Disposable paper electrodes for detection of changes in dopamine concentrations in rat brain homogenates.

Dopamine, the main catecholamine neurotransmitter plays an important role in renal, cardiovascular, central nervous systems, and pathophysiological processes. The abnormal dopamine levels can result in neurological disorders such as Parkinson's, Alzheimer's, schizophrenia, acute anxiety, neuroblastoma and also contribute to cognitive dysfunctions. Given the widespread importance of dopamine concentration levels, it is imperative to develop sensors that are able to monitor dopamine. Herein, we have developed pre-anodized disposable paper electrode modified with 1-pyrenebutyric acid, for the selective and sensitive determination of dopamine. The sensor was characterized with Fourier transform infrared spectroscopy, Energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and electrochemical techniques for addressing the robust formation and electrochemical activity. The modified electrode exhibited excellent electrocatalytic activity towards dopamine without the common interference from ascorbic acid. The calibration plot for the dopamine sensor resulted linear range from 0.003 µM to 0.5 µM with a detection limit of 0.11 nM. The sensor's potential utility was tested by monitoring dopamine concentration changes in rat brain homogenates when subjected to neurotoxicity. The developed sensor was validated with gold-standard UV-Vis spectroscopy studies and computational studies were performed to understand the interaction between 1-pyrenebutyric acid and dopamine.

Clinical study of profile of retinal detachment in vasculitis and its management at tertiary eye care hospital.

Purpose: The aim of the study was to understand the clinical profile and anatomical and visual outcome in Tractional/Combined (Tractional + Rhegmatogenous) Retinal Detachment due to vasculitis after surgical intervention. Methods: It was an interventional retrospective study of all cases who underwent surgery for RD with vasculitis at a single tertiary eye care center for over a period of 6 years. Patients with retinal detachment due to vasculitis were included in the study. All patients underwent the following surgical procedures: 240 belt buckle with three-port pars plana vitrectomy with membrane dissection and peeling with fluid gas exchange/with endolaser with silicon oil/C3 F8 gas injection. Results: In our study, 83.33% had preoperative vision of less than 6/60, whereas postoperatively 66.66% had vision of less than 6/60. Postoperatively 33.33% patients had vision better than 6/36. Of the six eyes operated for vasculitis with RD, retina was attached in five eyes following surgery. One patient had recurrent retinal detachment due to extensive proliferative vitreoretinopathy changes, and he was advised re-procedure but was lost for follow-up. The anatomical success was 83.33% on the first surgery. Conclusion: The overall anatomic success rate of retina reattachment surgery in vasculitis patient was good, and the visual outcome following the surgery can improve in majority of the cases. Hence, timely intervention is advocated.

'Makkalai Thedi Maruthuvam' scheme in Tamil Nadu: an intersectionality-based analysis of access to NCD care.

There are gross inequities in access to non-communicable disease (NCD) care in India. The Indian state of Tamil Nadu recently launched the "Medicine at people's doorstep" (Makkalai Thedi Maruthuvam - MTM) scheme in which screening and medications for NCDs are delivered at people's doorsteps. This is likely to improve geographical access to NCD services in the community. The objective of this study is to analyse the MTM scheme and recommend policy interventions for improved and equitable access to NCD services in the community. We analysed the MTM policy document using the intersectionality-based policy analysis framework. This analysis was supplemented further with literature review to enhance understanding of the various intersecting axes of inequities, such as gender discrimination, caste oppression, poverty, disabilities and geographical access barriers. The MTM policy document, while it removes the physical access barrier, does not frame the problem of NCDs from an intersectionality perspective. This can increase the chances of inequities in access to NCD services persisting despite this scheme. We also recommend interventions for the short, intermediate and long term to make NCD care more accessible. Creation of a gender, caste, class, geographical access, and disabilities disaggregated database of patients with NCDs, using this database for monitoring the delivery of MTM services, dynamic mapping of vulnerability of the target populations for delivery of MTM services and long term ongoing digital surveillance of factors inducing inequities to access of NCD services can all help reduce inequities in access to NCD care.

Assessment of sympathovagal balance by HRV analysis in alcoholic and nonalcoholic fatty liver disease patients.

BACKGROUND: Heart rate variability (HRV) is the variation in the time intervals between continuous heartbeats also called interbeat intervals to give information related to the heart, blood pressure, gaseous exchange, and sympathetic and parasympathetic balance. Abnormalities in the conduction of the cardiac system alter the measurements of heart rate variability and lead to alteration in autonomic function with a higher risk of mortality. So, our objective includes the assessment of sympathovagal balance in AFLD and NAFLD patients. MATERIALS AND METHODS: The study included 78 alcoholic and 54 nonalcoholic fatty liver patients. A room temperature of 23°C with 25-35% humidity will be maintained in a recording room. Basal supine heart rate and BP will be recorded by the oscillometric method using an automated blood pressure monitor Omron MX3, India. Lead II ECG will be recorded for the next 5 minutes in total resting condition for short-term HRV analysis. Short-term HRV indices including time domain and frequency domain were recorded from each patient. Under time domain, SDNN, RMSSD, and average RR were noted. Under frequency domain, LF, HF, VLF, LF (nu), HF (nu), and LF/HF were calculated. The data were collected by using a 16-bit, power lab 8/30 data acquisition system (New South Wales, Australia) with acknowledge 3.8.2 software. Inferential analyses such as independent t-tests and Mann-Whitney tests were used to compare NAFLD and AFLD patient groups. Carl Pearson correlation analysis was performed to obtain a relationship between variables. RESULTS: SDNN in (ms) which represents the overall HRV found to be decreased in both alcoholic (32.84 ± 79.08) and nonalcoholic fatty liver disease (22.04 ± 13.85) compared to the normal range (50 ± 16)) from 27 studies. The value of RMSSD in (ms) was decreased in both alcoholic (17.00 ± 12.48) and nonalcoholic fatty liver disease patients (14.00 ± 9.44) with the normal range of (42 ± 15) from 15 studies. Pearson correlation analysis showed the age of AFLD patients significantly and positively correlated with average RR. Pearson correlation analysis for the age of NAFLD patients was significantly and positively correlated with the average RR, HF, SDNN, RMSSD, and LF. CONCLUSION: Altered autonomic activity was noted in both alcoholic and nonalcoholic fatty liver disease patients. An early prognosis of fatty liver is very necessary to prevent the disease progress into later fatal life-threatening stages.

Manual small-incision cataract surgery under topical anesthesia.

Manual small-incision cataract surgery is one of the most common surgical procedures in ophthalmology. Most cataract surgeries are performed under local anaesthesia. Peribulbar or retrobulbar anaesthesia is commonly used to achieve analgesia and akinesia during surgery but it has various complications. Our aim was to study patient comfort and surgeon's perspective in terms of patient cooperation in MSICS under topical anaesthesia using only proparacaine 0.5% eye drops without any periocular block or intracameral drug. Also to popularise Topical MSICS similar to Topical Phacoemulsification. A prospective analytical study of 33 patients who underwent MSICS surgery from March 2022 to June 2022 using Topical proparacaine eye drops 0.5% was done and patient's comfort and surgeon's perspective in terms of patient cooperation was studied on a scale of 1-5. Out of 33 patients who underwent surgery, the average comfort score based on patient feedback was 3.45± 0.96 and average patient cooperation score based on surgeon assessment was 3.42 ± 1.07 on a scale of 1-5. We concluded that MSICS using only topical proparacaine 0.5% eye drops, can provide sufficient patient comfort and can avoid complications related to peribulbar anaesthesia. Hence it can be used in large scale cataract surgeries and also provides economical utilisation of resources, lesser complications and early post operative recovery without compromising surgical outcome.

Retinopathy of prematurity screening and retinal hemorrhages - Our experience among Indian babies.

Purpose: To evaluate the clinical characteristics of intraocular hemorrhages among babies screened for retinopathy of prematurity (ROP) and thereby their additional risk to the progression of ROP. Methods: A descriptive study was conducted at a tertiary referral hospital, which included 108 eyes of 60 neonates who were discovered to have retinal hemorrhages on retinal screening of 540 babies at risk for ROP. Maternal, obstetric, and neonatal risk factors were assessed in neonates with retinal hemorrhages. Retinal hemorrhages were assessed in terms of type, area, and relation to different retinal zones. Results: Among 540 neonates who were screened, retinal hemorrhages were found in 11.2% (n = 60 babies). Elderly primigravida mothers and spontaneous vaginal deliveries with prolonged second stage of labor were a common maternal risk factors for retinal hemorrhages. Low birth weight and preterm were fetal risk factors with neonatal retinal hemorrhages. These hemorrhages were more often bilateral (no. of babies = 48, 80%). Flame-shaped hemorrhages were more common than dot and blot ones. The majority of cases (no. of eyes = 74, 65%) resolved within 4 weeks, whereas four babies (8 eyes, 7.4%) progressed to ROP were treated with laser. Conclusion: Retinal hemorrhages in neonates are commonly associated with prolonged duration of second stage of labor, advanced maternal age, and anemia. Although not all progress to ROP, recognizing preterm and low birth weight babies with junctional hemorrhages is crucial not to delay the treatment. Regular follow-up until the clearance of hemorrhages and monitoring systemic conditions in these babies of amblyogenic age-group are required.

The Diagnostic Value of Hysterosalpingography and Hysterolaparoscopy for Evaluating Uterine Cavity and Tubal Patency in Infertile Patients.

Background and objective Hysterosalpingography (HSG) is a common radiologic modality employed for the initial workup of female infertile patients to evaluate for tubal patency or any gross intrauterine pathology. HSG is a relatively cheap and easily available outpatient procedure but bears the risk of radiation exposure. The purpose of the study was to compare the diagnostic value of HSG with that of diagnostic hysterolaparoscopy in infertile women and to evaluate their role in the diagnosis and management of infertility. Methodology This study was carried out from February 2018 to January 2019. All women attending our outpatient department (OPD) for the treatment of infertility who were aged between 20-40 years were included in the study. Those with acute vaginal and cervical infection and those having an allergic reaction to the dye used in HSG were excluded from the study. Known cases of pelvic inflammatory disease and those who achieved pregnancy before the performance of hysteroscopy were also excluded from the study. Results A total of 172 women with primary or secondary infertility were enrolled in the study. Out of these, 13 women became pregnant, and two were lost to follow-up and were excluded from our study. Thus, a total of 157 infertile women were analysed. The agreement between HSG and hysteroscopy was 71.3% for the evaluation of the uterine cavity, and this was considered a fair strength of agreement between the procedures (k value=0.302). Conclusion Compared to HSG, the incidental findings detected by hysteroscopy amounted to 19.14%. Our study results depict the advantage of hysterolaparoscopy over HSG. Although the sensitivity of HSG is as good as that of diagnostic hysterolaparoscopy for the detection of tubal patency, a significant number of important incidental findings can be missed by it. Hence, diagnostic hysterolaparoscopy should be offered as the first-line modality for the evaluation of infertility wherever the procedure is available.

Scleral Buckling and Corneal Topography in a Rare Case of Keratoconus with Rhegmatogenous Retinal Detachment in an Indian Patient.

BACKGROUND: Management of Rhegmatogenous Retinal Detachment (RRD) in keratoconus could be challenging in various aspects. Visualisation of fundus due to altered reflex along with axial myopia could pose difficulty while performing pars plana vitrectomy. Our patient underwent Scleral Buckling with good anatomical results. We came across an isolated case of Keratoconus with Retinal detachment without any pre existing comorbidities unlike earlier reports where patients with history of atopic dermatitis had Keratoconus associated with RRD. The main purpose was to know the outcome of scleral buckling and its effect on corneal topography in a case of keratoconus with RRD. CASE: A 35 year old female presented with diminution of vision in both eyes since childhood, but more so in the right eye (RE) since last 6 months. She was aphakic with VA of 1/60 and 2/60 in the right and left eye respectively. She was diagnosed as both eyes keratoconus with RE near total rhegmatogenous retinal detachment (RRD) with sub retinal gliosis. She gave no history of vigorous eye rubbing or atopic dermatitis. For RE she underwent uneventful scleral buckling surgery. OBSERVATION: In post operative follow up, the retina was attached. Placido based corneal topography was done pre operatively with keratometry reading of RE - K1 62.79@96º, K2 - 55.92@6˚ and repeated at the end of three months follow up with readings of RE - K1-61.45@98˚, K2- 54.50@ 8˚. There were minimal changes in the keratometry values post operatively with flattening of vertical meridian and horizontal meridian. CONCLUSION: In keratoconus, RD can occur without any predisposed or preceding condition. Although majority of cases are associated with atopic dermatitis and eye rubbing. Scleral buckling (SB) was successful with good functional and anatomical outcome., however it has minimal effect on corneal topography.

Assessment of prognostic aspects of cancer by Taila Bindu Pariksha.

INTRODUCTION: For the diagnosis of various aspects of disease and diseased person, several methods have been described in the Ayurvedic texts. These can be broadly classified into Roga and Rogi Pariksha. Several methods of Roga-Rogi Pariksha such as Ashtasthana, Dashavidha, Dvadashavidha Pariksha are described. Mutra Pariksha was the main laboratory investigative tools in the past and it is included under Ashtasthana, Pariksha. There is no direct description of methodology to ascertain the prognosis of cancer in the Ayurvedic classics. Taila Bindu Pariksha, which is a part of Mutra Pariksha helps in assessing the prognosis of a disease. Eastern Cooperative Oncology Group (ECOG) had developed the scale to ascertain prognosis of cancer in 1955. These ECOG performance scale gives doctors and research scholars a scale with which they can quickly assess the functional capacity of a patient and the progress of disease. AIM: To evaluate the prognosis of cancer by Taila Bindu Pariksha and compare the results with ECOG scale. MATERIALS AND METHODS: A pilot study was undertaken on a single group of 20 cancer patients which are advised radio or chemotherapy for further management. The urine samples collected from the patients were subjected to Taila Bindu Pariksha. The ECOG scale was also assessed and compared with shape and direction of spread. RESULT: In majority of the patients, the correlation was found statistically highly significant. CONCLUSION: Taila Bindu Pariksha may be used as an alternative method to ascertain the prognosis of the cancer patients.

Neurocysticercosis - A Window to Intraocular Involvement.

OBJECTIVE: To analyse the clinical characteristics of intraocular cysticercosis and the association of neurocysticercosis with intraocular involvement in these patients Materials and methods: Retrospective case series of records of patients managed at a Tertiary Care Hospital in South India. Case records of patients managed at a Tertiary Care Hospital in South India over two years (October 2012 - October 2014) were reviewed and cases reported with intraocular cysticercosis were included in the study and results analyzed. RESULTS: Five (5) patients of intraocular cysticercosis were diagnosed in a two year period at our centre, 60% being bilateral. Eight (8) eyes of five (5) patients had intraocular cysts documented by clinical examination and B mode ultrasonography (75% eyes with active cysts, 25% eyes inactive) .Visual acuity at presentation of eyes with active cysts ranged from perception of light to counting finger 4m. The 75% eyes had tractional retinal detachment at presentation. Neurocysticercosis was documented in 80% of the cases oncomputed tomography / magnetic resonance imaging . Six (6) eyes with active cysts underwent parsplanavitrectomy with cyst removal using vitreous cutter with concurrent management of tractional retinal detachment in five (5) eyes. Postoperative visual recovery was poor in eyes with associated tractional retinal detachment while good anatomical outcome was achieved in all six (6) cases. CONCLUSION: Intraocular cysticercosis can be associated with cysts in other areas. High number of patients with neurocysticercosis (80%) in those with intraocular cysticercosis in our study may indicate positive association between the two which needs further investigation.

Domain specific changes in cognition at high altitude and its correlation with hyperhomocysteinemia.

Though acute exposure to hypobaric hypoxia is reported to impair cognitive performance, the effects of prolonged exposure on different cognitive domains have been less studied. The present study aimed at investigating the time dependent changes in cognitive performance on prolonged stay at high altitude and its correlation with electroencephalogram (EEG) and plasma homocysteine. The study was conducted on 761 male volunteers of 25-35 years age who had never been to high altitude and baseline data pertaining to domain specific cognitive performance, EEG and homocysteine was acquired at altitude ≤240 m mean sea level (MSL). The volunteers were inducted to an altitude of 4200-4600 m MSL and longitudinal follow-ups were conducted at durations of 03, 12 and 18 months. Neuropsychological assessment was performed for mild cognitive impairment (MCI), attention, information processing rate, visuo-spatial cognition and executive functioning. Total homocysteine (tHcy), vitamin B12 and folic acid were estimated. Mini Mental State Examination (MMSE) showed temporal increase in the percentage prevalence of MCI from 8.17% on 03 months of stay at high altitude to 18.54% on 18 months of stay. Impairment in visuo-spatial executive, attention, delayed recall and procedural memory related cognitive domains were detected following prolonged stay in high altitude. Increase in alpha wave amplitude in the T3, T4 and C3 regions was observed during the follow-ups which was inversely correlated (r = -0.68) to MMSE scores. The tHcy increased proportionately with duration of stay at high altitude and was correlated with MCI. No change in vitamin B12 and folic acid was observed. Our findings suggest that cognitive impairment is progressively associated with duration of stay at high altitude and is correlated with elevated tHcy in the plasma. Moreover, progressive MCI at high altitude occurs despite acclimatization and is independent of vitamin B12 and folic acid.

Toxoplasmosis Presenting as Hyper Viscosity Syndrome due to Polyclonal Gammopathy.

We are presenting a rare case of toxoplasma lymphadenopathy with hyper viscosity syndrome due to polyclonal gammopathy. A 30 year old female presented with generalized lymphadenopathy. Lymph node biopsy findings suggestive of toxoplasmosis were confirmed on serology. Bone marrow aspiration showed 50 % plasma cells. On serum electrophoresis broad, diffuse band noted, indicative of polyclonal gammopathy. M band was absent. The patient was immunocompetent and presented with hyper viscosity syndrome masking the symptoms of underlying toxoplasmosis.

Autonomic cardiovascular responses in acclimatized lowlanders on prolonged stay at high altitude: a longitudinal follow up study.

Acute exposure to hypobaric hypoxia at high altitude is reported to cause sympathetic dominance that may contribute to the pathophysiology of high altitude illnesses. The effect of prolonged stay at high altitude on autonomic functions, however, remains to be explored. Thus, the present study aimed at investigating the effect of high altitude on autonomic neural control of cardiovascular responses by monitoring heart rate variability (HRV) during chronic hypobaric hypoxia. Baseline electrocardiography (ECG) data was acquired from the volunteers at mean sea level (MSL) (<250 m) in Rajasthan. Following induction of the study population to high altitude (4500-4800 m) in Ladakh region, ECG data was acquired from the volunteers after 6 months (ALL 6) and 18 months of induction (ALL 18). Out of 159 volunteers who underwent complete investigation during acquisition of baseline data, we have only included the data of 104 volunteers who constantly stayed at high altitude for 18 months to complete the final follow up after 18 months. HRV parameters, physiological indices and biochemical changes in serum were investigated. Our results show sympathetic hyperactivation along with compromise in parasympathetic activity in ALL 6 and ALL 18 when compared to baseline data. Reduction of sympathetic activity and increased parasympathetic response was however observed in ALL 18 when compared to ALL 6. Our findings suggest that autonomic response is regulated by two distinct mechanisms in the ALL 6 and ALL 18. While the autonomic alterations in the ALL 6 group could be attributed to increased sympathetic activity resulting from increased plasma catecholamine concentration, the sympathetic activity in ALL 18 group is associated with increased concentration of serum coronary risk factors and elevated homocysteine. These findings have important clinical implications in assessment of susceptibility to cardio-vascular risks in acclimatized lowlanders staying for prolonged duration at high altitude.

Renal markers in normal and hypertensive disorders of pregnancy in Indian women: a pilot study.

BACKGROUND: Altered renal function is an essential component of the pathophysiological process in pre-eclampsia. Kidneys play an important role in the turnover of low molecular weight substances such as creatinine, uric acid and cystatin C. The present study was undertaken if these serum markers were characteristically altered in Indian pregnant women. METHODS: Serum levels were therefore determined in samples from 69 healthy women at term as well as in 27 samples of patients with Pregnancy induced hypertension (PIH) and in 20 patients with pre-eclampsia (PE). RESULTS: The levels of all three components were significantly higher in pre-eclamptic patients when compared to healthy controls with the mean ± SD being 1.47 ± 0.9 vs. 1.06 ± 0.2 for cystatin C, 0.95 ± 0.2 vs. 0.67 ± 0.1 for creatinine and 6.13 ± 1.8 vs. 4.28 ±1.1 for uric acid respectively. In PIH cystatin C was significantly higher, 1.25 ± 0.9 unlike creatinine, 0.67 ± 0.14 and uric acid, 4.30 ± 1.0. Receiver operating characteristic (ROC) plots demonstrated that the diagnostic accuracy of serum creatinine was superior to serum uric acid and serum cystatin C and serum uric acid was better than serum cystatin C. CONCLUSION: The maternal serum cystatin C, creatinine and uric acid were all significantly elevated at the end of pregnancy in pre-eclampsia compared to those of healthy pregnant women. If this rise in the above markers during early pregnancy could predict the onset of PIH/PE, needs to be investigated.

Neuroglobin regulates hypoxic response of neuronal cells through Hif-1α- and Nrf2-mediated mechanism.

Oxygen sensing in hypoxic neurons has been classically attributed to cytochrome c oxidase and prolyl-4-hydroxylases and involves stabilization of transcription factors, hypoxia-inducible factor-1α (Hif-1α) and nuclear factor erythroid 2-related factor 2 (Nrf2) that mediate survival responses. On the contrary, release of cytochrome c into the cytosol during hypoxic stress triggers apoptosis in neuronal cells. We, here advocate that the redox state of neuroglobin (Ngb) could regulate both Hif-1α and Nrf2 stabilization and cytochrome c release during hypoxia. The hippocampal regions showing higher expression of Ngb were less susceptible to global hypoxia-mediated neurodegeneration. During normoxia, Ngb maintained cytochrome c in the reduced state and prevented its release from mitochondria by using cellular antioxidants. Greater turnover of oxidized cytochrome c and increased utilization of cellular antioxidants during acute hypoxia altered cellular redox status and stabilized Hif-1α and Nrf2 through Ngb-mediated mechanism. Chronic hypoxia, however, resulted in oxidation and degradation of Ngb, accumulation of ferric ions and release of cytochrome c that triggered apoptosis. Administration of N-acetyl-cysteine during hypoxic conditions improved neuronal survival by preventing Ngb oxidation and degradation. Taken together, these results establish a role for Ngb in regulating both the survival and apoptotic mechanisms associated with hypoxia.

Determinants of VIA (Visual Inspection of the Cervix After Acetic Acid Application) positivity in cervical cancer screening of women in a peri-urban area in Andhra Pradesh, India.

OBJECTIVES: Visual inspection of the cervix after acetic acid application (VIA) is widely recommended as the method of choice in cervical cancer screening programs in resource-limited settings because of its simplicity and ability to link with immediate treatment. In testing the effectiveness of VIA, human papillomavirus DNA testing, and Pap cytology in a population-based study in a peri-urban area in Andhra Pradesh, India, we found the sensitivity of VIA for detection of cervical intraepithelial neoplasia grade 2 and worse (CIN2+) to be 26.3%, much lower than the 60% to 90% reported in the literature. We therefore investigated the determinants of VIA positivity in our study population. METHODS: We evaluated VIA positivity by demographics and reproductive history, results of clinical examination, and results from the other screening methods. RESULTS: Of the 19 women diagnosed with CIN2+, only 5 were positive by VIA (positive predictive value, 3.1%). In multivariate analysis, VIA positivity (12.74%) was associated with older age, positive Pap smear, visually apparent cervical inflammation, and interobserver variation. Cervical inflammation of unknown cause was present in 21.62% of women. In disease-negative women, cervical inflammation was associated with an increase in VIA positivity from 6.1% to 15.5% (P<0.001). Among the six gynecologists who performed VIA, the positivity rate varied from 4% to 31%. CONCLUSIONS: The interpretation of VIA is subjective and its performance cannot be readily evaluated against objective standards. IMPACT: VIA is not a robust screening test and we caution against its use as the primary screening test in resource-limited regions.

N-acetyl cysteine supplementation prevents impairment of spatial working memory functions in rats following exposure to hypobaric hypoxia.

Exposure to high altitude (HA), especially extreme altitude, is associated with impairment of cognitive functions including memory and increased oxidative stress. However, the underlying mechanisms involved are not well understood. It is hypothesized that HA induced oxidative stress may be one of the factors underlying hypoxia induced memory impairment. The aim of the present study was to investigate the effect of hypobaric hypoxia (HH) on spatial working and reference memory functions, oxidative stress markers in rats and effect of supplementation of N-acetyl cysteine (NAC). The rats were divided into four groups. Group I served as normoxic (n=6), Group II served as hypoxic (n=6), Group III as hypoxia group treated with NAC (n=6) and Group IV served as normoxic group treated with NAC (n=6). Group II & III were exposed to HH for 3 days equivalent to 6100 m and received oral NAC supplementation (750 mg/kg) daily. Rats from all the groups were trained in Morris Water Maze (MWM) task for 8 consecutive days. Spatial working and reference memory were tested immediately after the termination of HH and then the rats were sacrificed for estimation of oxidative stress markers in hippocampus. Rats displayed significant deficits in spatial working memory, and increased oxidative stress along with decrease in antioxidant status on hypoxic exposure. Supplementation with NAC in hypoxia-exposed group improved spatial memory performance, and decreased oxidative stress. These findings indicate that hypoxic exposure is associated with increased oxidative stress, which may have caused memory deficit in rats exposed to simulated HA.

Study of placenta in sickle cell disorders.

Remarkable changes are seen on gross and microscopic examination of placenta of patients with sickle cell disorders, hence the present study was undertaken to find out the pathological changes seen in the placenta of sickle cell disorder patients, as compared to control and to study the effect of maternal sickling on the fetus. It includes total 73 cases, of which 10 were of control group and 63 were from patients with sickle cell disorders, which included 47 sickle cell trait (AS) and 16 sickle cell disease (SS) patients. In group II, 9 (14.28%) patients with SS pattern developed complications during pregnancy, in the form of vaso-occlusive and hemolytic crises. Pregnancy induced hypertension was seen in 4 (25%) out of 16 SS and 11 (23.40%) of the 47 AS patients. Urinary tract infection (UTI) was seen in 6 (37.5%) out of 16 SS and 8 (17.02%) out of 47 AS patients. Placentae in sickle cell disorders showed pathological changes in the form of infarction, calcification, sickled red blood cells and hemorrhage in intervillous spaces, increased syncytial knots, fibrinoid necrosis, stromal fibrosis, hyalinised villi and compensatory proliferation of trophoblastic cells.