40019002
Prospective randomized comparative study of macular thickness following phacoemulsification and manual small incision cataract surgery.
PURPOSE
To compare macular thickness following uncomplicated phacoemulsification with foldable acrylic lens and manual small incision cataract surgery (MSICS) with non-foldable polymethyl methacrylate (PMMA) lens implantation.


METHODS
Prospective study was carried out with one eye each of 224 patients with senile cataract randomized into two groups, phacoemulsification and MSICS, by simple 1:1 randomization. Following surgery by either of the two methods, macular thickness was measured by optical coherence tomography (OCT) on the 1st, 7th, 42nd and 180th postoperative day. Main outcome measure was postoperative macular thickness.


RESULTS
On the first postoperative day, central subfield mean thickness (CSMT) in MSICS group was 192.8 +/- 17.9 microm and that in phacoemulsification group was 192.1 +/- 27.4 microm, with no significant difference (p = 0.12). On the 7th day, CSMT in MSICS group (198.9 +/- 21.4 microm) was significantly (p = 0.04) more than that in phacoemulsification group (193.1 +/- 19.3 microm). On the 42nd day, CSMT in MSICS group was 207.8 +/- 26.3 microm and that in phacoemulsification group was 198.3 +/- 23 microm, the difference being significant (p = 0.007). Clinically macular oedema was not diagnosed in any of the patients at any visit. The increase in macular thickness was sub-clinical and did not affect final visual outcome in any patient.


CONCLUSION
In spite of the greater theoretical risk of increased postoperative inflammation following MSICS, there was no evidence of cystoid macular oedema, either clinically or on OCT. However, chance of sub-clinical increase in CSMT was more following MSICS compared to phacoemulsification.
45666131
Epithelial ingrowth following surgery of recurrent pterygium
Epithelial ingrowth is a rare but devastating condition of the eye, known to complicate incisional ocular procedures. We report a case of secondary glaucoma due to epithelial ingrowth following limbal conjunctival autograft in a case of recurrent pterygium. To prevent such devastating conditions from occurring dissection of recurrent pterygium demands special care to avoid anterior chamber penetration.
21267058
Visual impairment in urban school children of low-income families in Kolkata, India.
To evaluate pattern of visual impairment in school children from low-income families in Kolkata, India, an institutional cross-sectional study was conducted among 2570 children of 10 primary schools. Ocular examination including refraction was done and pattern of visual impairment and refractive error was studied. The age range was 6-14 years. Refractive error was seen in 14.7%. Only 4 children were already wearing correction. Myopia and hypermetropia was present in 307 (11.9%) and 65 (2.5%) children, respectively. Visual acuity of less than 6/12 in better eye was present in 109 (4.2%) and 5 (0.2%) children pre- and post-correction, respectively. Eighteen children had amblyopia. Although prevalence of refractive error in this group is less compared to school children of all income categories reported from other cities of India, it is more compared to school children of all income categories from the same city. Refractive error mostly remains uncorrected in this group.
1771625
Correlation of macular thickness and posterior hyaloid change following bevacizumab and triamcinolone in diffuse diabetic macular edema in middle-aged patients
To compare changes in posterior vitreous detachment (PVD) following intravitreal injection of bevacizumab and triamcinolone in diffuse diabetic macular edema in middle-aged type 2 diabetes patients and to correlate this change with change in central macular thickness (CMT). Design: cross sectional study. Fifteen consecutive patients treated by intravitreal bevacizumab (group A) and ten patients treated by intravitreal triamcinolone (group B). Institutional study carried out by retrospective analysis of patient registers including serial optical coherence tomography (OCT) images at baseline, and after 1 and 4 months. A central macular thickness (CMT) and vitreomacular relationship was noted on OCT. PVD was graded on a linear scale (0–4). Change in grade of PVD was correlated with change in CMT at each follow-up. At month 4, the decrease in mean CMT from baseline was 51.2 μ (P = 0.000) and 45 μ (P = 0.022) in group A and group B, respectively, with no significant difference between the two groups (P = 0.874). A change in grades of PVD from baseline to month 4 was significant in both group A (P = 0.001) and group B (P = 0.004) with no significant difference between the two groups (P = 0.906). A significant correlation between change in PVD and reduction of CMT was observed in group A (P = 0.011) but not in group B (P = 0.315). Both bevacizumab and triamcinolone caused a significant reduction in macular thickness and a significant change in grade of PVD. Change in PVD played an influential role in the reduction of macular thickness following bevacizumab.
38995657
Posthepatitis aplastic anaemia presenting only with bilateral vision loss.
Aplastic anaemia is pancytopenia with marrow hypocellularity. Hepatitis-associated aplastic anaemia is a varient or aplastic anaemia that follows an acute attack of seronegative hepatitis. Here a case of hepatitis-associated aplastic anaemia presenting with sudden onset of severe simultaneous bilateral vision loss and without any other usual presenting signs is reported. Partial recovery of blood cell count occurred following immunosuppressive therapy. Posterior hyalodotmy helped rapid resolution of premacular subhyaloid haemorrhage. Although bilateral vision loss may rarely be the initial presentation of aplastic anaemia, no such report is known in hepatitis-associated aplastic anaemia. Posthepatitis vision loss needs careful investigation to exclude an underlying haematological disorder.
43819004
Idiopathic intracranial hypertension in a child after hemodialysis.
Idiopathic intracranial hypertension remains a disease of unknown etiology. Epidemiology, associations, features, and prognosis in children have changed over the years. The main clinical complaint of pediatric idiopathic intracranial hypertension is headache with visual disturbance. We report on a patient with childhood idiopathic intracranial hypertension, who presented without headache after hemodialysis for acute renal failure. Idiopathic intracranial hypertension without headache is believed to have a poor prognosis. However, this child demonstrated a favorable outcome with medical therapy. The child was followed with serial optical coherence tomography of retinal nerve fiber layer thickness around the optic nerve head. In the absence of a reliable procedure to evaluate the therapeutic efficacy in the follow-up of patients with idiopathic intracranial hypertension, the importance of optical coherence tomography, a noninvasive, objective, and reproducible procedure, is highlighted as a useful adjunct in the management of idiopathic intracranial hypertension.
19314963
Comparative immunopotentiating properties of saponin and incomplete Freund's adjuvant coupled to affinity purified larval antigen of Hyalomma anatolicum anatolicum.
Comparative immunostimulatory properties of saponin and incomplete Freund's adjuvant (IFA) were studied using affinity purified 39 kDa larval antigen of Hyalomma anatolicum anatolicum. Significant antibody response to 39 kDa antigen was detected in the sera of rabbits immunized with both 39 kDa plus saponin and 39 kDa plus IFA in comparison to their corresponding control animals. Insignificant differences were noted in the antibody response between the animals of two immunized groups. Upon challenge, the animals immunized with 39 kDa plus IFA rejected 76.2 +/- 9.7% of larvae and 45.8 +/- 4.1% of adults while in group of animals injected with 39 kDa plus saponin rejected 80.9 +/- 11.2% of larvae and 47.2 +/- 5.7% of adults.
7329308
Beating-heart mitral valve surgery in patients with poor left ventricular function.
BACKGROUND AND AIM OF THE STUDY
Mitral valve surgery in the presence of poor left ventricular (LV) function is associated with higher mortality. One surgeon's (S. K. N.) evolving practice of mitral valve surgery on the beating heart using normothermic cardiopulmonary bypass (CPB) in a cohort of patients is described.


METHODS
Between July 2000 and December 2002, 23 patients (13 men, 10 women; mean age 68.6 +/- 4.8 years; range: 54-81 years) with mitral regurgitation and LV ejection fraction <30% undergoing isolated mitral valve repair (n = 4) or replacement (n = 19) were investigated. All patients received maximal drug therapy. Among patients, 17 were in NYHA class III, and six in class IV.


RESULTS
The mean duration of follow up was 17 +/- 14 months, and was complete for all survivors. The visual field of the on-pump beating heart was equal to that of conventional valvular surgery, and technical accuracy was not compromised. The mean ICU and hospital stays were 2.4 +/- 1.3 days and 8.9 +/- 2.6 days, respectively. Mean CPB time was 74.3 +/- 14.8 min. Thirty-day mortality was significantly lower (8.7%) when compared to mean Euroscore-predicted mortality for this high-risk group (16.9%; p <0.001). The medium-term one- and two-year survivals were 87% and 78%, respectively. Mean NYHA class was improved, from 3.6 +/- 0.5 preoperatively to 1.9 +/- 0.7 at follow up (p = 0.037).


CONCLUSION
On-pump, beating-heart mitral valve surgery is a good option in patients with poor LV function, and is advantageous as conditions for the heart are more physiological with a beating tonus than with cardioplegia.
19067572
Long term results of surgery versus continuous hyperfractionated accelerated radiotherapy (CHART) in patients aged >70 years with stage 1 non-small cell lung cancer.
BACKGROUND
Patients with T1N0 non-small cell lung cancer (NSCLC) are preferably treated by anatomic lobectomy. However, not all such patients are suitable for lobectomy due to their age or co-morbidity. Our aim was to determine the results obtained following lobectomy, wedge resection (WR) or continuous hyperfractionated accelerated radiotherapy (CHART) in patients aged >70 years.


PATIENTS
Two hundred and fifteen consecutive patients aged >70 years, with pathologic stage 1 NSCLC in our unit between 1991 and 2001 were studied. Of these patients, 149 had a lobectomy, 47 had a WR and 19 had CHART. Follow-up was 100% complete.


RESULTS
Analysis demonstrated the WR and CHART patients to have reduced pulmonary function (FEV(1) 59% and 52%, respectively, of predicted vs. 76%, P<0.001) when compared to the lobectomy group but there were no differences among the groups with regard to mean age and histologic tumour type. There were no operative mortality among patients after WR; however, a 2.7% 30-day operative mortality among patients undergoing lobectomy (P=0.29). Kaplan-Meier survival curves at 1 and 5 years for patients undergoing WR, lobectomy and CHART was 98% and 74% vs. 97% and 68% vs. 80% and 39%, respectively (P=0.0484). The frequency of local/regional recurrence in the WR group (19.1%) was not significantly higher than in the lobectomy group (18.4%, P=0.38) when compared to the CHART group (27%, P=0.07).


CONCLUSION
Loco-regional recurrence and survival after WR and lobectomy in elderly patients with stage I NSCLC are comparable. Although the numbers are small, these data suggest that CHART is a reasonable treatment option for those who are not suitable candidates for surgery.
30156310
Domain specific association of small fluorescent probe trans-3-(4-monomethylaminophenyl)-acrylonitrile (MMAPA) with bovine serum albumin (BSA) and its dissociation from protein binding sites by Ag nanoparticles: spectroscopic and molecular docking study.
Photoinduced intramolecular charge transfer produced a polar excited state in trans-3-(4-monomethylaminophenyl)acrylonitrile (MMAPA), rendering the resulting emission sensitive to the medium polarity. Strong binding interaction of silver nanoparticles with the probe was observed, causing fluorescence quenching through the static quenching process. The probe MMAPA was found to bind to the less polar hydrophobic, restricted proteinous environment of bovine serum albumin (BSA) resulting in the blue shift of the emission maximum with an increase in emission intensity and fluorescence anisotropy. Studies using site markers of flufenamic acid and phenylbutazone coupled with molecular docking results predicted that the binding site of the probe is in between subdomains IIIA and IB of BSA and is different from the conventional Sudlow sites. The denaturation of the probe-bound BSA by urea or heat released the probe from this proteinous environment to water marked by exactly reverse spectral changes. On the interaction of silver nanoparticles with the probe bound protein, the probe was observed to move from its binding site in the protein to the Ag(0) nanoparticle surface involving conformational changes of the protein near the probe binding site.
22775693
Instructive role of aPKCζ subcellular localization in the assembly of adherens junctions in neural progenitors
In the neurogenic phase of CNS development, the proliferating progenitors are found medially within the neuroepithelium. The adherens junctions on the apical membrane of proliferating neural progenitors allow for cell–cell adhesion and medial stratification. In contrast, differentiating neuronal precursors delaminate and migrate laterally, establishing the laminar layers. Apical adherens junctions also establish the apical–basal polarity in neural progenitors, which in turn is postulated to lead to asymmetric inheritance of cell fate determinants during neurogenic divisions. The signaling pathways and cellular mechanisms that regulate the assembly and asymmetric localization of adherens junctions in neural progenitors remain elusive. Here we show that atypical PKCζ/λ (aPKCζ/λ) localizes at the apical membrane of proliferating neural stem cells, but not postmitotic neuronal precursors, in the developing chicken neural tube. This precise subcellular compartmentalization of the kinase activity provides an instructive signal for apical assembly of adherens junctions in a PI3K, Rac/Cdc42 signaling-dependent pathway. Apical aPKCζ coordinates neural stem cell proliferation and the overall stratification of cell types within the neural tube.