Biomedical subjects

A Karaman

Publications and source records attributed to A Karaman.

15 recordsLinked to original sources

PubMed2006

The effects of methylene blue on lung injury in septic rats.

PURPOSE: We aimed to investigate the effects of methylene blue (MB) on NO production, myeloperoxidase (MPO) activity, antioxidant status and lipid peroxidation in lung injury during different stages of sepsis in rats. MATERIAL AND METHODS: Rats were randomly divided into 4 groups (n = 20): group C, sham operated; group CMB, sham operated and receiving MB (25 mg/kg, i.p.); group S, sepsis; group SMB, sepsis and receiving MB (25 mg/kg, i.p.). Sepsis was induced by cecal ligation and puncture (CLP). The MB dose was administered after CLP. Each group was subdivided into two subgroups (n = 10) which were sacrificed at 9 or 18 h after the surgical procedure. The levels of superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GSH-PX) and MPO activity, total nitrite/nitrate and malondialdehyde (MDA) in the lung tissue were measured. Lung injury was graded from 1 (injury to 25% of the field) to 4 (diffuse injury) by the pathologist. RESULTS: In group SMB, while SOD and CAT increased in both early and late sepsis periods, GSH-PX increased significantly only in the early sepsis period when compared with group S. Increase in lung MPO activity after CLP-induced sepsis was prevented by MB administration. MB significantly decreased to nitrite/nitrate and MDA levels both in early and late sepsis periods when compared with group S (p < 0.05). Group S showed a marked increase in neutrophil infiltration into the interstitial space and thickening of the alveolar septa, whereas the alveolar damage score was lower in the SMB group (p < 0.05). CONCLUSION: MB reduced the MPO activity and lipid peroxidation by both decreasing oxidative stress and NO overproduction in the lungs, which resulted in the attenuation of lung injury after CLP-induced sepsis in rats.

Animals↗

PubMed2006

Quantitative magnetic resonance imaging of brainstem volumes, plaques, and surface area in the occipital regions of patients with multiple sclerosis.

PURPOSE: To determine brainstem volumes, number of plaques, and surface areas in the occipital lobes of patients with relapsing remitting multiple sclerosis (RRMS) and secondary progressive multiple sclerosis (SPMS), and to investigate whether there is any correlation between brainstem volume and the number/surface areas of plaque in the occipital lobes. MATERIAL AND METHODS: Magnetic resonance imaging was obtained on 14 relapsing-remitting (RR) and 13 secondary progressive (SP) MS patients and 26 female control subjects. The Cavalieri method was used by modern design stereology to measure brainstem volume. The point-counting grid was used to evaluate sclerotic plaque surface areas in the occipital lobe. The number of plaques in the imaging section was calculated. RESULTS: Brainstem volumes for RR and SP with multiple sclerosis and control subjects were 3647 mm3, 3515 mm3, and 4517 mm3, respectively. Mean number of plaques in the right-left occipital lobe was found to be 2.7-3.4 in RR-MS and 5.2-2.8 in SP-MS. Mean plaque surface area in the right-left occipital lobe was determined to be 58.52-88.24 mm2 in RR MS and 124.3-64.82 mm2 in SP MS. Brainstem volumes were significantly reduced in both groups of patients with MS compared to controls (P < 0.01). CONCLUSION: Magnetic-resonance-estimated volume and surface area values in multiple sclerosis may facilitate our understanding of the clinical situation of patients and provide a simple index for evaluating therapeutic efficiency.

Adult↗

PubMed2004

TAR syndrome with annular pancreas and anal atresia - a case report.

TAR syndrome is manifested by the presence of hypomegakaryocytic thrombocytopenia and the bilateral absence of radii. An 8-day-old female newborn was referred to our clinic with diagnosis of TAR syndrome and symptoms of intestinal obstruction. On perineal examination she also had anal atresia with rectovestibular fistula. Because of persistent bile-stained drainage from the nasogastric tube, an upper gastrointestinal contrast study was performed and partial duodenal obstruction was detected. At operation, an annular pancreas was encountered and side-to-side duodenoduodenostomy was performed. A small number of gastrointestinal system malformations associated with TAR syndrome has been reported. Our case is unique; the association with annular pancreas and anal atresia with rectovestibular fistula has never been previously reported.

Abnormalities, Multiple↗

PubMed2004

Comparison of closed-tube thoracostomy and open thoracotomy procedures in the management of thoracic empyema in childhood.

PURPOSE: There is still an argument concerning the correct management of pleural empyema. The aim of this study is to compare the effectiveness of closed-tube thoracostomy and open thoracotomy procedures in the management of empyema in children. METHODS: This is a prospective study of 30 patients with parapneumonic empyema who were managed randomly either by closed-tube thoracostomy or open thoracotomy procedures. The two procedures were compared based on the respective times to achieving normal body temperature and breath rates, duration of tube drainage, length of hospitalization, and complication rates. Both groups were also assessed by comparing tube drainage duration, pleural fluid pH, agent pathogen and glucose level. RESULTS: Average tube duration was 7.5 +/- 1.1 days and average hospital stay was 9.5 +/- 1.5 days in the open thoracotomy group. In the closed tube thoracostomy group tube, duration was 13.8 +/- 2.3 days and average hospital stay 15.4 +/- 2.3 days. In the open thoracotomy group 73.3% of the patients had achieved normal body temperature and 66.7 % had a normal breath rate within the first 48 hours. In the closed tube thoracostomy group these rates were 40% and 20%, respectively. In both groups, tube drainage duration was found to be longer in patients whose pleural fluid pH was < 7.2. CONCLUSION: The authors conclude that open thoracotomy is a safe, efficient, and easy method of treatment for pleural empyema in children. It was also observed that pleural fluid pH level is the most important prognostic criteria in pleural empyema.

Child↗

PubMed2004

Parry-Romberg syndrome: a possible association with borreliosis.

Progressive facial hemiatrophy or Parry-Romberg syndrome is a rare entity characterized by unilateral atrophy of the skin, subcutaneous tissue and the underlying bony structures. This syndrome has many features of linear scleroderma 'en coup de sabre' but is distinguished by more extensive involvement of the lower face with only slight cutaneous sclerosis. The onset typically occurs in childhood or young adult years. The aetiology of the condition is unknown. A case of progressive hemifacial atrophy occurring in a 30-year-old woman is reported, in which the aetiology is thought to be Lyme disease, a borrelial infection first recognized in 1975 that has since become the most commonly reported vector-borne disease in the world. No sure link is established between these two disease states, but their coincident occurrence in this patient is noted. We hypothesize that the aetiology of Parry-Romberg syndrome involves borreliosis.

Adult↗

PubMed2002

Assessment of depression in subjects with psoriasis vulgaris and lichen planus.

AIM: The aim of this study was to investigate the frequency of depressive symptoms in psoriasis vulgaris and lichen planus and to evaluate the relationship between the Beck depression scores and the Psoriasis Area and Severity Index (PASI) scores of subjects with psoriasis vulgaris. SUBJECTS: The study involved 120 subjects attending the dermatology clinic of Izmir Ataturk Training Hospital (Izmir, Turkey) and comprised 50 subjects with psoriasis vulgaris, 30 with lichen planus and 40 healthy control subjects. RESULTS: Subjects with psoriasis vulgaris, lichen planus and controls had depression scores of 58%, 53% and 20%, respectively. The Beck depression scores of patients with psoriasis vulgaris were significantly higher than those of the control group. The PASI scores showed a correlation with Beck depression scores. Smoking and drinking were very common in subjects with psoriasis vulgaris. There was no correlation between the duration of illness and depressive symptoms. CONCLUSIONS: This study confirms the importance of depressive symptoms in two common dermatological diseases. It is important to recognize this association as it affects both clinical outlook and response to treatment.

Adult↗

PubMed2001

The effect of caffeic acid phenethyl ester on ischemia-reperfusion injury in comparison with alpha-tocopherol in rat kidneys.

Oxygen-derived free radicals have been implicated in the pathogenesis of renal injury after ischemia-reperfusion. Caffeic acid phenethyl ester (CAPE), an active component of propolis extract, exhibits antioxidant and anti-inflammatory properties. To determine whether CAPE offers any advantage over alpha-tocopherol, we compared their effects on an in vivo model of renal ischemia-reperfusion injury in rats. CAPE at 10 micromol/kg or alpha-tocopherol at 10 mg/kg was administered intraperitoneally before reperfusion. Acute administration of CAPE suppressed ischemia-reperfusion induced renal lipid peroxidation and tissue injury more than alpha-tocopherol. CAPE may therefore offer a therapeutic advantage in acute injury settings.

Animals↗

PubMed2001

Effects of caffeic acid phenethyl ester and epidermal growth factor on the development of caustic esophageal stricture in rats.

BACKGROUND/PURPOSE: An experimental study was performed to modify the healing response in caustic esophageal burns to prevent stricture development. Two different agents with different modes of actions, caffeic acid phenethyl ester (CAPE) and epidermal growth factor (EGF), were studied. CAPE has antiinflammatory, immunomodulatory, antioxidant, and antimitotic properties. EGF has known properties in supporting wound healing and in protecting esophagus from injuries. METHODS: The model described by Gehanno and its modification by Liu was used to create standard esophageal burns with 50% NaOH. The study was performed with 76 rats in 4 main groups (sham, CAPE, EGF, and control) and 2 subgroups in each for 5 and 28 days of observation. Efficacy of treatment was assessed in 28-day subgroups by measuring weight gain, contrast esophagograms on day 27, histologic evaluation by measuring stenosis index (wall thickness/lumen diameter), and collagen deposition, and biochemically by determining tissue hydroxy proline (OHP) content. RESULTS: In the end of the study, increase rates of mean body weights of the animals in the 28-day subgroups were as follows: sham, 30%; CAPE, 23%; EGF, 22%; and control, 14%. Although all the animals in subgroups significantly gained weight, the mean weight gain was significantly low in controls when compared with sham, CAPE, and EGF groups (P <.05). Contrast esophagograms on day 27 showed no stenosis in the sham, mild stenosis in CAPE and EGF, and severe stenosis with proximal dilatation in controls. Stenosis indices of the subgroups were as follows: sham, 0.29; CAPE, 0.41; EGF, 0.41; control, 0.84. Index was significantly higher in controls (P <.05). Collagen accumulation scores in the esophageal wall were as follows: Sham, 0.0; CAPE, 0.87; EGF, 0.30; control, 2.70. Scores also were significantly higher in controls (P <.05). Tissue (OHP) levels were as follows (mg/g dry tissue): Sham, 1.48; CAPE, 1.53; EGF, 1.90; control, 4.01. Production of OHP was significantly higher in controls. CONCLUSIONS: The results of the parameters in the study indicate that administration of CAPE and EGF has beneficial effects in the prevention of caustic esophageal strictures. Those effects of CAPE may occur through its antiinflammatory, immunomodulatory, and antioxidant properties, and EGF may occur through its induced proliferative properties on the esophagus.

Animals↗

PubMed2000

Testicular nitric oxide levels after unilateral testicular torsion/detorsion in rats pretreated with caffeic acid phenethyl ester.

Nitric oxide (NO) plays an important role in modulating blood flow in normal and in several pathological conditions, and its levels seem to change with ischemia-reperfusion injuries. Caffeic acid phenethyl ester (CAPE), an active component of propolis, exhibits antioxidant properties. This experimental study was designed to determine the changes in NO levels and the effect of CAPE on NO levels after testicular torsion/ detorsion in rats. Thirty-five adult male albino rats were divided into four groups: sham operation (n = 8), torsion (n = 9), saline/detorsion (n = 9), and CAPE/detorsion (n = 9). Rats in the sham operation group were killed after the testes were handled without torsion. Rats in the torsion group were killed after 720 degrees clockwise testicular torsion for 2 h. CAPE was administered 30 min before detorsion in the CAPE/detorsion group and saline was administered in the saline/detorsion group. After 4 h of testicular detorsion in both of these groups, the rats were killed and bilateral orchiectomy was performed to determine the tissue levels of NO. The level of NO in the torsion group (113.77 +/- 33.18 nmol/g protein) was significantly higher than that of the sham operation group (64.53 +/- 29.64 nmol/g protein). In the saline/detorsion group, the NO level (31.26 +/- 12.58 nmol/g protein) was significantly lower than in the torsion and sham operation groups. CAPE administration in the CAPE/detorsion group seemed to raise the NO level (72.63 +/- 23.87 nmol/g protein) above the level of the sham operation group. Contralateral testes were not affected by the torsion/detorsion processes performed on the ipsilateral testes. These results show that NO levels increase with torsion and decrease with detorsion. CAPE administration seems to increase tissue NO levels and this may be important for protecting the testes from torsion/detorsion injuries.

Animals↗

PubMed2000

Plasma superoxide dismutase activity and malondialdehyde level correlate with the extent of acute appendicitis.

Although the mechanism of acute appendicitis (AA) is partly understood, the progression following the onset of inflammation has not yet been clarified. To determine oxidative activities in the plasma of patients with AA, superoxide dismutase (SOD) activities and malondialdehyde (MDA) levels were measured in samples from 31 patients diagnosed as having AA and 10 otherwise healthy children with inguinal pathologies. The patients with AA were divided into three subgroups: acute focal (AFA) (n = 8), acute suppurative (ASA) (n = 9), and acute perforated appendicitis (APA) (n = 14), according to the intraoperative findings and histopathologic examination. SOD and MDA were compared statistically between these subgroups and between them and the control group. Additionally, mean leukocyte counts of each group were determined and the differences between the groups were evaluated. Both SOD and MDA were significantly higher in the ASA and APA groups compared to controls and AFA group. The mean leukocyte numbers of the ASA and APA groups were significantly higher compared to the AFA group. Based to these results, it may be speculated that oxygen free radicals (OFR) may play an important role in the extent of AA. To prevent the hazardous effects of OFR, the organism may increase SOD and other antioxidant enzyme levels and/or activities.

Acute Disease↗

PubMed2000

Lipoid proteinosis.

A 21-year-old man presented with a complaint of hoarseness as well as lesions along the eyelids and on his knees, elbows, and fingers. Hoarseness had developed in childhood, followed by lesions along the eyelids and on the elbows and fingers. He had developed lesions on the knees, feet, scrotum, penis, and axilla over the last 2 years. His parents were relatives, but nobody in the family showed similar features. His physical examination was normal. On dermatologic examination, there were beaded papules along the eyelids and small, yellow-white infiltrations on the tongue, buccal mucosa, palate, scrotum, and penis (Fig. 1). His tongue was firm and its mobility was limited. He also had infiltration of the frenulum (Fig. 2) and warty and hyperkeratotic papular and nodular lesions on the hands, knees, elbows (Fig. 3), and axilla. The laboratory findings and laryngoscopic examination were normal. Ophthalmologic, neurologic, and psychiatric examinations were also normal. Electroencephalogram (EEG), electromyogram (EMG), craniography, and cranial computed tomography (CT) scanning revealed no abnormality. The histopathologic examination of the skin biopsy specimens obtained from the axilla, elbow, and dorsum of the hand showed hyperkeratosis and periodic acid-Schiff-positive (PAS(+)) staining hyaline material around the dermal capillaries and sweat glands, and confirmed the diagnosis of lipoid proteinosis.

Adult↗

PubMed2000

Degos' disease.

A 47-year-old woman presented with slightly pruritic, burning lesions on her submammary area and legs of 3.5 years' duration. Similar lesions had appeared on her arms and feet. She was hospitalized at the Pulmonary Diseases Hospital, Izmir, with a complaint of thoracic pain, and was diagnosed with nonspecific pleuritis by pulmonary X-ray, thoracic computed tomography (CT) scanning, bacterial cultures of phlegm, and pleural biopsy examination. Fifteen days after leaving hospital, she was admitted to the Surgical Clinic of Atatürk Training Hospital, Izmir, with a complaint of severe abdominal pain, and diagnosed with nonspecific peritonitis. On dermatologic examination, she had multiple, scattered papules (2-3 mm in diameter), with a typical, central, white, porcelain-like zone of atrophy, on the trunk (Fig. 1), legs (Fig. 2), and arms. The lesions were encircled by a slightly raised erythematous border. Some of the lesions had coalesced giving polycyclic atrophic areas and ulcerations. Histopathologic examination of the skin biopsy specimen showed hyperkeratosis, epidermal atrophy, dermo-epidermal separation, edema, and necrosis in the papillary dermis (Fig. 3). Fibrinoid necrosis and thrombosis were seen in the papillary dermis and in the vessels below the lesions. The patient was diagnosed with Degos' disease from these clinical and histopathologic findings. She was treated with anti-inflammatory drugs. One year later, the patient was hospitalized at the Department of Internal Medicine of Atatürk Training Hospital, Izmir, with a diagnosis of pericarditis and pleuritis.

Diagnosis, Differential↗

PubMed2000

Paratesticular rhabdomyosarcoma in a neonate.

A 13-day-old boy presented with left scrotal tumor and coronary hypospadias. Left radical orchiectomy was performed. Histological diagnosis was embryonal-type paratesticular rhabdomyosarcoma. To the authors' knowledge, this is the first reported case of paratesticular rhabdomyosarcoma in a neonate in English-language literature. Also, the association of a testicular tumor with hypospadias has not been noted.

Humans↗

PubMed2000

An alternative way to cover ventral penile skin defect in Mathieu technique.

Mathieu technique is used satisfactorily in distal penile hypospadias without chordee or with minimal chordee. After using this technique, a large defect may sometimes appear on the ventral surface of the penis. To cover the defect, a few techniques, including preputial island flap, Byar's flap and Ombrédanne-Nesbit's flap, are used. We describe a new flap to cover the defect more cosmetically. Twenty-four patients ranging in age from one year to 14 years (median age 6.5 years) were operated on. In the patients for whom the defect could not be covered primarily, a longitudinal incision was made along the midline through the penile shaft skin from penile radix up to the border of preputial skin. The relaxed penile skin, which was incised on the dorsal surface, could be approached and sutured easily on the ventral surface without stretching. The new defect that developed on the dorsal surface was closed with the prepuce matching the defect. Nine patients, two with chordee and seven without chordee, underwent this technique. The cosmetic and functional results were excellent in all patients and none of the patient's parents complained about the cosmetic aspect. Only one fistula complication, which healed spontaneously, developed on the 20th postoperative day. Considering these results, we may conclude that excellent cosmetic results can be accomplished by the use of this flap technique.

Adolescent↗

PubMed1999

Caffeic acid phenethyl ester prevents intestinal reperfusion injury in rats.

BACKGROUND/PURPOSE: Ischemia-reperfusion injury is encountered frequently in conditions that diminish intestinal blood flow. Caffeic acid phenethyl ester (CAPE), which is a specific component of the honeybee hive product propolis, exhibits potential antioxidant properties. This experimental study was designed to determine the effect of CAPE on ischemia-reperfusion injury in rat intestine. METHODS: Fifty rats were divided into 5 groups; sham (SH), saline ischemia (SI), saline reperfusion (SR), CAPE ischemia (CI), and CAPE reperfusion (CR). Either CAPE, 10 micromol/kg, or saline was administered intraperitoneally 30 minutes before ischemia. Intestinal ischemia for 30 minutes and reperfusion for 60 minutes were applied. Ileum specimens were obtained to determine the tissue levels of malondialdehyde, superoxide dismutase, catalase, and histological changes. RESULTS: Malondialdehyde levels in the CR group did not increase after reperfusion when compared with the CI group. However, statistically significant differences were observed between the SR and SI groups. Additional mucosal injury in the CR group when compared with the CI group was not observed. Whereas, there was a statistically significant increase in mucosal injury in the SR group. Reperfusion did not cause further injuries through both biochemical and histological parameters in the CR group. CONCLUSIONS: Results of this study showed that prophylactic administration of CAPE in ischemic condition prevents reperfusion injuries by eliminating oxygen radicals and inhibiting polymorphonuclear leukocyte infiltration. CAPE may be useful in combating the diseases of oxidative stress.

Animals↗