keyword
MENU ▼
Read by QxMD icon Read
search

Chloroquine

keyword
https://www.readbyqxmd.com/read/29039550/autophagy-is-essential-for-flavopiridol%C3%A2-induced-cytotoxicity-against-mcf%C3%A2-7-breast-cancer-cells
#1
Shuo Wang, Kai Wang, Huaiquan Wang, Jiankui Han, Hukui Sun
Flavopiridol (FP) exerts antitumoral effects by triggering tumor cell cycle arrest and cytotoxicity in human breast cancer cell lines. The potent antitumor activity of FP is through its inhibition of cyclin‑dependent kinases; however, this may not be the only mechanism of action. The present study aimed to investigate whether FP is able to induce autophagy and to examine the effects of autophagy on cell death in FP‑treated MCF‑7 human breast cancer cells. MCF‑7 cells were treated with either FP alone or FP in combination with chloroquine (CQ)...
October 17, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29038303/f-actin-reorganization-by-v-atpase-inhibition-in-prostate-cancer
#2
Yamhilette Licon-Munoz, Vera Michel, Colleen A Fordyce, Karlett J Parra
The vacuolar ATPase (V-ATPase) proton pump sustains cellular pH homeostasis, and its inhibition triggers numerous stress responses. However, the cellular mechanisms involved remain largely elusive in cancer cells. We studied V-ATPase in the prostate cancer (PCa) cell line PC-3, which has characteristics of highly metastatic PCa. V-ATPase inhibitors impaired endo-lysosomal pH, vesicle trafficking, migration, and invasion. V-ATPase accrual in the Golgi and recycling endosomes suggests that traffic of internalized membrane vesicles back to the plasma membrane was particularly impaired...
October 16, 2017: Biology Open
https://www.readbyqxmd.com/read/29035245/in-vivo-and-in-vitro-models-for-scanning-drug-substances-in-malaria-prestudy
#3
Ahmet Özbilgin, İbrahim Çavuş, Alicem Nuraydın, Tuğba Kaya
OBJECTIVE: The Wolrd Health Organization (WHO) encourages all countries to investigate antimalarial drug substances derived from herbal sources with the slogan "Hunt of the Next Artemisinin" due to the emergence of resistant strains of Plasmodium species to artemisinin. In the broad and simple sense, it was planned to help guide the young researchers set in-vitro and in-vivo models of malaria in order to be used in drug research and active ingredient studies. METHODS: In-vitro study, young Plasmodium berghei trophozoites were removed from the liquid nitrogen tank and resuspended in appropriate conditions, followed by incubation with chloroquine and tetracycline at concentrations of 0...
September 2017: Türkiye Parazitolojii Dergisi
https://www.readbyqxmd.com/read/29033794/dihydroartemisinin-exerts-anti-tumor-activity-by-inducing-mitochondrion-and-endoplasmic-reticulum-apoptosis-and-autophagic-cell-death-in-human-glioblastoma-cells
#4
Chengbin Qu, Jun Ma, Xiaobai Liu, Yixue Xue, Jian Zheng, Libo Liu, Jing Liu, Zhen Li, Lei Zhang, Yunhui Liu
Glioblastoma (GBM) is the most advanced and aggressive form of gliomas. Dihydroartemisinin (DHA) has been shown to exhibit anti-tumor activity in various cancer cells. However, the effect and molecular mechanisms underlying its anti-tumor activity in human GBM cells remain to be elucidated. Our results proved that DHA treatment significantly reduced cell viability in a dose- and time-dependent manner by CCK-8 assay. Further investigation identified that the cell viability was rescued by pretreatment either with Z-VAD-FMK, 3-methyladenine (3-MA) or in combination...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/29033372/chloroquine-a-fda-approved-drug-prevents-zika-virus-infection-and-its-associated-congenital-microcephaly-in-mice
#5
Chunfeng Li, Xingliang Zhu, Xue Ji, Natalie Quanquin, Yong-Qiang Deng, Min Tian, Roghiyh Aliyari, Xiangyang Zuo, Ling Yuan, Shabbir Khan Afridi, Xiao-Feng Li, Jae U Jung, Karin Nielsen-Saines, Frank Xiao-Feng Qin, Cheng-Feng Qin, Zhiheng Xu, Genhong Cheng
Zika virus (ZIKV) has become a global public health emergency due to its rapidly expanding range and its ability to cause severe congenital defects such as microcephaly. However, there are no FDA-approved therapies or vaccines against ZIKV infection. Through our screening of viral entry inhibitors, we found that chloroquine (CQ), a commonly used antimalarial and a FDA-approved drug that has also been repurposed against other pathogens, could significantly inhibit ZIKV infection in vitro, by blocking virus internalization...
September 28, 2017: EBioMedicine
https://www.readbyqxmd.com/read/29030399/robust-lysosomal-calcium-signaling-through-channel-trpml1-is-impaired-by-lysosomal-lipid-accumulation
#6
Néstor Más Gómez, Wennan Lu, Jason C Lim, Kirill Kiselyov, Keith E Campagno, Yulia Grishchuk, Susan A Slaugenhaupt, Bruce A Pfeffer, Steven J Fliesler, Claire H Mitchell
The transient receptor potential cation channel mucolipin 1 (TRPML1) channel is a conduit for lysosomal calcium efflux, and channel activity may be affected by lysosomal contents. The lysosomes of retinal pigmented epithelial (RPE) cells are particularly susceptible to build-up of lysosomal waste products because they must degrade the outer segments phagocytosed daily from adjacent photoreceptors; incomplete degradation leads to accumulation of lipid waste in lysosomes. This study asks whether stimulation of TRPML1 can release lysosomal calcium in RPE cells and whether such release is affected by lysosomal accumulations...
October 13, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29024815/identification-of-a-novel-autophagic-inhibitor-cepharanthine-to-enhance-the-anti-cancer-property-of-dacomitinib-in-non-small-cell-lung-cancer
#7
Zheng-Hai Tang, Wen-Xiang Cao, Xia Guo, Xiao-Yang Dai, Jia-Hong Lu, Xiuping Chen, Hong Zhu, Jin-Jian Lu
Inhibition of autophagy is a promising strategy for non-small cell lung cancer (NSCLC) treatment, which is in the clinical trials. However, only chloroquine is used in clinic as an autophagic inhibitor and the inhibitory effect of chloroquine on autophagy is finite. Therefore, the development of an alternative autophagic inhibitor for NSCLC therapy becomes necessary. In the present study, cepharanthine (CEP), an alkaloid extracted from Stephania cepharantha Hayata, was identified as a novel autophagic inhibitor in NSCLC cells...
October 9, 2017: Cancer Letters
https://www.readbyqxmd.com/read/29022200/high-expression-of-the-mitophagy-related-protein-pink1-is-associated-with-a-poor-response-to-chemotherapy-and-a-poor-prognosis-for-patients-treated-with-neoadjuvant-chemotherapy-for-esophageal-squamous-cell-carcinoma
#8
Kotaro Yamashita, Hiroshi Miyata, Tomoki Makino, Yasunori Masuike, Haruna Furukawa, Koji Tanaka, Yasuhiro Miyazaki, Tsuyoshi Takahashi, Yukinori Kurokawa, Makoto Yamasaki, Kiyokazu Nakajima, Shuji Takiguchi, Eiichi Morii, Masaki Mori, Yuichiro Doki
BACKGROUND: Autophagy plays a major role in cellular homeostasis and is implicated in cancer progression. Damaged mitochondria are scavenged and eliminated by mitochondrial autophagy, referred to as mitophagy, which can promote cancer cell survival. This study investigated the expression and effects of the autophagy-related protein LC3 and the mitophagy-related protein Pink1 in human esophageal squamous cell carcinoma (ESCC). METHODS: Both LC3 and Pink1 were analyzed by immunohistochemistry in tissues from 217 ESCC patients, including 159 patients undergoing neoadjuvant chemotherapy...
October 11, 2017: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/29021560/the-thiazide-sensitive-sodium-chloride-co-transporter-ncc-is-modulated-by-site-specific-ubiquitylation
#9
Lena L Rosenbaek, Federica Rizzo, Qi Wu, Lorena Rojas-Vega, Gerardo Gamba, Nanna MacAulay, Olivier Staub, Robert A Fenton
The renal sodium chloride cotransporter, NCC, in the distal convoluted tubule is important for maintaining body Na(+) and K(+) homeostasis. Endogenous NCC is highly ubiquitylated, but the role of individual ubiquitylation sites is not established. Here, we assessed the role of 10 ubiquitylation sites for NCC function. Transient transfections of HEK293 cells with human wildtype (WT) NCC or various K to R mutants identified greater membrane abundance for K706R, K828R and K909R mutants. Relative to WT-NCC, stable tetracycline inducible MDCKI cell lines expressing K706R, K828R and K909R mutants had significantly higher total and phosphorylated NCC levels at the apical plasma membrane under basal conditions...
October 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29020373/artemether-lumefantrine-versus-chloroquine-for-the-treatment-of-uncomplicated-plasmodium-knowlesi-malaria-can-know-an-open-label-randomized-controlled-trial
#10
Matthew J Grigg, Timothy William, Bridget E Barber, Giri S Rajahram, Jayaram Menon, Emma Schimann, Christopher S Wilkes, Kaajal Patel, Arjun Chandna, Ric N Price, Tsin W Yeo, Nicholas M Anstey
Background: Plasmodium knowlesi is reported increasingly across Southeast Asia, and is the commonest cause of malaria in Malaysia. No randomized trials have assessed comparative efficacy of artemether-lumefantrine (AL) for knowlesi malaria. Methods: A randomized-controlled trial was conducted in 3 district hospitals in Sabah, Malaysia to compare the efficacy of AL against chloroquine (CQ) for uncomplicated knowlesi malaria. Participants were included if >10kg, parasitemia <20,000/μL, and had a negative Pf-HRP2 rapid-diagnostic-test...
September 4, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29018598/the-plasmodium-berghei-rc-strain-is-highly-diverged-and-harbors-putatively-novel-drug-resistance-variants
#11
Warangkhana Songsungthong, Supasak Kulawonganunchai, Alisa Wilantho, Sissades Tongsima, Pongpisid Koonyosying, Chairat Uthaipibull, Sumalee Kamchonwongpaisan, Philip J Shaw
BACKGROUND: The current first line drugs for treating uncomplicated malaria are artemisinin (ART) combination therapies. However, Plasmodium falciparum parasites resistant to ART and partner drugs are spreading, which threatens malaria control efforts. Rodent malaria species are useful models for understanding antimalarial resistance, in particular genetic variants responsible for cross resistance to different compounds. METHODS: The Plasmodium berghei RC strain (PbRC) is described as resistant to different antimalarials, including chloroquine (CQ) and ART...
2017: PeerJ
https://www.readbyqxmd.com/read/29017543/plasmodium-falciparum-uses-vitamin-e-to-avoid-oxidative-stress
#12
Rodrigo A C Sussmann, Wesley L Fotoran, Emilia A Kimura, Alejandro M Katzin
BACKGROUND: Plasmodium falciparum is sensitive to oxidative stress in vitro and in vivo, and many drugs such as artemisinin, chloroquine and cercosporin interfere in the parasite's redox system. To minimize the damage caused by reactive radicals, antioxidant enzymes and their substrates found in parasites and in erythrocytes must be functionally active. It was shown that P. falciparum synthesizes vitamin E and that usnic acid acts as an inhibitor of its biosynthesis. Vitamin E is a potent antioxidant that protects polyunsaturated fatty acids from lipid peroxidation, and this activity can be measured by detecting its oxidized product and by evaluating reactive oxygen species (ROS) levels...
October 10, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/29016333/distribution-of-mutations-associated-with-antifolate-and-chloroquine-resistance-among-imported-plasmodium-vivax-in-the-state-of-qatar
#13
Devendra Bansal, Anushree Acharya, Praveen K Bharti, Mohamed H Abdelraheem, Ashraf Elmalik, Salem Abosalah, Fahmi Y Khan, Mohamed ElKhalifa, Hargobinder Kaur, Pradyumna K Mohapatra, Rakesh Sehgal, Mohammed A Idris, Jagadish Mahanta, Neeru Singh, Hamza A Babiker, Ali A Sultan
Plasmodium vivax is the most prevalent parasite worldwide, escalating by spread of drug resistance. Currently, in Qatar, chloroquine (CQ) plus primaquine are recommended for the treatment of P. vivax malaria. The present study examined the prevalence of mutations in dihydrofolate reductase (dhfr), dihydropteroate synthase (dhps) genes and CQ resistance transporter (crt-o) genes, associated with sulphadoxine-pyrimethamine (SP) and chloroquine resistance, among imported P. vivax cases in Qatar. Blood samples were collected from patients positive for P...
October 2, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28989103/antimalarial-drug-toxicities-in-patients-with-cutaneous-lupus-and-dermatomyositis-a-retrospective-cohort-study
#14
Lavanya Mittal, Lingqiao Zhang, Rui Feng, Victoria P Werth
BACKGROUND: Although existing evidence demonstrates the efficacy of antimalarials for rheumatic skin disease, the safety of these medications, and particularly quinacrine, remain debated. OBJECTIVE: We investigate the toxicity risk associated with antimalarials in patients with cutaneous lupus erythematosus (CLE) and dermatomyositis (DM). METHODS: 532 patients (Mean age=52.29 years, Female=85.15%, Male=14.85%) were selected from two databases of CLE (69...
October 5, 2017: Journal of the American Academy of Dermatology
https://www.readbyqxmd.com/read/28988153/synthesis-and-antimalarial-evaluation-of-artesunate-polyamine-and-trioxolane-polyamine-conjugates
#15
A Norrie Pearce, Marcel Kaiser, Brent R Copp
A series of artesunate-polyamine and trioxolane-polyamine conjugates have been prepared. The conjugates were evaluated for antimalarial activity towards the K1 dual drug resistant and NF54 chloroquine-sensitive strains of Plasmodium falciparum (Pf) and for cytotoxicity towards the rat myoblast cell line L6. (Bis)-Boc-(bis)-artesunate-polyamine and (tetra)-artesunate-polyamine conjugates exhibited potent in vitro activity towards both strains of Pf, with IC50 values in the range of 0.3-1.1 nM, comparable to the parent artesunate...
September 22, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28987792/cordycepin-induces-apoptotic-cell-death-of-human-brain-cancer-through-the-modulation-of-autophagy
#16
Nipha Chaicharoenaudomrung, Thiranut Jaroonwitchawan, Parinya Noisa
Brain cancer, in particular neuroblastoma and glioblastoma, is a global challenge to human health. Cordycepin, extracted from Cordyceps ssp., has been revealed as a strong anticancer agent through several ways; however, the mechanism, by which cordycepin counteracts brain cancers, is still poorly understood. In this study, the underlying mechanisms of cordycepin against human brain cancer cells were explored. SH-SY5Y and U251 cells were being a model to represent human neuroblastoma and glioblastoma, respectively...
October 4, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28987553/seco-tiaminic-acids-b-and-c-identification-of-two-novel-3-4-seco-tirucallane-triterpenoids-isolated-from-the-root-of-entandrophragma-congo%C3%A3-nse-meliaceae
#17
Gervais Mouthé Happi, Ferdinand Mouafo Talontsi, Hartmut Laatsch, Sebastian Zühlke, Bonaventure Tchaleu Ngadjui, Michael Spiteller, Simeon Fogue Kouam
Chemical investigation of the roots of Entandrophragma congoënse (Meliaceae) led to the isolation of two new 3,4-seco-tirucallane triterpenes, namely seco-tiaminic acids B and C (1 and 2) together with nine known compounds: 3,4-secotirucalla-21-formyl-23-oxo-4(28),7,24-trien-3-oic acid (3), methyl angolensate (4), molucensin N (5), molucensin O (6), piscidinol A (7), 7α,20(S)-dihydroxy-4,24(28)-ergostadien-3-one (8), 24-methylene-cholest-5-en-3β,7α-diol (9), entilin A (10), and entilin B (11). Their structures were determined using extensive spectroscopic methods including 1D and 2D NMR, HRMS, and CD analyses; new results were compared to existing data in the literature...
October 5, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28986232/rifampicin-inhibits-rotenone-induced-microglial-inflammation-via-enhancement-of-autophagy
#18
Yanran Liang, Tianen Zhou, Ying Chen, Danyu Lin, Xiuna Jing, Sudan Peng, Dezhi Zheng, Zhifen Zeng, Ming Lei, Xia Wu, Kaixun Huang, Lianhong Yang, Songhua Xiao, Jun Liu, Enxiang Tao
Mitochondrial and autophagic dysfunction, as well as neuroinflammation, are associated with the pathophysiology of Parkinson's disease (PD). Rotenone, an inhibitor of mitochondrial complex I, has been associated as an environmental neurotoxin related to PD. Our previous studies reported that rifampicin inhibited microglia activation and production of proinflammatory mediators induced by rotenone, but the precise mechanism has not been completely elucidated. BV2 cells were pretreated for 2h with rifampicin followed by 0...
October 3, 2017: Neurotoxicology
https://www.readbyqxmd.com/read/28981387/aldh1a1-and-hltf-modulate-the-activity-of-lysosomal-autophagy-inhibitors-in-cancer-cells
#19
Shengfu Piao, Rani Ojha, Vito W Rebecca, Arabinda Samanta, Xiao-Hong Ma, Quentin Mcafee, Michael C Nicastri, Meghan Buckley, Eric Brown, Jeffrey D Winkler, Phyllis A Gimotty, Ravi K Amaravadi
Lysosomal autophagy inhibitors (LAI) such as hydroxychloroquine (HCQ) have significant activity in a subset of cancer cell lines. LAIs are being evaluated in cancer clinical trials, but genetic determinants of sensitivity to LAIs are unknown, making it difficult to predict which tumors would be most susceptible. Here we characterize differentially expressed genes in HCQ-sensitive (-S) and -resistant (-R) cancer cells. Notably, expression of canonical macroautophagy/autophagy genes was not associated with sensitivity to HCQ...
October 5, 2017: Autophagy
https://www.readbyqxmd.com/read/28981117/trehalose-ameliorates-oxidative-stress-mediated-mitochondrial-dysfunction-and-er-stress-via-selective-autophagy-stimulation-and-autophagic-flux-restoration-in-osteoarthritis-development
#20
Qian Tang, Gang Zheng, Zhenhua Feng, Yu Chen, Yiting Lou, Chenggui Wang, Xiaolei Zhang, Yu Zhang, Huazi Xu, Ping Shang, Haixiao Liu
Oxidative stress-related apoptosis and autophagy play crucial roles in the development of osteoarthritis (OA), a progressive cartilage degenerative disease with multifactorial etiologies. Here, we determined autophagic flux changes and apoptosis in human OA and tert-Butyl hydroperoxide (TBHP)-treated chondrocytes. In addition, we explored the potential protective effects of trehalose, a novel Mammalian Target of Rapamycin (mTOR)-independent autophagic inducer, in TBHP-treated mouse chondrocytes and a destabilized medial meniscus (DMM) mouse OA model...
October 5, 2017: Cell Death & Disease
keyword
keyword
41196
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"