The Resistance of Cancer Cells to Palbociclib, a Cyclin-Dependent Kinase 4/6 Inhibitor, is Mediated by the ABCB1 Transporter.

Palbociclib was approved by the United States Food and Drug Administration for use, in combination with letrozole, as a first-line treatment for estrogen receptor-positive/human epidermal growth factor receptor 2-negative (ER+/HER2-) postmenopausal metastatic breast cancer. However, recent studies show that palbociclib may be an inhibitor of the ABCB1 transporter, although this remains to be elucidated. Therefore, we conducted experiments to determine the interaction of palbociclib with the ABCB1 transporter.

VKNG-1 Antagonizes ABCG2-Mediated Multidrug Resistance via p-AKT and Bcl-2 Pathway in Colon Cancer: In Vitro and In Vivo Study.

The emergence of multidrug resistance (MDR) to chemotherapeutic drugs is a major problem in the therapy of cancer. Knowledge of the mechanisms of drug resistance in cancer is necessary for developing efficacious therapies. ATP-binding cassette (ABC) transporters are transmembrane proteins that efflux chemotherapeutic drugs from cancer cells, thereby producing MDR.

Role of B-Cell Lymphoma 2 Ovarian Killer (BOK) in Acute Toxicity of Human Lung Epithelial Cells Caused by Cadmium Chloride.

BACKGROUND B-cell lymphoma 2 (BCL-2) ovarian killer (BOK) is a Bcl-2 family member with sequence homology to pro-apoptotic BAX and BAK, but its physiological and pathological roles remain largely unclear. Exposure of cells to cadmium may cause DNA damage, decrease DNA repair capacity, and increase genomic instability. MATERIAL AND METHODS The present study investigated the effects of BOK on the toxicity of cadmium chloride (CdCl₂) to human bronchial epithelial (16HBE) cells.

[Effects of hexabromocyclododecanes on retinoid X receptor α, pregnane X receptor and peroxisome proliferator-activated receptor γ].

Objective: To investigate the effect of hexabromocyclododecanes( HBCDs) on cell proliferation and the expression of the three important cell nuclear receptor of retinoic X receptor α( RXRα), peroxisome proliferator-activated receptor-γ( PPARγ), pregnane X receptor( PXR) and their interaction in Neuro-2a(N2a).

Methods: Neuro-2a cells were treated with different concentrations of diastereoisomers, of HBCDs which were α-HBCD, β-HBCD, γ-HBCD, respectively, and cell toxicity was analyzed using the cell counting kit-8( CCK-8) assay. The impact of HBCDs on cell cycles of Neuro-2a were analyzed by flow cytometry analysis, and the expression levels in mRNA and protein for the three nuclearreceptors( RXRα, PPARγ, PXR andits target genes CYP3A11) were determined by RT-PCR and Western blot, respectively.

Spatiotemporal variability of polybrominated diphenyl ether concentration in atmospheric fine particles in Shenzhen, China.

Polybrominated diphenyl ethers (PBDEs) are widely used as flame retardants for various products and have become ubiquitous pollutants in environmental media. However, little is known about PBDE levels in Shenzhen, a manufacturing center of electronic products. This study aimed to investigate spatiotemporal variability of PBDE concentration in atmospheric fine particles (PM) and to estimate the daily inhalation exposure doses for local residents in Shenzhen, China.

Epidermal growth factor receptor (EGFR) inhibitor PD153035 reverses ABCG2-mediated multidrug resistance in non-small cell lung cancer: In vitro and in vivo.

One of the major mediators of multidrug resistance (MDR) in non-small cell lung cancer (NSCLC) is the overexpression of ATP-binding cassette subfamily G member 2 (ABCG2). In this study, we conducted in vitro and in vivo experiments to determine whether PD153035, an inhibitor of EGFR, could reverse ABCG2-mediated MDR in human NSCLC and transfected cells overexpressing ABCG2. The efficacy of SN-38, topotecan, and mitoxantrone (MX) were significantly increased by PD153035, PD153035 significantly reversed ABCG2-mediated MDR by attenuating the efflux activity of this transporter.

Validation of the chinese version of the EORTC QLQ-CR29 in patients with colorectal cancer.

Aim: To assess the validity and reliability of the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire-Colorectal Cancer 29 (EORTC QLQ-CR29) in Chinese patients with colorectal cancer (CRC).

Methods: From March 2014 to January 2015, 356 patients with CRC from four different hospitals in China were enrolled in the study, and all patients self-administered the EORTC QLQ-CR29 and the quality of life core questionnaire (EORTC QLQ-C30). Evaluation of the scores was based on the Karnofsky Performance Scale (KPS).

LncRNA-MALAT1 as a novel biomarker of cadmium toxicity regulates cell proliferation and apoptosis.

Cadmium (Cd) and its compounds are well-known human carcinogens, but the mechanisms underlying the carcinogenesis are not well understood. This study aimed to investigate whether lncRNA-MALAT1 could serve as a novel biomarker of Cd toxicity in cells, animals and Cd-exposed workers, and regulate cell proliferation, apoptosis, migration and invasion. MALAT1 expression increased gradually in CdCl transformed 16HBE cells.

Sleep quality and health service utilization in Chinese general population: a cross-sectional study in Dongguan, China.

Objectives: The aims of this study were to explore the Pittsburgh Sleep Quality Index (PSQI) and health service utilization in Chinese general population, to investigate the association between PSQI and health service utilization and to identify the independent contributions of social demographic variables, health related factors and PSQI to health service utilization.

Methods: In a cross-sectional community-based health survey using a multi-instrument questionnaire, 4067 subjects (≥15 years old) were studied. The Chinese version of the PSQI was used to assess sleep quality.

Serum albumin level is associated with the recurrence of acute ischemic stroke.

Background: Previous studies have confirmed that low serum albumin levels in acute ischemic stroke patients increased the risk for poor outcome and death, demonstrating the neuroprotective role of albumin. However, there are few studies investigating the relationship between albumin levels and recurrence of stroke. The aim of this study was to evaluate the effect of serum albumin level on the risk of recurrence in patients with acute ischemic stroke.

Dietary intake and urinary level of cadmium and breast cancer risk: A meta-analysis.

Cadmium, a human carcinogenic heavy metal, has been reported to be associated with breast cancer risk; however, the results from the epidemiological studies are not always consistent. The objective of this study was to quantitatively summarize the current evidence for the relationship between cadmium exposure and breast cancer risk using meta-analysis methods. Six studies determining the dietary cadmium intake level and five studies evaluating the urinary cadmium level were identified in a systematic search of MEDLINE and PubMed databases, and the associations between these levels and breast cancer risk were analysed.

regulates migration, invasion and apoptosis in cadmium transformed 16HBE cells and is a novel biomarker of cadmium exposure in a rat model and in workers.

Translation (eukaryotic) initiation factor 3 ( or ) has been found to be a proto-oncogene in cadmium (Cd) response both and , but whether may serve as a biomarker of Cd exposure is still unclear. This study aimed to investigate whether could serve as a novel biomarker of Cd toxicity in cells, animals and workers, and regulate the apoptosis, migration and invasion in human bronchial epithelial cell (16HBE cells) transformation with cadmium chloride (CdCl). In CdCl transformed 16HBE cells, expression increased gradually, and sequencing did not identify mutation and methylation of .

Reliability and Construct Validity of Two Versions of Chalder Fatigue Scale among the General Population in Mainland China.

The 14-item Chalder Fatigue Scale (CFS) is widely used, while the 11-item version is seldom to be found in current research in mainland China. The objectives of the present study is to compare the reliability and construct validity between these two versions and to confirm which may be better for the mainland Chinese setting. Based on a cross-sectional health survey with a constructive questionnaire, 1887 individuals aged 18 years or above were selected.

The Effect on Sodium/Iodide Symporter and Pendrin in Thyroid Colloid Retention Developed by Excess Iodide Intake.

It is well known that excess iodide can lead to thyroid colloid retention, a classic characteristic of iodide-induced goiter. However, the mechanism has not been fully unrevealed. Iodide plays an important role in thyroid function at multiple steps of thyroid colloid synthesis and transport among which sodium/iodide symporter (NIS) and pendrin are essential.

Workplace Violence and Job Performance among Community Healthcare Workers in China: The Mediator Role of Quality of Life.

Objective: To explore the impact of workplace violence on job performance and quality of life of community healthcare workers in China, especially the relationship of these three variables.

Methods: From December 2013 to April 2014, a total of 1404 healthcare workers were recruited by using the random cluster sampling method from Community Health Centers in Guangzhou and Shenzhen. The workplace violence scale, the job performance scale and the quality of life scale (SF-36) were self-administered.

MicroRNAs-mRNAs Expression Profile and Their Potential Role in Malignant Transformation of Human Bronchial Epithelial Cells Induced by Cadmium.

Background: Our study was designed to elucidate whether there were miRNA and mRNA aberrantly expression profiles and potential role in malignant transformation of 16HBE induced by Cd.

Methods: mRNA and miRNA expression profiles were determined in 35th Cd-induced 16HBE and untreated 16HBE by microarray. A series of bioinformatics analyses such as predicting targets, GO, KEGG were performed to find DEGs, coexpressing networks between miRNAs and mRNAs and its functions.

Long non-coding RNAs as novel expression signatures modulate DNA damage and repair in cadmium toxicology.

Increasing evidence suggests that long non-coding RNAs (lncRNAs) are involved in a variety of physiological and pathophysiological processes. Our study was to investigate whether lncRNAs as novel expression signatures are able to modulate DNA damage and repair in cadmium(Cd) toxicity. There were aberrant expression profiles of lncRNAs in 35th Cd-induced cells as compared to untreated 16HBE cells.

[Levels of polychlorinated dibenzo-p-dioxins and dibenzofurans in airborne fine particulate matter and inhalation risk assessment for local residents of Shenzhen].

Objective: To explore the levels and congener profiles of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) in airborne fine particulate matter (PM25) in Shenzhen and roughly discuss its correlations between PM25 concentration and meteorological factors.

Methods: The high volume air samplers were used to collect the samples in six sampling sites in respective winter and spring phase and summer and autumn phase. Referring to the US EPA TO-9A for dioxins detection methods, the concentrations of the 17 polychlorinated dibenzo-p-dioxins and dibenzofurans in airborne fine particulate matter were determined by HRGC/HRMS.

Prevalence and risk factors of posttraumatic stress disorder among survivors five years after the "Wenchuan" earthquake in China.

Objective: The aim of this study was to investigate the prevalence of posttraumatic stress disorder (PTSD) and its risk factors among survivors in a heavily-hit area five years after the Wenchuan earthquake in 2008, China.

Methods: 684 survivors from Beichuan county, the center of the Wenchuan Earthquake in 2008, were evaluated using the PTSD Checklist-Civilian Version (PCL-C) questionnaire in 2013.

Results: The prevalence of PTSD among survivors was 9.

A community-based cross-sectional study of fatigue in middle-aged and elderly women.

Background: Fatigue has been widely studied in the general population; however, limited studies have investigated it in the female population. The objectives of this community-based study were to (1) investigate the prevalence of fatigue, (2) explore the relationship between gynecological history and experiences of fatigue, and (3) identify risk factors for fatigue in middle-aged and elderly women.

Methods: Based on a cross-sectional health study that employed a multi-instrument questionnaire, 1272 women aged 45years or older dwelling in the community were included.

Effects of tea polyphenols on proliferation and apoptosis of cadmium-transformed cells.

To investigate the roles and mechanism(s) of epigallocatechin gallate (EGCG) in carcinogenesis in malignant transformed cell line, cadmium-induced malignant transformed cells were treated with different doses of EGCG. Then cell proliferation, cell apoptosis, hTERT mRNA and protein level, and c-Myc protein levels were measured at different time points. EGCG was found to inhibit cell proliferation in a dose-dependent manner.

Community-based interventions in hypertensive patients: a comparison of three health education strategies.

Background: Community-based health education programs may be helpful in improving health outcomes in patients with chronic illnesses. This study aimed to evaluate community-based health education strategies in the management of hypertensive patients with low socioeconomic status in Dongguan City, China.

Methods: This was a randomized, non-blinded trial involving 360 hypertensive patients enrolled in the community health service centre of Liaobu Town, Dongguan City, China.

Influence of health-related quality of life on health service utilization in Chinese rural-to-urban female migrant workers.

Background: Rural-to-urban migrant workers have been increasing rapidly in China over recent decades. Health related quality of life (HRQOL) may affect health service utilization. There is a lack of data on HRQOL in relation to health service utilization in Chinese rural-to-urban migrant workers.

Effect on metabolic enzymes and thyroid receptors induced by BDE-47 by activation the pregnane X receptor in HepG2, a human hepatoma cell line.

2,2',4,4'-Tetra-bromodiphenyl ether (BDE-47), an important congener among polybrominated diphenyl ether (PBDE) compounds, has been predominantly in environmental samples and human tissue. Thyroid disruption is the most sensitive endpoint effect among a number of health effects of exposure to BDE-47 in animals and humans. However, the detailed underlying mechanisms in humans are not well understood.