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https://www.readbyqxmd.com/read/29775714/novel-bletilla-striata-polysaccharide-microneedles-fabrication-characterization-and-in-vitro-transcutaneous-drug-delivery
#1
Lingli Hu, Zhencheng Liao, Qiqi Hu, Katherine G Maffucci, Yan Qu
Dissolving microneedles (MNs) have been widely studied for their applications in effective transdermal drug delivery due to their ability to dissolve within the skin. This study details the first reported successful preparation of novel dissolving MNs using Bletilla striata polysaccharide (BSP), a natural glucomannan material, and investigates the potential for using such MNs as a transdermal drug delivery vector. The prepared dissolving Bletilla striata polysaccharide microneedles (BMNs) had excellent moldability and were easily detached from the mold...
May 15, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29771146/nanosized-ethanol-based-malleable-liposomes-of-cytarabine-to-accentuate-transdermal-delivery-formulation-optimization-in-vitro-skin-permeation-and-in-vivo-bioavailability
#2
Rakesh Raj, Pooja Mongia Raj, Alpana Ram
Cytarabine is a pyrimidine nucleoside analog used predominantly for acute myeloid leukemia (AML) and also for other indications, including acute lymphocytic leukemia, chronic myelogenous leukemia, and lymphoma by parenteral route due to its low oral bioavailability. Parenteral administration requires constant plasma level, monitoring for its fluctuation and poor patients compliances. Hence the objective of this work is to construct optimized nanosized malleable liposomes of cytarabine to accentuate transdermal delivery of drug to circumvent previously mentioned drawbacks...
May 17, 2018: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/29761237/determining-the-effect-of-ph-on-the-partitioning-of-neutral-cationic-and-anionic-chemicals-to-artificial-sebum-new-physicochemical-insight-and-qspr-model
#3
Senpei Yang, Lingyi Li, Tao Chen, Lujia Han, Guoping Lian
PURPOSE: Sebum is an important shunt pathway for transdermal permeation and targeted delivery, but there have been limited studies on its permeation properties. Here we report a measurement and modelling study of solute partition to artificial sebum. METHODS: Equilibrium experiments were carried out for the sebum-water partition coefficients of 23 neutral, cationic and anionic compounds at different pH. RESULTS: Sebum-water partition coefficients not only depend on the hydrophobicity of the chemical but also on pH...
May 14, 2018: Pharmaceutical Research
https://www.readbyqxmd.com/read/29752796/transdermal-optical-renal-function-monitoring-in-humans-development-verification-and-validation-of-a-prototype-device
#4
Martin P Debreczeny, Richard B Dorshow
A prototype medical device for monitoring kidney function by transdermal measurement of the clearance rate of the exogenous fluorescent tracer agent MB-102 (administered intravenously) was developed. Verification of the device with an in vitro protocol is described. The expected renal clearance of the agent was mimicked by preparing a dilution series of MB-102 in the presence of a scattering agent. The slope of a linear fit to the logarithm of fluorescence intensity as a function of dilution step agreed with predictions within 5%, a level of accuracy that would be adequate in assessment of GFR to prevent misdiagnosis of kidney disease...
May 2018: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/29751143/characterization-and-cytotoxicity-evaluation-of-biocompatible-amino-acid-esters-used-to-convert-salicylic-acid-into-ionic-liquids
#5
Rahman Md Moshikur, Chowdhury Md Raihan, Rie Wakabayashi, Yoshiro Tahara, Muhammad Moniruzzaman, Masahiro Goto
The technological utility of active pharmaceutical ingredients (APIs) is greatly enhanced when they are transformed into ionic liquids (ILs). API-ILs have better solubility, thermal stability, and the efficacy in topical delivery than solid or crystalline drugs. However, toxicological issue of API-ILs is the main challenge for their application in drug delivery. To address this issue, 11 amino acid esters (AAEs) were synthesized and investigated as biocompatible counter cations for the poorly water-soluble drug salicylic acid (Sal) to form Sal-ILs...
May 8, 2018: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29747144/measurement-of-lidocaine-and-2-6-dimethylaniline-in-minipig-plasma-skin-and-dermal-tapes-using-uhplc-with-electrospray-ms-ms
#6
Qian Li, Tobias Magers, Brad King, Brian J Engel, Ray Bakhtiar, Charisse Green, Ronald Shoup
Sensitive LC-MS/MS methods were developed to measure lidocaine and its metabolite 2,6-dimethylaniline (2,6-DMA) with application to transdermal studies. The methods for lidocaine in minipig plasma, tissue biopsies, and dermal tapes utilized mixed mode/SCX solid phase extraction, with lower quantitation limits of 25 pg/mL in plasma, 15 ng/g tissue, and 5 ng/tape. 2,6-DMA was measured in plasma and skin tissue homogenates by ultrafiltration and (for tissue) by further derivatization with 4-methoxybenzoyl chloride to form the corresponding benzamide derivative, which extended the lower limit of quantitation to 200 pg/mL...
April 18, 2018: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29745701/a-multimodal-investigation-of-contextual-effects-on-alcohol-s-emotional-rewards
#7
Catharine E Fairbairn, Konrad Bresin, Dahyeon Kang, I Gary Rosen, Talia Ariss, Susan E Luczak, Nancy P Barnett, Nathaniel S Eckland
Regular alcohol consumption in unfamiliar social settings has been linked to problematic drinking. A large body of indirect evidence has accumulated to suggest that alcohol's rewarding emotional effects-both negative-mood relieving and positive-mood enhancing-will be magnified when alcohol is consumed within unfamiliar versus familiar social contexts. But empirical research has never directly examined links between contextual familiarity and alcohol reward. In the current study, we mobilized novel ambulatory technology to examine the effect of social familiarity on alcohol reward in everyday drinking contexts while also examining how alcohol reward observed in these field contexts corresponds to reward observed in the laboratory...
May 2018: Journal of Abnormal Psychology
https://www.readbyqxmd.com/read/29743519/transdermal-water-in-oil-nanocarriers-of-nitric-oxide-for-triggering-penile-erection
#8
Eunryel Nam, Saejong Yoo, Hwi-Yool Kim, Young-Rok Kim, Yun Jung Heo
Men's sexual health can have significant effects on a man's self-esteem, sexual relationship and male reproductive functions. Although commercially available drugs (e.g., VIAGRA and CIALIS) show effective treatment of erectile dysfunction (ED), patients with severe ED fail to respond to these medicines. Topical nitric-oxide (NO) delivery to penis can be a painless, alternative solution with severe ED because NO triggers erection and diffuses to the trabecular arteries and smooth muscles in the penis. We here develop water-in-oil (W/O) nanoemulsions (NEs) that contain NO and can directly spread on the penis...
May 9, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29742934/drug-information-association-pharmacovigilance-and-risk-management-strategies-2017-overview-of-the-generic-drug-program-and-surveillance
#9
Howard D Chazin, John R Peters, Debra M Catterson, James L Osterhout, Linda M Forsyth, Jung E Lee, Edward K Kim, Karen B Feibus
The US Food and Drug Administration's (FDA's) generic drug program has dramatically increased the availability of affordable, high quality generic drugs. The foundation of generic drug approvals is a two-tiered regulatory framework of pharmaceutical equivalence and bioequivalence. Intrinsic to both of these is consideration of the clinical relevance of formulation and bioequivalence data to support an inference of therapeutic equivalence, based on clear evidence that there are no significant differences between the generic drug and the brand name drug...
January 1, 2018: Therapeutic Innovation & Regulatory Science
https://www.readbyqxmd.com/read/29742786/-patient-controlled-analgesia-pca-an-overview-about-methods-handling-and-new-modalities
#10
Marie Abrolat, Leopold H J Eberhart, Gerald Kalmus, Tilo Koch, Stefan Nardi-Hiebl
Patient-controlled analgesia (PCA) is one of the well established methods for the treatment of postoperative pain. A cochrane-review concluded that PCA is associated with better postoperative pain ratings and improved patient-satifaction compared to traditional way of administering opioids. Some prerequisites concerning patient selection, education of the patient and the medical staff, and supervision during PCA therapy are mandatory for a safe use of PCA. Current PCA modalities (intravenous and epidural routes of application) are expanded by newer, less invasive routes of drug administration, e...
April 2018: Anästhesiologie, Intensivmedizin, Notfallmedizin, Schmerztherapie: AINS
https://www.readbyqxmd.com/read/29740759/characterization-and-in-vitro-permeation-study-of-cubic-liquid-crystal-containing-sinomenine-hydrochloride
#11
Xiaoqin Chu, Qian Li, Shuangying Gui, Zhengguang Li, Jiaojiao Cao, Jianqin Jiang
This study developed a new transdermal delivery system for the improved delivery of sinomenine hydrochloride (SH). The delivery system utilized the advantages of lyotropic liquid crystals (LLC) creating an adaptable system that offers a variety of options for the field of transdermal delivery. The formulation was prepared, characterized, and evaluated for its skin penetration in vitro. In the study, the appearance of samples was characterized by visual observation, and these LLC gels were colorless and transparent...
May 8, 2018: AAPS PharmSciTech
https://www.readbyqxmd.com/read/29738414/estrogen-alone-therapy-and-invasive-breast-cancer-incidence-by-dose-formulation-and-route-of-delivery-findings-from-the-whi-observational-study
#12
Chrisandra Shufelt, C Noel Bairey Merz, Mary B Pettinger, Lydia Choi, Rowan Chlebowski, Carolyn J Crandall, Simin Liu, Dorothy Lane, Ross Prentice, JoAnn E Manson
OBJECTIVE: Research on the relationships between different hormone therapy doses, formulation and routes of delivery, and subsequent breast cancer incidence has been limited. This study directly compared different estrogen doses, formulations, and route of delivery of estrogen alone among women with a hysterectomy in relation to invasive breast cancer incidence. METHODS: The Women's Health Initiative Observational Study is a large multicenter prospective cohort study conducted at 40 US sites...
May 7, 2018: Menopause: the Journal of the North American Menopause Society
https://www.readbyqxmd.com/read/29738412/slco1b1-genetic-variation-and-hormone-therapy-in-menopausal-women
#13
Ann M Moyer, Mariza de Andrade, Stephanie S Faubion, Ekta Kapoor, Tanda Dudenkov, Richard M Weinshilboum, Virginia M Miller
OBJECTIVE: Response to menopausal hormone therapy (MHT) shows individual variation. SLCO1B1 encodes the OATP1B1 transporter expressed in the liver that transports many endogenous substances, including estrone sulfate, from the blood into hepatocytes. This study evaluated the relationship between genetic variation in SLCO1B1 and response to MHT in women enrolled in the Kronos Early Estrogen Prevention Study (KEEPS) at Mayo Clinic, Rochester, MN. METHODS: KEEPS participants were randomized to oral conjugated equine estrogen (n = 33, oCEE), transdermal 17β-estradiol (n = 33, tE2), or placebo (n = 34) for 48 months...
May 7, 2018: Menopause: the Journal of the North American Menopause Society
https://www.readbyqxmd.com/read/29732968/reverse-iontophoretic-extraction-of-gabapentin-a-mechanistic-study
#14
Subhasis Chakrabarty, Bijaya Ghosh, Tapan Kumar Giri, Jasmina Khanam
The work was aimed at extracting gabapentin by transdermal reverse iontophoresis to check its feasibility for noninvasive therapeutic drug monitoring. Gabapentin was delivered in phosphate buffer (pH 7.4) at a therapeutic concentration range of 2-10 µg/ml. The same media was also used in receiver compartment. Extractions were carried out under an electric field of 5 V (current intensity range 0.3 mA/cm2-0.5 mA/cm2), provided by a custom-made power source for a period of 4 h. Samples were withdrawn at hourly intervals and drug content was analyzed by HPLC...
May 3, 2018: Current Drug Delivery
https://www.readbyqxmd.com/read/29731664/perioperative-analgesia-with-a-buprenorphine-transdermal-patch-for-hallux-valgus-surgery-a-prospective-randomized-controlled-study
#15
Can Xu, Mingqing Li, Chenggong Wang, Hui Li, Hua Liu
Purpose: Hallux valgus surgery often results in significant postoperative pain. Adequate control of pain is essential for patient satisfaction and improves the outcome of the procedure. This study aimed to investigate the perioperative analgesic effect of a buprenorphine transdermal patch in patients who underwent hallux valgus surgery. Patients and methods: A total of 90 patients were randomly divided into the following three groups based on the perioperative analgesic method: flurbiprofen axetil intravenous injection (Group F), oral celecoxib (Group C), and buprenorphine transdermal delivery system (BTDS) (Group BTDS)...
2018: Journal of Pain Research
https://www.readbyqxmd.com/read/29730442/towards-optimization-of-estrogen-receptor-modulation-in-medicine
#16
REVIEW
Marie-Cécile Valéra, Coralie Fontaine, Marion Dupuis, Emmanuelle Noirrit-Esclassan, Alexia Vinel, Maeva Guillaume, Pierre Gourdy, Françoise Lenfant, Jean-François Arnal
Women now spend more than one-third of their lives in the postmenopausal years, and the decline of endogenous estrogen production during menopause is accompanied by a series of functional disorders that affect the quality of life. These symptoms could be alleviated or even totally suppressed by menopausal hormone therapy (MHT), initially based on natural estrogens extracted from the urine of pregnant mares (mainly in the USA, using the oral route) and later from the synthesis of the natural estrogen, 17β-estradiol (mainly in Europe, in particular using the transdermal route)...
May 3, 2018: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/29729740/quantification-of-steroid-hormones-in-plasma-using-a-surrogate-calibrant-approach-and-uhplc-esi-qtof-ms-ms-with-swath-acquisition-combined-with-untargeted-profiling
#17
Bernhard Drotleff, Manfred Hallschmid, Michael Lämmerhofer
In spite of demonstrated lack of accuracy and consistency, quantification of steroid hormones is still most commonly executed via immunoassays. Mass spectrometric methods with triple quadrupole instruments are well established and, because of their proven robustness and sensitivity, best suited for targeted analysis. However, recent studies have shown that high-resolution mass spectrometers, like quadrupole time-of-flight instruments (QTOF), show comparable performance in terms of quantification and can generate additional sample information via untargeted profiling workflows...
August 31, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29725986/efficacy-and-safety-of-analgesic-treatment-for-depression-in-people-with-advanced-dementia-randomised-multicentre-double-blind-placebo-controlled-trial-dep-pain-dem
#18
Ane Erdal, Elisabeth Flo, Dag Aarsland, Clive Ballard, Dagrun D Slettebo, Bettina S Husebo
BACKGROUND: Chronic pain and depression often co-occur, and pain may exacerbate depression in people with dementia. OBJECTIVE: The objective of this study was to assess the efficacy and safety of analgesic treatment for depression in nursing home patients with advanced dementia and clinically significant depressive symptoms. METHODS: We conducted a multicentre, parallel-group, double-blind, placebo-controlled trial in 47 nursing homes, including 162 nursing home patients aged ≥ 60 years with dementia (Mini-Mental State Examination ≤ 20) and depression (Cornell Scale for Depression in Dementia ≥ 8)...
May 3, 2018: Drugs & Aging
https://www.readbyqxmd.com/read/29723614/the-effect-of-jet-speed-on-large-volume-jet-injection
#19
James W Mckeage, Bryan P Ruddy, Poul M F Nielsen, Andrew J Taberner
Jet injection presents a promising alternative to needle and syringe injection for transdermal drug delivery. The controllability of recently-developed jet injection devices now allows jet speed to be modulated during delivery, and has enabled efficient and accurate delivery of volumes up to 0.3 mL. However, recent attempts to inject larger volumes of up to 1 mL using the same methods have highlighted the different requirements for successful delivery at these larger volumes. This study aims to establish the jet speed requirements for delivery of 1 mL of liquid using a controllable, voice coil driven injection device...
April 30, 2018: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29722633/a-novel-transdermal-drug-delivery-patch-for-treating-local-muscular-pain
#20
Chandra S Sharma, Mudrika Khandelwal
No abstract text is available yet for this article.
May 1, 2018: Therapeutic Delivery
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