Abstract：
:Methicillin-resistant Staphylococcus aureus (MRSA) is an important cause of infections in humans. Photodynamic therapy using blue light (450 nm) could possibly be used to reduce MRSA on different human tissue surfaces without killing the human cells. It could be less harmful than 300-400 nm light or common disinfectants. We applied blue light ± riboflavin (RF) to MRSA and keratinocytes, in an in vitro liquid layer model, and compared the effect to elimination using common disinfection fluids. MRSA dilutions (8 × 105/mL) in wells were exposed to blue light (450 nm) ± RF at four separate doses (15, 30, 56, and 84 J/cm2). Treated samples were cultivated on blood agar plates and the colony forming units (CFU) determined. Adherent human cells were cultivated (1 × 104/mL) and treated in the same way. The cell activity was then measured by Cell Titer Blue assay after 24- and 48-h growth. The tested disinfectants were chlorhexidine and hydrogen peroxide. Blue light alone (84 J/cm2) eliminated 70% of MRSA. This dose and riboflavin eradicated 99-100% of MRSA. Keratinocytes were not affected by blue light alone at any dose. A dose of 30 J/cm2 in riboflavin solution inactivated keratinocytes completely. Disinfectants inactivated all cells. Blue light alone at 450 nm can eliminate MRSA without inactivation of human keratinocytes. Hence, a high dose of blue light could perhaps be used to treat bacterial infections without loss of human skin cells. Photodynamic therapy using riboflavin and blue light should be explored further as it may perhaps be possible to exploit in treatment of skin diseases associated with keratinocyte hyperproliferation.
journal_name
Lasers Med Scijournal_title
Lasers in medical scienceauthors
Makdoumi K,Hedin M,Bäckman Adoi
10.1007/s10103-019-02774-9subject
Has Abstractpub_date
2019-12-01 00:00:00pages
1799-1805issue
9eissn
0268-8921issn
1435-604Xpii
10.1007/s10103-019-02774-9journal_volume
34pub_type
杂志文章abstract：:There is concern that the delicate fibres and cylindrical diffuser tips used for intraluminal PDT of blood vessels might break during the treatment. We have developed and tested a simple system to monitor for fibre breakage during PDT. Light from the laser is passed through a beam expander, then a beam splitter, and t...
journal_title：Lasers in medical science
pub_type： 杂志文章
doi：10.1007/s10103-003-0270-x
更新日期：2003-01-01 00:00:00
abstract：:Antimicrobial photodynamic therapy (APDT) combined with endodontic treatment has been recognized as an alternative approach to complement conventional root canal disinfection methods on bacterial biofilms. We developed an in vitro model of bioluminescent Candida albicans biofilm inside curved dental root canals and i...
journal_title：Lasers in medical science
pub_type： 杂志文章
doi：10.1007/s10103-014-1629-x
更新日期：2015-08-01 00:00:00
abstract：:Protoporphyrin IX (PpIX) is the photosensitizer in 5-aminolaevulinic acid (ALA)-based photodynamic therapy (PDT). Its further bioconversion to heme requires iron and can be suppressed by iron chelators such as desferrioxamine (DFO). To investigate the effectiveness of DFO in enhancing PpIX-based PDT in skin tissue, we...
journal_title：Lasers in medical science
pub_type： 杂志文章
doi：10.1007/s10103-009-0721-0
更新日期：2010-03-01 00:00:00
abstract：:Diabetes mellitus (DM) is associated with musculoskeletal damage. Investigations have indicated that healing of the surgically tenotomized Achilles tendon was considerably augmented following low-level laser therapy (LLLT) in non-diabetic, healthy animals. The aim of the present study was to evaluate the effect of LLL...
journal_title：Lasers in medical science
pub_type： 杂志文章
doi：10.1007/s10103-012-1074-7
更新日期：2013-02-01 00:00:00
abstract：:For chronic rhinitis that is refractory to medical therapy, surgical intervention such as endoscopic vidian neurectomy (VN) can be used to control the intractable symptoms. Lasers can contribute to minimizing the invasiveness of ENT surgery. The aim of this retrospective study is to compare in patients who underwent d...
journal_title：Lasers in medical science
pub_type： 杂志文章
doi：10.1007/s10103-017-2330-7
更新日期：2017-12-01 00:00:00
abstract：:Osteoarthritis (OA) is a chronic joint disease that leads to pain and functional incapacity. The aim of the study is to investigate the effects of the incorporation of photobiomodulation (PBM) (via cluster) into a physical exercise program on the level of pain, lower limb muscle strength, and physical capacity, in pat...
journal_title：Lasers in medical science
pub_type： 杂志文章,随机对照试验
doi：10.1007/s10103-019-02807-3
更新日期：2020-02-01 00:00:00
abstract：:Previous in vivo and in vitro studies have reported that low-level diode laser therapy induces a biostimulatory effect, such as cell proliferation. The aim of the present study was to evaluate whether the laser irradiation of osteoblast-like cells (MG-63) can modify alkaline phosphatase activity (ALP), antigenic profi...
journal_title：Lasers in medical science
pub_type： 杂志文章
doi：10.1007/s10103-014-1557-9
更新日期：2014-07-01 00:00:00
abstract：:This study aimed to investigate the influence of low-power gallium-aluminium-arsenide (GaAlAs) laser [830 nm, continuous wave (CW), 40 mW and fluence 4 J/cm(2)] on the healing of surgically created bone defects in rats treated with bioactive glass graft material. Surgical bone defects were created in the mandibles of ...
journal_title：Lasers in medical science
pub_type： 杂志文章
doi：10.1007/s10103-008-0590-y
更新日期：2009-07-01 00:00:00
abstract：:In this study, shear bond strength (SBS) of metal orthodontic brackets to porcelain following conditioning by Er:YAG (erbium-doped yttrium aluminum garnet) and Nd:YAG (neodymium-doped yttrium aluminum garnet) laser in comparison to conventional methods was evaluated. One hundred glazed porcelain discs with an upper ce...
journal_title：Lasers in medical science
pub_type： 杂志文章
doi：10.1007/s10103-010-0878-6
更新日期：2012-03-01 00:00:00
abstract：:Crohn's disease is a chronic relapsing and remitting inflammatory condition which affects any part of the gastrointestinal tract. In the oro-facial region, patients can present peri-oral swellings which results in severe facial disfigurement. To date, assessing the degree of facial changes and evaluation of treatment ...
journal_title：Lasers in medical science
pub_type： 杂志文章
doi：10.1007/s10103-013-1286-5
更新日期：2014-05-01 00:00:00
abstract：:Different ablation techniques have been utilized in the treatment of Barrett's esophagus (BE) to reduce the risk of degeneration. Treatment complications, risk of recurrence, and buried intestinal metaplasia (IM) are all major concerns. The effect of diode laser treatment on BE, studied in a group of patients over a l...
journal_title：Lasers in medical science
pub_type： 杂志文章
doi：10.1007/s10103-010-0836-3
更新日期：2011-03-01 00:00:00
abstract：:The aim of the present study was to evaluate the success rate of failed implants re-implanted after surface treatment with CO2 laser. Despite the widespread use of dental implants, there are many incidents of failures. It is believed that lasers can be applied to decontaminate the implant surface without damaging the ...
journal_title：Lasers in medical science
pub_type： 杂志文章
doi：10.1007/s10103-016-1921-z
更新日期：2016-07-01 00:00:00
abstract：:To evaluate the efficacy of short-term subthreshold micropulse yellow laser photocoagulation (SMYLP) on eyes with diabetic macular edema (DME) with different central foveal thicknesses (CFT). Eighty eyes of 40 patients who had previously undergone ranibizumab treatment for DME and who subsequently had recurrent macula...
journal_title：Lasers in medical science
pub_type： 杂志文章
doi：10.1007/s10103-018-2672-9
更新日期：2019-07-01 00:00:00
abstract：:Delivery of intradermally focused nanosecond laser pulses with small energy as an alternate technique applicable to clinical procedures in dermatological and plastic surgery is an area of relatively new interest with multiple potential applications. We assessed this approach on common tattoo pigments in dermis in an i...
journal_title：Lasers in medical science
pub_type： 杂志文章
doi：10.1007/s101030200025
更新日期：2002-01-01 00:00:00
abstract：:Non-invasive skin-tightening devices can induce thermal denaturation and skin shrinkage via externally applied radiofrequency emissions or high-frequency ultrasound. Therefore, the purpose of this study is to develop and test a method for measurement of skin reduction associated with application of such energy devices...
journal_title：Lasers in medical science
pub_type： 杂志文章,随机对照试验
doi：10.1007/s10103-018-2646-y
更新日期：2019-06-01 00:00:00
abstract：:The aim of this study was to determine whether it is safe to use photo-activated disinfection (PAD) during root canal treatment without heating the periodontal tissues. Root canals of 30 freshly extracted single-rooted teeth were prepared using ProFiles up to size ISO 40 and then filled with photo-sensitiser: tolonium...
journal_title：Lasers in medical science
pub_type： 杂志文章
doi：10.1007/s10103-007-0526-y
更新日期：2009-01-01 00:00:00
abstract：:Outpatient laser ablation of palatine tonsils is a very interesting procedure that has been recently introduced as a routine in head and neck surgery departments. The aim of this study was to describe a new strategy using a Doppler-guided fibre optic neodymium-yttrium-aluminium-garnet (YAG) laser to remove up to 80 % ...
journal_title：Lasers in medical science
pub_type： 临床试验,杂志文章
doi：10.1007/s10103-012-1140-1
更新日期：2013-05-01 00:00:00
abstract：:The purpose of this study is to determine the effectiveness of endoscopic diode laser therapy in patients presenting rectal bleeding due to chronic radiation proctitis (CRP). A retrospective analysis of CRP patients who underwent diode laser therapy in a single institution between 2010 and 2016 was carried out. The pa...
journal_title：Lasers in medical science
pub_type： 杂志文章
doi：10.1007/s10103-017-2323-6
更新日期：2018-01-01 00:00:00
abstract：:Precise nerve localization is of major importance in both surgery and regional anesthesia. Optically based techniques can identify tissue through differences in optical properties, like absorption and scattering. The aim of this study was to evaluate the potential of optical spectroscopy (diffuse reflectance spectrosc...
journal_title：Lasers in medical science
pub_type： 杂志文章
doi：10.1007/s10103-017-2433-1
更新日期：2018-04-01 00:00:00
abstract：:Selecting the most representative site for biopsy is crucial in establishing a definitive diagnosis of oral epithelial dysplasia. The current process involves clinical examination that can be subjective and prone to sampling errors. The aim of this study was therefore to investigate the use of optical coherence tomogr...
journal_title：Lasers in medical science
pub_type： 杂志文章
doi：10.1007/s10103-011-0975-1
更新日期：2012-07-01 00:00:00
abstract：:Laser excision has been used with increasing success to treat oral leukoplakia. The aim of the present study was to evaluate whether clinical healing of a leukoplakia after laser surgery is associated with a normal functional status of the new epithelium and whether pathological alterations in these parameters are rel...
journal_title：Lasers in medical science
pub_type： 临床试验,杂志文章
doi：10.1007/s10103-011-0941-y
更新日期：2012-01-01 00:00:00
abstract：:Minimal hepatic encephalopathy (MHE) has been shown to affect daily functioning, quality of life, driving and overall mortality. However, little is known about treating or diagnosing early impairments involved in MHE. We studied one of its precipitating factors, portal hypertension. The purpose was to evaluate an enha...
journal_title：Lasers in medical science
pub_type： 杂志文章
doi：10.1007/s10103-016-2042-4
更新日期：2016-11-01 00:00:00
abstract：:We assess the long-term effect of pulsed high-intensity laser therapy (HILT) in the treatment of the post-mastectomy pain syndrome (PMPS). A total of 61 women participated in this study (30 in the laser group and 31 in the placebo laser group), with a mean age of 53.56 ± 1.11 years. Patients who were randomly assigned...
journal_title：Lasers in medical science
pub_type： 杂志文章,随机对照试验
doi：10.1007/s10103-015-1780-z
更新日期：2015-08-01 00:00:00
abstract：:Knee osteoarthritis (KOA) is a common degenerative disease in which several treatments and treatment associations have been investigated. This review analyzed the efficacy of the association of photobiomodulation therapy (PBMT) and exercises for people with KOA in randomized controlled clinical trials. PubMed, Scopus,...
journal_title：Lasers in medical science
pub_type： 杂志文章,评审
doi：10.1007/s10103-020-03223-8
更新日期：2021-01-03 00:00:00
abstract：:Although numerous papers have recently been published on ablative fractional resurfacing, there is a lack of information in literature on very long-term results. The aim of this retrospective study is to evaluate the efficacy, adverse side effects, and long-term results of a random fractional ultrapulsed CO2 laser on ...
journal_title：Lasers in medical science
pub_type： 临床试验,杂志文章
doi：10.1007/s10103-012-1116-1
更新日期：2013-02-01 00:00:00
abstract：:We report the results of endoscopic laser therapy on 59 patients with upper gastrointestinal vascular ectasia. After 300 sessions, complications were two nonbleeding and three bleeding ulcers, treated successfully with endoscopic therapy. After treatment, blood transfusions were abolished in 61% and reduced in 22% of ...
journal_title：Lasers in medical science
pub_type： 杂志文章
doi：10.1007/s10103-006-0389-7
更新日期：2006-09-01 00:00:00
abstract：:Low-level laser therapy (LLLT), widely used in physiotherapy, has been known to enhance wound healing and stimulate cell proliferation, including fibroblast and endothelial cells. Applying LLLT can increase cell proliferation in many kinds of cells including fibroblasts and endothelial cells. However, the protective m...
journal_title：Lasers in medical science
pub_type： 杂志文章
doi：10.1007/s10103-017-2364-x
更新日期：2018-02-01 00:00:00
abstract：:The Nd: YAG laser family offers wide possibilities for surgery applications in medicine. The radiation at 213 nm provides similar tissue effects as compared to 193 nm excimer lasers, but offers considerable practical advantages in the operating room. As such, it is of considerable interest to create single-mode Q-swit...
journal_title：Lasers in medical science
pub_type： 杂志文章
doi：10.1007/s10103-005-0328-z
更新日期：2005-01-01 00:00:00
abstract：:Laser angioplasty has been evaluated for coronary applications since the early 1980s. Early complications of dissection, perforation and thermal injury led to a loss of enthusiasm for this technique. Recent advances in catheter development, including optimally spaced laser fibres, athermic 308 nm wave-length catheters...
journal_title：Lasers in medical science
pub_type： 杂志文章
doi：10.1007/pl00011338
更新日期：2001-01-01 00:00:00
abstract：:A two-dimensional model including the effects of dynamic changes in the physical properties on tissue temperature and damage was developed to describe laser energy transport, heat transfer, and damage accumulation during laser-induced interstitial thermotherapy (LITT). The Monte Carlo method was used to simulate photo...
journal_title：Lasers in medical science
pub_type： 杂志文章
doi：10.1007/s10103-004-0324-8
更新日期：2005-01-01 00:00:00
