocol. The treatment options were applied 2 hours after adriamycin injection. At the end of the 5th days, the presence and size of ulcers at the injection site were measured. 3 weeks after injection, a histopathologic examination was performed for each treatment and control group. T - tests were used to analyze the differences between the measurements. Results: Propranolol significantly improved tissue recovery compared with control group and other groups. These data suggest that there is little role for saline and hydrocortisone in the treatment of adriamycin extravasation injury. Conclusion: In this study, we compared some treatment methods in adriamycin extravasation model. The findings support the propranolol injection may prevent extravasation injury. However this study was performed in the laboratory using rats, and the results could be different in clinical application. Thus, more needs further investigations and clinical application.

• Journal of Pharmaceutical Investigation
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• 제36권6호
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• pp.385-392
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• 2006

Paclitaxel is an important chemotherapeutic agent for the treatment of human solid tumors. Multicellular resistance(MCR) is considered to be a major mechanism of resistance of human solid tumors to chemotherapeutic agent such as paclitaxel, which includes barriers to drug penetration through tumor tissues. Multicellular layers(MCL) cultures resemble in vivo tumor condition in terms of MCR and has been used successfully to produce clinically relevant data. In the present study, we evaluated the penetration characteristics and post-penetration anti-proliferative activity of paclitaxel using MCL of human colorectal cancer cells(DLD-1 and HT-29) grown in Transwell inserts. The penetration of $[^{14}C]-paclitaxel$ was slower than that of mannitol which penetrates via paracellular pathway in DLD-1 MCL. The penetration of $[^{14}C]-paclitaxel$ was faster in HT-29 MCL compared to DLD-1 MCL, i.e., at 10 ${\mu}M$ 100% and 40% penetration were observed after 48 hr incubation for HT-29 and DLD-1 cells, respectively. When calculated using anti-proliferative activity in the conditioned media of bottom chamber, the penetration after 24 hr was very limited(less than 50%) and concentration-dependent at the concentrations tested in both MCL's. These results suggest that limited and differential penetration of paclitaxel in tumor tissues may contribute to lower and differential efficacy against human solid tumors.

• Parasites, Hosts and Diseases
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• 제35권4호
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• pp.265-270
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• 1997

초등학생 요충의 집단 검사와 치료시 진단 방법의 한계로 인하여 다음과 같은 점을 고려하여야 한다 즉. 항문 주위 도말법 양성인 어린이와 같은 반의 어린이를 동시에 치료할 필요가 있는가\ulcorner 양성인 어린이의 가족을 동시에 치료할 필요가 있는가\ulcorner 일년에 한 번 검사 후 투약하는 것보다 검사 후 양성자는 치료를 6개월 후 한 번 더 반복하는 것이 나은가\ulcorner 이런 질문에 답하기 위하여 양성자만 치료. 전 급우와 양성자 가족 동시 치료. 양성자와 양성자 가족 동시치료 이 세 가지를 한 번만 치료하는 것과 6개월 후에 반복하는 것으로 학생 집단을 나누어 일년 후 추적 검사하여 결과를 비교하였다. 그 결과. 모든 대상자를 양성자의 가족과 동시에 치료하는 것이 일년 후 양성률의 감소에 가장 효과적임을 알 수 있었다. 또한 요충 치료에서 감염자의 유입과 더불어 가족 감염이 매우 중요한 재감염의 요인임을 다시 한 번 확인할 수 있었다. 그러나 양성률이 30% 미만으로 낮은 집단에서는 양성자만 치료하는 것도 일년 뒤의 집단의 양성률을 낮추는 데 기여함을 알 수 있 었다. 앞으로 대상 양성률이 낮을 때의 상황에 대한 조사가 더 필요하다.

• Asian Pacific Journal of Cancer Prevention
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• 제14권10호
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• pp.5855-5860
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• 2013

Phytochemicals are among the natural chemopreventive agents with most potential for delaying, blocking or reversing the initiation and promotional events of carcinogenesis. They therefore offer cancer treatment strategies to reduce cancer related death. One such promising chemopreventive agent which has attracted considerable attention is sulforaphane (SFN), which exhibits anti-cancer, anti-diabetic, and anti-microbial properties. The present study was undertaken to assess effect of SFN alone and in combination with a chemotherapeutic agent, gemcitabine, on the proliferative potential of MCF-7 cells by cell viability assay and authenticated the results by nuclear morphological examination. Further we analyzed the modulation of expression of Bcl-2 and COX-2 on treatment of these cells with SFN by RT-PCR. SFN showed cytotoxic effects on MCF-7 cells in a dose- and time-dependent manner via an apoptotic mode of cell death. In addition, a combinational treatment of SFN and gemcitabine on MCF-7 cells resulted in growth inhibition in a synergistic manner with a combination index (CI)<1. Notably, SFN was found to significantly downregulate the expression of Bcl-2, an anti-apoptotic gene, and COX-2, a gene involved in inflammation, in a time-dependent manner. These results indicate that SFN induces apoptosis and anti-inflammatory effects on MCF-7 cells via downregulation of Bcl-2 and COX-2 respectively. The combination of SFN and gemcitabine may potentiate the efficacy of gemcitabine and minimize the toxicity to normal cells. Taken together, SFN may be a potent anti-cancer agent for breast cancer treatment.