Vitamin E regulates changes in tissue antioxidants induced by fish oil and acute exercise

PURPOSE

Prooxidant effects of fish oil supplementation could unfavorably affect the cardiovascular benefits of fish oil. We tested the effects of 8 wk vitamin E cosupplementation with fish oil on antioxidant defenses at rest and in response to exhaustive exercise in rats.

METHODS

Rats (N = 80) were divided into fish oil, fish oil and vitamin E (FOVE), soy oil, and soy oil and vitamin E (SOVE) supplemented groups. For the vitamin E supplemented rats, corresponding groups (FOVE-Ex and SOVE-Ex) performed an acute bout of exhaustive exercise after the supplementation period.

RESULTS

Fish oil supplementation increased the activity of catalase, glutathione peroxidase, and glutathione-S-transferase in the liver and red gastrocnemius (RG) muscle. Fish oil decreased liver total glutathione (TGSH) levels. Vitamin E supplementation decreased antioxidant enzyme activities to levels at or near those in SOVE in a tissue specific pattern. Vitamin E increased TGSH in liver, heart, and RG. Regression analysis showed TGSH to be a negative determinant of protein oxidative damage as measured by protein carbonyl levels in both liver and RG. Catalase activity was associated with liver lipid peroxidation as measured by thiobarbituric acid-reacting substances. The exercise-induced decrease in hepatic TGSH tended to be less in FOVE versus SOVE. Exhaustive exercise also modulated tissue antioxidant enzymes.

CONCLUSIONS

Vitamin E supplementation markedly decreased fish oil induced antioxidant enzyme activities in all tissues. Sparing of glutathione may be an important mechanism by which vitamin E decreased tissue protein oxidative damage.

Cysticercosis of the optic nerve

Cysticercosis of the optic nerve has been reported only twice in the literature. A case of optic nerve cysticercosis in a 50-year-old woman with atypical optic neuritis is reported. Computerized tomography showed a thickened left optic nerve with a ring-enhancing lesion containing an eccentric nodule. An enzyme-linked immunosorbent assay test for cysticercosis further established the diagnosis. The patient was treated with oral prednisolone and albendazole, with no improvement in vision.

Subacute sclerosing panencephalitis presenting as optic neuritis

Subacute sclerosing panencephalitis (SSPE) is a rare progressive neurologic disease affecting both grey and white matter of the brain in children and young adults. One such case which involved the visual system is described here.

Role of computed tomography in spinal trauma

Twenty patients admitted for spinal trauma were studied with computed tomography (CT) scan. All the patients had initial routine plain radiographs in the anteroposterior and lateral views. Ten patients sustained injury due to fall from height, 7 suffered road side accident, 2 had injury due to fall of weight on back and one suffered due to slip on floor. Twelve patients had injury at multiple levels. Twenty-four vertebral bodies were involved in 20 patients, 10 had fracture of posterior elements only. Neurological deficit occurred in 16 patients. CT scan provided more information than plain radiography, which missed vertebral body fracture in 2 out of 24 instances and spinal canal compromise in 7 out of 12 patients. CT scan detected posterior element injuries better and in greater detail in all cases.

Hippocampal field CA1 interneuronal nociceptive responses: modulation by medial septal region and morphine

A majority (24/32) of the extracellularly recorded dorsal hippocampus field CA1 putative GABAergic interneurons were excited in conjunction with theta activation on formalin injection (5%, 0.05 ml, s.c. into right hind-paw) in urethane (1.0 g/kg, i.p.)-anaesthetized rats. An increase in activity was observed to the 10th minute (n=24) and also at later time-periods at which a few of the neurons were recorded following injection of formalin. The mean peak increase in activity within 5 min of formalin injection was 6.43+/-0.81 Hz over the average background activity for these neurons (6.46+/-1.04 Hz). Of 24 neurons, 14 exhibited an increase in activity which was rhythmically modulated with theta. With a concurrent administration of formalin and morphine (5 mg/kg, i.p.), the presumed interneurons recorded displayed an initial increase in discharge rate (mean peak increase within 5 min of 6.95+/-1.10 Hz) which then declined with a decrease in theta activity. The effect of concurrent morphine was naloxone reversible. Morphine administration alone resulted in an immediate decrease in the interneuronal firing rate. In presence of the medial septal region lesions, formalin did not evoke an excitation of intemeurons or theta activation. Further, such lesions prevented the decrease in intemeuron activity to morphine administration. The above data are consistent with the notion that (i) the field CA1 interneurons participate in a noxious stimulus-induced and medial septal region mediated pyramidal cell suppression, and (ii) morphine affects CA1 nociceptive responses partly in a fashion consistent with the effect of the drug on septohippocampal neural network processing.

Multiple foreign bodies in the tracheobronchial tree

Inhaled foreign bodies in respiratory tract are usually single. Multiple foreign bodies in the tracheobronchial tree are extremly rare. A nine-month-old infant with four pieces of belelnut in right bronchus is reported and its management is discussed.

An assessment of the Standardized Assessment of Personality as a screening instrument for the International Personality Disorder Examination: a comparison of informant and patient assessment for personality disorder

BACKGROUND

The International Personality Disorder Examination (IPDE) has been developed as a standardized interview for personality disorders. While it has good psychometric properties, its length makes it difficult to use in the community in population research, particularly outside psychiatric settings. The informant-based Standard Assessment of Personality (SAP), which has been in use since 1981, could serve as a valid screen to detect likely personality disordered individuals who would then receive a definitive diagnosis by IPDE. This study aimed to compare the two instruments in their capacity to detect personality disorder according to ICD-10 taxonomy and to estimate the efficiency of the use of the two together in a case-finding exercise.

METHOD

Ninety psychiatric out-patients in Bangalore, India, were assessed for personality disorder using the two methods. Assessment was conducted by a pair of trained interviewers in random order and by random allocation to interviewer.

RESULTS

Overall agreement between the two instruments in the detection of ICD-10 personality disorder was modest (kappa = 0.4). The level of agreement varied according to personality category, ranging from kappa 0.66 (dependent) to kappa 0.09 (dyssocial). The SAP proved to have a high negative predictive value (97%) for IPDE as the gold standard, suggesting its potential as a screen in samples where the expected prevalence of personality disorder is low.

CONCLUSION

A two-stage approach to epidemiological studies of personality disorder may be practicable.

Cytokine-induced glucose uptake in skeletal muscle: redox regulation and the role of alpha-lipoic acid

In L6 myotubes, glucose uptake stimulated by interferon (IFN)-gamma or lipopolysaccharides (LPS) and a combination of LPS, IFN-gamma, and tumor necrosis factor (TNF)-alpha was inhibited by the antioxidant pyrrolidinedithiocarbamate and potentiated in reduced glutathione (GSH)-deficient cells. Also, the stimulatory effect of LPS and IFN-gamma individually, and of a combination of LPS, IFN-gamma, and TNF-alpha, on glucose uptake was associated with an increased level of intracellular oxidants (dichlorofluorescein assay) and loss of intracellular GSH. Study of the individual effects of LPS, IFN-gamma, and TNF-alpha as well as of a combination of the three activators provided evidence against a role of nitric oxide in mediating the stimulatory effect of the above-mentioned agents on glucose uptake. We also observed that the insulin-mimetic nutrient alpha-lipoic acid (LA; R-enantiomer) is able to stimulate glucose uptake in cytokine-treated cells that are insulin resistant. This study shows that cytokine-induced glucose uptake in skeletal muscle cells is redox sensitive and that, under conditions of acute infection that is accompanied with insulin resistance, LA may have therapeutic implications in restoring glucose availability in tissues such as the skeletal muscle.

A study of platelet serotonin receptor in mania

BACKGROUND

Serotonergic (5-HT) dysfunction has been hypothesized in mania; however platelet studies on the 5-HT uptake rate and the 5-HT transporter have revealed inconsistent results. To the best of our knowledge no studies have been conducted on the 5-HT2 receptor status in mania.

METHODS

We determined density (Bmax) and dissociation constant (Kd) of 5-HT2 receptors in the platelets of 29 normal control and 29 manic subjects using 125I-ketanserin as the binding radioligand. The manic patients were assessed for the same after 14 days of treatment with lithium (n = 14) and after return to premorbid levels of functioning (n = 5).

RESULTS

There were no significant differences in the Bmax (3.51 +/- 3.04 vs. 3.14 +/- 3.44 fmol/mg protein, p = ms) values between normal control and manic subjects. In comparison to the baseline values Bmax at day 14 (3.49 +/- 3.68 vs. 2.18 +/- 1.90 fmol/mg protein, p = ns) and following recovery (1.17 +/- 0.85 vs. 1.29 +/- 1.13 fmol/mg protein, p = ns) did not show any significant difference.

CONCLUSIONS

Our findings preliminarily suggest that the platelet 5-HT2 receptor is neither a state marker nor a trait marker in mania; however studies on the 5-HT2 receptor using positron-emission tomography ligands will help in conclusively ruling out the involvement of this receptor in mania.

Alpha-lipoic acid supplementation: tissue glutathione homeostasis at rest and after exercise

Antioxidant nutrients have demonstrated potential in protecting against exercise-induced oxidative stress. alpha-Lipoic acid (LA) is a proglutathione dietary supplement that is known to strengthen the antioxidant network. We studied the effect of intragastric LA supplementation (150 mg/kg, 8 wk) on tissue LA levels, glutathione metabolism, and lipid peroxidation in rats at rest and after exhaustive treadmill exercise. LA supplementation increased the level of free LA in the red gastrocnemius muscle and increased total glutathione levels in the liver and blood. The exercise-induced decrease in heart glutathione S-transferase activity was prevented by LA supplementation. Exhaustive exercise significantly increased thiobarbituric acid-reactive substance levels in the liver and red gastrocnemius muscle. LA supplementation protected against oxidative lipid damage in the heart, liver, and red gastrocnemius muscle. This study reports that orally supplemented LA is able to favorably influence tissue antioxidant defenses and counteract lipid peroxidation at rest and in response to exercise.

Morphine reversed formalin-induced CA1 pyramidal cell suppression via an effect on septohippocampal neural processing

We have investigated the effect of morphine on (i) dorsal hippocampus field CA1 nociceptive response to a formalin injection, and (ii) septohippocampal neural processing. Extracellular recordings were made in urethane (1.0 g/kg)-anaesthetized rats. Previously, we reported that formalin (5%, 0.05 ml, s.c.) injection into a hindpaw evoked, in the CA1 field, a "signal-to-noise processing", i.e. a selective excitation of a few pyramidal cells with high spontaneous extracellular activity against a background of widespread pyramidal cell suppression accompanied by an increase in period of rhythmic slow activity. In the present study, morphine administered i.p. concurrent to a formalin injection reversed the pyramidal cell suppression in conjunction with a decrease in the period of evoked rhythmic slow activity. The effect was dose dependent and was prominent at the dose of 5 mg/kg. This dose, administered as a pretreatment, also truncated CA1 pyramidal cell suppression or excitation to a formalin injection. Furthermore, the drug decreased the power and frequency of the posterior hypothalamus-supramammillary region stimulation-evoked hippocampal field CA1 rhythmic slow activity. Such an effect was observed in a time-frame parallel to the decline in the period of formalin injection-induced field CA1 rhythmic slow activity. However, morphine sulphate administration per se did not alter pyramidal cell excitability or extracellular activity. Together, the above findings are consistent with the notion that morphine influences dorsal hippocampus field CA1 pyramidal cell suppression partly via an effect on the septohippocampal neural processing. However, the effect of the drug does not involve a change in the pyramidal cell basal extracellular responses. The effect of morphine on septohippocampal neural processing might be functionally relevant to the influence of the drug on the affective-motivational component of pain.

Haemodynamic effects of leg raising in patients undergoing coronary artery bypass grafting

Twenty patients undergoing elective coronary artery bypass grafting were studied prospectively to evaluate the haemodynamic effects of passive leg raising. The patients were divided into two groups: those having good left ventricular function with ejection fraction of 0.50 or more (group I, n = 10) and those having poor left ventricular function with ejection fraction of upto 0.35 (group II, n = 10). Morphine-based anaesthetic technique was used and standard haemodynamic measurements were obtained at following stages: (1) control--20 to 30 min after induction of anaesthesia; (2) one minute, and (3) five min after raising both the legs; (4) one min, and (5) five min after the legs were repositioned. In group I, heart rate decreased from 71 +/- 9 to 66 +/- 8 beats/min (p < 0.001) at stage 1 and persisted throughout the study period. This was accompanied by a decrease in cardiac index, although, the statistical significance was achieved at stage 3 and 4 only. The haemodynamic changes observed in group II were of more severe magnitude. The heart rate decreased from 90 +/- 13 to 84 +/- 13 beats/min at stage 1 (p < 0.05) and persisted throughout the study with maximum decrease of 14 percent occurring at stage 3. The cardiac index decreased significantly from 2.4 +/- 0.3 to 2.0 +/- 0.5 L/min/m2 (p < 0.05) at stage 1. This persisted throughout the study except that it recovered at stage 4. The maximum decrease in cardiac index (20%) occurred at stage 2. In addition, systemic vascular resistance increased significantly from 1458 +/- 255 to 1830 +/- 420 dyne.sec.cm-5 (p < 0.05) at stage 1 and persisted throughout the study period. We conclude that passive leg raising should be undertaken with caution in patients with coronary artery disease especially in those who have poor left ventricular function.

Stereotactic microelectrode-guided posteroventral pallidotomy and pallidal deep brain stimulation for Parkinson's disease

Three patients underwent stereotactic posteroventral pallidotomy, and 1 patient underwent pallidal deep brain stimulation, for medically intractable symptoms of advanced Parkinson's disease, characterized by peak-dose levodopa dyskinesias, wearing-off fluctuations, tremor, rigidity and bradykinesia. Surgery was performed stereotactically under local anaesthesia, with eventual target coordinates derived from a combination of magnetic resonance imaging (MRI), coregistration with an electronic brain atlas, intraoperative microelectrode neuronal recordings and microstimulation before lesioning or placement of a deep brain stimulator was done. Assessment was made at baseline preoperatively and at 3-month intervals postoperatively, with Unified Parkinson's Disease Rating Scale (UPDRS) and Core Assessment Program for Intracerebral Transplantation (CAPIT) scoring. All patients improved in dyskinesia, tremor, rigidity and bradykinesia contralateral to the lesion side, but also on the ipsilateral side to a lesser extent. The improvement was largely seen in the 'off' state: UPDRS by 41%, and CAPIT by 19% on the contralateral side. 'On' freezing was not helped. There were no deaths and no visual complications, but there was one complication of a delayed contralateral upper limb dystonia after pallidotomy. The 1 patient with pallidal deep brain stimulation (DBS) obtained similar improvement as those with pallidotomy. Posteroventral pallidotomy and pallidal stimulation improves all the cardinal features of Parkinson's disease, and effectively ameliorates levodopa dyskinesias.

Spectrum of breast disease in young females: a retrospective study of 1315 patients

A total of 1315 breast lesions seen in women up to 40 years of age were registered in the files of Pathology Department. Out of these 807 were benign and 508 malignant lesions. Breast carcinoma was very rare up to second decade of life but its incidence progressively increased with age. Among benign tumours fibroadenomas were the commonest tumours. This study shows a higher incidence of inflammatory diseases and malignant tumours in young females as compared to the reports from the West.

Skeletal muscle and liver lipoyllysine content in response to exercise, training and dietary alpha-lipoic acid supplementation

In human cells, alpha-lipoic acid (LA) is present in a bound lipoyllysine form in mitochondrial proteins that play a central role in oxidative metabolism. The possible effects of oral LA supplementation, a single bout of strenuous exercise and endurance exercise training on the lipoyllysine content in skeletal muscle and liver tissues of rat were examined. Incorporation of lipoyl moiety to tissue protein was not increased by enhanced abundance of LA in the diet. Endurance exercise training markedly increased lipoyllysine content in the liver at rest. A bout of exhaustive exercise also increased hepatic lipoyllysine content. A significant interaction of exhaustive exercise and training to increase tissue lipoyllysine content was evident. In vastus lateralis skeletal muscle, training did not influence tissue lipoyllysine content. A single bout of exhaustive exercise, however, clearly increased the level of lipoyllysine in the muscle. Comparison of tissue lipoyllysine data with that of free or loosely-bound LA results showed a clear lack of association between the two apparently related parameters. Tightly protein-bound lipoyllysine pool in tissues appeared to be independent of the loosely-bound or free LA status in the tissue.

Multiple lymphomatous polyposis presenting as inflammatory bowel disease

Multiple lymphomatous polyposis is a rare manifestation of primary gastrointestinal lymphoma characterized by polypoidal masses involving several segments of the gastrointestinal tract. We report a case who initially presented with features resembling inflammatory bowel disease.

Uterine surveillance of asymptomatic postmenopausal women taking tamoxifen

The aim of this study was to assess the ability of transvaginal sonography (TVS) and office hysteroscopy with sharp curettage to characterize the morphological changes in the uteri of asymptomatic postmenopausal women taking long-term tamoxifen for breast cancer. The overall acceptability of a single-visit screening clinic for these women was also evaluated. Fifty-eight women were recruited from patients undergoing regular follow-up at the Leicester Royal Infirmary for breast cancer. A single-visit clinic was acceptable to 94.8% of these women. Transvaginal sonography detected endometrial thickness of greater than 5 mm in 84.5% of cases, but there was no relationship between total tamoxifen exposure and endometrial thickness. Transvaginal sonography also detected uterine lesions such as fibroids and endometrial cysts in 34.5% of cases. Hysteroscopy detected the latter uterine lesions in 53.4% of cases, with three cases (5.2%) of endometrial polyps also being identified in these women. Sharp curettage sampling of the endometrium produced specimens sufficient for diagnosis in 84.5% of cases; 70.7% of specimens were reported as showing types of 'quiescent' endometrium with 13.8% of specimens showing 'active' endometrium. In the latter group, there was a case of complex hyperplasia detected and also a case with granulomatous endometritis. For each histopathological diagnosis identified, there was a wide range of endometrial thickness recorded by TVS. A single-visit screening clinic involving TVS and hysteroscopy with sharp curettage was acceptable to asymptomatic women taking tamoxifen. However, hysteroscopy was more effective than TVS in detecting endometrial lesions such as polyps, fibroids and cystic areas. Although TVS detected endometrial thickness greater than 5 mm in the majority of cases, there were no malignancies detected and, for each histopathological classification, there was a wide range of endometrial thickness associated. Thus, the isolated use of TVS is insufficient for screening the endometria of these women.

Risperidone in Indian patients with schizophrenia

Conventional antipsychotic agents are not effective against negative symptoms of schizophrenia and are also noted for their extrapyramidal side effects. Risperidone is a noval antipsychotic agent whose dual antagonism of dopamine and serotonin receptors is believed to underlie its efficacy against negative symptoms and the low incidence of extrapyramidal side effects. An open, non-comparative study of seven weeks duration was performed to evaluate risperidone in the treatment of schizophrenia in Indian patients. Previous antipsychotic therapy was discontinued for a week before risperidone therapy was initiated. At the end of six weeks of risperidone therapy, clinical improvement (≥ 20% reduction in total score on positive and negative syndrome scale for schizophrenia (PANSS;; was shown by 128 (87.7%) of the 146 evaluable patients. Statistically significant reduction (p < 0.05) occurred in the total score of this scale and in the subscale scores for positive, negative and general psychopathology symptoms and in the clinical global impression severity score. The number of patients with adverse experiences were 108 (65.5%) at baseline and 120 (72.7%) at the end of risperidone therapy. Extrapyramidal symptoms, seen in 65 (39.4%) patients compared to 22 (13.3%) patients at baseline, were largely mild to moderate in intensity.