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Colloid therapy

Wei-Yuan Wang, Xiu-Fen Zhao, Xiao-Han Ju, Ping Liu, Jing Li, Ya-Wen Tang, Shu-Ping Li, Xiao-Dong Li, Fu-Gui Song
Au-methotrexate (Au-MTX) conjugates induced by sugar molecules were produced by a simple, one-pot, hydrothermal growth method. Herein, the Au(III)-MTX complexes were used as the precursors to form Au-MTX conjugates. Addition of different types of sugar molecules with abundant hydroxyl groups resulted in the formation of Au-MTX conjugates featuring distinct characteristics that could be explained by the diverse capping mechanisms of sugar molecules. That is, the instant-capping mechanism of glucose favored the generation of peanut-like Au-MTX conjugates with high colloidal stability while the post-capping mechanism of dextran and sucrose resulted in the production of Au-MTX conjugates featuring excellent near-infrared (NIR) optical properties with a long-wavelength plasmon resonance near 630-760 nm...
January 13, 2018: International Journal of Pharmaceutics
Yi Chen, Jing Li, David Oupický
This study reports on a simple method to prepare siRNA-polycation conjugate polyplexes by in situ thiol-disulfide exchange reaction. The conjugate polyplexes are prepared using thiol-terminated siRNA and a bioreducible branched polycationic inhibitor of the CXCR4 chemokine receptor (rPAMD). The rPAMD-SS-siRNA conjugate polyplexes exhibit improved colloidal stability and resistance against disassembly with heparin, serum, and physiological salt concentrations when compared with control conventional rPAMD/siRNA polyplexes...
January 17, 2018: Bioconjugate Chemistry
Zhao-Hua Miao, Kai Li, Pei-Ying Liu, Zhenglin Li, Huanjie Yang, Qingliang Zhao, Manli Chang, Qingzhu Yang, Liang Zhen, Cheng-Yan Xu
Humic acids, a major constituent of natural organic carbon resources, are naturally formed through the microbial biodegradation of animal and plant residues. Due to numerous physiologically active groups (phenol, carboxyl, and quinone), the biomedical applications of humic acid have been already investigated across different cultures for several centuries or even longer. In this work, sodium humate, the sodium salt of humic acid, is explored as phototheranostic agent for light-induced photoacoustic imaging and photothermal therapy based on intrinsic absorption in the near-infrared region...
January 15, 2018: Advanced Healthcare Materials
Subramaniyan Bharathiraja, Nhat Quang Bui, Panchanathan Manivasagan, Madhappan Santha Moorthy, Sudip Mondal, Hansu Seo, Nguyen Thanh Phuoc, Thi Tuong Vy Phan, Hyehyun Kim, Kang Dae Lee, Junghwan Oh
Palladium, a near-infrared plasmonic material has been recognized for its use in photothermal therapy as an alternative to gold nanomaterials. However, its potential application has not been explored well in biomedical applications. In the present study, palladium nanoparticles were synthesized and the surface of the particles was successfully modified with chitosan oligosaccharide (COS), which improved the biocompatibility of the particles. More importantly, the particles were functionalized with RGD peptide, which improves particle accumulation in MDA-MB-231 breast cancer cells and results in enhanced photothermal therapeutic effects under an 808-nm laser...
January 11, 2018: Scientific Reports
Lian-Huang Li, Zhi-Fen Chen, Xing-Fu Wang, Xing Liu, Wei-Zhong Jiang, Shuang-Mu Zhuo, Li-Wei Jiang, Guo-Xian Guan, Jian-Xin Chen
Most patients with rectal cancer have a better prognosis after receiving neoadjuvant therapy because of its remarkable curative effect. However, no device delivers real-time histopathologic information on treatment response to help clinicians tailor individual therapeutic strategies. We assessed the potential of multimodal nonlinear optical microscopy to monitor therapeutic responses, including tumoral and stromal responses. We found that two-photon excited fluorescence imaging can, without labeling, identify colloid response, inflammatory cell infiltration, vascular proliferation, and tumor regression...
December 5, 2017: Oncotarget
Jiulong Zhao, Chunhua Zhou, Mao Li, Jialing Li, Guixiang Li, Dan Ma, Zhaoshen Li, Duowu Zou
The two-dimensional molybdenum disulfide (MoS2) nanosheet has been extensively studied as a novel photothermal transducing agent. However, top-down exfoliation to produce MoS2 nanosheets is inefficient, and MoS2 nanosheet surface modification procedures are complex. Here, we report the synchronous synthesis and surface modification of 2D MoS2 nanosheets with a polyvinylpyrrolidone (PVP)-assisted one-pot hydrothermal method. Due to the chelating-coordinating effect between the lone-pair electrons of the PVP carbonyl oxygen and the unoccupied 4d orbitals of molybdenum, the PVP chains could graft onto the surface of MoS2 and guide the growth of the nanosheets...
December 5, 2017: Oncotarget
Dehong Hu, Zonghai Sheng, Mingting Zhu, Xiaobing Wang, Fei Yan, Chengbo Liu, Liang Song, Ming Qian, Xin Liu, Hairong Zheng
The visualization of the treatment process in situ could facilitate to accurately monitor cancer photothermal therapy (PTT), and dramatically decrease the risk of thermal damage to normal cells and tissues, which represents a major challenge for cancer precision therapy. Herein, we prepare theranostic nanoprobes (NPs) for Förster resonance energy transfer (FRET)-based dual-modal imaging-guided cancer PTT, and clear visualization of the therapeutic process. The FRET-based theranostic NPs exhibit high FRET efficiency (88...
2018: Theranostics
Kyungjin Hwang, Junsik Kwon, Jayun Cho, Yunjung Heo, John Cook-Jong Lee, Kyoungwon Jung
BACKGROUND: This study evaluated the effectiveness and clinical outcomes of the implementation of a trauma center and massive transfusion protocol (TCMTP) in a developing country without a well-established trauma system. METHODS: We included patients (1) aged >15 years, (2) with an Injury Severity Score >15, (3) who received ≥10 units of packed red blood cells (PRBCs) within 24 h, (4) who directly visited our institution from 2010 to 2016, and (5) who survived for ≥24 h...
December 31, 2017: World Journal of Surgery
N Li, R Jia, X P Gu, Z L Ma
Objective: To identify risk factors that influence the massive drainage after posterior spinal orthopaedic surgery for adolescent scoliosis. Methods: A total of 1 461 patients from 11 to 18 years old diagnosed with adolescent scoliosis who underwent first posterior spinal orthopaedic surgery in affiliated Drum Tower Hospital, Medical School of Nanjing University between November 2010 and October 2015 were retrospectively reviewed. Patients were categorized on the basis of massive or normal drainage, with the boundary 30(th) percentile of drainage/estimated blood volume...
November 28, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
Forest R Sheppard, Thomas A Mitchell, Antoni R Macko, Darren M Fryer, Leasha J Schaub, Kassandra M Ozuna, Jacob J Glaser
BACKGROUND: Hemorrhage is the leading cause of preventable death in traumatically injured civilian and military populations. Pre-hospital resuscitation largely relies on crystalloid and colloid intra-vascular expansion, as whole blood and component blood therapy are logistically arduous. In this experiment, we evaluated the bookends of Tactical Combat Casualty Care Guidelines recommendations of pre-hospital resuscitation with Hextend and whole blood in a controlled hemorrhagic shock model within non-human primates, as means of a multi-functional resuscitative fluid development...
December 20, 2017: Journal of Trauma and Acute Care Surgery
David A Roberts, Andrew D Shaw
Volume resuscitation to correct hypotension in surgical and critically ill patients is a common practice. Available evidence suggests that iatrogenic volume overload is associated with worse outcomes in established acute kidney injury. Intraoperative arterial hypotension is associated with postoperative renal dysfunction, and prompt correction with fluid management protocols that combine inotrope infusions with volume therapy targeted to indices of volume responsiveness should be considered. From the perspective of renal function, the minimum amount of intravenous fluid required to maintain perfusion and oxygen delivery is desirable...
September 2017: Best Practice & Research. Clinical Anaesthesiology
Martin Muller, David Vehlow, Bernhard Torger, Birgit Urban
BACKGROUND: In this contribution an overview is given on own work concerning drug loaded polyelectrolyte complex (PEC) nanoparticles (NP) used to functionalize bone substitute materials (BSM) for the therapy of bone defects associated with systemic bone diseases. In this context drug loaded PEC NP have certain advantages, which are exemplarily summarized herein. METHODS: Concerning preparative methods PEC NP were fabricated by controlled mixing of polycation and polyanion solutions and integration of charged drugs during and after mixing...
December 12, 2017: Current Pharmaceutical Design
Blake S Raggio, Blair M Barton, Maria C Grant, Judith A Fornadley, Jeffrey P Marino
Background: Patients with suspected thyroid malignancy often undergo preoperative laryngeal examination with a focus on vocal fold mobility. We present the unique case of a patient with invasive thyroid carcinoma who presented with dysphonia despite intact vocal fold motion. Case Report: A 73-year-old female with a remote thyroid lobectomy presented with dysphonia. Thyroid ultrasound and fine-needle aspiration revealed a 1.1-cm nodule consistent with a colloid cyst...
2017: Ochsner Journal
Roqya Najafi-Taher, Behnaz Ghaemi, Sharmin Kharazi, Samira Rasoulikoohi, Amir Amani
Highly resistant pathogens may be developed in patients with immune disorders after prolonged exposure to antibiotics, a growing threat worldwide. In order to overcome these problems, this study introduces a new class of engineered nanosystems comprising of tea tree oil nanoemulsion (TTO NE) loaded with Ag nanoparticles (NPs). Silver shows a strong toxicity towards a wide range of microorganisms. Also, TTO NE could be employed as a promising and safe antimicrobial agent for local therapies of bacterial infections...
December 7, 2017: AAPS PharmSciTech
Yi Wang, Guoqing Wei, Xiaobin Zhang, Xuehui Huang, Jingya Zhao, Xing Guo, Shaobing Zhou
Mitochondrial-targeting therapy is an emerging strategy for enhanced cancer treatment. In the present study, a multistage targeting strategy using doxorubicin-loaded magnetic composite nanoparticles is developed for enhanced efficacy of photothermal and chemical therapy. The nanoparticles with a core-shell-SS-shell architecture are composed of a core of Fe3 O4 colloidal nanocrystal clusters, an inner shell of polydopamine (PDA) functionalized with triphenylphosphonium (TPP), and an outer shell of methoxy poly(ethylene glycol) linked to the PDA by disulfide bonds...
December 4, 2017: Small
Lei Chen, Jiayao Chen, Shanshan Qiu, Ling Wen, Yan Wu, Yi Hou, Yong Wang, Jianfeng Zeng, Yuan Feng, Zhen Li, Hong Shan, Mingyuan Gao
Rapid clearance of nanoagents is a critical criterion for their clinical translation. Herein, it is reported that biodegradable and renal clearable nanoparticles are potentially useful for image-guided photothermal therapy of tumors. The multifunctional nanoparticles with excellent colloidal stability are synthesized through coordination reactions between Fe3+ ions and gallic acid (GA)/polyvinyl pyrrolidone (PVP) in aqueous solution. Detailed characterization reveals that the resulting Fe3+ /GA/PVP complex nanoparticles (FGPNs) integrate strong near-infrared absorption with paramagnetism well...
December 1, 2017: Small
Phim-On Khunsuk, Supatta Chawalitpong, Pritsana Sawutdeechaikul, Tanapat Palaga, Voravee P Hoven
A zwitterionic copolymer between methacryloyloxyethyl phosphorylcholine (MPC) and methacrylic acid (MA), PMAMPC is introduced as a potential versatile polymeric stabilizer for gold nanorods (AuNRs). The MA units in the copolymer serve as built-in feature for multiple functionalization, namely introducing additional thiol groups as active sites for binding with the AuNRs and conjugating with Doxorubicin (DOX), an anticancer drug via acid-labile hydrazone linkage. The MPC units, on the other hand, provide biocompatibility and antifouling characteristics...
November 29, 2017: Molecular Pharmaceutics
Hadeer M Abdelaziz, Mohamed Gaber, Mahmoud M Abd-Elwakil, Moustafa T Mabrouk, Mayada M Elgohary, Nayra M Kamel, Dalia M Kabary, May S Freag, Magda W Samaha, Sana M Mortada, Kadria A Elkhodairy, Jia-You Fang, Ahmed O Elzoghby
There is progressive evolution in the use of inhalable drug delivery systems (DDSs) for lung cancer therapy. The inhalation route offers many advantages, being non-invasive method of drug administration as well as localized delivery of anti-cancer drugs to tumor tissue. This article reviews various inhalable colloidal systems studied for tumor-targeted drug delivery including polymeric, lipid, hybrid and inorganic nanocarriers. The active targeting approaches for enhanced delivery of nanocarriers to lung cancer cells were illustrated...
November 24, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
John R Scott, Rohin Krishnan, Brian W Rotenberg, Leigh J Sowerby
BACKGROUND: Recalcitrant chronic rhinosinusitis without polyposis (CRSsP) is a challenging condition to manage as traditional medical therapies and surgery fail to provide satisfactory clinical improvements. Colloidal silver (CS), a widely used naturopathic agent, has recently shown anti-biofilm properties both in vitro and within a rhinosinusitis animal model. To date, no trials involving humans have been published in world literature. The purpose of this study was to assess the efficacy of CS as a topical nasal spray in patients with refractory CRSsP...
November 25, 2017: Journal of Otolaryngology—Head & Neck Surgery
Melissa D Smith, Michele Barletta, Courtni N Young, Erik H Hofmeister
OBJECTIVE: To determine the impact of intraoperative anesthetic variables on the length of hospitalization, cost of care and mortality in dogs. STUDY DESIGN: Retrospective, observational study. ANIMALS: A total of 235 dogs undergoing general anesthesia. METHODS: Medical records of dogs undergoing general anesthesia between 2007 and 2014 at the University of Georgia Veterinary Teaching Hospital were reviewed. Data collected included demographic data, American Society of Anesthesiologists (ASA) physical status, type and duration of anesthesia, hemodynamic variables, temperature, ventilation, fluid therapy and adjunctive drugs administered...
June 7, 2017: Veterinary Anaesthesia and Analgesia
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