Correction: The Rho/ROCK pathway for lysophosphatidic acid-induced proteolytic enzyme expression and ovarian cancer cell invasion

The original version of this article contained an error in the published figures Fig 2 and Fig 3f, where the information was inadvertently duplicated. This error does not alter the conclusions of the paper. The corrected figures are published in this correction notice. The authors sincerely apologize for this error.

Highly efficient InGaN green mini-size flip-chip light-emitting diodes with AlGaN insertion layer

We demonstrate highly efficient InGaN-based mini-size green light-emitting diodes (mLEDs) with AlGaN insertion layer in InGaN/GaN multiple quantum wells (MQWs) using metal organic chemical vapor deposition (MOCVD). High resolution transmission electron microscopy (HRTEM) results reveal that 'V' defects within active region can be effectively reduced by AlGaN insertion layer. Photoluminescence (PL) and time resolved photoluminescence (TRPL) results indicate an increase of radiative recombination efficiency. Very high performance 523 nm InGaN green flip-chip mLEDs (0.025 mm²) with distributed Bragg reflector (DBR) show a high external quantum efficiency (EQE) of 38.0%, a high wall-plug efficiency (WPE) of 32.1% and a low forward voltage of 2.8 V at a working current density of 20 A cm^-2, which are very promising for display application.

[HIV and syphilis infection and related medical treatment status of low-fee female sex workers in three provinces of China, 2012-2015]

Objective: To understand the HIV and syphilis infection and related treatment status of low-fee female sex workers (FSWs) in 3 provinces of China. Methods: Four cross-sectional survey data of low-fee FSWs from six cities (counties) in Guangxi, Yunnan and Hunan Province between October 2012 and July 2015 were obtained from the national science and technology major special project intervention study for reducing sexually transmitted diseases (STDs) and acquired immunodeficiency syndrome (AIDS) in low-fee FSWs' database, which included social demographic characteristics, sexual service characteristics and related medical care seeking behaviors, etc. A total of 2 050 subjects were included in the database. Results: The age of the subjects was (35.16±9.76) years old, with a minimum age of 15 and a maximum age of 67. Those who use condoms every time in commercial sex accounted for 58.9% (n=1 206). Among the reasons of not using condom, the proportion of client reluctant to use was the highest (81.0% (n=682)). Only 38.1% (n=782) was tested for HIV in the last six months. HIV confirmed positive rate was 6.8% (n=139), previous positive accounts for 76.3% (n=106). Rate of antiviral therapy was 55.4% (n=77). By the end of 2015, the loss rate of antivirus treatment was 18.2% (n=14). Those who self-reported symptoms of sexually transmitted diseases in the last 6 months accounted for 9.4% (n=191). 50.3% (n=96) of reporters chose to go to formal hospitals, 23.0% (n=44) chose to go to private clinics and 20.4% (n=39) chose their own medication. The syphilis infection rate was 13.5% (n=277), among them, 91.3% (n=253) were asymptomatic. Conclusion: Among low-fee FSWs, the rates of HIV and syphilis infection are higher, the condom consistent use rate, HIV antibodies and syphilis test rate are lower. In this group, active seeking medical idea is poor, the rate of anti-virus treatment and the rate of seeking medical treatment in formal medical institutions is low.

Abstract P3-03-29: Evaluation of a direct reverse transcription loop-mediated isothermal amplification method without RNA extraction (direct RT-LAMP) for the detection of lymph node metastasis in early breast cancer

Backgroud: The detection of lymph node metastasis by reverse transcription loop-mediated isothermal amplification method (RT-LAMP) had been studied previously. Even though, RT-LAMP method provides improved performance compared to intraoperative histology sentinel lymph node (SLN) evaluation, direct RT-LAMP method without RNA extraction can be more efficient and easily accessible process. Therefore, we evaluated the performance and efficacy of a direct reverse transcription loop-mediated isothermal amplification (direct RT-LAMP) assay for visual detection of CK19, CK20, and CEA mRNAs to identify lymph node metastasis in patients with early breast cancer.

Methods: A total of 92 lymph nodes dissected from 40 patients with breast cancer were collected at the breast cancer center of Kyungpook National University Chilgok Hospital between November 2015 and February 2016. All of the samples were analyzed by direct RT-LAMP assay and routine histopathology examination. Cutoff values to distinguish metastasis and nonmetasis were determined by measuring cytokerain 19 (CK19) mRNA in histopathologically positive and negative lymph node using direct RT-LAMP.

Results: We set the cutoff value of direct RT-LAMP assay for CK 19 mRNA at 1ng to distinguish status of LN metastasis. The sensitivity and specificity of the RT-LAMP assay were 85.7% and 100%, respectively. The positive predictive value and negative predictive value were 100% and 94.4%.

Conclusion: Direct RT-LAMP assay can allow detection of SLN metastasis in breast cancer patients intraoperatively with a good sensitivity through cost-effective and time–saving manner.

Citation Format: Lee IH, Jung J, Lee S, Lee J, Lee RK, Park H, Jung J, Kang J, Chae Y. Evaluation of a direct reverse transcription loop-mediated isothermal amplification method without RNA extraction (direct RT-LAMP) for the detection of lymph node metastasis in early breast cancer [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P3-03-29.

Abstract P6-05-10: MicroRNA-137 inhibits cancer progression by targeting DEL-1 in triple negative breast cancer cells, MDA-MB-231

Background: This study aimed to investigate the function of microRNA-137 in Del-1 expression in triple negative breast cancer (TNBC) cells and tissues.

Methods: The Del-1 mRNA and microRNA levels were measured using a qRT-PCR in breast cancer cells (MDA-MB-231, MCF7, SK-BR3, and T-47D) and tissues from 20 patients with TNBC. The effects of miR-137 on cell proliferation, migration, and invasion were determined using MTT, wound healing, and Matrigel Transwell assays.

Results: microRNA-137 (miR-137) levels were remarkably low and Del-1 mRNA expression was higher in MDA-MB-231 cells as compared to other breast cancer cell lines. The luciferase reporter assay revealed that miR-137 binds directly at the 3¢-UTR of Del-1 and that Del-1 expression was downregulated by miR-137 mimics and rescued by its inhibitors. Furthermore, miR-137 inhibited the cell proliferation, migration, and invasion of MDA-MB-231 cells. Moreover, among the 30 TNBC specimens, miR-137 was downregulated (p <0.0001) and the level of Del-1 in plasma was significantly elevated as compared to normal controls (p < 0.0001).

Conclusions: In conclusion, miR-137 regulates Del-1 expression in TNBC via directly binding to the Del-1 gene, and thereby affects cancer progression. This suggests that miR-137 may be a new therapeutic biomarker for patients with TNBC.

Keywords: Del-1, triple negative breast cancer, miR-137, biomarker

Citation Format: Chae YS, Baek DW, Lee IH, Lee SJ, Lee RK, Lee J, Jung J, Park H, Jeong J-H, Kang J, Park J. MicroRNA-137 inhibits cancer progression by targeting DEL-1 in triple negative breast cancer cells, MDA-MB-231 [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P6-05-10.

How Much Intake of Sodium Is Good for Frailty?: The Korean Frailty and Aging Cohort Study (KFACS)

OBJECTIVE

The aim of this study was to determine how sodium intake can affect frailty, but not anorexia, in community-dwelling older adults in Korea.

DESIGN

This was a cross-sectional study.

SETTING

The study used data from the Korean Frailty and Aging Cohort Survey (KFACS), a multi-center longitudinal study addressing 10 centers across urban, rural, and suburban communities in Korea, between 2016 and 2017.

PARTICIPANTS

A total of 954 older adults who underwent both 24-hour dietary recall assessment and physical function test during the first-year baseline investigation of the KFACS.

MEASUREMENTS

Frailty was determined according to the Fried frailty index (FFI).

RESULTS

Of the 954 participants, 461 (48.3%) were male and the mean age was 76.3 years old. The average daily sodium intake was 3857 mg. The frailty prevalence in first to third quartiles was 21.8%, 7.5%, and 5.4%, respectively, and increased in the fourth quartile of sodium intake to 8.9%. Using the second quartile of sodium intake (2504-3575 mg) as reference, the odds ratios of frailty were 1.64 (95% confidence interval: 0.84-3.22), 1.33 (0.57-3.06), and 4.00 (1.72-9.27) for the first (<2504 mg), third (3575-4873 mg), and fourth (≥4873 mg) quartiles, respectively, in a multivariate-adjusted analysis.

CONCLUSION

Low sodium intake (<2504 mg) is related to frailty in older people, but it seems to be a less important factor than other nutritional factors. The prevalence of frailty did not increase up to a daily sodium intake of 3575 mg, but it increased upon a daily sodium intake higher than 3575 mg.

Effect of early probiotic supplementation on childhood cognition, behaviour and mood a randomised, placebo-controlled trial

AIM

To determine whether probiotic supplementation in early life improves neurocognitive outcomes assessed at 11 years of age.

METHODS

A total of 474 children who were born March 2004-Aug 2005 participated in a two-centre randomised placebo-controlled trial of infants at risk of developing allergic disease. Pregnant women were randomised to take Lactobacillus rhamnosus strain HN001, Bifidobacterium animalis subsp. lactis strain HN019 or placebo daily from 35 weeks gestation until six months if breastfeeding, and their infants the same treatment from birth to two years. Intelligence, executive function, attention, depression and anxiety were assessed when the children were 11 years of age.

RESULTS

A total of 342 (72.2%) children were assessed (HN001 n = 109, HN019 n = 118 and placebo n = 115). Overall, there were no significant differences in the neurocognitive outcomes between the treatment groups.

CONCLUSION

HN001 and HN019 given in early life were not associated with neurocognitive outcomes at 11 years of age in this study. However, we cannot exclude that other probiotics may have a beneficial effect. Further clinical trials are indicated.

Constraints on Primordial Gravitational Waves Using Planck, WMAP, and New BICEP2/Keck Observations through the 2015 Season

We present results from an analysis of all data taken by the bicep2/Keck CMB polarization experiments up to and including the 2015 observing season. This includes the first Keck Array observations at 220 GHz and additional observations at 95 and 150 GHz. The Q and U maps reach depths of 5.2, 2.9, and 26  μK_{CMB} arcmin at 95, 150, and 220 GHz, respectively, over an effective area of ≈400 square degrees. The 220 GHz maps achieve a signal to noise on polarized dust emission approximately equal to that of Planck at 353 GHz. We take auto and cross spectra between these maps and publicly available WMAP and Planck maps at frequencies from 23 to 353 GHz. We evaluate the joint likelihood of the spectra versus a multicomponent model of lensed-ΛCDM+r+dust+synchrotron+noise. The foreground model has seven parameters, and we impose priors on some of these using external information from Planck and WMAP derived from larger regions of sky. The model is shown to be an adequate description of the data at the current noise levels. The likelihood analysis yields the constraint r_{0.05}<0.07 at 95% confidence, which tightens to r_{0.05}<0.06 in conjunction with Planck temperature measurements and other data. The lensing signal is detected at 8.8σ significance. Running a maximum likelihood search on simulations we obtain unbiased results and find that σ(r)=0.020. These are the strongest constraints to date on primordial gravitational waves.

[The diagnosis and treatment of traumatic optic nerve neuropathy combined with carotid artery injury]

Objective: To discuss the diagnosis and treatment strategy of traumatic optic nerve neuropathy (TON) combined with carotid artery injury. Methods: Retrospective analyses were performed 397 cases of TON at Neurosurgery department of Beijing Tongren Hospital, Capital Medical University (CMU), from January 2016 to December 2017.The clinical experience was concluded. Results: 9 cases of Traumatic Pseudo Aneurysm (TPA) and 16 cases of Traumatic Carotid Artery-Cavernous Sinus Fistula (TCCF) were found.7 cases of TPA were treated by covered stent, the other 2 cases were treated by detachable balloons.11 cases of TCCF were treated by detachable balloons, and 5 cases of fistulas were found spontaneously closed by DSA after 1-3 months.There was no disability rate and mortality in this study. Conclusion: TON combined with carotid artery injury was a critical situation, and sometime without obvious symptoms and sign, which was easily miss diagnosed.It should be with more concern in diagnosing and treating in such cases, to avoid disability rate and mortality.

'Nausicaa' compression suture: a simple and effective alternative to hysterectomy in placenta accreta spectrum and other causes of severe postpartum haemorrhage

Postpartum haemorrhage (PPH), especially resulting from placenta accreta spectrum (PAS), has become a worldwide concern in maternity care. We describe a novel method of uterine compression sutures (the ‘Nausicaa’ technique) as an alternative to hysterectomy for patients who have suffered from major PPH. We applied this technique in 68 patients with major PPH during caesarean section (including 43 patients with PAS, 20 patients with placenta praevia totalis, and five patients with uterine atony), and none of these patients required further hysterectomy. We conclude that our Nausicaa suture is a simple and feasible alternative to hysterectomy in patients suffering from major PPH.

Hypoplastic AI with Highly Variable Expressivity Caused by ENAM Mutations

Tooth enamel, the hardest tissue in the human body, is formed after a complex series of interactions between dental epithelial tissue and the underlying ectomesenchyme. Nonsyndromic amelogenesis imperfecta (AI) is a rare genetic disorder affecting tooth enamel without other nonoral symptoms. In this study, we identified 2 novel ENAM mutations in 2 families with hypoplastic AI by whole exome sequencing. Family 1 had a heterozygous splicing donor site mutation in intron 4, NM_031889; c.123+2T>G. Affected individuals had hypoplastic enamel with or without the characteristic horizontal hypoplastic grooves in some teeth. Family 2 had a nonsense mutation in the last exon, c.1842C>G, p.(Tyr614*), that was predicted to truncate the protein by 500 amino acids. Participating individuals had at least 1 mutant allele, while the proband had a homozygous mutation. Most interestingly, the clinical phenotype of the individuals harboring the heterozygous mutation varied from a lack of penetrance to a mild hypoplastic enamel defect. We believe that these findings will broaden our understanding of the clinical phenotype of AI caused by ENAM mutations.

Performance evaluation of histone deacetylases in lungs of mice exposed to ovalbumin aerosols

This study was to investigate expression levels and functional activities of histone deacetylases (HDACs) with potential therapeutic targets selected in animal model of allergic asthma. Mice were sensitized and then challenged with saline (control) or ovalbumin (OVA) for 8 weeks. Airway resistance was determined by increasing concentrations of acetyl-β-methacholine chloride (0 - 50 mg/ml). The number of cells and cytokine production in bronchoalveolar lavage fluid (BALF) were determined by ELISA. Pathological changes of lung specimens were examined by histochemical staining methods under the light microscope. Expression and quantification of HDACs in lungs were measured using immunohistochemistry and Western blotting analysis. HDAC activity was identified using colorimetric and fluorometric methods. The OVA-treated mice had a significant enhancement in airway resistance with a large number of cells and increased interleukin (IL)-4 and -5 levels in BALF. Morphologically, an infiltration of inflammatory cells into epithelial layer with mucus accumulation and subepithelial fibrosis were seen in the OVA-exposed lungs. The expression levels for HDAC1, HDAC5, HDAC6, and HDAC8 were significantly elevated with weak induction of HDAC 2-4, which was identical with their catalytic activities detected in the lungs. In contrast, HDAC1 and HDAC5 activities were higher than others in the lungs. Individual HDACs are differently regulated in expression levels and functional activities in animal model of allergic asthma. Selective targeting of HDAC1/5 offers an opportunity to improve therapeutic effects of the disease.

Dental implications in Hajdu-Cheney syndrome: A novel case report and review of the literature

OBJECTIVE

To identify the molecular genetic etiology of an individual with a dysmorphic face, unusual teeth mobility, and root resorption.

SUBJECTS AND METHODS

DNA samples were collected from a trio of family members, and whole-exome sequencing was performed.

RESULTS

Mutational analysis revealed a de novo mutation (c.6787C>T) in the last exon of the NOTCH2 gene. This mutation would introduce a premature stop codon [p.(Gln2263*)] and generate a truncated protein without C-terminus, escaping from the nonsense-mediated decay system. Sanger sequencing confirmed that this mutation was generated spontaneously.

CONCLUSIONS

In this study, we identified a novel nonsense mutation in the last exon of the NOTCH2 gene causing Hajdu-Cheney syndrome. We described the genotype and phenotype correlation and the related dental complications. These results will advance the understanding of the NOTCH2 signaling in periodontitis and root resorption.