• Journal of Preventive Veterinary Medicine
• /
• 제42권4호
• /
• pp.177-181
• /
• 2018

Disulfiram is a drug used to treat alcohol dependence. Recent studies have shown that disulfiram also has anti-cancer effects. Considering that many anti-cancer agents have side effects, including immunosuppression, it is important to check if disulfiram has some cytotoxicity to immune cells. In this study, mouse spleen cells were treated with disulfiram and the metabolic activity was measured. Disulfiram increased the cell death of spleen cells according to annexin V-FITC/PI staining analysis. In addition, disulfiram decreased the mitochondrial membrane potential of spleen cells. The toxicity of disulfiram was concentration dependent. Interestingly, disulfiram affected the population of lymphocytes and the subset of spleen cells was altered. This study provides clinicians and researchers with valuable information regarding the toxicity of disulfiram to mouse spleen cells, particularly lymphocytes.

• 전자통신동향분석
• /
• 제38권1호
• /
• pp.46-54
• /
• 2023

The announcement of the US Environmental Protection Agency that it will stop conducting or funding experimental studies on mammals by 2035 should prioritize ongoing efforts to develop and use alternative toxicity screening methods to animal testing. Toxicity screening is likely to be further developed considering the combination of human-induced pluripotent-stem-cell-derived organ-on-a-chip and multielectrode array (MEA) technologies. We briefly review the current status of MEA technology and MEA-based neuropharmacological drug screening using various cellular model systems. Highlighting the coronavirus disease pandemic, we shortly comment on the importance of early prediction of toxicity by applying artificial intelligence to the development of rapid screening methods.

• 한국환경성돌연변이발암원학회지
• /
• 제26권1호
• /
• pp.12-19
• /
• 2006

Cadmium, a human carcinogen, can induce toxicity in various cell lines and organs. Despite extensive research, the mechanisms of cadmium-induced cell toxicity and estrogenic potential in human are not clear. This study was performed to investigate cadmium-induced toxicity on human breast cancer cells: MCF-7 cells, an estrogen receptor (ER) positive breast cancer cells, and MDA-MB-231 cells, an ER negative breast cancer cells. MCF-7 cells was proved to be more sensitive than the other cell lines (IC50 = $50\;{\mu}M$ at MCF-7 cells and $120{\mu}M$ at MDA-MB-231). The expression of JNK and AP-1 transcription factors such as c-Jun and c-Fos dependent transcription were increased by cadmium treatment. Inhibition of ER activation by ER antagonist (tamoxifen or ICI 182,780) significantly recovered the viablity and inhibited apoptotic cell death. This suggested that cadmium-induced cell death in ER (+) cells was mediated by JNK/AP-1 pathway and this pathway was more stimulated by ER activated by cadmium. Co-treatment of antioxidants such as selenium (Se), butylated hydroxyanisole (BHA), glutathione (GSH), or N-acetyl-L-cysteine (NAC) recovered the cadmium-induced cell death in MCF-7 cells. Cadmium-induced lipid peroxidation was decreased by GSH, NAC, or BHA in MCF-7 cells. The expression of SOD protein was decreased by cadmium ($100{\mu}M$) but recovered by GSH, NAC, BHA, or Se. Our data showed that the cadmium-induced cell toxicity in human breast cancer cells could be protected by the antioxidants (Se, BHA, NAC, GSH, or NAC) and ER antagonist (tamoxifen or ICI 182,780). Therefore, toxicity of cadmium in breast cancer were mediated by oxidative stress and $ER{\alpha}$.

• 한국환경성돌연변이발암원학회:학술대회논문집
• /
• 한국환경성돌연변이발암원학회 2002년도 Current Trends in Toxicological Sciences
• /
• pp.135-135
• /
• 2002

• Asian Pacific Journal of Cancer Prevention
• /
• 제15권22호
• /
• pp.9813-9815
• /
• 2014

Background: This analysis was conducted to evaluate the efficacy and safety of cisplatin based chemotherapy for treating patients with cutaneous squamous cell carcinoma. Methods: Clinical studies evaluating the efficacy and safety of cisplatin based regimens on response and safety for patients with cutaneous squamous cell carcinoma were identified using a predefined search strategy. Pooled response rates (RR) of treatment were calculated. Results: In cisplatin based regimens, 4 clinical studies which including 50 patients with advanced cutaneous squamous cell carcinoma were considered eligible for inclusion. Regimens included cisplatin, doxorubicin, or vindesine. Pooled analysis suggested that, in all patients, the pooled RR was 60% (30/50) in cisplatin based regimens. Nausea and vomiting were the main side effects. No grade III or IV renal or liver toxicity were observed. No treatment related death occurred with the cisplatin based treatments. Conclusion: Evidence based analysis suggests that cisplatin based regimens are associated with a good response rate and acceptable toxicity for treating patients with cutaneous squamous cell carcinoma.

• 생명과학회지
• /
• 제7권2호
• /
• pp.79-87
• /
• 1997

vibrio vulnificus의 균체내독소의 특성을 파악하여 비브리오 패혈증의 발병원인 구명을 위한 자료를 제공하고자 생균과 균체파쇄액의 치사독성과 내열성 및 혈관투과성항진작용을 실험한 결과는 다음과 같다. 1. 환자분리균(V.vulnificus CDC B3547)과 환경분리균(V.vulnificus B57)의 독력은 차이가 없었다. 2. V.vulnificus의 균수가 $10^{7}$/ml 이상일 때 강한 치사독력이 나타났다. 3. 균체파쇄액이 독성은 80$^{\circ}$C 20분에 완전히 불활성화 되었다. 4. 균체파쇄액은 용혈성은 없었으나 세포독성은 인정되었다. 5. V.vulnificus의 새앙주에 대한 주 치사독소는 균체 내에 존해했으나 LPS와 LPprotein complex는 기존의 방법으로 분리할 수 없었다.

• 한국임상수의학회지
• /
• 제36권2호
• /
• pp.129-131
• /
• 2019

A 15-year-old intact Yorkshire terrier was presented with anorexia, lethargy, and a pale mucous membrane. A physical examination one year ago revealed right testis mass and subcutaneous petechia. Blood work revealed severe thrombocytopenia and mild anemia, and no abnormalities were found in serum chemistry or ultrasonography. The preoperative serum estrogen concentration was moderately elevated. The enlarged testis was surgically removed. A well-encapsulated mass composed of polyhedral or round with abundant eosinophilic cytoplasm containing fine granular or vacuolation were found in a histological examination of the removed tissue. The nuclei of tumor cells were round, and mitotic figures were low but neoplastic cells showed a mild invasive tendency to adjacent tissues with contained neoplastic cell emboli in one lymphatic lumen. A diagnosis of a malignant Leydig cell tumor was made. The patient recovered from surgery uneventfully, but his condition worsened despite repeated transfusions and supportive therapy, and he was euthanized according to the owner's decision. Leydig cell tumor should be included in estrogen toxicity associated with testicular mass.

• Asian Pacific Journal of Cancer Prevention
• /
• 제16권5호
• /
• pp.1971-1976
• /
• 2015

Background: To evaluate our results in terms of response, survival and toxicity profile of sunitinib among Egyptian patients with metastatic renal cell carcinoma. Materials and Methods: Between January 2010 and December 2013, 44 patients with metastatic renal cell carcinoma who received sunitinib at an oncology center of Cairo university hospitals were enrolled in this retrospective analysis. Results: The median age of the patients was 53 years, 22 (50%) having localized disease at presentation, while the remaining half of the patients presented with metastasis. At a median follow up of 19 months, 9 (21%) patients achieved partial remission, while disease was reported stable in 20 cases (45%) and progressive in 7 (16%), 4 (9%) being lost to follow up, and 4 (9%) had discontinued therapy due to toxicity. The median overall survival was 23 months (95%CI 15.2 - 30.9), while progression free survival was 12 months (95%CI 11.6 - 12.3). The most commonly reported non hematological grade 3 adverse events included mucositis (15.9%), hand-foot syndrome (13.6%), and fatigue (9%), while the predominant grade 3 or 4 laboratory abnormalities were neutropenia (6.8%), followed by anemia in 4.5% of patients. Conclusions: Our efficacy data were comparable to the published literature in terms of progression free survival and overall survival, while toxicity profile is different from Asian and western countries. However, sunitinib adverse events were manageable and tolerable in most of our Egyptian patients.

• Molecular & Cellular Toxicology
• /
• 제1권2호
• /
• pp.78-86
• /
• 2005

Dioxins, especially 2, 3, 7, 8-Tetrachlorodibenzo-p-dioxin (TCDD or dioxin), are ubiquitous environmental contaminants. TCDD is known that it has toxic effects in animals and humans, including chloracne, immune, reproductive and developmental toxicities, carcinogenicity, wasting syndrome and death. TCDD induces a broad spectrum of biological responses, including disruption of normal hormone signaling pathways, reproductive and developmental defects, immunotoxicity, liver damage, wasting syndrome and cancer. Many researches showed that TCDD induces gene expression of transcriptional factors related cell proliferation, signal transduction, immune system and cell cycle arrest at molecular and cellular levels. These toxic actions of TCDD are usually mediated with AhR (receptor, resulted from cell culture, animal and clinical studies). cDNA microarray can be used as a highly sensitive and informative marker for toxicity. Additionally, microarray analysis of dioxin-toxicity is able to provide an opportunity for the development of candidate bridging biomarkers of dioxin-toxicity. Through microarray technology, it is possible to understand the therapeutic effects of agonists within the context of toxic effects, classify new chemicals as to their complete effects on biological systems, and identify environmental factors that may influence safety.

• 약학회지
• /
• 제47권2호
• /
• pp.85-92
• /
• 2003

Seok-jeong (SJ) is a solution of various metal ions and numerous other organic substances produced through extraction and fermentation of herbs and soil using geo-microbes, and it has been shown to improve symptoms of senile dementia. In this study, we investigated the protective effects of SJ against neurotoxicity of cadmium in HT22 hippocampal neuron cell line. SJ significantly protected from the cadmium-induced decreased cell viability measured by MTT assay (p＜0.01). The protective effects of SJ against cadmium toxicity were confirmed through observing morphological changes using inverted microscope. Additionally, SJ significantly repressed the formation of lipid peroxidation induced by high concentration of cadmium, and likewise, significantly repressed the reduction of glutathione by cadmium in HT22 cells. Vitamin C at the concentration found in SJ did not show any protective effect against cadmium toxicity in HT22 cells, indicating that vitamin C may not have a major role in the protective mechanism of SJ. Taken together, these results suggest that SJ may be a valuable agent for the protection of cadmium toxicity on the neuronal cells, and that the mechanism of the action of SJ may be due to reduced lipid peroxidation and increased glutathione level.