Plasma Total Thiol Research Articles

Investigation of Thiol/Disulfide Homeostasis and Clinical Parameters in Rosacea Patients According to Skin Subtypes.

Background/Objective: The aim of this study was to compare thiol/disulfide homeostasis and clinical parameters of rosacea patients across skin subtypes of the disease and healthy controls. Methods: This prospective study included 90 rosacea patients with different skin subtypes (phymatous, erythematotelangiectatic and papulopustular) and ocular involvement and 30 healthy controls. Plasma native thiol (NT), total thiol (TT) and disulfide levels of the patients and controls were measured using an automated spectrophotometric method, and disulfide/native thiol ratio (DNTR), disulfide/total thiol ratio (DTTR) and native thiol/total thiol ratio (NTTR) were calculated. Tear breakup time (TBUT), meiboscore, Schirmer, ocular surface disease index (OSDI) and rosacea-specific quality of life scale (RosaQoL) were measured clinically. Results: Disulfide, DNTR and DTTR were significantly higher, and NT, TT and NTTR were significantly lower in the rosacea patients compared to the controls (p < 0.001). TBUT and Schirmer were significantly lower, and meiboscore and OSDI were significantly higher in the patients compared to the controls (p < 0.01). According to the skin subtypes, disulfide, DNTR and DTTR were significantly higher, and NTTR was significantly lower in the erythematotelangiectatic subtype compared to the other subtypes (p < 0.002). TBUT was significantly lower, and RosaQol was significantly higher in the erythematotelangiectatic subtype (p < 0.0083). Strong correlations were found between DNTR and TBUT and between DNTR and Meiboscore in all subtypes (p < 0.005), while there were strong correlations between DNTR and OSDI and between DNTR and RosaQol only in the erythematotelangiectatic and papulopustular subtypes (p < 0.05). Conclusions: The thiol/disulfide homeostasis shifted towards disulfides, an indicator of oxidative stress in rosacea, and this was more pronounced in the erythematotelangiectatic subtype. The impairment in TBUT and RosaQol was also more prominent in the erythematotelangiectatic subtype and strongly associated with the DNTR.

Evaluation of antioxidant activity in without persistent ST-segment elevation

Aims: Coronary artery disease is the most common cause of mortality and morbidity worldwide. Oxidative stress is involved in the pathogenesis of many diseases, including atherosclerosis. Thiols are important antioxidants for the elimination of reactive oxygen radicals and oxidative stress. In this study, we aimed to compare patients suffering from without persistent ST-segment elevation (NSTMI) and volunteers with normal coronary arteries in terms of antioxidants. Methods: The study included 105 patients diagnosed with NSTMI and 51 controls. Plasma total thiol, native thiol, and disulfide levels were measured. Results: Baseline demographic characteristics were similar between the groups. The ejection fraction was lower in the patient group. In terms of biochemical and hematologic parameters, glucose, AST, ALT, white blood cell count, and troponin were higher in the patient group, while other parameters were similar. Plasma native thiol (344.32 ± 81.28 µmol/L versus 403.62 ± 62.36 µmol/L, p &lt; 0.0001) and total thiol (382.90 ± 91.13 µmol/L versus 444.17 ± 65.53 µmol/L, p &lt; 0. 0001) levels were lower in NSTMI patients compared to control patients, while disulfide (19.29± 3.19 versus 20.27± 8.10, p = 0.77) levels were similar between the groups. Conclusion: In this study, we found that native thiol and total thiol levels, which are antioxidant markers, were lower in patients with NSTMI compared with the control group. Our study shows that antioxidant activity is affected in NSTMI, and antioxidant levels are decreased.

Evaluation of Plasma Total Thiol Levels in Patients with Carbon Monoxide Poisoning in the Emergency Department

Objective: The study aimed to measure the levels of total thiol, an antioxidant parameter, in patients who presented to the emergency department (ED) with carbon monoxide (CO) poisoning under normobaric oxygen therapy (NBOT), evaluate the time-dependent changes in total thiol levels within the first 6 hours, and examine the course of antioxidants in CO poisoning. &#x0D; Materials and Method: The study population consisted of 85 patients diagnosed with CO poisoning in the ED and 50 volunteers. Total thiol level was measured in the study group at the admission (T0), first (T1) and sixth hour (T6). Carboxyhemoglobin levels, cardiac markers, electrocardiography, and routinely requested tests were investigated in patients with poisoning. The total thiol level was measured in the volunteer group. &#x0D; Results: There was a significant decrease in total thiol mean levels between T0 and T1 (p

Acarbose, an α-Glucosidase Inhibitor, Maintains Altered Redox Homeostasis During Aging by Targeting Glucose Metabolism in Rat Erythrocytes.

Increasing age is the single largest risk factor for a variety of chronic illnesses. As a result, improving the capability to target the aging process leads to an increased health span. A lack of appropriate glucoregulatory control is a recurring issue associated with aging and chronic illness, even though many longevity therapies result in the preservation of glucoregulatory control. In this study, we suggest that targeting glucose metabolism to improve regulatory control can help slow the aging process. Male Wistar rats, both young (age 4 months) and old (age 24 months), were given acarbose (ACA) (30 mg/kg b.w.) for 6 weeks. An array of oxidative stress indicators was assessed after the treatment period, including plasma antioxidant capacity as determined by the ferric reducing ability of plasma (FRAP), reactive oxygen species (ROS), lipid peroxidation (malondialdehyde [MDA]), reduced glutathione (GSH), total plasma thiol (sulfhydryl [SH]), plasma membrane redox system (PMRS), protein carbonyl (PCO), advanced oxidation protein products (AOPPs), advanced glycation end products (AGEs), and sialic acid (SA) in control and treated groups. When compared with controls, ACA administration increased FRAP, GSH, SH, and PMRS activities in both age groups. The treated groups, on the contrary, showed substantial decreases in ROS, MDA, PCO, AOPP, AGE, and SA levels. The effect of ACA on almost all parameters was more evident in old-age rats. ACA significantly increased PMRS activity in young rats; here the effect was less prominent in old rats. Our data support the restoration of antioxidant levels in older rats after short-term ACA treatment. The findings corroborate the potential role of ACA as a putative calorie restriction mimetic.

Neurocognitive impairment in multiple sclerosis and its association with thiol-disulfide homeostasis and ischemia-modified albumin.

This study aimed to assess the possible association between cognitive impairment and two important biochemical biomarkers of oxidative stress, thiol-disulfide homeostasis (TDH), and ischemia-modified albumin (IMA) in patients with multiple sclerosis (MS). This study included 85 patients with MS (38 treatment-naïve relapsing-remitting MS (RRMS), 31 RRMS on fingolimod therapy, and 16 secondary progressive MS (SPMS)) and 33 healthy controls. Cognitive evaluation was carried out by applying the Brief International Cognitive Assessment for Multiple Sclerosis (BICAMS) test battery and the scores were adjusted for age and years of education. Plasma TDH was assessed using an automated method and plasma IMA levels were determined using the cobalt-albumin binding assay. Plasma native thiol and total thiol levels were significantly decreased in patients with SPMS when compared with the naïve patients and healthy controls. Cognitive impairment was detected in 47.4% of naïve patients, 64.5% of patients on fingolimod therapy, and 80% of patients with SPMS. Naïve patients or patients on fingolimod therapy who were cognitively impaired had significantly decreased levels of native thiol and total thiol compared to the cognitively normal patients. Logistic regression analysis revealed total thiol and native thiol to be significantly associated with cognitive impairment in naïve patients and patients on fingolimod therapy. Significant correlations were determined between BICAMS scores, TDH, IMA, clinical indices of disease severity (EDSS and MSSS), and magnetic resonance imaging parameters. This study has shown for the first time that plasma TDH parameters are associated with cognitive impairment in MS.

Evaluation of Oxidative Stress with "Dynamic Thiol/Disulfide Homeostasis" in Cases with Endometrioma

Objective: This preliminary study aims to use "dynamic thiol/disulfide homeostasis" with the new Erel method to evaluate the effect of oxidative stress in patients with endometrioma. Material and Method: The study group consisted of 40 cases with histologically confirmed endometrioma, and 40 women with no laparoscopically confirmed endometriosis were taken as the control group. Plasma thiol, total thiol (TT), and disulfide (SS) levels were measured with the new, fully automatic method described by Erel and Neselioglu. Serum Ca-125, sedimentation (Sed), C-reactive Protein (CRP), and thiol/disulfide levels were measured. The two groups' plasma thiol, total thiol, and disulfide levels were compared, and the relation between thiol/disulfide homeostasis and stage of the endometriosis, Ca-125, Sed, and CRP was evaluated. Results: In cases with endometrioma, disulfide/native thiol (3,12±2,02, 2,05±1,21, p=0,005) and disulfide/total thiol ratios (3,50±2,52, 2,22±1,36, p=0,006) were significantly increased, native thiol (469,30±126,52, 571,72±125,32 p=0,00) total thiol levels (505,17 ± 133,88, 603,0±134,22 p=0,02) were significantly decreased when compared with the control group. There was a positive correlation between native thiol level and revised American Society for Reproductive Medicine Classification (r-ASRM) (p=0,041). Conclusion: As expected, "dynamic thiol/disulfide homeostasis" with the new Erel method, the significant decrease in total thiol and native thiol levels, which are used as oxidative stress markers, and the increase in disulfide values demonstrated by this study support the hypothesis that oxidative stress plays a role in endometriosis and these markers can be used in the management of endometriosis

The Effects of Fentanyl on Testicular Ischemia-Reperfusion Injury.

Testicular torsion is a condition that often occurs as a result of the rotation of the spermatic cord in childhood and adolescence in men, manifests with acute pain and causes infertility in the future even if emergency intervention is performed. The aim of this study is to investigate the protective and preventive effects of fentanyl, a potent analgesic agent frequently used in anaesthesia practice, on testicular ischemia reperfusion injury, which manifests through acute pain. A total of 16 adult male Wistar rats, weighing 200-250 g, were used in this study. They were divided into two groups, consisting of eight animals in each group. Torsion was created in all rats by rotating left testicles 720 clockwise on the day of the experiment. 3 mM of fentanyl was applied intraperitoneally 30 minutes before detorsion to the fentanyl group. Following an hour of ischemia, the left testicle was reinstated, and tissues were repaired according to their physiology. Following 24 hours of reperfusion, the animals were euthanised after taking left testes and blood samples. Fentanyl, administered prior to testicular detorsion, significantly suppressed germ cell damage in torsioned tissue, catalase activity and malondialdehyde levels in blood samples taken from the heart. No significant differences were observed in plasma total thiol concentration, histological score, Leydig cell counts, percentage of necrosis and tubule rupture. These findings show that fentanyl administered before detortion creates a protective effect by preventing testicular ischemia reperfusion injury leading to infertility in the future.

Determination of Dynamic Plasma Thiol -disulfide Homeostasis with a Novel Technique in Intestinal Ischemia Reperfusion Injury

Introduction: Intestinal ischemia/reperfusion (I/R) is a serious life-threatening clinical case. Overproduction of reactive oxygen species (ROS) associated with oxidative stress plays a key role in I/R pathophysiology.&#x0D; Objective: The aim of this study is to evaluate dynamic thiol / disulfide hemostasis in intestinal I/R in rats.&#x0D; Materials and Methods: 24 Winstar albino rats were divided into 3 groups (8 animals in each group: (1) sham (operation without ischemia), (2) ischemia (90 minutes ischemia), (3) ischemia/reperfusion (after ischemia for 30 minutes reperfusion for 60 minutes). At the end of the process, liver samples were evaluated pathologically. Also, in plasma samples, native thiol, disulphide and total thiol levels were measured.&#x0D; Results: Native thiol levels in ischemia and I/R group were found to be significantly lower compared to the sham group (P&lt;0.001). Disulfide levels in Ischemia group were found to be significantly higher compared to the sham group (P&lt; 0.05). Disulfide / native thiol levels in ischemia and I/R group were found to be significantly higher compared to the sham group (P &lt; 0.05). Disulfide / total thiol levels in both ischemia and I/R group were found to be significantly higher compared to the sham group (P&lt; 0.05).&#x0D; Conclusion: Balance of dynamic thiol/disulfide is a quite suitable indicator for evaluating oxidative stress which occurs as a result of intestinal I/R. As a result, measurement of dynamic thiol/disulfide balance with Erel method is fully automated and practical for evaluating oxidative environment which is formed with ischemia reperfusion.

Plasma thiol/disulphide homeostasis changes in patients with restless legs syndrome.

Restless legs syndrome (RLS) is a common neurological condition. Oxidative stress plays an important role in its pathogenesis. Thiol-disulphide homeostasis (TDH) is a new biomarker of oxidative stress. We studied plasma TDH to determine whether TDH could be used as a new biomarker for RLS and evaluated correlations between TDH and various disease severity rating scales. A total of 25 RLS patients and 25 healthy controls were included into the study. TDH status was determined using an automated spectrophotometric analysis method and correlations were analyzed between the TDH status and various disease rating scales in the RLS patients. Plasma total (401±27μmol/L) and native thiol (354±30μmol/L) levels were significantly lower, but disulphide level (24±6μmol/L) was significantly (<0.0001) higher in the RLS patients compared to the controls (455±36, 424±37, 15±5μmol/L, respectively). The disulphide/native thiol and disulphide/total thiol ratios increased, in contrast, native thiol/total thiol ratio decreased significantly in the RLS patients compared to thehealthy controls (<0.0001). The disulphide levels correlated positively with age and various rating scores of the RLS patients. International Restless Legs Syndrome Study Group (IRLSSG) rating score and age correlated negatively with the total and native thiol levels. Our findings indicate increased oxidative stress in the RLS patients reflected by decreased native and total thiol, and increased disulphide levels and positive correlations between the disulphide levels and various rating scores. We suggest dynamic TDH status to be used as a novel biomarker for the diagnosis and follow-up of the RLS patients.

Plasma Total Thiols and Total Thiol/Albumin Ratio in Patients Suffering from Depression

Introduction: Increased oxidative stress has been reported in patients who suffer from depressive disorders. Albumin acts as a target for plasma protein oxidation during oxidative stress. The plasma thiols act as significant in vivo antioxidants. Major SH-groups are found on the surface of albumin molecules. Since depressive disorders are related to oxidative stress. Only a few studies have been done that correlate plasma total thiols with major depressive disorder. The authors intended to draw a relationship between oxidative stress, thiols and major depressive disorder by estimating total plasma thiols and calculating the ratio of thiol/albumin. The study may throw some light in understanding whether the use of anti-oxidant supplements to counter oxidative stress in depressed patients. Aim: The aims was to estimate plasma thiols, albumin and obtain a plasma thiol/albumin ratio in people suffering from depression and compare the levels with the control group. Materials and Methods: This case control study was conducted in Kasturba Medical College, Manipal. Plasma thiols were estimated using Ellman’s method. Plasma albumin levels were estimated using Bromo-cresol green dye binding method. Mann- Whitney U test was used for analysing the data for total thiols and thiol/albumin ratio. A p-value &lt;0.05 was considered significant. Results: The study group was made up of 43 (22 males and 21 females) patients and the control group was made up of 40 (18 males and 22 females) healthy controls. Plasma thiol levels and the plasma total thiol/albumin ratio were significantly elevated (p-value=0.00036) in cases (depression) as compared to that of the controls. Conclusion: Plasma total thiols can be used as an early marker for understanding the risk for major depressive disorders and also be used as a prognostic indicator in the follow up of patients suffering from major depressive disorder who are under treatment.

Acute cerebrovascular effects in juvenile coho salmon exposed to roadway runoff

Urban stormwater is responsible for recurrent mortality events of coho salmon (Oncorhynchus kisutch) documented in the US Pacific Northwest. Currently, the toxic mode of action is unknown; however, mortality is often associated with large increases in hematocrit (Hct). We found that hemoconcentration and red cell swelling may offer a partial explanation for increased Hct, based on increased total hemoglobin and reduced mean cell hemoglobin concentration of the blood in runoff-exposed juvenile coho salmon, relative to controls. No significant changes were seen in plasma total thiols or antioxidant power, discounting osmoregulatory dysfunction and plasma dehydration as a driver of hemoconcentration. To test for plasma leakage, we injected Evans blue dye complexed with bovine serum albumin (EBD–BSA) intracardially and circulated for 5 min, followed by a 15 min washout with saline. Coho salmon exposed to roadway runoff showed significant accumulation of EBD–BSA in brain and olfactory rosette regions compared with controls, demonstrating plasma leakage from the cerebrovasculature. Our results suggest blood–brain barrier disruption underlies symptom development in coho salmon exposed to roadway runoff.

Impaired thiol/disulphide homoeostasis in children with steroid-sensitive nephrotic syndrome.

Abnormal thiol/disulphide homoeostasis (TDH) is responsible for the pathogenesis of various diseases. We aimed to examine the TDH in children with steroid-sensitive nephrotic syndrome (SSNS). A total of 131 children, 60 with SSNS and 71 healthy controls, participated in the study. Plasma total thiol (TT), native thiol (SH) and disulphide (SS) levels in the SSNS during remission and control groups were estimated using a new method developed by Erel and Neselioglu. Albumin, TT, SH levels and SH/TT ratio were decreased, whereas SS/SH and SS/TT ratios were elevated in SSNS group compared with control group. However, there was no significant difference in SS levels between the two groups. Albumin level was positively correlated with TT, SH and SS levels in the SSNS group. We found that TDH shifts in favour of oxidants in children with SSNS in remission. This shift indicates that SSNS patients are exposed to augmented oxidative stress.

Oligopin® Supplementation Mitigates Oxidative Stress in Postmenopausal Women with Osteopenia: A Randomized, Double-blind, Placebo-Controlled Trial

BackgroundEvidence indicates a close association between oxidative stress and the etiopathogenesis of osteopenia. In vitro and animal studies report that Oligopin®, an extract of French maritime pine bark extract, has beneficial effects on oxidative stress. PurposeHere, we aimed to determine whether supplementation with Oligopin® affects bone turnover markers, antioxidant enzymes, and oxidative stress markers in these patients. MethodsForty-three postmenopausal women with osteopenia were randomized in a placebo-controlled, double-blind clinical trial to receive either 150 mg/day Oligopin® (n = 22) or placebo (n = 21) for 12 weeks. Plasma levels of bone turnover markers; osteocalcin (OC), type I collagen cross-linked C-telopeptide (CTX-1), OC/CTX1 ratio along with total antioxidant capacity(TAC), malondialdehyde (MDA) concentration, protein carbonyl, and total thiol contents in plasma, activities of manganese superoxide dismutase (MnSOD) and catalase in both peripheral blood mononuclear cells (PBMCs) and plasma as well as mRNA expression of MnSOD, catalase, and Nrf2 in PBMCs were measured at the baseline and the end of the intervention. ResultsOligopin® supplementation significantly increased OC levels and the ratio of OC to CTX1 in women with osteopenia compared to placebo intervention after 12 weeks. Oligopin® significantly decreased plasma protein carbonyl content in postmenopausal women compared with the after placebo treatment. Moreover, Oligopin® intervention significantly increased plasma total thiol content, TAC, plasma activity of both MnSOD and catalase, and the transcript level of Nrf2, MnSOD, and catalase in comparison with the placebo group. ConclusionSupplementation with 150 mg/day Oligopin® for 12 weeks exerts beneficial effects in postmenopausal osteopenia through improving the antioxidant defense system in the plasma and PBMCs that was accompanied by an increase in indicators of bone turnover.

Bariatric Surgery Normalizes Protein Glycoxidation and Nitrosative Stress in Morbidly Obese Patients.

The results of recent studies indicate the key role of nitrosative stress and protein oxidative damage in the development of morbid obesity. Nevertheless, the effect of bariatric surgery on protein oxidation/glycation and nitrosative/nitrative stress is not yet known. This is the first study evaluating protein glycoxidation and protein nitrosative damage in morbidly obese patients before and after (one, three, six and twelve months) laparoscopic sleeve gastrectomy. The study included 50 women with morbid obesity as well as 50 age- and gender-matched healthy controls. We demonstrated significant increases in serum myeloperoxidase, plasma glycooxidative products (dityrosine, kynurenine, N-formyl-kynurenine, amyloid, Amadori products, glycophore), protein oxidative damage (ischemia modified albumin) and nitrosative/nitrative stress (nitric oxide, peroxy-nitrite, S-nitrosothiols and nitro-tyrosine) in morbidly obese subjects as compared to lean controls, whereas plasma tryptophan and total thiols were statistically decreased. Bariatric surgery generally reduces the abnormalities in the glycoxidation of proteins and nitrosative/nitrative stress. Noteworthily, in the patients with metabolic syndrome (MS+), we showed no differences in most redox biomarkers, as compared to morbidly obese patients without MS (MS−). However, two markers: were able to differentiate MS+ and MS− with high specificity and sensitivity: peroxy-nitrite (>70%) and S-nitrosothiols (>60%). Further studies are required to confirm the diagnostic usefulness of such biomarkers.

Hyperoxic reperfusion after a ST-elevation myocardial infarction n mature Wistar rats does not increase oxidative stress

Ischemia-reperfusion injury (IRI) is a paradoxical tissue response following reoxygenation of an ischemic organ. The predominant role of oxidative stress (OS) in IRI is well established. In humans, hyperpoxia exacerbates myocardial infarction (MI) size in the setting of STEMI (AVOID study. Circulation 2015). This is not seen in experimental studies in young and healthy animals. Effects of hyperoxia on OS during myocardial reperfusion (MR) in STEMI are unknown in mature rodents. To test the hypothesis that hyperoxic myocardial reperfusion (HMR) in mature Wistar rats increases IRI in comparison to normoxic reperfusion (NMR). Twenty-nine mature male Wistar rats (35–40vweeks old) underwent myocardial ischemia by LAD ligation for 60 minutes. Animals were randomised either in the HMR (receiving 100% oxygen, n = 13) or the NMR (ambient air, n = 16) groups. MR lasted for 3 hours after LAD reopening. The SHAM group underwent surgery without LAD ligation ( n = 7) and was ventilated with ambient air for 4 hours after surgery. Blood samples were collected before ischemia and after reperfusion. Troponin T was measured as a surrogate of MI size. Plasma superoxide dismutase (SOD) and total thiols (TT) were measured as antioxidant biomarkers. Plasma malondialdehyde (MDA) and 3-chlorotyrosine (3-ClT) (myeloperoxidase surrogate) were measured as oxidant biomarkers. Pre-ischemia troponin, plasma SOD, TT, MDA and 3-ClT were similar in the 3 groups (HMR, NMR and SHAM). There was a difference in the post-reperfusion troponin measurement between SHAM and HMR, and SHAM and NMR, P = 0.01 and 0.03 respectively. Post-reperfusion troponin levels did not differ between HMR and NMR ( P -value = 0.178). Post-reperfusion OS biomarkers did also not differ between HMR and NMR. HMR after STEMI in mature Wistar rats increased neither infarct size nor oxidative stress. Aging only may thus not explain the deleterious effect of HMR in humans.

Thiol-disulfide status of patients with cervical cancer.

The evaluation of dynamic thiol-disulfide homeostasis among patients with the cancer of the uterine cervix. The study was conducted in 62 cervical cancer patients and 61 healthy women who had been followed up in an obstetrics and gynecology clinic between September 2018 and April 2020. Serum disulfide, native thiol, total thiol, ischemia modified-albumin, total antioxidant and oxidant capacities, and oxidative stress index values were measured in all participants. The mean plasma disulfide levels of the cervical cancer group was statistically significantly higher than that of the control group (25.79 ± 6.90 μmol/L, 22.31 ± 6.11 μmol/L, respectively) (P = 0.004). Plasma native thiol and total thiol levels were lower in cervical cancer patients (299.27 ± 99.05 μmol/L and 350.86 ± 102.72 μmol/L, respectively) compared to controls, but no statistically significant difference was observed (318.00 ± 93.75 μmol/L and 376.44 ± 98.51 μmol/L, respectively) (P = 0.284, P = 0.161). With respect to the ischemia modified-albumin level, no statistically significant difference was observed between two groups. There were statistically significant positive association between disulfide level and both the stage of cervical cancer (r = 0.278, P = 0.029) and total oxidant capacity level (r = 0.256, P = 0.046). Dynamic thiol-disulfide homeostasis may participate in the pathophysiological mechanisms of cervical cancer and may be a potential biomarker for early identification of cervical cancer in future.

Differential of Antioxidant Ability, CD4+T Cells Count and Viral Load in HIV Infected Patients on cART in Yaounde, Cameroon

Background Decreased antioxidant ability is one of the worsening conditions in AIDS.We aimed to evaluate total antioxidant ability among others, and their variation in HIV infected patients following their CD4+T cells count and viral load, in a context of new ART scarcity in most LMICs. Material and Methods We conducted a cross sectional study on 167 individuals (76 controls, 33 treatments naïve and 58 HIV-1 infected patients on ART). We assessed their plasma total antioxidant ability (FRAP), malondialdehyde (MDA) and thiol (SH) groups using standard spectrophotometric methods, then we calculated lipid peroxidation index (LPI). Statistical analysis was performed using GraphPad Prism 6. Data were analyzed by two-tailed unpaired t-test for two groups’ comparison and ANOVA for more than two groups. Pearson correlation between CD4+T cells count, viral load and the above markers was determined; P ≤ 0.05 was considered statistically significant. Results The following controls/naïve/treated subjects’ values for FRAP(mM) (1.907±0.074/1.77±0.05/1.695±0.03); MDA(μΜ) (0.781±0.081/1.115±0.118/ 1.342±0.109); SH (μΜ) (2.747±0.130/1.582±0.197/1.498 ±0.140)and LPI (0.43±0.61/ 0.61±0.7/2.59±0.83) were all obtained with P ≤ 0.05. The FRAP increased only with 3TC+TDF+EFV and 3TC+ABC+NVP cART while MDA decrease significantly with the later(p=0.027). MDA and LPI significantly increased in heavily treated patients with p&lt;0.0014 and p=0.0001 respectively. overall, the patients showed an increase of viral loads following a decrease of CD4+T cells (r= -0.803, p=0.016) but 3TC+TDF+EFV seem to better manage the both. The only significant correlation was established between SH groups and CD4+Tcells count (r=0.447; p=0.0006); Conclusion Our study showed that thiol groups may be protective againstCD4+Tcells count depletion and that the cART 3TC+TDF+EFV, 3TC+ABC+NVP may be helpful in fighting against free radical generation and particularly 3TC+TDF+EFV as controlling CD4+Tcells count and viral load in long term treated patients. The study particularly showed the implication of cART in increasing lipid peroxidation index following the treatment duration in heavily treated patients, which aggravated their conditions in an area where drug options are limited, calling for new drugs availability and personalized medicine.

Evaluation of thiol disulphide levels in patients with pulmonary embolism

Abstract Objectives Maintaining the thiol-disulphide balance is essential for antioxidant defense and apoptosis. The study aimed to evaluate of thiol-disulphide levels in patients with pulmonary embolism (PE). Methods The study included a total of 97 participants: 48 patients and 49 healthy individuals. Serum native thiol (NT), total thiol (TT) and disulphide (DS) levels (µmol/L) were measured using the novel spectrophotometric method. Results We found significantly lower levels of NT (195.44±83.3 μmol/L), DS (20.42±9.20 μmol/L) and TT (236.26±90.66 μmol/L) in patients with PE compared with the healthy controls (304.42±62.13, 24.33±8.09 and 353.07±63.58 μmol/L respectively). Patients with PE had lower serum albumin levels (3.11±1.03 g/dL) and higher ischaemia modified albumin (IMA) levels (0.82±0.16 g/dL) compared with the controls (3.89±0.52 and 0.67±0.15 g/dL, respectively). Serum albumin levels in patients were strongly correlated with plasma IMA (r=−0.737; p&lt;0.001), NT (r=0.786; p&lt;0.001) and TT levels (r=0.841; p&lt;0.001). Serum NT levels were strongly correlated with serum TT levels (r=0.981; p&lt;0.001) in patients. Conclusions This study found lower TT, NT and DS levels in patients with PE than in the control group. Our study revealed that thiol-disulphide homeostasis could be altered during PE and further studies are needed to be used as prognostic markers for hospital mortality.

Investigation of DNA damage, oxidative stress, and inflammation in synthetic cannabinoid users.

The widespread use of synthetic cannabinoids (SCs) among youth has become an important public health problem. Several life-threatening side effects of SC have been reported, including cardiovascular, gastrointestinal, neurological, renal, metabolic, ophthalmologic, and pulmonary effects, besides skin toxicity and hepatotoxicity. Given that high levels of SC can lead to oxidative stress, DNA damage, and inflammation, it has been aimed in this study to investigate the effects of SC in aspects of primary DNA damage, plasma total oxidant status (TOS)/total antioxidant status (TAS), thiol-disulfide homeostasis, myeloperoxidase (MPO) level, and cytokine levels (interleukin 1 beta (IL-1β), interleukin 6 (IL-6), and tumor necrosis factor-alpha (TNF-α)) of 40 SC users (SCUs) in Turkey. Mean plasma TOS levels were significantly higher in the SCUs group than in the healthy group (HG). Similarly, mononuclear leukocyte DNA damage, plasma TOS, MPO activity, disulfide, oxidative stress index levels, IL-1β, IL-6, and TNF-α levels were significantly higher in the SCU group than in the HG, whereas plasma TAS, total, and native thiol levels were significantly lower in the SCU group than in the HG. It is concluded that SC can cause increase in oxidative stress and in inflammatory processes in addition to its potential for DNA damage. Additional studies with larger sample sizes and longer durations should be held to understand more specific outcomes of SC use.

AChE mRNA expression as a possible novel biomarker for the diagnosis of coronary artery disease and Alzheimer’s disease, and its association with oxidative stress

Oxidative metabolic reactions and their by products have played a role in coronary artery disease (CAD) and Alzheimer’s disease (AD) pathogenesis. This study was carried out on 28 patients with AD, 21 patients with CAD, and 28 healthy as control. Oxidative stress biomarkers and acetylcholinesterase (AChE) activity were assayed in plasma. mRNA expression of AChE was investigated in leukocytes of patients with CAD and AD. Thus, Alzheimer’s and coronary artery patients were observed that the protein carbonyl levels and mRNA expression of AChE were increased (p<.05, p<.01, respectively). The plasma total thiol levels were decreased compared to the control group (p<.05). There was a significant relationship between amyloid β (Aβ) accumulation and oxidative stress, cholinergic gene expression. AChE gene expression and protein oxidation were increased in patients with AD and CAD. These results suggest that increased release of AChE from cells produces neurotoxic β-amyloid plaques and may cause neurodegenerative diseases.