keyword
MENU ▼
Read by QxMD icon Read
search

microneedle

keyword
https://www.readbyqxmd.com/read/28812987/a-microneedle-functionalized-with-polyethyleneimine-and-nanotubes-for-highly-sensitive-label-free-quantification-of-dna
#1
Darius Saadat-Moghaddam, Jong-Hoon Kim
The accurate measure of DNA concentration is necessary for many DNA-based biological applications. However, the current methods are limited in terms of sensitivity, reproducibility, human error, and contamination. Here, we present a microneedle functionalized with polyethyleneimine (PEI) and single-walled carbon nanotubes (SWCNTs) for the highly sensitive quantification of DNA. The microneedle was fabricated using ultraviolet (UV) lithography and anisotropic etching, and then functionalized with PEI and SWCNTs through a dip coating process...
August 16, 2017: Sensors
https://www.readbyqxmd.com/read/28807013/microneedle-physical-contact-as-a-therapeutic-for-abnormal-scars
#2
David C Yeo, Elizabeth R Balmayor, Jan-Thorsten Schantz, Chenjie Xu
BACKGROUND: Abnormal (keloid and hypertrophic) scars are a significant affliction with no satisfactory single modality therapy to-date. Available options are often ineffective, painful, potentially hazardous, and require healthcare personnel involvement. Herein a self-administered microneedle device based on drug-free physical contact for inhibiting abnormal scars is reported. Its therapeutic activity through microneedle contact eliminates hazards associated with toxic anti-scarring drugs while self-treatment enables administration flexibility...
August 14, 2017: European Journal of Medical Research
https://www.readbyqxmd.com/read/28804994/neutron-activatable-needles-for-radionuclide-therapy-of-solid-tumors
#3
Junghyun Kim, Roger J Narayan, Xiuling Lu, Michael Jay
Various approaches have been undertaken to enhance the delivery of therapeutic agents, including tissue-killing radionuclides, into solid tumors. Here we describe the preparation of conical needles composed of Ti and Mo coated by pulsed laser deposition or chemical vapor deposition with elements (Ho and Re) that can readily yield radioactive isotopes following irradiation in a neutron flux. The radioactive needles, whose design were based on solid microneedle arrays used in transdermal drug delivery, can be produced with minimal handling of radioactivity and subsequently inserted into tumors as a means of internal radiation therapy...
August 14, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28796657/microneedling-a-review-and-practical-guide
#4
Tina S Alster, Paul M Graham
BACKGROUND: Microneedling is a relatively new treatment option in dermatology and has been touted for a broad range of applications including skin rejuvenation, acne scarring, rhytides, surgical scars, dyschromia, melasma, enlarged pores, and transdermal drug delivery. The significant increase in minimally invasive procedures that has been reported over the past several years suggest that microneedling may occupy a specific niche for patients who desire measurable clinical results from treatments with little to no recovery...
August 7, 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28782384/skin-microneedling-plus-platelet-rich-plasma-versus-skin-microneedling-alone-in-the-treatment-of-atrophic-post-acne-scars-a-split-face-comparative-study
#5
Mohamed Kotb, Shady Mahmoud Ibrahim
INTRODUCTION: Acne scarring is a permanent disfiguring sequel, which can take varied morphological forms. Many therapeutic measures have been performed to improve acne scarring such as microneedling. Our objective is to evaluate the efficacy and safety of microneedling alone versus microneedling in combined with platelet rich plasma in the treatment of post acne Methods: The study included 35 patients with mild to severe post acne atrophic scar. All the patients received four sequential treatments of skin microneedling alone on the right side of the face and skin microneedling followed by topical application of PRP on the left side of the face with an interval of 3 weeks...
August 7, 2017: Journal of Dermatological Treatment
https://www.readbyqxmd.com/read/28780461/nano-patterning-of-a-stainless-steel-microneedle-surface-to-improve-the-dip-coating-efficiency-of-a-dna-vaccine-and-its-immune-response
#6
Daeyoon Jung, N Sanoj Rejinold, Jeong-Eun Kwak, Su-Hyung Park, Yeu-Chun Kim
DNA vaccination with microneedles (MNs) into the skin represents a potential therapeutic approach for the clinical treatment of viral diseases as well as for intradermal genetic immunization. In this study, we investigated a DNA vaccination against the severe fever with thrombocytopenia syndrome virus (SFTSV) delivered by nano-patterned microneedles (nMNs) to improve the efficiency compared to a conventional MN vaccination. Because DNA vaccinations delivered by coated MNs have major disadvantages such as a poor coating efficiency and immunogenicity, additional excipients are necessary...
July 25, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28780407/microneedles-for-enhanced-transdermal-and-intraocular-drug-delivery
#7
REVIEW
Kurtis Moffatt, Yujing Wang, Thakur Raghu Raj Singh, Ryan F Donnelly
Microneedle mediated delivery based research has garnered great interest in recent years. In the past, the initial focus was delivery of macromolecules of biological origin, however the field has now broadened its scope to include transdermal delivery of conventional low molecular weight drug molecules. Great success has been demonstrated utilising this approach, particularly in the field of vaccine delivery. Current technological advances have permitted an enhancement in design formulation, allowing delivery of therapeutic doses of small molecule drugs and biomolecules, aided by larger patch sizes and scalable manufacture...
August 3, 2017: Current Opinion in Pharmacology
https://www.readbyqxmd.com/read/28780122/acceptability-of-microneedle-patch-vaccines-a-qualitative-analysis-of-the-opinions-of-parents
#8
S Marshall, A Fleming, A C Moore, L J Sahm
INTRODUCTION: Vaccines incorporated into microneedle-based patch platforms offer advantages over conventional hypodermic injections. However, the success and clinical utility of these platforms will depend on its acceptance among stakeholders. Minimal focus has been placed on determining parents' acceptability of microneedle-patch vaccines intended for paediatric use. This qualitative study probes the perceived acceptability of microneedle technology for paediatric vaccination in a parent population...
August 2, 2017: Vaccine
https://www.readbyqxmd.com/read/28776235/an-array-of-porous-microneedles-for-transdermal-monitoring-of-intercellular-swelling
#9
Kuniaki Nagamine, Jun Kubota, Hiroyuki Kai, Yoshinobu Ono, Matsuhiko Nishizawa
An array of porous microneedles was developed for minimally-invasive transdermal electrolytic connection through the human skin barrier, the stratum corneum. The length of microneedle was designed to be 100 μm so that it penetrates into the epidermis layer without pain. Each microneedle was supported by a thicker cylindrical post protruding from a planar substrate to realize its effective penetration even into elastic human skin. Since this support (post and substrate) was equally porous as the needles, the needle chip was entirely permeable for electrolyte...
September 2017: Biomedical Microdevices
https://www.readbyqxmd.com/read/28771982/original-article-platelet-rich-plasma-with-microneedling-in-androgenetic-alopecia-along-with-dermoscopic-pre-and-post-treatment-evaluation
#10
Abhijeet Kumar Jha, Uday Kumar Udayan, Prasoon Kumar Roy, Amar Kant Jha Amar, R K P Chaudhary
BACKGROUND: Platelet-rich plasma has shown beneficial effects in the treatment of androgenic alopecia with its growth factor properties in accelerating the dermal papilla. Dermoscopy is a noninvasive method that allows the in vivo evaluation of microstructures not visible to the naked eye. OBJECTIVE: To ascertain the role of platelet-rich plasma (PRP) with microneedling, and to compare the pre- and post-treatment dermoscopic features in androgenetic alopecia. (AGA)...
August 3, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/28771172/development-of-novel-faster-dissolving-microneedle-patches-for-transcutaneous-vaccine-delivery
#11
Akihiko Ono, Sayami Ito, Shun Sakagami, Hideo Asada, Mio Saito, Ying-Shu Quan, Fumio Kamiyama, Sachiko Hirobe, Naoki Okada
Microneedle (MN) patches are promising for transcutaneous vaccination because they enable vaccine antigens to physically penetrate the stratum corneum via low-invasive skin puncturing, and to be effectively delivered to antigen-presenting cells in the skin. In second-generation MN patches, the dissolving MNs release the loaded vaccine antigen into the skin. To shorten skin application time for clinical practice, this study aims to develop novel faster-dissolving MNs. We designed two types of MNs made from a single thickening agent, carboxymethylcellulose (CMC) or hyaluronan (HN)...
August 3, 2017: Pharmaceutics
https://www.readbyqxmd.com/read/28763230/skin-delivery-of-hydrophilic-biomacromolecules-using-marine-sponge-spicules
#12
Saiman Zhang, Huilong Ou, Chunyun Liu, Yuan Zhang, Samir Mitragotri, Dexiang Wang, Ming Chen
We report the development of sponge Haliclona sp. spicules, referred to as SHS, and its topical application in skin delivery of hydrophilic biomacromolecules, a series of Fluorescein isothiocyanate-Dextrans (FDs). SHS are silicious oxeas which are sharp-edged and rod-shaped (~120 μm in length and ~7 μm in diameter). SHS can physically disrupt skin in a dose-dependent manner and retain within the skin over at least 72 hours, which allows sustained skin penetration of hydrophilic biomacromolecules. The magnitude of enhancement of FD delivery into skin induced by SHS treatment was dependent on its molecular weight...
August 1, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28761259/a-comparative-study-of-microneedling-with-platelet-rich-plasma-plus-topical-minoxidil-5-and-topical-minoxidil-5-alone-in-androgenetic-alopecia
#13
Kaksha B Shah, Aarti N Shah, Rekha B Solanki, Ranjan C Raval
CONTEXT: There are very few studies evaluating efficacy of platelet-rich plasma (PRP) in hair restoration and its combination with microneedling. As far as ascertained, there is no study to evaluate efficacy of microneedling with PRP plus topical minoxidil (5%) versus topical minoxidil (5%) alone in androgenetic alopecia (AGA). AIMS: This study aims (1) to compare the efficacy of (a) topical minoxidil (5%) alone and (b) topical minoxidil (5%) + microneedling with PRP in men between 18 and 50 years with AGA Grade III to V vertex (Norwood-Hamilton scale) and (2) to perform objective and subjective evaluation based on clinical improvement and photographic evidence...
January 2017: International Journal of Trichology
https://www.readbyqxmd.com/read/28754611/transdermal-delivery-of-gentamicin-using-dissolving-microneedle-arrays-for-potential-treatment-of-neonatal-sepsis
#14
Patricia González-Vázquez, Eneko Larrañeta, Maelíosa T C McCrudden, Courtney Jarrahian, Annie Rein-Weston, Manjari Quintanar-Solares, Darin Zehrung, Helen McCarthy, Aaron J Courtenay, Ryan F Donnelly
Neonatal infections are a leading cause of childhood mortality in low-resource settings. World Health Organization guidelines for outpatient treatment of possible serious bacterial infection (PSBI) in neonates and young infants when referral for hospital treatment is not feasible include intramuscular gentamicin (GEN) and oral amoxicillin. GEN is supplied as an aqueous solution of gentamicin sulphate in vials or ampoules and requires health care workers to be trained in dose calculation or selection of an appropriate dose based on the patient's weight band and to have access to safe injection supplies and appropriate sharps disposal...
July 25, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28740383/enhanced-immunization-via-dissolving-microneedle-array-based-delivery-system-incorporating-subunit-vaccine-and-saponin-adjuvant
#15
Ji-Hui Zhao, Qi-Bo Zhang, Bao Liu, Xiang-Hua Piao, Yu-Lu Yan, Xiao-Ge Hu, Kuan Zhou, Yong-Tai Zhang, Nian-Ping Feng
PURPOSE: To enhance the immunogenicity of the model subunit vaccine, ovalbumin (OVA) was combined with platycodin (PD), a saponin adjuvant. To reduce the toxicity of PD, OVA, and adjuvant were loaded together into liposomes before being incorporated into a dissolving microneedle array. METHODS: OVA- and PD-loaded liposomes (OVA-PD-Lipos) were prepared using the film dispersion method. Their uptake behavior, toxicity to mouse bone marrow dendritic cells (BMDCs), and hemolytic activity to rabbit red blood cells (RBCs) were evaluated...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28738520/dissolving-microneedles-for-transdermal-drug-delivery-advances-and-challenges
#16
REVIEW
Kevin Ita
Over the last number of years, a significant body of evidence has shown the benefit of using dissolving microneedles (DMNs) for transdermal drug delivery. These devices are prepared from a wide range of materials such as sugars and polymers. DMNs are mainly fabricated by micromolding, photopolymerization, drawing lithography and droplet-airborne blowing. In this review, we have focused on the advances made in the field in recent years using a representative set of studies. Although the list of studies is not exhaustive, they highlight the challenges encountered such as the need to increase mechanical strength as well as medication dose while ensuring fast release of the active ingredient...
September 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28738417/a-pharmacodynamic-analysis-of-choroidal-neovascularization-in-a-porcine-model-using-three-targeted-drugs
#17
COMPARATIVE STUDY
Jeffrey Tran, Caroline Craven, Kathy Wabner, Jenn Schmit, Brock Matter, Uday Kompella, Hans E Grossniklaus, Timothy W Olsen
Purpose: To compare the efficacy of microneedle-delivered suprachoroidal (SC) pazopanib to intravitreal (Ivit) delivery of pazopanib, bevacizumab, or a fusion protein hI-con1 versus vehicle controls on choroidal neovascularization (CNV) growth in a pig model. Methods: Forty-one pigs were injected on the day of CNV induction (hI-con1 on postinduction day 14) with either 2.5 mg Ivit bevacizumab (n = 9), 1 mg Ivit pazopanib (n = 9), 300 Ivit μg hI-con1 (n = 4), or 1 mg SC pazopanib (n = 9), vs...
July 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28726212/melasma-an-up-to-date-comprehensive-review
#18
REVIEW
Oluwatobi A Ogbechie-Godec, Nada Elbuluk
Melasma is a common acquired condition of symmetric hyperpigmentation, typically occurring on the face, with higher prevalence in females and darker skin types. Multiple etiologies, including light exposure, hormonal influences, and family history, have been implicated in the pathogenesis of this disorder. Overall prevalence ranges widely at 1-50%, since values are typically calculated within a specific ethnic population within a geographic region. Histologically, melasma can display increased epidermal and/or dermal pigmentation, enlarged melanocytes, increased melanosomes, solar elastosis, dermal blood vessels, and, occasionally, perivascular lymphohistiocytic infiltrates...
July 19, 2017: Dermatology and Therapy
https://www.readbyqxmd.com/read/28720851/microneedle-patch-delivery-of-influenza-vaccine-during-pregnancy-enhances-maternal-immune-responses-promoting-survival-and-long-lasting-passive-immunity-to-offspring
#19
E Stein Esser, Joanna A Pulit-Penaloza, Haripriya Kalluri, Devin McAllister, Elena V Vassilieva, Elizabeth Q Littauer, Nadia Lelutiu, Mark R Prausnitz, Richard W Compans, Ioanna Skountzou
Influenza virus causes life-threatening infections in pregnant women and their newborns. Immunization during pregnancy is the most effective means of preventing maternal and infant mortality/morbidity; however, influenza vaccination rates of pregnant women remain under 50%. Furthermore, the availability of vaccines in low-resource populations is limited. Skin immunization with microneedle patches (MN) is a novel and safe vaccination platform featuring thermostable vaccine formulations. Cold-chain independence and the potential for self-administration can expand influenza vaccination coverage in developing countries...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28718050/dissolving-microneedle-patches-for-dermal-vaccination
#20
REVIEW
M Leone, J Mönkäre, J A Bouwstra, G Kersten
The dermal route is an attractive route for vaccine delivery due to the easy skin accessibility and a dense network of immune cells in the skin. The development of microneedles is crucial to take advantage of the skin immunization and simultaneously to overcome problems related to vaccination by conventional needles (e.g. pain, needle-stick injuries or needle re-use). This review focuses on dissolving microneedles that after penetration into the skin dissolve releasing the encapsulated antigen. The microneedle patch fabrication techniques and their challenges are discussed as well as the microneedle characterization methods and antigen stability aspects...
July 17, 2017: Pharmaceutical Research
keyword
keyword
96608
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"