-
[show abstract]
[hide abstract]
ABSTRACT: Studies exploring the perceptions of patients whose lives are maintained by mechanical ventilation highlight the stressful nature of this type of experience. The objective of this meta-synthesis study was to describe the nature of the experience of adult ventilator-dependent patients. A systematic literature search of English and Chinese databases was undertaken, covering the period between 1970 and 2012. Qualitative research findings were extracted and pooled using the Joanna Briggs Institute Qualitative Assessment and Review Instrument. A total of 1004 papers were identified from various database and hand searches. Nineteen papers were critically appraised and 16 met inclusion criteria. Five meta-synthesis themes emerged from the analysis: (1) the feelings of fear due to being dependent on a ventilator and the loss of control of life; (2) disconnection with reality; (3) impaired embodiment; (4) construction of coping patterns; (5) trust and caring relationship. Suggested implications for practice include enhancing the trust relationship with health professionals, as well as nursing actions throughout the suction procedure relating to release of patient's psychological distress and empowering their resilience factors.
Nursing and Health Sciences 03/2013; · 0.68 Impact Factor
-
[show abstract]
[hide abstract]
ABSTRACT: Children and adolescents with cancer are confronted with many challenges. This review considered studies that used qualitative methods to examine the body image experience of children and adolescents with cancer. A systematic literature search of English and Chinese databases was undertaken, covering the period between 1960 and October 2010. Qualitative research findings were extracted and pooled using the Joanna Briggs Institute Qualitative Assessment and Review Instrument. Eight papers met the inclusion criteria. The derived four metasyntheses included being distanced from the body, loss of self-identity, self-protective strategies and support, and getting rid of the shackles of the body. In conclusion, children and adolescents with cancer also experience various problems associated with changes in their body image. Repeated courses of treatment lead to loss of a normal, orderly life, and might even result in changes in interpersonal interactions. In response to body image change, individuals with cancer develop self-protective, coping strategies. Children and adolescents who experience life-threatening cancer come to face body image change positively, and might hold a confident attitude toward their future.
Nursing and Health Sciences 06/2012; 14(3):381-90. · 0.68 Impact Factor
-
Ling-Ming Tseng,
Pin-I Huang,
Yu-Rung Chen, Yu-Chih Chen,
Yueh-Ching Chou,
Yi-Wei Chen,
Yuh-Lih Chang,
Han-Shui Hsu,
Yuan-Tzu Lan,
Kuan-Hsuan Chen,
Chin-Wen Chi,
Shih-Hwa Chiou,
De-Ming Yang,
Chen-Hsen Lee
[show abstract]
[hide abstract]
ABSTRACT: Anaplastic thyroid cancer (ATC) is a lethal solid tumor with poor prognosis because of its invasiveness and its resistance to current therapies. Recently, ATC-CD133+ cells were found to have cancer stem cell (CSC) properties and were suggested to be important contributors to tumorigenicity and cancer metastasis. However, the molecular pathways and therapeutic targets in thyroid cancer-related CSCs remain undetermined. In this study, ATC-CD133+ cells were isolated and found to have increased tumorigenicity, radioresistance, and higher expression of both embryonic stem cell-related and drug resistance-related genes compared with ATC-CD133 cells. Microarray bioinformatics analysis suggested that the signal transducer and activator of transcription 3 (STAT3) pathway could be important in regulating the stemness signature in ATC-CD133+ cells; therefore, the effect of the potent STAT3 inhibitor cucurbitacin I in ATC-CD133+ cells was evaluated in this study. Treatment of ATC-CD133+ cells with cucurbitacin I diminished their CSC-like abilities, inhibited their stemness gene signature, and facilitated their differentiation into ATC-CD133⁻ cells. Of note, treatment of ATC-CD133+ cells with cucurbitacin I up-regulated the expression of thyroid-specific genes and significantly enhanced radioiodine uptake. Furthermore, cucurbitacin I treatment increased the sensitivity of ATC-CD133+ cells to radiation and chemotherapeutic drugs through apoptosis. Finally, xenotransplantation experiments revealed that cucurbitacin I plus radiochemotherapy significantly suppressed tumorigenesis and improved survival in immunocompromised mice into which ATC-CD133+ cells were transplanted. In summary, these results show that the STAT3 pathway plays a key role in mediating CSC properties in ATC-CD133+ cells. Targeting STAT3 with cucurbitacin I in ATC may provide a new approach for therapeutic treatment in the future.
Journal of Pharmacology and Experimental Therapeutics 02/2012; 341(2):410-23. · 3.83 Impact Factor
-
Pei-Ming Chu,
Li-Hsin Chen,
Ming-Teh Chen,
Hsin-I Ma,
Tsann-Long Su,
Pei-Chen Hsieh,
Chian-Shiu Chien,
Bo-Hua Jiang, Yu-Chih Chen,
Yi-Hui Lin,
Yang-Hsin Shih,
Pang-Hsien Tu,
Shih-Hwa Chiou
[show abstract]
[hide abstract]
ABSTRACT: BO-1051 is an N-mustard derivative that is conjugated with DNA-affinic 9-anilinoacridine. Since BO-1051 was reported to have strong anticancer activity, we investigated the effect and underlying mechanism of BO-1051 in human glioma cell lines.
Human glioma cell lines U251MG and U87MG were studied with BO-1051 or the combination of BO-1051 and autophagic inhibitors. Growth inhibition was assessed by MTT assay. Apoptosis was measured by annexin V staining followed by flow cytometry and immunoblotting for apoptosis-related molecules. Induction of autophagy was detected by acridine orange labeling, electron microscopy, LC3 localization and its conversion. Transfection of shRNA was used to determine the involvement of Beclin1 in apoptotic cell death.
MTT assay showed that BO-1051 suppressed the viability of four glioma cell lines (U251MG, U87MG, GBM-3 and DBTRG-05MG) in a dose-dependent manner. The IC(50) values of BO-1051 for the glioma cells were significantly lower than the values for primary neurons cultures and normal fibroblast cells. Moreover, BO-1051 not only induced apoptotic cell death, but also enhanced autophagic flux via inhibition of Akt/mTOR and activation of Erk1/2. Importantly, suppression of autophagy by 3-methyladenine or bafilomycin A1 significantly increased BO-1051-induced apoptotic cell death in U251MG and U87MG cells. In addition, the proportion of apoptotic cells after BO-1051 treatment was enhanced by co-treatment with shRNA against Beclin1.
BO-1051 induced both apoptosis and autophagy, and inhibition of autophagy significantly augmented the cytotoxic effect of BO-1051. Thus, a combination of BO-1051 and autophagic inhibitors offers a potentially new therapeutic modality for the treatment of malignant glioma.
Cancer Chemotherapy and Pharmacology 09/2011; 69(3):621-33. · 2.83 Impact Factor
-
Chi-Hsien Peng,
Jong-Yuh Cherng,
Guang-Yuh Chiou, Yu-Chih Chen,
Chen-Hsiu Chien,
Chung-Lan Kao,
Yuh-Lih Chang,
Yueh Chien,
Liang-Kung Chen,
Jorn-hon Liu,
Shih-Jen Chen,
Shih-Hwa Chiou
[show abstract]
[hide abstract]
ABSTRACT: Cationic polyurethane, a biodegradable non-viral vector, protects DNA from nuclease degradation and helps to deliver genes efficiently. Oct4, a POU-domain transcription factor, is highly expressed in maintaining pluripotency and cellular reprogramming process in stem cells. SirT1, a NAD-dependent histone deacetylase, is an essential mediator of cellular longevity. Herein we demonstrated that both Oct4 and SirT1 (Oct4/SirT1) expression was decreased in an age-dependent manner in retina with aged-related macular degeneration and retinal pigment epithelium cells (RPEs). To investigate the possible rescuing role of Oct4/SirT1, polyurethane-short branch polyethylenimine (PU-PEI) was used to deliver Oct4/SirT1 into aged RPEs (aRPEs) or light-injured rat retinas. Oct4/SirT1 overexpression increased the expression of several progenitor-related genes and the self-renewal ability of aRPEs. Moreover, Oct4/SirT1 overexpression resulted in the demethylation of the Oct4 promoter and enhanced the expression of antioxidant enzymes, which was accompanied by a decrease in intracellular ROS production and hydrogen peroxide-induced oxidative stress. Importantly, PU-PEI-mediated Oct4/SirT1 gene transfer rescued retinal cell loss and improved electroretinographic responses in light-injured rat retinas. In summary, these data suggest that PU-PEI-mediated delivery of Oct4/SirT1 reprograms aRPEs into a more primitive state and results in cytoprotection by regulating the antioxidative capabilities of these cells.
Biomaterials 09/2011; 32(34):9077-88. · 7.40 Impact Factor
-
[show abstract]
[hide abstract]
ABSTRACT: : Research on cross-national marriages in Taiwan has concentrated on development and adaptation issues related to the children of such relationships. Taiwan has seen a dramatic increase in immigration and cultural diversity over the past 2 decades. Understanding the dynamics of cross-national families from initial courtship through marriage and having and raising children is, thus, important. Little research has been done on the role or caring experiences of the father in cross-national families.
: This study used the lived experiences of fathers in cross-national marriages with children to explore the essence of their role.
: Colaizzi's phenomenological approach was used to investigate subject experiences. Subjects were purposively chosen from a general hospital in Taiwan. Subject selection criteria included being a father in a cross-national marriage, having a child born in that marriage and the child was free of major health problems. Eleven fathers participated in the study. Sample size was determined by the saturation principle of phenomenology. Data collected included family demographic characteristics and open interview information. Narrative data were analyzed using Colaizzi's phenomenological approach. Trustworthiness was examined using principles from Lincoln and Guba.
: Subject experiences concentrated on four themes: (a)achievement of a life mission, (b) marital difficulties, (c) activities external to the framework of family life, and (d) majesty and responsibility.
: Fathers in the childbearing stage of cross-national marriages have experienced preparation for marriage, constructed a marital life together including relationships with other family members, and experienced the majesty and responsibility associated with their marriage. These findings provide knowledge for nurses that will help further enhance the role of fathers while developing and promoting family health within this subpopulation in Taiwan.
The journal of nursing research: JNR 09/2011; 19(3):210-9. · 0.69 Impact Factor
-
Pin-I Huang, Yu-Chih Chen,
Li-Hsin Chen,
Chi-Chang Juan,
Hung-Hai Ku,
Shih-Tien Wang,
Shih-Hwa Chiou,
Guang-Yuh Chiou,
Chin-Wen Chi,
Chuan-Chih Hsu,
Hsin-Chen Lee,
Liang-Kung Chen,
Chung-Lan Kao
[show abstract]
[hide abstract]
ABSTRACT: Mesenchymal stem cells (MSCs) are a multipotent cell type that can differentiate into non-hematopoietic cells, such as adipocytes. Adipocyte tissue is central to the regulation of energy balance. Two functionally different types of fat are present in mammals. White adipose tissue is the primary site for triglyceride storage, while brown adipose tissue is specialized in energy expenditure. Peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC-1α) controls several aspects of mitochondrial biogenesis. In this study, we hypothesized that PGC-1α plays a role in brown fat differentiation of MSCs.
Immortalized human MSCs were infected with adenovirus carrying PGC-1α cDNA to create PGC-1α-expressing MSCs.
The genetic profiling of PGC-1α-expressing MSCs shows the significant increase of genes related to mitochondrial functions and lipid metabolism compared to that of MSCs. When expressed in MSCs, PGC-1α activates robust mitochondrial biogenesis and respiration. The increase of oxygen consumption and reactive oxygen species represents a cellular readout of increased activity of the respiratory chain. The expression of thermogenic markers, such as cytochrome C and complex II, was significantly increased in MSCs with treatment of adenovirus expressing PGC-1α. Moreover, PGC-1α markedly inhibited the osteogenesis of MSCs under osteogenic induction. During adipogenesis, PGC-1α-expressing MSCs showed a significant increase in brown fat markers and a decrease in white fat markers. Notably, PGC-1α knockdown inhibited adipocyte differentiation of MSCs.
In summary, our data reveal an important role of PGC-1α in promoting brown fat differentiation of MSCs, and provide a new therapeutic approach for the treatment of obesity.
Journal of atherosclerosis and thrombosis 08/2011; 18(11):966-80. · 2.69 Impact Factor
-
Kun-Ling Tsai,
Li-Hsin Chen,
Shih-Hwa Chiou,
Guang-Yuh Chiou, Yu-Chih Chen,
Hsiang-Yun Chou,
Liang-Kung Chen,
Hsiao-Yun Chen,
Tsan-Hung Chiu,
Chiou-Sheng Tsai,
Hsiu-Chung Ou,
Chung-Lan Kao
[show abstract]
[hide abstract]
ABSTRACT: The lectin-like oxidized low-density lipoprotein receptor (LOX-1) is one pivot receptor for oxidized low-density lipoprotein (oxLDL) in human endothelial cells. Co-enzyme Q10 (Co Q10) has been widely used in clinical intervention. However, the molecular mechanisms underlying its protective effects against oxidative stress in endothelial cells are still largely unknown. This study was designed to test the hypothesis that Co Q10 mitigates oxLDL-induced endothelial oxidative injuries via modulation of LOX-1-mediated reactive oxygen species (ROS) generation and explored the role of AMP-activated protein kinase (AMPK), a negative regulator of NADPH oxidase.
Human umbilical vein endothelial cells (HUVECs) were pretreated with Co Q10 and then incubated with oxLDL for 24 h. Co Q10 attenuated oxLDL-elicited LOX-1 expression and ROS generation by suppression of NADPH oxidase activation. Co Q10 rescued dephosphorylation of AMPK caused by oxLDL that in turn led to an activation of NADPH oxidase by PKC. The results were confirmed using AMPK siRNA. Moreover, oxLDL-suppressed Akt/eNOS and enhanced p38 phosphorylation, which in turn activated NF-κB pathway. These detrimental events were ameliorated by Co Q10.
These results provide new highlight onto the possible molecular mechanisms of how Q10 suppresses oxLDL-induced endothelial oxidative injuries by the modulation of LOX-1-mediated ROS generation via the AMPK/PKC/NADPH oxidase signaling pathway.
Molecular Nutrition & Food Research 08/2011; 55 Suppl 2:S227-40. · 4.30 Impact Factor
-
Kun-Ling Tsai,
Yi-Hsiang Huang,
Chung-Lan Kao,
De-Ming Yang,
Hsin-Chen Lee,
Hsiang-Yun Chou, Yu-Chih Chen,
Guang-Yuh Chiou,
Li-Hsin Chen,
Yi-Ping Yang,
Tsan-Hung Chiu,
Chiou-Sheng Tsai,
Hsiu-Chung Ou,
Shih-Hwa Chiou
[show abstract]
[hide abstract]
ABSTRACT: Atherosclerosis is a chronic inflammatory disease of the vessel wall associated with oxidized low-density lipoprotein (oxLDL)-induced apoptosis of endothelial cells. Coenzyme Q10 (CoQ10), a potent antioxidant and a critical intermediate of the electron transport chain, has been reported to inhibit LDL oxidation and thus the progression of atherosclerosis. However, its molecular mechanisms on endothelial cells remain still unclarified.
In this study, primary human umbilical vein endothelial cell cultures treated with oxLDL were used to explore the protective effects of CoQ10.
Our results showed that CoQ10 attenuated the oxLDL-induced generation of reactive oxygen species and improved the antioxidant capacity. CoQ10 also attenuated the oxLDL-mediated down-regulation of endothelial nitric oxide synthase (eNOS) and up-regulation of inducible nitric oxide synthase (iNOS). In addition, CoQ10 suppressed oxLDL-activated NF-κB and downstream inflammatory mediators, including expression of adhesion molecules, release of proinflammatory cytokines and the adherence of monocytic THP-1 cells. Moreover, CoQ10 attenuated oxLDL-altered proapoptotic responses. The inhibitor of eNOS (L-NIO 10 μM) and iNOS (1400W 10 μM) as well as NO enhancer (SNP 10 μM) were used to clean up the mechanism.
These results provide new insight into the possible molecular mechanisms by which CoQ10 protects against atherogenesis by NO-related pathways.
The Journal of nutritional biochemistry 06/2011; 23(5):458-68. · 4.29 Impact Factor
-
Yuh-Lih Chang,
Shih-Jen Chen,
Chung-Lan Kao,
Shih-Chieh Hung,
Dah-Ching Ding,
Cheng-Chia Yu,
Yi-Jen Chen,
Hung-Hai Ku,
Chin-Po Lin,
Kun-Hsiung Lee, Yu-Chih Chen,
Jhi-Joung Wang,
Chuan-Chih Hsu,
Liang-Kung Chen,
Hsin-Yang Li,
Shih-Hwa Chiou
[show abstract]
[hide abstract]
ABSTRACT: Parkinson's disease (PD) is a neurodegenerative disorder characterized by the degeneration of dopaminergic (DA) neurons in the midbrain. Induced pluripotent stem (iPS) cells have shown potential for differentiation and may become a resource of functional neurons for the treatment of PD. However, teratoma formation is a major concern for transplantation-based therapies. This study examined whether functional neurons could be efficiently generated from iPS cells using a five-step induction procedure combined with docosahexaenoic acid (DHA) treatment. We demonstrated that DHA, a ligand for the RXR/Nurr1 heterodimer, significantly activated expression of the Nurr1 gene and the Nurr1-related pathway in iPS cells. DHA treatment facilitated iPS differentiation into tyrosine hydroxylase (TH)-positive neurons in vitro and in vivo and functionally increased dopamine release in transplanted grafts in PD-like animals. Furthermore, DHA dramatically upregulated the endogenous expression levels of neuroprotective genes (Bcl-2, Bcl-xl, brain-derived neurotrophic factor, and glial cell-derived neurotrophic factor) and protected against 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-induced apoptosis in iPS-derived neuronal precursor cells. DHA-treated iPS cells significantly improved the behavior of 6-hydroxydopamine (6-OHDA)-treated PD-like rats compared to control or eicosapentaenoic acid-treated group. Importantly, the in vivo experiment suggests that DHA induces the differentiation of functional dopaminergic precursors and improves the abnormal behavior of 6-OHDA-treated PD-like rats by 4 months after transplantation. Furthermore, we found that DHA treatment in iPS cell-grafted rats significantly downregulated the mRNA expression of embryonic stem cell-specific genes (Oct-4 and c-Myc) in the graft and effectively blocked teratoma formation. Importantly, 3 Tesla-magnetic resonance imaging and ex vivo green fluorescence protein imaging revealed that no teratomas were present in transplanted grafts of DHA-treated iPS-derived DA neurons 4 months after implantation. Therefore, our data suggest that DHA plays a crucial role in iPS differentiation into functional DA neurons and that this approach could provide a novel therapeutic approach for PD treatment.
Cell Transplantation 06/2011; 21(1):313-32. · 5.13 Impact Factor
-
Yu-Chih Chen
[show abstract]
[hide abstract]
ABSTRACT: In today's rapidly changing healthcare environment, nursing administrators and managers must enhance their abilities to anticipate and manage change in order to minimize the impact of such on healthcare delivery systems. To maintain patient care quality, nursing leaders should be familiar with change trends and implement innovative strategies that improve the work environment for nurses. This paper describes current major challenges faced by nursing administrators and introduces the concept of change and related strategies and available change management tools. This paper used five core competencies proposed by the Institute of Medicine (IOM) to illustrate and share experiences of managing change in clinical settings.
Hu li za zhi The journal of nursing 06/2011; 58(3):21-6.
-
[show abstract]
[hide abstract]
ABSTRACT: CD133(+) cells in glioblastoma (GBM) display cancer stem cell-like properties and have been considered as the culprit of tumor recurrence, justifying exploration of potential therapeutic modalities targeting CD133(+) cancer stem-like cells (CSCs). For photothermolysis studies, GBM-CD133(+) and GBM-CD133(-) cells mixed with various ratios were challenged with single-walled carbon nanotubes (SWNTs) conjugated with CD133 monoclonal antibody (anti-CD133) and then irradiated with near-infrared laser light. Results show that GBM-CD133(+) cells were selectively targeted and eradicated, whereas GBM-CD133(-) cells remained viable. In addition, in vitro tumorigenic and self-renewal capability of GBM-CD133(+) treated with localized hyperthermia was significantly blocked. Furthermore, GBM-CD133(+) cells pretreated with anti-CD133-SWNTs and irradiated by near-infrared laser 2 days after xenotransplantation in nude mice did not exhibit sustainability of CSC features for tumor growth. Taken altogether, our studies demonstrated that anti-CD133-SWNTs have the potential to be utilized as a thermal-coupling agent to effectively target and destroy GBM CSCs in vitro and in vivo. FROM THE CLINICAL EDITOR: Glioblastoma remains one of the most notorious cancer from the standpoint of recurrence and overall resistance to therapy. CD133+ stem cells occur among GBM cells, and may be responsible for the huge recurrence risk. This paper discusses a targeted elimination method of these cells, which may enable more efficient therapy in an effort to minimize or prevent recurrence.
Nanomedicine: nanotechnology, biology, and medicine 02/2011; 7(1):69-79. · 5.44 Impact Factor
-
[show abstract]
[hide abstract]
ABSTRACT: Signal transducer and activator of transcription 3 (STAT3) signaling reportedly promotes tumor malignancy and recurrence in nonsmall cell lung cancer (NSCLC). It was demonstrated previously that the STAT3 pathway maintains the tumorigenicity and therapeutic resistance of malignant tumors as well as cancer stem cells (CSCs). The objective of the current study was to investigate the effect of the strong STAT3 inhibitor, cucurbitacin I, in prominin-1 (CD133)-positive lung cancer cells.
CD133-positive and CD133-negative NSCLC-derived cells were isolated from 7 patients with NSCLC. CD133-positive NSCLC cells that were treated with or without cucurbitacin I were evaluated for their expression of phosphorylated STAT3 (p-STAT3), tumorigenicity, stemness properties, and resistance to chemotherapeutic drugs and ionizing radiation.
Compared with parental or CD133-negative NSCLC cells, CD133-positive NSCLC cells had greater tumorigenicity, greater radioresistance, and higher expression of octamer-binding transcription factor 4 (Oct-4), Nanog homeobox, and sex-determining region Y, box 2 (Sox2) at high p-STAT3 levels. Cucurbitacin I treatment at 100 nM effectively abrogated STAT3 activation, tumorigenic capacity, sphere formation ability, radioresistance, and chemoresistance in CD133-positive NSCLC cells. Microarray data suggested that cucurbitacin I inhibited the stemness gene signature of CD133-positive NSCLC cells and facilitated the differentiation of CD133-positive NSCLC cells into CD133-negative NSCLC cells. It is noteworthy that 150 nM cucurbitacin I effectively blocked STAT3 signaling and downstream survival targets, such as B-cell chronic lymphocytic leukemia/lymphoma 2 (Bcl-2) and Bcl-2-like 1 (Bcl-xL) expression and induced apoptosis in CD133-positive NSCLC cells. Finally, xenotransplantation experiments revealed that cucurbitacin I plus radiotherapy or chemotherapeutic drugs significantly suppressed tumorigenesis and improved survival in NSCLC-CD133-positive-transplanted, immunocompromised mice.
Targeting STAT3 signaling in CD133-positive NSCLC cells with cucurbitacin I suppressed CSC-like properties and enhanced chemoradiotherapy response. The potential of cucurbitacin I should be verified further in future anti-CSC therapy.
Cancer 01/2011; 117(13):2970-85. · 4.77 Impact Factor
-
[show abstract]
[hide abstract]
ABSTRACT: Head and neck squamous cell carcinoma (HNSCC) is a prevalent cancer worldwide. Signal transducers and activators of transcription 3 (STAT3) signaling is reported to promote tumor malignancy and recurrence in HNSCC. Cucurbitacins, triterpenoid derivatives, are strong STAT3 inhibitors with anticancer properties. Recent studies have shown aldehyde dehydrogenase 1 (ALDH1) to be a marker of cancer stem cells (CSC) in HNSCC. The aim of this study was to investigate the therapeutic effect of cucurbitacin I in HNSCC-derived CSCs. Using immunohistochemical analysis, we firstly showed that CD44, ALDH1, and phosphorylated STAT3 (p-STAT3) were higher in high-grade HNSCCs, and that triple positivity for CD44/ALDH1/p-STAT3 indicated a worse prognosis for HNSCC patients. Secondly, CD44(+)ALDH1(+) cells isolated from seven HNSCC patients showed greater tumorigenicity, radioresistance, and high expression of stemness (Bmi-1/Oct-4/Nanog) and epithelial-mesenchymal-transitional (Snail/Twist) genes as p-STAT3 level increased. Furthermore, we found that cucurbitacin I (JSI-124) can effectively inhibit the expression of p-STAT3 and capacities for tumorigenicity, sphere formation, and radioresistance in HNSCC-CD44(+)ALDH1(+). Notably, 150 nmol/L cucurbitacin I effectively blocked STAT3 signaling and downstream survivin and Bcl-2 expression, and it induced apoptosis in HNSCC-CD44(+)ALDH1(+). Moreover, microarray data indicated that 100 nmol/L cucurbitacin I facilitated CD44(+)ALDH1(+) cells to differentiate into CD44⁻ALDH1⁻ and enhanced the radiosensitivity of HNSCC-CD44(+)ALDH1(+). Xenotransplant experiments revealed that cucurbitacin I combined with radiotherapy significantly suppressed tumorigenesis and lung metastasis and further improved the survival rate in HNSCC-CD44(+)ALDH1(+)-transplanted immunocompromised mice. Taken together, our data show that cucurbitacin I, STAT3 inhibitor, reduces radioresistant, distant-metastatic, and CSC-like properties of HNSCC-CD44(+)ALDH1(+) cells. The potential of cucurbitacin I as a radiosensitizer should be verified in future anti-CSC therapy.
Molecular Cancer Therapeutics 11/2010; 9(11):2879-92. · 5.23 Impact Factor
-
[show abstract]
[hide abstract]
ABSTRACT: Ageing, which all creatures must encounter, is a challenge to every living organism. In the human body, it is estimated that cell division and metabolism occurs exuberantly until about 25 years of age. Beyond this age, subsidiary products of metabolism and cell damage accumulate, and the phenotypes of ageing appear, causing disease formation. Among these age-related diseases, neurodegenerative diseases have drawn a lot of attention due to their irreversibility, lack of effective treatment, and accompanied social and economical burdens. In seeking to ameliorate ageing and age-related diseases, the search for anti-ageing drugs has been of much interest. Numerous studies have shown that the plant polyphenol, resveratrol (3,5,4'-trihydroxystilbene), extends the lifespan of several species, prevents age-related diseases, and possesses anti-inflammatory, and anti-cancer properties. The beneficial effects of resveratrol are believed to be associated with the activation of a longevity gene, SirT1. In this review, we discuss the pathogenesis of age-related neurodegenerative diseases including Alzheimer's disease, Parkinson's disease and cerebrovascular disease. The therapeutic potential of resveratrol, diet and the roles of stem cell therapy are discussed to provide a better understanding of the ageing mystery.
Ageing research reviews 11/2010; 9 Suppl 1:S36-46. · 5.62 Impact Factor
-
Yu-Chih Chen
[show abstract]
[hide abstract]
ABSTRACT: Core competency is vital to the nursing profession. Such helps guarantee the high quality and effectiveness of delivered care and maintains the social value and status of the nursing profession. This article introduces the definition of nursing core competency and its connotations. The core competency profile for the nursing profession embraces basic behavioral attributes as well as mastery of advanced practice skills. The former include such attributes as gentleness, willingness to serve, keen observation and judgment, efficiency, skillfulness, responsibility and accountability. The latter embraces skills in general care, communication and collaboration, management, self-development, innovation and research, and stress-adjustment. To cultivate competent nurses, academic education should emphasize critical thinking skills, integrate problem-based and evidence-based learning approaches into curricula, and use objective structured clinical examination to evaluate learning outcomes. In the healthcare sector, systematic professional training models such as the clinical ladder with multidiscipline rotation hold the potential to train novice nurses as expert professionals. Meanwhile, to advance the professional capabilities of nurses, nursing administrators should provide a positive work environment to fuel and maintain learning motivation. Education and healthcare systems should work closely together to promote the professional competence of nurses and to strengthen the value of the nursing profession.
Hu li za zhi The journal of nursing 10/2010; 57(5):12-7.
-
[show abstract]
[hide abstract]
ABSTRACT: Silencing information regulator (SirT1), a NAD-dependent histone deacetylase, is an essential mediator of longevity in normal cells by calorie restriction. SirT1 has many biological functions, including transcription regulation, cell differentiation inhibition, cell cycle regulation, and anti-apoptosis. Resveratrol (RV)-induced SirT1 activation also improves endothelial dysfunction and suppresses vascular inflammation. In this study, we investigated the roles of RV-induced SirT1 activation in endothelial cells under oxidative stress.
SirT1 mRNA expression levels were examined in the endothelium layer (endothelial cells) of cardiac coronary vessels from patients receiving coronary artery bypass graft surgery (CABG) surgery and aged rats using reverse transcriptase polymerase chain reaction (RT-PCR). To further explore the effect of SirT1 activation on oxidative stress-induced aging, senescence-associated β-galactosidase (SA-β-gal) expression in RV-treated human umbilical vein endothelial cells (HUVECs) with or without H(2)O(2) treatment was evaluated.
SirT1 expression was decreased in aged and atherosclerotic vessels in vivo, and significantly reduced in endothelial cells purified from vessel tissues. Furthermore, SirT1 levels were dose-dependently increased in RV-treated HUVECs. The SA-β gal assay showed that RV inhibited the senescent phenotype of H(2)O(2)-treated HUVECs. Reactive oxygen species (ROS) production and the percentage of cells positive for SA-β gal were significantly increased in siRNA-SirT1 (knockdown of SirT1 expression)-treated HUVEC cells. Importantly, the treatment effect of RV was significantly abolished in the oxidative effects of H(2)O(2)-treated HUVECs by siRNA-SirT1.
Our data suggested that SirT1 could be a crucial factor involved in the endothelial cells of atherosclerotic CAGB patients and aging rats. RV is a potential candidate for preventing oxidative stress-induced aging in endothelial cells. RV may also prevent ROS-induced damage via increased endothelial SirT1 expression.
Journal of atherosclerosis and thrombosis 09/2010; 17(9):970-9. · 2.69 Impact Factor
-
[show abstract]
[hide abstract]
ABSTRACT: This study used purposive sampling through semi-structured interviews to obtain the experiences of mothers of 7-11-year-old children with asthma who were assisting their child's adaptation to school life.
Children with asthma often have problems with social adaptation, including school absenteeism, limits to their activity and bullying by peers. From kindergarten to elementary school, it is a transitional process where the child experiences multiple changes in the body, mind and social situations. It can be difficult for mothers of children with asthma to assist their children with their adaptation to school life.
A qualitative enquiry design was used.
A total of 15 mothers having elementary school children with asthma in grades 1-3 were interviewed. Participants were contacted at the outpatient department of a medical centre in Taiwan. Verbatim transcriptions of the interviews were examined by the content analysis method. After analysis of the interview data of the 15 informants, no new themes had emerged. Lincoln and Guba's trustworthiness criteria were employed to evaluate methodological rigour.
There were four themes that formed part of the mothers' experiences. Those were: (1) being concerned about the child's adaptation to school life, (2) improving attitudes and relieving symptoms, (3) establishing the child's self-management abilities and (4) bearing role strain and normalising the life of the child.
The findings of this study should help health professionals and schoolteachers to understand the needs of families and mothers who have a child with asthma. The findings provide appropriate information and resources to assist the children's adjustment to school life.
The findings indicate that nursing professionals should provide child-focused and family-centred care that will assist parents of children with asthma to adjust to school life.
Journal of Clinical Nursing 07/2010; 19(13-14):1960-8. · 1.12 Impact Factor
-
Shih-Jen Chen,
Chia-Ming Chang,
Shen-Kou Tsai,
Yuh-Lih Chang,
Shih-Jie Chou,
Shiang-Suo Huang,
Lung-Kuo Tai, Yu-Chih Chen,
Hung-Hai Ku,
Hsin-Yang Li,
Shih-Hwa Chiou
[show abstract]
[hide abstract]
ABSTRACT: Ischemic stroke is the leading cause of disability in the world. Cell transplantation has emerged in various neurological diseases as a potential therapeutic approach in the postacute stroke phase. Recently, inducible pluripotent stem (iPS) cells showed potential for multilineage differentiation and provide a resource for stem cell-based therapies. However, whether iPS transplantation could improve the function of stroke-like model is still an open question. The aim of this study is to investigate the therapeutic effects of subdural transplantation of iPS mixed with fibrin glue (iPS-FG) on cerebral ischemic rats induced by middle cerebral artery occlusion (MCAO). We demonstrated an efficient method to differentiate iPS into astroglial-like and neuron-like cells which display functional electrophysiological properties. In vivo study firstly showed that the direct injection of iPS into damaged areas of rat cortex significantly decreased the infarct size and improved the motor function in rats with MCAO. Furthermore, we found that the subdural iPS-FG can also effectively reduce the total infarct volume and greatly improve the behavior of rats with MCAO to perform rotarod and grasping tasks. Importantly, analysis of cytokine expression in iPS-FG-treated ischemic brains revealed a significant reduction of pro-inflammatory cytokines and an increase of anti-inflammatory cytokines. Taken together, these results suggest that iPS cells could improve the motor function, reduce infarct size, attenuate inflammation cytokines, and mediate neuroprotection after ischemic stroke. Subdural iPS-FG could be considered as a more safe approach because this method can avoid iatrogenic injury to brain parenchyma and enhance recovering from stoke-induced impairment.
Stem cells and development 03/2010; 19(11):1757-67. · 4.15 Impact Factor
-
Yu-Chih Chen,
Charn-Jung Chang,
Han-Shui Hsu,
Yi-Wei Chen,
Lung-Kuo Tai,
Ling-Ming Tseng,
Guang-Yuh Chiou,
Shih-Ching Chang,
Shou-Yen Kao,
Shih-Hwa Chiou,
Wen-Liang Lo
[show abstract]
[hide abstract]
ABSTRACT: Bmi-1, a member of the Polycomb family of transcriptional repressors, is essential for maintaining the self-renewal abilities of adult stem cells. Bmi-1 has been demonstrated to play a role in tumorigenesis in head and neck squamous cell carcinomas (HNSCCs). A recent study has further suggested that ALDH1 may be considered to be a putative marker for HNSCC-derived cancer stem cells. However, the role that Bmi-1 plays in HNSCC-derived ALDH1-positive cells (HNSCC-ALDH1(+)) has yet to be determined. In this study, we demonstrated that HNSCC-ALDH1(+) cells possess tumor initiating properties, are capable of self-renewal, and express higher levels of Bmi-1 as compared to HNSCC-ALDH1(-) cells. To further explore the functional role of Bmi-1 in HNSCC-ALDH1(+) cells, we used a lentiviral vector expressing shRNA to knock down Bmi-1 expression (sh-Bmi-1) in HNSCC-ALDH1(+) cells. Silencing of Bmi-1 significantly enhanced the sensitivity of HNSCC-ALDH1(+) cells to chemoradiation and increased the degree of chemoradiation-mediated apoptosis that occurred. Importantly, knockdown of Bmi-1 increased the effectiveness of radiotherapy and led to the inhibition of tumor growth in nude mice transplanted with HNSCC-ALDH1(+) cells. Kaplan-Meier survival analysis indicated that the mean survival rate of HNSCC-ALDH1(+) tumor-bearing immunocompromised mice treated with radiotherapy was significantly improved by treatment with sh-Bmi-1 as well. In summary, these results suggest that Bmi-1 is a potential target for increasing the sensitivity of HNSCC cancer stem cells to chemoradiotherapy.
Oral Oncology 03/2010; 46(3):158-65. · 2.86 Impact Factor
