The results indicate the cooperativity of each osmolyte with GdnH

The results indicate the cooperativity of each osmolyte with GdnHCl, and the different mechanisms of their effects from Arg on the B values. The work confirms that the osmolytes are not only protein stabilizers, but also protein aggregation suppressors for both native and denatured protein molecules. (C) 2008 Elsevier B.V. All rights reserved.”
“Background: Ceramic femoral heads produce less wear of the opposing polyethylene

than do metal femoral heads in wear simulation studies. This is a matched-pair analysis of the wear of ceramic and metal femoral CX-6258 datasheet heads on conventional polyethylene in uncemented total hip replacements in young, active patients at a minimum of fifteen years of follow-up.

Methods: From June 1989 to May 1992, thirty-one matched pairs of alumina ceramic or cobalt-chromium metal femoral heads were identified. Patients were matched on the basis of age, sex, body weight, diagnosis, and activity level. The mean age was 55 9 years (range, twenty-three to sixty-five years) selleck at the time of surgery. All procedures were performed with a posterolateral surgical approach by a single surgeon using press-fit Ranawat-Bernstein femoral stems, Harris-Galante-II acetabular cups, GUR 4150 conventional polyethylene (sterilized in argon), and 28-mm-diameter femoral heads. Wear measurements were performed by two independent

observers using the computer-assisted Roman software.

Results: The average duration

of follow-up was 17 +/- 1.7 years (range, fifteen to twenty years). The mean Hospital for Special Surgery hip scores (and standard deviation) in the ceramic and metal groups were 39 +/- 4 and 40 +/- 3 at the time of final follow-up. The University of California Los Angeles activity score at the time of GSK1210151A supplier the final follow-up was 6 +/- 2 for both groups. The mean wear rates for the ceramic group and the metal group were 0.086 +/- 0.05 mm/yr and 0.137 +/- 0.05 mm/yr, respectively (p = 0.0015). There was one reoperation in the ceramic group because of distal femoral osteolysis. There were three failures in the metal group, requiring isolated liner exchange in two hips and revision of the acetabular component in one hip because of wear-induced osteolysis and/or loosening that caused symptoms. Five hips in the ceramic group and six hips in the metal group had radiographic evidence of acetabular or femoral osteolysis, but none were symptomatic.

Conclusions: Ceramic femoral heads produced significantly less wear on conventional polyethylene liners at the time of long-term follow-up than did metal heads in this matched-pair analysis of young and active patients with uncemented fixation.”
“P>Plants use a variety of small peptides for cell to cell communication during growth and development. Leguminous plants are characterized by their ability to develop nitrogen-fixing nodules via an interaction with symbiotic bacteria.

However, no NT-proBNP threshold could predict which PDA would be

However, no NT-proBNP threshold could predict which PDA would be judged necessary to treat. It was concluded that early low NT-proBNP values can be used as a reliable independent marker to predict spontaneous ductal closure in preterm neonates. Yet, high NT-proBNP levels should not be used to guide the decision to treat PDA, the risk being of treating many bystanding PDAs.”
“Several studies suggest a strong familial aggregation for cluster headache (CH), but so far none of them have included subjects with probable cluster learn more headache (PCH) in accordance with the International Classification of Headache Disorders. Objective: To identify cases

of probable cluster headache and to assess the-familial aggregation of cluster headache by including these subjects. Method: Thirty-six patients attending a headache consultation and diagnosed with trigeminal autonomic headaches were subjected to a questionnaire-based interview. A telephone interview was also applied to all the relatives who were pointed out as possibly affected as well as to some NCT-501 mouse of the remaining relatives. Results: Twenty-four probands fulfilled the criteria for CH or PCH; they had 142 first-degree relatives, of whom five were found to have CH or PCH, including one case of CH sine headache. The risk

for first-degree relatives was observed to be increased by 35- to 46-fold. Conclusion: Our results suggest a familial aggregation of cluster headache in the Portuguese population.”
“OBJECTIVE: Accelerated bone loss that occurs in postmenopausal women has been linked to oxidative stress and increased free radicals. We propose the use of antioxidants to prevent and

reverse postmenopausal osteoporosis. This study aimed to examine the effects of tocotrienol, a vitamin E analog, on bone loss due to estrogen deficiency. Our previous study showed that tocotrienol increased the trabecular bone volume and trabecular number in ovariectomized rats. In the current study, we investigated the effects of tocotrienol supplementation on various biochemical parameters in a postmenopausal osteoporosis rat model.

MATERIALS AND METHODS: A total of 32 female Wistar rats were randomly divided into HM781-36B ic50 four groups. The baseline group was sacrificed at the start of the study, and another group was sham operated. The remaining rats were ovariectomized and either given olive oil as a vehicle or treated with tocotrienol at a dose of 60 mg/kg body weight. After four weeks of treatment, blood was withdrawn for the measurement of interleukin-1 (IL1) and interleukin-6 (IL6) (bone resorbing cytokines), serum osteocalcin (a bone formation marker) and pyridinoline (a bone resorption marker).

RESULTS: Tocotrienol supplementation in ovariectomized rats significantly reduced the levels of osteocalcin, IL1 and IL6. However, it did not alter the serum pyridinoline level.

Those patients without indication for defibrillator implantation

Those patients without indication for defibrillator implantation received ILRs. Follow-up continued until diagnosis or end of battery life.

Results: The EPS was diagnostic in 36 patients (42%). The most frequent diagnoses

were paroxysmal atrioventricular block (AVB) (n = 27), followed by ventricular tachycardia (VT) (n = 6). All patients with VT had structural heart disease; left BBB was more prevalent in this group. Thirty-eight patients received GDC-0994 ILRs and diagnosis was achieved in 13 (34%) of them; paroxysmal AVB (n = 10) was the most frequent diagnosis. Median follow-up to diagnosis of paroxysmal AVB was 97 days (interquartile range 60-117 days). Paroxysmal AVB was more GNS-1480 datasheet frequent

in patients with right BBB and prolonged PR interval and/or axis deviation. We found no occurrence of VT or arrhythmic death during follow-up.

Conclusions: The most common etiology of syncope in patients with BBB was paroxysmal AVB, followed by VT. The stepped use of EPS and ILR in negative patients enables us to safely achieve a high diagnostic yield, given that VT is usually diagnosed during EPS. Full English text available from: www.revespcardiol.org (C) 2010 Sociedad Espanola de Cardiologia. Published by Elsevier Espana, S.L. All rights reserved.”
“Background: Many older adults with hyperlipidemia or hypertension participate in the Older Americans Act Nutrition Program, which serves meals in community settings and delivers meals to homes. However, there is little information regarding whether therapeutic meals designed around Dietary Approach to Stop Hypertension Sapitinib cell line (DASH) principles have a beneficial effect on the diets of these older adults.

Objective: The objective of this study was to determine the degree to which dietary change is influenced by providing 7 home-delivered therapeutic meals weekly to adults aged >= 60 y.

Design: We conducted a 1-y randomized controlled trial in 298 persons with hyperlipidemia or hypertension, in which 50%

of participants received 7 therapeutic meals per week for 12 mo. Those in need of dietary change at baseline (n = 210) were examined. Changes in intermediate DASH accordance, DASH accordance, and the nutrients that make up the DASH diet were measured by using 24-h food recalls at baseline, 6 mo, and 12 mo. Chi-square tests, t tests, and multiple regression were used to examine the association between receipt of meals and dietary change over time.

Results: Participants who received meals were 20% (P = 0.001) more likely to reach intermediate DASH accordance at 6 mo and were 18% (P = 0.007) more likely to meet saturated fat accordance at 12 mo than were those who did not receive meals. When stratified by race and income, gains were marginally larger for whites and higher-income individuals.

Results: Plasma SP levels were significantly elevated in patients

Results: Plasma SP levels were significantly elevated in patients Stattic with both asthmatic and nonasthmatic cough compared with controls [31.1 pg/ml (range 18.0-52.2) and 30.0 pg/ml (range 15.1-50.3) vs. 15.4 pg/ml (range 11.3-23.7); p = 0.003 and p = 0.038, respectively] but did not differ between the two patient groups (p = 0.90). Plasma SP levels correlated with airway sensitivity (threshold dose of methacholine) in the patients with asthmatic cough (r = -0.37, p = 0.005) but not with airway reactivity, cough sensitivity, FEV(1) values, or sputum eosinophil and neutrophil counts in either group. Conclusions: Increased levels of SP in plasma are associated with

persistent cough in humans and might be related to Galardin airway sensitivity in asthmatic cough. Copyright (C) 2011 S. Karger AG, Basel”
“To examine disc degeneration at levels adjacent and next adjacent to the fractured vertebra and to analyses, if the disc degeneration is determined by the endplate fracture.

Thoracolumbar burst fracture is one of the most common spinal injuries. The diagnostic (clinical and imaging) approach and treatment of a fractured vertebra is well established; however, some controversy remains. The associated disc degeneration is less well known after

9-12 months of the short segment pedicle screw fixations. There is a major controversy whether spinal trauma with vertebral endplate fractures can result in posttraumatic disc degeneration. No study to date, however, has assessed disc degeneration of the AO type A3 thoracolumbar fractures without neurologic deficits after pedicle screw fixations.

Twenty-six patients with single-level

AO type A3 thoracolumbar fractures and no neurological deficit were treated by using postural reduction and short segment percutaneous pedicle screw fixation. No laminectomy and fusion were performed. Implants were removed 9-12 months after the first operation. The thoracolumbar magnetic resonance imaging (MRI) was used to assess disc degeneration at levels adjacent and next adjacent to the fractured vertebra before the first operation and after the second operation in a retrospective study.

After the instrumentation removal, new disc degeneration was usually found at level adjacent to the cranial endplate of fractured vertebra by MRI examination check details in 24 patients. The average Pfirrmann grade of degenerative discs adjacent to the cranial fractured endplates deteriorated from 2.1 pre-operatively to 3.4 after the second operation. No change of disc degeneration was seen at the caudal disc space adjacent to the fractured vertebra and the levels next adjacent to the fractured vertebra. The discs next adjacent to the fractured vertebra were showed to be relatively normal without changes of degeneration during the study period.

Disc degeneration usually occurs at level adjacent to the fractured endplate of thoracolumbar burst fractures. Endplate fracture is strongly associated with disc degeneration.

Increased thoracic aortic FDG-uptake at diagnosis of GCA may be a

Increased thoracic aortic FDG-uptake at diagnosis of GCA may be a bad prognostic factor for later aortic dilatation. In patients with isolated polymyalgia rheumatica – who have less intense vascular FDG uptake symptoms are caused by inflammation around the shoulders, hips, and spine.

Summary

Ultrasonography, MRI, and PET remain promising techniques in the scientific and clinical approach of large-vessel vasculitis.”
“Background:

A DNA methylation signature has been characterized that distinguishes rheumatoid arthritis (RA) fibroblast like synoviocytes (FLS) from osteoarthritis (OA) FLS. The presence Dorsomorphin of epigenetic changes in long-term cultured cells suggest that rheumatoid FLS imprinting might contribute to pathogenic behavior. To understand how differentially methylated genes (DMGs) might participate in the pathogenesis of RA, we evaluated the stability of Screening Library research buy the RA signature and whether DMGs are enriched in specific pathways and ontology categories.

Methods: To assess the RA methylation signatures the Illumina HumanMethylation450 chip was used to compare methylation levels in RA, OA, and normal (NL) FLS at passage 3, 5, and 7. Then methylation frequencies at CpGs within the signature were compared between passages. To assess the enrichment of DMGs in specific pathways,

DMGs were identified as genes that possess significantly differential methylated loci within their promoter regions. These sets of DMGs were then compared to pathway and ontology databases to establish enrichment in specific categories.

Results: Initial studies compared passage 3, 5, and 7 FLS from RA, OA, and NL. The patterns of differential methylation of each individual FLS line were very similar regardless of passage number. Using the most robust AG-881 molecular weight analysis, 20 out of 272 KEGG pathways and 43 out of 34,400 GO pathways were significantly altered for RA compared with OA and NL FLS. Most interestingly, we found that the KEGG ‘Rheumatoid Arthritis’ pathway was consistently the most significantly enriched with differentially methylated

loci. Additional pathways involved with innate immunity (Complement and Coagulation, Toll-like Receptors, NOD-like Receptors, and Cytosolic DNA-sensing), cell adhesion (Focal Adhesion, Cell Adhesion Molecule), and cytokines (Cytokine-cytokine Receptor). Taken together, KEGG and GO pathway analysis demonstrates non-random epigenetic imprinting of RA FLS.

Conclusions: The DNA methylation patterns include anomalies in key genes implicated in the pathogenesis of RA and are stable for multiple cell passages. Persistent epigenetic alterations could contribute to the aggressive phenotype of RA synoviocytes and identify potential therapeutic targets that could modulate the pathogenic behavior.

METHODS: The authors reviewed anesthesia-related maternal deaths

METHODS: The authors reviewed anesthesia-related maternal deaths that occurred from 1991 to 2002. Type of anesthesia involved, mode learn more of delivery, and cause of death were determined. Pregnancy-related mortality ratios, defined as pregnancy-related deaths due to anesthesia per million live births were calculated. Case fatality rates were estimated by applying a national estimate of the proportion of regional and general anesthetics to the national cesarean delivery rate.

RESULTS: Eighty-six pregnancy-related deaths were associated with complications of anesthesia, or 1.6% of total pregnancy-related deaths. Pregnancy-related mortality ratios

for deaths related to anesthesia is 1.2 per million live births for 1991-2002, a decrease of 59% from 1979-1990. Deaths mostly occurred among younger women, but the percentage of deaths among women aged 35-39 years increased substantially. Delivery method could not be determined 5-Fluoracil clinical trial in 14%, but the remaining 86% were undergoing cesarean delivery. Case-fatality rates for general anesthesia were 16.8 per million in 1991-1996 and 6.5 per million in 1997-2002, and for regional anesthesia were 2.5 and 3.8 per million, respectively. The resulting risk ratio between the two techniques for 1997-2002 was 1.7 (confidence interval 0.6-4.6, P=.2).

CONCLUSION: Anesthetic-related maternal mortality

decreased nearly 60% when data from 1979-1990 were compared with data from 1991-2002. Although case-fatality rates for general anesthesia are falling, rates for regional anesthesia are rising. (Obstet Gynecol 2011;117:69-74) DOI: 10.1097/AOG.0b013e31820093a9″
“Introduction: The aim of this work was a quantitative and qualitative assessment of a selected part of the microcirculation in children with diabetes type 1 using videocapillaroscopy technique.

Material/Methods: The authors tested Compound C ic50 a group consisting of 145 children (70 boys, 75 girls) diagnosed and treated for diabetes type 1 in the Diabetic Clinic of GCZD in Katowice for

at least one year. The study included history, clinical examination (including dermatological examination) and videocapillaroscopy. Capillaroscopy, a non-invasive, painless and easily repeatable test, was performed using videocapillaroscopy with digital storage of the obtained images. All nailfolds were examined in all children using videocapillaroscopy, and the obtained images were assessed quantitatively and qualitatively for changes in capillary loops in the tested children according to the defined diagnostic procedure.

Results: The analysis of capillaroscopic images described selected quantitative and qualitative characteristics. The conducted analysis showed an increase in the number of capillaries and their elongation, the presence of megacapillaries and Raynaud loops, which were accompanied by an intensive red background, indicating possible neoangiogenesis.


“Diabetes mellitus (DM) is a major risk factor for the dev


“Diabetes mellitus (DM) is a major risk factor for the development of atherosclerosis, and high-serum levels of insulin are strongly associated with type 2 DM. Atherosclerosis is characterized by lipid-laden macrophage foam cell formations, which contain substantial amount

of cholesterol and triglycerides (TG). This study analyzed for the first time, the effects of insulin on TG metabolism in macrophages under normal and diabetic conditions. Mouse peritoneal macrophages from C57BL6 mice were cultured under normal (5 mM) or high (diabetic condition, 25 mM) glucose concentration, with or without insulin, followed by the assessment of TGs metabolism

in these cells. Under diabetic condition, insulin increased TG accumulation in macrophages by 100%, decreased EVP4593 cellular TG degradation by 21%, and increased C-reactive protein levels in macrophages by 83%. Insulin decreased hormone-sensitive lipase mRNA and protein expression by 28 and 60%, respectively, and adipose TG lipase (ATGL) protein expression by 36%, with no significant reduction in ATGL mRNA levels. The inhibition of insulin-mediated phosphorylation, and the addition of cyclic adenosine 3’5′-monoposphate, abolished the insulin-mediated inhibition of TGs PXD101 in vitro degradation in cells. Insulin increases macrophage TGs accumulation only under diabetic conditions, suggesting that impaired glycemic control GDC-0941 price in diabetic patients treated with insulin may contribute to foam cell formations and enhanced inflammation in macrophages. (C) 2011 International Union of Biochemistry and Molecular Biology, Inc. Volume 37, Number 2, March/April 2011, Pages 95-103

. E-mail: [email protected]
“Background: Traditional reconstructive options for cranial defects include autogenous bone graft, bone substitutes, and synthetic materials. The established standard for repairing cranial defects is autogenous bone. However, young children do not have abundant donor sites for bone harvest, which leads to challenges in closing calvarial defects. Synthetic materials are not ideal alternatives because they require subsequent retrieval and are prone to infection. Their long-term effects on growth of the skull are also not well studied. Bone morphogenetic protein 2 (BMP-2), are shown to positively affect closure of cranial defects in animal models. We present a study comparing the efficacy and safety of closure of cranial defect with bone graft augmented with recombinant human BMP-2 (rhBMP-2) and compared with a series of patients treated with bone graft alone.

Methods: This study is a retrospective multicenter evaluation of 36 patients spanning 5 years.

We performed a genome-wide association study to search for

We performed a genome-wide association study to search for Savolitinib cell line genetic susceptibility loci for serum urate and gout and investigated the causal nature of the associations of serum urate with gout and selected cardiovascular

risk factors and coronary heart disease (CHD).

Methods and Results-Meta-analyses of genome-wide association studies (GWAS) were performed in 5 population-based cohorts of the Cohorts for Heart and Aging Research in Genome Epidemiology consortium for serum urate and gout in 28 283 white participants. The effect of the most significant single-nucleotide polymorphism at all genome-wide significant loci on serum urate was added to create a genetic urate score. Findings

were replicated in the Women’s Genome Health Study (n=22 054). Single-nucleotide polymorphisms at 8 genetic loci achieved genome-wide significance with serum urate levels (P=4×10(-8) to 2×10(-242) in SLC22A11, GCKR, R3HDM2-INHBC region, RREB1, PDZK1, SLC2A9, ABCG2, and SLC17A1). Only 2 loci (SLC2A9, ABCG2) Rapamycin supplier showed genome-wide significant association with gout. The genetic urate score was strongly associated with serum urate and gout (odds ratio, 12.4 per 100 mu mol/L; P=3×10(-39)) but not with blood pressure, glucose, estimated glomerular filtration rate, chronic kidney disease, or CHD. The lack of association between the genetic score and the latter phenotypes also was observed in the Women’s Genome Health Study.

Conclusions-The genetic urate score analysis suggested a causal relationship between serum urate and gout but did not provide evidence for one between serum urate and cardiovascular risk factors and CHD. (Circ Cardiovasc Genet. 2010;3:523-530.)”
“Few studies in community settings have Copanlisib nmr evaluated predictors, mediators, and moderators of treatment success for medically supervised opioid

withdrawal treatment. This report presents new findings about these factors from a study of 344 opioid-dependent men and women prospectively randomized to either buprenorphine-naloxone or clonidine in an open-label 13-day medically Supervised withdrawal study. Subjects were either inpatient or Outpatient in Community treatment settings, however not randomized by treatment setting. Medication type (buprenorphine-naloxone versus clonidine) was the single best predictor of treatment retention and treatment success, regardless of treatment setting. Compared to the outpatient setting, the inpatient setting was associated with higher abstinence rates but similar retention rates when adjusting for medication type. Early opioid withdrawal severity mediated the relationship between medication type and treatment outcome with buprenorphine-naloxone being Superior to clonidine at relieving early withdrawal symptoms.

Echocardiography is sufficient in most cases for prenatal and pos

Echocardiography is sufficient in most cases for prenatal and postnatal diagnosis of CHD and to plan an intervention, with cardiac MRI and CT providing complementary information on vascular and extracardiac abnormalities. During follow-up, cardiovascular dysfunction is an important cause of reintervention and death. Therefore, routine evaluation of systolic, diastolic, valvular, and vascular function is essential in the

care of patients with CHD. Application of echocardiography, cardiac MRI, and CT https://www.selleckchem.com/products/chir-99021-ct99021-hcl.html during follow-up of patients with CHD ideally identifies patients at risk of adverse outcomes, and elucidates the pathophysiological mechanisms that underlie cardiovascular dysfunction. The advent of advanced imaging strategies might further improve the detection of subclinical cardiovascular failure, although further study is required to establish the value of these techniques. Finally, imaging beyond the heart is essential for the complete understanding of the interaction between CHD and noncardiac selleck screening library organ systems, and to extend the success of increased survival to improvements in long-term functional outcome.”
“Aim: To report

a reconstructive technique of large vesicovaginal fistula repairs, which is a rare complication of the most modern anti-incontinence procedures (tension-free tapes) using the “”oldie but goodie”" Lehoczky’s island flap. Methods: Women with large vesicovaginal fistulas caused by mid-urethral transobturator tape were operated in our department. The transobturator tape was removed and the large fistula was closed using the skin island flap. The flap was created from the regional skin and subcutaneous tissue and pulled with intact vascular supply through a paravaginal tunnel to the site of the vaginal defect. Results: No complications occurred after the reconstructions. The patients have become permanently continent and free from fistulas. Conclusions: Mid-urethral transobturator sling is a successful

procedure evidenced worldwide with a very low rate of fistula formation. Lehoczky’s island flap can be a reasonable and safe surgical SC79 research buy option in the repair of large defects of the vaginal wall. Neurourol. Urodynam. 30:1530-1532, 2011. (C) 2011 Wiley Periodicals, Inc.”
“The rise of bariatric surgery has lead to an increasing number of reoperations for failed bariatric procedures. The reasons and types of these operations are varied in nature and remain to be defined.

A retrospective review of a prospectively collected database was conducted to identify patients who underwent laparoscopic revisional surgery for non-gastric banding-related bariatric procedures between 2001 and 2008.

Of 384 secondary bariatric operations, 151 reoperative procedures were performed. Twenty-six vertical banded gastroplasties (17.2%), 2 mini-gastric bypasses (1.3%), 2 non-divided bypasses (1.3%), 1 distal Roux-en-Y gastric bypass (RYGBP; 0.

gov as NCT00753818 Am J Clin Nutr 2010; 91: 848-59 “
“Backg

gov as NCT00753818. Am J Clin Nutr 2010; 91: 848-59.”
“Background and aims: Coffee and caffeine are widely consumed in Western countries. Little information is available on the influence of coffee and caffeine consumption on atrial fibrillation (AF) in hypertensive patients. We sought to investigate the relationship between coffee consumption and atrial fibrillation with regard to spontaneous conversion of arrhythmia.

Methods and results: A group of 600 patients presenting with a first known episode of AF was investigated, and we identified 247 hypertensive patients. The

prevalence of nutritional parameters was assessed with a food frequency questionnaire. Coffee and caffeine intake were CX-6258 JAK/STAT inhibitor specifically estimated. Left ventricular hypertrophy was evaluated by electrocardiogram (ECG) and echocardiogram. Coffee consumption was higher in normotensive patients. High coffee consumers were more frequent GW4869 Apoptosis inhibitor in normotensive patients compared with

hypertensive patients. On the other hand, the intake of caffeine was similar in hypertensive and normotensive patients, owing to a higher intake in hypertensive patients from sources other than coffee. Within normotensive patients, we report that non-habitual and low coffee consumers showed the highest probability of spontaneous conversion (OR 1.93 95% CI 0.88-3.23; p = 0.001), whereas, within hypertensive patients, moderate but not high coffee consumers had the lowest probability of spontaneous conversion (OR 1.13 95% CI 0.67-1.99; p = 0.05).

Conclusion: Coffee and caffeine consumption influence spontaneous conversion of atrial fibrillation. Normotensive non-habitual coffee consumers are more likely to convert arrhythmia within 48 h from the onset of symptoms. Hypertensive patients showed a U-shaped relationship between coffee consumption and spontaneous conversion

of AF, moderate coffee consumers were less likely to show spontaneous conversion of arrhythmia. Patients with left ventricular hypertrophy showed a reduced rate of spontaneous conversion of arrhythmia. (C) 2009 Elsevier B. V. All rights reserved.”
“We report on the fabrication of ordered hexagonal arrays of air-spaced 4SC-202 solubility dmso GaN nanopillars by nanosphere lithography. A self-assembled two-dimensional silica nanosphere mask was initially formed by spin-coating. Prior to pattern transfer to the GaN substrate, a silica-selective dry etch recipe was employed to reduce the dimensions of the nanospheres, without shifting their equilibrium positions. This process step was crucial to be formation of air-spaced hexagonal arrays of nanospheres, as opposed to closed-packed arrays normally achieved by nanosphere lithography. This pattern is then transferred to the wafer to form air-spaced nanopillars. By introducing air gaps between pillars, a photonic band gap (PBG) in the visible region can be opened up, which is usually nonexistent in closed-packed nanopillar arrays.