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https://www.readbyqxmd.com/read/29083904/insights-on-the-realgar-crystal-under-pressure-from-xp-pcm-and-periodic-model-calculations
#1
Chiara Caratelli, Roberto Cammi, Riccardo Chelli, Marco Pagliai, Gianni Cardini, Vincenzo Schettino
The spectroscopic properties of As4S4 with pressure have been computed by the quantum mechanical XP-PCM method and by density functional theory periodic calculations. The comparison has allowed the interpretation of the available experimental data. By comparison of the two methods and with experiments, we show that the XP-PCM method is able to reproduce the same behavior of the periodic calculations with much lower computational cost allowing to be adopted as a first choice computational tool for a qualitative interpretation of molecular crystals properties under pressure...
November 10, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29048129/realgar-nanoparticles-versus-ato-arsenic-compounds-induce-in%C3%A2-vitro-and-in%C3%A2-vivo-activity-against-multiple-myeloma
#2
Danka Cholujova, Zdenka Bujnakova, Erika Dutkova, Teru Hideshima, Richard W Groen, Constantine S Mitsiades, Paul G Richardson, David M Dorfman, Peter Balaz, Kenneth C Anderson, Jana Jakubikova
Multiple myeloma (MM), a B cell malignancy characterized by clonal proliferation of plasma cells in the bone marrow, remains incurable despite the use of novel and conventional therapies. In this study, we demonstrated MM cell cytotoxicity triggered by realgar (REA; As4 S4 ) nanoparticles (NREA) versus Arsenic trioxide (ATO) against MM cell lines and patient cells. Both NREA and ATO showed in vivo anti-MM activity, resulting in significantly decreased tumour burden. The anti-MM activity of NREA and ATO is associated with apoptosis, evidenced by DNA fragmentation, depletion of mitochondrial membrane potential, cleavage of caspases and anti-apoptotic proteins...
October 19, 2017: British Journal of Haematology
https://www.readbyqxmd.com/read/29027420/-research-on-whole-blending-end-point-evaluation-method-of-angong-niuhuang-wan-based-on-qbd-concept
#3
Xiao-Na Liu, Qiu-Sheng Zheng, Xiao-Qing Che, Zhi-Sheng Wu, Yan-Jiang Qiao
The blending end-point determination of Angong Niuhuang Wan (AGNH) is a key technology problem. The control strategy based on quality by design (QbD) concept proposes a whole blending end-point determination method, and provides a methodology for blending the Chinese materia medica containing mineral substances. Based on QbD concept, the laser induced breakdown spectroscopy (LIBS) was used to assess the cinnabar, realgar and pearl powder blending of AGNH in a pilot-scale experiment, especially the whole blending end-point in this study...
March 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28991530/combination-of-lc-ms-and-gc-ms-based-metabolomics-to-study-the-hepatotoxic-effect-of-realgar-nanoparticles-in-rats
#4
Mo-Han Zhang, Jia-Qing Chen, Hui-Min Guo, Rui-Ting Li, Yi-Qiao Gao, Yuan Tian, Zun-Jian Zhang, Yin Huang
Realgar nanoparticles (NPs) are increasingly used as therapeutic agents for their enhanced anti-proliferation effect and cytotoxicity on cancer cells. However, the alteration of particle size may enhance biological reactivity as well as toxicity. A LC/MS and GC/MS based metabolomics approach was employed to explore the mechanism of realgar NPs-induced hepatotoxicity and identify potential biomarkers. Male Sprague-Dawley rats were administrated intragastrically with realgar or realgar NPs at a dose of 1.0 g·kg(-1)·d(-1) for 28 days and toxic effects of realgar NPs on liver tissues were examined by biochemical indicator analysis and histopathologic examination...
September 2017: Chinese Journal of Natural Medicines
https://www.readbyqxmd.com/read/28963909/effects-of-arsenic-disulfide-on-apoptosis-histone-acetylation-toll-like-receptor-2-activation-and-erythropoiesis-in-bone-marrow-mononuclear-cells-of-myelodysplastic-syndromes-patients-in-vitro
#5
Ming Xu, Jian-Ye Ren, Yuan-Cheng Guo, Bai-Xue Xu, Qing Zeng, Qi Hu, Yong-Ming Zhou, Jia-Hui Lu
OBJECTIVE: As the main component of traditional Chinese medicine realgar, arsenic disulfide (As2S2) is widely used in treating myelodysplastic syndromes (MDS). The goal of the current study is to assess the effects of As2S2 on bone marrow mononuclear cells (BMMNC) of MDS. METHODS: BMMNCs were obtained from 10 lower risk MDS patients, 5 higher risk MDS patients, and 3 healthy controls. Then, the cells were treated with As2S2 for 48h, using vorinostat (also known as SAHA) as control...
November 2017: Leukemia Research
https://www.readbyqxmd.com/read/28952270/-effect-of-clinical-doses-of-realgar-indigo-naturalis-formula-and-large-dose-of-realgar-on-cyp450s-of-rat-liver
#6
Huan-Hua Xu, Mei-Xi Wang, Hong-Ling Tan, Yu-Guang Wang, Xiang-Lin Tang, Cheng-Rong Xiao, Hua Li, Yue Gao, Zeng-Chun Ma
To investigate the effect of clinical dose of Realgar-Indigo Naturais formula (RIF) and large-dose of Realgar on main drug-metabolizing enzymes CYP450s of rat liver, as well as its regulatory effect on mRNA expression. Wistar rats were administrated orally with tested drugs for 14 days. A Cocktail method combined with HPLC-MS/MS was used in the determination of 4 cytochrome P450 isozymes (CYP1A2, CYP2B, CYP3A and CYP2C) in liver of the rats, and the mRNA expression levels of the above subtypes were detected by real-time fluorescent quantitative PCR...
February 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28934679/the-kinetics-of-white-blood-cell-and-the-predictive-factors-of-leukocytosis-under-oral-or-intravenous-arsenic-as-the-first-line-treatment-for-acute-promyelocytic-leukemia
#7
Fang Wang, Jin-Song Jia, Jing Wang, Ting Zhao, Qian Jiang, Hao Jiang, Hong-Hu Zhu
OBJECTIVE: We aimed to compare the kinetics of white blood cell (WBC) and explore predictive factors of leukocytosis in non-high-risk acute promyelocytic leukemia (APL), with oral arsenic plus all-trans retinoic acid (ATRA) or intravenous arsenic trioxide (ATO) plus ATRA as a first-line treatment. METHODS: The absolute count, doubling time and peak time of WBC were analyzed in 64 newly diagnosed non-high-risk APL patients who were treated with different induction regimens containing either oral Realgar-indigo naturalis formula (RIF) (n=35) or ATO (n=29)...
October 2017: Leukemia Research
https://www.readbyqxmd.com/read/28925144/-induction-and-analysis-for-nir-features-of-frequently-used-mineral-traditional-chinese-medicines
#8
Long Chen, Ming-Yang Yuan, Ke-Li Chen
In order to provide theoretical basis for the rapid identification of mineral traditional Chinese medicines(TCM) with near infrared (NIR)diffuse reflectance spectroscopy, Characteristic NIR spectra of 51 kinds of mineral TCMs were generalized and compared on the basis of the previous research, and the characteristic spectral bands were determined and analyzed by referring to mineralogical and geological literatures. It turned out that the NIR features of mineral TCMs were mainly at 8 000-4 000 cm ⁻¹ wavebands, which can be assigned as the absorption of water, -OH and[CO3 ²⁻] and so on...
October 2016: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28881766/nfatc3-mediates-the-sensitivity-of-gastric-cancer-cells-to-arsenic-sulfide
#9
Xiuli Zhang, Ting Kang, Lian Zhang, Yingying Tong, Wenping Ding, Siyu Chen
Arsenic sulfide (As4S4) is the main component of Realgar which is widely used in traditional Chinese medicine. Previously we showed that As4S4 inhibited the proliferation of colon cancer cells through regulating nuclear factor of activated T cells (NFAT) pathway. Here we explore the role of NFAT in gastric cancer. We showed that As4S4 inhibited the expression of NFATc1, NFATc3, and NFATc4, and modulated the expression of NFATc2 accompanying with p53. The baseline expression of NFATc3 varied distinctly in gastric cancer cell lines (AGS, MGC803, MKN28, MKN45, and SGC7901) and the sensitivity of these cells to As4S4 was dissimilar, with AGS and MGC803 cells showing higher sensitivity while the SGC7901 cells relatively resistant...
August 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/28864167/a-review-of-cinnabar-hgs-and-or-realgar-as4s4-containing-traditional-medicines
#10
REVIEW
Jie Liu, Li-Xin Wei, Qi Wang, Yuan-Fu Lu, Feng Zhang, Jing-Zhen Shi, Cen Li, M George Cherian
ETHNOPHARMOCOLOGICAL RELEVANCE: Herbo-metallic preparations have a long history in the treatment of diseases, and are still used today for refractory diseases, as adjuncts to standard therapy, or for economic reasons in developing countries. AIM OF THE REVIEW: This review uses cinnabar (HgS) and realgar (As4S4) as mineral examples to discuss their occurrence, therapeutic use, pharmacology, toxicity in traditional medicine mixtures, and research perspectives. MATERIALS AND METHODS: A literature search on cinnabar and realgar from PubMed, Chinese pharmacopeia, Google and other sources was carried out...
August 31, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28790918/accumulation-of-arsenic-speciation-and-in-vivo-toxicity-following-oral-administration-of-a-chinese-patent-medicine-xiao-er-zhi-bao-wan-in-rats
#11
Jiaoyang Luo, Xu Han, Xiaowen Dou, Lei Zhang, Shihai Yang, Meihua Yang
Realgar-containing traditional Chinese medicines such as Xiao-Er-Zhi-Bao-Wan (XEZBW), have been widely used for thousands of years. However, events associated with arsenic-induced ailments have increasingly become a public concern. To address the toxicity of XEZBW, we studied the histopathology and blood biochemistry of rats exposed to XEZBW using technology like high-performance liquid chromatography-inductively coupled mass spectrometry to determine arsenic speciation. Our results demonstrated that dimethylarsinic acid (DMA) increased from 18...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28673699/plasma-metabolomics-study-of-the-hepatoprotective-effect-of-glycyrrhetinic-acid-on-realgar-induced-sub-chronic-hepatotoxicity-in-mice-via-1-h-nmr-analysis
#12
Taoguang Huo, Ying Fang, Yinghua Zhang, Yanlei Wang, Cong Feng, Mingmei Yuan, Shouyun Wang, Mo Chen, Hong Jiang
ETHNOPHARMACOLOGICAL RELEVANCE: Realgar, a type of mineral drug that contains arsenic, is concurrently used with Glycyrrhizae Radx et Rhizoma to reduce its toxicity in many Chinese herbal formulations. Glycyrrhetinic acid (GA) is the bioactive ingredient in Glycyrrhizae Radx et Rhizoma. In this study, the protective effects of GA on realgar-induced hepatotoxicity was investigated using (1)H nuclear magnetic resonance ((1)H NMR)-based metabolomic approaches. MATERIALS AND METHODS: Mice were divided into control, GA, realgar, and GA and realgar co-administration groups...
July 1, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28532516/properties-of-realgar-bioleaching-using-an-extremely-acidophilic-bacterium-and-its-antitumor-mechanism-as-an-anticancer-agent
#13
REVIEW
Peng Chen, Ruixiang Xu, Lei Yan, Zhengrong Wu, Yan Wei, Wenbin Zhao, Xin Wang, Qinjian Xie, Hongyu Li
Realgar is a naturally occurring arsenic sulfide (or Xionghuang, in Chinese). It contains over 90% tetra-arsenic tetra-sulfide (As4S4). Currently, realgar has been confirmed the antitumor activities, both in vitro and in vivo, of realgar extracted using Acidithiobacillus ferrooxidans (A. ferrooxidans). Bioleaching, a new technology to greatly improve the use rate of arsenic extraction from realgar using bacteria, is a novel methodology that addressed a limitation of the traditional method for realgar preparation...
May 22, 2017: Biological Research
https://www.readbyqxmd.com/read/28477019/nfatc3-mediates-the-sensitivity-of-gastric-cancer-cells-to-arsenic-sulfide
#14
Xiuli Zhang, Ting Kang, Lian Zhang, Yingying Tong, Wenping Ding, Siyu Chen
Arsenic sulfide (As4S4) is the main component of Realgar which is widely used in traditional Chinese medicine. Previously we showed that As4S4 inhibited the proliferation of colon cancer cells through regulating nuclear factor of activated T cells (NFAT) pathway. Here we explore the role of NFAT in gastric cancer. We showed that As4S4 inhibited the expression of NFATc1, NFATc3, and NFATc4, and modulated the expression of NFATc2 accompanying with p53. The baseline expression of NFATc3 varied distinctly in gastric cancer cell lines (AGS, MGC803, MKN28, MKN45, and SGC7901) and the sensitivity of these cells to As4S4 was dissimilar, with AGS and MGC803 cells showing higher sensitivity while the SGC7901 cells relatively resistant...
April 18, 2017: Oncotarget
https://www.readbyqxmd.com/read/28421119/influences-of-realgar-indigo-naturalis-a-traditional-chinese-medicine-formula-on-the-main-cyp450-activities-in-rats-using-a-cocktail-method
#15
Huan-Hua Xu, Fei-Ran Hao, Mei-Xi Wang, Si-Jia Ren, Ming Li, Hong-Ling Tan, Yu-Guang Wang, Xiang-Lin Tang, Cheng-Rong Xiao, Qian-De Liang, Yue Gao, Zeng-Chun Ma
The purpose of this work was to study the influences of Realgar-Indigo naturalis (RIF) and its principal element realgar on 4 main cytochrome P450 enzymes activities in rats. A simple and efficient cocktail method was developed to detect the four probe drugs simultaneously. In this study, Wistar rats were administered intragastric RIF and realgar for 14 days; mixed probe drugs were injected into rats by caudal vein. Through analyzing the pharmacokinetic parameter of mixed probe drugs in rats, we can calculate the CYPs activities...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28347563/structural-and-elemental-characterization-of-traditional-indian-siddha-formulation-thalagak-karuppu
#16
N Kannan, S Balaji, N V Anil Kumar
BACKGROUND: The traditional Indian medicine 'Siddha' uses metals, metalloids and minerals including toxic ones with no proven toxicity. Thalagak karuppu (TK) is remarkably stable over a century and used for treating Suram (Fever), Kaasam (Cough), Elai (Tuberculosis) and Eraippu Erumal (Bronchial Asthma). OBJECTIVE: The present study addresses elemental and morphological characterization of therapeutic Siddha formulation: Thalagak karuppu (TK). MATERIALS AND METHODS: TK was purchased from the Indian Medical Practitioners Co-operative Pharmacy and Stores (IMCOPS) Ltd, Chennai, Tamilnadu, India...
July 2017: Journal of Ayurveda and Integrative Medicine
https://www.readbyqxmd.com/read/28342372/comparison-of-three-sequential-extraction-procedures-for-arsenic-fractionation-in-highly-polluted-sites
#17
COMPARATIVE STUDY
Xiang Wan, Haochen Dong, Liu Feng, Zhijia Lin, Qiuchen Luo
Three sequential extraction procedures (SEPs) including Tessier, Rauret, and Shiowatana SEPs, were compared for arsenic fractionation using highly polluted soils. In the definition context of exchangeable, reducible, oxidizable and residual fractions, with similar arsenic recovery and reproducibility, Tessier and Rauret SEPs were comparable to each other, whereas Shiowatana SEP showed higher extraction efficiency in all the first three arsenic fractions, although it might overestimate the reducible arsenic...
July 2017: Chemosphere
https://www.readbyqxmd.com/read/28188923/arsenic-sulfide-induces-apoptosis-and-autophagy-through-the-activation-of-ros-jnk-and-suppression-of-akt-mtor-signaling-pathways-in-osteosarcoma
#18
Gangyang Wang, Tao Zhang, Wei Sun, Hongsheng Wang, Fei Yin, Zhuoying Wang, Dongqing Zuo, Mengxiong Sun, Zifei Zhou, Binhui Lin, Jing Xu, Yingqi Hua, Haoqing Li, Zhengdong Cai
Osteosarcoma is a common primary malignant bone tumor, the cure rate of which has stagnated over the past 25-30 years. Arsenic sulfide (As2S2), the main active ingredient of the traditional Chinese medicine realgar, has been proved to have antitumor efficacy in several tumor types including acute promyelocytic leukemia, gastric cancer and colon cancer. Here, we investigated the efficacy and mechanism of As2S2 in osteosarcoma both in vitro and in vivo. In this study, we demonstrated that As2S2 potently suppressed cell proliferation by inducing G2/M phase arrest in various osteosarcoma cell lines...
May 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28035418/realgar-transforming-solution-displays-anticancer-potential-against-human-hepatocellular-carcinoma-hepg2-cells-by-inducing-ros
#19
Peng Song, Peng Chen, Dong Wang, Zhengrong Wu, Qiyu Gao, Aixia Wang, Ruilan Zhu, Yajun Wang, Xin Wang, Longhe Zhao, Ziyun Duan, Shuqian Zhu, Peng Cui, Yang Li, Hongyu Li
Realgar (As4S4), as a mineral drug containing arsenic compound, has been employed in clinical therapy of cancer for its good therapeutic reputation in Chinese traditional medicine. However, large dose of realgar and long period of treatment are necessary for achieving the effective blood medicine concentration due to its low bioavailability resulted from poor solubility. In this study, we obtained realgar transforming solution (RTS) using intrinsic biotransformation in microorganism, and investigated underlying mechanisms of RTS for HepG2 cells...
February 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/27987742/preparation-properties-and-anticancer-effects-of-mixed-as4s4-zns-nanoparticles-capped-by-poloxamer-407
#20
Z Bujňáková, M Baláž, M Zdurienčíková, J Sedlák, M Čaplovičová, Ľ Čaplovič, E Dutková, A Zorkovská, E Turianicová, P Baláž, O Shpotyuk, S Andrejko
Arsenic sulfide compounds have a long history of application in a traditional medicine. In recent years, realgar has been studied as a promising drug in cancer treatment. In this study, the arsenic sulfide (As4S4) nanoparticles combined with zinc sulfide (ZnS) ones in different molar ratio have been prepared by a simple mechanochemical route in a planetary mill. The successful synthesis and structural properties were confirmed and followed via X-ray diffraction and high-resolution transmission electron microscopy measurements...
February 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
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