Several cancer treatments stimulate the autophagic process and when autophagy is inhibited, cancer cells show an enhanced response to multiple treatments. These findings have nourished the theory that autophagy provides cancer cells with a survival advantage during stressful conditions, including exposure to therapeutics. Can plaquenil cause hives Hydroxychloroquine moa lupus The ratio of LC3-II to LC3-I was also upregulated by RS9 treatment at both 6 and 24 h after NaIO 3 treatment. Chloroquine co-treatment further upregulated the levels of these proteins Fig. 4 A, C. Notably, the autophagy substrate p62/SQSTM1 was transiently upregulated by RS9 treatment only at 6 h after NaIO 3 treatment Fig. 4 A, D. Chloroquine Inhibits Autophagy to Potentiate Antiestrogen Responsiveness in ERþ Breast Cancer Katherine L. Cook 1, Anni W€arri, David R. Soto-Pantoja2, Pamela AG. Clarke1, M. Idalia Cruz, Alan Zwart1, and Robert Clarke1 Abstract PurposeEstrogenreceptor-aERa-targetedtherapiesincludingtamoxifenTAMorFaslodexICIare used to treat ERþ breast cancers. Up to 50% of tumors will acquire resistance to these interventions. Autophagy is a catabolic process through which eukaryotic cells degrade disposable, ectopic or damaged cytoplasmic material. The inhibition or hyperactivation of autophagy has been linked to the. In this review we examine two approaches to modulate autophagy as complementary cancer treatment: inhibition and induction. Therefore, interference with the autophagic response can potentially enhance the efficacy of cancer therapy. Pharmacological treatment with chloroquine inhibits autophagy in vivo In vitro and in vivo effects of MK2206 and chloroquine., Chloroquine Inhibits Autophagy to Potentiate Antiestrogen. Plaquenil for sjorensChloroquine kidney disorders problems Jun 15, 2014 Resistance to endocrine therapies remains a critical limitation in their ability of these agent to cure some patients. Autophagy is a key pathway in the development of endocrine resistance in breast cancer, and targeting autophagy can reverse antiestrogen resistance 6. Chloroquine, an anti-malarial drug. Hydroxychloroquine inhibits autophagy. - PubMed Central PMC. Pharmacological modulation of autophagy therapeutic.. Pharmacological inhibition of autophagy by 3-MA attenuates.. Cell culture experiments, pharmacological inhibition is more kinetically controllable, and is the most frequently employed strategy for both in vitro and in vivo studies. The most widely employed chemicals that inhibit the last stage of autophagy are chloroquine CQ, bafilomycin A 1 BafA 1, and lysosomal protease inhibitor cocktails 11. Chloroquine is a lysosomal inhibitor and has been shown to reverse autophagy by accumulating in lysosomes, disturbing the vacuolar H+ ATPase responsible for lysosomal acidification and blocking autophagy. CQ is one such pharmacological inhibitor of autophagy that has been extensively used in research. It inhibits late stages of autophagy and may induce cell death even under conditions where inhibitors of early autophagy cannot 72 Fig. 1b.