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Article ; Online: Anti-apoptotic and autophagic effect

Yu-Fan Chang / Yung-Hsin Cheng / Yu-Chieh Ko / Shih-Hwa Chiou / Catherine Jui-Ling Liu

Regenerative Therapy, Vol 22, Iss , Pp 50-

Using conditioned medium from human bone marrow mesenchymal stem cells to treat human trabecular meshwork cells

2023 Volume 58

Abstract: Introduction: Glaucoma is a vision-threatening disease associated with accelerated aging of trabecular meshwork (TM) which results in elevated intraocular pressure (IOP). Increased oxidative stress in TM plays an important role in cellular molecular ... ...

Abstract	Introduction: Glaucoma is a vision-threatening disease associated with accelerated aging of trabecular meshwork (TM) which results in elevated intraocular pressure (IOP). Increased oxidative stress in TM plays an important role in cellular molecular damage which leads to senescence. Autophagy is an intracellular lysosomal degradation process which is activated when cells are under stressful condition, and emerging studies have demonstrated increased expression of modulators of apoptosis and expression of autophagic cascade in ex-vivo TM specimens or cultured TM cells under oxidative stress. Recently, studies have shown neuroprotective and IOP-lowering effects after transplanting mesenchymal stem cells (MSCs) or injecting condition medium (CM) of MSCs into ocular hypertension animal models. However, knowledge of the underlying mechanism accounting for these effects is limited. Using condition medium (CM) from human bone marrow-derived mesenchymal stem cells (BM-MSCs), we investigated the effects of the CM derived from BM-MSCs on TM autophagy and apoptosis. Methods: H2O2 was added to culture medium of human TM cells to mimic oxidative damage in glaucomatous eyes, and the autophagic and anti-apoptotic effects of BM-MSCs-derived CM was explored on the oxidatively damaged cells. Mitochondrial ROS production was examined by MitoSOX™, apoptosis was evaluated using terminal deoxynucleotidyl transferase (dUTP) nick end labeling (TUNEL) staining, and the expression of proteins involved in autophagy as well as extracellular matrix was investigated via Western blot. Results: There were no significant differences in TM cell viability when the cells were treated with different concentrations of CM in the absence of oxidative stress. Cell viability was significantly higher in oxidatively damaged TM cells treated with 1X or 5X CM compared to untreated TM cells under oxidative stress. The mitochondrial ROS level significantly increased with oxidative stress, which was mitigated in the CM treatment groups. DNA fragmentation ...
Keywords	Mesenchymal stem cell ; Apoptosis ; Autophagy ; Trabecular meshwork cell ; Medicine (General) ; R5-920 ; Cytology ; QH573-671
Subject code	610
Language	English
Publishing date	2023-03-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Aqueous Lumican Correlates with Central Retinal Thickness in Patients with Idiopathic Epiretinal Membrane

Wei-Cheng Chang / Cho-Hao Lee / Shih-Hwa Chiou / Chen-Chung Liao / Chao-Wen Cheng

Disease Markers, Vol

A Proteome Study

2022 Volume 2022

Abstract: Idiopathic epiretinal membrane (iERM) is a pathological fibrocellular change in the vitreoretinal junction over the macular area; however, possible pathogenic mechanisms remain unclear. Changes in the differential protein composition of the aqueous humor ...

Abstract	Idiopathic epiretinal membrane (iERM) is a pathological fibrocellular change in the vitreoretinal junction over the macular area; however, possible pathogenic mechanisms remain unclear. Changes in the differential protein composition of the aqueous humor (AH) may represent potential molecular changes associated with iERM. To gain new insights into the molecular mechanisms of iERM pathology, a sensitive label-free proteomics analysis was performed to compare AH protein expressions in patients with cataracts with or without iERM. This study employed nanoflow ultra-high-performance liquid chromatography-tandem mass spectrometry to investigate protein compositions of the AH obtained from individual human cataract eyes from 10 patients with iERM and 10 age-matched controls without iERM. Eight proteins were differentially expressed between the iERM and control samples, among which six proteins were upregulated and two were downregulated. A gene ontology (GO) analysis revealed that iERM was closely associated with several biological processes, such as immunity interactions, cell proliferation, and extracellular matrix remodeling. Additionally, multiple proteins, including lumican, cyclin-dependent kinase 13, and collagen alpha-3(VI) chain, were correlated with the central retinal thickness, indicating a multifactorial response in the pathogenic process of iERM. Changes in the AH level of lumican between iERM and control samples were also confirmed by an enzyme-linked immunosorbent assay. In conclusion, several pathological pathways involved in iERM were identified in the AH by a proteomic analysis, including immune reactions, cell proliferation, and remodeling of the extracellular matrix. Lumican is a potential aqueous biomarker for predicting iERM development and monitoring its progression. More clinical parameters also need to be identified to complete the analysis, and those could provide additional targets for treating and preventing iERM.
Keywords	Medicine (General) ; R5-920
Subject code	610
Language	English
Publishing date	2022-01-01T00:00:00Z
Publisher	Hindawi Limited
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Generation of human induced pluripotent stem cells from cystic fibrosis patient carrying nonsense mutation (p.S308X) in CFTR gene

Winnie Khor / Tzyh-Chang Hwang / Chih-Chien Wang / Aliaksandr A. Yarmishyn / Jiunn-Tyng Yeh / Shih-Hwa Chiou / Shih-Jie Chou

Stem Cell Research, Vol 60, Iss , Pp 102683- (2022)

2022

Abstract: Cystic fibrosis (CF) is a genetic disease affects CFTR channel synthesis. While 90 percent of the CF patients now benefit from small molecule target therapies, this treatment has yet to extend to those bearing nonsense mutations. Studies of these rare ... ...

Abstract	Cystic fibrosis (CF) is a genetic disease affects CFTR channel synthesis. While 90 percent of the CF patients now benefit from small molecule target therapies, this treatment has yet to extend to those bearing nonsense mutations. Studies of these rare mutations using cell lines with native pathological signatures of the disease may lead to breakthroughs in therapeutic development. Here, we report the generation of CF patient-derived induced pluripotent stem cells (iPSCs) carrying a nonsense mutation at position 308 (S308X). The pluripotency and genomic profile of the iPSC line was validated as a resource that can enable future research for CF.
Keywords	Biology (General) ; QH301-705.5
Language	English
Publishing date	2022-04-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Development of topical chitosan/ β-glycerophosphate-based hydrogel loaded with levofloxacin in the treatment of keratitis

Yu-Fan Chang / Yung-Hsin Cheng / Yu-Chieh Ko / Shih-Hwa Chiou / Catherine Jui-Ling Liu

Heliyon, Vol 8, Iss 1, Pp e08697- (2022)

An ex-vivo study

2022

Abstract: Staphylococcus species are responsible for most cases of post-operative endophthalmitis. Topical ocular drug was applied for post-operative infection prevention, but the way of delivery encounters many challenges in terms of patient's compliance, drug ... ...

Abstract	Staphylococcus species are responsible for most cases of post-operative endophthalmitis. Topical ocular drug was applied for post-operative infection prevention, but the way of delivery encounters many challenges in terms of patient's compliance, drug efficacy, and drug penetration. We used the levofloxacin-loaded chitosan/gelatin/β-glycerophosphate hydrogel sustained releasing system with good in vitro anti-bacterial efficacy and biocompatibility, which we had previously designed, for ex vivo keratitis model to test the preclinical drug efficacy and to determine drug level in the anterior chamber of the eye. The result showed that the ex-vivo corneal keratitis model with S. aureus infection revealed mild opacity over the central cornea with stromal infiltrate, but without obvious stromal infiltration post levofloxacin-loaded hydrogel treatment after 24 h of infection. Quantification of viable bacteria showed a significant anti-bacterial activity. The histological evidence also showed no visible S. aureus after levofloxacin-loaded hydrogel treatment, with a significant anti-inflammatory effect. We also examined the drug concentration in the aqueous humor 24 h after instilling one drop of the levofloxacin-loaded hydrogel. The concentration achieved to a desired drug level. These results suggested that by the ex-vivo model, levofloxacin-loaded hydrogel can be applied for treatment in post-operative endophthalmitis or keratitis after the ophthalmic surgery.
Keywords	Levofloxacin ; Chitosan/ β-glycerophosphate-based hydrogel ; Ex-vivo corneal keratitis model ; Science (General) ; Q1-390 ; Social sciences (General) ; H1-99
Subject code	500
Language	English
Publishing date	2022-01-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Proteomic Analysis of Aqueous Humor Proteins in Association with Cataract Risks

Wei-Cheng Chang / Cho-Hao Lee / Shih-Hwa Chiou / Chen-Chung Liao / Chao-Wen Cheng

Journal of Clinical Medicine, Vol 10, Iss 5731, p

Diabetes and Smoking

2021 Volume 5731

Abstract: Cataracts are one of the most common eye diseases that can cause blindness. Discovering susceptibility factors in the proteome that contribute to cataract development would be helpful in gaining new insights in the molecular mechanisms of the cataract ... ...

Abstract	Cataracts are one of the most common eye diseases that can cause blindness. Discovering susceptibility factors in the proteome that contribute to cataract development would be helpful in gaining new insights in the molecular mechanisms of the cataract process. We used label-free nanoflow ultra-high-performance liquid chromatography–tandem mass spectrometry to compare aqueous humor protein expressions in cataract patients with different cataract risk factors such as diabetes mellitus (DM) and smoking and in controls (with cataract) without risk exposure. Eight patients with diabetes and who smoked (with double risk factors), five patients with diabetes and five patients who smoked (both with a single risk factor), and nine aged-matched cataract controls patients (non-risk exposure) were enrolled. In total, 136 aqueous humor proteins were identified, of which only alpha-2-Heremans–Schmid (HS)-glycoprotein was considered to be significantly risk-associated because it was differentially expressed in these three groups and exhibited increased expression with increasing risk factors. Significant changes in the aqueous humor level of alpha-2-HS-glycoprotein between DM and control samples and between smoking and control samples were confirmed using ELISA. The alpha-2-HS-glycoprotein, called fetuin-a, could be a potential aqueous biomarker associated with DM and smoking, which were cataract risk factors.
Keywords	aqueous humor ; label free ; cataract ; risk factor ; proteomics ; alpha-2-HS-glycoprotein ; Medicine ; R
Subject code	610
Language	English
Publishing date	2021-12-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Circular RNA hsa_circ_0000190 Facilitates the Tumorigenesis and Immune Evasion by Upregulating the Expression of Soluble PD-L1 in Non-Small-Cell Lung Cancer

Yung-Hung Luo / Yi-Ping Yang / Chian-Shiu Chien / Aliaksandr A. Yarmishyn / Afeez Adekunle Ishola / Yueh Chien / Yuh-Min Chen / Ping-Hsing Tsai / Tzu-Wei Lin / Mong-Lien Wang / Shih-Hwa Chiou

International Journal of Molecular Sciences, Vol 23, Iss 64, p

2022 Volume 64

Abstract: Lung cancer is the leading cause of death from cancer in Taiwan and throughout the world. Immunotherapy has revealed promising and significant efficacy in NSCLC, through immune checkpoint inhibition by blocking programmed cell death protein (PD)-1/PD-1 ... ...

Abstract	Lung cancer is the leading cause of death from cancer in Taiwan and throughout the world. Immunotherapy has revealed promising and significant efficacy in NSCLC, through immune checkpoint inhibition by blocking programmed cell death protein (PD)-1/PD-1 ligand (PD-L1) signaling pathway to restore patients’ T-cell immunity. One novel type of long, non-coding RNAs, circular RNAs (circRNAs), are endogenous, stable, and widely expressed in tissues, saliva, blood, urine, and exosomes. Our previous results revealed that the plasma level of hsa_circ_0000190 can be monitored by liquid-biopsy-based droplet digital PCR and may serve as a valuable blood-based biomarker to monitor the disease progression and the efficacy of immunotherapy. In this study, hsa_circ_0000190 was shown to increase the PD-L1 mRNA-mediated soluble PD-L1 (sPD-L1) expression, consequently interfering with the efficacy of anti-PD-L1 antibody and T-cell activation, which may result in immunotherapy resistance and poor outcome. Our results unraveled that hsa_circ_0000190 facilitated the tumorigenesis and immune evasion of NSCLC by upregulating sPD-L1 expression, potentially developing a different aspect in elucidating the molecular immunopathogenesis of NSCLC. Hsa_circ_0000190 upregulation can be an effective indicator for the progression of NSCLC, and hsa_circ_0000190 downregulation may possess a potential therapeutic value for the treatment of NSCLC in combination with immunotherapy.
Keywords	lung cancer ; circular RNA ; immune checkpoints ; immune evasion ; programmed death-ligand 1 ; Biology (General) ; QH301-705.5 ; Chemistry ; QD1-999
Subject code	610
Language	English
Publishing date	2022-12-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Automatic Segmentation of Retinal Fluid and Photoreceptor Layer from Optical Coherence Tomography Images of Diabetic Macular Edema Patients Using Deep Learning and Associations with Visual Acuity

Huan-Yu Hsu / Yu-Bai Chou / Ying-Chun Jheng / Zih-Kai Kao / Hsin-Yi Huang / Hung-Ruei Chen / De-Kuang Hwang / Shih-Jen Chen / Shih-Hwa Chiou / Yu-Te Wu

Biomedicines, Vol 10, Iss 1269, p

2022 Volume 1269

Abstract: Diabetic macular edema (DME) is a highly common cause of vision loss in patients with diabetes. Optical coherence tomography (OCT) is crucial in classifying DME and tracking the results of DME treatment. The presence of intraretinal cystoid fluid (IRC) ... ...

Abstract	Diabetic macular edema (DME) is a highly common cause of vision loss in patients with diabetes. Optical coherence tomography (OCT) is crucial in classifying DME and tracking the results of DME treatment. The presence of intraretinal cystoid fluid (IRC) and subretinal fluid (SRF) and the disruption of the ellipsoid zone (EZ), which is part of the photoreceptor layer, are three crucial factors affecting the best corrected visual acuity (BCVA). However, the manual segmentation of retinal fluid and the EZ from retinal OCT images is laborious and time-consuming. Current methods focus only on the segmentation of retinal features, lacking a correlation with visual acuity. Therefore, we proposed a modified U-net, a deep learning algorithm, to segment these features from OCT images of patients with DME. We also correlated these features with visual acuity. The IRC, SRF, and EZ of the OCT retinal images were manually labeled and checked by doctors. We trained the modified U-net model on these labeled images. Our model achieved Sørensen–Dice coefficients of 0.80 and 0.89 for IRC and SRF, respectively. The area under the receiver operating characteristic curve (ROC) for EZ disruption was 0.88. Linear regression indicated that EZ disruption was the factor most strongly correlated with BCVA. This finding agrees with that of previous studies on OCT images. Thus, we demonstrate that our segmentation network can be feasibly applied to OCT image segmentation and assist physicians in assessing the severity of the disease.
Keywords	optical coherence tomography segmentation ; deep learning ; diabetic macular edema ; visual acuity ; Biology (General) ; QH301-705.5
Language	English
Publishing date	2022-05-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: State-of-the-Art Molecular Oncology of Lung Cancer in Taiwan

Yung-Hung Luo / Kung-Hao Liang / Hsu-Ching Huang / Chia-I Shen / Chi-Lu Chiang / Mong-Lien Wang / Shih-Hwa Chiou / Yuh-Min Chen

International Journal of Molecular Sciences, Vol 23, Iss 7037, p

2022 Volume 7037

Abstract: Lung cancers are life-threatening malignancies that cause great healthcare burdens in Taiwan and worldwide. The 5-year survival rate for Taiwanese patients with lung cancer is approximately 29%, an unsatisfactorily low number that remains to be improved. ...

Abstract	Lung cancers are life-threatening malignancies that cause great healthcare burdens in Taiwan and worldwide. The 5-year survival rate for Taiwanese patients with lung cancer is approximately 29%, an unsatisfactorily low number that remains to be improved. We first reviewed the molecular epidemiology derived from a deep proteogenomic resource in Taiwan. The nuclear factor erythroid 2-related factor 2 (NRF2)antioxidant mechanism was discovered to mediate the oncogenesis and tumor progression of lung adenocarcinoma. Additionally, DNA replication, glycolysis and stress response are positively associated with tumor stages, while cell-to-cell communication, signaling, integrin, G protein coupled receptors, ion channels and adaptive immunity are negatively associated with tumor stages. Three patient subgroups were discovered based on the clustering analysis of protein abundance in tumors. The first subgroup is associated with more advanced cancer stages and visceral pleural invasion, as well as higher mutation burdens. The second subgroup is associated with EGFR L858R mutations. The third subgroup is associated with PI3K/AKT pathways and cell cycles. Both EGFR and PI3K/AKT signaling pathways have been shown to induce NRF2 activation and tumor cell proliferation. We also reviewed the clinical evidence of patient outcomes in Taiwan given various approved targeted therapies, such as EGFR-tyrosine kinase inhibitors and anaplastic lymphoma kinase (ALK)inhibitors, in accordance with the patients’ characteristics. Somatic mutations occurred in EGFR, KRAS, HER2 and BRAF genes, and these mutations have been detected in 55.7%, 5.2%, 2.0% and 0.7% patients, respectively. The EGFR mutation is the most prevalent targetable mutation in Taiwan. EML4-ALK translocations have been found in 9.8% of patients with wild-type EGFR . The molecular profiling of advanced NSCLC is critical to optimal therapeutic decision-making. The patient characteristics, such as mutation profiles, protein expression profiles, drug-resistance profiles, ...
Keywords	Taiwan ; lung cancer ; precision medicine ; proteogenomics ; targeted therapy ; NRF2 ; Biology (General) ; QH301-705.5 ; Chemistry ; QD1-999
Subject code	616
Language	English
Publishing date	2022-06-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Maintenance of the stemness in CD44+ HCT-15 and HCT-116 human colon cancer cells requires miR-203 suppression

Sy-Yeuan Ju / Shih-Hwa Chiou / Yeu Su

Stem Cell Research, Vol 12, Iss 1, Pp 86-

2014 Volume 100

Abstract: The purpose of this study was to isolate cancer stem cells (CSCs, also called tumor-initiating cells, TICs) from established human colorectal carcinoma (CRC) cell lines, characterize them extensively and dissect the mechanism for their stemness. Freshly ... ...

Abstract	The purpose of this study was to isolate cancer stem cells (CSCs, also called tumor-initiating cells, TICs) from established human colorectal carcinoma (CRC) cell lines, characterize them extensively and dissect the mechanism for their stemness. Freshly isolated CD44+ and CD44− cells from the HCT-15 human colon cancer cell line were subjected to various analyses. Interestingly, CD44+ cells exhibited higher soft agar colony-forming ability and in vivo tumorigenicity than CD44− cells. In addition, the significant upregulation of the protein Snail and the downregulation of miR-203, a stemness inhibitor, in CD44+ cells suggested that this population possessed higher invasion/metastasis and differentiation potential than CD44− cells. By manipulating the expression of CD44 in HCT-15 and HCT-116 cells, we found that the levels of several EMT activators and miR-203 were positively and negatively correlated with those of CD44, respectively. Further analyses revealed that miR-203 levels were repressed by Snail, which was shown to bind to specific E-box(es) present in the miR-203 promoter. In agreement, silencing miR-203 expression in wild-type HCT-116 human colon cancer cells also resulted in an increase of their stemness. Finally, we discovered that c-Src kinase activity was required for the downregulation of miR-203 in HCT-15 cells, which was stimulated by the interaction between hyaluronan (HA) and CD44. Taken together, CD44 is a critical molecule for modulating stemness in CSCs. More importantly, we show for the first time that the downregulation of miR-203 by HA/CD44 signaling is the main reason for stemness-maintenance in colon cancer cells.
Keywords	Biology (General) ; QH301-705.5
Subject code	610
Language	English
Publishing date	2014-01-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Effect of cold provocation on vessel density in eyes with primary open angle glaucoma

Wei-Yi Chou / Catherine Jui-Ling Liu / Mei-Ju Chen / Shih-Hwa Chiou / Wei-Ta Chen / Yu-Chieh Ko

Scientific Reports, Vol 9, Iss 1, Pp 1-

An optical coherence tomography angiography study

2019 Volume 8

Abstract: Abstract The cold pressor test (CPT) induces a cardiovascular response, which may affect ocular blood flow and neuronal function. This study assessed whether optical coherence tomography angiography (OCT-A) can be used to evaluate CPT-induced changes in ... ...

Abstract	Abstract The cold pressor test (CPT) induces a cardiovascular response, which may affect ocular blood flow and neuronal function. This study assessed whether optical coherence tomography angiography (OCT-A) can be used to evaluate CPT-induced changes in healthy eyes and in eyes with primary open-angle glaucoma (POAG). Twenty-two healthy subjects and 23 subjects with POAG and retinal fibre layer defects in only one hemifield were included in this study. The CPT was performed by submerging a subject’s hand in cold water (0–4 °C) for 1 minute. The results showed that baseline peripapillary and macular vessel density (VD) measurements were significantly lower in subjects with POAG than in controls (all P < 0.05). Post-CPT VD measurements did not significantly differ from baseline in either healthy or glaucomatous eyes. Additionally, CPT-induced changes in VD did not differ among normal eyes, damaged and undamaged glaucomatous hemifields. Changes in VD were also not significantly influenced by self-reported history of cold extremities. In conclusion, the CPT does not induce significant VD changes, as measured by OCT-A, in the peripapillary or macular areas of either healthy eyes or eyes with POAG. The VD, an all-or-nothing flow measure, may not be sensitive enough for evaluating cold-induced ocular haemodynamic changes.
Keywords	Medicine ; R ; Science ; Q
Subject code	150
Language	English
Publishing date	2019-06-01T00:00:00Z
Publisher	Nature Publishing Group
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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