scholarly journals Effects of intermittent negative pressure treatment on circulating vascular biomarkers in patients with intermittent claudication

2021 ◽  
pp. 1358863X2110079
Author(s):  
Henrik Hoel ◽  
Erik Mulder Pettersen ◽  
Lars Øivind Høiseth ◽  
Iacob Mathiesen ◽  
Arne Seternes ◽  
...  
Keyword(s):  
Treatment Group ◽  
Intermittent Claudication ◽  
Adhesion Molecule ◽  
Negative Pressure ◽  
Venous Blood ◽  
Endothelial Activation ◽  
Control Group ◽  
Sham Control ◽  
Sham Control Group ◽  
Vascular Biomarkers

The aim of this study was to investigate the effects of lower extremity intermittent negative pressure (INP) treatment for 1 hour twice daily for 12 weeks, on circulating vascular biomarkers in patients with intermittent claudication. Patients were randomized to treatment with –40 mmHg INP (treatment group), or –10 mmHg INP (sham control group). Venous blood samples were collected at baseline and after 12 weeks, and concentrations of vascular adhesion molecule-1 (VCAM-1), intracellular adhesion molecule-1 (ICAM-1), E-selectin, P-selectin, von Willebrand factor (vWF), l-arginine, asymmetric dimethylarginine (ADMA), and symmetric dimethylarginine (SDMA) were analyzed. A larger proportion of the patients in the treatment group (25/31) had a reduction in vWF levels after 12 weeks, compared to the sham control group (17/30) ( p = 0.043). Within the treatment group there was a significant mean (SEM) reduction in the concentration of vWF of –11% (4) ( p = 0.019), whereas there was no significant change in the levels of vWF in the sham control group (1% (6); p = 0.85). There were no significant differences in the change of any of the biomarker levels between the groups after 12 weeks of treatment. In conclusion, there were no differences in the change of the circulating levels of the measured biomarkers between the treatment group and the sham control group after 12 weeks of INP treatment. However, the observed changes in vWF might indicate a beneficial effect of INP treatment on endothelial activation and endothelial injury. Clinicaltrials.gov Identifier: NCT03640676

LOX-1 inhibition in myocardial ischemia-reperfusion injury: modulation of MMP-1 and inflammation

2002 ◽  
Vol 283 (5) ◽  
pp. H1795-H1801 ◽  
Author(s):  
Dayuan Li ◽  
Victor Williams ◽  
Ling Liu ◽  
Hongjiang Chen ◽  
Tatsuya Sawamura ◽  
...  
Keyword(s):  
Myocardial Ischemia ◽  
P38 Mapk ◽  
Adhesion Molecule ◽  
Ischemia Reperfusion ◽  
Control Group ◽  
Adhesion Molecule Expression ◽  
Sham Control ◽  
Mapk Activation ◽  
Sham Control Group ◽  
Myocardial Ischemia Reperfusion

A recently identified lectin-like oxidized low-density lipoprotein receptor (LOX-1) mediates endothelial cell injury and facilitates inflammatory cell adhesion. We studied the role of LOX-1 in myocardial ischemia-reperfusion (I/R) injury. Anesthetized Sprague-Dawley rats were subjected to 60 min of left coronary artery (LCA) ligation, followed by 60 min of reperfusion. Rats were treated with saline, LOX-1 blocking antibody JXT21 (10 mg/kg), or nonspecific anti-goat IgG (10 mg/kg) before I/R. Ten other rats underwent surgery without LCA ligation and served as a sham control group. LOX-1 expression was markedly increased during I/R ( P < 0.01 vs. sham control group). Simultaneously, the expression of matrix metalloproteinase-1 (MMP-1) and adhesion molecules (P-selectin, VCAM-1, and ICAM-1) was also increased in the I/R area ( P < 0.01 vs. sham control group). There was intense leukocyte accumulation in the I/R area in the saline-treated group. Treatment of rats with the LOX-1 antibody prevented I/R-induced upregulation of LOX-1 and reduced MMP-1 and adhesion molecule expression as well as leukocyte recruitment. LOX-1 antibody, but not nonspecific IgG, also reduced myocardial infarct size ( P < 0.01 vs. saline-treated I/R group). To explore the link between LOX-1 and adhesion molecule expression, we measured expression of oxidative stress-sensitive p38 mitogen-activated protein kinase (p38 MAPK). The activity of p38 MAPK was increased during I/R ( P < 0.01 vs. sham control), and use of LOX-1 antibody inhibited p38 MAPK activation ( P < 0.01). These findings indicate that myocardial I/R upregulates LOX-1 expression, which through p38 MAPK activation increases the expression of MMP-1 and adhesion molecules. Inhibition of LOX-1 exerts an important protective effect against myocardial I/R injury.

scholarly journals Sustained Tau Phosphorylation and Microglial Activation Following Repetitive Traumatic Brain Injury

2020 ◽  
Vol 8 (A) ◽  
pp. 837-840
Author(s):  
Andre Marolop Pangihutan Siahaan ◽  
Rr Suzy Indharty ◽  
Jessy Chrestella ◽  
Wismaji Sadewo ◽  
Steven Tandean ◽  
...  
Keyword(s):  
Traumatic Brain Injury ◽  
Brain Injury ◽  
Treatment Group ◽  
Microglial Activation ◽  
Control Group ◽  
Sprague Dawley ◽  
Sham Control ◽  
Treatment Groups ◽  
Sham Control Group ◽  
Cd 68

BACKGROUND: Repetitive traumatic brain injury (TBI), even without acute sequela, can induce a delayed neurodegenerative with overexpression of phosphorylated tau (p-tau) as hallmark, caused by chronic inflammation mediated in part by microglial activation. AIM: The aim of this study was to examine the dynamics of p-tau accumulation and microglial activation following repetitive TBI. MATERIALS AND METHODS: Thirty Sprague–Dawley rats were randomized into a sham control group and two treatment groups receiving three successive closed-skull impacts (TBI model) from a 40-g mass dropped from a 1-m height on alternating days (days 0, 1, 3, and 7). The first treatment group was sacrificed on the last day of trauma and the second treatment group after 7 days of no trauma. The expression level of p-tau was evaluated by AT-8 antibody immunostaining and microglial activation by anti-CD-68 immunostaining. RESULTS: Immunoexpression of AT-8 was significantly elevated 7 days after TBI compared to the last day of trauma and compared to the sham control group, while CD-68 expression was significantly higher than sham controls on the last day of trauma and remained elevated for 7 days without trauma. CONCLUSION: The study showed that brain trauma can induce p-tau overexpression and microglial activation that is sustained during the non-trauma period.

scholarly journals Five Different Noise Intensities Robustly Affects Corticosterone, Gastrin and Endothelin-1 Responses and Initiated Gastric Tissue Damage in Wistar Rats

2021 ◽  
pp. 54-69
Author(s):  
Ravinder Kumar Mehra ◽  
Mahesh Prashad ◽  
Dinesh Kumar Sharma ◽  
Prevesh Kumar
Keyword(s):  
Stress Response ◽  
Tissue Damage ◽  
Biological Systems ◽  
Gastric Damage ◽  
Control Group ◽  
Stress Exposure ◽  
Sham Control ◽  
Endothelin 1 ◽  
Noise Stress ◽  
Sham Control Group

Likewise other stress response noise stress is also affects the homeostasis of the biological systems and produce stress response in the form of Corticosterone to prevent the damage but if the exposure is longer with higher magnitude it may disrupt the robust ability of the homeostasis and could produce the damage to the biological systems. The goal of our study was to see how five different noise intensities affected stomach tissue damage. 42 healthy rats were divided into five different stress exposure group, normal control (NC) and sham control (SC) groups. Noise stress exposure was delivered for 1 hour per day continued for 30 days in all five noise exposed groups by specially designed noise chamber whereas sham control group of animals kept in noise chamber for 1 hour per day continued for 30 days without noise stress exposure and control group of animals neither exposed to noise stress of any intensities and nor kept in noise chamber without noise but remain in the same experimental room in their homecage for 30 days respectively. Results of the study showed that animals exposed to 60 and 80 dB noise give habituated and not significant Corticosterone, Gastrin and Endothelin-1 responses compared to NC and SC groups while animals exposed to 100, 120 and 140 dB had significantly higher Corticosterone, Gastrin and Endothelin-1 response and also chronic gastric damage was observed compared to later two noise exposed groups respectively. Study concluded that not only higher but also lower noise intensities also initiated the gastric damage even after the adaptation.

P4583Effect of permanent right internal mammary artery occlusion on right coronary artery collateral function. a randomized controlled trial

2019 ◽  
Vol 40 (Supplement_1) ◽  
Author(s):  
M R Bigler ◽  
M Stoller ◽  
C Tschannen ◽  
R Grossenbacher ◽  
C Seiler
Keyword(s):  
Coronary Artery ◽  
Angina Pectoris ◽  
Right Coronary Artery ◽  
Study Endpoint ◽  
Control Group ◽  
Sham Control ◽  
Randomized Controlled ◽  
Internal Mammary ◽  
Sham Control Group

Abstract Background Extracardiac coronary artery supply via the pericardiophrenic branch of the internal mammary arteries (IMA) has been well documented anatomically. Recently, a proof-of-concept study has found functional relevance of these anastomoses in patients with coronary artery disease (CAD) during a brief right coronary artery (RCA) occlusion. Purpose The aim of the present randomized controlled, single-blind trial was to investigate the effect of permanent right IMA (RIMA) occlusion on RCA collateral flow index (CFI) and on the occurrence of angina pectoris. We hypothesized that the change in RCA CFI from baseline to follow-up examination is higher in the group of patients with than without permanent RIMA occlusion. Methods One hundred patients with CAD were randomly allocated (1:1) to permanent RIMA device occlusion at baseline or to no RIMA occlusion (sham control group). The primary study endpoint was CFI change in the RCA from baseline to the 6-week follow-up examination. CFI is the ratio between mean coronary occlusive and aortic pressure both subtracted by central venous pressure as obtained during a 1-minute proximal RCA balloon occlusion. RCA CFI was measured at baseline before RIMA occlusion or the sham procedure and at the follow-up invasive exam. At the end of the same occlusion, occurrence of angina pectoris was assessed. Percutaneous coronary intervention (PCI) of the RCA was deferred until after follow-up RCA CFI measurement. Results There were 51 patients in the RIMA occlusion (verum) group and 49 patients in the sham control group. PCI in the left coronary territory was performed at baseline for clinical reasons in 27 patients of the verum group and in 25 patients of the sham control group. There were no differences in clinical characteristics at baseline between the groups (age 68±12 years, 88 men). RCA CFI change during the 6 weeks of follow-up was equal to +0.028±0.077 in the verum group and −0.026±0.079 in the sham control group (p=0.0017). Angina pectoris during CFI measurement had disappeared at follow-up exam in 30% of the verum group and in 2% of the sham control group (p=0.0013). Conclusions Right coronary collateral function is augmented 6 weeks after permanent RIMA occlusion when compared to sham treatment. This manifests as less frequent angina pectoris during myocardial ischemia among patients with RIMA occlusion. Acknowledgement/Funding This study was supported by a grant from the Swiss National Science Foundation for Research (grant #32003B_163256/1 to CS).

Increased Pinch Strength in Acute and Subacute Stroke Patients After Simultaneous Median and Ulnar Sensory Stimulation

2008 ◽  
Vol 23 (4) ◽  
pp. 351-356 ◽  
Author(s):  
Akkarapol Klaiput ◽  
Wasuwat Kitisomprayoonkul
Keyword(s):  
Sensory Stimulation ◽  
Pinch Strength ◽  
Control Group ◽  
Stroke Patients ◽  
Control Groups ◽  
Sham Control ◽  
Subacute Stroke ◽  
Sham Control Group ◽  
Peripheral Sensory ◽  
Stimulation Group

Background. Peripheral nerve stimulation may induce cortical adaptations as it improves pinch strength in chronic stroke patients immediately after stimulation. Objective. Test the effects of peripheral sensory stimulation on pinch strength in patients with acute and subacute stroke. Methods. Stroke patients (N = 20) who had onset less than 6 months previously and could voluntarily pinch the thumb to the index finger participated in a randomized, single-blinded, controlled study. Ten patients received 2 hours of simultaneous electrical stimulation over the median and ulnar nerves at the wrist to the level of appreciating paresthesias (peripheral sensory stimulation group). Ten control patients received stimulation to the level of perception (sham-control group). Pinch strength of the thumb pad to tip and to lateral side of the index finger of the paretic hand and the Action Research Arm test were tested before and immediately after the stimulation. Results. Lateral and tip pinch strength were significantly increased in both groups ( P < .05). Mean ± SD of increased lateral pinch strength of peripheral sensory stimulation and sham-control groups were 1.24 ± 0.54 pounds and 0.20 ± 0.28 pounds, respectively. Mean ± SD of increased tip pinch strength of peripheral sensory stimulation and sham-control groups were 1.00 ± 0.72 pounds and 0.37 ± 0.36 pounds, respectively. Increase pinch strength of the peripheral sensory stimulation group was greater than the sham-control group, with significant difference ( P < .05). The Action Research Arm test was not significantly changed after stimulation in both groups ( P > .05). Conclusion. Peripheral sensory stimulation of the paretic hand may increase pinch strength of acute and subacute stroke patients immediately after stimulation.

scholarly journals To investigate the clinical effect of modified closed negative pressure suction technique combined with flap transplantation on the treatment of deep chronic refractory wounds

2019 ◽  
Vol 6 (1) ◽  
pp. 11
Author(s):  
Zhihui Hou ◽  
Mingjuan Gu
Keyword(s):  
Treatment Group ◽  
Negative Pressure ◽  
Clinical Effect ◽  
Random Number ◽  
Good Effect ◽  
Control Group ◽  
Flap Reconstruction ◽  
Random Number Table ◽  
Research Objects ◽  
Pressure Suction

Objective: To investigate the clinical effect of modified closed negative pressure suction technique combined with flap transplantation on the treatment of deep chronic refractory wounds.Methods: During March of 2015 to April of 2018, 52 cases of patients with deep chronic refractory wounds were selected as research objects. They were divided into the control group and the treatment group by use of the random number table method, with 26 cases in each group. Among them, the control group was given conventional debridement combined with flap reconstruction, and the treatment group was treated with modified closed negative pressure suction technique combined with flap transplantation to observe the clinical effect.Results: (1) According to the analysis on the effect of flap transplantation, the excellent and good rate of the treatment group was 92.3%, and in the control group, it was 76.9% (p < .05). (2) According to the statistics, the incidence of complications in the treatment group was lower than that in the control group (p < .05).Conclusions: Modified closed negative pressure suction technique combined with flap transplantation has a good effect on the treatment of deep chronic refractory wounds with fewer complications.

Evaluation of plasma PDGF and VEGF levels after systemic administration of activated autologous platelet-rich plasma

Biomedicine ◽  
2021 ◽  
Vol 41 (2) ◽  
pp. 409-412
Author(s):  
Karina Karina ◽  
Krista Ekaputri ◽  
Johannes Albert Biben ◽  
Imam Rosadi ◽  
Iis Rosliana ◽  
...  
Keyword(s):  
Growth Factor ◽  
Treatment Group ◽  
Platelet Rich Plasma ◽  
Chemical Activation ◽  
Venous Blood ◽  
Enzyme Linked Immunosorbent Assay ◽  
Control Group ◽  
Prior History ◽  
Autologous Platelet Rich Plasma ◽  
Autologous Platelet

Introduction and Aim: Activated autologous platelet-rich plasma (aaPRP) is becoming a popular therapy to accelerate healing in the field of plastic surgery. Platelets, which are abundant in aaPRP, can release many growth factors including platelet-derived growth factor (PDGF) and vascular endothelial growth factor (VEGF). This study aims to examine the plasma levels of PDGF and VEGF in healthy subjects after intravenous administration of aaPRP.   Materials and Methods: Nine healthy patients with no prior history of metabolic disease were divided into two groups (control and experiment group). The treatment group which consists of six patients received intravenous aaPRP treatment. The preparation of aaPRP starts with the collection of 24 mL of whole blood in sodium citrate tubes followed a two-step centrifugation procedure and subsequent chemical activation. aaPRP was then administered intravenously to patients. Meanwhile, the control group received no intervention. Venous blood samples were taken before and one week after the treatment and the plasma PDGF and VEGF levels were determined by enzyme-linked immunosorbent assay (ELISA).   Results: The treatment group showed statistically significant increase in VEGF after 7 days compared to before aaPRP administration. However, the change in PDGF levels of the treatment group was unnotable.   Conclusion: The present findings indicate that intravenous administrations of activated aaPRP may increase plasma VEGF level up to 1 week after aaPRP administration.

scholarly journals Protection against Amoebic Liver Abscess in Hamster by Intramuscular Immunization with anAutographa californicaBaculovirus Driving the Expression of the Gal-Lectin LC3 Fragment

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Dulce María Meneses-Ruiz ◽  
Hugo Aguilar-Diaz ◽  
Raúl José Bobes ◽  
Alicia Sampieri ◽  
Luis Vaca ◽  
...  
Keyword(s):  
Protective Antigen ◽  
Oral Immunization ◽  
Autographa Californica ◽  
Amoebic Liver Abscess ◽  
Control Group ◽  
Sham Control ◽  
Th2 Cytokine ◽  
Sham Control Group ◽  
Baculovirus System ◽  
Humoral Responses

In a previous study, we demonstrated that oral immunization usingAutographa californicabaculovirus driving the expression of the Gal-lectin LC3 fragment (AcNPV-LC3) ofEntamoeba histolyticaconferred protection against ALA development in hamsters. In this study, we determined the ability of AcNPV-LC3 to protect against ALA by the intramuscular route as well as the liver immune response associated with protection. Results showed that 55% of hamsters IM immunized with AcNPV-LC3 showed sterile protection against ALA, whereas other 20% showed reduction in the size and extent of abscesses, resulting in some protection in 75% of animals compared to the sham control group. Levels of protection showed a linear correlation with the development and intensity of specific antiamoeba cellular and humoral responses, evaluated in serum and spleen of hamsters, respectively. Evaluation of the Th1/Th2 cytokine patterns expressed in the liver of hamsters showed that sterile protection was associated with the production of high levels of IFNγand IL-4. These results suggest that the baculovirus system is equally efficient by the intramuscular as well as the oral routes for ALA protection and that the Gal-lectin LC3 fragment is a highly protective antigen against hepatic amoebiasis through the local induction of IFNγand IL-4.

scholarly journals Electro-acupuncture for central obesity: randomized, patient-assessor blinded, sham-controlled clinical trial protocol

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Linda L. D. Zhong ◽  
Xingyao Wu ◽  
Tsz Fung Lam ◽  
Ying Ping Wong ◽  
Peihua Cao ◽  
...  
Keyword(s):  
Clinical Trial ◽  
Central Obesity ◽  
Medical Condition ◽  
The Body ◽  
Control Group ◽  
Controlled Clinical Trial ◽  
Hip Circumference ◽  
Sham Control ◽  
Sham Control Group

Abstract Background Obesity is a common medical condition. Among all the classifications of obesity, central obesity is considered to be a significant threat on the health of individuals. Scientific researches have demonstrated that the accumulation of intra-abdominal fat is associated with higher metabolic and cardiovascular disease risks independently from Body Mass Index (BMI). Our previous research found that the combination of electro-acupuncture and auricular acupressure could significantly reduce the body weight and the BMI compared to sham control group. Methods/design This is a patient-assessor blinded, randomized, sham-controlled clinical trial on electro-acupuncture for central obesity. One hundred sixty-eight participants with central obesity will be randomly assigned to two groups, which are the acupuncture group and the sham control group. The whole study duration will be 8-week treatment plus 8-week follow up. The primary outcome is the change in waist circumference before and after the treatment. The secondary outcomes include the changes in hip circumference, waist-to-hip circumference ratio, BMI and body fat percentage during the treatment and follow-up. Conclusion The trial will evaluate the efficacy and safety of electro-acupuncture for central obesity compared with sham acupuncture. The study may provide the solid evidence of electro-acupuncture on central obesity in Hong Kong. Trial registration ClinicalTrials.gov Identifier: NCT03815253,Registered 24 Jan 2019.

scholarly journals Antioxidant and Anti-Inflammatory Effects of Origanum majorana L. Methanolic Extract on Bile Duct Ligation in Male Rats

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Izadpanah Gheitasi ◽  
Nikta Motaghi ◽  
Hossein Sadeghi ◽  
Heibatollah Sadeghi ◽  
Zahra Moslemi ◽  
...  
Keyword(s):  
Bile Duct ◽  
Bile Duct Ligation ◽  
Methanolic Extract ◽  
Control Group ◽  
Histopathological Changes ◽  
Sham Control ◽  
Duct Ligation ◽  
Tnf Α ◽  
Sham Control Group ◽  
Origanum Majorana

Introduction. Cholestasis is caused by malfunction of the hepatobiliary system. This disorder is the result of the accumulation of bile fatty acids and other toxins in the liver. The aim of the current study was to investigate the antioxidative and hepatoprotective effects of methanolic extract of Origanum majorana L. (OM) on hepatic disorder and tissue damage induced by bile duct ligation (BDL) in rats. Materials and methods. Twenty-eight male Wistar rats were randomly divided into 4 groups including sham control group received vehicle (SC-V), bile duct ligation received vehicle (BDL-V), bile duct ligation group received OM extract (BDL + OM), and sham control group received OM extract (SC + OM). One day after surgery, the animals received vehicle or methanolic extract of OM 300 mg/kg/day for 7 consecutive days by oral gavage. Finally, the animals were anesthetized and the blood samples were collected from each animal. After sacrificing of animals, liver tissue from each rat was removed and divided into three parts: one part was used for preparing of homogenized tissue, one part was fixed in 10% neutral formalin for histopathology examination, and the third part was kept in liquid nitrogen for gene expression analysis. Biomarkers of oxidative stress in the liver tissue and serum, as well as histopathological changes of the liver, were assessed. Also, the gene expression of IL-1, TNF-α, TGF-β, and α-SMA has been measured. Results. The results showed that BDL-V significantly increased the activity of ALT, AST, ALP, and total bilirubin compared to the SC-V group. The oxidative stress markers such as MDA and FRAP significantly increased due to BDL, while the CAT activity reduced in the BDL-V group compared to SC-V group. Oral treatment with OM reduced ALT and AST activity, although it was not statistically significant. OM treatment considerably increased the activity of CAT compared to BDL group. BDL-V induced a significant histological change in the liver, while treatment with OM at a dose of 300 mg/kg showed a minor effect on histopathological changes. In addition, the mRNA of IL-1, TNF-α, TGF-β, and α-SMA significantly increased in the BDL-V group, while treatment with OM only significantly reduced TGF-β in comparison with BDL-V rats. Conclusions. The results of the present study showed that oral administration of OM extract had a moderate protective effect on cholestasis due to BDL. Indeed, more studies with different doses of extract are needed to confirm this finding.

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