Özlem Bölgen Çimen

Oxidant/antioxidant status of plasma samples from patients with rheumatoid arthritis.

Abstract This study aims to elucidate plasma oxidant/antioxidant status in patients with rheumatoid arthritis (RA). Fasting blood samples were obtained from 24 patients with RA and 20 control subjects. Antioxidant potential (AOP) value, nonenzymatic superoxide radical scavenger activity (NSSA), and malondialdehyde (MDA) levels were measured to establish plasma oxidant/antioxidant status in the patient and control groups. Patients with RA had lower AOP and NSSA but higher MDA levels than those of the control subjects, which was an indication of reduced antioxidant capacity and oxidant stress in these patients. Results suggest that the antioxidant system is impaired and peroxidation reactions are accelerated in patients with RA. We suppose that therapeutic use of some antioxidants may be beneficial in this regard.

Oxidant/antioxidant status of the erythrocytes from patients with rheumatoid arthritis.

Abstract: It has been suggested that enzymatic and/or non-enzymatic antioxidant systems are impaired in rheumatoid arthritis (RA) and hence patients are exposed to oxidant stress. This study aimed to establish whether this is really the case. Fasting blood samples were obtained from 24 patients with rheumatoid arthritis and 20 controls. The activities of erythrocyte superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GSH-Px) and xanthine oxidase (XO) enzymes and malondialdehyde (MDA), oxidant resistant (OR) and non-enzymatic superoxide radical scavenger activity (NSSA) values were measured in both groups. Patients with RA had higher SOD and XO activities and MDA levels than did the controls. However, NSSA and OR levels were found to be decreased, and CAT and GSH-Px activities unchanged in the study group. Results suggest that excessive free radical production through the xanthine–xanthine oxidase system is the primary factor in rheumatoid arthritis, rather than an impaired antioxidant system. The therapeutic use of XO enzyme inhibitors and some antioxidants can be beneficial in this regard.

The effect of hand osteoarthritis on grip and pinch strength and hand function in postmenopausal women

The aim of the study was to investigate the effect of osteoarthritis on hand function in postmenopausal women. One hundred patients with hand OA and 70 healthy volunteers as controls were evaluated. Grip and pinch strength measurements and Dreiser’s functional index were used for hand function. Pain was assessed by a visual analog scale, and tenderness was assessed by palpation and scored, depending on the severity of tenderness, as 0, 1 or 2. Heberden’s and Bouchard’s nodules and joint involvement were also recorded. The number of patients with only distal interphalangeal joint involvement was 50 (50%), those with distal interphalangeal joint plus proximal interphalangeal joint involvement was 49 (49%), and those with carpometacarpal joint involvement numbered 18 (18%). The incidence of Heberden’s and Bouchard’s nodules was 85% and 36%, respectively. Eighty-six (86%) patients were suffering from pain and 57 were found to have tenderness. Grip and pinch strength was significantly lower (p<0.05) and Dreiser’s functional index score was significantly higher (p<0.001) in the study group (particularly in grade 4 OA). Grip strength was lower in hand OA patients with distal interphalangeal joint plus proximal interphalangeal joint involvement than in those with only distal interphalangeal joint and carpometacarpal joint involvement. Pinch strength was also lower in patients with distal interphalangeal joint plus proximal interphalangeal joint plus carpometacarpal joint involvement. The patients with Heberden’s and Bouchard’s nodules had lower grip and pinch strength than controls. Also, pain and tenderness had significant (p<0.05) effects on hand function. Dreiser’s total score ranged from 0 to 10 in 80 (80%) patients and from 11 to 20 in 20 patients. In conclusion, hand osteoarthritis contributes to hand dysfunction, mainly related to the severity of osteoarthritis, pain, joint involvement and the presence of nodules.

In vivo effects of meloxicam, celecoxib, and ibuprofen on free radical metabolism in human erythrocytes.

Abstract One of the major groups of chemical mediators involved in the inflammatory response is the prostaglandins, which are synthesized from arachidonic acid by the enzyme cyclooxygenase. The aim of this study is to compare the in vivo effects of celecoxib, meloxicam, and ibuprofen on the activities of catalase (CAT), glutathione peroxidase (GSHPx), superoxide dismutase (SOD) as well as malondialdehyde (MDA), and antioxidant potential levels (AOP) in human erythrocytes. Patients diagnosed as osteoarthritis were included in the study. Patients were treated with Celecoxib (200 mg/d) (n = 12), Meloxicam (15 mg/d) (n = 12), and Ibuprufen (1200 mg/d) (n = 9) for 21 days. SOD, CAT, GSHPx activities, MDA, and AOP levels were investigated in human erythrocyte haemolysates. SOD activity and AOP levels were significantly decreased in all NSAID groups when we compared the values before and after 21 days of celecoxib, meloxicam, ibuprofen treatment. There were no significant difference in CAT, GSHPx activities, and MDA levels before and after treatment in each group. Decreased SOD activities are thought to be related with the increased superoxide anion. Decreased AOP levels may indicate impairment in the total antioxidant defence system. These NSAIDs have similar effects on free radical metabolism on human erythrocytes; despite some difference in action mechanisms.

Relationship between chest expansion and respiratory muscle strength in patients with primary fibromyalgia.

Abstract In this paper the assessment of the relationship between chest expansion with maximal inspiratory (MIP) and expiratory pressures (MEP) in primary fibromyalgia (FM) syndrome is discussed. Chest expansion (CE) measurements, spirometric values, and MIP and MEP values in 30 female patients with primary FM are compared with 29 healthy age-matched female controls. Patients with FM had lower CE, MEP and MIP values than controls. CE correlated significantly with MIP and MEP values. There was no significant difference between groups in spirometric values. Our results indicate that patients with FM have impaired respiratory muscle strength, and measurement of CE may be a useful clinical parameter. Despite its limitations CE may reflect respiratory muscle strength. It is worth following up these data in a wider and controlled series, with ancillary tests in addition to the MIP and MEP.

Can mean platelet volume and red blood cell distribution width show disease activity in rheumatoid arthritis

AIM To evaluate the relationship between mean platelet volume (MPV) and red cell distribution width (RDW), and disease activity in rheumatoid arthritis (RA). PATIENTS & METHODS Hundred RA and 100 controls were included. RESULTS MPV and RDW were higher in RA (p < 0.0001). The cut-off levels of RDW and MPV were 14.8 and 10.4. Patients with RDW >14.8 had higher Disease Activity Score 28 (DAS28; p = 0.002) and pain score (p = 0.0007). RDW was positively correlated with DAS28 and pain. But, DAS28 and pain were not different between patients with MPV >10.4 and <10.4. CONCLUSION MPV and RDW were significantly higher in RA. RDW and MPV were similar to erythrocyte sedimentation rate and C-reactive protein to indicate inflammatory activity. RDW was correlated with pain and DAS28, but MPV was not associated with them.

The protective effects of acetylsalicylic acid on free radical production in cisplatin induced nephrotoxicity: an experimental rat model.

Abstract Cisplatin-induced nephrotoxicity is closely associated with an increase in lipid peroxidation. In several previous reports it was claimed that acetylsalicylic acid (ASA) shows its therapeutic potential as a free radical scavenger. The aim of the study was to investigate effects of ASA on cisplatin induced nephrotoxicity in an experimental rat model. Control animals (n:7) were administered 1 mL saline solution intraperitoneal (i.p.). Cisplatin group (n:7) was treated with a single dose of cisplatin i.p. (6 mg/kg), ASA group (n:7) was treated with i.p. (2.5 mg/kg) per day during the study, cisplatin plus ASA group (n:7) was administered single dose cisplatin i.p. (6 mg/kg) plus ASA (2.5 mg/kg) during 5 days. At the end of the study, Catalase (CAT), Glutathione Peroxidase (GSH-Px), Superoxide Dismutase (SOD), Nitric Oxide Synthase (NOS) enzymes activities and Malondialdehyde (MDA), Antioxidant Potential (AOP) levels were measured in both erythrocytes and renal tissues. Urea and creatinine levels and renal tissue necrosis in cisplatin plus ASA group were significantly lower than cisplatin group (p = 0.000, p = 0.014, p = 0.015). SODr activities and MDAr levels of cisplatin plus ASA group were also significantly lower than cisplatin group (p = 0.000, p = 0.029). These results show that cisplatin and ASA combination decreases the levels of urea and creatinine, reduces necrosis and improves antioxidant enzyme activities, MDA and AOP in rat kidney.

Obesity Related Measurements and Joint Space Width in Patients with Knee Osteoarthritis

Background The aim of this study is to analyze the relationship between body mass index and obesity related measurements and tibiofemoral joint space which have been the principal method of radiographic evaluation in progression and therapeutic trials of knee osteoarthritis. Methods Fifty-five female patients with the diagnosis of osteoarthritis in knees according to the criteria of American College of Rheumatology in knees were included in the study. The mean age of patients was 57,42+/-8,60(SD) years with a range of 42-77. Medial and lateral compartment joint space widths were measured on antero-posterior knee radiography. Body mass index, triceps, biceps, subscapular and suprailiac skinfold thickness, waist and hip circumference were measured. Body composition was determined by dual energy X-ray absorpsiometry (DEXA) (Norland XR 46) and total lean mass (g), total fat mass (g), trunk lean mass, trunk fat mass, abdomen lean mass, abdomen fat mass measurements were recorded. Results Patients with body mass index>30 were accepted as obese patients. According to these criteria 33 of the 55 patients were obese. Tibial medial compartment and tibial lateral compartment measurements of obese patients were significantly lower than nonobese patients (p=0,000, p=0,003 respectively). Body mass index was correlated with total lean mass, total fat mass, trunk fat mass, abdominal fat mass, leg fat mass. Tibial medial compartment and tibial lateral compartment space measurements were negatively correlated with body mass index. Conclusion: Our results revealed significant difference in both medial and lateral joint spaces of obese and nonobese patients with knee osteoarthritis. Medial and lateral joint spaces of obese patients were narrower than nonobese osteoarthritis patients. The more body mass index had the patients the narrower joint space they had displayed. However body composition analysis and obesity related measurements did not show additional correlation with tibial compartment measurement.

Prevalence of dermatophytosis in patients with rheumatoid arthritis

Abstract Objective. The prevalence of dermatophytic infections in rheumatoid arthritis is unknown. This study investigated the prevalence of dermatophytosis in patients with rheumatoid arthritis and the relationship between sulfasalazine, low-dose methotrexate and steroid therapy. Methods. We examined 53 consecutive patients with rheumatoid arthritis for evidence of dermatophytosis and compared them 55 with age- and sex-matched, nonimmunocompromised controls recruited from the low back pain population. Nail scrapings were obtained from the subjects, and the clinical diagnosis of dermatophytosis was confirmed with a potassium hydroxide preparation. Results. In 32% of the rheumatoid arthritis population we found dermatophytosis, compared with 16% of the control group, although statistical significant was only borderline. Tinea pedis was the most frequent type of dermatophytosis in both groups. The prevalence of dermatophytosis in patients receiving sulfasalazine, low-dose methotrexate, and steroid therapy was not found to be significantly increased. Conclusions. This study shows a slightly higher prevalence of dermatophytosis in rheumatoid arthritis population than in controls. Sulfasalazine, low-dose methotrexate, and steroid therapy had no effect on the prevalence of dermatophytic infections in patients with rheumatoid arthritis.

Sleep quality in patients with chronic low back pain: A cross-sectional study assesing its relations with pain, functional status and quality of life

OBJECTIVE The aim of this study was to investigate sleep quality in patients with chronic low back pain (CLBP) and its relationship with pain, functional status, and health-related quality of life (HRQOL). METHODS Two hundred patients with CLBP aged 20-78 years (mean: 50.2 years) and 200 sex- and age-matched pain-free healthy controls (HCs) aged 21-73 years (mean: 49.7 years) were included in this study. After lumbar region examination, in patients, pain was evaluated with the Short Form-McGill Pain Questionnaire (SF-MPQ), functional capacity with the Functional Rating Index (FRI), and health-related quality of life with the Short Form-36 (SF-36). The Pittsburgh Sleep Quality Index (PSQI) was used to evaluate sleep quality of both groups.The sleep quality was compared between the patients and HCs. In patients with CLBP, its relations with pain, functional status and HRQOL were also investigated. RESULTS The patients had significantly higher total scores (8.1 ± 4.3, 4.6 ± 3.4, P< 0.001, respectively) and subscale scores (P< 0.001) for PSQI compared to HCs. The groups were only similar in use of sleeping medication (P> 0.05) Among the patients, sleep quality was worse in women, in the patients with complaints more than 11 years, in the patients with low back and two leg pain (P< 0.05). Mean scores of the FRI, SF-MPQ, and visual analog scale in the patients were 8.5 ± 3.0, 16.7 ± 8.0, 6.9 ± 1.2, respectively. The PSQI total scores of patients were positively related with both SF-MPQ and FRI scores (P< 0.001). Also, there were negative relationships between the physical component summary score of the SF-36 and all subscale scores of the PSQI, without sleep duration of PSQI (P< 0.001). CONCLUSION The sleep quality of patients with CLBP was worse compared to HCs, and there were positive relations between the sleep quality with pain and functional status. Also, the poor sleep quality had negative effect on the physical component of quality of life.