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https://www.readbyqxmd.com/read/28445606/structural-and-biological-properties-of-thermosensitive-chitosan-graphene-hybrid-hydrogels-for-sustained-drug-delivery-applications
#1
Leyla Saeednia, Li Yao, Marcus Berndt, Kim Cluff, Ramazan Asmatulu
Chitosan has the ability to make injectable thermosensitive hydrogels which has been highly investigated for drug delivery applications. The addition of nanoparticles is one way to increase the mechanical strength of thermosensitive chitosan hydrogel and subsequently and control the burst release of drug. Graphene nanoparticles have shown unique mechanical, optical and electrical properties which can be exploited for biomedical applications, especially in drug delivery. This study, have focused on the mechanical properties of a thermosensitive and injectable hybrid chitosan hydrogel incorporated with graphene nanoparticles...
April 26, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28445363/indomethacin-enhances-fat-graft-retention-by-up-regulating-adipogenic-genes-and-reducing-inflammation
#2
Weiqing Zhan, Shaun S Tan, Xiaolian Han, Jason A Palmer, Geraldine M Mitchell, Wayne A Morrison
BACKGROUND: Cell-assisted lipotransfer has been promisingly applied to restore soft-tissue defects in plastic surgery; however, the harvesting of stromal vascular fraction increases morbidity and poses potential safety hazards. The authors investigated whether adding indomethacin, an antiinflammatory proadipogenic drug, to the fat graft at the time of transplantation would enhance the final graft volume compared with cell-assisted lipotransfer. METHODS: In vitro, human adipose-derived stem cells were cultured in conditioned growth media supplemented with various doses of indomethacin to investigate adipogenesis and the expression of the adipogenic genes...
May 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28444555/evaluating-the-effectiveness-of-a-novel-atomized-liquid-needle-free-transdermal-delivery-system
#3
Yi-Huei Huang, Chieh-Shen Hu, Yi-Jhen Ke, Chiao-Hsi Chiang, Po-Da Hong, Ming-Kung Yeh
Needle-free jet injections constitute a crucial method for drug delivery. A novel liquid drug delivery system has been proposed recently, in which pressure atomizes liquid before delivering that atomized liquid to the patient's body; however, the mechanism and efficiency of the system are unclear. This study explored the shot delivery pressure, penetration depth, and cumulative amount of permeation of this system. This system was used to deliver 0.5% (w/v) methylene blue to agarose phantoms at various shot delivery pressures...
April 25, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28444470/sexual-orientation-differences-in-health-and-wellbeing-among-women-living-with-hiv-in-canada-findings-from-a-national-cohort-study
#4
Carmen H Logie, Ashley Lacombe-Duncan, Ying Wang, Angela Kaida, Alexandra de Pokomandy, Kath Webster, Tracey Conway, Mona Loutfy
Sexual orientation differences in health and wellbeing among women living with HIV (WLH) are underexplored. Limited research available, however, suggests that sexual minority WLH may experience barriers to HIV care. Cross-sectional baseline data was analyzed from a Canadian cohort study with WLH (sexual minority women [SMW]: n = 180; heterosexual women: n = 1240). SMW (median age 38 years, IQR 13) included bisexual (58.9%), lesbian (17.8%) and other sexualities (23.3%). In multivariable analyses adjusting for age, poverty, education, and ethnicity, SMW identity was associated with increased odds of: clinical (80% vs...
April 25, 2017: AIDS and Behavior
https://www.readbyqxmd.com/read/28444321/evidence-of-altered-brain-responses-to-nicotine-in-an-animal-model-of-adhd
#5
Guillaume L Poirier, Wei Huang, Kelly Tam, Joseph R DiFranza, Jean A King
Introduction: Individuals with attention deficit/hyperactivity disorder (ADHD) are susceptible to earlier and more severe nicotine addiction. To shed light on the relationship between nicotine and ADHD, we examined nicotine's effects on functional brain networks in an animal model of ADHD. Methods: Awake magnetic resonance imaging was used to compare functional connectivity in adolescent (postnatal day 44±2) males of the Spontaneously Hypertensive Rat (SHR) strain and two control strains, Wistar Kyoto and Sprague Dawley (n = 16 each)...
April 22, 2017: Nicotine & Tobacco Research: Official Journal of the Society for Research on Nicotine and Tobacco
https://www.readbyqxmd.com/read/28444155/hospitalization-rates-among-people-with-hiv-aids-in-new-york-city-2013
#6
Rachael Lazar, Laura Kersanske, Qiang Xia, Demetre Daskalakis, Sarah L Braunstein
Background: Hospitalizations are an important indicator of health care quality and access for people with HIV/AIDS. This study assesses hospitalization rates among people with HIV/AIDS in New York City. Methods: We performed a deterministic match between people in the New York City HIV surveillance registry alive as of 1/1/2013 and diagnosed with HIV as of 12/31/2013 and patient-level inpatient hospitalization records during 2013. Event-level data were analyzed to determine characteristics of and reasons for hospitalizations...
April 24, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28443023/inhibition-of-vegf-and-angiopoietin-2-to-reduce-brain-metastases-of-breast-cancer-burden
#7
Kaci A Bohn, Chris E Adkins, Mohamed I Nounou, Paul R Lockman
For metastases in the central nervous system, angiogenesis enhances metastatic potential and promotes progression. Primary factors which drive vessel growth are vascular endothelial growth factor (VEGF) and angiopoietin-2. Preclinical models show inhibition of either factor reduces metastases spread and inhibits growth. This work sets out to answer two questions in a preclinical mouse model. First, whether the combined inhibition of VEGF and angiopoietin-2, reduces passive permeability and limits drug uptake into brain metastases; and second, whether this inhibition reduces metastases burden in brain...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28442954/evaluation-of-efficacy-of-dexmedetomidine-versus-propofol-for-sedation-in-children-undergoing-magnetic-resonance-imaging
#8
Kirti Kamal, Unnati Asthana, Teena Bansal, Jagdish Dureja, Geeta Ahlawat, Saloni Kapoor
BACKGROUND: A deep level of sedation is required for magnetic resonance imaging (MRI) in children to ensure optimum image quality. The present study was conducted to evaluate the efficacy and safety of dexmedetomidine versus propofol for sedation in children undergoing MRI. MATERIALS AND METHODS: A total of sixty children aged 2-10 years, having physical status 1 or 2 according to the American Society of Anesthesiologists, undergoing MRI were included in the study...
April 2017: Saudi Journal of Anaesthesia
https://www.readbyqxmd.com/read/28442581/sigma-receptor-effects-of-n-substituted-benztropine-analogs-implications-for-antagonism-of-cocaine-self-administration
#9
Takato Hiranita, Weimin C Hong, Theresa Kopajtic, Jonathan L Katz
Several N-substituted benztropine (BZT) analogs are atypical dopamine transport inhibitors as they have affinity for the dopamine transporter (DAT), but have minimal cocaine-like pharmacological effects and can block numerous effects of cocaine including its self-administration. Among these compounds, N-methyl (AHN1-055), N-allyl (AHN2-005), and N-butyl (JHW007) analogs of 3α-[bis(4'-fluorophenyl)methoxy]-tropane were more potent in antagonizing self-administration of cocaine and d-methamphetamine than in decreasing food-maintained responding...
April 25, 2017: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/28442368/differences-between-adolescents-and-adults-in-the-acute-effects-of-pcp-and-ketamine-and-in-sensitization-following-intermittent-administration
#10
Angelica Rocha, Nigel Hart, Keith Trujillo
Adolescence is a phase of development during which many physiological and behavioral changes occur, including increased novelty seeking and risk taking. In humans, this is reflected in experimentation with drugs. Research demonstrates that drug use that begins during adolescence is more likely to lead to addiction than drug use that begins later in life. Despite this, relatively little is known of the effects of drugs in adolescence, and differences in response between adolescents and adults. PCP and ketamine are popular club drugs, both possessing rewarding properties that could lead to escalating use...
April 22, 2017: Pharmacology, Biochemistry, and Behavior
https://www.readbyqxmd.com/read/28441954/electrochemotherapy-efficacy-evaluation-for-treatment-of-locally-advanced-stage-iii-cutaneous-squamous-cell-carcinoma-a-22-cases-retrospective-analysis
#11
Gianluca Di Monta, Corrado Caracò, Ester Simeone, Antonio Maria Grimaldi, Ugo Marone, Massimiliano Di Marzo, Vito Vanella, Lucia Festino, Marco Palla, Stefano Mori, Nicola Mozzillo, Paolo Antonio Ascierto
BACKGROUND: Extensive squamous cell carcinoma has few therapeutic options. In such cases, electrochemotherapy involving electroporation combined with antineoplastic drug appears to be a new potential option and may be considered as an alternative treatment. The aim of this retrospective single-center study was to evaluate electrochemotherapy efficacy in treatment of locally advanced stage III squamous cell carcinoma, in which surgical procedures would have entailed wide tissue sacrifice...
April 26, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28441076/a-novel-neuroprotective-small-molecule-for-glial-cell-derived-neurotrophic-factor-induction-and-photoreceptor-rescue
#12
Petr Baranov, Hong Lin, Kathryn McCabe, David Gale, Shenshen Cai, Burke Lieppman, Dwight Morrow, Phoebe Lei, Justin Liao, Michael Young
PURPOSE: Degenerative diseases of the retina, such as retinitis pigmentosa and age-related macular degeneration, are characterized by the irreversible loss of photoreceptors. Several growth factors, including glial cell derived neurotrophic factor (GDNF), have been shown to rescue retinal neurons. An alternative strategy to direct GDNF administration is its induction in host retina by small molecules. Here we studied the ability of a novel small molecule GSK812 to induce GDNF in vitro/in vivo and rescue photoreceptors...
April 25, 2017: Journal of Ocular Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28440810/naltrexone-modulates-dopamine-release-following-chronic-but-not-acute-amphetamine-administration-a-translational-study
#13
N Jayaram-Lindström, J Guterstam, J Häggkvist, M Ericson, T Malmlöf, B Schilström, C Halldin, S Cervenka, T Saijo, A-L Nordström, J Franck
The opioid antagonist naltrexone has been shown to attenuate the subjective effects of amphetamine. However, the mechanisms behind this modulatory effect are currently unknown. We hypothesized that naltrexone would diminish the striatal dopamine release induced by amphetamine, which is considered an important mechanism behind many of its stimulant properties. We used positron emission tomography and the dopamine D2-receptor radioligand [(11)C]raclopride in healthy subjects to study the dopaminergic effects of an amphetamine injection after pretreatment with naltrexone or placebo...
April 25, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/28440736/levistilide-a-inhibits-angiogenesis-in-liver-fibrosis-via-vascular-endothelial-growth-factor-signaling-pathway
#14
Zhi-Min Zhao, Hong-Liang Liu, Xin Sun, Tao Guo, Li Shen, Yan-Yan Tao, Cheng-Hai Liu
Levistilide A (C24H28O4, molecular weight = 380.48) derived from Angelica sinensis (Danggui) has been reported to inhibit hepatic stellate cell proliferation. This study investigated the effects of levistilide A on liver fibrosis relating to angiogenesis, particularly on the characteristic change in liver sinusoidal endothelial cells. LX-2 cells were activated by TGF-β1, and the human hepatic sinusoidal endothelial cells (HHSECs) were induced by endothelial cell growth supplement. Cell viability was detected using a methylthiazoldiphenyl-tetrazolium bromide assay; F-actin was visualized through the fluorescence probe method; cell proliferation was examined using the EdU kit; antiangiogenesis activity was assessed using the tube formation assay and transgenic zebrafish model...
May 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28440733/morphological-and-morphometric-analysis-of-the-effects-of-intralesional-tamoxifen-on-keloids
#15
Lauro R Soares-Lopes, Ione M Soares-Lopes, Lauro Ll Filho, Airlane P Alencar, Benedito B da Silva
The aim of this study was to evaluate the effect of intralesional tamoxifen on keloids, particularly on the concentration of fibroblasts, dermal inflammatory infiltrate, and collagen degeneration. A prospective study was carried out to evaluate keloids in 13 patients of both genders pre- and post-treatment with intralesional tamoxifen. Two samples of keloid lesions were obtained by 4-mm punch biopsies during the study: the first at the time of diagnostic confirmation of keloid and the other eight weeks later at the end of intralesional tamoxifen treatment...
May 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28440713/glycinated-fullerenes-for-tamoxifen-intracellular-delivery-with-improved-anticancer-activity-and-pharmacokinetics
#16
Charu Misra, Manish Kumar, Gajanand Sharma, Rajendra Kumar, Bhupinder Singh, Om Prakash Katare, Kaisar Raza
AIM: Glycine-tethered C60-fullerenes were conjugated with N-desmethyl tamoxifen and evaluated for drug delivery benefits. MATERIALS & METHODS: C60-fullerenes were functionalized with glycine, and N-desmethyl tamoxifen was conjugated, employing a linker and characterized for micromeritics, drug loading, drug release and evaluated for cancer cell toxicity, cellular uptake and pharmacokinetics. RESULTS: The nanoconjugate with a drug entrapment efficiency of 82...
April 25, 2017: Nanomedicine
https://www.readbyqxmd.com/read/28440691/n-butyl-2-cyanoacrylate-based-injectable-and-in-situ-forming-implants-for-efficient-intratumoral-chemotherapy
#17
Yanpu Wu, Luming Wang, Kaili Zhang, Lixiao Zhou, Xiaobing Zhang, Xuecheng Jiang, Chenggang Zhu
The local delivery of chemotherapeutic drugs to tumor sites is an effective approach for achieving therapeutic drug concentrations in solid tumors. Injectable implants with the ability to form in situ represent one of the most promising technologies for intratumoral chemotherapy. However, many issues must be resolved before these implants can be applied in clinical practice. Herein, we report a novel injectable in situ-forming implant system composed of n-butyl-2-cyanoacrylate (NBCA) and ethyl oleate, and the sol-gel phase transition is activated by anions in body fluids or blood...
November 2017: Drug Delivery
https://www.readbyqxmd.com/read/28440583/topical-antibiotics-and-intravitreal-injections
#18
REVIEW
Alex P Hunyor, Rohan Merani, Archie Darbar, Jean-François Korobelnik, Paolo Lanzetta, Annabelle A Okada
There is increasing evidence that topical antibiotics, given before and/or after intravitreal injections, are ineffective in preventing endophthalmitis and are possibly harmful. In addition to the lack of efficacy and increased development of resistant organisms, the use of topical antibiotics adds significantly to the cost of delivering intravitreal therapy. Despite this, in many countries, it is still common practice to use pre- and/or postinjection topical antibiotics. This review outlines the general principles of effective antibiotic prophylaxis, and the evidence regarding topical antibiotic use as a prophylactic measure for endophthalmitis following intravitreal injections...
April 25, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/28439465/single-exponential-decay-waveform-a-synergistic-combination-of-electroporation-and-electrolysis-e2-for-tissue-ablation
#19
Nina Klein, Enric Guenther, Paul Mikus, Michael K Stehling, Boris Rubinsky
BACKGROUND: Electrolytic ablation and electroporation based ablation are minimally invasive, non-thermal surgical technologies that employ electrical currents and electric fields to ablate undesirable cells in a volume of tissue. In this study, we explore the attributes of a new tissue ablation technology that simultaneously delivers a synergistic combination of electroporation and electrolysis (E2). METHOD: A new device that delivers a controlled dose of electroporation field and electrolysis currents in the form of a single exponential decay waveform (EDW) was applied to the pig liver, and the effect of various parameters on the extent of tissue ablation was examined with histology...
2017: PeerJ
https://www.readbyqxmd.com/read/28439156/diclofenac-transdermal-patch-a-potential-ingress-to-maxillofacial-surgery
#20
Anisha Perepa, Brig Ramen Sinha, Uday Kiran Uppada, Avss Subramanya Kumar
PURPOSE: To evaluate the analgesic efficacy of a diclofenac transdermal patch with diclofenac intra muscular injection in the immediate postoperative period in patients undergoing major oral surgical procedures. MATERIALS AND METHODS: Subjects who underwent bijaw surgeries for surgical correction of various dentofacial deformities were included. Sixty such patients who belonged to the above entity were randomly categorized into two groups from Jan 2012-Aug 2015...
June 2017: Journal of Maxillofacial and Oral Surgery
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