Protective effect of low-level laser irradiation on lipopolysaccharide-mediated inflammatory injury of human periodontal ligament fibroblasts / 华西口腔医学杂志

OBJECTIVES@#To study the effect and mechanism of low-level laser irradiation (LLLI) on lipopolysaccharide (LPS)-induced inflammatory injury of human periodontal ligament fibroblasts (hPDLFs).@*METHODS@#hPDLFs were inoculated into well plates and randomly divided into the normal group, LPS group, and LPS+LLLI group. The cells in the normal group were cultured in conventional medium. The hPDLFs in the LPS and LPS+LLLI groups were cultured in RPMI1640 medium containing 1 mg·L@*RESULTS@#Compared with the normal group, the LPS group showed increased apoptosis rate of hPDLFs and intracellular free Ca@*CONCLUSIONS@#LLLI has a protective effect on the inflammatory injury of hPDLFs induced by LPS, and the effect is most obvious when the irradiation intensity is 4 J·cm

mILIB: a new concept in laser therapy / mILIB: un nuevo concepto en laserterapia

mILIB (Intravascular Laser Irradiation in the Modified Bloodstream) presents itself as one more photobiomodulation technique, among the many therapeutic possibilities we know. The advantage in this case is the possibility of making application in a systemic way in which the organism as a whole is benefited. The use of the red therapeutic laser in a transcutaneous way, has been a great option as an added therapeutic value to the treatment of several pathologies, providing systemic stimuli, similar to hemotherapy. Thus, mILIB presents itself as an effective and increasingly widespread technique for professionals working with photobiomodulation

mILIB (Irradiación láser intravascular en el torrente sanguíneo modificado) se presenta como una técnica de fotobiomodulación más, entre las muchas posibilidades terapéuticas que conocemos. La ventaja en este caso es la posibilidad de realizar una aplicación de forma sistémica en la que se beneficia al organismo en su conjunto.El uso del láser terapéutico rojo de forma transcutánea, ha sido una gran opción como valor terapéutico añadido al tratamiento. de varias patologías, proporcionando estímulos sistémicos, similar a la hemoterapia. Así, mILIB se presenta como una técnica eficaz y cada vez más extendida para los profesionales que trabajan con fotobiomodulación.

Efeito do laser de baixa intensidade na atividade biológica de células-tronco do ligamento periodontal humano cultivadas sobre arcabouços de quitosana / Effect of low-intensity laser on the biological activity of human periodontal ligament stem cells cultured on chitosan scaffolds

O laser de baixa intensidade (LBI) é capaz de estimular a proliferação de diferentes tipos celulares, porém pouco se sabe sobre sua eficácia na proliferação de células cultivadas na superfície dos biomateriais. O objetivo deste estudo foi avaliar a influência do LBI na proliferação e viabilidade de células-tronco do ligamento periodontal humano (PDLSCs) cultivadas em arcabouços de quitosana. A quitosana foi submetida a testes para identificação do teor real de massa e grau de desacetilação. Membranas de quitosana foram preparadas pela técnica de evaporação de solvente e submetidas a caracterização de morfologia e de superfície. PDLSCs previamente isoladas e caracterizadas foram cultivadas sobre quatro superfícies: (P) plástico da placa de cultivo, não irradiado, como controle positivo de crescimento celular; (Q) quitosana, não irradiado; (L1) quitosana, irradiado com dose de 1 J/cm²; e (L4) quitosana, irradiado com 4 J/cm². As irradiações foram realizadas com laser diodo InGaAlP, com comprimento de onda de 660 nm, potência de 30 Mw, diâmetro da ponta de 0.01cm² e modo de ação contínuo, em dose única. Os dados mostraram que a quitosana apresentou um teor real de massa de 88,08% e grau de desacetilação de 91,37±3,77%. A análise das membranas por MEV mostrou superfície uniforme e homogênea, com espessura média de 68,71 µm. A análise por microscopia de força atômica revelou uma rugosidade média de 285 nm. O peso das membranas variou de 0,03 a 0,04 g, indicando a sua uniformidade, e o pH de superfície exibiu média de 6,9±0,25, valor próximo ao pH da saliva. A viabilidade e a proliferação celular foram avaliadas através dos ensaios de Alamar Blue, Live/Dead, Annexin V/PI e Ki67, além da análise do ciclo celular, e a morfologia celular foi avaliada por microscopia eletrônica de varredura (MEV). O ensaio do Alamar Blue mostrou diferenças significativas na atividade mitocondrial entre os grupos nos intervalos de 24 h (L1>Q, p= 0,0118) e em 48 h (L1>Q, p= 0,0022; L4>Q, p=0,0002; L4>L1, p= 0,0022). O ensaio Live/Dead mostrou maior densidade de células vivas nos grupos irradiados (L1 e L4) em relação ao grupo sem irradiação (Q), o que foi comprovado pelo ensaio da Annexin V/PI, que mostrou um maior percentual de células viáveis em L4 (89,5%) e L1 (87,0%) em comparação com Q (78,4%) em 72 h. A imunoexpressão da proteína Ki67 foi maior em L4 e L1 e estes dois grupos apresentaram também um maior percentual de células nas fases proliferativas do ciclo celular (S e G2/M). A análise por MEV mostrou no grupo Q células com morfologia mais arredondada e com poucas projeções, além de debris celulares, enquanto nos grupos irradiados as células exibiram um arranjo mais plano, com projeções mais distribuídas e pontos de adesão focal, especialmente em L4. Em conjunto, os resultados do presente trabalho permitem concluir que a laserterapia nos padrões estudados, especialmente na dose de 4 J/cm², influencia positivamente a viabilidade e a proliferação de PDLSCs em membranas de quitosana, permitindo assim que as células superem eventuais efeitos adversos do microambiente do arcabouço (AU).

Low-level laser irradiation (LLLI) is able to stimulate the proliferation of various cell types, but little is known about its effectiveness on the proliferation of cells cultured on biomaterial surfaces. The aim of this study was to evaluate the influence of LLLI on the proliferation and viability of human periodontal ligament stem cells (PDLSCs) cultured on chitosan scaffolds. Chitosan was submitted to tests to identify the real mass content and degree of deacetylation. Chitosan membranes were prepared by solvent evaporation technique and submitted to morphology and surface characterization. PDLSCs previously isolated and characterized were grown on the surfaces of four groups: (P) culture plate plastic, non-irradiated, as a positive control of cell growth; (C) chitosan, non-irradiated; (L1) chitosan irradiated with a dose of 1 J/cm²; and (L4) chitosan, irradiated with 4 J/cm². The irradiations were performed with InGaAlP diode laser with wavelength of 660 nm, power 30 mW, tip diameter of 0.01cm², and continuous action mode in a single dose. Cell viability and proliferation were evaluated by Alamar Blue, Live/Dead, Annexin V/PI and Ki67 assays, as well as cell cycle analysis, whereas cell morphology was evaluated by MEV. The data showed that the chitosan presented a real mass content of 88.08% and degree of deacetylation of 91.37 ± 3.77%. SEM analysis showed membranes with uniform and homogeneous surface, with a mean thickness of 68.71 µm. Analysis by AFM revealed roughness around 285 nm. The weight of the membranes ranged from 0.03 to 0.04 g, indicating their uniformity, and the surface pH exhibited a mean of 6.9 ± 0.25, a value close to the pH of the saliva. The Alamar Blue assay showed significant differences in mitochondrial activity between groups at 24 h (L1> C, p = 0.0118) and at 48 h (L1> C, p = 0.0022; L4> C, p = 0.0002; L4>L1, p = 0.0022). The Live/Dead assay showed higher density of live cells in irradiated groups (L1 and L4) compared to the group without irradiation (C), which was confirmed by assay of Annexin V/PI, which showed a greater percentage of viable cells in L4 (89.5%) and L1 (87.0%) compared to C (78.4%) at 72 h. The Ki67 immunoexpression was higher in L4 and L1 and these two groups also showed a higher percentage of cells in the proliferative phases of the cell cycle (S and G2/M). The SEM analysis showed in group C cells with more rounded morphology and with few projections, as well as cell debris, whereas in the irradiated groups the cells exhibited a more flat arrangement, more distributed projections and focal adhesion points, especially in L4. Taken together, the results of the present study shown that laser therapy in the studied patterns, especially at the dose of 4 J/cm², has a positive effect on viability and proliferation of PDLSCs on chitosan membranes, thereby allowing the cells to overcome any adverse effects of the scaffold microenvironment (AU).

The Mechanistic Basis for Photobiomodulation Therapy of Neuropathic Pain by Near Infrared Laser Light

Background and Objective Various irradiances have been reported to be beneficial for the treatment of neuropathic pain with near infrared light. However, the mechanistic basis for the beneficial outcomes may vary based on the level of irradiance or fluence rate used. Using in vivo and in vitro experimentalmodels, this study determined the mechanistic basis of photobiomodulation therapy (PBMT) for the treatment of neuropathic pain using a high irradiance. Study Design/Materials and Methods ln vitro experiments: Cultured, rat DRG were randomly assigned to control or laser treatment (L T) groups with different irradiation times (2, 5, 30, 60 or 120s). The laser parameters were: output power » 960 mW, irradiance » 300mW/cm2, 808 nm wavelength and spot size » 3cm diameter/ area » 7.07cm2, with different fluences according to irradiation times. Mitochondrial metabolic activity was measured with the MTS assay. The DRG neurons were immunostained using a primary antibody to ß-Tubulin III. ln vivo experiments: spared nerve injury surgery (SNI), an animal model of persistent peripheral neuropathic pain, was used. The injured rats were randomly divided into three groups (n » 5). 1) Control: SNI without LT, 2) Short term: SNI with LT on day 7 and euthanized on day 7, 3) Long term: SNI with LT on day 7 and euthanized on day 22. An 808 nm wavelength laser was used for all treatment groups. Treatment was performed once on Day 7 post-surgery. The transcutaneous treatment parameters were: output power: 10 W, fluence rate: 270 mW/cm2, treatment time: 120s. The laser probe was moved along the course of the sciatic/sural nerve during the treatment. Within 1 hour of irradiation, behavior tests were performed to assess its immediate effect on sensory allodynia and hyperalgesia caused by SNI. Results ln vitro experiments: Mitochondrial metabolism was significantly lower compared with controls for all LT groups. Varicosities and undulations formed in neurites of DRG neurons with a cell body diameter 30µm or less. ln neurites of DRG neurons with a cell body diameter of greater than 30µm, varicosities formed only in the 120s group. ln vivo experiments: For heat hyperalgesia, there was a statistically significant reduction in sensitivity to the heat stimulus compared with the measurements done on day 7 prior to LT. A decrease in the sensitivity to the heat stimulus was found in the LT groups compared with the control group on day 15 and 21. For cold allodynia and mechanical hyperalgesia, a significant decrease in sensitivity to cold and pin prick was found within 1 hour after L T. Sensitivity to these stimuli returned to the control levels after 5 days post-L T. No significant difference was found in mechanical allodynia between control and L T groups for all time points examined. Conclusion These in vitro and in vivo studies indicate that treatment with an irradiance/fluence rate at 270 m W/cm2 or higher at the level of the nerve can rapidly block pain transmission. A combination therapy is proposed to treat neuropathic pain with initial high irradiance/fluence rates for fast pain relief, followed by low irradiance/ fluence rates for prolonged pain relief by altering chronic inflammation.

Effects of laser stimulation with different power on oxygen consumption rate of CC myoblasts in mice / 中国应用生理学杂志

OBJECTIVE@#To investigate the effects of 650 nm laser irradiation on cell oxygen consumption rate in CC myoblasts following different doses.@*METHODS@#CC cells were irradiated with 650 nm laser(λ=650 nm, p=5 mW) with energy densities of 0, 0.4, and 0.8 J/cm. Cell oxidative function was measured by oxygen consumption rate kit. Protein expression of myogenic determination factor (MyoD), peroxisome proliferator-activated receptor γ coactivator-1α (PGC-1α), mammalian target of rapamycin (mTOR) and its phosphorylation were detected by Western blot.@*RESULTS@#Compared to the control group, the expression levels of MyoD, PGC-1α protein were increased and cell oxygen consumption rate was promoted in the low dose group(<0.05). MyoD and PGC-1α protein expressions were also increased(<0.05), the ratio of mTOR and its phosphorylationwere decreased significantly in the high dose group(<0.05).@*CONCLUSIONS@#650 nm laser irradiation that dose is 0.4 J/cm enhances cell oxidative function, it related to that proper dose laser irradiation promoted the expression of PGC-1a protein.

Low-Level Laser Irradiation Improves Motor Recovery After Contusive Spinal Cord Injury in Rats

This study investigated the therapeutic effects of low-level laser irradiation (LLLI) on the recovery of motor function and its underlying mechanisms in rats with spinal cord injury (SCI). The spinal cord was contused at the T11 level using a New York University impactor. Thirty-eight rats were randomly divided into four groups: LLLI with 0.08 J, 0.4 J, 0.8 J, and sham. We transcutaneously applied at the lesion site of the spinal contusive rats 5 min after injury and then daily for 21 days. The Basso, Beattie and Bresnahan (BBB) locomotor scale and combined behavioral score (CBS) were used to evaluate motor function. The spinal segments of rostral and caudal from the lesion site, the epicenter, and L4–5 were collected from normal and the all groups at 7 days after SCI. The expression of tumor necrosis factor-α (TNF-α) and inducible nitric oxide synthase (iNOS) was compared across groups in all regions. In the present study, LLLI with 0.4 J and 0.8 J led to a significant improvement in motor function compared to sham LLLI, which significantly decreased TNF-α expression at the lesion epicenter and reduced iNOS expression in the caudal segment for all LLLI groups and in the L4–5 segments for the 0.4 J and 0.8 J groups when compared to sham LLLI group. Our results demonstrate that transcutaneous LLLI modulate inflammatory mediators to enhance motor function recovery after SCI. Thus, LLLI in acute phase after SCI might have therapeutic potential for neuroprotection and restoration of motor function following SCI.

1064-nm Nd: YAG and 980-nm Diode Laser EDTA Agitation on the Retention of an Epoxy-Based Sealer to Root Dentin

Abstract Root canal irrigants are used to minimize the negative effects of smear layer on endodontic sealer retention. The aim of this study was to evaluate the efficacy of agitation of 17% ethylenediaminetetraacetic acid (EDTA) with ultrasonic, 1064-nm Nd:YAG and 980-nm diode laser on the retention of an epoxy-based sealer to the root canal walls. Forty single-rooted bovine teeth were instrumented with ProTaper rotary system and divided into four groups according to the final irrigation protocol (n = 10): (1) 17% EDTA (control); (2) 17% EDTA with 50-s ultrasonic agitation; (3) 17% EDTA with 50-s diode laser (2-W) agitation; and (4) 17% EDTA with 50-s Nd:YAG (1.5-W) laser agitation. After endodontic filling with gutta-percha F5 master cone and Sealer 26, the roots were sectioned at the cervical, middle, and apical root thirds to obtain 1.5-mm slices. Push-out tests were performed using a universal testing machine at a 1 mm/min crosshead speed. Data were analyzed using two-way ANOVA and Tukey's tests (α=0.05). Apical root thirds had significant higher retention values than cervical and middle thirds (p < 0.05). EDTA with 1064-nm Nd:YAG or 980-nm diode laser presented the highest retention values and was significantly different from EDTA with ultrasonic agitation and EDTA only (p < 0.05). Adhesive failures were predominant to EDTA only group. Mixed failures were predominant to all agitation groups. 1064-nm Nd:YAG and 980-nm diode laser EDTA agitation enhanced the retention of the epoxy-based sealer to the root canal walls compared with that due to EDTA only or EDTA with ultrasonic agitation.

Resumo Irrigantes para canais radiculares são usados para minimizar os efeitos negativos da camada de smear na retenção do cimento obturador. O objetivo deste estudo foi avaliar a eficácia da agitação do ácido etilenodiaminotetracético a 17% (EDTA) com ultrassom, Nd:YAG 1064-nm e laser diodo 980-nm na retenção de um cimento obturador à base de resina epóxica nas paredes do canal radicular. Quarenta dentes bovinos unirradiculares foram instrumentados com o sistema rotatório ProTaper e divididos em quatro grupos de acordo com o protocolo de irrigação final (n = 10): (1) EDTA 17% (controle); (2) EDTA 17% com agitação ultrassônica por 50-s; (3) EDTA 17% com agitação com laser diodo (2-W) por 50-s; e (4) EDTA 17% com agitação com laser Nd:YAG (1,5-W) por 50-s. Após obturação endodôntica com cone principal F5 e cimento Sealer 26, as raízes foram seccionadas nos terços radiculares cervical, médio e apical para obtenção de slices de 1,5-mm. Testes de push-out foram realizados utilizando uma máquina universal de ensaios com velocidade de carga de 1 mm/min. Os dados foram analisados utilizando os testes two-way ANOVA e Tukey's (α=0,05). Os terços radiculares apicais tiveram força de adesão significantemente maior que os terços cervical e médio (p<0,05). EDTA com Nd:YAG 1064-nm ou laser diodo 980-nm apresentaram os maiores valores de força de adesão e foram significantemente diferentes do EDTA com agitação ultrassônica e EDTA apenas (p < 0,05). Falhas adesivas foram predominantes apenas no grupo EDTA. Falhas mistas foram predominantes em todos os grupos de agitação. A agitação do EDTA com Nd:YAG 1064-nm e laser diodo 980-nm aumentou a força de adesão do cimento à base de resina epóxica às paredes do canal radicular comparado com a obtida com EDTA apenas ou EDTA com agitação ultrassônica.

Effect of Low-Level Laser Irradiation Preconditioning on Milieu of Infarcted Myocardium in Experimental Rats / 中国循环杂志

Objective: To explore the effect of low-level laser irradiation (LLLI) preconditioning on milieu of infarcted myocardium in experimental rats. Methods: The myocardial infarction (MI) model was established by left anterior descending (LAD) artery ligation in female rats. 3 weeks later, the qualified MI rats were randomly divided for 3 groups: ① LLLI preconditioning group, the rats received thoracotomy for LLLI by a 635nm, 5mW diode laser with the energy density of 0.96 J/cm2 for 150 seconds, n=26. ② Control group, the rats received thoracotomy for daylight irradiation, n=27. ③ Sham operation group, the rats received thoracotomy without LAD ligation, n=24. The Expressions of myocardial vascular endothelial growth factor (VEGF), glucose-regulated protein 78 (GRP78), superoxide dismutase (SOD) and malondialdehyde (MDA) were evaluate by real time-PCR, Western blot analysis and other relevant laboratory test at 1 hour, 1 day and 1 week after treatment. The myocardial cell apoptosis was examined by TUNEL staining, and left ventricular function was detected by echocardiography. Results: LLLI preconditioning obviously increased the myocardial VEGF, GRP78 expression and SOD activity, decreased MDA production; while it could not really improve the myocardial cell apoptosis at peri-infarcted area and left ventricular function in experimental rats. Conclusion: LLLI preconditioning may improve the milieu of infarcted myocardium via decreasing the oxidative stress in experimental rats.

A comparison between 635/808 nm dual-wavelength semiconductor laser and He-Ne laser irradiation in the healing of surgical incisions / 国际生物医学工程杂志

Objective To compare healing effects of surgical incisions using 635 /808 nm dualwavelength semiconductor laser and He-Ne laser irradiation.Methods 168 cases of non-malignant tumor surgery patients were randomly divided into 2 groups:test group including 83 cases which were treated on the surgical incisions by laser irradiation of the semiconductor illumination with low-intensity power; positive control group with 85 cases treated with He-Ne laser.Observation was carried out on incision healing by the clinic manifestations including redness,heat,swelling,pain,exudation,wound open,adverse event and the incision length offset.Results There was no significant difference between experimental group and the control group on incision healing (P＞0.05).Conclusions The treatment efficacy of the dual-wavelength semiconductor laser on surgical incisions healing is similar with that of the He-Ne laser.

Influence of Low Power He-Ne Laser Irradiation on Hemoglobin Concentration, Mean Cellular Volume of Red Blood Cell, and Mean Cellular Hemoglobin / Jurnal Sains Kesihatan Malaysia

The effect of low power 0.95 mW He-Ne laser irradiation (λ = 632.8 nm) on the subpopulations of human blood parameters such as hemoglobin concentration (HGB), mean cellular volume of red blood cell (MCV), and mean cellular hemoglobin (MCH) were investigated by electronic sizing at the Wellness Centre of Universiti Sains Malaysia (USM). These parameters were correlated with human characteristics such as age, gender, ethnic, and blood types. The correlations were obtained by finding patterns in changes of blood parameters after radiation, non-parametric tests using SPSS version 11.5, centroid and peak positions, and flux variations. The analysis revealed significant changes according to human characteristics, for age (p = 0.067), gender (p = 0.044), ethnic (p = 0.094), and blood types (p = 0.099). This finding shows that the centroid and peak positions, flux peak and total flux, were highly correlated with human characteristics and can become a significant indicator for blood analysis. Furthermore, the encircled flux analysis demonstrated a good future prospect in blood research, thus leading the way as a vibrant diagnosis tool to clarify diseases associated with blood.

Healing cutaneous wounds through laser irradiation / 中华物理医学与康复杂志

Objective To quantify the effect of 650 nm semiconductor laser irradiation on cutaneous wound healing in rabbits. Methods Model wounds were induced in 21 adult male rabbits. They were then divided randomly into a control group, a 5 mW irradiation group and a 10 mW irradiation group. Biometry and light microscopy were used to investigate the effect of low intensity laser therapy (LILT) on cutaneous wound healing. Results Statistically significant differences were observed among the groups in terms of wound shrinkage. The differences between the irradiated and control groups were significant at the 5th, 9th and 13th day. However, any differences between the S mW and 10 mW groups were not significant. Conclusions LILT at 650 nm at either 5 mW or 10 mW and 1 J/cm2 accelerates cutaneous wound healing in rabbits. But irradiation at 10 mW is no more effective than at 5 mW.

Effect of Tangnaoluotong Combined with Intravenous Low Intensity Laser Irradiation on Blood Rheology and Endothelin of Diabetes Mellitus and Cerebral Infarction Patients / 中国中医药信息杂志

Objective To observe the effect on the patients of diabetes mellitus and cerebral infarction in terms of level of blood rheology and endothelin after using both intravenous low intensity laser irradiation (ILILI) and traditional Chinese medicine Tangnaoluotong in the treatment. Method Ninety patients of diabetes mellitus and cerebral infarction, having the symptom of deficiency in both vital energy and yin with blood stasis, were divided into three treatment groups at random:ILILI group (A), TCM treatment group (B), and a group with compound treatment of ILILI and TCM (C). The level of blood rheology and endothelin were observed after 1 month’s treatment. Result Compared with group A and group B, group C could significantly reduce the level of fibrinogen and endothelin, improve the deformed ability of RBC. Conclusion ILILI with Tangnaoluotong can significantly alter the blood rheology and endothelin on the patients of diabetes mellitus and cerebral infarction, which result in a better curative effect.

Effects of Low Level Laser Irradiation on Properties of Sodium Channel in Rat Hippocampal Neurons / 生物化学与生物物理进展

0.05). - 40 mV activated threshold potential and - 30 mV peak potential for control group respectively droppedto - 60 mV and - 40 mV after irradiating 7 min. The half-activation voltage and the slope factor of the activationcurves of Na+ channel were also changed by the laser's exposure. The former changed from (- 42.091 ?1.537) mVto (54.971 ?1.846) mV (n= 8, P

The Mechanism of Contralateral Hyperalgesia in the Persistent Muscle Pain Rat Model

OBJECTIVE: This study was designed to investigate the mechanism of the primary afferent input to spread of contralateral hyperalgesia in the persistent muscle pain model in the rat. METHOD: Muscle pain was induced by twice repeated intramuscular injections of pH 6.0 buffered saline into the unilateral gastrocnemius muscle of the rats. Change of mechanical withdrawal threshold to von-Frey filament was measured after ipsilateral laser irradiation, anesthetic blockade with lidocaine and dorsal rhizotomy (L2~L6) to reduce primary afferent input from the tissue injury. RESULTS: Bilateral persistent mechanical hyperalgesia in the hind paw was evoked after second injection. Ipsilateral laser irradiation, lidocaine injection and dorsal rhizotomy had no effect on the contralateral spread of mechanical hyperalgesia. CONCLUSION: These results suggest that contralateral hyperalgesia was produced by, but didn't need to be maintained by inputs from an injury. Therefore, central nervous systems are responsible for the contralateral spread of hyperalgesia.

Effect of intravascular He-Ne laser irradiation on the abnormal lipid metabolism induced by clozapine / 中国康复理论与实践

@#ObjectiveTo observe the effect and side effect of intravascular He-Ne laser irradiation (ILIB) on the abnormal lipid metabolism induced by clozapine.Methods52 patients with schizophrenia (34 males, 18 females) took clozapine alone at a dosage of 200-350 mg/d. All patients were treated with ILIB every other day, 60 min once, ten times altogether. Before and after treatment, lipid metabolism, liver, kidney and blood coagulate functions of patients were tested.ResultsTC, TG, LDL-ch levels of patients decreased obviously after ILIB treatment (P<0.05), while HDL-ch level increased obviously (P<0.01). The liver, kidney and blood coagulate functions were as same as before treatment.ConclusionILIB has an extreme effect on the abnormal lipid metabolism induced by clozapine, and it is quite safe and has clinical practice value.

The effect of intravascular low energy laser irradiation on renal function of patients with early diabetic nephropathy as revealed by the SPECT / 中华物理医学与康复杂志

Objective To investigate the effects of intravascular low energy laser irradiation on blood (ILIB) on renal function of the patients with early diabetic nephropathy. Methods Fifteen patients with type 2 diabetes mellitus complicated with early diabetic nephropathy, were treated with ILIB in addition to the conventional drugs, and observed the maximal time(Tmax)of renal concentration,the variation of 10 minutes residual rate and 15 minutes residual rate, respectively, by using the SPECT of isotone 99mTc-EC before and after ILIB treatment, and compared the results obtained before and after ILIB treatment. Results There were significant differences with regard to the 10 minutes residual rate (both the left and right kidney,P0.05). Conclusion ILIB could improve the excretion and secretion function of renal tubule in patients with the type 2 diabetes mellitus complicated with early diabetic nephropathy, and ILIB could be used as an effectively therapeutic method for patients with early diabetic nephropathy.

Effects of low energy intravenous He-Ne laser irradiation of blood on lymphocytes in patients with cerebral infarction / 中华物理医学与康复杂志

Objective To explore the effects of low energy intravenous He-Ne laser irradiation of blood (ILIB) on cell proliferation, apoptosis and genotoxicity of lymphocytes in patients with cerebral infarction (CI). Methods The lymphocytes in peripheral blood in patients with CI were sampled before and after treatment and cultured, and then, some parameters such as the mitosis index (MI), cell cyclical kinetics index (CCKI), sister chromatid exchanges frequencies (SCEF) and apoptosis were analyzed in order to explore the effects of ILIB on lymphocytes. Results The proliferative activities of lymphocytes were significantly increased by ILIB (P0.05). After ILIB, the rate of apoptosis in patients with CI was significantly increased when compared with that before treatment and that of the control group, as revealed by flow cytometry (FCM) (P

Electroacupuncture plus intravenous laser irradiation for the treatment of functional disorder after craniocerebral injury / 中华物理医学与康复杂志

Objective To observe the therapeutic effect of electroacupuncture plus laser intravenous irradiation therapy on dysfunction caused by craniocerebral injury. Methods One hundred and seventy cases of craniocerebral injury were randomly and equally divided into a treatment group and a control group. The control group was managed with routine treatment, while the treatment group with the electroacupuncture plus the laser intravenous irradiation on the basis of the routine treatment. Results After the treatment, there were significant differences between the two groups in terms of Glasgow Outcome Scale(GOS), Dyscinesia Scale(DS) and Karnofsky Performance Scale(KPS) evaluations. Conclusion The therapeutic effect and clinical outcome of electroacupuncture plus intravenous laser irradiation is significantly better than that in control group, indicating that electroacupuncture plus intravenous laser irradiation is a better therapeutic option for improvement of motor functions.

Effect of photodynamic therapy with laser-activated BPD-MA on the expressions of mitochondria-related proteins Bcl-2 and Bax of human bladder cancer BIU-87 cells / 第三军医大学学报

Objective To study on the mechanisms that photodynamic therapy with laser-activated BPD-MA induces human bladder cancer BIU-87 cell apoptosis.Methods Human bladder cancer BIU-87 cells at log phase were randomized into 4 groups.The cells of BDP-MA-PDT groups were added with BPD-MA and then activated with 632.8 nm He-Ne laser;PDT group without BDP-MA addition was only irradiated;BDP-MA group without irradiation;normal control group without BDP-MA addition or irradiation.Photosensitization of BPD-MA was activated by laser with red light(632.8 nm) delivered at 10 mw/cm~(2) to give a total dose of 2.4 J/cm~(2).The expression of Bcl-2 and Bax proteins in human bladder cancer BIU-87 cells were detected by immunohistochemical staining.Results The Bcl-2 protein expression in BPD-MA-PDT group was lower than that of other groups(P0.05),therefore the ratio of Bax to Bcl-2 obviously increased(P

A histologic and autoradiographic study on the early changes in the movements of rat incisors / 대한치과교정학회지

The purpose of this study was to quantify the biologic effects of the tensile forces from helical springs across the maxillary incisors on the periodontal tissues of rats. 39 Sprague-Dawlely rats were divided into a control group(3 rats) and three experimental groups(36 rats)-group 1, pressured with a light force(50-75g), group 2, with a heavy force(250-300g) and group 3, with a heavy force(250-300g) plus laser irradiation. Autoradiographic and histopathologic observations were performed in 12, 24, 48 and 96 hours after force application. The result were as follow: 1. Hyalinized zone of periodontal ligament began to appear at pressure side in 12 hours in group 2 and group 3 ; all decreased in 96 hours except in group 2. 2. Alveolar bone resorption began to appear in 12 hours in group 2 and group 3 ; Group 2 showed more resorption than group 1 and no difference to group 3. 3. Tearing of periodontal ligament and vascular dilatation began to appear at tension side in 12 hours in all groups ; Group 2 showed more changes than group 1 and no difference to group 3 ; Decrease began to appear in 96 hours. 4. New bone formation began to appear at tension side in 12 hours and increased more and more; No differences were shown of groups 5. New capillary proliferation began to appear at pressure side in 12 hours; The changes were the greatest in group 3, group 2, group 1, in that order. 6. Positive reaction of cells to [3H]-thymidine was the greatest in 24 hours of all groups and decreased with times ; Group 2 showed more reaction than group 1 and no difference to group 3.