Pub Date : 2020-04-23DOI: 10.24931/2413-9432-2020-9-1-34-41
A. Kaprin, V. Ivanova-Radkevich, A. Urlova, A. T. Asratov, Y. Gushchina, L. Libo, C. Xiaojun, E. Filonenko
{"title":"Successes of photodynamic therapy in treatment of erythroplasia of Queyrat","authors":"A. Kaprin, V. Ivanova-Radkevich, A. Urlova, A. T. Asratov, Y. Gushchina, L. Libo, C. Xiaojun, E. Filonenko","doi":"10.24931/2413-9432-2020-9-1-34-41","DOIUrl":"https://doi.org/10.24931/2413-9432-2020-9-1-34-41","url":null,"abstract":"","PeriodicalId":37713,"journal":{"name":"Biomedical Photonics","volume":"124 18","pages":"34-41"},"PeriodicalIF":0.0,"publicationDate":"2020-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141210300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-04-23DOI: 10.24931/2413-9432-2020-9-1-4-12
A. Tseimakh, A. Lazarev, E. Sekerzhinskaya, V. Kurtukov, A. N. Mitshenko, V. Teplukhin, Y. Shoykhet
The paper presents the results of a complex palliative treatment using photodynamic therapy of patients with pancreatobiliary malignancies complicated by obstructive jaundice. In the main group, which included 22 patients, palliative comprehensive treatment was performed using local and systemic photodynamic therapy of pancreatobiliary neoplasms complicated by obstructive jaundice. In the comparison group, consisting of 165 patients, palliative complex treatment of complications was performed without the use of photodynamic therapy. The used photosensitizers were chlorin-based fotoditazin (21 patients) and radachlorin (1 patient). The first step was a systemic PDT. In the course of infusion through a peripheral access into the cubital vein, blood was irradiated externally by laser with monochromatic light with a wavelength of 662–665 nm and a light dose of 1200–1400 J/cm 2 . As the second stage of the treatment, 3–5 hours after the end of the infusion, an intraductal PDT was carried out by irradiation with monochromatic light with a wavelength of 662 nm and a light dose of 220 J/cm 2 . After the use of local and systemic photodynamic therapy, a statistically significant decrease in the size of the tumor focus in patients with pancreatic malignant neoplasms was established within a week after treatment in the main group according to the ultrasound examination of the abdominal cavity. Restoration of bile excretion into the intestine was noted in 100% of patients with malignant neoplasms of the bile duct and head of the pancreas. We also note an increase in median survival of patients in the main group to 5.9 months compared with 4.7 months in the comparison group.
{"title":"Palliative treatment with the use of photodynamic therapy of patients with malignant tumors of pancreatobiliary zone complicated by obstructive jaundice","authors":"A. Tseimakh, A. Lazarev, E. Sekerzhinskaya, V. Kurtukov, A. N. Mitshenko, V. Teplukhin, Y. Shoykhet","doi":"10.24931/2413-9432-2020-9-1-4-12","DOIUrl":"https://doi.org/10.24931/2413-9432-2020-9-1-4-12","url":null,"abstract":"The paper presents the results of a complex palliative treatment using photodynamic therapy of patients with pancreatobiliary malignancies complicated by obstructive jaundice. In the main group, which included 22 patients, palliative comprehensive treatment was performed using local and systemic photodynamic therapy of pancreatobiliary neoplasms complicated by obstructive jaundice. In the comparison group, consisting of 165 patients, palliative complex treatment of complications was performed without the use of photodynamic therapy. The used photosensitizers were chlorin-based fotoditazin (21 patients) and radachlorin (1 patient). The first step was a systemic PDT. In the course of infusion through a peripheral access into the cubital vein, blood was irradiated externally by laser with monochromatic light with a wavelength of 662–665 nm and a light dose of 1200–1400 J/cm 2 . As the second stage of the treatment, 3–5 hours after the end of the infusion, an intraductal PDT was carried out by irradiation with monochromatic light with a wavelength of 662 nm and a light dose of 220 J/cm 2 . After the use of local and systemic photodynamic therapy, a statistically significant decrease in the size of the tumor focus in patients with pancreatic malignant neoplasms was established within a week after treatment in the main group according to the ultrasound examination of the abdominal cavity. Restoration of bile excretion into the intestine was noted in 100% of patients with malignant neoplasms of the bile duct and head of the pancreas. We also note an increase in median survival of patients in the main group to 5.9 months compared with 4.7 months in the comparison group.","PeriodicalId":37713,"journal":{"name":"Biomedical Photonics","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68974669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-04-23DOI: 10.24931/2413-9432-2020-9-1-42-46
D. M. Yagudaev, G. P. Gens, Z. Kadyrov, A. V. Tikhonenko, N. Kalyagina
{"title":"Photodynamic therapy of penile cancer","authors":"D. M. Yagudaev, G. P. Gens, Z. Kadyrov, A. V. Tikhonenko, N. Kalyagina","doi":"10.24931/2413-9432-2020-9-1-42-46","DOIUrl":"https://doi.org/10.24931/2413-9432-2020-9-1-42-46","url":null,"abstract":"","PeriodicalId":37713,"journal":{"name":"Biomedical Photonics","volume":"123 21","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141210319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-04-23DOI: 10.24931/2413-9432-2020-9-1-34-41
A. Kaprin, V. Ivanova-Radkevich, A. Urlova, A. T. Asratov, Y. Gushchina, L. Libo, C. Xiaojun, E. Filonenko
{"title":"Successes of photodynamic therapy in treatment of erythroplasia of Queyrat","authors":"A. Kaprin, V. Ivanova-Radkevich, A. Urlova, A. T. Asratov, Y. Gushchina, L. Libo, C. Xiaojun, E. Filonenko","doi":"10.24931/2413-9432-2020-9-1-34-41","DOIUrl":"https://doi.org/10.24931/2413-9432-2020-9-1-34-41","url":null,"abstract":"","PeriodicalId":37713,"journal":{"name":"Biomedical Photonics","volume":"122 37","pages":"34-41"},"PeriodicalIF":0.0,"publicationDate":"2020-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141210333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-04-23DOI: 10.24931/2413-9432-2020-9-1-21-26
D. Schitz, I. E. Torshina, N. V. Nekrasova, T. M. Busko
Intermediate ultraviolet (UVB) therapy is considered a relatively safe method of treating skin diseases with an autoimmune component in development compared to medical drug methods, including PUVA therapy. This is due to the small depth of penetration of the rays of this wavelength range into skin, which provides a purely local effect on the human body. Excimer lamps are an alternative to the expensive excimer laser for phototherapy of psoriasis or vitiligo. However, for effective phototherapy using UVB lamps, the distance from an emitter to a patient’s skin must be considered. In this paper, we report on treatment of patients using an excimer lamp, the control unit of which is equipped with an optical system for controlling of ultraviolet radiation dose, which allows automatically calculating the time for a set UVB dose. The article describes the results of phototherapy using an excimer lamp of several cases of psoriasis, vitiligo and other forms of dermatitis with a good therapeutic and cosmetic effect. When using an excimer lamp, not a single case of exacerbation of dermatological diseases was established.
{"title":"Experience of using an excimer lamp equipped with UVB dose control system in dermatology","authors":"D. Schitz, I. E. Torshina, N. V. Nekrasova, T. M. Busko","doi":"10.24931/2413-9432-2020-9-1-21-26","DOIUrl":"https://doi.org/10.24931/2413-9432-2020-9-1-21-26","url":null,"abstract":"Intermediate ultraviolet (UVB) therapy is considered a relatively safe method of treating skin diseases with an autoimmune component in development compared to medical drug methods, including PUVA therapy. This is due to the small depth of penetration of the rays of this wavelength range into skin, which provides a purely local effect on the human body. Excimer lamps are an alternative to the expensive excimer laser for phototherapy of psoriasis or vitiligo. However, for effective phototherapy using UVB lamps, the distance from an emitter to a patient’s skin must be considered. In this paper, we report on treatment of patients using an excimer lamp, the control unit of which is equipped with an optical system for controlling of ultraviolet radiation dose, which allows automatically calculating the time for a set UVB dose. The article describes the results of phototherapy using an excimer lamp of several cases of psoriasis, vitiligo and other forms of dermatitis with a good therapeutic and cosmetic effect. When using an excimer lamp, not a single case of exacerbation of dermatological diseases was established.","PeriodicalId":37713,"journal":{"name":"Biomedical Photonics","volume":"122 49","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141210328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-04-23DOI: 10.24931/2413-9432-2020-9-1-13-20
Y. Chepurnaya, G. Melkonyan, N. T. Gulmuradova, T. A. Gadjikerimov, A. Suvorov, S. V. Kiseleva
For many years, the treatment of purulent diseases of the hand has stayed relevant. Despite the progress in modern medicine, this pathology retains its prevalence and, most importantly, is often found in patients of the working age, which determines the socio-economic importance of the search for new approaches to the treatment of purulent diseases of this localization. In the purulent surgery department of State Clinical hospital № 4, a study and treatment of two groups of patients were carried out: patients with phlegmons and felons of the hand with open management of postoperative wounds using traditional treatment methods (antibiotic therapy, immobilization, dressings with antiseptic solutions and ointments, the use of wound enzymes) and with the use of photodynamic therapy (PDT) in the postoperative period. PDT was performed on the second or third day after opening the phlegmon or felon using an ATKUS-2 semiconductor laser (AO “Poluprovodnikovye pribory”, Russia) with an output power of 1 to 2 W, an operating wavelength of 660 ± 0.03 nm and an energy density between 20 and 25 J/cm² after application of the photosensitizer based on chlorin e 6 to the treated wound area. The article describes the technique of PDT in patients with purulent diseases of the hand. It was found that it is optimal to perform PDT as early as possible after the operation period, but not earlier than on the second day after the operation, because earlier dressing is especially painful in the absence of sutures and can lead to bleeding from a postoperative wound when the dressing is removed. The effectiveness of treatment in the studied groups was evaluated: the terms of inpatient healing in the groups were compared; the dynamics of the course of the wound process was analyzed. When comparing the results of the two groups, a significant acceleration in the healing of the postoperative wounds was noted in patients for whom PDT was used – 5 days (1.4 times) faster compared to treatment according to the generally accepted technique. The early appearance of granulations and the antibacterial effect of this procedure are noted, which significantly improves the treatment outcome for this pathology. This makes the use of PDT relevant and appropriate in the complex treatment of purulent diseases of the hand
{"title":"Application of photodynamic therapy in complex treatment of purulent diseases of the hand","authors":"Y. Chepurnaya, G. Melkonyan, N. T. Gulmuradova, T. A. Gadjikerimov, A. Suvorov, S. V. Kiseleva","doi":"10.24931/2413-9432-2020-9-1-13-20","DOIUrl":"https://doi.org/10.24931/2413-9432-2020-9-1-13-20","url":null,"abstract":"For many years, the treatment of purulent diseases of the hand has stayed relevant. Despite the progress in modern medicine, this pathology retains its prevalence and, most importantly, is often found in patients of the working age, which determines the socio-economic importance of the search for new approaches to the treatment of purulent diseases of this localization. In the purulent surgery department of State Clinical hospital № 4, a study and treatment of two groups of patients were carried out: patients with phlegmons and felons of the hand with open management of postoperative wounds using traditional treatment methods (antibiotic therapy, immobilization, dressings with antiseptic solutions and ointments, the use of wound enzymes) and with the use of photodynamic therapy (PDT) in the postoperative period. PDT was performed on the second or third day after opening the phlegmon or felon using an ATKUS-2 semiconductor laser (AO “Poluprovodnikovye pribory”, Russia) with an output power of 1 to 2 W, an operating wavelength of 660 ± 0.03 nm and an energy density between 20 and 25 J/cm² after application of the photosensitizer based on chlorin e 6 to the treated wound area. The article describes the technique of PDT in patients with purulent diseases of the hand. It was found that it is optimal to perform PDT as early as possible after the operation period, but not earlier than on the second day after the operation, because earlier dressing is especially painful in the absence of sutures and can lead to bleeding from a postoperative wound when the dressing is removed. The effectiveness of treatment in the studied groups was evaluated: the terms of inpatient healing in the groups were compared; the dynamics of the course of the wound process was analyzed. When comparing the results of the two groups, a significant acceleration in the healing of the postoperative wounds was noted in patients for whom PDT was used – 5 days (1.4 times) faster compared to treatment according to the generally accepted technique. The early appearance of granulations and the antibacterial effect of this procedure are noted, which significantly improves the treatment outcome for this pathology. This makes the use of PDT relevant and appropriate in the complex treatment of purulent diseases of the hand","PeriodicalId":37713,"journal":{"name":"Biomedical Photonics","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68974254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-04-23DOI: 10.24931/2413-9432-2020-9-1-27-33
Yaroslav A. Soloviev, L. Mitina, B. Alekseev, S. Stepanov, A. Kalpinskiy, O. V. Dimitrov, E. A. Nazoikin
In developed countries, the main methods of research and dynamic monitoring of cystic kidney formations are CT and MRI, but their use is impossible in patients with severe concomitant diseases, as well as in the presence of metal structures, pacemakers, etc. Additionally, taking into account the high dose of radiation exposure when using CT obtained by the patient during dynamic observation, the development of alternative methods is relevant. These include, but not limited to, ultrasound using contrast enhancement, which can be used as an alternative or additional method in primary diagnosis or in the dynamic observation of cystic kidney formations. In the article, the authors provide their own experience with the use of an ultrasound contrast medium for the diagnosis and dynamic observation of complex kidney cysts, as well as the introduction of ultrasound observation using a contrast medium to classify patients according to Bosniak M.A.The study included the results of the use of contrast enhanced ultrasound (CEUS) in 28 patients with various cystic formations of the kidneys. The patients were previously divided into two groups: the first consisted of 13 patients with simple cysts, the second – 15 with suspected complex cysts. As a result of the study, the patients were distributed as follows: 15 patients were classified as Bosniak type I, 7 patients – as type II, 3 - type III, 3 - type IV. The studied CEUS method is simple and effective. The specificity of the method was 78.57%, the accuracy of the method was 85.71%, the predictive value of the positive result was 81.25%, and the predictive value of the negative result was 91.66%. CEUS helps to quickly and accurately conduct differential diagnosis between a simple cyst and a complex one, as well as classify cysts according to M.A. Bosniak.
{"title":"The use of contrast enhancement in the diagnosis of simple and complex cysts kidneys","authors":"Yaroslav A. Soloviev, L. Mitina, B. Alekseev, S. Stepanov, A. Kalpinskiy, O. V. Dimitrov, E. A. Nazoikin","doi":"10.24931/2413-9432-2020-9-1-27-33","DOIUrl":"https://doi.org/10.24931/2413-9432-2020-9-1-27-33","url":null,"abstract":"In developed countries, the main methods of research and dynamic monitoring of cystic kidney formations are CT and MRI, but their use is impossible in patients with severe concomitant diseases, as well as in the presence of metal structures, pacemakers, etc. Additionally, taking into account the high dose of radiation exposure when using CT obtained by the patient during dynamic observation, the development of alternative methods is relevant. These include, but not limited to, ultrasound using contrast enhancement, which can be used as an alternative or additional method in primary diagnosis or in the dynamic observation of cystic kidney formations. In the article, the authors provide their own experience with the use of an ultrasound contrast medium for the diagnosis and dynamic observation of complex kidney cysts, as well as the introduction of ultrasound observation using a contrast medium to classify patients according to Bosniak M.A.The study included the results of the use of contrast enhanced ultrasound (CEUS) in 28 patients with various cystic formations of the kidneys. The patients were previously divided into two groups: the first consisted of 13 patients with simple cysts, the second – 15 with suspected complex cysts. As a result of the study, the patients were distributed as follows: 15 patients were classified as Bosniak type I, 7 patients – as type II, 3 - type III, 3 - type IV. The studied CEUS method is simple and effective. The specificity of the method was 78.57%, the accuracy of the method was 85.71%, the predictive value of the positive result was 81.25%, and the predictive value of the negative result was 91.66%. CEUS helps to quickly and accurately conduct differential diagnosis between a simple cyst and a complex one, as well as classify cysts according to M.A. Bosniak.","PeriodicalId":37713,"journal":{"name":"Biomedical Photonics","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68974319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-04-23DOI: 10.24931/2413-9432-2020-9-1-21-26
D. Schitz, I. E. Torshina, N. V. Nekrasova, T. M. Busko
Intermediate ultraviolet (UVB) therapy is considered a relatively safe method of treating skin diseases with an autoimmune component in development compared to medical drug methods, including PUVA therapy. This is due to the small depth of penetration of the rays of this wavelength range into skin, which provides a purely local effect on the human body. Excimer lamps are an alternative to the expensive excimer laser for phototherapy of psoriasis or vitiligo. However, for effective phototherapy using UVB lamps, the distance from an emitter to a patient’s skin must be considered. In this paper, we report on treatment of patients using an excimer lamp, the control unit of which is equipped with an optical system for controlling of ultraviolet radiation dose, which allows automatically calculating the time for a set UVB dose. The article describes the results of phototherapy using an excimer lamp of several cases of psoriasis, vitiligo and other forms of dermatitis with a good therapeutic and cosmetic effect. When using an excimer lamp, not a single case of exacerbation of dermatological diseases was established.
{"title":"Experience of using an excimer lamp equipped with UVB dose control system in dermatology","authors":"D. Schitz, I. E. Torshina, N. V. Nekrasova, T. M. Busko","doi":"10.24931/2413-9432-2020-9-1-21-26","DOIUrl":"https://doi.org/10.24931/2413-9432-2020-9-1-21-26","url":null,"abstract":"Intermediate ultraviolet (UVB) therapy is considered a relatively safe method of treating skin diseases with an autoimmune component in development compared to medical drug methods, including PUVA therapy. This is due to the small depth of penetration of the rays of this wavelength range into skin, which provides a purely local effect on the human body. Excimer lamps are an alternative to the expensive excimer laser for phototherapy of psoriasis or vitiligo. However, for effective phototherapy using UVB lamps, the distance from an emitter to a patient’s skin must be considered. In this paper, we report on treatment of patients using an excimer lamp, the control unit of which is equipped with an optical system for controlling of ultraviolet radiation dose, which allows automatically calculating the time for a set UVB dose. The article describes the results of phototherapy using an excimer lamp of several cases of psoriasis, vitiligo and other forms of dermatitis with a good therapeutic and cosmetic effect. When using an excimer lamp, not a single case of exacerbation of dermatological diseases was established.","PeriodicalId":37713,"journal":{"name":"Biomedical Photonics","volume":"119 28","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141210462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-04-23DOI: 10.24931/2413-9432-2020-9-1-42-46
D. M. Yagudaev, G. P. Gens, Z. Kadyrov, A. V. Tikhonenko, N. Kalyagina
{"title":"Photodynamic therapy of penile cancer","authors":"D. M. Yagudaev, G. P. Gens, Z. Kadyrov, A. V. Tikhonenko, N. Kalyagina","doi":"10.24931/2413-9432-2020-9-1-42-46","DOIUrl":"https://doi.org/10.24931/2413-9432-2020-9-1-42-46","url":null,"abstract":"","PeriodicalId":37713,"journal":{"name":"Biomedical Photonics","volume":"122 34","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141210335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-19DOI: 10.24931/2413-9432-2019-8-3-4-10
N. Petrishchev, M. Galkin, T. Grishacheva, I. N. Dementjeva, S. Chefu
The goal of the study is to evaluate the effect of Radachlorin (OOO “RADA-PHARMA”, Russia) (RC) on platelet aggregation in ex vivo and in vivo experiments. The experiments were conducted on male Wistar rats. Platelet aggregation activity was determined in platelet-rich plasma (PRP) using a turbidimetric method and the aggregation inducer was ADP at a final concentration of 1.25 μM. PRP samples containing RC were irradiated with ALOD-Granat laser device (OOO “Alkom Medika”, Russia) at 662 nm wavelength with 0.05 W/cm2 power density. After a 5-minute incubation of PRP with RC in the dark, dose-dependent inhibition of platelet aggregation was observed. Laser irradiation (12.5 J/cm2 and, especially, 25 J/cm2) increased the inhibitory effect of RC. 3 hours after intravenous administration of RC, the rate and intensity of platelets aggregation did not change, while disaggregation slowed down significantly. Irradiation at a dose of 5 J/cm2 did not affect the platelets aggregation kinetics, and disaggregation slowed down even more at 10 J/cm2, and at 20 J/cm2 the rate and intensity of platelets aggregation decreased, and no disaggregation occurred.In vitro, RC inhibited the ADP-induced platelet aggregation in rats in a dose-dependent manner; after laser irradiation, this effect was enhanced significantly. The effect of RC on circulating platelets leads to a change in their functional state, which manifests in slowing down the disaggregation after exposure to ADP. After laser irradiation (10 J/cm2 and, especially, 20 J/cm2), the severity of the functional changes increases. The role of decreasing the disaggregation activity of platelets in the mechanism of vascular thrombosis in the affected area of photodynamic therapy (PDT) is discussed.
{"title":"The effect of chlorin e6 drug on platelet aggregation activity","authors":"N. Petrishchev, M. Galkin, T. Grishacheva, I. N. Dementjeva, S. Chefu","doi":"10.24931/2413-9432-2019-8-3-4-10","DOIUrl":"https://doi.org/10.24931/2413-9432-2019-8-3-4-10","url":null,"abstract":"The goal of the study is to evaluate the effect of Radachlorin (OOO “RADA-PHARMA”, Russia) (RC) on platelet aggregation in ex vivo and in vivo experiments. The experiments were conducted on male Wistar rats. Platelet aggregation activity was determined in platelet-rich plasma (PRP) using a turbidimetric method and the aggregation inducer was ADP at a final concentration of 1.25 μM. PRP samples containing RC were irradiated with ALOD-Granat laser device (OOO “Alkom Medika”, Russia) at 662 nm wavelength with 0.05 W/cm2 power density. After a 5-minute incubation of PRP with RC in the dark, dose-dependent inhibition of platelet aggregation was observed. Laser irradiation (12.5 J/cm2 and, especially, 25 J/cm2) increased the inhibitory effect of RC. 3 hours after intravenous administration of RC, the rate and intensity of platelets aggregation did not change, while disaggregation slowed down significantly. Irradiation at a dose of 5 J/cm2 did not affect the platelets aggregation kinetics, and disaggregation slowed down even more at 10 J/cm2, and at 20 J/cm2 the rate and intensity of platelets aggregation decreased, and no disaggregation occurred.In vitro, RC inhibited the ADP-induced platelet aggregation in rats in a dose-dependent manner; after laser irradiation, this effect was enhanced significantly. The effect of RC on circulating platelets leads to a change in their functional state, which manifests in slowing down the disaggregation after exposure to ADP. After laser irradiation (10 J/cm2 and, especially, 20 J/cm2), the severity of the functional changes increases. The role of decreasing the disaggregation activity of platelets in the mechanism of vascular thrombosis in the affected area of photodynamic therapy (PDT) is discussed.","PeriodicalId":37713,"journal":{"name":"Biomedical Photonics","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68974235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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