Dynamic thiol-disulfide homeostasis in hyperemesis gravidarum

The effect of slow-release vaginal dinoprostone on maternal and fetal oxidative stress in term pregnancies complicated by oligohydramnios: Prospective cohort study

BACKGROUND

To evaluate changes in oxidant status using thiol/disulfide homeostasis in mothers and fetuses after induction of labor with slow-release vaginal dinoprostone inserts.

METHODS

A total of 70 pregnant women were divided into two groups. Thirty-five women in whom labor was induced with slow-release vaginal dinoprostone inserts (10 mg of prostaglandin E2, group A) were compared before and after the administration. The other 35 women, who were followed up spontaneously during labor (group B), were included as a control group. Both groups were diagnosed with isolated oligohydramnios without signs of placental insufficiency. The thiol/disulfide homeostasis parameters were calculated before medical induction and after removal of the insert at the beginning of the active phase of labor. Maternal and cord blood values were measured in both groups.

RESULTS

Although the balance shifted to the antioxidant side after the slow-release vaginal dinoprostone insert was applied, there was no significant difference in maternal oxidative load compared to the pre-application status (5.32 ± 014/5.16 ± 0.15, p = 0.491). Despite the shift toward the antioxidant side, maternal antioxidants were still significantly lower in the group that received slow-release vaginal dinoprostone at the beginning of the active phase of labor than in the control group (295.98 ± 13.03/346.47 ± 12.04, respectively, p = 0.009). There was no statistically significant difference in terms of oxidative balance or newborn Apgar score ( p > 0.05).

CONCLUSION

Induction of labor with slow-release vaginal dinoprostone inserts in pregnancies with isolated oligohydramnios does not cause further oxidative stress and is safe for both mothers and neonates in terms of oxidant load by thiol/disulfide homeostasis.

Maternal serum ischemia-modified albumin (IMA), total-sulphydryl concentrations, and some subclinic inflammatory markers in hyperemesis gravidarum (HG)

OBJECTIVE

This study investigates the relationship between Ischemia Modified Albumin and Total-Sulphydryl levels with some subclinical inflammatory markers in patients with hyperemesis gravidarum.

MATERIALS AND METHODS

A total of 258 pregnant women, 137 with hyperemesis gravidarum and 121 low-risk pregnancies, were included in this case-control study. The patients were divided into three groups according to the severity of hyperemesis gravidarum as mild (n = 53), moderate (n = 41) and severe (n = 43).

RESULTS

Serum Ischemia Modified Albumin levels were statistically different from the control group (P < 0.001). Among the subgroups, the highest Ischemia Modified Albumin value was observed in the severe hyperemesis gravidarum group, and the highest Total-Sulphydryl level was observed in the mild hyperemesis gravidarum group (P < 0.001). Serum potassium levels were higher in the control group (P < 0.001). While a negative correlation was observed between Ischemia Modified Albumin and Total-Sulphydryl, a positive correlation was observed in Platelet crit, C-reactive protein, and ketonuria. As the severity of the disease increases, Ischemia Modified Albumin, which is an oxidative stress factor, increases, and Total-Sulphydryl levels decrease (p < 0.001). Logistic regression analysis revealed that a one-unit increase in Ischemia Modified Albumin resulted in a statistically significant 1.9-fold increase in the risk of Severe hyperemesis gravidarum (OR 1.92, 95% CI 1.008-1.956; P = 0.01) CONCLUSION: This study shows that there is a condition in the pathophysiology of hyperemesis gravidarum, with an increase in Ischemia Modified Albumin and a decrease in Total-Sulphydryl levels, and oxidative stress occurs. It was important to detect increased Ischemia Modified Albumin and decreased antioxidant values in relation to the inflammatory factors that were effective in the severe hyperemesis gravidarum group.

Investigation of Thiol/Disulfide Homeostasis and Ischemia-Modified Albumin Levels in Children with Wilson Disease

BackgroundThe aim of the present study was to assess thiol/disulfide homeostasis (TDH) parameters and ischemia-modified albumin (IMA) levels in children with Wilson Disease (WD) and to compare them to healthy controls. Methods: Based on the inclusion and exclusion criteria, fifteen children with WD and twenty-nine healthy children were enrolled, and serum thiol/disulfide and IMA levels were compared between groups. Results: The mean values of native and total thiols were significantly lower in the WD group than in the control group. The mean value of disulfide was significantly higher in the WD group than in the control group. The mean percentages of disulfide/total thiol and native thiol/total thiol were higher in the WD group than in the control group. The IMA value was also higher in the WD group than in the control group. Conclusion: The present study demonstrating altered thiol/disulfide parameters indicates increased oxidative stress in children with WD.

Adjuvant Hypnotherapy for Hyperemesis Gravidarum: A Randomized Pilot Study

Hyperemesis gravidarum, which requires hospitalization in approximately 1% to 5% of patients, is characterized by severe nausea and vomiting in pregnancy. This study investigated the effects of hypnosis on nausea, vomiting, use of antiemetic medications, and hospital stay among patients diagnosed with hyperemesis gravidarum. Patients were randomized to receive either conventional therapy alone (control condition, n = 23) or adjuvant hypnotherapy plus conventional therapy (treatment group, n = 18). Sociodemographic data, severity of nausea, frequency of vomiting per day, rescue medications used, and length of hospital stay were recorded. Participants in the treatment group received 2 sessions of hypnosis and were instructed in daily self-hypnosis practice. Those in the control group received treatment as usual. Results from this study indicated that adjunctive use of hypnotherapy with patients diagnosed with hyperemesis gravidarum experienced significantly reduced severity of nausea and frequency of vomiting compared to treatment-as-usual alone. Also, hospital stay was found to be shorter in the treatment group as compared to the control group. These findings are encouraging and suggest it is feasible and potentially beneficial to include adjunctive hypnotherapy to treat hyperemesis gravidarum.

Dynamic thiol/disulfide homeostasis as oxidative stress marker in diabetic ketoacidosis

Background/aim

The aim of present study was to investigate the dynamic thiol/disulfide homeostasis as oxidative stress marker in diabetic ketoacidosis (DKA).

Materials and methods

A total of 77 participants consisting of 32 patients with DKA and 45 healthy volunteers were included in the study. Thiol/disulfide homeostasis (TDH) [total thiol-native thiol/disulfide changes] were measured in both groups (patient group and control group) using a brand new method developed by Erel and Neselioglu. Half of the difference between total thiol and native thiol concentrations gives the amount of disulfide bond. 


Results

Total thiol, native thiol, and disulfide levels in blood were found to be low. The levels of total thiol (P < 0.001) and native thiol (P < 0.001 ) were significantly lower in patients with DKA than in the control group. At the same time, the level of disulfide was nonsignificantly lower in the patient group than the control group (P = 0.388). The level of IMA was higher in the patient group than in the control group (P < 0.001).

Conclusion

The total thiol, native thiol, and disulfide levels in DKA decrease in favor of oxidative stress.

Thiol-disulfide homeostasis: an integrated approach with biochemical and clinical aspects

Dynamic thiol-disulfide homeostasis (TDH) is a new area has begun to attract more scrutiny. Dynamic TDH is reversal of thiol oxidation in proteins and represents the status of thiols (-SH) and disulfides (-S-S-). Organic compounds containing the sulfhydryl group is called thiol, composed of sulfur and hydrogen atoms. Disulfides are the most important class of dynamic, redox responsive covalent bonds build in between two thiol groups. For many years, thiol levels were analyzed by several methods. During last years, measurements of disulfide levels have been analyzed by a novel automated method, developed by Erel and Neselioglu. In this method, addition to thiol (termed as native thiol) levels, disulfide levels were also measured and sum of native thiol and disulfide levels were termed as total thiol. Therefore, TDH was begun to be understood in organism. In healthy humans, TDH is maintained within a certain range. Dysregulated dynamic TDH has been implicated several disorders with unknown etiology. A growing body of evidence has demonstrated that the thiol-disulfide homeostasis is involved in variety diseases, such as diabetes mellitus, hypertension, nonsmall cell lung cancer, familial Mediterranean fever (FMF), inflammatory bowel diseases, occupational diseases, gestational diabetes mellitus and preeclampsia. These results may elucidate some pathogenic mechanism or may be a predictor indicating diagnostic clue, prognostic marker or therapeutic sign. In conclusion, protection of the thiol-disulfide homeostasis is of great importance for the human being. Evidence achieved so far has proposed that thiol-disulfide homeostasis is an important issue needs to elucidate wholly.

Protective Effects of Boron on Cyclophosphamide-Induced Bladder Damage and Oxidative Stress in Rats

This study aims to investigate protective effects of boron against cyclophosphamide-induced bladder toxicity that produces oxidative stress and leads to apoptosis of the cells. In total, 24 rats were divided into 4 equal groups. The control group received saline. The 2nd experimental group received 200 mg kg of cyclophosphamide i.p. on the 4th day while the 3rd group was given only boron (200 mg kg, i.p.) for 6 days. In the 4th group, boron was given for 6 days and cyclophosphamide (200 mg kg, i.p.) was administrated on the 4th day. Twenty-four hours after the last boron or cyclophosphamide administration, rats were sacrificed under anesthesia. Bladder tissues of rats were taken for histological and immunohistochemical (apoptotic markers such as caspase-3, bcl-2, and bax) and blood was taken for the biochemical (serum total thiol, serum natural thiol, serum thiol-disulfide) analysis. Transient epithelial thinning, edema, marked inflammatory reaction, and bleeding were observed in bladders of the group that received cyclophosphamide. Also, the activity of bax and caspase-3-positive cells increased while the number of bcl-2-positive cells decreased. In the same group, serum natural thiol and total thiol levels decreased while serum disulfide levels increased, which indicates oxidative stress. On the other hand, in the boron+cyclophosphamide group pretreatment with boron protected, the bladder tissue and the number of bcl-2-positive cells increased, and bax and caspase-3-positive cells decreased, showing antiapoptotic effects of boron against cyclophosphamide-induced toxicity. In parallel with the findings of this group, native thiol and total thiol levels increased and serum disulfide levels decreased pointing out to a decreased oxidative stress. Our results indicate that boron pretreatment significantly protects rat bladder against cyclophosphamide-induced bladder damage due to its antiapoptotic and antioxidant properties.

Water Immersion During the Labour and Effects on Oxidative Stress

Objective: The study aims to investigate maternal serum thiol/disulfide homeostasis and ischemia-modified albumin (IMA) levels of women who were submerged during labor. Material and methods: Sixty-four pregnant women were enrolled in this study. Thirty-four women were submerged during the first stage of labor and 30 women were not. Native thiol, total thiol, disulfide, albumin, IMA, disulfide/native thiol, disulfide/total thiol and native thiol/total thiol concentrations were measured and demographic data were obtained. Results: Cord blood pH, serum disulfide levels and (disulfide/total thiol) × 100 levels were significantly lower in the water immersion group (P < 0.01, P = 0.01 and P < 0.01, respectively). Native thiol, total thiol, albumin and IMA levels were higher in the water immersion group P < 0.01, P < 0.01, P = 0.001 and P < 0.01, respectively). Conclusion: Water immersion during the first stage of labor was found to be associated with deterioration of thiol-disulfide homeostasis with respect to antioxidant status while IMA levels were higher, suggesting an ischemic condition.

Assessment of Oxidative Stress in Patients with Sudden Hearing Loss: A Non-randomized Prospective Clinical Study

The etiology of sudden hearing loss (SHL) has not been fully elucidated. Previous studies claimed that different etiological factors may play a role in the pathogenesis of SHL. The aim of the present study is to investigate the presence of oxidative stress (OS) in SHL cases using thiol-disulfide balance. In addition, total oxidant status (TOS), total antioxidant status (TAS), oxidative stress index (OSI) and lipid hydroperoxide levels (LOOH) were investigated. A total of 30 cases (15 female, 15 male, mean age 48.9 ± 8.1 years, age range: 36-68 years) were included in the study. Thiol and disulfide amounts, thiol/disulfide ratios, TOS, TAS, OSI and LOOH scores of the case group and control group were compared. Native thiol (SH) and total thiol (SH + SH) values were significantly lower in the SHL group than in the control group (p = 0.028 and p = 0.044, respectively). The LOOH value, TOS value and OSI value were significantly higher in the SHL group than in the control group (all p values < 0.05). The TAS value was significantly lower in the SHL group than in the control group (p = 0.0001). The present study has presented that the thiol-disulfide balance was impaired in SHL cases. OS may play a role in the development of SHL.

Maternal serum TXNDC5 levels and thiol/disulfide homeostasis in preeclamptic pregnancies

Objective: To investigate thiol/disulfide homeostasis (TDH) and thioredoxin domain-containing 5 (TXNDC5) level in early and late-onset preeclampsia.Material and methods: In this cross-sectional study, 24 pregnant women with early-onset preeclampsia and 26 pregnant women with late-onset preeclampsia were compared with 30 pregnant women with no obstetric complications. The serum TXNDC5 levels and thiol/disulfide homeostasis were measured.Results: Serum TXNDC5 levels were significantly higher in the early-onset and late-onset preeclampsia groups compared with the control group (p < .05). Native thiol and total thiol levels were significantly lower in the early-onset and late-onset preeclampsia groups than control group. The disulfide levels were found as significantly high in early preeclamptic patients compared to control group (p < .05). The highest levels of TXNDC5 and the lowest levels of native thiol and total thiol were found in early-onset preeclampsia group. No significant difference was found between the patients with early onset and late onset preeclampsia regarding TXNDC5 levels and thiol/disulfide homeostasis (p > .05).Conclusion: Serum TXNDC5 levels were significantly higher in patients with early-onset and late-onset preeclampsia. The dynamic thiol/disulfide homeostasis was impaired in favor of the oxidized state in patients with preeclampsia.

Dynamic thiol/disulphide homeostasis in acute pancreatitis

BACKGROUND/AIMS

The dynamic thiol/disulfide homeostasis plays pivotal roles in many physiological mechanisms in an organism. We aimed to investigate whether dynamic thiol/disulfide homeostasis changes among patients with acute pancreatitis.

MATERIALS AND METHODS

This prospective trial contained 45 patients with acute pancreatitis and 45 sex-and age-matched healthy volunteers as control group. Thiol/disulfide homeostasis parameters were measured by a novel and automated assay, and detected results were compared between the two groups.

RESULTS

Disulfide/total thiol percent ratio and disulfide/native thiol percent ratios were significantly higher in acute pancreatitis group; besides the native thiol, total thiol levels and native thiol/total thiol percent ratios were significantly lower (for all p < 0.001).

CONCLUSION

The thiol/disulfide homeostasis is impaired in acute pancreatitis with a shift toward the oxidative status, and this deficiency might be a pathogenic factor in acute pancreatitis. The correction of this thiol/disulfide imbalance may be a new target in the management of acute pancreatitis.

The effect of tinea versicolor on thiol/disulphide homeostasis

Introduction

Tinea versicolor is a superficial fungal infection caused by Malassezia spp. Malassezia spp. is a member of the normal human skin flora. It becomes a pathogen by transforming from the yeast form to the mycelium form. The oxidant/antioxidant homeostasis may be responsible for this. Thiol/disulphide homeostasis is a new marker indicating oxidative stress. This homeostasis is affected in many illnesses.

Aim

To investigate the thiol/disulphide homeostasis in patients with tinea versicolor.

Material and methods

Forty-two patients with tinea versicolor (median age: 36 years, min.–max.: 19–58) and 36 healthy controls (median age: 32 years, min.–max.: 18–60) were included in the trial. The levels of native thiol, disulphide, and total thiol were measured by an automated method in the patient and control groups. Disulphide/total thiol, disulphide/native thiol and native thiol/total thiol rates were calculated as percentage.

Results

For the patient group and the control group, the native thiol levels were found to be 464.32 ±51.48 mmol/l and 465.18 ±51.32 mmol/l, disulphide levels – 19.80 ±7.08 mmol/l and 21.27 ±8.90 mmol/l, total thiol levels – 503.92 ±53.65 mmol/l and 508.07 ±56.59 mmol/l, respectively. No statistical difference was detected between the two groups.

Conclusions

Thiol/disulphide homeostasis was not affected in tinea versicolor. According to our findings, oxidative stress seems to have no role in the pathogenesis of tinea versicolor.

The Effect of the 50 g Glucose Challenge Test on The Thiol/Disulfide Homeostasis in Pregnancy

AIM

A 50 g glucose challenge test (GCT) is recommended for screening all pregnant women for gestational diabetes mellitus. In this study, the effect of GCT on the thiol/disulfide balance was investigated.

METHODS

One-hundred women that underwent a 50 g GCT at 24-28 weeks of gestation (63 positive and 37 negative results) were evaluated in terms of thiol/disulfide in serum samples at test hours 0 and 1.

RESULTS

Compared to the baseline values (hour 0), after the glucose load (hour 1), the thiol and native thiol/total thiol (p < 0.0001) of the GCT-positive women were reduced whereas the values of glucose, disulfide, disulfide/native thiol, disulfide/total thiol (p < 0.0001) and total thiol increased (p = 0.018).

CONCLUSION

In GCT-positive pregnant individuals, the glucose load increases oxidative stress by changing the thiol/disulfide homeostasis. Such an effect is not observed in healthy pregnancies.

Dynamic thiol/disulphide homeostasis in patients with basal cell carcinoma

BACKGROUND

The aim of this study is to measure and compare the dynamic thiol/disulphide homeostasis of patients with basal cell carcinoma and healthy subjects with a newly developed and original method.

OBJECTIVE

Thirty four patients attending our outpatient clinic and clinically and histopathologically diagnosed as nodular basal cell carcinoma, and age and gender matched 30 healthy individuals have been involved in the study. Thiol/disulphide homeostasis tests have been measured with a novel automatic spectrophotometric method developed and the results have been compared statistically.

RESULTS

Serum native thiol and disulphide levels in the patient and control group show a considerable variance statistically (p = 0.028, 0.039, respectively). Total thiol levels do not reveal a considerable variation (p = 0.094). Disulphide/native thiol ratios and native thiol/total thiol ratios also show a considerable variance statistically (p = 0.012, 0.013, 0.010, respectively).

CONCLUSIONS

Thiol disulphide homeostasis in patients with basal cell carcinoma alters in the way that disulphide gets lower and thiols get higher. Thiol/disulphide level is likely to have a role in basal cell carcinoma pathogenesis.

Thiol/disulfide parameters as a novel oxidative marker in medical labor induction with oxytocin

BACKGROUND

The aim of this study was to analyze the alterations in thiol levels among mothers and neonates who were prone to medical oxytocin induction.

MATERIALS AND METHODS

A total of 40 pregnant women who underwent medical labor induction with oxytocin (Group A) were compared with 53 women whose labor progressed spontaneously without any kind of induction (Group B). We measured the thiol/disulfide homeostasis parameters (native thiol, total thiol, disulfide, disulfide/total thiol, disulfide/native thiol) of maternal and cord blood.

RESULTS

There were no statistically significant differences with respect to the maternal and cord blood thiol/disulfide homeostasis between the two groups.

CONCLUSION

Being an artificial intervention during labor, oxytocin induction has been found to be safe in terms of oxidative stress (OS) according to the results of this study. Both the maternal and the fetal sides were safe in this molecular manner against oxytocin infusion.

Impaired Thiol-Disulfide Balance in Acute Brucellosis

The objective of this study was to examine a novel profile: thiol-disulfide homeostasis in acute brucellosis. The study included 90 patients with acute brucellosis, and 27 healthy controls. Thiol-disulfide profile tests were analyzed by a recently developed method, and ceruloplasmin levels were determined. Native thiol levels were 256.72 ± 48.20 μmol/L in the acute brucellosis group and 461.13 ± 45.37 μmol/L in the healthy group, and total thiol levels were 298.58 ± 51.78 μmol/L in the acute brucellosis group and 504.83 ± 51.05 μmol/L in the healthy group (p < 0.001, for both). The disulfide/native thiol ratios and disulfide/total thiol ratios were significantly higher, and native thiol/total thiol ratios were significantly lower in patients with acute brucellosis than in the healthy controls (p < 0.001, for all ratios). There were either positive or negative relationships between ceruloplasmin levels and thiol-disulfide parameters. The thiol-disulfide homeostasis was impaired in acute brucellosis. The strong associations between thiol-disulfide parameters and a positive acute-phase reactant reflected the disruption of the balance between the antioxidant and oxidant systems. Since thiol groups act as anti-inflammatory mediators, the alteration in the thiol-disulfide homeostasis may be involved in brucellosis.

Disulfide stress in carbon monoxide poisoning

OBJECTIVES

Carbon monoxide (CO) remains the most common cause of lethal poisoning around the world. The purpose of this study was to investigate the homeostasis between thiol-disulfide couples and to evaluate oxidative status comprehensively in acute CO poisoning, using new parameters along with other well-known oxidant-antioxidant molecules.

DESIGN AND METHODS

This case study consisted of 43 subjects who were diagnosed with carbon monoxide poisoning and 35 healthy individuals who were used as controls. Thiol-disulfide paired tests were examined in both groups using the method developed recently.

RESULTS

Patients with CO poisoning had significantly higher levels of serum disulfide than the control patients (20.7±5.03 versus 16.43±3.97, p=0.001). Native thiol and total thiol levels were lower in the CO patient group than in the control group (p<0.001, for each variable). The disulfide/native thiol ratios and disulfide/total thiol ratios were significantly higher, while native thiol/total thiol ratios were significantly lower, in patients with acute CO poisoning than in the healthy controls (p<0.001, for all ratios). The disulfide/native ratios were negatively correlated with both total antioxidant response and paraoxonase and arylesterase values and were positively correlated with total oxidant status and ceruloplasmin values (p<0.05, for all correlations).

CONCLUSIONS

Excessive disulfide levels and their related ratios were found in CO poisoning patients. In particular, the disulfide/native thiol ratio was identified as an indicator for overall oxidative status. Among CO poisoning patients, the thiol-disulfide balance was found to be impaired. Therefore, the disruption of thiol-disulfide homeostasis might be involved in CO toxicity.

Assessment of serum thiol/disulfide homeostasis in multiple myeloma patients by a new method

OBJECTIVES

The etiology of multiple myeloma (MM) is not exactly known. This study investigated the role of thiol/disulfide homeostasis in the etiopathogenesis of MM.

METHODS

Some 50 patients with MM (aged 39-84 years) and 50 sex-matched healthy volunteer controls (aged 50-91 years) participated in this study. Venous blood samples were collected, and levels of native thiols, total thiols, and disulfide were measured.

RESULTS

Native and total thiol levels in the control group were determined to be higher than in the study and patient groups (P<0.001). Disulfide levels were found to be higher in the control group than in the study group and higher in newly diagnosed patients than in outpatients who were undergoing treatment (P=0.002). The ratios of thiol levels were found to be similar in both the study and control groups (P>0.05).

DISCUSSION

The results of the study show that although there was a decrease in the levels of disulfide, native thiol, and total thiol, the balance of thiol/disulfide was maintained. This is the first study to research the homeostasis of dynamic thiol/disulfide from the perspective of the new method that was used. We hope that this study will encourage and facilitate further studies in this area.

Alteration of thiol-disulphide homeostasis in acute tonsillopharyngitis

OBJECTIVE

Thiol-disulphide homeostasis (TDH) has a critical role in various clinical disorders. We aimed to assess the association of TDH with acute tonsillopharyngitis (AT) in children.

METHODS

This study included 94 (73 viral and 21 bacterial) tonsillopharyngitis patients and 88 control children. Their native thiol, total thiol, and disulphide levels were measured.

RESULTS

Viral and bacterial tonsillopharyngitis patients had lower native thiol levels compared with healthy children (P < 0.001 and P = 0.008, respectively). Both groups had lower total thiol levels compared with control children (P = 0.002 for viral, P = 0.011 for bacterial). The disulphide levels were lower in bacterial than in viral tonsillopharyngitis patients (P = 0.04), and there was a significant difference between viral tonsillopharyngitis patients and the control group (P < 0.001). The native/total thiol ratio in each patient group was lower than in the control group (P < 0.001 for viral, P = 0.017 for bacterial). The disulphide/native thiol and disulphide/total thiol ratios were significantly higher in viral (P < 0.001 for both) and bacterial tonsillopharyngitis patients (P = 0.017 for both) than in healthy children. In all patients, a correlation was found between the levels of C-reactive protein (CRP) and native thiol (r = -0.211, P = 0.04), CRP and total thiol (r = -0.217, P = 0.036), white blood cell (WBC) and native thiol (r = -0.228, P = 0.002), WBC and total thiol (r = -0.191, P = 0.01), and WBC and disulphide (r = 0.160, P = 0.03).

DISCUSSION

TDH is altered in AT in children. The alteration is more prominent in viral than in bacterial tonsillopharyngitis.

Impairment of thiol-disulfide homeostasis in preeclampsia

AIM

To investigate the effects of severity of preeclampsia on thiol-disulfide homeostasis (TDH).

MATERIAL AND METHODS

A total of 108 participants were divided into three groups: Group 1 was composed of pregnant women with no obstetric complications, Group 2 included pregnant women with mild preeclampsia, and Group 3 consisted of pregnant women with severe preeclampsia. TDH parameters were determined, and comparisons of clinical and routine laboratory test findings were made in all groups.

RESULTS

The serum native thiol level was 347.9 ± 27.4 in the control group, 237.2 ± 44.2 in the mild preeclampsia group, and 227.9 ± 53.1 in the severe preeclampsia group (p < 0.001). The serum total thiol level was 376.1 ± 31.9 in the control group, 261.8 ± 49.4 in the mild preeclampsia group, and 248.3 ± 57.4 in the severe preeclampsia group (p < 0.001). The disulfide level was 14.1 ± 5.6 in the control group, 12.3 ± 5.1 in the mild preeclampsia group, and 10.2 ± 4.8 in the severe preeclampsia group (p = 0.001). A significant correlation between impairment in degree of TDH and severity of preeclampsia was observed.

CONCLUSION

TDH was impaired in women with preeclampsia, and this impairment increased with disease severity. Therefore, impaired TDH may have a role in the etiopathogenesis of the disease.