scholarly journals Effect of Dawood Fasting on the Increased Level of Antioxidant Enzymes

2021 ◽  
Vol 9 (A) ◽  
pp. 1-6
Author(s):  
Utami Mulyaningrum ◽  
Anif Firrizki Muttaqina ◽  
Adhitama Noor Idninda ◽  
Ndilalah Pulungan ◽  
Irena Agustiningtyas ◽  
...  

AIM: The aim of this study is to provide a comparative histopathological evaluation of the regeneration of bone defect filling with perforated antibiotic-impregnated bone allograft. MATERIALS AND METHODS: Seventy-two healthy rabbits (24 rabbits in each group) were used for this study. Bone defects (3-mm diameter, 10-mm depth) were created in the femur. Human femoral head prepared according to the Marburg bone bank system was used as a bone allograft. The control group did not receive any filling. The experimental groups were as follows: Group 1 – the defects were filled with bone allografts and Group 2 – Perforated gentamycin-impregnated bone allografts. The animals were euthanized after 14, 30, and 60 days. Evaluations consisted of histology at 14-, 30-, and 60-days post-surgery. RESULTS: A mature bone formation in the group without a bone allograft occurred after 30 days and the group with an allograft after 14 days. In the groups with an allograft, a bone marrow defect was noted as complete closure after 30 days. Histomorphometric analysis showed that in the group with an antibiotic-impregnated bone, allograft leads to increased resorption of the allograft in the intramedullary space compared to group without antibiotic. CONCLUSION: We believe that a perforated allograft as a result of clinical trials may be obvious and economically affordable in the treatment of bone defects. The use of gentamycin-impregnated bone allografts may be of value in the prevention and treatment of bone infections.

2021 ◽  
Vol 9 (A) ◽  
pp. 12-18
Author(s):  
B. E. Tuleubaev ◽  
E. K. Kamyshansky ◽  
Saginova Dina Saginova ◽  
E. R. Tashmetov ◽  
A. A. Koshanova

AIM: The aim of this study is to provide a comparative histopathological evaluation of the regeneration of bone defect filling with perforated antibiotic-impregnated bone allograft. MATERIALS AND METHODS: Seventy-two healthy rabbits (24 rabbits in each group) were used for this study. Bone defects (3-mm diameter, 10-mm depth) were created in the femur. Human femoral head prepared according to the Marburg bone bank system was used as a bone allograft. The control group did not receive any filling. The experimental groups were as follows: Group 1 – the defects were filled with bone allografts and Group 2 – Perforated gentamycin-impregnated bone allografts. The animals were euthanized after 14, 30, and 60 days. Evaluations consisted of histology at 14-, 30-, and 60-days post-surgery. RESULTS: A mature bone formation in the group without a bone allograft occurred after 30 days and the group with an allograft after 14 days. In the groups with an allograft, a bone marrow defect was noted as complete closure after 30 days. Histomorphometric analysis showed that in the group with an antibiotic-impregnated bone, allograft leads to increased resorption of the allograft in the intramedullary space compared to group without antibiotic. CONCLUSION: We believe that a perforated allograft as a result of clinical trials may be obvious and economically affordable in the treatment of bone defects. The use of gentamycin-impregnated bone allografts may be of value in the prevention and treatment of bone infections.


Author(s):  
Sachiko Tobiume ◽  
Yoshio Kaji ◽  
Osamu Nakamura ◽  
Konosuke Yamaguchi ◽  
Kunihiko Oka ◽  
...  

Abstract Background Massive bone defects after wide resection of malignant bone tumors or a serious injury require treatment using vascularized bone grafts. Although cadaveric bone allografts combined with vascularized bone autografts are currently thought to be ideal in terms of size and durability, this treatment requires the scarification of healthy bone tissue. In a previous study, we attempted to improve this situation by prefabricating a vascularized bone allograft in recipient rats. In this study, we added vascular endothelial growth factor (VEGF)-containing hydroxyapatite/collagen composite (HAp/Col) to a prefabricated vascularized bone allograft to stimulate angiogenesis, which is known to be important for bone formation. Materials and Methods Sprague Dawley rats (n = 50) were used as donors and Wistar rats (n = 50) as recipients. All rats were 9 weeks old. The recipient rats were divided into five groups according to the use of vascular bundles, HAp/Col, and an additive substance (VEGF). The bone allografts collected from the donors were transplanted into the thigh region of the recipients, and a saphenous vein and 10 μg HAp/Col with VEGF were inserted into the bone allografts through the slit. After 4 weeks, the transplanted bone allografts were harvested, and histologic and genetic evaluations were performed in relation to bone formation and resorption. Results The results showed that, compared with the control group, the implantation of the vascular bundles and VEGF-containing HAp/Col significantly stimulated angiogenesis and bone formation in the rats with the bone allografts. However, histological and genetic evaluations of bone resorption revealed that resorption was not observed in any group. Conclusion These results suggest that VEGF-containing HAp/Col effectively stimulates angiogenesis and bone formation, but not bone resorption, in prefabricated vascularized bone allografts. This method could therefore become a useful tool for treating large bone defects.


2017 ◽  
Vol 34 (05) ◽  
pp. 307-314
Author(s):  
Ali Aliyev ◽  
Ömer Ekin ◽  
Ozan Bitik ◽  
Petek Korkusuz ◽  
Nilgün Yersal ◽  
...  

Background Reconstruction of craniofacial bone defects is a primary focus of craniofacial surgery. Although autogenous bone grafts remain as the gold standard, alloplastic materials have also gained widespread popularity due to their off-the-shelf availability, ease of use, and durability. In addition to replacing the missing bone, some of these alloplastic materials have also been found to induce new bone formation. Objectives In this study, the phenomenon of neo-osseous induction with bioactive glass was investigated for different implant-soft tissue configurations. Materials and Methods Thirty-two male, Wistar albino rats were divided into four equally numbered study groups. In group 1 (FP), adipofascial groin flaps were prefabricated with free periosteal grafts. In group 2 (FPB), adipofascial groin flaps were prefabricated with free periosteal grafts and bioactive glass. In group 3 (FB), adipofascial groin flaps were prefabricated with bioactive glass. In group 4 (control), adipofascial groin flaps were not prefabricated. Morphometric analyses of the prefabricated structures were performed using micro-CT. The histologic properties of the ectopic ossification were assessed by using a modified scoring system. Results Group 1 (FP) showed the greatest rate of mature lamellar bone formation. Group 2 (FBP) showed the greatest amount of bone density and volume. However, the addition of bioactive glass in group 2 (FBP) decreased the rate of mature lamellar bone formation when compared with group 1 (FP). Ectopic ossification was not observed in the control group. Conclusion Bioactive glass can be successfully used in the prefabrication of vascularized compound structures for the reconstruction of complex bone defects. However, interference with the periosteal induction of mature lamellar bone formation should be taken into consideration, especially in pediatric bone defects, which primarily rely on spontaneous osteogenesis through periosteal induction.


2021 ◽  
Vol 6 (1) ◽  
pp. 9-13
Author(s):  
Cynthia Chemaly ◽  
◽  
Mireille Kallassi ◽  
Rawad Samaran ◽  
Roy Abou Fadel ◽  
...  

Background: Chitosan is a natural biopolymer that has gained a special interest in bone regeneration in recent years. Objective: The objective of this study is to show the bone formation obtained following a transplantation of sponges of chitosan alone, chitosan combined with chondroitin sulfate or chitosan combined with chondroitin sulfate and collagen, in rat critical calvarial bone defects. Material and Methods: 12 Wistar rats were divided into 4 groups of 3 rats each. Critically sized bone defects were made in calvaria, and grafted by sponges of:collagen / chitosan / chondroitin (group 1), chitosan (group 2), chitosan / chondroitin sulfate (group3). Bone defects of group 4 remained empty for control. The animals were sacrificed 12 weeks after the surgery. Results: Histological analysis showed the formation of lamellar bone in the chitosan group. In the chitosan / chondroitin sulfate group, formation of a less mature bone than that of the chitosan group was also observed. However, the least bone formation was observed in the collagen / chitosan / chondroitin sulfate group. Histological sections showed the presence of fibrous tissue. The results for this group are similar to the control group. In groups 2 and 3, the materials appear completely resorbed while in group 1 the resorption of the matrix was incomplete. Conclusion: Despite the size of the sample, this study has shown that chitosan alone or in combination with chondroitin sulfate promotes bone formation. On the other hand, the combination chitosan / chondroitin sulfate / collagen showed a negative result.


2019 ◽  
Vol 20 (1) ◽  
pp. 12-18
Author(s):  
Sameh El-Nabtity

The present study aimed to investigate the prophylactic effect of Cymbopogon proximus and Alhagi maurorum on Sulfadimidine induced urolithiasis in rabbits . Thirty New Zealand male rabbits were allocated into six equal groups (each of five): Group (1) was used as a negative control. Group(2) were administered sulfadimidine (200mg/kg) by intramuscular injection.Groups(3) and (4) were administered sulfadimidine(200mg/kg) by intramuscular injection and 330mg/kg of Cymbopogon proximus alcoholic and aqueous extracts respectively orally.Groups(5) and (6) were administered sulfadimidine(200mg/kg) by intramuscular injection and 400mg/kg of Alhagi maurorum alcoholic and aqueous extracts respectively orally. The period of experiment was 10 days. Blood and urine samples were collected from rabbits on the 10th day. The results recorded a significant decrease in serum creatinine, urea, uric acid and crystalluria in Cymbopogon proximus and Alhagi maurorum groups compared to sulfadimidine treated group.We conclude that Cymbopogon proximus and Alhagi maurorum have a nephroprotective and antiurolithiatic effects against sulfadimidine induced crystalluria.


2021 ◽  
Vol 14 (1) ◽  
pp. 656-664
Author(s):  
I.R. Volchkova ◽  
A.V. Yumashev ◽  
V.V. Borisov ◽  
V.I. Doroshina ◽  
E.A. Kristal ◽  
...  

Introduction: Removable dentures are used by 20% of the population. These may be accompanied by denture stomatitis in 15-70% of patients. The choice of the optimal cleansing agent for removable dental prostheses is of high significance. Aim: The aim of our research was to study the influence of removable denture cleansing products on the adhesion of microorganisms and yeast. Materials and Methods: We manufactured 144 specimens of standardized round shape with a diameter of 10 mm from 4 types of modern polymeric materials used by prosthetic dentistry to produce removable dentures, 12 specimens of each material were placed into suspensions of bacterial cultures of Staphylococcus aureus, Escherichia coli, Candida albicans, then into “ClearaSept” (Test group 1), “Рrotefix active cleanser” (Test group 2), saline solution (Control group), followed by nutrient media. The adhesion index was calculated and analyzed. Results: There was no reliable lowering of adhesion index of Staphylococcus Aureus to all materials detected in Test group 1 (U=6, p>0.05 for Bio XS; U=8, p>0.05 for Dental D, Denotokeep Peek, Vertex Rapid Simplified). In Test group 2, the adhesion index of Staphylococcus Aureus reliably decreased to all materials compared to the Control group (U=0, p≤0.01). The adhesion index of Candida albicans and Escherichia coli to all materials in Test group 1 had a minor to moderate reliable reduction compared to the Control group (U=0, p≤0.01). Test group 2 showed a significant reliable decrease in Candida albicans and Escherichia coli adhesion index to all materials in comparison with the Control group (U=0, p≤0.01). Conclusion: The research showed an unreliable or minor and moderate reliable decrease in microorganisms adhesion index depending on the microorganism species after treatment of denture material specimens by antibacterial soap “ClearaSept” and a reliable significant decrease in microbial and yeast adhesion after application of Protefix active cleaner solution, which demonstrates a more significant antimicrobial effect in comparison to “ClearaSept” against Staphylococcus aureus, Escherichia coli, and Candida albicans.


Pituitary ◽  
2021 ◽  
Author(s):  
Muhammad Fahad Arshad ◽  
Oluwafunto Ogunleye ◽  
Richard Ross ◽  
Miguel Debono

Abstract Purpose There is no consensus on quality of life (QOL) in patients with acromegaly requiring medical treatment after surgery compared with those achieving remission by surgery alone. Methods QuaLAT is a cross-sectional study comparing QOL in surgery-only treated acromegaly patients versus those requiring medical treatment post-surgery. Patients attending clinics were identified and divided into—Group 1: patients who had surgery only and were in biochemical remission, Group 2: all patients on medical treatment post-surgery, Group 3: patients from Group 2 with biochemical control. Participants were asked to fill three questionnaires; Acromegaly Quality of Life Questionnaire (ACROQOL), 36-Item Short Form Survey (SF36), and Fatigue Severity Scale (FSS). Results There were 32 patients in Group 1 and 25 in Group 2. There was no difference in QOL scores between groups 1 and 2, as measured by ACROQOL (mean difference [MD] = − 2.5, 95% CI − 16.6 to 11.6; p = 0.72), SF36v2 [Physical component score (PCS) MD = − 4.9, 95% CI − 10.9 to 1.2; p = 0.12; mental component score MD = − 3.0, 95% CI − 10.5 to 4.4; p = 0.44], or FSS (MD = − 0.004, 95% CI − 1.14 to 1.33; p = 0.1). Comparison between groups 1 and 3 however showed that PCS (and 3 subdomains) was significantly better in group 3 (MD = − 8.3, 95% CI − 14.8 to -1.8; p = 0.01). All three QOL scores were lower when compared with healthy controls. Conclusions Medical treatment not only achieves a QOL comparable to surgery, it may also be associated with better QOL in physical subdomains. When compared with healthy controls, QOL remains worse in treated acromegaly patients compared to controls.


2003 ◽  
Vol 284 (2) ◽  
pp. H668-H675 ◽  
Author(s):  
Jorge A. Guzman ◽  
Ariosto E. Rosado ◽  
James A. Kruse

Effects of a dopamine-1 (DA-1) receptor agonist on systemic and intestinal oxygen delivery (D˙o 2)-uptake relationships were studied in anesthetized dogs during sequential hemorrhage. Control ( group 1) and experimental animals ( group 2) were treated similarly except for the addition of fenoldopam (1.0 μg · kg−1 · min−1) in group 2. Both groups had comparable systemic criticalD˙o 2(D˙o 2crit), but animals in group 2 had a higher gut D˙o 2crit(1.12 ± 1.13 vs. 0.80 ± 0.09 ml · kg−1 · min−1, P < 0.05). At the mucosal level, a clear biphasic delivery-uptake relationship was not observed in group 1; thus oxygen consumption by the mucosa may be supply dependent under physiological conditions. Group 2 demonstrated higher peak mucosal blood flow and lack of supply dependency at higher mucosalD˙o 2 levels. Fenoldopam resulted in a more conspicuous biphasic relationship at the mucosa and a rightward shift of overall splanchnic D˙o 2crit despite increased splanchnic blood flow. These findings suggest that DA-1 receptor stimulation results in increased gut perfusion heterogeneity and maldistribution of perfusion, resulting in increased susceptibility to ischemia.


Author(s):  
М.А. Быковская ◽  
А.А. Раскуражев ◽  
А.А. Шабалина ◽  
К.В. Антонова ◽  
М.М. Танашян

Введение. Сосудистые осложнения сахарного диабета (СД) являются одной из ведущих причин повышения смертности пациентов трудоспособного возраста. Предполагается, что индуцированный гипергликемией окислительный стресс и нарушение антиоксидантной защиты играют роль в патологическом механизме повреждения сосудов, частично за счет влияния оксида азота (NО). Цель исследования: уточнение взаимосвязей в системах асимметричного диметиларгинина (АДМА) и NO у пациентов с цереброваскулярными заболеваниями (ЦВЗ) на фоне СД 2-го типа (СД-2). Материалы и методы. Обследованы 72 пациента с ЦВЗ со стенозирующим поражением внутренней сонной артерии вне острого периода: группу 1 составили 39 пациентов (18 мужчин и 21 женщина) с СД-2 в возрасте 65 [58; 72] лет; в группу 2 вошли 33 больных (15 мужчин и 18 женщин) без СД-2 в возрасте 66 [56; 74] лет. Контрольную группу составили 30 добровольцев (16 мужчин и 14 женщин) без проявлений церебральной ишемии и нарушений углеводного обмена, с нормальными значениями индекса массы тела, некурящие, в возрасте 62 [50; 66] лет. Проводилось клиническое обследование, нейро- и ангиовизуализационное исследование, спектр биохимических исследований крови, в том числе определение содержания АДМА и показателей системы NO. Результаты. В группе 1 содержание нитрата, нитрита и NO составило 62,1 [56; 68] мкмоль/л, 48,5 [26; 52] мкмоль/л и 13,6 [9; 23] мкмоль/л соответственно, что достоверно отличалось от значений этих показателей в группе 2 — 58,3 [45; 64] мкмоль/л, 39,6 [26,0; 42,3] мкмоль/л и 18,7 [16,1; 24,7] мкмоль/л соответственно. Отмечен также более высокий уровень AДМА в крови у пациентов с ЦВЗ в сочетании с СД-2 — 0,42 [0,21; 0,53] ммоль/л. Заключение. Обнаружена взаимосвязь между уровнями AДМА и NO при ЦВЗ на фоне СД-2. Это требует продолжения исследований биомаркеров повреждения сосудистой стенки для определения их места в патогенезе ишемических церебральных осложнений СД-2. Background. Vascular complications of diabetes mellitus (DM) are one of the leading causes of increased mortality in patients of employable age. Hyperglycemia-induced oxidative stress and impaired antioxidant protection have been suggested to play a role in the pathological mechanism of vascular damage, in part due to the effects of nitric oxide (NO). Objectives: clarification of relationships in the systems of asymmetric dimethylarginine (ADMA) and NO in patients with cerebrovascular diseases (CVD) and type 2 diabetes (DM-2). Patients/Methods. We examined 72 CVD patients with stenosing lesions of the internal carotid artery outside the acute period: group 1 consisted of 39 patients (18 men and 21 women; 65 [58; 72] years old) with DM-2; group 2 consisted of 33 patients (15 men and 18 women; 66 [56; 74] years old) without DM-2. The control group consisted of 30 volunteers (16 men and 14 women; 62 [50; 66] years old) without manifestations of cerebral ischemia and carbohydrate metabolism disorders, with normal body mass index, non-smokers. A clinical examination, neuro- and angio-imaging study, a spectrum of biochemical blood tests, including the concentration of asymmetric dimethylarginine (ADMA) and indicators of NO system were carried out. Results. In group 1, the content of nitrate, nitrite and NO was 62.1 [56; 68] μmol/l, 48.5 [26; 52] μmol/l and 13.6 [9; 23] μmol/l, respectively, that significantly differed from the content of these parameters in group 2 — 58.3 [45; 64] μmol/l, 39.6 [26.0; 42.3] μmol/l and 18.7 [16.1; 24.7] μmol/l, respectively. Noted also a higher blood level of ADMA in patients with CVD combined with DM-2 — 0.42 [0.21; 0.53] mmol/l. Conclusions. A relationship was found between ADMA and NO levels in CVD patients with DM-2. This requires further studies of biomarkers of vascular wall damage to determine their place in the pathogenesis of ischemic cerebral complications of DM-2.


2018 ◽  
Vol 4 (1) ◽  
pp. e000446 ◽  
Author(s):  
Gafin Ericson Morgan ◽  
Rhodri Martin ◽  
Lisa Williams ◽  
Owen Pearce ◽  
Keith Morris

ObjectivesThe aim of this study was to establish quantitative values for asymptomatic and symptomatic Achilles tendons.DesignCohort study with a single (cross-sectional) time point of patients diagnosed with unilateral Achilles tendinopathy and an asymptomatic group with comparative homogeneity.MethodsA sample of 50 participants: 25 diagnosed with symptomatic unilateral Achilles tendinopathy (AT group) and 25 with asymptomatic Achilles tendons (control group 2). The asymptomatic side of the AT group was used as a control (control group 1). Measurements at 2 cm intervals on the tendon from its insertion at the calcaneum up to the musculotendinous junction were taken non-weight bearing (NWB) and weight bearing (WB) using the MyotonPRO.ResultsThere was a significant (p<0.005) decrease in natural oscillation frequency (F) at points 2, 3 and 4 of the AT group (NWB condition) and points 2 and 3 for the WB condition. There was a significant (p<0.005) increase in logarithmic decrement (D) at points 2 and 3 signifying a decrease in elasticity. Dynamic stiffness (S) was significantly (p<0.005) reduced in the AT group at points 2 and 3 WB and point 3 WB. There was no significant difference in creep (C) observed between the symptomatic and asymptomatic tendons. There was a significant (p<0.005) increase in mechanical stress relaxation time (R) at point 2 NWB.There was a correlation between body weight and gender on tendon mechanics, with the symptomatic tendons. No significant differences were observed between the control group 1 and control group 2.ConclusionsThe MyotonPRO measured decreased stiffness over a section of the tendon corresponding clinically with Achilles tendinopathy. This may have potential in identifying risk of injury and informing rehabilitation, however further extensive research is required to generate baseline data for specific population groups monitoring variables over time. Age, gender and body mass index appear to have some bearing on the mechanical properties of the tendon but mainly in the tendinopathy group.


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