scholarly journals Morphological manifestations of experimental paclitaxel-induced sciatic neuropathy under correction of 2-ethyl-6-methyl-3-hydroxypyridine succinate

2021 ◽  
pp. 20-26
Author(s):  
Mykola Ostrovskyi
Keyword(s):  
Peripheral Neuropathy ◽  
Myelin Sheath ◽  
Isotonic Saline ◽  
Nerve Fibers ◽  
Morphological Studies ◽  
White Rats ◽  
Maximum Value ◽  
Prevention And Treatment ◽  
Profile Area ◽  
Axial Cylinder

Paclitaxel is an effective chemotherapeutic agent for many cancers, but it has a number of limiting side effects that not only significantly reduce the quality of life of patients, but also limit their further treatment. Peripheral neuropathy is one of these, but there are currently no proven effective druHS for the prevention or treatment of paclitaxel-induced neuropathic pain (PINP) in particular, or chemotherapy-induced peripheral neuropathy (CIPN) in general. 2-ethyl-6-methyl-3-hydroxypyridine succinate (HS) is a derivative of succinic acid with neuroprotective, antihypoxic, membrane-protective, nootropic, sedative effects. The aim of the study was to study the effect of the neuroprotective agent HS on the pathomorphogenesis of the sciatic nerves under conditions of paclitaxel-induced peripheral neuropathy in the experiment. Materials and methods. The experiment was carried out on 80 white rats, which were injected intraperitoneally with paclitaxel (Actavis, Romania), previously dissolved in isotonic saline at a dose of 2 mg / kg of body weight four times every other day until a total dose of 8 mg / kg was reached. Then forty of these animals were injected intraperitoneally with 2-ethyl-6-methyl-3-hydroxypyridine succinate at a dose of 10 mg / kg (the remaining 40 rats received intraperitoneal water for injection). Morphological studies were carried out on the first, seventh, fifteenth, twenty-eighth, sixtieth, ninetieth and one hundred and twentieth days after the last injection of the drug. We investigated the pharmacological potential of HS in the prevention and treatment of CIPN at the level of sciatic nerve (SN) morphology. Results. The maximum value of the average profile area of myelinated nerve fibers with the use of HS is significantly lower than with uncorrected flow, and is (78.12±2.24) μm2 compared to (94.04±1.03) μm2 (p <0.001). The introduction of HS provides a stable content of the value of the ratio of the areas of the axial cylinder and the fiber within 0.39±0.01 (first day) - 0.44±0.01 (ninetieth day), and a rapid recovery of the indicator value to normal values during the final 30 days of the experiment. the maximum value of the index of the profile area of the myelin sheath with the introduction of HS is 1.4 times less than with an uncorrected flow, and is, respectively, (49.01±1.59) μm2 and (69.77±1.87) μm2 (p <0.001). HS provides a more intensive restoration of the indicator of the area of the myelin sheath during the 90th - 120th day of the experiment. Conclusions. Our results allow us to conclude that the introduction of HS creates a protective effect against paclitaxel-induced peripheral neuropathy (PIPN) by acting on both the axial cylinder and the myelin sheath of the heart failure. Due to the known pathophysiological mechanisms of the development of neuropathy, this method can be a promising therapeutic agent for the prevention and treatment of PIPN

scholarly journals MORPHOLOGICAL MANIFESTATIONS OF EXPERIMENTAL PACLITAXEL-INDUCED SICK NERVE NEUROPATHY UNDER CORRECTION OF 2-ETHYL-6-METHYLIDE-3-HYCYDYR-3-HYDYCIDE-3

2021 ◽  
Vol 2 (4(68)) ◽  
pp. 32-38
Author(s):  
M. Ostrovskij ◽  
S. Gerashenko
Keyword(s):  
Peripheral Neuropathy ◽  
Isotonic Saline ◽  
Therapeutic Tool ◽  
Morphological Studies ◽  
White Rats ◽  
Prevention And Treatment ◽  
Pharmacological Potential ◽  
Sedative Action ◽  
Effective Drugs

Paclitaxel is an effective chemotherapeutic agent for many cancers, but has a number of limiting side effects that not only significantly reduce the quality of life of patients, but also limit their further treatment. Peripheral neuropathy is one of these, but as of today, there are no proven effective drugs for the prevention or treatment of paclitaxel-induced neuropathic pain (IDP) in particular, or peripheral chemotherapy-induced neuropathy (PIH) in general. 2-ethyl-6-methyl-3-hydroxypyridine succinate (HS) is a derivative of succinic acid with neuroprotective, antihypoxic, membrane-protective, nootropic, sedative action. The experiment was performed on 80 white rats injected intraperitoneally with paclitaxel (Actavis, Romania), pre-dissolved in isotonic saline at a dose of 2 mg / kg body weight four times a day until a total dose of 8 mg / kg. Forty of these animals were then injected intraperitoneally with 2-ethyl-6-methyl-3-hydroxypyridine succinate at a dose of 10 mg / kg (the other 40 rats received intraperitoneal water for injection). Morphological studies were performed on the 1st, 7th, 15th, 28th, 60th, 90th and 120th days after the last administration of the drug. We investigated the pharmacological potential of HS in the prevention and treatment of PNH at the level of the sciatic nerve (CH). Our results allow us to conclude that the introduction of HS creates a protective effect against paclitaxel-induced peripheral neuropathy (PIPN) by affecting both the axial cylinder and the myelin sheath of HF. Due to the known pathophysiological mechanisms of neuropathy, this method can be a promising therapeutic tool for the prevention and treatment of PIPN.

scholarly journals Cluster Analysis of Myelin Nerve Fibers of the Periferal Nerve

2020 ◽  
Vol 26 (1) ◽  
Author(s):  
Omelian Yurakh ◽  
Oksana Popadynets ◽  
Halyna Yurakh ◽  
Mykhailo Osypchuk ◽  
Nadiya Tokaruk ◽  
...  
Keyword(s):  
Cluster Analysis ◽  
Sciatic Nerve ◽  
Myelin Sheath ◽  
Statistical Processing ◽  
Nerve Fibers ◽  
Software Environment ◽  
Thin Sections ◽  
Male Wistar Rats ◽  
Axial Cylinder

One of the unsolved issues in neuromorphology is the classification of myelin nerve fibers (MNF). Objective: to use cluster analysis to classify the sciatic nerve MNF. Material and methods. The work was performed using 5 one-year-old male Wistar rats. Semi-thin sections were stained with methylene blue. MNF morphometry was performed using ImageJ, and statistical processing – using the software environment R. Results of the study. Ward’s and k-means methods were used to cluster the MNF. Three clusters of MNFs are defined and their parameters are determined. The presented algorithm for adapting the literature data to the format of the obtained results includes determining the total average for the combined set of each indicator and the total variance, which is the sum of intragroup and intergroup variances. Conclusions: 1) for the classification of MNF it is advisable to use cluster analysis; 2) clustering should be performed according to the transsection areas of the axial cylinder and myelin sheath; 3) the number of clusters is determined by the agglomerative method of Ward, and their metrics – by the iterative method of k-means; 4) three clusters of MNF of the rat sciatic nerve differ in the transsection areas of the fibers, the axial cylinder and the myelin sheath and the percentage of nerve fibers; 5) when comparing identical indicators according to the obtained and literature data, the results were equivalent in the areas of the axial cylinder and myelin sheath and their shape coefficients, despite the fact that the classification of myelin fibers and their morphometry was performed using different methods.

Drug-Induced Peripheral Neuropathy: Diagnosis and Management

2021 ◽  
Vol 21 ◽  
Author(s):  
Diala Merheb ◽  
Georgette Dib ◽  
Maroun Bou Zerdan ◽  
Clara El Nakib ◽  
Saada Alame ◽  
...  
Keyword(s):  
Peripheral Neuropathy ◽  
Systematic Approach ◽  
Viral Infections ◽  
Cost Effective ◽  
Nerve Fibers ◽  
Drug Induced ◽  
Vitamin Deficiencies ◽  
Effective Diagnosis ◽  
Different Parts ◽  
Pathophysiologic Mechanisms

: Peripheral neuropathy comes in all shapes and forms and is a disorder which is found in the peripheral nervous system. It can have an acute or chronic onset depending on the multitude of pathophysiologic mechanisms involving different parts of nerve fibers. A systematic approach is highly beneficial when it comes to cost-effective diagnosis. More than 30 causes of peripheral neuropathy exist ranging from systemic and auto-immune diseases, vitamin deficiencies, viral infections, diabetes, etc. One of the major causes of peripheral neuropathy is drug induced disease, which can be split into peripheral neuropathy caused by chemotherapy or by other medications. This review deals with the latest causes of drug induced peripheral neuropathy, the population involved, the findings on physical examination and various workups needed and how to manage each case.

scholarly journals PENGARUH AKUPUNKTUR JIN’S 3 NEEDLE TERHADAP PENURUNAN INTENSITAS NYERI DIABETIC NEUROPATHY PERIFER

2020 ◽  
Vol 4 (1) ◽  
pp. 46-51
Author(s):  
Leny Candra Kurniawan ◽  
Ikhwan Abdullah
Keyword(s):  
Peripheral Neuropathy ◽  
Side Effects ◽  
Diabetic Neuropathy ◽  
Diabetic Peripheral Neuropathy ◽  
Nerve Fibers ◽  
Significance Level ◽  
Peripheral Diabetic Neuropathy ◽  
Study Population ◽  
Sugar Levels ◽  
Needle Acupuncture

Diabetic Peripheral Neuropathy is a type of nerve damagethat occurs due to diabetes. High blood sugar levels in thelong term can cause damage to nerve fibers throughout thebody, such as legs, feet, blood circulation, heart, digestivesystem, and urinary tract. Diabetic Peripheral Neuropathy isa serious complication of diabetes that often causes pain inthe limbs. Pain management Diabetic Peripheral Neuropathyis usually by administering pain medication for a long periodof time. These medicines will have side effects. The use ofacupuncture as an alternative to help reduce the intensity ofpain in peripheral diabetic neuropathy has proven to beeffective and relatively without side effects. The advantage ofacupuncture therapy is that it has relatively no side effects.The general aim of this study is to reduce the intensity of painin peripheral neuropathy. The research design usesquantitative methods. The study population was all patientswith peripheral neuropathy who visited the Harmoni HealthyClinic in March-May 2019. The sampling method used wasaccidental sampling. The benefits of this study provide analternative for DM sufferers to reduce the intensity ofneuropathic pain naturally with acupuncture without fear.side effects. From the results of this study it is known thatthere is an influence of Jin’s Three Needle acupuncture inreducing the intensity of pain in Peripheral Neuropathy.Calculations using statistical SPSS 21 with paired sample ttest obtained significant results (0.00) from the value of α(0.05), then H1 is accepted. So with a significance level of5%, it can be concluded that Jin's Three Needle acupuncturecan reduce the intensity of pain in diabetic peripheralneuropathy

Biofabrication of nerve fibers with mimetic myelin sheath-like structure and aligned fibrous niche

2020 ◽  
Vol 12 (3) ◽  
pp. 035013 ◽  
Author(s):  
Suping Chen ◽  
Chengheng Wu ◽  
Amin Liu ◽  
Dan Wei ◽  
Yun Xiao ◽  
...  
Keyword(s):  
Myelin Sheath ◽  
Nerve Fibers

scholarly journals P.058 Length dependent sensorimotor peripheral neuropathy often results in ventral abdominal sensory loss

2016 ◽  
Vol 43 (S2) ◽  
pp. S35-S35
Author(s):  
CB Gervais ◽  
MA Ross ◽  
BP Goodman ◽  
LA Angel ◽  
SE Benn
Keyword(s):  
Peripheral Neuropathy ◽  
Final Diagnosis ◽  
Nerve Fibers ◽  
Demographic Variables ◽  
The Body ◽  
Sensory Loss ◽  
Gender Ratio ◽  
Clinical Exam ◽  
Impairment Score ◽  
Sensory Fibers

Background: Length-Dependent Sensorimotor Peripheral Neuropathy (LDSMPN) affects the longest nerve fibers in the body. Less well-appreciated, and absent from the current literature, is that LDSMPN affecting thoracic segments gives rise to ventral abdominal sensory loss on clinical exam. Methods: Consecutive patients seen for LDSMPN (n=30) were evaluated prospectively for the presence or absence of ventral abdominal sensory loss. Demographic variables, symptoms, quantitative neurologic findings (Neuropathy Impairment Score [NIS]) and final diagnosis were examined using descriptive statistics. Results: Ventral abdominal sensory loss was documented in 20/30 LDSMPN patients (66.7%), mean age was 64.1 years (range 33-81), M:F gender ratio was 19:11, mean NIS was 21.4 (range 0-77). NCS/EMG abnormalities were found in 25/30 patients, with 5/30 having a clinical exam and/or other electrophysiological evidence convincing for LDSMPN. LDSMPN patients without ventral abdominal sensory loss (n=10) had a mean age of 61.2 (range 45-73), M:F of 7:3, and mean NIS of 20.9 (range 0-54). Conclusions: 1) Ventral abdominal sensory loss appears to be common in patients diagnosed with LDSMPN of a variety of causes; 2) in addition to those innervating distal limb territories, distal sensory fibers from the thoracic region represent another category of length dependent involvement in LDSMPN; 3) the clinical examination of LDSMPN should include the ventral abdomen.

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