1
|
Kuo YR, Lee YC, Wang CT, Liu WC, Ou CH, Lin KC, Cheng TH, Jan HC, Hu CY. Prognostic value of preoperative radiographic perinephric fat features in renal cell carcinoma patients undergoing surgery. Asian J Surg 2024; 47:2188-2194. [PMID: 38383186 DOI: 10.1016/j.asjsur.2024.02.048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 01/23/2024] [Accepted: 02/02/2024] [Indexed: 02/23/2024] Open
Abstract
BACKGROUND We aimed to assess the prognostic importance of perinephric fat features in images of patients with non-metastatic renal cell carcinoma (RCC) undergoing surgery. METHODS We enrolled RCC patients who underwent surgical treatment between 2011 and 2019. Two characteristics, including perinephric fat thickness and perinephric fat stranding, were evaluated using preoperative computed tomography or magnetic resonance images. The association between perinephric fat characteristics and disease progression was examined by Kaplan-Meier survival analysis and Cox regression model. RESULTS In a multivariate Cox proportional hazards model adjusting for tumor stage, intratumoral necrosis, and neutrophil-to-lymphocyte ratio, we found that patients in the thin perinephric fat group (<1 cm) had a poorer progression-free survival (PFS) compared to the thick perinephric fat group (≥1 cm) (HR 2.8; 95% CI 1.175-6.674, p = 0.02). Additionally, the fat stranding group had a poorer PFS than the non-stranding group (HR 3.852; 95% CI 1.082-13.704, p = 0.037). The non-stranding with thick perinephric fat group exhibits the highest cumulative PFS while the stranding with thin perinephric fat group has the lowest cumulative PFS. In receiver operating characteristic curve analysis, combing these two perinephric fat characteristics with tumor stage can achieve a better discriminatory power than tumor stage alone. CONCLUSIONS Our study indicates that the evaluation of image-based perinephric fat features is a simple, straightforward, reproducible tool for predicting RCC prognosis and may assist in preoperative risk stratification.
Collapse
Affiliation(s)
- Yuh-Ren Kuo
- Department of Urology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, 704, Taiwan, ROC
| | - Ya-Che Lee
- Department of Urology, Ditmanson Medical Foundation Chia-Yi Christian Hospital, Chiayi, 600, Taiwan, ROC
| | - Chung-Teng Wang
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, Tainan, 704, Taiwan, ROC
| | - Wan-Chen Liu
- Department of Medical Imaging, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, 704, Taiwan, ROC
| | - Chien-Hui Ou
- Department of Urology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, 704, Taiwan, ROC; Department of Urology, College of Medicine, National Cheng Kung University, Tainan, 704, Taiwan, ROC
| | - Kun-Che Lin
- Department of Urology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, 704, Taiwan, ROC
| | - Tsung-Han Cheng
- Department of Urology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, 704, Taiwan, ROC
| | - Hau-Chern Jan
- Department of Urology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, 704, Taiwan, ROC; Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, 704, Taiwan, ROC.
| | - Che-Yuan Hu
- Department of Urology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, 704, Taiwan, ROC; Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, 704, Taiwan, ROC.
| |
Collapse
|
2
|
Wang CT. [Current management of acute Stanford type A aortic dissection complicated with mesenteric malperfusion]. Zhonghua Yi Xue Za Zhi 2024; 104:566-570. [PMID: 38389235 DOI: 10.3760/cma.j.cn112137-20231016-00774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/24/2024]
Abstract
The management of acute type A aortic dissection (aTAAD) with mesenteric malperfusion (MMP) is quite challenging as it is often associated with high mortality and poor outcomes, and an optimal treatment strategy is lack of consensus for this critically ill condition. Emergent open surgical repair of the ascending aorta is a life-saving operation and remains the standard of care for aTAAD with MMP, but is associated with a high rate of mortality. In recent years, reperfusion of superior mesenteric artery (SMA) by endovascular repair as the first treatment strategy in the treatment of aTAAD with MMP has been concerned and reported. Only endovascular repair and conservative medical treatment are also introduced in few cases with poor outcomes. There are many urgent issues that need to be addressed in current strategies. The optimal management strategies remain controversial, and further investigation and research are needed. These issues were addressed in this article.
Collapse
Affiliation(s)
- C T Wang
- Department of Cardiothoracic Surgery, General Hospital of Eastern Theater Command, Nanjing 210002, China
| |
Collapse
|
3
|
Wu HT, Chiang CC, Wang CT, Chen YH, Hsu SY, Chen YC. Consumption of the nonnutritive sweetener acesulfame potassium increases central precocious puberty risk. Journal of Hazardous Materials 2024; 461:132529. [PMID: 37738850 DOI: 10.1016/j.jhazmat.2023.132529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Revised: 08/25/2023] [Accepted: 09/09/2023] [Indexed: 09/24/2023]
Abstract
The prevalence of precocious puberty and the consumption of nonnutritive sweeteners (NNS) is rapidly growing worldwide. However, the effects of NNSs on precocious puberty remain unclear. We examined the impact of acesulfame potassium (AceK), one of the most widely used NNS, on central precocious puberty (CPP) development using ex vivo and in vitro studies. 884 girls aged 6-12 were enrolled with complete AceK consumption data and CPP outcome assessment in the Taiwan Pubertal Longitudinal Study from 2018 to 2022. After adjustment for confounders, compared with no AceK consumption, AceK consumption at more than the median dose was associated with higher CPP risk in girls (odds ratio = 1.88, 95% confidence interval = 1.16-3.06; p for trend = 0.003). In rats, AceK consumption from in-utero to post-weaning stages accelerated puberty onset, accompanied by increased brain gonadotropin-releasing hormone (GnRH) expression. Intracerebroventricular AceK injection also induced early puberty onset in rats. In N44 hypothalamic neuron cells, AceK treatment increased reactive oxygen species production, which led to protein kinase A (PKA) activation and increased GnRH expression. These findings suggest that prepubertal girls should consume soft drinks or food products containing AceK more cautiously.
Collapse
Affiliation(s)
- Hung-Tsung Wu
- Department of Internal Medicine, School of Medicine, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan
| | - Chi-Chen Chiang
- Graduate Institute of Metabolism and Obesity Sciences, Taipei Medical University, Taipei 110, Taiwan
| | - Chung-Teng Wang
- Department of Internal Medicine, School of Medicine, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan
| | - Yue-Hwa Chen
- School of Nutrition and Health Sciences, Taipei Medical University, Taipei 110, Taiwan; School of Food Safety, Taipei Medical University, Taipei 110, Taiwan
| | - Shih-Yuan Hsu
- Department of Family Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei 110, Taiwan
| | - Yang-Ching Chen
- Graduate Institute of Metabolism and Obesity Sciences, Taipei Medical University, Taipei 110, Taiwan; School of Nutrition and Health Sciences, Taipei Medical University, Taipei 110, Taiwan; Department of Family Medicine, Taipei Medical University Hospital, Taipei 110, Taiwan; Department of Family Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei 110, Taiwan.
| |
Collapse
|
4
|
Liang YC, Cheng KP, Kuo HY, Wang CT, Chou HW, Huang KL, Wu HT, Ou HY. Calsarcin-2 May Play a Compensatory Role in the Development of Obese Sarcopenia. Biomedicines 2023; 11:2708. [PMID: 37893082 PMCID: PMC10604196 DOI: 10.3390/biomedicines11102708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 10/01/2023] [Accepted: 10/03/2023] [Indexed: 10/29/2023] Open
Abstract
Although obese sarcopenia is a major public health problem with increasing prevalence worldwide, the factors that contribute to the development of obese sarcopenia are still obscure. In order to clarify this issue, a high-fat-diet-induced obese sarcopenia mouse model was utilized. After being fed with a high-fat diet for 24 weeks, decreased motor functions and muscle mass ratios were found in the C57BL/6 mice. In addition, the expression of calsarcin-2 was significantly increased in their skeletal muscle, which was determined by a microarray analysis. In order to clarify the role of calsarcin-2 in muscle, lentiviral vectors containing the calsarcin-2 gene or short hairpin RNA targeted to calsarcin-2 were used to manipulate calsarcin-2 expressions in L6 myoblasts. We found that an overexpression of calsarcin-2 facilitated L6 myoblast differentiation, whereas a calsarcin-2 knockdown delayed myoblast differentiation, as determined by the expression of myogenin. However, the calsarcin-2 knockdown showed no significant effects on myoblast proliferation. In addition, to clarify the relationship between serum calsarcin-2 and sarcopenia, the bilateral gastrocnemius muscle mass per body weight in mice and appendicular skeletal muscle mass index in humans were measured. Although calsarcin-2 facilitated myoblast differentiation, the serum calsarcin-2 concentration was negatively related to skeletal muscle mass index in mice and human subjects. Taken together, calsarcin-2 might facilitate myoblast differentiation and appear to play a compensatory role in sarcopenia.
Collapse
Affiliation(s)
- Yu-Cheng Liang
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 704, Taiwan; (Y.-C.L.); (K.-P.C.); (H.-Y.K.); (H.-W.C.)
| | - Kai-Pi Cheng
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 704, Taiwan; (Y.-C.L.); (K.-P.C.); (H.-Y.K.); (H.-W.C.)
| | - Hsin-Yu Kuo
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 704, Taiwan; (Y.-C.L.); (K.-P.C.); (H.-Y.K.); (H.-W.C.)
| | - Chung-Teng Wang
- Department of Internal Medicine, School of Medicine, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan;
| | - Hsuan-Wen Chou
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 704, Taiwan; (Y.-C.L.); (K.-P.C.); (H.-Y.K.); (H.-W.C.)
| | - Kuan-Lin Huang
- Department of Biochemistry and Molecular Biology, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan;
| | - Hung-Tsung Wu
- Department of Internal Medicine, School of Medicine, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan;
| | - Horng-Yih Ou
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 704, Taiwan; (Y.-C.L.); (K.-P.C.); (H.-Y.K.); (H.-W.C.)
- Department of Internal Medicine, School of Medicine, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan;
- Department of Biochemistry and Molecular Biology, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan;
| |
Collapse
|
5
|
Hu CY, Hung CF, Chen PC, Hsu JY, Wang CT, Lai MD, Tsai YS, Shiau AL, Shieh GS, Wu CL. Oct4 and Hypoxia Dual-Regulated Oncolytic Adenovirus Armed with shRNA-Targeting Dendritic Cell Immunoreceptor Exerts Potent Antitumor Activity against Bladder Cancer. Biomedicines 2023; 11:2598. [PMID: 37892972 PMCID: PMC10604824 DOI: 10.3390/biomedicines11102598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 09/12/2023] [Accepted: 09/20/2023] [Indexed: 10/29/2023] Open
Abstract
Immunotherapy has emerged as a promising modality for cancer treatment. Dendritic cell immunoreceptor (DCIR), a C-type lectin receptor, is expressed mainly by dendritic cells (DCs) and mediates inhibitory intracellular signaling. Inhibition of DCIR activation may enhance antitumor activity. DCIR is encoded by CLEC4A in humans and by Clec4a2 in mice. Gene gun-mediated delivery of short hairpin RNA (shRNA) targeting Clec4a2 into mice bearing bladder tumors reduces DCIR expression in DCs, inhibiting tumor growth and inducing CD8+ T cell immune responses. Various oncolytic adenoviruses have been developed in clinical trials. Previously, we have developed Ad.LCY, an oncolytic adenovirus regulated by Oct4 and hypoxia, and demonstrated its antitumor efficacy. Here, we generated a Clec4a2 shRNA-expressing oncolytic adenovirus derived from Ad.LCY, designated Ad.shDCIR, aimed at inducing more robust antitumor immune responses. Our results show that treatment with Ad.shDCIR reduced Clec4a expression in DCs in cell culture. Furthermore, Ad.shDCIR exerted cytolytic effects solely on MBT-2 bladder cancer cells but not on normal NIH 3T3 mouse fibroblasts, confirming the tumor selectivity of Ad.shDCIR. Compared to Ad.LCY, Ad.shDCIR induced higher cytotoxic T lymphocyte (CTL) activity in MBT-2 tumor-bearing immunocompetent mice. In addition, Ad.shDCIR and Ad.LCY exhibited similar antitumor effects on inhibiting tumor growth. Notably, Ad.shDCIR was superior to Ad.LCY in prolonging the survival of tumor-bearing mice. In conclusion, Ad.shDCIR may be further explored as a combination therapy of virotherapy and immunotherapy for bladder cancer and likely other types of cancer.
Collapse
Affiliation(s)
- Che-Yuan Hu
- Department of Urology, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan (Y.-S.T.)
| | - Chi-Feng Hung
- Department of Urology, Ditmanson Medical Foundation Chia-Yi Christian Hospital, Chiayi City 60002, Taiwan
| | - Pi-Che Chen
- Department of Urology, Ditmanson Medical Foundation Chia-Yi Christian Hospital, Chiayi City 60002, Taiwan
| | - Jia-Yu Hsu
- Department of Biochemistry and Molecular Biology, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan (M.-D.L.)
| | - Chung-Teng Wang
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan (A.-L.S.)
| | - Ming-Derg Lai
- Department of Biochemistry and Molecular Biology, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan (M.-D.L.)
| | - Yuh-Shyan Tsai
- Department of Urology, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan (Y.-S.T.)
| | - Ai-Li Shiau
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan (A.-L.S.)
- Ditmanson Medical Foundation Chia-Yi Christian Hospital, Chiayi City 60002, Taiwan
| | - Gia-Shing Shieh
- Department of Urology, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan (Y.-S.T.)
- Department of Urology, Tainan Hospital, Ministry of Health and Welfare, Executive Yuan, Tainan 70043, Taiwan
| | - Chao-Liang Wu
- Department of Biochemistry and Molecular Biology, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan (M.-D.L.)
- Ditmanson Medical Foundation Chia-Yi Christian Hospital, Chiayi City 60002, Taiwan
| |
Collapse
|
6
|
Wang CC, Lin CH, Chou HW, Wang CT, Liang YC, Wu HT, Ou HY. Compensatory Increase of Serum Hepassocin Protects Hyperthyroidism-Induced Hepatic Dysfunction. Biomedicines 2023; 11:1936. [PMID: 37509575 PMCID: PMC10377103 DOI: 10.3390/biomedicines11071936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 07/02/2023] [Accepted: 07/05/2023] [Indexed: 07/30/2023] Open
Abstract
Hepatic dysfunction is commonly observed in subjects with hyperthyroidism. Hepassocin is a hepatokine playing an important role in metabolic diseases and exhibiting a hepatic protective effect. Nevertheless, the relationship between hepassocin and hyperthyroidism was still unknown. In the present study, a total of 36 subjects with Graves' disease were enrolled, and we found that the alanine aminotransferase (ALT) levels were significantly decreased in parallel with the decrement in serum hepassocin concentrations at 6 months after standard treatment for hyperthyroidism. In addition, HepG2 cell line was used to investigate the role of hepassocin in hyperthyroidism-induced hepatic dysfunction. Treatment of hepassocin recombinant protein in HepG2 cells dose-dependently decreased triiodothyronine (T3)-induced ALT and aspartate aminotransferase (AST) elevation. Moreover, hepassocin significantly increased the expression of phosphoenolpyruvate carboxykinase (PEPCK) in a dose-dependent manner. Deletion of hepassocin in HepG2 cells reversed the effects of T3 on PEPCK expressions. Furthermore, we found that T3 increased the expression of hepassocin through a hepatocyte nuclear factor 1α-dependent pathway. Taken together, these results indicated a compensatory increase in serum hepassocin might have a protective role in hyperthyroidism-induced hepatic dysfunction.
Collapse
Affiliation(s)
- Chih-Chen Wang
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Ching-Han Lin
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Hsuan-Wen Chou
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Chung-Teng Wang
- Department of Internal Medicine, School of Medicine, College of Medicine, National Cheng Kung University, Tainan 70403, Taiwan
| | - Yu-Cheng Liang
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Hung-Tsung Wu
- Department of Internal Medicine, School of Medicine, College of Medicine, National Cheng Kung University, Tainan 70403, Taiwan
| | - Horng-Yih Ou
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
- Department of Internal Medicine, School of Medicine, College of Medicine, National Cheng Kung University, Tainan 70403, Taiwan
| |
Collapse
|
7
|
Wang CT, Zhou JL, Lin GL, Yin SY, Cong L, Zhang GN, An Y, Qiu XY. [Advances in three-dimensional tumor models for colorectal cancer]. Zhonghua Zhong Liu Za Zhi 2023; 45:464-470. [PMID: 37355464 DOI: 10.3760/cma.j.cn112152-20220928-00661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/26/2023]
Abstract
Conventional tumor culture models include two-dimensional tumor cell cultures and xenograft models. The former has disadvantages including lack of tumor heterogeneity and poor clinical relevance, while the latter are limited by the slow growth, low engraftment successful rate, and high cost. In recent years, in vitro three-dimensional (3D) tumor models have emerged as the tool to better recapitulate the spatial structure and the in vivo environment of tumors. In addition, they preserve the pathological and genetic features of tumor cells and reflect the complex intracellular and extracellular interactions of tumors, which have become a powerful tool for investigating the tumor mechanism, drug screening, and personalized cancer treatment. 3D tumor model technologies such as spheroids, organoids, and microfluidic devices are maturing. Application of new technologies such as co-culture, 3D bioprinting, and air-liquid interface has further improved the clinical relevance of the models. Some models recapitulate the tumor microenvironment, and some can even reconstitute endogenous immune components and microvasculature. In recent years, some scholars have combined xenograft models with organoid technology to develop matched in vivo/in vitro model biobanks, giving full play to the advantages of the two technologies, and providing an ideal research platform for individualized precision therapy for specific molecular targets in certain subtypes of tumors. So far, the above technologies have been widely applied in the field of colorectal cancer research. Our research team is currently studying upon the application of patient-derived tumor cell-like clusters, a self-assembly 3D tumor model, in guiding the selection of postoperative chemotherapy regimens for colorectal cancer. A high modeling success rate and satisfactory results in the drug screening experiments have been achieved. There is no doubt that with the advancement of related technologies, 3D tumor models will play an increasingly important role in the research and clinical practice of colorectal cancer.
Collapse
Affiliation(s)
- C T Wang
- Department of General Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - J L Zhou
- Department of General Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - G L Lin
- Department of General Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - S Y Yin
- State Key Laboratory of Natural and Biomimetic Drugs, Institute of Molecular Medicine, Department of Biomedical Engineering, College of Engineering, Peking University, Beijing 100080, China
| | - L Cong
- Department of General Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - G N Zhang
- Department of General Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Y An
- Department of General Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - X Y Qiu
- Department of General Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| |
Collapse
|
8
|
Tsai MJ, Li CH, Wu HT, Kuo HY, Wang CT, Pai HL, Chang CJ, Ou HY. Long-Term Consumption of Sucralose Induces Hepatic Insulin Resistance through an Extracellular Signal-Regulated Kinase 1/2-Dependent Pathway. Nutrients 2023; 15:2814. [PMID: 37375718 DOI: 10.3390/nu15122814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 06/16/2023] [Accepted: 06/19/2023] [Indexed: 06/29/2023] Open
Abstract
Sugar substitutes have been recommended to be used for weight and glycemic control. However, numerous studies indicate that consumption of artificial sweeteners exerts adverse effects on glycemic homeostasis. Although sucralose is among the most extensively utilized sweeteners in food products, the effects and detailed mechanisms of sucralose on insulin sensitivity remain ambiguous. In this study, we found that bolus administration of sucralose by oral gavage enhanced insulin secretion to decrease plasma glucose levels in mice. In addition, mice were randomly allocated into three groups, chow diet, high-fat diet (HFD), and HFD supplemented with sucralose (HFSUC), to investigate the effects of long-term consumption of sucralose on glucose homeostasis. In contrast to the effects of sucralose with bolus administration, the supplement of sucralose augmented HFD-induced insulin resistance and glucose intolerance, determined by glucose and insulin tolerance tests. In addition, we found that administration of extracellular signal-regulated kinase (ERK)-1/2 inhibitor reversed the effects of sucralose on glucose intolerance and insulin resistance in mice. Moreover, blockade of taste receptor type 1 member 3 (T1R3) by lactisole or pretreatment of endoplasmic reticulum stress inhibitors diminished sucralose-induced insulin resistance in HepG2 cells. Taken together, sucralose augmented HFD-induced insulin resistance in mice, and interrupted insulin signals through a T1R3-ERK1/2-dependent pathway in the liver.
Collapse
Affiliation(s)
- Meng-Jie Tsai
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70403, Taiwan
| | - Chung-Hao Li
- Department of Family Medicine, An Nan Hospital, China Medical University, Tainan 70965, Taiwan
- School of Medicine, College of Medicine, China Medical University, Taichung 40402, Taiwan
| | - Hung-Tsung Wu
- Department of Internal Medicine, School of Medicine, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Hsin-Yu Kuo
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70403, Taiwan
| | - Chung-Teng Wang
- Department of Internal Medicine, School of Medicine, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Hsiu-Ling Pai
- Graduated Institute of Metabolism and Obesity Science, College of Nutrition, Taipei Medical University, Taipei City 11031, Taiwan
| | - Chih-Jen Chang
- Department of Family Medicine, Ditmanson Medical Foundation Chia-Yi Christian Hospital, Chiayi City 60002, Taiwan
| | - Horng-Yih Ou
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70403, Taiwan
- Department of Internal Medicine, School of Medicine, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| |
Collapse
|
9
|
Chen SY, Chu CT, Yang ML, Lin JD, Wang CT, Lee CH, Lin IC, Shiau AL, Ling P, Wu CL. Amelioration of Murine Colitis by Attenuated Salmonella choleraesuis Encoding Interleukin-19. Microorganisms 2023; 11:1530. [PMID: 37375032 DOI: 10.3390/microorganisms11061530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 06/05/2023] [Accepted: 06/06/2023] [Indexed: 06/29/2023] Open
Abstract
The imbalance of mucosal immunity in the lower gastrointestinal tract can lead to chronic inflammatory bowel diseases (IBDs), including Crohn's disease and ulcerative colitis. IBD is a chronic inflammatory disorder that causes small and/or large intestines ulceration. According to previous studies, recombinant interleukin (IL)-10 protein and genetically modified bacteria secreting IL-10 ameliorate dextran sulfate sodium (DSS)-induced colitis in mice. IL-19 is a transcriptional activator of IL-10 and can alter the balance of T helper 1 (Th)1/Th2 cells in favor of Th2. In this study, we aimed to investigate whether the expression of the murine IL-19 gene carried by Salmonella choleraesuis (S. choleraesuis) could ameliorate murine IBD. Our results showed that the attenuated S. choleraesuis could carry and express the IL-19 gene-containing plasmid for IBD gene therapy by reducing the mortality and clinical signs in DSS-induced acute colitis mice as compared to the untreated ones. We also found that IL-10 expression was induced in IL-19-treated colitis mice and prevented inflammatory infiltrates and proinflammatory cytokine expression in these mice. We suggest that S. choleraesuis encoding IL-19 provides a new strategy for treating IBD in the future.
Collapse
Affiliation(s)
- Shih-Yao Chen
- Department of Nursing, College of Nursing, Chung Hwa University of Medical Technology, Tainan 71703, Taiwan
| | - Chun-Ting Chu
- Division of Colorectal Surgery, Department of Surgery, Ditmanson Medical Foundation Chia-Yi Christian Hospital, 539, Zhongxiao Road, Chiayi City 60002, Taiwan
| | - Mei-Lin Yang
- Ditmanson Medical Foundation Chia-Yi Christian Hospital, Chiayi City 60002, Taiwan
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Jian-Da Lin
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
- Department of Biochemical Science and Technology, College of Life Science, National Taiwan University, Taipei City 10617, Taiwan
| | - Chung-Teng Wang
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Che-Hsin Lee
- Department of Biological Sciences, National Sun Yat-sen University, Kaohsiung 80424, Taiwan
| | - I-Chen Lin
- Division of Colorectal Surgery, Department of Surgery, Ditmanson Medical Foundation Chia-Yi Christian Hospital, 539, Zhongxiao Road, Chiayi City 60002, Taiwan
| | - Ai-Li Shiau
- Ditmanson Medical Foundation Chia-Yi Christian Hospital, Chiayi City 60002, Taiwan
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Pin Ling
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Chao-Liang Wu
- Ditmanson Medical Foundation Chia-Yi Christian Hospital, Chiayi City 60002, Taiwan
- Department of Biochemistry and Molecular Biology, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| |
Collapse
|
10
|
Chen SY, Wang CT, Chen CY, Kuo PY, Wang CR, Shiau AL, Chang CH, Wu CL. Galectin-3 Mediates NETosis and Acts as an Autoantigen in Systemic Lupus Erythematosus-Associated Diffuse Alveolar Haemorrhage. Int J Mol Sci 2023; 24:ijms24119493. [PMID: 37298447 DOI: 10.3390/ijms24119493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 05/24/2023] [Accepted: 05/25/2023] [Indexed: 06/12/2023] Open
Abstract
Systemic lupus erythematosus (SLE) is a systemic autoimmune disease with enhanced NETosis and impaired degradation of neutrophil extracellular traps (NETs). Galectin-3 is a β-galactoside binding protein and is associated with neutrophil functions as well as involved in mediating autoimmune disorders. In this study, we plan to examine the associations of galectin-3 with the pathogenesis of SLE and NETosis. Galectin-3 expression levels were determined in peripheral blood mononuclear cells (PBMCs) of SLE patients for the association with lupus nephritis (LN) or correlation of SLE disease activity index 2000 (SLEDAI-2K). NETosis was observed in human normal and SLE and murine galectin-3 knockout (Gal-3 KO) neutrophils. Gal-3 KO and wild-type (WT) mice induced by pristane were used to evaluate disease signs, including diffuse alveolar haemorrhage (DAH), LN, proteinuria, anti-ribonucleoprotein (RNP) antibody, citrullinated histone 3 (CitH3) levels, and NETosis. Galectin-3 levels are higher in PBMCs of SLE patients compared with normal donors and positively correlated with LN or SLEDAI-2K. Gal-3 KO mice have higher percent survival and lower DAH, LN proteinuria, and anti-RNP antibody levels than WT mice induced by pristane. NETosis and citH3 levels are reduced in Gal-3 KO neutrophils. Furthermore, galectin-3 resides in NETs while human neutrophils undergo NETosis. Galectin-3-associated immune complex deposition can be observed in NETs from spontaneously NETotic cells of SLE patients. In this study, we provide clinical relevance of galectin-3 to the lupus phenotypes and the underlying mechanisms of galectin-3-mediated NETosis for developing novel therapeutic strategies targeting galectin-3 for SLE.
Collapse
Affiliation(s)
- Shih-Yao Chen
- Department of Nursing, College of Nursing, Chung Hwa University of Medical Technology, Tainan 71703, Taiwan
| | - Chung-Teng Wang
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, 1 University Road, Tainan 70101, Taiwan
- Department of Internal Medicine, School of Medicine, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Ching-Yi Chen
- Department of Biochemistry and Molecular Biology, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Pin-Yu Kuo
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, 1 University Road, Tainan 70101, Taiwan
| | - Chrong-Reen Wang
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, 1 University Road, Tainan 70101, Taiwan
- Department of Internal Medicine, National Cheng Kung University Hospital, Tainan 70403, Taiwan
| | - Ai-Li Shiau
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, 1 University Road, Tainan 70101, Taiwan
- Ditmanson Medical Foundation Chia-Yi Christian Hospital, Zhongxiao Road 539, East District, Chiayi 60002, Taiwan
| | - Cheng-Hsi Chang
- Department of Cardiovascular Surgery, Ditmanson Medical Foundation Chia-Yi Christian Hospital, Chiayi 60002, Taiwan
| | - Chao-Liang Wu
- Department of Biochemistry and Molecular Biology, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
- Ditmanson Medical Foundation Chia-Yi Christian Hospital, Zhongxiao Road 539, East District, Chiayi 60002, Taiwan
| |
Collapse
|
11
|
Wu JS, Hong TC, Wu HT, Lin YJ, Chang TT, Wang CT, Liu WC, Hsieh MT, Wu IC, Chen PJ, Chen CY, Lin SH, Chuang CH, Han MZ, Chen HP, Tsai HM, Kuo HY. Hepatic arterial infusion chemotherapy and immune checkpoint inhibitors, alone or in combination, in advanced hepatocellular carcinoma with macrovascular invasion: a single-centre experience in Taiwan. J Gastrointest Oncol 2023; 14:849-862. [PMID: 37201085 PMCID: PMC10186549 DOI: 10.21037/jgo-22-858] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 04/04/2023] [Indexed: 05/20/2023] Open
Abstract
Background The presence of vascular invasion is associated with poor survival in advanced hepatocellular carcinoma (HCC). We compared the effectiveness of hepatic arterial infusion chemotherapy (HAIC) and immune checkpoint inhibitors (ICIs), alone or in combination, in patients with advanced HCC. Methods We retrospectively reviewed medical records of adult patients with unresectable HCC and macrovascular invasion (MVI) who were treated with HAIC or ICIs alone or in combination at a single centre in Taiwan. Overall tumour response, vascular thrombi response, overall survival (OS) and progression-free survival (PFS) in 130 patients were analysed. Results The treatment group showed no significant effect on the overall tumour response [objective response rate (ORR), 22.86% for HAIC, 26.09% for ICI, 50.00% for HAIC+ICI; P=0.111], but showed a significant effect on vessel response (objective response rate of tumour thrombi (ORRT), 38.57% for HAIC, 45.65% for ICI, 78.57% for HAIC+ICI; P=0.023). Post-hoc comparisons followed by Bonferroni correction revealed that vessel ORRT was significantly different between the HAIC+ICI and HAIC groups (P=0.014). A significant effect of treatment group on portal vein tumour thrombus (PVTT) was also detected (ORRT, 40.00% for HAIC, 50.00% for ICI, 90.00% for HAIC; P=0.013), with significant difference between the HAIC+ICI and HAIC groups (P=0.005). Patients treated with HAIC, ICI, and HAIC+ICI respectively had 12-month OS rates of 44.9%, 31.4%, and 67.5% (P=0.127) and 12-month PFS rates of 21.2%, 24.6%, and 33.2% (P=0.091). In multivariate analysis of PFS, HAIC+ICI was associated with reduced risk of progression or death compared with HAIC alone (adjusted hazard ratio: 0.46; 95% confidence interval: 0.23-0.94; P=0.032). Conclusions HAIC combined with ICIs had a superior response of PVTT compared to HAIC alone, and was associated with reduced risk of progression or death. Future studies are needed to address the survival benefit of the combination therapy in advanced HCC with MVI.
Collapse
Affiliation(s)
- Juei-Seng Wu
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan
| | - Tzu-Chun Hong
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan
| | - Hung-Tsung Wu
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan
| | - Yih-Jyh Lin
- Department of Surgery, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan
| | - Ting-Tsung Chang
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan
| | - Chung-Teng Wang
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan
| | - Wen-Chun Liu
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan
| | - Ming-Tsung Hsieh
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan
| | - I-Chin Wu
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan
| | - Po-Jun Chen
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan
| | - Chiung-Yu Chen
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan
| | - Sheng-Hsiang Lin
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan
- Department of Public Health, College of Medicine, National Cheng Kung University, Tainan
- Biostatistics Consulting Center, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan
| | - Chiao-Hsiung Chuang
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan
| | - Meng-Zhi Han
- Department of Internal Medicine, An Nan Hospital, China Medical University, Tainan
| | - Huang-Pin Chen
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan
| | - Hong-Ming Tsai
- Department of Diagnostic Radiology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan
| | - Hsin-Yu Kuo
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan
| |
Collapse
|
12
|
Hu CY, Wu HT, Shan YS, Wang CT, Shieh GS, Wu CL, Ou HY. Evodiamine Exhibits Anti-Bladder Cancer Activity by Suppression of Glutathione Peroxidase 4 and Induction of Ferroptosis. Int J Mol Sci 2023; 24:ijms24076021. [PMID: 37046995 PMCID: PMC10094601 DOI: 10.3390/ijms24076021] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 03/17/2023] [Accepted: 03/21/2023] [Indexed: 04/03/2023] Open
Abstract
Evodiamine (EVO) exhibits anti-cancer activity through the inhibition of cell proliferation; however, little is known about its underlying mechanism. To determine whether ferroptosis is involved in the therapeutic effects of EVO, we investigated critical factors, such as lipid peroxidation levels and glutathione peroxidase 4 (GPX4) expression, under EVO treatment. Our results showed that EVO inhibited the cell proliferation of poorly differentiated, high-grade bladder cancer TCCSUP cells in a dose- and time-dependent manner. Lipid peroxides were detected by fluorescence microscopy after cancer cell exposure to EVO. GPX4, which catalyzes the conversion of lipid peroxides to prevent cells from undergoing ferroptosis, was decreased dose-dependently by EVO treatment. Given the features of iron dependency and lipid-peroxidation-driven death in ferroptosis, the iron chelator deferoxamine (DFO) was used to suppress EVO-induced ferroptosis. The lipid peroxide level significantly decreased when cells were treated with DFO prior to EVO treatment. DFO also attenuated EVO-induced cell death. Co-treatment with a pan-caspase inhibitor or necroptosis inhibitor with EVO did not alleviate cancer cell death. These results indicate that EVO induces ferroptosis rather than apoptosis or necroptosis. Furthermore, EVO suppressed the migratory ability, decreased the expression of mesenchymal markers, and increased epithelial marker expression, determined by a transwell migration assay and Western blotting. The TCCSUP bladder tumor xenograft tumor model confirmed the effects of EVO on the inhibition of tumor growth and EMT. In conclusion, EVO is a novel inducer for activating the ferroptosis of bladder cancer cells and may be a potential therapeutic agent for bladder cancer.
Collapse
Affiliation(s)
- Che-Yuan Hu
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan; (C.-Y.H.)
- Department of Urology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Hung-Tsung Wu
- Department of Internal Medicine, School of Medicine, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Yan-Shen Shan
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan; (C.-Y.H.)
- Department of Surgery, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Chung-Teng Wang
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Gia-Shing Shieh
- Department of Urology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
- Department of Urology, Tainan Hospital, Ministry of Health and Welfare, Executive Yuan, Tainan 70043, Taiwan
| | - Chao-Liang Wu
- Ditmanson Medical Foundation Chia-Yi Christian Hospital, Chiayi 600566, Taiwan
- Department of Biochemistry and Molecular Biology, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
- Correspondence: (C.-L.W.); (H.-Y.O.); Tel.: +886-920-598-519 (C.-L.W.); +886-6-2353535 (ext. 4577) (H.-Y.O.)
| | - Horng-Yih Ou
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan; (C.-Y.H.)
- Department of Internal Medicine, School of Medicine, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
- Correspondence: (C.-L.W.); (H.-Y.O.); Tel.: +886-920-598-519 (C.-L.W.); +886-6-2353535 (ext. 4577) (H.-Y.O.)
| |
Collapse
|
13
|
Huang SY, Sun R, Chen YC, Kang L, Wang CT, Chiu CF, Wu HT. Aspartame consumption during pregnancy impairs placenta growth in mice through sweet taste receptor-reactive oxygen species-dependent pathway. J Nutr Biochem 2023; 113:109228. [PMID: 36435291 DOI: 10.1016/j.jnutbio.2022.109228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 09/23/2022] [Accepted: 10/05/2022] [Indexed: 11/25/2022]
Abstract
The prevalence of obesity has risen dramatically over recent years, and so has the prevalence of adverse obesity-associated pregnancy outcomes. To combat obesity, the calorie contents of many foods and beverages may be reduced by the use of artificial sweeteners, such as aspartame. However, animal studies suggest that aspartame and its metabolites may exhibit toxicity, and the effects of aspartame on pregnancy are largely unknown. In this study, we treated pregnant mice with aspartame by oral gavage and found that the treatment decreased fasting blood glucose level, whereas systolic blood pressure was elevated. Importantly, the aspartame-treated animals also had low placenta and fetus weights, as well as reduced thickness of the placenta decidua layer. Moreover, aspartame decreased the expression of epithelial-mesenchymal transition proteins and manganese superoxide dismutase (MnSOD) in mouse placentae. In order to clarify the mechanisms though which aspartame affects placenta, we performed experiments on 3A-sub-E trophoblasts. In the cells, aspartame treatments induced cell cycle arrest and reduced the proliferation rate, epithelial-mesenchymal transition, migration activity and invasion activity. We also found that aspartame increased reactive oxygen species (ROS) levels to hyper-activate Akt and downregulate MnSOD expression. Pretreatment with antioxidants or sweet taste receptor inhibitors reversed the effects of aspartame on trophoblast function. We also found that the aspartame metabolite phenylalanine similarly induced ROS production and affected proliferation of trophoblasts. Taken together, our data suggest that aspartame consumption during pregnancy may impact the structure, growth and function of the placenta via sweet taste receptor-mediated stimulation of oxidative stress.
Collapse
Affiliation(s)
- Shih-Yi Huang
- School of Nutrition and Health Sciences, Taipei Medical University, Taipei, Taiwan; Graduate Institute of Metabolism and Obesity Sciences, Taipei Medical University, Taipei, Taiwan; Nutrition Research Center, Taipei Medical University Hospital, Taipei, Taiwan
| | - Rong Sun
- School of Nutrition and Health Sciences, Taipei Medical University, Taipei, Taiwan
| | - Yang-Ching Chen
- Graduate Institute of Metabolism and Obesity Sciences, Taipei Medical University, Taipei, Taiwan; Department of Family Medicine, School of medicine, College of medicine, Taipei Medical University, Taipei, Taiwan
| | - Lin Kang
- Department of Obstetrics and Gynecology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Chung-Teng Wang
- Department of Internal Medicine, School of Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Ching-Feng Chiu
- Graduate Institute of Metabolism and Obesity Sciences, Taipei Medical University, Taipei, Taiwan
| | - Hung-Tsung Wu
- Department of Internal Medicine, School of Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
| |
Collapse
|
14
|
Yang ML, Chen YC, Wang CT, Chong HE, Chung NH, Leu CH, Liu FT, Lai MMC, Ling P, Wu CL, Shiau AL. Upregulation of galectin-3 in influenza A virus infection promotes viral RNA synthesis through its association with viral PA protein. J Biomed Sci 2023; 30:14. [PMID: 36823664 PMCID: PMC9948428 DOI: 10.1186/s12929-023-00901-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 01/11/2023] [Indexed: 02/25/2023] Open
Abstract
BACKGROUND Influenza is one of the most important viral infections globally. Viral RNA-dependent RNA polymerase (RdRp) consists of the PA, PB1, and PB2 subunits, and the amino acid residues of each subunit are highly conserved among influenza A virus (IAV) strains. Due to the high mutation rate and emergence of drug resistance, new antiviral strategies are needed. Host cell factors are involved in the transcription and replication of influenza virus. Here, we investigated the role of galectin-3, a member of the β-galactoside-binding animal lectin family, in the life cycle of IAV infection in vitro and in mice. METHODS We used galectin-3 knockout and wild-type mice and cells to study the intracellular role of galectin-3 in influenza pathogenesis. Body weight and survival time of IAV-infected mice were analyzed, and viral production in mouse macrophages and lung fibroblasts was examined. Overexpression and knockdown of galectin-3 in A549 human lung epithelial cells were exploited to assess viral entry, viral ribonucleoprotein (vRNP) import/export, transcription, replication, virion production, as well as interactions between galectin-3 and viral proteins by immunoblotting, immunofluorescence, co-immunoprecipitation, RT-qPCR, minireplicon, and plaque assays. We also employed recombinant galectin-3 proteins to identify specific step(s) of the viral life cycle that was affected by exogenously added galectin-3 in A549 cells. RESULTS Galectin-3 levels were increased in the bronchoalveolar lavage fluid and lungs of IAV-infected mice. There was a positive correlation between galectin-3 levels and viral loads. Notably, galectin-3 knockout mice were resistant to IAV infection. Knockdown of galectin-3 significantly reduced the production of viral proteins and virions in A549 cells. While intracellular galectin-3 did not affect viral entry, it increased vRNP nuclear import, RdRp activity, and viral transcription and replication, which were associated with the interaction of galectin-3 with viral PA subunit. Galectin-3 enhanced the interaction between viral PA and PB1 proteins. Moreover, exogenously added recombinant galectin-3 proteins also enhanced viral adsorption and promoted IAV infection in A549 cells. CONCLUSION We demonstrate that galectin-3 enhances viral infection through increases in vRNP nuclear import and RdRp activity, thereby facilitating viral transcription and replication. Our findings also identify galectin-3 as a potential therapeutic target for influenza.
Collapse
Affiliation(s)
- Mei-Lin Yang
- grid.64523.360000 0004 0532 3255Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, 1, University Road, Tainan, 701401 Taiwan ,grid.413878.10000 0004 0572 9327Ditmanson Medical Foundation Chia-Yi Christian Hospital, Chiayi, Taiwan
| | - Yi-Cheng Chen
- grid.64523.360000 0004 0532 3255Department of Biochemistry and Molecular Biology, College of Medicine, National Cheng Kung University, 1, University Road, Tainan, 701401 Taiwan
| | - Chung-Teng Wang
- grid.64523.360000 0004 0532 3255Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, 1, University Road, Tainan, 701401 Taiwan
| | - Hao-Earn Chong
- grid.64523.360000 0004 0532 3255Department of Biochemistry and Molecular Biology, College of Medicine, National Cheng Kung University, 1, University Road, Tainan, 701401 Taiwan
| | - Nai-Hui Chung
- grid.64523.360000 0004 0532 3255Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, 1, University Road, Tainan, 701401 Taiwan
| | - Chia-Hsing Leu
- grid.64523.360000 0004 0532 3255Department of Biochemistry and Molecular Biology, College of Medicine, National Cheng Kung University, 1, University Road, Tainan, 701401 Taiwan
| | - Fu-Tong Liu
- grid.28665.3f0000 0001 2287 1366Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Michael M. C. Lai
- grid.254145.30000 0001 0083 6092Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan ,grid.28665.3f0000 0001 2287 1366Institute of Molecular Biology, Academia Sinica, Taipei, Taiwan
| | - Pin Ling
- grid.64523.360000 0004 0532 3255Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, 1, University Road, Tainan, 701401 Taiwan
| | - Chao-Liang Wu
- Ditmanson Medical Foundation Chia-Yi Christian Hospital, Chiayi, Taiwan. .,Department of Biochemistry and Molecular Biology, College of Medicine, National Cheng Kung University, 1, University Road, Tainan, 701401, Taiwan.
| | - Ai-Li Shiau
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, 1, University Road, Tainan, 701401, Taiwan. .,Ditmanson Medical Foundation Chia-Yi Christian Hospital, Chiayi, Taiwan.
| |
Collapse
|
15
|
Hu CY, Su BH, Lee YC, Wang CT, Yang ML, Shen WT, Fu JT, Chen SY, Huang WY, Ou CH, Tsai YS, Kuo FC, Shiau AL, Shieh GS, Wu CL. Interruption of the long non-coding RNA HOTAIR signaling axis ameliorates chemotherapy-induced cachexia in bladder cancer. J Biomed Sci 2022; 29:104. [PMID: 36471329 PMCID: PMC9724340 DOI: 10.1186/s12929-022-00887-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 11/22/2022] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Cisplatin-based chemotherapy is the first line of treatment for bladder cancer. However, cisplatin induces muscle wasting associated with NF-κB and cancer cachexia. HOTAIR, an oncogenic long non-coding RNA (lncRNA), promotes cancer progression in different cancers. Crosstalk between HOTAIR and NF-κB is documented. Prothymosin α (ProT) plays important roles in cancer progression and inflammation. However, the potential link between HOTAIR, ProT, and cisplatin-induced cancer cachexia remains unexplored. Here, we investigated the contribution of HOTAIR in cisplatin-induced cancer cachexia and dissected the potential signaling cascade involving the epidermal growth factor receptor (EGFR), ProT, NF-κB, and HOTAIR. MATERIALS AND METHODS Expression of ProT and HOTAIR transcripts and their correlations in tumor tissues of bladder cancer patients and bladder cancer cell lines were determined by RT-qPCR. Next, levels of phospho-EGFR, EGFR, phospho-NF-κB, and NF-κB were examined by immunoblot analysis in human bladder cancer cells treated with cisplatin. Expression of HOTAIR in cisplatin-treated cells was also assessed by RT-qPCR. Pharmacological inhibitors and overexpression and knockdown approaches were exploited to decipher the signaling pathway. The murine C2C12 myoblasts were used as an in vitro muscle atrophy model. The syngeneic murine MBT-2 bladder tumor was used to investigate the role of mouse Hotair in cisplatin-induced cancer cachexia. RESULTS Expression of ProT and HOTAIR was higher in bladder tumors than in normal adjacent tissues. There were positive correlations between ProT and HOTAIR expression in clinical bladder tumors and bladder cancer cell lines. Cisplatin treatment increased EGFR and NF-κB activation and upregulated ProT and HOTAIR expression in bladder cancer cells. ProT overexpression increased, whereas ProT knockdown decreased, HOTAIR expression. Notably, cisplatin-induced HOTAIR upregulation was abrogated by EGFR inhibitors or ProT knockdown. ProT-induced HOTAIR overexpression was diminished by NF-κB inhibitors. HOTAIR overexpression enhanced, whereas its knockdown reduced, cell proliferation, cachexia-associated pro-inflammatory cytokine expression, and muscle atrophy. Cachexia-associated symptoms were ameliorated in mice bearing Hotair-knockdown bladder tumors undergoing cisplatin treatment. CONCLUSIONS We demonstrate for the first time a critical role for HOTAIR and identify the involvement of the EGFR-ProT-NF-κB-HOTAIR signaling axis in cisplatin-induced cachexia in bladder cancer and likely other cancers. Our findings also provide therapeutic targets for this disease.
Collapse
Affiliation(s)
- Che-Yuan Hu
- grid.64523.360000 0004 0532 3255Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan ,grid.64523.360000 0004 0532 3255Department of Urology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, 138, Sheng Li Road, Tainan, 704302 Taiwan
| | - Bing-Hua Su
- grid.412896.00000 0000 9337 0481School of Respiratory Therapy, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Ya-Che Lee
- grid.413878.10000 0004 0572 9327Department of Urology, Ditmanson Medical Foundation Chia-Yi Christian Hospital, Chiayi, Taiwan
| | - Chung-Teng Wang
- grid.64523.360000 0004 0532 3255Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, 1 University Road, Tainan, 701401 Taiwan
| | - Mei-Lin Yang
- grid.64523.360000 0004 0532 3255Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, 1 University Road, Tainan, 701401 Taiwan ,grid.413878.10000 0004 0572 9327Ditmanson Medical Foundation Chia-Yi Christian Hospital, Chiayi, Taiwan
| | - Wan-Ting Shen
- grid.64523.360000 0004 0532 3255Department of Biochemistry and Molecular Biology, College of Medicine, National Cheng Kung University, 1 University Road, Tainan, 701401 Taiwan
| | - Jing-Ting Fu
- grid.64523.360000 0004 0532 3255Department of Biochemistry and Molecular Biology, College of Medicine, National Cheng Kung University, 1 University Road, Tainan, 701401 Taiwan
| | - Shih-Yao Chen
- grid.411636.70000 0004 0634 2167Department of Nursing, College of Nursing, Chung Hwa University of Medical Technology, Tainan, Taiwan
| | - Wei-Yun Huang
- grid.64523.360000 0004 0532 3255Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, 1 University Road, Tainan, 701401 Taiwan
| | - Chien-Hui Ou
- grid.64523.360000 0004 0532 3255Department of Urology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, 138, Sheng Li Road, Tainan, 704302 Taiwan
| | - Yuh-Shyan Tsai
- grid.64523.360000 0004 0532 3255Department of Urology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, 138, Sheng Li Road, Tainan, 704302 Taiwan
| | - Feng-Chih Kuo
- grid.260565.20000 0004 0634 0356Division of Endocrinology and Metabolism, Department of Internal Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Ai-Li Shiau
- grid.64523.360000 0004 0532 3255Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, 1 University Road, Tainan, 701401 Taiwan ,grid.413878.10000 0004 0572 9327Ditmanson Medical Foundation Chia-Yi Christian Hospital, Chiayi, Taiwan
| | - Gia-Shing Shieh
- grid.64523.360000 0004 0532 3255Department of Urology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, 138, Sheng Li Road, Tainan, 704302 Taiwan ,grid.454740.6Department of Urology, Tainan Hospital, Ministry of Health and Welfare, Executive Yuan, Tainan, Taiwan
| | - Chao-Liang Wu
- grid.413878.10000 0004 0572 9327Ditmanson Medical Foundation Chia-Yi Christian Hospital, Chiayi, Taiwan ,grid.64523.360000 0004 0532 3255Department of Biochemistry and Molecular Biology, College of Medicine, National Cheng Kung University, 1 University Road, Tainan, 701401 Taiwan
| |
Collapse
|
16
|
Kuo HY, Han MZ, Liao CH, Lin YJ, Wang CT, Chen SH, Chang TT, Chen PJ, Lin SH, Chen CY, Chuang CH, Wu IC, Wu JS, Hong TC, Hsieh MT, Lee YC, Wu HT, Tsai HM. Real-World Comparative Effectiveness of Nivolumab versus Pembrolizumab in Patients with Unresectable Hepatocellular Carcinoma. Pharmaceutics 2022; 14:2263. [PMID: 36365082 PMCID: PMC9697961 DOI: 10.3390/pharmaceutics14112263] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 09/23/2022] [Accepted: 10/19/2022] [Indexed: 08/31/2023] Open
Abstract
PURPOSE Immune checkpoint inhibitors are effective therapies for advanced hepatocellular carcinoma (HCC); however, comparisons of the clinical efficacy and safety profile for these drugs are still scarce. Thus, the aims of this study were to investigate the differences in efficacy and safety between nivolumab and pembrolizumab in unresectable HCC patients in a real-world setting. PATIENTS AND METHODS A total of 115 patients who received treatment with nivolumab (n = 73) or pembrolizumab (n = 42) in combination with or without tyrosine kinase inhibitors was enrolled. Therapeutic response, survival outcomes, and safety profiles were compared among these groups. Multivariate analysis of survival response was performed using Cox proportional hazards regression. RESULTS Patients treated with pembrolizumab demonstrated a significantly higher objective response rate than those with nivolumab (38.1% vs. 15.1%; odds ratio 4.18, p = 0.005) regardless of the combination strategies. In addition, pembrolizumab performed a better overall survival (OS) than nivolumab, (34.9 vs. 9.5 months; hazard ratio (HR) = 0.39, p = 0.004). In subgroup analysis, pembrolizumab exhibited favorable OS than nivolumab for monotherapy (HR = 0.16, p = 0.001) or combination therapy (HR = 0.33, p = 0.006) as second-line or later-line (HR = 0.19, p = 0.001) therapy and those with (HR = 0.31, p = 0.006) or without (HR = 0.15, p = 0.004) well-compensated liver disease. The incidence of adverse events was comparable for both treatments. CONCLUSION Both pembrolizumab and nivolumab had significant effects for HCC therapy, and pembrolizumab had a significant survival benefit as compared with nivolumab.
Collapse
Affiliation(s)
- Hsin-Yu Kuo
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Meng-Zhi Han
- Department of Internal Medicine, An Nan Hospital, China Medical University, Tainan 70965, Taiwan
| | - Chih-Hsiang Liao
- Department of Environmental Resources Management, Chia Nan University of Pharmacy and Science, Tainan 71710, Taiwan
| | - Yih-Jyh Lin
- Department of Surgery, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Chung-Teng Wang
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Shang-Hung Chen
- Department of Oncology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70456, Taiwan
- National Institute of Cancer Research, National Health Research Institutes, Tainan 70456, Taiwan
| | - Ting-Tsung Chang
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Po-Jun Chen
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Sheng-Hsiang Lin
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
- Department of Public Health, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
- Biostatistics Consulting Center, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Chiung-Yu Chen
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Chiao-Hsiung Chuang
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - I-Chin Wu
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Juei-Seng Wu
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Tzu-Chun Hong
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Ming-Tsung Hsieh
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Yang-Cheng Lee
- Department of Internal Medicine, Tainan Municipal Hospital, Tainan 70103, Taiwan
| | - Hung-Tsung Wu
- Department of Internal Medicine, School of Medicine, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Hong-Ming Tsai
- Department of Diagnostic Radiology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| |
Collapse
|
17
|
Li CH, Wang CT, Lin YJ, Kuo HY, Wu JS, Hong TC, Chang CJ, Wu HT. Long-term consumption of the sugar substitute sorbitol alters gut microbiome and induces glucose intolerance in mice. Life Sci 2022; 305:120770. [DOI: 10.1016/j.lfs.2022.120770] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Revised: 06/21/2022] [Accepted: 06/29/2022] [Indexed: 01/07/2023]
|
18
|
Wang CT, Xu JC, Chan KC, Lee HH, Tso CY, Lin CSK, Chao CYH, Fu SC. Infection control measures for public transportation derived from the flow dynamics of obstructed cough jet. J Aerosol Sci 2022; 163:105995. [PMID: 35382445 PMCID: PMC8971108 DOI: 10.1016/j.jaerosci.2022.105995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2022] [Revised: 03/21/2022] [Accepted: 03/21/2022] [Indexed: 06/14/2023]
Abstract
During the COVID-19 pandemic, WHO and CDC suggest people stay 1 m and 1.8 m away from others, respectively. Keeping social distance can avoid close contact and mitigate infection spread. Many researchers suspect that suggested distances are not enough because aerosols can spread up to 7-8 m away. Despite the debate on social distance, these social distances rely on unobstructed respiratory activities such as coughing and sneezing. Differently, in this work, we focused on the most common but less studied aerosol spread from an obstructed cough. The flow dynamics of a cough jet blocked by the backrest and gasper jet in a cabin environment was characterized by the particle image velocimetry (PIV) technique. It was proved that the backrest and the gasper jet can prevent the front passenger from droplet spray in public transportation where maintaining social distance was difficult. A model was developed to describe the cough jet trajectory due to the gasper jet, which matched well with PIV results. It was found that buoyancy and inside droplets almost do not affect the short-range cough jet trajectory. Infection control measures were suggested for public transportation, including using backrest/gasper jet, installing localized exhaust, and surface cleaning of the backrest.
Collapse
Affiliation(s)
- C T Wang
- Department of Mechanical Engineering, The University of Hong Kong, Hong Kong, China
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong, China
| | - J C Xu
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong, China
| | - K C Chan
- Department of Mechanical Engineering, The University of Hong Kong, Hong Kong, China
| | - H H Lee
- Department of Energy and Environment, City University of Hong Kong, Hong Kong, China
| | - C Y Tso
- Department of Energy and Environment, City University of Hong Kong, Hong Kong, China
| | - Carol S K Lin
- Department of Energy and Environment, City University of Hong Kong, Hong Kong, China
| | - Christopher Y H Chao
- Department of Mechanical Engineering, The University of Hong Kong, Hong Kong, China
- Department of Building Environment and Energy Engineering & Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hong Kong, China
| | - S C Fu
- Department of Mechanical Engineering, The University of Hong Kong, Hong Kong, China
| |
Collapse
|
19
|
Wang CT. [The current status and prospect of catheter-based treatment of ascending aorta and aortic root diseases]. Zhonghua Wai Ke Za Zhi 2021; 59:443-446. [PMID: 34102725 DOI: 10.3760/cma.j.cn112139-20200910-00693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
In recent years, the endovascular procedures has considerably evolved in concepts, technologies, materials and devices on cardiovascular surgery, and influenced the development and the future direction of cardiovascular surgery technology. Endovascular aorta repair is well recognized as the optimal therapy for patients presenting with acute or chronic pathology of distal aortic arch, descending aorta and thoraco-abdominal aorta. The use of catheter-based endovascular repair in the ascending aorta pathology including aneurysms, pseudoaneurysms, penetrating aortic ulcers and acute or chronic Stanford type A aortic dissection has been concerned and reported. Comparing to the open surgical procedures for ascending aorta and aortic root disease with high perioperative mortality and morbidity, the catheter-based endovascular repair has minimally invasive, expanding the alternative treatment of ascending aorta disease, especially for patients with high-risk profiles. However, due to the complex anatomy and functional properties, materials and devices, the use of this technique in ascending aorta and aortic root is still questionable. In addition, the long-term and reliable clinical research results is still inadequate, and the safety and effectiveness need further research.
Collapse
Affiliation(s)
- C T Wang
- Department of Cardiothoracic Surgery, General Hospital of Eastern Theater Command, Nanjing 210002, China
| |
Collapse
|
20
|
Wu HW, Sun L, Zhang L, Xi ZL, Qin T, Wang CT, Li DM. [Clinical analysis of 30 cases of traumatic aortic injury]. Zhonghua Wai Ke Za Zhi 2020; 58:929-935. [PMID: 33249811 DOI: 10.3760/cma.j.cn112139-20200101-00001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To examine the clinical treatment methods and short- and mid-term results of traumatic aortic injury (TAI). Methods: The clinical data of 30 patients suffering from TAI who were admitted to Department of Cardiothoracic Surgery, General Hospital of Eastern Theater Command from January 2010 to December 2018 were summarized and analyzed retrospectively. All patients were diagnosed as TAI by aortic CT angiography. There were 20 males and 10 females, aging (46.4±15.2) years (range: 17 to 76 years). One patient was diagnosed as extensive intramural hematoma (IMH). The other 29 cases had aortic intimal injury, and the primary intimal tear of all these patients was located in the isthmus of descending aorta. There were 2 cases of ulcer-like changes combined with IMH, and 27 cases of traumatic aortic dissection (TAD) including 23 cases of localized TAD and 4 cases of extensive TAD. Endovascular repair, artificial vascular replacement or conservative treatment were performed according to the patient's specific condition. The patients were followed up in outpatient or by telephone. The clinical data of all the patients of the in-hospital treatment and during follow-up period was analyzed retrospectively. Results: One patient with IMH was treated conservatively. Surgical intervention was performed in 29 cases with intimal injury, of which 14 cases underwent emergency surgery on the day of admission or the next day, and 15 cases underwent elective surgery. Twenty-seven cases underwent thoracic endovascular aortic repair (TEVAR), and 2 cases underwent artificial vascular replacement. Nine cases suffered combined operations in early or late stage. All patients were cured and discharged with in-hospital stay of (13.2±5.4) days (range: 7 to 30 days). There was no in-hospital death. Two patients underwent tracheotomy, and the rest had no serious complications. Up to the last follow-up in June 2019, 4 patients were lost to follow-up, and the remaining 26 patients were followed up for (50.6±34.1) months (range: 6 to 112 months) and survived healthily without new aortic events. Conclusions: Most of TAD cases are ascribed to Stanford type B aortic dissection, and a satisfactory short-term and mid-term result can be achieved by emergency TEVAR in most patients. Some patients can achieve good long-term results by open surgery with artificial vascular replacement.
Collapse
Affiliation(s)
- H W Wu
- Department of Cardiothoracic Surgery, General Hospital of Eastern Theater Command, Nanjing 210002, China
| | - L Sun
- Department of Cardiothoracic Surgery, General Hospital of Eastern Theater Command, Nanjing 210002, China
| | - L Zhang
- Department of Cardiothoracic Surgery, General Hospital of Eastern Theater Command, Nanjing 210002, China
| | - Z L Xi
- Department of Cardiothoracic Surgery, General Hospital of Eastern Theater Command, Nanjing 210002, China
| | - T Qin
- Department of Cardiothoracic Surgery, General Hospital of Eastern Theater Command, Nanjing 210002, China
| | - C T Wang
- Department of Cardiothoracic Surgery, General Hospital of Eastern Theater Command, Nanjing 210002, China
| | - D M Li
- Department of Cardiothoracic Surgery, General Hospital of Eastern Theater Command, Nanjing 210002, China
| |
Collapse
|
21
|
Chen L, Wang CT, Forsyth NR, Wu P. Transcriptional profiling reveals altered biological characteristics of chorionic stem cells from women with gestational diabetes. Stem Cell Res Ther 2020; 11:319. [PMID: 32711583 PMCID: PMC7382800 DOI: 10.1186/s13287-020-01828-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Revised: 06/30/2020] [Accepted: 07/13/2020] [Indexed: 12/17/2022] Open
Abstract
Background Gestational diabetes (GDM) is a common complication of pregnancy. The impact of pregnancy complications on placental function suggests that extraembryonic stem cells in the placenta may also be affected during pregnancy. Neonatal tissue-derived stem cells, with the advantages of their differentiation capacity and non-invasive isolation processes, have been proposed as a promising therapeutic avenue for GDM management through potential cell therapy approaches. However, the influence of GDM on autologous stem cells remains unclear. Thus, studies that provide comprehensive understanding of stem cells isolated from women with GDM are essential to guide future clinical applications. Methods Human chorionic membrane-derived stem cells (CMSCs) were isolated from placentas of healthy and GDM pregnancies. Transcriptional profiling was performed by DNA microarray, and differentially regulated genes between GDM- and Healthy-CMSCs were used to analyse molecular functions, differentiation, and pathway enrichment. Altered genes and biological functions were validated via real-time PCR and in vitro assays. Results GDM-CMSCs displayed, vs. Healthy-CMSCs, 162 upregulated genes associated with increased migration ability, epithelial development, and growth factor-associated signal transduction while the 269 downregulated genes were strongly linked to angiogenesis and cellular metabolic processes. Notably, significantly reduced expression of detoxification enzymes belonging to the aldehyde dehydrogenase gene families (ALDH1A1/1A2, ALDH2, ALDH3) accounted for downregulation across several metabolic pathways. ALDH activity and inhibitor assays indicated that reduced gene expression of ALDHs affected ALDH enzymatic functions and resulted in oxidative stress dysregulation in GDM-CMSCs. Conclusion Our combined transcriptional analysis and in vitro functional characterisation have provided novel insights into fundamental biological differences in GDM- and Healthy-CMSCs. Enhanced mobility of GDM-CMSCs may promote MSC migration toward injured sites; however, impaired cellular metabolic activity may negatively affect any perceived benefit.
Collapse
Affiliation(s)
- Liyun Chen
- Guy Hilton Research Centre, School of Pharmacy and Bioengineering, Keele University, Thornburrow Drive, Stoke-on-Trent, UK.,Department of Radiation Oncology, Washington University School of Medicine, St Louis, MO, USA
| | - Chung-Teng Wang
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Nicholas R Forsyth
- Guy Hilton Research Centre, School of Pharmacy and Bioengineering, Keele University, Thornburrow Drive, Stoke-on-Trent, UK. .,School of Life Science, Guangzhou University, Guangzhou, 510006, China.
| | - Pensee Wu
- Guy Hilton Research Centre, School of Pharmacy and Bioengineering, Keele University, Thornburrow Drive, Stoke-on-Trent, UK.,Academic Unit of Obstetrics and Gynaecology, University Hospital of North Midlands, Stoke-on-Trent, UK.,Keele Cardiovascular Research Group, School of Primary, Community, and Social Care, Keele University, Stoke-on-Trent, UK
| |
Collapse
|
22
|
Li QQ, Wan KX, Xu MS, Wang LM, Zhang YY, Wang CT, Mao FX, Zhu JL, Pan ZM, Gao R. [The pH-Sensitive Potassium Channel TASK-1 Is a Chemosensor for Central Respiratory Regulation in Rats]. Mol Biol (Mosk) 2020; 54:457-468. [PMID: 32492009 DOI: 10.31857/s0026898420030106] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 10/30/2019] [Indexed: 11/24/2022]
Abstract
TWIK-related acid-sensitive potassium channel-1 (TASK-1) is a "leak" potassium channel sensitive to extracellular protons. It contributes to setting the resting potential in mammalian neurons. TASK-1 channels are widely expressed in respiratory-related neurons in the central nervous system. Inhibition of TASK-1 by extracellular acidosis can depolarize and increase the excitability of these cells. Here we describe the distribution of TASK-1 in the rat brainstem and show that TASK-1 mRNAs are present in respiratory-related nuclei in the ventrolateral medulla, which have been proposed as neural substrates for central chemo-reception in rats. After inhalation of 8% CO2 for 30 and 60 min, TASK-1 mRNA levels in positive-expression neurons were remarkably upregulated. Injection of the TASK-1 blocker anandamide (AEA) into the rat lateral cerebral ventricle, showed a significant excitement of respiratory at 10 min posttreatment, with a marked decrease in inspiratory and expiratory durations and an increased frequency of respiration. We suggest that TASK-1 channel may serve as a chemosensor for in central respiration and may contribute to pH-sensitive respiratory effects. TASK-1 channel might be an attractive candidate for sensing H^(+)/CO2 in several respiratory-related nuclei in the brainstem. It is likely that TASK-1 participates in pH-sensitive chemical regulation in the respiratory center under physiological and pathological conditions.
Collapse
Affiliation(s)
- Q Q Li
- Department of Basic Medical Sciences, School of Medical, Shihezi University, Shihezi, 832000 China
| | - K X Wan
- Department of Basic Medical Sciences, School of Medical, Shihezi University, Shihezi, 832000 China
| | - M S Xu
- State Key Laboratory of Sheep Genetic Improvement and Healthy Production, Xinjiang Academy of Agricultural and Reclamation Sciences, Shihezi, 832000 China
| | - L M Wang
- State Key Laboratory of Sheep Genetic Improvement and Healthy Production, Xinjiang Academy of Agricultural and Reclamation Sciences, Shihezi, 832000 China
| | - Y Y Zhang
- State Key Laboratory of Sheep Genetic Improvement and Healthy Production, Xinjiang Academy of Agricultural and Reclamation Sciences, Shihezi, 832000 China
| | - C T Wang
- Department of Basic Medical Sciences, School of Medical, Shihezi University, Shihezi, 832000 China
| | - F X Mao
- Department of Basic Medical Sciences, School of Medical, Shihezi University, Shihezi, 832000 China
| | - J L Zhu
- Department of Basic Medical Sciences, School of Medical, Shihezi University, Shihezi, 832000 China
| | - Z M Pan
- Department of Basic Medical Sciences, School of Medical, Shihezi University, Shihezi, 832000 China
| | - R Gao
- Department of Basic Medical Sciences, School of Medical, Shihezi University, Shihezi, 832000 China.,
| |
Collapse
|
23
|
Lu CS, Shiau AL, Su BH, Hsu TS, Wang CT, Su YC, Tsai MS, Feng YH, Tseng YL, Yen YT, Wu CL, Shieh GS. Oct4 promotes M2 macrophage polarization through upregulation of macrophage colony-stimulating factor in lung cancer. J Hematol Oncol 2020; 13:62. [PMID: 32487125 PMCID: PMC7268452 DOI: 10.1186/s13045-020-00887-1] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 04/28/2020] [Indexed: 01/15/2023] Open
Abstract
Background Expression of Oct4 maintains cancer stem cell (CSC)-like properties in lung cancer cells and is correlated with poor prognosis of lung adenocarcinoma. M2-type tumor-associated macrophages (TAMs) promote cancer cell migration and metastasis. Tumor microenvironments promote monocyte differentiation into M2 TAMs via a complex cytokine-based connection. We explored the role of Oct4 in cytokine secretion in lung cancer and its impact on M2 TAM polarization. Methods Monocytes co-cultured with the conditioned medium from Oct4-overexpressing lung cancer cells were used to investigate M2 TAM differentiation. The inflammatory factors in the conditioned medium of Oct4-overexpressing A549 cells were examined using human inflammation antibody arrays. The correlations of Oct4, macrophage colony-stimulating factor (M-CSF), and M2 TAMs were validated in lung cancer cells, syngeneic mouse lung tumor models, and clinical samples of non-small cell lung cancer (NSCLC). Results Oct4-overexpressing A549 cells expressed elevated levels of M-CSF, which contributed to increased M2 macrophages and enhanced tumor migration. Overexpression of Oct4 enhanced tumor growth and reduced the survival of lung tumor-bearing mice, which was correlated with increased number of M2 macrophages in lung cancer. Notably, NSCLC patients with high expression levels of Oct4, M-CSF, and M2 TAMs had the poorest recurrence-free survival. A positive correlation between Oct4, M-CSF, and M2 TAMs was observed in the tumor tissue of NSCLC patient. Treatment with all-trans retinoic acid exerted anti-tumor effects and reduced M2 TAMs in tumor-bearing mice. Conclusions Our results indicate that Oct4 expressed by lung cancer cells promotes M2 macrophage polarization through upregulation of M-CSF secretion, leading to cancer growth and metastasis. Our findings also implicate that the Oct4/M-CSF axis in M2 macrophage polarization may be potential therapeutic targets for lung cancer.
Collapse
Affiliation(s)
- Chia-Sing Lu
- Department of Biochemistry and Molecular Biology, College of Medicine, National Cheng Kung University, 1, University Road, Tainan, Taiwan
| | - Ai-Li Shiau
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Bing-Hua Su
- School of Respiratory Therapy, College of Medicine, Taipei Medical University, Taipei, Taiwan.,Division of Thoracic Surgery, Department of Surgery, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Tsui-Shan Hsu
- Department of Biochemistry and Molecular Biology, College of Medicine, National Cheng Kung University, 1, University Road, Tainan, Taiwan
| | - Chung-Teng Wang
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Yu-Chu Su
- Department of Biochemistry and Molecular Biology, College of Medicine, National Cheng Kung University, 1, University Road, Tainan, Taiwan
| | - Ming-Shian Tsai
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Yin-Hsun Feng
- Division of Hematology and Oncology, Department of Internal Medicine, Chi-Mei Medical Center, Tainan, Taiwan
| | - Yau-Lin Tseng
- Division of Thoracic Surgery, Department of Surgery, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Yi-Ting Yen
- Division of Thoracic Surgery, Department of Surgery, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Chao-Liang Wu
- Department of Biochemistry and Molecular Biology, College of Medicine, National Cheng Kung University, 1, University Road, Tainan, Taiwan
| | - Gia-Shing Shieh
- Department of Biochemistry and Molecular Biology, College of Medicine, National Cheng Kung University, 1, University Road, Tainan, Taiwan. .,Department of Urology, Tainan Hospital, Ministry of Health and Welfare, Executive Yuan, Tainan, Taiwan.
| |
Collapse
|
24
|
Li SS, Wu J, Yu XY, Luo SM, Wang JZ, Luo L, Zheng XS, Han XN, Li GY, Chen YJ, Wang CT, Huang L, Zeng QJ, Wu XW, Ren JA. [A multicenter cross-sectional study on chronic critical illness and surgery-related chronic critical illness in China]. Zhonghua Wei Chang Wai Ke Za Zhi 2019; 22:1027-1033. [PMID: 31770833 DOI: 10.3760/cma.j.issn.1671-0274.2019.11.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To understand the prevalence, diagnosis and treatment of chronic critical illness (CCI) in China. Methods: The clinical data of 472 adult patients admitted to ICU in 53 hospitals, including basic information, disease-related data, nutrition program, etc., were collected on May 10, 2019, by means of multi-center cross-sectional study. If surgical intervention was needed or the occurrence of the disease was directly related to the surgery, ICU patients were regarded as surgical ICU cases (n=211). In this study, the diagnostic criteria for CCI were: (1) admission to ICU >14 days;(2) combined with persistent organ dysfunction. The prevalence,distribution and treatment of CCI and surgery-related CCI were recorded and analyzed. The Mann-Whitney U test, chi-square test or Fisher exact test were used for comparative analysis. Results: Among the 472 ICU patients from 53 hospitals, 326 were male (69.1%) and 146 were female (30.9%). The prevalence of CCI was 30.7% (145/472). Among 211 surgery-related ICU patients, 57 developed CCI with a prevalence of 27.0%. As compared to non-CCI patients, higher APACHE II score [median (IQR) 13.5 (10.0, 18.3) vs. 11.0 (7.0, 16.0), U=2970.000, P=0.007], higher Charlson comorbidity index [median (IQR) 4.0 (2.0, 7.0) vs. 3.0 (1.0, 5.0), U= 3570.000, P=0.036] and higher ratio of breath dysfunction [68.4% (39/57) vs. 48.1% (74/154), χ(2)=6.939, P=0.008] and renal dysfunction [42.1% (24/57) vs. 18.2% (28/154), χ(2)=12.821, P<0.001] were found in surgery-related CCI patients. While SOFA score, Glasgow coma score and other visceral function were not significantly different between surgery-related CCI and non-CCI patients (all P>0.05). NUTRIC score showed that surgery-related CCI patients had higher nutritional risk [43.9% (25/57) vs. 26.6%(41/154), U=5.750, P=0.016] and higher ratio of mechanical ventilation [66.7% (38/57) vs. 52.3% (79/154), χ(2)=3.977, P=0.046] than non-CCI patients. On the survey day, the daily caloric requirements of 50.2% (106/211) of surgery-related ICU patients were calculated according to the standard adult caloric intake index (104.6 to 125.5 kJ·kg(-1)·d(-1), 1 kJ=0.239 kcal), and the daily caloric requirements of 46.4% (98/211) of patients were calculated by physicians according to the severity of the patient's condition. 60.2% (127/211) of nutritional support therapy was enteral nutrition (including a combination of enteral and parenteral nutrition), while the remaining patients received parenteral nutrition (24.6%, 52/211), simple glucose infusion (9.0%, 19/211), or oral diet (6.2%, 13/211). The target calorie of CCI group was 104.6 (87.9, 125.5) kJ·kg(-1)·d(-1), and the actual calorie intake accounted for 0.98 (0.80, 1.00) of the target calory. In the non-CCI group, the target calorie was 104.6 (87.9, 125.5) kJ·kg(-1)·d(-1), and the actual calorie consumed accounted for 0.91 (0.66, 1.00) of the target calorie. There was no statistically significant difference between two groups (P=0.248, P=0.150). Conclusion: The prevalence of CCI and surgery-related CCI in ICU is high, along with severe complications, respiratory and renal dysfunction and mechanical ventilation. Surgical patients admitted to ICU are at high nutritional risk, and active and correct nutritional support is essential for such patients.
Collapse
Affiliation(s)
- S S Li
- Research Institute of General Surgery, East War Zone Hospital of PLA, Nanjing 210002, China
| | - J Wu
- Department of General Surgery, The Affiliated BenQ Hospital, Nanjing Medical University, Nanjing 210019, China
| | - X Y Yu
- Department of Critical Care Medicine, The First Affiliated Hospital, Xinjiang Medical University, Urumqi 830054, China
| | - S M Luo
- Department of Emergency Trauma Surgery, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi 830001, China
| | - J Z Wang
- Department of Gastrointestinal Surgery, The First Affiliated Hospital, Gannan Medical College, Jiangxi Ganzhou 341000, China
| | - L Luo
- Department of Critical Care Medicine, Wuxi Second People's Hospital, Jiangsu Wuxi 214002, China
| | - X S Zheng
- Department of General Surgery, Nanyang Central Hospital, Henan Nanyang 473000, China
| | - X N Han
- Department of Critical Care Medicine, Affiliated Hospital, Qingdao University, Shandong Qingdao 266555, China
| | - G Y Li
- Department of General Surgery, Hunan Provincial People's Hospital, Changsha 410000, China
| | - Y J Chen
- Department of Critical Care Medicine, Jinjiang Hospital of Traditional Chinese Medicine, Fujian Quanzhou 362200, China
| | - C T Wang
- Department of Critical Care Medicine, Shandong Provincial Hospital Affiliated of Shandong First Medical University, Jinan 250021, China
| | - L Huang
- Department of Critical Care Medicine, Yantai Mountain Hospital, Shandong Yantai 264000, China
| | - Q J Zeng
- Department of Gastrointestinal Surgery, The First People's Hospital of Yueyang City, Hunan Yueyang 414000, China
| | - X W Wu
- Research Institute of General Surgery, East War Zone Hospital of PLA, Nanjing 210002, China
| | - J A Ren
- Research Institute of General Surgery, East War Zone Hospital of PLA, Nanjing 210002, China
| |
Collapse
|
25
|
Li ST, Young TH, Wang CT, Huang TW. Chitosan films promote formation of olfactory neurospheres and differentiation of olfactory receptor neurons. Rhinology 2019; 56:336-342. [PMID: 30052693 DOI: 10.4193/rhin17.155] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Olfactory dysfunction significantly impairs the life quality of patients. Therefore, a model needs to be developed for anosmia. Chitosan is a biodegradable natural polysaccharide that has been widely studied for regenerative purposes in the nervous system. However, whether chitosan promotes differentiation of olfactory receptor neurons or regulates formation of neurospheres in the olfactory system remains unexplored. METHODOLOGY Olfactory neuroepithelial cells were isolated from embryonic wistar rats on day 17, and cultured on controls and chitosan films for 12 days. The effects of treatment were assessed using immunocytochemistry, quantitative polymerase chain reaction and western blots following culturing. The substrate of poly-L-lysine-co-laminin was adopted as a control. RESULTS In contrast to the flat layer on controls, olfactory neuroepithelial cells form olfactory neurospheres on chitosan films with steadily increasing diameter. The olfactory neurospheres contain basal cells, as well as immature and mature olfactory receptor neurons. The expression level of olfactory marker protein is higher on chitosan films than those on controls in gene and protein levels, and the olfactory transduction elements also express a similar trend. Mature olfactory receptor neurons are found predominantly at the periphery of the olfactory neurospheres. CONCLUSIONS Chitosan films not only facilitate formation of olfactory neurospheres, but also promote differentiation of olfactory receptor neurons. Chitosan is a potential biomaterial to establish an in vitro culture model to treat olfactory dysfunction in future.
Collapse
Affiliation(s)
- S T Li
- Institute of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, No. 1, Sec. 1 Jen-Ai Road, Taipei 100, Taiwan
| | - T H Young
- Institute of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, No. 1, Sec. 1 Jen-Ai Road, Taipei 100, Taiwan
| | - C T Wang
- Department of Otolaryngology, Far Eastern Memorial Hospital, Taipei, Taiwan
| | - T W Huang
- Department of Electrical Engineering, College of Electrical and Communication Engineering, Yuan Ze University, Taoyuan, Taiwan
| |
Collapse
|
26
|
Tsai JC, Wang CT, Chen KT. X-Ray Quiz: A 32-Year-Old Female with Abdominal Pain. HONG KONG J EMERG ME 2017. [DOI: 10.1177/102490791702400211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
| | | | - KT Chen
- Taipei Medical University, Department of Emergency Medicine, Taipei, Taiwan
| |
Collapse
|
27
|
Lu CS, Shieh GS, Wang CT, Su BH, Su YC, Chen YC, Su WC, Wu P, Yang WH, Shiau AL, Wu CL. Chemotherapeutics-induced Oct4 expression contributes to drug resistance and tumor recurrence in bladder cancer. Oncotarget 2017; 8:30844-30858. [PMID: 27244887 PMCID: PMC5458172 DOI: 10.18632/oncotarget.9602] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2015] [Accepted: 04/23/2016] [Indexed: 12/18/2022] Open
Abstract
Cancer cells initially characterized as sensitive to chemotherapy may acquire resistance to chemotherapy and lead to tumor recurrence through the expansion of drug-resistant population. Acquisition of drug resistance to conventional chemotherapy is a major obstacle in the treatment of recurrent cancer. Here we investigated whether anticancer drugs induced Oct4 expression, thereby contributing to acquired drug resistance and tumor recurrence in bladder cancer. We identified a positive correlation of Oct4 expression with tumor recurrence in 122 clinical specimens of superficial high-grade (stages T1-2) bladder transitional cell carcinoma (TCC). Increased Oct4 levels in bladder tumors were associated with short recurrence-free intervals in the patients. Chemotherapy induced Oct4 expression in bladder cancer cells. Notably, treatment with cisplatin increased CD44-positive bladder cancer cells expressing Oct4, representing cancer stem-like cell subpopulation. Forced expression of Oct4 reduced, whereas knockdown of Oct4 enhanced, drug sensitivity in bladder cancer cells. Furthermore, tumor cells overexpressing Oct4 responded poorly to cisplatin in vivo. In regard to clinical relevance, inhibition of Oct4 by all-trans retinoic acid (ATRA) synergistically increased sensitivity to cisplatin in bladder cancer cells. Furthermore, the combination of cisplatin and ATRA was superior to cisplatin alone in suppressing tumor growth. Therefore, our results provide evidence that Oct4 increases drug resistance and implicate that inhibition of Oct4 may be a therapeutic strategy to circumvent drug resistance.
Collapse
Affiliation(s)
- Chia-Sing Lu
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Gia-Shing Shieh
- Department of Urology, Tainan Hospital, Ministry of Health and Welfare, Executive Yuan, Tainan, Taiwan
| | - Chung-Teng Wang
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Bing-Hua Su
- Department of Biochemistry and Molecular Biology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Yu-Chu Su
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Yi-Cheng Chen
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Wu-Chou Su
- Department of Internal Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Pensee Wu
- Institute for Science & Technology in Medicine, Keele University, Keele, United Kingdom
| | - Wen-Horng Yang
- Department of Urology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Ai-Li Shiau
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Chao-Liang Wu
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Department of Biochemistry and Molecular Biology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| |
Collapse
|
28
|
Wu HW, Sun L, Li DM, Jing H, Xu B, Wang CT, Zhang L. [Endovascular repair of primary retrograde Stanford type A aortic dissection]. Zhonghua Wai Ke Za Zhi 2016; 54:761-765. [PMID: 27686640 DOI: 10.3760/cma.j.issn.0529-5815.2016.10.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To summarize the short- and mid-term results on endovascular repair of primary retrograde Stanford type A aortic dissection with an entry tear in distal aortic arch or descending aorta. Methods: Between December 2009 and December 2014, 21 male patients of primary retrograde Stanford type A aortic dissection with a mean age of (52±9) years received endovascular repair in Department of Cardiothoracic Surgery, Jinling Hospital. Among the 21 cases, 17 patients were presented as ascending aortic intramural hematoma, 4 patients as active blood flow in false lumen and partial thrombosis, 8 patients as ulcer on descending aorta combined intramural hematoma in descending aorta, and 13 patients as typical dissection changes. All patients received endovascular stent-graft repair successfully, with 15 cases in acute phase and 6 cases in chronic phase. Results: Cone stent was implanted in 13 cases, while straight stent in 8 cases, including 1 case of left common carotid-left subclavian artery bypass surgery and 1 case of restrictive bare-metal stent implantation. No perioperative stroke, paraplegia, stent fracture or displacement, limbs or abdominal organ ischemia or other severe complications occured, except for tracheotomy in 2 patients. Active blood flow in ascending aorta or aortic arch disappeared, and intramural hematoma started being absorbed on CT angiography images before discharge. All patients were alive during follow-up (6 to 72 months), and intramural hematoma in ascending aorta and aortic arch was absorbed thoroughly. Type Ⅰ endoleak and ulcer expansion were found in 1 patient, and type Ⅳ endoleak in distal stent was found in another one patient. Secondary ascending aortic dissection was found in 1 case two years later, which was cured by hybrid procedure with cardiopulmonary bypass. Conclusion: Endovascular repair of primary retrograde Stanford type A aortic dissection was safe and effective, which correlated with favorable short- and mid-term results.
Collapse
Affiliation(s)
- H W Wu
- Department of Cardiothoracic Surgery, Jinling Hospital, Clinical Medicine School of Nanjing University, Nanjing 210002, China
| | | | | | | | | | | | | |
Collapse
|
29
|
Abstract
Hepatitis B virus genotype C (HBV/C) has the largest number of subgenotypes (C1-C16) that vary with geography and isolates. HBV/C prevails in Southeast Asia (C1, C5-C16), East Asia (C2), Oceania (C3), and Australia (C4). Suitable reference strains for different subgenotypes could greatly facilitate research into HBV/C, but unfortunately they are scarce. We retrieved 974 HBV/C full-length sequences from the GenBank database and subgenotyped them by phylogenetic analysis. Reference sequences of each subgenotype from different locations were established with the most frequent nucleotide present at each position of the isolates that belonged to the same subgenotype. The reference sequences of subgenotypes C1, C2, C5, and C6 have been constructed and deposited in GenBank (KM999990-KM999993). The homology between the reference sequences and almost all the isolates belonging to the corresponding subgenotype was higher than 96%. Similarly, bootstrap values in phylogenetic trees supported clustering of reference strains with isolates belonging to the same subgenotypes. Moreover, both homology and phylogeny analyses showed that reference sequences had significant heterogeneity with isolates from other genotypes and subgenotypes. Sequence analysis further revealed that the mutation rate in the basal core promoter (BCP) region was extremely high in HBV/C2, relatively high in HBV/C1, but lower in HBV/C5 and HBV/C6. Mutations in the pre-core (Pre-C) region were common in HBV/C but the mutation rate was lower than in the BCP. HBV/ C5 has the oldest ancestral age, followed by C6, which is much more ancient than C1 and C2. This study successfully established references for HBV/C subgenotypes.
Collapse
Affiliation(s)
- H L Zhu
- Virology Laboratory, Department of Infectious Diseases, The First Affiliated Hospital, Anhui Medical University, Hefei, Anhui, China
| | - C T Wang
- Virology Laboratory, Department of Infectious Diseases, The First Affiliated Hospital, Anhui Medical University, Hefei, Anhui, China
| | - J B Xia
- Virology Laboratory, Department of Clinical Laboratory, Hubei Province Maternal and Child Health Hospital, Wuhan, Hubei, China
| | - X Li
- Virology Laboratory, Department of Infectious Diseases, The First Affiliated Hospital, Anhui Medical University, Hefei, Anhui, China
| | - Z H Zhang
- Virology Laboratory, Department of Infectious Diseases, The First Affiliated Hospital, Anhui Medical University, Hefei, Anhui, China
| |
Collapse
|
30
|
Abstract
The voltage-dependent anion channel (VDAC), also known as a mitochondrial porin, plays an important role in the regulation of metabolic and energetic functions of mitochondria, as well as in mitochondria-mediated apoptosis. Cytoplasmic male sterility (CMS) is of major economic importance for commercial hybrid production and a research model for the interaction be-tween nuclear and cytoplasmic genomes. Recent research has revealed that CMS is associated with programmed cell death. Here, we used the Honglian (HL)-CMS line of rice (Oryza sativa) as material to investigate the association of O. sativa VDAC (OsVDAC) expression to CMS. Eight VDACs were extracted from rice in this study. Bioinformatic analysis of the rice VDACs was conducted at the DNA, cDNA, and protein level. Expression patterns of OsVDACs were analyzed in different organs and during different stages of pollen development using sterile line YuetaiA (YTA), and its maintainer line YuetaiB (YTB). Differential expression of OsVDACs between YTA and YTB was observed, suggesting that VDACs may be involved in the formation of HL-CMS.
Collapse
Affiliation(s)
- X Xu
- Key Laboratory of State Ethnic Affairs Commission for Biological Technology, College of Life Science, South-Central University for Nationalities, Wuhan, China
| | - Y P Tan
- Key Laboratory of State Ethnic Affairs Commission for Biological Technology, College of Life Science, South-Central University for Nationalities, Wuhan, China
| | - G Cheng
- Key Laboratory of State Ethnic Affairs Commission for Biological Technology, College of Life Science, South-Central University for Nationalities, Wuhan, China
| | - X Q Liu
- Key Laboratory of State Ethnic Affairs Commission for Biological Technology, College of Life Science, South-Central University for Nationalities, Wuhan, China
| | - C J Xia
- Key Laboratory of State Ethnic Affairs Commission for Biological Technology, College of Life Science, South-Central University for Nationalities, Wuhan, China
| | - F Y Luo
- Key Laboratory of State Ethnic Affairs Commission for Biological Technology, College of Life Science, South-Central University for Nationalities, Wuhan, China
| | - C T Wang
- Key Laboratory of State Ethnic Affairs Commission for Biological Technology, College of Life Science, South-Central University for Nationalities, Wuhan, China
| |
Collapse
|
31
|
Wei M, Wang CT, Li DM, Song XJ. Prolonged use of fondaparinux for perioperative bridging: a case report of a patient with mechanical heart valve and heparin-induced thrombocytopenia. J Clin Pharm Ther 2015; 40:702-5. [PMID: 26573868 DOI: 10.1111/jcpt.12333] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Accepted: 10/08/2015] [Indexed: 11/28/2022]
Abstract
WHAT IS KNOWN AND OBJECTIVES Current guidelines provide no recommendations on perioperative bridging for patients after mechanical heart valve replacement (MHVR) who also have a history of heparin-induced thrombocytopenia (HIT). We present a successful case of prolonged bridging with fondaparinux in a 69-year-old Chinese woman. CASE SUMMARY The patient presented to our department with the aim for radical resection of oesophageal cancer. Fondaparinux has been administered alone at 2·5 mg subcutaneously once daily for 24 days during the interruption of warfarin perioperatively. There were no signs or symptoms of thromboembolic or bleeding throughout and after her hospitalization. WHAT IS NEW AND CONCLUSION Fondaparinux may offer an option for management of the patients with MHVR who cannot use heparin products, but further clinical investigations are warranted.
Collapse
Affiliation(s)
- M Wei
- Department of Pharmacy, Jinling Hospital, Nanjing, Jiangsu, China
| | - C T Wang
- Department of Cardio-thoracic Surgery, Jinling Hospital, Nanjing, Jiangsu, China
| | - D M Li
- Department of Cardio-thoracic Surgery, Jinling Hospital, Nanjing, Jiangsu, China
| | - X J Song
- Department of Pharmacy, Jinling Hospital, Nanjing, Jiangsu, China
| |
Collapse
|
32
|
Abstract
Sepsis is a major cause of morbidity and mortality in critically ill patients. The sepsis syndrome results from a dysregulated inflammatory response to infection that leads to multiple-organ failure, but the underlying mechanisms remain poorly understood. More and more reports show that microRNAs (miRNAs) play an important role in sepsis. In the progression of this syndrome, cells change their behavior in response to cytokines stimulated by sepsis, such as interleukin-10 (IL-10). IL-10 can activate JAK2-STAT3 in the cells to protect them from damage. miR-29a is a potential miRNA directly targeting STAT3. In this study, we investigate the role of miR-29a in targeting STAT3 during sepsis. When cells were treated with IL-10, STAT3 was activated in monocytes, as determined using western blotting. It was verified that STAT3 was a new target gene of miR-29a. miR-29a could inhibit IL-10-induced cytokine release by targeting JAK-STAT3 in monocytes. In conclusion, this study demonstrates for the first time that miR-29a inhibits STAT3 in human monocytes during sepsis.
Collapse
Affiliation(s)
- X Song
- Department of ICU, Shengli Hospital of Shandong University, Shandong, China
| | - C T Wang
- Department of ICU, Shengli Hospital of Shandong University, Shandong, China
| | - X H Geng
- Department of ICU, Dong E People's Hospital, Shandong, China
| |
Collapse
|
33
|
Chang CM, Fang KM, Huang TW, Wang CT, Cheng PW. Three-dimensional analysis of the surface registration accuracy of electromagnetic navigation systems in live endoscopic sinus surgery. Rhinology 2013; 51:343-8. [PMID: 24260767 DOI: 10.4193/rhino12.165] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Studies on the performance of surface registration with electromagnetic tracking systems are lacking in both live surgery and the laboratory setting. This study presents the efficiency in time of the system preparation as well as the navigational accuracy of surface registration using electromagnetic tracking systems. METHODOLOGY Forty patients with bilateral chronic paranasal pansinusitis underwent endoscopic sinus surgery after undergoing sinus computed tomography scans. The surgeries were performed under electromagnetic navigation guidance after the surface registration had been carried out on all of the patients. The intraoperative measurements indicate the time taken for equipment set-up, surface registration and surgical procedure, as well as the degree of navigation error along 3 axes. RESULTS The time taken for equipment set-up, surface registration and the surgical procedure was 179 +- 23 seconds, 39 +- 4.8 seconds and 114 +- 36 minutes, respectively. A comparison of the navigation error along the 3 axes showed that the deviation in the medial-lateral direction was significantly less than that in the anterior-posterior and cranial-caudal directions. CONCLUSION The procedures of equipment set-up and surface registration in electromagnetic navigation tracking are efficient, convenient and easy to manipulate. The system accuracy is within the acceptable ranges, especially on the medial-lateral axis.
Collapse
|
34
|
|
35
|
Ma TL, Wang CT, Hwang JC. Recurrent peritonitis episodes in a continuous ambulatory peritoneal dialysis patient after gynecologic procedures. Perit Dial Int 2012; 32:113-4. [PMID: 22302931 DOI: 10.3747/pdi.2011.00038] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
36
|
McLaughlin AC, Herbette L, Blasie JK, Wang CT, Hymel L, Fleischer S. P NMR Studies of Oriented Multilayers Formed from Isolated Sarcoplasmic Reticulum and Reconstituted Sarcoplasmic Reticulum: Evidence that "Boundary-Layer" Phospholipid is not Immobilized. Biophys J 2010; 37:49-50. [PMID: 19431495 DOI: 10.1016/s0006-3495(82)84593-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
|
37
|
Zhang P, Wang CT, Yan F, Gou L, Tong AP, Cai F, Li Q, Deng HX, Wei YQ. Prokaryotic expression of a novel mouse pro-apoptosis protein PNAS-4 and application of its polyclonal antibodies. Braz J Med Biol Res 2009; 41:504-11. [PMID: 18622494 DOI: 10.1590/s0100-879x2008000600012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2008] [Accepted: 05/26/2008] [Indexed: 02/05/2023] Open
Abstract
Mouse PNAS-4 (mPNAS-4) has 96% identity with human PNAS-4 (hPNAS-4) in primary sequence and has been reported to be involved in the apoptotic response to DNA damage. However, there have been no studies reported of the biological functions of mPNAS-4. In studies conducted by our group (unpublished data), it was interesting to note that overexpression of mPNAS-4 promoted apoptotic death in Lewis lung carcinoma cells (LL2) and colon carcinoma cells (CT26) of mice both in vitro and in vivo. In our studies, mPNAS-4 was cloned into the pGEX-6P-1 vector with GST tag at N-terminal in Escherichia coli strain BL21(DE3). The soluble and insoluble expression of recombinant protein mPNAS-4 (rmPNAS-4) was temperature-dependent. The majority of rmPNAS-4 was insoluble at 37 degrees C, while it was almost exclusively expressed in soluble form at 20 degrees C. The soluble rmPNAS-4 was purified by one-step affinity purification, using a glutathione Sepharose 4B column. The rmPNAS-4 protein was further identified by electrospray ionization-mass spectrometry analysis. The search parameters of the parent and fragment mass error tolerance were set at 0.1 and 0.05 kDa, respectively, and the sequence coverage of search result was 28%. The purified rmPNAS-4 was further used as immunogen to raise polyclonal antibodies in New Zealand white rabbit, which were suitable to detect both the recombinant and the endogenous mPNAS-4 in mouse brain tissue and LL2 cells after immunoblotting and/or immunostaining. The purified rmPNAS-4 and our prepared anti-mPNAS-4 polyclonal antibodies may provide useful tools for future biological function studies for mPNAS.
Collapse
Affiliation(s)
- P Zhang
- State Key Laboratory of Biotherapy, West China Hospital, West China Medical School, Sichuan University, Chengdu, Sichuan, China
| | | | | | | | | | | | | | | | | |
Collapse
|
38
|
Wang CT, Kulesha ID, Stefko PL, Wang SS. Solid phase synthesis of pentagastrin and other peptide amides by a modified technique. Int J Pept Protein Res 2009; 6:59-64. [PMID: 4415808 DOI: 10.1111/j.1399-3011.1974.tb02361.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
|
39
|
Lin YT, Wang CT, Lee JH, Chu CY, Tsao WC, Yang YH, Chiang BL. Higher Bcl-2 levels decrease staphylococcal superantigen-induced apoptosis of CD4+ T cells in atopic dermatitis. Allergy 2007; 62:520-6. [PMID: 17313401 DOI: 10.1111/j.1398-9995.2006.01297.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
BACKGROUND Staphylococcal superantigens (SsAgs) contribute to the persistence of allergic skin inflammation in atopic dermatitis (AD). The aims of this study were to (1) determine whether there are differences between AD patients and healthy subjects in SsAg-induced caspase-3 activation and SsAg-induced changes of anti-apoptotic protein Bcl-2 and Bcl-2 mRNA levels of CD4+ T cells; (2) investigate the effect of interleukin (IL)-4 on SsAg-induced caspase-3 activation and SsAg-induced changes of Bcl-2 and Bcl-2 mRNA levels of CD4+ T cells. METHODS Using immunofluorescence staining followed by flow cytometric analysis and real-time PCR, we analyzed peripheral blood mononuclear cells with or without staphylococcal enterotoxin B (SEB) stimulation in the presence or absence of recombinant IL-4 or anti-IL-4 neutralizing antibodies in 16 AD patients and 14 healthy subjects. RESULTS SEB-reactive (TCRVbeta3+, Vbeta12+, and Vbeta17+) CD4+ T cells from AD patients were more resistant to SEB-induced caspase-3 activation and SEB-induced decrease of Bcl-2 and Bcl-2 mRNA than those from healthy subjects. Exogenously added IL-4 inhibited SEB-induced caspase-3 activation and SEB-induced decrease of Bcl-2 and Bcl-2 mRNA in SEB-reactive CD4+ T cells from healthy subjects. Inhibition of endogenous IL-4 by using anti-IL-4 neutralizing antibodies up-regulated SEB-induced caspase-3 activation and SEB-induced decrease of Bcl-2 and Bcl-2 mRNA in SEB-reactive CD4+ T cells from AD patients. CONCLUSIONS Following SsAg stimulation, IL-4 produced by T cells in AD patients down-regulates SsAg-induced caspase-3 activation and apoptosis of CD4+ T cells through inhibiting the decrease of Bcl-2. This may impair deletion of SsAg-activated T cells and resolution of allergic skin inflammation.
Collapse
Affiliation(s)
- Y T Lin
- Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan
| | | | | | | | | | | | | |
Collapse
|
40
|
Abstract
X-ray fluoroscopic images have been widely used in orthopedic surgery. Unfortunately, the inherent distortion deteriorates the quality of fluoroscopic image. To avoid the discontinuities of local correction techniques and achieve good accuracy in present global correction method, a novel approach for distortion correction is proposed which allows good image quality in relatively acceptable time by combining both global and local methods, and a new local interpolation method is also proposed. Computer simulation and experimental test on fluoroscopic image have been carried out.
Collapse
Affiliation(s)
- W Q Zhang
- Deartment of Computer Science & Engineering., Fudan University, Shanghai, China
| | | | | |
Collapse
|
41
|
Wang CT, Peters-Golden M, Loch-Caruso R. A calcium-independent phospholipase activity insensitive to bromoenol lactone mediates arachidonic acid release by lindane in rat myometrial cells. Life Sci 2001; 70:453-70. [PMID: 11798014 DOI: 10.1016/s0024-3205(01)01426-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Arachidonic acid release is an important regulatory component of uterine contraction and parturition, and previous studies showed that lindane stimulates arachidonic acid release from myometrium. The present study partially characterized the enzyme activity responsible for lindane-induced arachidonic acid release in myometrial cells. Lindane released arachidonic acid from cultured rat myometrial cells in concentration- and time-dependent manners. This release was primarily from phosphatidylcholine and phosphatidylinositol, and was independent of intracellular and extracellular calcium. In cells prelabeled with [3H]arachidonic acid, 85% of radiolabel was recovered as free arachidonate and only 5% was recovered as eicosanoids. Pretreatment with the antioxidants Cu, Zn-superoxide dismutase, alpha-tocopherol or Trolox did not significantly modify lindane-induced arachidonic acid release. Pretreatment of cells with the phosphatidylcholine-specific phospholipase C inhibitor D609, phosphatidylinositol-specific phospholipase C inhibitor ET-18-OCH3, or an interrupter of the phospholipase D pathway (ethanol) did not suppress lindane-induced arachidonic acid release. Although these results are consistent with calcium-independent phospholipase A2 activation by lindane, the calcium-independent phospholipase A2 inhibitor bromoenol lactone failed to inhibit lindane-induced arachidonic acid release in myometrial cells, even though bromoenol lactone effectively blocked arachidonic acid release in neutrophils. These results suggest that myometrial cells express a novel, previously unidentified phospholipase that is arachidonate-specific, calcium-independent, insensitive to bromoenol lactone, insensitive to reactive oxygen species activation, shows substrate preference for phosphatidylcholine and phosphatidylinositol, and is stimulated by lindane. Moreover, the data show that the overwhelming majority of arachidonic acid released remains as arachidonate, but that lindane does not significantly inhibit metabolism of arachidonate to eicosanoids.
Collapse
Affiliation(s)
- C T Wang
- Department of Environmental Health Sciences, University of Michigan, Ann Arbor 48109, USA
| | | | | |
Collapse
|
42
|
Wang CT, Grishanin R, Earles CA, Chang PY, Martin TF, Chapman ER, Jackson MB. Synaptotagmin modulation of fusion pore kinetics in regulated exocytosis of dense-core vesicles. Science 2001; 294:1111-5. [PMID: 11691996 DOI: 10.1126/science.1064002] [Citation(s) in RCA: 243] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
In the exocytosis of neurotransmitter, fusion pore opening represents the first instant of fluid contact between the vesicle lumen and extracellular space. The existence of the fusion pore has been established by electrical measurements, but its molecular composition is unknown. The possibility that synaptotagmin regulates fusion pores was investigated with amperometry to monitor exocytosis of single dense-core vesicles. Overexpression of synaptotagmin I prolonged the time from fusion pore opening to dilation, whereas synaptotagmin IV shortened this time. Both synaptotagmin isoforms reduced norepinephrine flux through open fusion pores. Thus, synaptotagmin interacts with fusion pores, possibly by associating with a core complex of membrane proteins and/or lipid.
Collapse
Affiliation(s)
- C T Wang
- Department of Physiology, University of Wisconsin Medical School, University of Wisconsin, Madison, WI 53706, USA
| | | | | | | | | | | | | |
Collapse
|
43
|
Liu YY, Wong-Riley MT, Liu HL, Jia Y, Jiao XY, Wang CT, You SW, Ju G. Increase in cytochrome oxidase activity in regenerating nerve fibers of hemitransected spinal cord in the rat. Neuroreport 2001; 12:3239-42. [PMID: 11711863 DOI: 10.1097/00001756-200110290-00019] [Citation(s) in RCA: 245] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
We explored the possibility of cytochrome oxidase (CO) involvement in spinal cord regeneration in adult rats. The spinal cord was hemitransected at T9. After one month's survival, the animals were deeply anesthetized and perfused. The spinal cord segments including the lesion site were removed and sectioned horizontally for CO histochemistry. Under light microscope, a substantial number of CO-reactive nerve fibers and boutons were identified in the lateral funiculus adjacent to the lesion site. Under electron microscope, moderately to highly CO-reactive mitochondria could be seen within nerve fibers and boutons. Synaptic contacts were identified among them. The increase in CO activity in nerve fibers and boutons may indicate their high-energy demand for synaptic and spontaneous activity following spinal cord hemisection.
Collapse
Affiliation(s)
- Y Y Liu
- Institute of Neurosciences, The Fourth Military Medical University, 17 Chang Le Xi Road, Xi'an 710032, China
| | | | | | | | | | | | | | | |
Collapse
|
44
|
Wang CT, Huang ZJ, He CF, Bi CL, Shen YZ. [Detection of the wheat salt-tolerant-mutant using PCR-SSCP combining with direct sequenceing]. Yi Chuan Xue Bao 2001; 28:852-5. [PMID: 11582745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
gf-2.8 is a gene located on the chromosomal homologous group 4, which was reported to have relationship with salt tolerance of wheat. A pair of primers were designed to amplify the coding region of gf-2.8 in the two salt-tolerant mutants and their parents. Agarose gel electrophoresis showed that the 685 bp band was amplified among all the materials. SSCP analysis suggested that 974915 (one of the mutants) was different from the other materials. The sequencing results showed that Jimai 24 and its salt-tolerant mutant 8901-17 had the same sequence as published, which indicated that the mutation site of 8901-17 was not on the gf-2.8 gene. However, there were at least two single base mutations in the gf-2.8 of 974915, one of which caused the alternation of amino acid, this mutation occurred in the conservative region of gf-2.8.
Collapse
Affiliation(s)
- C T Wang
- Hebei Normal University, Life and Science Department, Shijiazhuang 050016, China
| | | | | | | | | |
Collapse
|
45
|
Chen SS, Lee SF, Wang CT. Cellular membrane-binding ability of the C-terminal cytoplasmic domain of human immunodeficiency virus type 1 envelope transmembrane protein gp41. J Virol 2001; 75:9925-38. [PMID: 11559825 PMCID: PMC114564 DOI: 10.1128/jvi.75.20.9925-9938.2001] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The amphipathic alpha-helices located in the cytoplasmic tail of the envelope (Env) transmembrane glycoprotein gp41 of human immunodeficiency virus type 1 have been implicated in membrane association and cytopathicity. Deletion of the last 12 amino acids in the C terminus of this domain severely impairs infectivity. However, the nature of the involvement of the cytoplasmic tail in Env-membrane interactions in cells and the molecular basis for the defect in infectivity of this mutant virus are still poorly understood. In this study we examined the interaction of the cytoplasmic tail with membranes in living mammalian cells by expressing a recombinant cytoplasmic tail fragment and an Escherichia coli beta-galactosidase/cytoplasmic tail fusion protein, both of them lacking gp120, the gp41 ectodomain, and the transmembrane region. We found through cell fractionation, in vivo membrane flotation, and confocal immunofluorescence studies that the cytoplasmic tail contained determinants to be routed to a perinuclear membrane region in cells. Further mapping showed that each of the three lentivirus lytic peptide (LLP-1, LLP-2, and LLP-3) sequences conferred this cellular membrane-targeting ability. Deletion of the last 12 amino acids from the C terminus abolished the ability of the LLP-1 motif to bind to membranes. High salt extraction, in vitro transcription and translation, and posttranslational membrane binding analyses indicated that the beta-galactosidase/LLP fusion proteins were inserted into membranes via the LLP sequences. Subcellular fractionation and confocal microscopy studies revealed that each of the LLP motifs, acting in a position-independent manner, targeted non-endoplasmic reticulum (ER)-associated beta-galactosidase and enhanced green fluorescence protein to the ER. Our study provides a basis for the involvement of the gp41 cytoplasmic tail during Env maturation and also supports the notion that the membrane apposition of the C-terminal cytoplasmic tail plays a crucial role in virus-host interaction.
Collapse
Affiliation(s)
- S S Chen
- Division of Infectious Diseases, Institute of Biomedical Sciences, Academia Sinica, Taipei 11529, Taiwan, Republic of China.
| | | | | |
Collapse
|
46
|
Abstract
In order to identify arsenic as one of the major factors that cause Blackfoot disease on the southwest coast of Taiwan, an atomic absorption spectrophotometric method was used to determine arsenic, selenium and iron concentrations in the tissue of plantar digital arteries. Samples from 31 patients with Blackfoot disease and 30 controls with road traffic accident or occupational injuries were studied. The results indicate that the arterial tissue from Blackfoot disease patients had higher arsenic concentration (3.06+/-1.42 microg/g) than that from healthy controls (0.59+/-0.28 microg/g). The variability was very large 418% at p<0.001. It was also noted that the concentrations of selenium (1.23+/-0.41 microg/g and 1.05+/-0.13 microg/g in patients and controls respectively; with variability 17.1%) and iron (72.7+/-34.9 microg/g and 35.2+/-16.5 microg/g in patients and controls respectively; with variability 106.5%) were both higher than those of controls. However, only the iron concentration was significantly different (p<0.05).
Collapse
Affiliation(s)
- C T Wang
- Mackeys College of Nursing, Peitou, Taiwan, ROC.
| | | |
Collapse
|
47
|
Poivey JP, Cheng YS, Rouvier R, Tai C, Wang CT, Liu HL. Genetic parameters of reproductive traits in Brown Tsaiya ducks artificially inseminated with semen from Muscovy drakes. Poult Sci 2001; 80:703-9. [PMID: 11441835 DOI: 10.1093/ps/80.6.703] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
A selection experiment on maximum duration of fertility of Brown Tsaiya ducks after artificial insemination (AI) with pooled Muscovy semen has been conducted since 1992. The Brown Tsaiya ducks were divided into two lines: a control line (T) with no selection and a selected line (S). The traits measured were the number of eggs set that were laid from Days 2 to 15 after one AI (NES), the number of fertile eggs at candling (NEF), the total number of dead embryos (NED), the maximum duration of fertility (MD), and the number of hatched mule ducklings (NEH). The selected trait was NEF. Six generations with a total of 2,127 females were measured. The variance components were estimated for each line in a multiple-trait animal model, using the restricted maximum likelihood (REML) methodology, which yields estimates free of bias caused by selection and inbreeding. Estimates of the heritability and genetic correlation from the two lines were very similar. Heritabilities in the S and T lines, respectively, were 0.14 and 0.10 for NES, 0.30 and 0.26 for NEF, 0.06 and 0.09 for NED, 0.28 and 0.21 for MD, and 0.18 and 0.19 for NEH. High and favorable genetic correlations existed between NEF and MD (0.96 and 0.92), between NEF and NEH (0.86 and 0.91), and between MD and NEH (0.90 and 0.82). The results suggested that selection for NEF could improve the maximum duration of fertility, but it could be useful to check the estimates of genetic parameters in a meat-type female duck.
Collapse
Affiliation(s)
- J P Poivey
- Institut National de la Recherche Agronomique, Station d'Amélioration Génétique des Animaux, Castanet-Tolosan, France
| | | | | | | | | | | |
Collapse
|
48
|
Abstract
A gene (AtTRP1) encoding a telomeric repeat-binding protein has been isolated from Arabidopsis thaliana. AtTRP1 is a single copy gene located on chromosome 5 of A. thaliana. The protein AtTRP1 encoded by this gene is not only homologous to the Myb DNA-binding motifs of other telomere-binding proteins but also is similar to several initiator-binding proteins in plants. Gel retardation assay revealed that the 115 residues on the C terminus of this protein, including the Myb motif, are sufficient for binding to the double-stranded plant telomeric sequence. The isolated DNA-binding domain of AtTRP1 recognizes each telomeric repeat centered on the sequence GGTTTAG. The almost full-length protein of AtTRP1 does not form any complex at all with the DNA fragments carrying four or fewer GGTTTAG repeats. However, it forms a complex with the sequence (GGTTTAG)(8) more efficiently than with the sequence (GGTTTAG)(5). These data suggest that the minimum length of a telomeric DNA for AtTRP1 binding consists of five GGTTTAG repeats and that the optimal AtTRP1 binding may require eight or more GGTTTAG repeats. It also implies that this protein AtTRP1 may bind in vivo primarily to the ends of plant chromosomes, which consist of long stretches of telomeric repeats.
Collapse
Affiliation(s)
- C M Chen
- Institute of Botany, Academia Sinica, Taipei 115, Taiwan
| | | | | |
Collapse
|
49
|
Lin BS, Chang CC, Wang CT. Renormalization group analysis for thermal turbulent transport. Phys Rev E Stat Nonlin Soft Matter Phys 2001; 63:016304. [PMID: 11304350 DOI: 10.1103/physreve.63.016304] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2000] [Indexed: 05/23/2023]
Abstract
In this study, we continue with our previous renormalization group analysis of incompressible turbulence, aiming at determination of various thermal transport properties. In particular, the temperature field T is considered a passive scalar. The quasinormal approximation is assumed for the statistical correlation between the velocity and temperature fields. A differential argument leads to derivation of the turbulent Prandtl number Pr(t) as a function of the turbulent Peclet Pe(t) number, which in turn depends on the turbulent eddy viscosity nu(t). The functional relationship between Pr(t) and Pe(t) is comparable to that of Yakhot et al. [Int. J. Heat Mass Transf. 30, 15 (1987)] and is in close consistency with direct-numerical-simulation results as well as measured data from experiments. The study proceeds further with limiting the operation of renormalization group analysis, yielding an inhomogeneous ordinary differential equation for an invariant thermal eddy diffusivity sigma. Simplicity of the equation renders itself a closed-form solution of sigma as a function of the wave number k, which, when combined with a modified Batchelor's energy spectrum for the passive temperature T, facilitates determination of the Batchelor constant C(B) and a parallel Smagorinsky model and the model constant C(P) for thermal turbulent energy transport.
Collapse
Affiliation(s)
- B S Lin
- Institute of Applied Mechanics, College of Engineering, National Taiwan University, Taipei 10764, Taiwan, Republic of China
| | | | | |
Collapse
|
50
|
Wang CT, Chen SS, Chiang CC. Assembly and release of human immunodeficiency virus type 1 Gag proteins containing tandem repeats of the matrix protein coding sequences in the matrix domain. Virology 2000; 278:289-98. [PMID: 11112503 DOI: 10.1006/viro.2000.0655] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We have constructed human immunodeficiency virus (HIV) gag mutants by increasing the matrix protein (MA) sequences via tandemly repeated duplication of the central 107-MA codons. Instead of a total of 132 amino acid residues for the wild-type MA, the resultant mutants designated as MA2, MA3, and MA4 contained a total of 242, 352, and 462 codons in the MA domains, respectively. Analysis indicated that the addition of 110 or 220 amino acid residues to the MA did not significantly affect the assembly, release, and processing of particles; however, particle production was markedly reduced when another copy of 110 residues was added to the MA. Subcellular fractionation analysis suggested that the MA tandem repeat mutations enhanced the Gag membrane affinity, in a manner which correlated with the copy number of MA sequences. The effects of enhanced membrane affinity were substantially reduced when sequences downstream of the capsid (CA) domain were deleted. Sucrose density gradient fractionation analysis showed that particles produced by the large insertion mutants possessed wild-type (wt) HIV particle density. Truncation of sequences downstream of the nucleocapsid (NC) domains of the mutants did not influence the budding of particles. In contrast, particle budding was severely impaired when sequences downstream of the CA domain were truncated. Particle densities for the large Gag proteins, which were truncated at the C-terminus of CA, were about 1.12-1.14 g/ml lower than that for wt. Our results suggest that the HIV MA domain could adopt insertions of large protein sequences, and strongly support the proposal that the NC and p2 domains play a crucial role in the process of correct Gag protein packing.
Collapse
Affiliation(s)
- C T Wang
- Department of Medical Research and Education, Institute of Clinical Medicine, Taipei, Taiwan
| | | | | |
Collapse
|