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Low level light therapy

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https://www.readbyqxmd.com/read/28812164/efficacy-of-fractional-lasers-in-treating-alopecia-a-literature-review
#1
Marina Perper, Adam S Aldahan, Rachel A Fayne, Christopher P Emerson, Keyvan Nouri
Hair loss stemming from different types of alopecia, such as androgenic alopecia and alopecia areata, negatively affects over half the population and, in many circumstances, causes serious psychosocial distress. Current treatment options for alopecia, such as minoxidil, anthralin, and intralesional corticosteroids, vary efficacy and side effect profiles. It is known that low-level laser/light therapies (LLLT), or photobiomodulations, such as the US FDA-cleared HairMax Lasercomb®, He-Ne laser, and excimer laser, are relatively affordable, user-friendly, safe, and effective forms of treatment for hair loss...
August 16, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28783253/dual-stage-light-amplified-photodynamic-therapy-against-hypoxic-tumor-based-on-an-o2-self-sufficient-nanoplatform
#2
Li-Han Liu, Yao-Hui Zhang, Wen-Xiu Qiu, Lu Zhang, Fan Gao, Bin Li, Lu Xu, Jin-Xian Fan, Zi-Hao Li, Xian-Zheng Zhang
Tumor hypoxia severely limits the efficacy of traditional photodynamic therapy (PDT). Here, a liposome-based nanoparticle (designated as LipoMB/CaO2 ) with O2 self-sufficient property for dual-stage light-driven PDT is demonstrated to address this problem. Through a short time irradiation, (1) O2 activated by the photosensitizer methylene blue (MB) can induce lipid peroxidation to break the liposome, and enlarge the contact area of CaO2 with H2 O, resulting in accelerated O2 production. Accelerated O2 level further regulates hypoxic tumor microenvironment and in turn improves (1) O2 generation by MB under another long time irradiation...
August 7, 2017: Small
https://www.readbyqxmd.com/read/28776111/methylene-blue-mediated-photobiomodulation-on-human-osteoblast-cells
#3
Gamze Bölükbaşı Ateş, Ayşe Ak, Bora Garipcan, Murat Gülsoy
Photobiomodulation (PBM) and photodynamic therapy (PDT) are two major methods, which use light in medicine and dentistry. PBM uses low-level laser light to induce cell proliferation and activity. In contrast, PDT use laser light combined with a photosensitizer (PS) to cause cell death. Due to similar, not fully understood mechanisms and biphasic response of light, unexpected and complex outcomes may be observed. In the present study, the effect of 635 nm laser light, with power density 50 mW/cm(2), at three different energy densities (0...
August 4, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28752704/-preparation-characterization-and-cytology-study-of-pluronic-pei-micelles
#4
Wang Hebin, L I Yang, Liu Xingang, Zhou Jun, Wang Qingqing, Tang Guping
Objective: To prepare and characterize Pluronic-PEI micelles as a drug/gene delivery system. Methods: We used the low-molecular-weight PEI as a cross-linking agent to prepare the Pluronic-PEI micelles. The particle size, zeta potential and critical micelle concentration (CMC) were measured by dynamic light scattering (DLS) and pyrene fluorescence probe. The cytotoxicity, transfection efficiency and the impact on the intracellular ATP and P-gp levels of Pluronic-PEI micelles were investigated at the cellular level...
March 25, 2017: Zhejiang da Xue Xue Bao. Yi Xue Ban, Journal of Zhejiang University. Medical Sciences
https://www.readbyqxmd.com/read/28748217/mechanisms-and-applications-of-the-anti-inflammatory-effects-of-photobiomodulation
#5
Michael R Hamblin
Photobiomodulation (PBM) also known as low-level level laser therapy is the use of red and near-infrared light to stimulate healing, relieve pain, and reduce inflammation. The primary chromophores have been identified as cytochrome c oxidase in mitochondria, and calcium ion channels (possibly mediated by light absorption by opsins). Secondary effects of photon absorption include increases in ATP, a brief burst of reactive oxygen species, an increase in nitric oxide, and modulation of calcium levels. Tertiary effects include activation of a wide range of transcription factors leading to improved cell survival, increased proliferation and migration, and new protein synthesis...
2017: AIMS Biophysics
https://www.readbyqxmd.com/read/28741866/a-review-of-available-laser-and-intense-light-source-home-devices-a-dermatologist-s-perspective
#6
REVIEW
Margit Lw Juhász, Melissa K Levin, Ellen S Marmur
BACKGROUND: Home optical devices are becoming an increasingly popular treatment modality sought out by patients for dermatologic pathologies such as acne, hair removal and anti-aging, as these devices are a low-cost and convenient therapy choice. METHODS: An Internet search using PubMed.gov was completed with search terms, "home device dermatology," "home device acne," "home device hair" or "hair removal," and "home device aging." RESULTS: Currently, there are multiple home optical devices available on the market...
July 25, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/28739168/adipose-derived-stem-cell-spheroid-treated-with-low-level-light-irradiation-accelerates-spontaneous-angiogenesis-in-mouse-model-of-hindlimb-ischemia
#7
In-Su Park, Phil-Sang Chung, Jin Chul Ahn
BACKGROUND AIMS: We investigated whether low-level light irradiation (LLLI) before adipose-derived stromal cells (ASCs) spheroid transplantation improved hind-limb functional recovery by stimulation of angiogenesis. METHODS: The spheroid, composed of ASCs, was irradiated with low-level light and expressed angiogenic factors, including vascular endothelial growth factor and basic fibroblast growth factor. From immunochemical staining analysis, the spheroid of ASCs included CD31(+), KDR(+) and CD34(+), whereas monolayer-cultured ASCs were negative for these markers...
July 21, 2017: Cytotherapy
https://www.readbyqxmd.com/read/28703220/tumour-induced-osteomalacia
#8
REVIEW
Salvatore Minisola, Munro Peacock, Seijii Fukumoto, Cristiana Cipriani, Jessica Pepe, Sri Harsha Tella, Michael T Collins
Tumour-induced osteomalacia (TIO), also known as oncogenic osteomalacia, is a rare paraneoplastic disorder caused by tumours that secrete fibroblast growth factor 23 (FGF23). Owing to the role of FGF23 in renal phosphate handling and vitamin D synthesis, TIO is characterized by decreased renal tubular reabsorption of phosphate, by hypophosphataemia and by low levels of active vitamin D. Chronic hypophosphataemia ultimately results in osteomalacia (that is, inadequate bone mineralization). The diagnosis of TIO is usually suspected when serum phosphate levels are chronically low in the setting of bone pain, fragility fractures and muscle weakness...
July 13, 2017: Nature Reviews. Disease Primers
https://www.readbyqxmd.com/read/28702985/photobiomodulation-with-polarized-light-in-the-treatment-of-cutaneous-and-mucosal-ulcerative-lesions
#9
S E Aragona, F R Grassi, G Nardi, J Lotti, G Mereghetti, E Canavesi, E Equizi, A M Puccio, G Gianazza, T Lotti, I Morisi
In recent decades, regenerative medicine has achieved an important evolution at both a conceptual level and scientific production, which explains the current and future possibilities of therapy and daily clinical practice. The main aim of regenerative medicine is the complex system of repair/regeneration. The current literature on the subject demonstrates the advantage of visible light therapy for skin injuries and diseases with the photobiomodulation in which light at low energy levels modulates intra- and extra-cellular photoreceptors by molecular and cellular processes that can stimulate both anti-inflammatory mechanisms and cell proliferative response...
July 13, 2017: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/28700406/the-use-of-multistate-models-to-examine-associations-of-stress-and-adherence-with-transitions-among-hiv-care-states-observed-in-a-clinical-hiv-cohort
#10
Sandra Blitz, Tony Antoniou, Ann Burchell, Sharon Walmsley, Lucia Light, Sandra Gardner, Sean Rourke, Curtis Cooper, Claire Kendall, Mona Loutfy, Anita Rachlis, Wendy Wobeser, Anita Benoit, Janet Raboud
BACKGROUND: The "cascade of care" is a framework for quantifying the trajectory of people with HIV along the continuum of HIV care. We extended this framework to recognize that individuals may transition back and forth between states of care and to identify factors associated with movement among states of care over time, with particular focus on stress, depression and adherence. METHODS: The Ontario HIV Treatment Network Cohort Study is a multisite HIV clinical cohort...
July 3, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/28690083/analgesic-effects-of-preinjection-low-level-laser-light-therapy-lllt-before-third-molar-surgery-a-double-blind-randomized-controlled-trial
#11
Jacco G C Tuk, Arjen J van Wijk, Ine C Mertens, Zühal Keleş, Jérôme A H Lindeboom, Dan M J Milstein
OBJECTIVE: The aim of this study was to evaluate the analgesic effects of low-level laser therapy (LLLT) on preinjection sites in patients scheduled for third molar removal. STUDY DESIGN: This double-blind randomized controlled trial included 163 healthy patients undergoing third molar extractions. The study participants were randomly divided into an LLLT and a placebo group. Objective and subjective data sets were obtained from physiologic feedback (heart rate and sweat response) and a questionnaire, respectively...
May 4, 2017: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/28689965/ph-and-nir-light-responsive-magnetic-iron-oxide-nanoparticles-for-mitochondria-mediated-apoptotic-cell-death-induced-by-chemo-photothermal-therapy
#12
Yunok Oh, Jae-Young Je, Madhappan Santha Moorthy, Hansoo Seo, Won Ho Cho
Recently, various therapeutic strategies in anticancer drug development are focused to reduce adverse side effects and to enhance the therapeutic efficacy. Mostly, the iron oxide (Fe3O4) nanoparticles have widely been utilized as an efficient drug delivery system towing to their unique properties such as excellent magnetic behavior, considerably low toxicity, easy surface modification and high drug-loading efficacy. In the present study, we synthesized a multifunctional, DMSA coated, water soluble Fe3O4 nanoparticles (Fe3O4@DMSA/DOX) for an effective pH and NIR-light triggered delivery of anticancer drug (DOX) in cancer therapy...
July 6, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28680642/long-lasting-response-to-oral-therapy-in-a-young-male-with-monogenic-diabetes-as-part-of-hnf1b-related-disease
#13
Elena Carrillo, Amparo Lomas, Pedro J Pinés, Cristina Lamas
Mutations in hepatocyte nuclear factor 1β gene (HNF1B) are responsible for a multisystemic syndrome where monogenic diabetes (classically known as MODY 5) and renal anomalies, mostly cysts, are the most characteristic findings. Urogenital malformations, altered liver function tests, hypomagnesemia or hyperuricemia and gout are also part of the syndrome. Diabetes in these patients usually requires early insulinization. We present the case of a young non-obese male patient with a personal history of renal multicystic dysplasia and a debut of diabetes during adolescence with simple hyperglycemia, negative pancreatic autoimmunity and detectable C-peptide levels...
2017: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/28675492/development-of-patient-controlled-respiratory-gating-system-based-on-visual-guidance-for-magnetic-resonance-image-guided-radiation-therapy
#14
Jung-In Kim, Hanyoung Lee, Hong-Gyun Wu, Eui Kyu Chie, Hyun-Cheol Kang, Jong Min Park
PURPOSE: The aim of this study is to develop a visual guidance patient-controlled (VG-PC) respiratory gating system for respiratory-gated magnetic-resonance image-guided radiation therapy (MR-IGRT) and to evaluate the performance of the developed system. METHODS: The near-real-time cine planar MR image of a patient acquired during treatment was transmitted to a beam projector in the treatment room through an optical fiber cable. The beam projector projected the cine MR images inside the bore of the ViewRay system in order to be visible to a patient during treatment...
July 4, 2017: Medical Physics
https://www.readbyqxmd.com/read/28671718/antinociceptive-effects-of-low-level-laser-therapy-at-3-and-8%C3%A2-j-cm-2-in-a-rat-model-of-postoperative-pain-possible-role-of-endogenous-opioids
#15
Fabio C Pereira, Julia R Parisi, Caio B Maglioni, Gabriel B Machado, Paulino Barragán-Iglesias, Josie R T Silva, Marcelo L Silva
Low-level laser therapy (LLLT) is the direct application of light to stimulate cell responses (photobiomodulation) to promote tissue healing, reduce inflammation, and induce analgesia; the molecular basis for these effects of LLLT remains unclear. The objective of this study was to evaluate the analgesic effect of LLLT in the rat plantar incision model of postoperative pain as well as to investigate some of the possible mechanisms involved in this effect. Wistar rats were submitted to plantar incision and treated with LLLT (830 nm, continuous-mode, 30 mW/cm(2) , 1-12 J/cm(2) )...
July 3, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28668609/near-infrared-assisted-fenton-reaction-for-tumor-specific-and-mitochondrial-dna-targeted-photochemotherapy
#16
Ping Hu, Tong Wu, Wenpei Fan, Lei Chen, Yanyan Liu, Dalong Ni, Wenbo Bu, Jianlin Shi
The strong dependence on oxygen level, low ultraviolet/visible (UV/vis) light penetration depth and the extremely short lifetime of reactive oxygen species (ROS) are the major challenges of photodynamic therapy (PDT) for tumors. Fenton reaction can produce abundant ROS such as reactive hydroxyl radicals (OH) with significantly higher oxidation performance than singlet oxygen ((1)O2), which, however, has been rarely used in biomedical fields due to strict reaction conditions (favorably in pH range of 3-4, mostly under UV/vis light catalysis)...
June 23, 2017: Biomaterials
https://www.readbyqxmd.com/read/28653884/photobiomodulation-of-breast-and-cervical-cancer-stem-cells-using-low-intensity-laser-irradiation
#17
N E Kiro, M R Hamblin, H Abrahamse
Breast and cervical cancers are dangerous threats with regard to the health of women. The two malignancies have reached the highest record in terms of cancer-related deaths among women worldwide. Despite the use of novel strategies with the aim to treat and cure advanced stages of cancer, post-therapeutic relapse believed to be caused by cancer stem cells is one of the challenges encountered during tumor therapy. Therefore, further attention should be paid to cancer stem cells when developing novel anti-tumor therapeutic approaches...
June 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28650490/hypoxia-induced-tumor-cell-resistance-is-overcome-by-synergistic-gapdh-sirna-and-chemotherapy-co-delivered-by-long-circulating-and-cationic-interior-liposomes
#18
Jibin Guan, Jin Sun, Feilong Sun, Bo Lou, Dong Zhang, Vida Mashayekhi, Negar Sadeghi, Gert Storm, Enrico Mastrobattista, Zhonggui He
Chemotherapeutic drug resistance of tumor cells under hypoxic conditions is caused by the inhibition of apoptosis by autophagy and drug efflux via adenosine triphosphate (ATP)-dependent transporter activation, among other factors. Here, we demonstrate that disrupting glyceraldehyde-3-phosphate dehydrogenase (GAPDH) expression can reduce the autophagy and ATP levels in tumor cells. To test whether GAPDH knockdown is sufficient to overcome drug resistance, a nanocarrier (asymmetry-membrane liposome) was designed to encapsulate GAPDH-siRNA with a low dose of paclitaxel (PTX)...
July 6, 2017: Nanoscale
https://www.readbyqxmd.com/read/28621288/photodvnamic-therapy-in-endodontics
#19
Zahed Mohammadi, Hamid Jafarzadeh, Sousan Shalavi, Jun-Ichiro Kinoshita
Commonly used irrigants do not always eradicate the entire microbial flora in infected root canals. Therefore, several other strategies, such as photodynamic therapy (PDT) have been developed. Photoactivated disinfection is based on the interaction of a photosensitive antibacterial agent and a light source. It uses a nontoxic dye named photosensitizer (PS) and low-intensity visible light. In oxygen presentation, these combine to produce some cytotoxic species. The PS molecules attach to bacteria membrane. Irradiation with a specific wavelength of the light may lead to the production of singlet oxygen, resulting in rupture of the microbial cell wall...
June 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28616040/stem-cell-transplantation-for-spinal-cord-injury-a-meta-analysis-of-treatment-effectiveness-and-safety
#20
Xiao Fan, Jin-Zhao Wang, Xiao-Min Lin, Li Zhang
OBJECTIVE: The aim of this study was to evaluate the effectiveness and safety of stem cell transplantation for spinal cord injury (SCI). DATA SOURCES: PubMed, EMBASE, Cochrane, China National Knowledge Infrastructure, China Science and Technology Journal, Wanfang, and SinoMed databases were systematically searched by computer to select clinical randomized controlled trials using stem cell transplantation to treat SCI, published between each database initiation and July 2016...
May 2017: Neural Regeneration Research
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