Lee, Hye-Won;Jeong, Eu Gene;Kim, Dong Hyun;Lee, Hyuk;Kang, Bo Hyoung;Um, Soo-Jung;Roh, Meesook;Son, Choonhee
Journal of Yeungnam Medical Science
/
v.31
no.2
/
pp.82-88
/
2014
Background: Lung cancer is the most common cause of cancer-related death worldwide and in Korea, and small cell lung cancer (SCLC) is the most deadly tumor type in the different lung cancer histology. Chemotherapy is the main strategy of the treatment for SCLC, and etoposide and platinum regimen has been the only standard chemotherapy for about 30 years. To test feasibility of weekly divided dose irinotecan and carboplatin for Korean patients is the aim of this study. Methods: Patients with histologically or cytologically confirmed extensive stage SCLC were included. Patients with limited stage (LD), who could not tolerate concurrent chemoradiotherapy were also included. All the patients received irinotecan $60mg/m^2$, carboplatin 2 area under the curve at day 1, 8, and 15 every 4 weeks. Study regimen was discontinued when the disease progressed or intolerable side effects occurred. No more than 6 cycles of chemotherapy were given. Results: Total 47 patients were enrolled, among them 9 patients were LD. Overall response rate was 74.5% (complete response, 14.9%; partial response, 59.6%). Side effects greater than grade 3 were neutropenia (25.5%), fatigue (12.8%), thrombocytopenia (8.5%), sepsis (4.3%), and pancytopenia (2.1%). There was no treatment related death. Conclusion: Weekly divided irinotecan and carboplatin regimen is effective, and safe as a first line therapy for both stage of SCLC. Large scaled, controlled study is feasible.
Objectives : Many cancers acquired resistance to chemotherapy, thus limiting its anticancer efficacy. It is known that Glutathione (GSH) is related to the development of drug resistance. The expression of GSH synthesizing glutamylcysteine ligase (GCL) was controlled by nuclear factor-E2-related factor(Nrf2). Previous studies showed that pharmacological depletion of GSH results in ROS increase, apoptotic response, and sensitization to oxidizing stimuli. In the current study, we examined Saussurea Lappa (SL) have the inhibitory effect on Nrf2 activity using human lung cancer A549 cells overexpressing Nrf2. Methods : Cell viability of A549 cells on SL treatment was determined by MTT assay. To detect the apeptosis in SL-treated A549 cells, sub-G1 population was measured by flow cytometry analysis (FACS). The level ROS was determined by FACS and fluorescence microscopy. To investigate whether SL have effect the suppression on Nrf2, we performed western blotting analysis. The GSH content was measured since GSH plays an important role in response to oxidative stress and was regulated by Nrf2. Results : A549 cells treated with an SL extract showed a substantial decrease in cell viability, along with a concomitant increase in apoptosis compared to untreated cells. Treatment of the SL extract led to increased Reactive oxygen species (ROS) production and a suppression of Nrf2. In addition, the antioxidant NAC attenuated SL-induced ROS generation, Nrf2 inhibition, and apoptosis. Taken together, these data show that the SL extract induced the production of ROS, and the inhibition of Nrf2, consequently resulting in A549 cell death. Conclusions : These results suggest that SL might be an effective agent to enhance anticancer drug sensitivity via Nrf2 inhibition.
Purpose: There has been no definite consensus on standard treatment, either local or systemic, for the Kaposi's sarcoma (KS). Radiotherapy (RT) can be a good local therapeutic choice especially in non-AIDS associated KS (NAKS) for its indolent behavior. Materials and Methods: Medical records of 17 KS patients treated with RT at the Seoul National University Hospital from February 1998 to January 2012 were retrospectively reviewed. One human immunodeficiency virus (HIV)+ patient with 3 lesions was excluded. The total number of the lesion was 23 among the 16 patients. The median follow-up period was 27.9 months. Correlation between response and variables was analyzed using the logistic regression model. Median age of the patients was 75 years. All the 23 lesions were located at the extremities. Fourteen (61%) of those had pain or local swelling as the initial presentation. Ten patients had possible causes of immunodeficiency and were regarded as iatrogenic, and other 6 were classic KS. Median dose of RT was 36 Gy. Results: No KS-related death was observed. Excluding 2 with short-term follow-up only, complete response and partial response were obtained in 2 (9%) and 19 (73%) lesions, respectively. Of those, 3 lesions underwent local progression. Six had out-of-field recurrence after RT. Symptom improvement was achieved in 13 (93%) of 14 patients. Grade 2 skin toxicities were found in 9 lesions but all got improvement after treatment. When divided into responsive and progressive group, free from progression was not related to any of the possible variables. Conclusion: RT is effective in local control of NAKS resulting great response rate.
Shikonin, a major ingredient in the traditional Chinese herb Lithospermumerythrorhizon, exhibits multiple biological functions including antimicrobial, anti-inflammatory, and antitumor effects. It has recently been reported that shikonin displays antitumor properties in many cancers. This study was aimed to investigate whether shikonin could inhibit oral squamous carcinoma cell (OSCC) growth via mechanisms of apoptosis and cell cycle arrest. The effects of shikonin on the viability and growth of OSCC cell line, SCC25 cells were assessed by MTT assay and clonogenic assays, respectively. Hoechst staining and DNA electrophoresis indicated that the shikonin-treated SCC25 cells were undergoing apoptosis. Western blotting, immunocytochemistry, confocal microscopy, flow cytometry, MMP activity, and proteasome activity also supported the finding that shikonin induces apoptosis. Shikonin treatment of SCC25 cells resulted in a time- and dose-dependent decrease in cell viability, inhibition of cell growth, and increase in apoptotic cell death. The treated SCC25 cells showed several lines of apoptotic manifestation as follows: nuclear condensation; DNA fragmentation; reduced MMP and proteasome activity; decrease in DNA contents; release of cytochrome c into cytosol; translocation of AIF and DFF40 (CAD) onto the nuclei; a significant shift in Bax/Bcl-2 ratio; and activation of caspase-9, -7, -6, and -3, as well as PARP, lamin A/C, and DFF45 (ICAD). Shikonin treatment also resulted in down-regulation of the G1 cell cycle-related proteins and up-regulation of $p27^{KIP1}$. Taken together, our present findings demonstrate that shikonin strongly inhibits cell proliferation by modulating the expression of the G1 cell cycle-related proteins, and that it induces apoptosis via the proteasome, mitochondria, and caspase cascades in SCC25 cells.
Ko Seong Gyu;Jun Chan Yong;Park Chong Hyeong;Bae Hyun Su
Journal of Physiology & Pathology in Korean Medicine
/
v.17
no.3
/
pp.819-825
/
2003
pharbitis nil and Taraxacum mongolicum are representative herbs that have been used for cancer treatment in Korean traditional medicine. To understand the molecular basis of the antitumor function, we analyzed the effect of these herbs on proliferation and apoptosis of tumor cells using a gastric cancer cell line AGS. Cell counting assay showed that pharbitis nil strongly inhibit cell proliferation Of AGS whereas Taraxacum mongolicum exhibit no detectable effect on cellular growth. [³H]thymidine uptake analysis also demonstrated that DNA replication of AGS is suppressed in a dose-dependent manner by treatment with pharbitis nil. Additionally, tryphan blue exclusion assay showed that Pharbitis nil induce apoptotic cell death of AGS in a dose-dependent. To explore whether anti antiproliferative and/or proapototic property of Pharbitis nil is associated with their effect on gene expression, we performed RT-PCR analysis of cell cycle- and apoptosis-related genes. Interestingly, mRNA expression levels of c-Jun, c-Fos, c-Myc, and Cyclin D1 were markedly reduced by Pharbitis nil. Taraxacum mongolicum also showed inhibitory action on expression of these growth-promoting protooncogene but there effects are less significant, as compared to Pharbitis nil. Furthermore, it was also found that Pharbitis nil activates expression of the p53 tumor suppressor and its downstream effector p21Waf1, which induce G1 cell cycle arrest and apoptosis. Collectively, our data demonstrate that Pharbitis nil induce growth inhibition and apoptosis of human gastric cancer cells and these effects are accompanied with down-and up-regulation of growth-regulating protooncogenes and tumor suppressor genes, respectively. This observation thus suggests that the anticancer effect of Pharbitis nil might be associated with its regulatory capability of tumor-related gene expression.
The present study was carried out to investigate the skin irritation potential of oregano oil in rabbits. A volume of 0.5 ml of test article was applied to intact and abraded skins, respectively, for 24 h in 6 healthy male New Zealand White rabbits. Parameters measured during 72 h observation period were mortality, clinical signs, body weight changes, and local irritation. Treatment-related toxic symptoms, as evidenced by anorexia and decreased locomotor activity, were observed in all rabbits tested. Two rabbits out of the 6 total died on day 2 after the application of test article due to treatment-related toxicity. The mean body weight of test animals decreased progressively during the 72 h observation period. All animals showed very slight edema at 24 h and then recovered at 72 h. These animals also showed very slight to severe erythema and/or slight eschar formation at both 24 h and 72 h. The eschar formation induced by oregano oil was not recovered at the end of additional 11-day recovery period. Based on these results, it was concluded that a single dermal application of the undiluted oregano oil caused an increased incidence of clinical signs and death and a decrease in the body weight and showed a primary irritation index score of 2.79 indicating moderate irritation.
Ju, In Gyoung;Lee, Seungmin;Choi, Jin Gyu;Oh, Myung Sook
The Korea Journal of Herbology
/
v.34
no.5
/
pp.29-37
/
2019
Objectives : Bang-poong (Saposhnikovia divaricata; SD) was traditionally used to treat inflammatory disorders. In this study, we aimed to investigate whether Bang-poong and related species including SD, Glehnia littoralis (GL), and Peucedanum japonicum (PJ) possess neuroprotective effects and acetylcholinesterase (AChE) inhibitory activities. Methods : Roots of SD, GL and PJ were extracted with distilled water (DW) or 70% ethanol (EtOH). We assessed 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging activities of the extracts. To examine neuroprotective effects, we measured cell viability in PC12 or HT22 cells after treatment of the extracts with $H_2O_2$ or amyloid-beta ($A{\beta}$). To assess anti-neuroinflammatory effects, we measured the nitric oxide (NO) levels after treatment with the extracts and lipopolysaccharide (LPS) in BV2 microglial cells. In addition, we performed AChE inhibition assay to explore effects of the extracts on the cholinergic system. Results : DW and EtOH extracts of SD, GL and PJ showed mild DPPH free radical scavenging activities. Also, DW extracts of GL and PJ showed protective effects against $H_2O_2$-induced toxicity in PC12 cells. In LPS-activated BV2 cells, EtOH extracts of SD, GL and PJ exerted inhibitory effects on NO production. Meanwhile, DW extracts of SD, GL and PJ inhibited the $A{\beta}$-induced cell death in HT22 cells. In addition, DW and EtOH extracts of GL exhibited remarkable inhibitory activities on AChE. Conclusions : We demonstrated that SD, GL and PJ exert anti-oxidative, anti-neuroinflammatory and AChE inhibitory activities. These results indicate that SD, GL and PJ could be potential candidates for neurological disorders.
Kim, Eun-Ji;Hwang, Eun-Jung;Yoo, Yeong-Min;Kim, Kyung-Hoon
The Korean Journal of Pain
/
v.35
no.4
/
pp.361-382
/
2022
The third opium war may have already started, not only due to illicit opioid trafficking from the Golden Crescent and Golden Triangle on the international front but also through indiscriminate opioid prescription and opioid diversion at home. Opioid use disorder (OUD), among unintentional injuries, has become one of the top 4 causes of death in the United States (U.S.). An OUD is defined as a problematic pattern of opioid use resulting in clinically significant impairment or distress, consisting of 2 or more of 11 problems within 1 year, as described by the Diagnostic and Statistical Manual for Mental Disorders, Fifth Edition. Observation of aberrant behaviors of OUD is also helpful for overworked clinicians. For the prevention of OUD, the Opioid Risk Tool and the Current Opioid Misuse Measure are appropriate screening tests before and during opioid administration, respectively. Treatment of OUD consists of 3 opioid-based U.S. Food and Drug Administration-approved medications, including methadone, buprenorphine, and naltrexone, and non-opioid-based symptomatic medications for reducing opioid withdrawal syndromes, such as α2 agonists, β-blockers, antidiarrheals, antiemetics, non-steroidal anti-inflammatory drugs, and benzodiazepines. There are at least 6 recommendable guidelines and essential terms related to OUD. Opioid stewardship programs are now critical to promoting appropriate use of opioid medications, improving patient outcomes, and reducing misuse of opioids, influenced by the successful implementation of antimicrobial stewardship programs. Despite the lack of previous motivation, now is the critical time for trying to reduce the risk of OUD.
Po, Wah Wah;Thein, Wynn;Khin, Phyu Phyu;Khing, Tin Myo;Han, Khin Wah Wah;Park, Chan Hee;Sohn, Uy Dong
Biomolecules & Therapeutics
/
v.28
no.2
/
pp.202-210
/
2020
Fluoxetine is used widely as an antidepressant for the treatment of cancer-related depression, but has been reported to also have anti-cancer activity. In this study, we investigated the cytotoxicity of fluoxetine to human gastric adenocarcinoma cells; as shown by the MTT assay, fluoxetine induced cell death. Subsequently, cells were treated with 10 or 20 µM fluoxetine for 24 h and analyzed. Apoptosis was confirmed by the increased number of early apoptotic cells, shown by Annexin V- propidium iodide staining. Nuclear condensation was visualized by DAPI staining. A significant increase in the expression of cleaved PARP was observed by western blotting. The pan-caspase inhibitor Z-VAD-FMK was used to detect the extent of caspase-dependent cell death. The induction of autophagy was determined by the formation of acidic vesicular organelles (AVOs), which was visualized by acridine orange staining, and the increased expression of autophagy markers, such as LC3B, Beclin 1, and p62/SQSTM 1, observed by western blotting. The expression of upstream proteins, such as p-Akt and p-mTOR, were decreased. Autophagic degradation was evaluated by using bafilomycin, an inhibitor of late-stage autophagy. Bafilomycin did not significantly enhance LC3B expression induced by fluoxetine, which suggested autophagic degradation was impaired. In addition, the co-administration of the autophagy inhibitor 3-methyladenine and fluoxetine significantly increased fluoxetine-induced apoptosis, with decreased p-Akt and markedly increased death receptor 4 and 5 expression. Our results suggested that fluoxetine simultaneously induced both protective autophagy and apoptosis and that the inhibition of autophagy enhanced fluoxetine-induced apoptosis through increased death receptor expression.
Sohn, Eun Jeong;Shin, Min Jea;Kim, Dae Won;Son, Ora;Jo, Hyo Sang;Cho, Su Bin;Park, Jung Hwan;Lee, Chi Hern;Yeo, Eun Ji;Choi, Yeon Joo;Yu, Yeon Hee;Kim, Duk-Soo;Cho, Sung-Woo;Kwon, Oh Shin;Cho, Yong-Jun;Park, Jinseu;Eum, Won Sik;Choi, Soo Young
BMB Reports
/
v.49
no.7
/
pp.382-387
/
2016
Reactive oxygen species generated under oxidative stress are involved in neuronal diseases, including ischemia. Glutathione S-transferase pi (GSTpi) is a member of the GST family and is known to play important roles in cell survival. We investigated the effect of GSTpi against oxidative stress-induced hippocampal HT-22 cell death, and its effects in an animal model of ischemic injury, using a cell-permeable PEP-1-GSTpi protein. PEP-1-GSTpi was transduced into HT-22 cells and significantly protected against H2O2-treated cell death by reducing the intracellular toxicity and regulating the signal pathways, including MAPK, Akt, Bax, and Bcl-2. PEP-1-GSTpi transduced into the hippocampus in animal brains, and markedly protected against neuronal cell death in an ischemic injury animal model. These results indicate that PEP-1-GSTpi acts as a regulator or an antioxidant to protect against oxidative stress-induced cell death. Our study suggests that PEP-1-GSTpi may have potential as a therapeutic agent for the treatment of ischemia and a variety of oxidative stress-related neuronal diseases.
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