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Gao X, Bian J, Luo J, Guo K, Xiang Y, Liu H, Ding J. Radiomics-based distinction of small (≤2 cm) hepatocellular carcinoma and precancerous lesions based on unenhanced MRI. Clin Radiol 2024; 79:e659-e664. [PMID: 38341345 DOI: 10.1016/j.crad.2024.01.019] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 12/08/2023] [Accepted: 01/12/2024] [Indexed: 02/12/2024]
Abstract
AIM To assess the feasibility of a radiomics model based on unenhanced magnetic resonance imaging (MRI) to differentiate small hepatocellular carcinoma (S-HCC) (≤2 cm) and pre-hepatocellular carcinoma (Pre-HCC). MATERIALS AND METHODS One hundred and fourteen histopathologically confirmed 114 hepatic nodules were analysed retrospectively. All patients had undergone MRI before surgery using a 3 T MRI system. Each nodule was segmented on unenhanced MRI sequences (T1-weighted imaging [T1] and T2WI with fat-suppression [FS-T2]). Radiomics features were extracted and the optimal features were selected using the least absolute shrinkage and selection operator (LASSO). The support vector machine (SVM) was used to establish the radiomics model. One abdominal radiologist performed the conventional qualitative analysis for classification of S-HCC and Pre-HCC. The diagnostic performances of the radiomics and radiologist models were evaluated using receiver operating characteristic (ROC) analysis. RESULT Radiomics features (n=1,223) were extracted from each sequence and the optimal features were selected from T1, FS-T2, and T1+FS-T2 to construct the radiomics models. The radiomics model based on T1+FS-T2 showed the best performance among the three models, with areas under the ROC curves (AUCs) of 0.95 (95 % confidence interval [CI], 0.875-0.986) and 0.942 (95 % CI, 0.775-0.985), accuracies of 86 % and 88.5 %, sensitivities of 94.12 % and 100 %, and specificities of 85.48 % and 85.19 %, respectively. The radiomics model on FS-T2 showed better performance on a single sequence than that of the T1-based model. The diagnostic performance for the radiomic model was significantly higher than that for the radiologist (AUC = 0.518, p<0.05). CONCLUSION This study suggested that a radiomics model based on unenhanced MRI may serve as a feasible and non-invasive tool to classify S-HCC and Pre-HCC.
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Affiliation(s)
- X Gao
- Department of Radiology, The Second Affiliated Hospital of Dalian Medical University, No. 467 Zhongshan Road, Shahekou District, Dalian, Liaoning, China.
| | - J Bian
- Department of Radiology, The Second Affiliated Hospital of Dalian Medical University, No. 467 Zhongshan Road, Shahekou District, Dalian, Liaoning, China
| | - J Luo
- Department of Radiology, The Second Affiliated Hospital of Dalian Medical University, No. 467 Zhongshan Road, Shahekou District, Dalian, Liaoning, China
| | - K Guo
- Department of Pathology, The Second Affiliated Hospital of Dalian Medical University, No. 467 Zhongshan Road, Shahekou District, Dalian, Liaoning, China
| | - Y Xiang
- Department of Radiology, The Second Affiliated Hospital of Dalian Medical University, No. 467 Zhongshan Road, Shahekou District, Dalian, Liaoning, China
| | - H Liu
- Yizhun Medical AI Co., Ltd, Beijing, China
| | - J Ding
- Yizhun Medical AI Co., Ltd, Beijing, China
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Wu Z, Guo K, Luo E, Wang T, Wang S, Yang Y, Zhu X, Ding R. Medical long-tailed learning for imbalanced data: Bibliometric analysis. Comput Methods Programs Biomed 2024; 247:108106. [PMID: 38452661 DOI: 10.1016/j.cmpb.2024.108106] [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: 02/15/2023] [Revised: 02/24/2024] [Accepted: 02/26/2024] [Indexed: 03/09/2024]
Abstract
BACKGROUND In the last decade, long-tail learning has become a popular research focus in deep learning applications in medicine. However, no scientometric reports have provided a systematic overview of this scientific field. We utilized bibliometric techniques to identify and analyze the literature on long-tailed learning in deep learning applications in medicine and investigate research trends, core authors, and core journals. We expanded our understanding of the primary components and principal methodologies of long-tail learning research in the medical field. METHODS Web of Science was utilized to collect all articles on long-tailed learning in medicine published until December 2023. The suitability of all retrieved titles and abstracts was evaluated. For bibliometric analysis, all numerical data were extracted. CiteSpace was used to create clustered and visual knowledge graphs based on keywords. RESULTS A total of 579 articles met the evaluation criteria. Over the last decade, the annual number of publications and citation frequency both showed significant growth, following a power-law and exponential trend, respectively. Noteworthy contributors to this field include Husanbir Singh Pannu, Fadi Thabtah, and Talha Mahboob Alam, while leading journals such as IEEE ACCESS, COMPUTERS IN BIOLOGY AND MEDICINE, IEEE TRANSACTIONS ON MEDICAL IMAGING, and COMPUTERIZED MEDICAL IMAGING AND GRAPHICS have emerged as pivotal platforms for disseminating research in this area. The core of long-tailed learning research within the medical domain is encapsulated in six principal themes: deep learning for imbalanced data, model optimization, neural networks in image analysis, data imbalance in health records, CNN in diagnostics and risk assessment, and genetic information in disease mechanisms. CONCLUSION This study summarizes recent advancements in applying long-tail learning to deep learning in medicine through bibliometric analysis and visual knowledge graphs. It explains new trends, sources, core authors, journals, and research hotspots. Although this field has shown great promise in medical deep learning research, our findings will provide pertinent and valuable insights for future research and clinical practice.
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Affiliation(s)
- Zheng Wu
- School of Information Engineering, Hunan University of Science and Engineering, Yongzhou 425199, China.
| | - Kehua Guo
- School of Computer Science and Engineering, Central South University, Changsha 410083, China.
| | - Entao Luo
- School of Information Engineering, Hunan University of Science and Engineering, Yongzhou 425199, China.
| | - Tian Wang
- BNU-UIC Institute of Artificial Intelligence and Future Networks, Beijing Normal University (BNU Zhuhai), Zhuhai, China.
| | - Shoujin Wang
- Data Science Institute, University of Technology Sydney, Sydney, Australia.
| | - Yi Yang
- Department of Computer Science, Northeastern Illinois University, Chicago, IL 60625, USA.
| | - Xiangyuan Zhu
- School of Computer Science and Engineering, Central South University, Changsha 410083, China.
| | - Rui Ding
- School of Computer Science and Engineering, Central South University, Changsha 410083, China.
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Zhang QY, Zhang LX, Han DH, Jiao XC, Zheng Z, Guo K, Yang YS. [Expression of endosialin in human hypertrophic scars and its regulation on fibroblast phenotype]. Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi 2023; 39:1168-1174. [PMID: 38129304 DOI: 10.3760/cma.j.cn501225-20231030-00154] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
Objective: To explore the expression of endosialin, i.e., CD248 in human hypertrophic scars (HSs) and its regulatory effect on the phenotype of hypertrophic scar fibroblasts (HSFs). Methods: The method of experimental research was used. From March to May, 2023, 3 pediatric patients with HS were admitted to the Department of Burns and Cutaneous Surgery of the First Affiliated Hospital of Air Force Medical University, including 2 females and 1 male, aged one year ten months to two years. The HS tissue resected during the surgery and the remaining full-thickness skin graft, i.e., normal skin tissue after full-thickness skin grafting were collected from the aforementioned pediatric patients for subsequent experiments. Using the aforementioned two types of tissue, the histological structures were observed by hematoxylin-eosin staining, collagen distribution was observed by Masson staining, and the expression of CD248 was observed and measured by immunohistochemical staining. The primary HSFs were isolated from HS tissue using explant culture technique, and the 3rd to 5th passages of HSFs were used in subsequent experiments. According to the random number table, HSFs were divided into immunoglobulin G78 (IgG78)-treated group and IgG control group, which were treated with 200 nmol/L human CD248 monoclonal antibody IgG78 and human IgG control antibody for 24 h, respectively. The mRNA expressions of collagen type Ⅰ (Col Ⅰ) and α-smooth muscle actin (α-SMA) in HSFs were measured by real-time fluorescence quantitative reverse transcription polymerase chain reaction, the protein expressions of Col Ⅰ and α-SMA in HSFs were detected by Western blotting, and the intracellular location and protein expressions of Col Ⅰ and α-SMA were detected by immunofluorescence method. The number of samples in each experiment was 3. Data were statistically analyzed with paired sample t test and independent sample t test. Results: Compared with those in normal skin tissue, the epidermis and dermis in HS tissue were significantly thicker, with massive accumulation and disordered arrangement of collagen in the dermis. The expression of CD248 in HS tissue was significantly upregulated compared with that in normal skin tissue (t=5.29, P<0.05). At post treatment hour 24, the mRNA expressions of Col Ⅰ and α-SMA of HSFs in IgG78-treated group were 0.39±0.05 and 0.56±0.09, respectively, which were significantly lower than 1.00±0.07 and 1.00±0.08 in IgG control group, respectively (with t values of 11.87 and 6.49, respectively, P values all <0.05). The protein expressions of Col Ⅰ and α-SMA of HSFs in IgG78-treated group were 0.617±0.011 and 0.67±0.14, respectively, which were significantly lower than 1.259±0.052 and 1.23±0.16 in IgG control group, respectively (with t values of 20.92 and 4.52, respectively, P values all <0.05). At post treatment hour 24, immunofluorescence staining showed that Col Ⅰ and α-SMA mainly located in the cytoplasm of HSFs in the two groups, and the protein expressions of Col Ⅰ and α-SMA of HSFs in IgG78-treated group were obviously downregulated compared with those in IgG control group. Conclusions: The expression of CD248 is significantly upregulated in human HS. Targeted blockade of CD248 can significantly inhibit the collagen synthesis by HSFs and the transdifferentiation of HSFs into myofibroblasts.
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Affiliation(s)
- Q Y Zhang
- Department of Burns and Cutaneous Surgery, Burn Center of PLA, the First Affiliated Hospital of Air Force Medical University, Xi'an 710032, China The Third Student Battalion, School of Basic Medical Sciences of Air Force Medical University, Xi'an 710032, China
| | - L X Zhang
- Department of Burns and Cutaneous Surgery, Burn Center of PLA, the First Affiliated Hospital of Air Force Medical University, Xi'an 710032, China
| | - D H Han
- Department of Urology, the First Affiliated Hospital of Air Force Medical University, Xi'an 710032, China
| | - X C Jiao
- Department of Burns and Cutaneous Surgery, Burn Center of PLA, the First Affiliated Hospital of Air Force Medical University, Xi'an 710032, China
| | - Z Zheng
- Department of Burns and Cutaneous Surgery, Burn Center of PLA, the First Affiliated Hospital of Air Force Medical University, Xi'an 710032, China
| | - K Guo
- Department of Burns and Cutaneous Surgery, Burn Center of PLA, the First Affiliated Hospital of Air Force Medical University, Xi'an 710032, China
| | - Y S Yang
- Department of Burns and Cutaneous Surgery, Burn Center of PLA, the First Affiliated Hospital of Air Force Medical University, Xi'an 710032, China
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Jiang Z, Deng Q, Huang K, Ding R, Wu Z, Huang W, Guo K, Zhao S. Using green background for dermatological images to improve deep learning-based image classification. Arch Dermatol Res 2023; 316:42. [PMID: 38091097 DOI: 10.1007/s00403-023-02734-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 08/13/2023] [Accepted: 09/16/2023] [Indexed: 12/18/2023]
Affiliation(s)
- Zixi Jiang
- Department of Dermatology, Xiangya Hospital, Central South University, Changsha, China
- National Engineering Research Center of Personalized Diagnostic and Therapeutic Technology, Xiangya Hospital, Central South University, Changsha, China
- Hunan Engineering Research Center of Skin Health and Disease, Xiangya Hospital, Central South University, Changsha, China
- Hunan Key Laboratory of Skin Cancer and Psoriasis, Xiangya Hospital, Central South University, Changsha, China
- National Clinical Research Center of Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China
- Xiangya School of Medicine, Central South University, Changsha, China
| | - Qian Deng
- Department of Dermatology, Xiangya Hospital, Central South University, Changsha, China
- National Engineering Research Center of Personalized Diagnostic and Therapeutic Technology, Xiangya Hospital, Central South University, Changsha, China
- Hunan Engineering Research Center of Skin Health and Disease, Xiangya Hospital, Central South University, Changsha, China
- Hunan Key Laboratory of Skin Cancer and Psoriasis, Xiangya Hospital, Central South University, Changsha, China
- National Clinical Research Center of Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China
- Xiangya School of Medicine, Central South University, Changsha, China
| | - Kai Huang
- Department of Dermatology, Xiangya Hospital, Central South University, Changsha, China
- National Engineering Research Center of Personalized Diagnostic and Therapeutic Technology, Xiangya Hospital, Central South University, Changsha, China
- Hunan Engineering Research Center of Skin Health and Disease, Xiangya Hospital, Central South University, Changsha, China
- Hunan Key Laboratory of Skin Cancer and Psoriasis, Xiangya Hospital, Central South University, Changsha, China
- National Clinical Research Center of Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China
- Xiangya School of Medicine, Central South University, Changsha, China
| | - Rui Ding
- School of Computer Science and Engineering, Central South University, Changsha, China
| | - Zheng Wu
- School of Computer Science and Engineering, Central South University, Changsha, China
| | - Weihong Huang
- Mobile Health Ministry of Education - China Mobile Joint Laboratory, Xiangya Hospital Central South University, Changsha, China
| | - Kehua Guo
- School of Computer Science and Engineering, Central South University, Changsha, China.
| | - Shuang Zhao
- Department of Dermatology, Xiangya Hospital, Central South University, Changsha, China.
- National Engineering Research Center of Personalized Diagnostic and Therapeutic Technology, Xiangya Hospital, Central South University, Changsha, China.
- Hunan Engineering Research Center of Skin Health and Disease, Xiangya Hospital, Central South University, Changsha, China.
- Hunan Key Laboratory of Skin Cancer and Psoriasis, Xiangya Hospital, Central South University, Changsha, China.
- National Clinical Research Center of Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China.
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Guo K, Chen J, Qiu T, Guo S, Luo T, Chen T, Ren S. MedGAN: An adaptive GAN approach for medical image generation. Comput Biol Med 2023; 163:107119. [PMID: 37364533 DOI: 10.1016/j.compbiomed.2023.107119] [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: 03/02/2023] [Revised: 05/09/2023] [Accepted: 05/30/2023] [Indexed: 06/28/2023]
Abstract
Generative adversarial networks (GANs) and their variants as an effective method for generating visually appealing images have shown great potential in different medical imaging applications during past decades. However, some issues remain insufficiently investigated: many models still suffer from model collapse, vanishing gradients, and convergence failure. Considering the fact that medical images differ from typical RGB images in terms of complexity and dimensionality, we propose an adaptive generative adversarial network, namely MedGAN, to mitigate these issues. Specifically, we first use Wasserstein loss as a convergence metric to measure the convergence degree of the generator and the discriminator. Then, we adaptively train MedGAN based on this metric. Finally, we generate medical images based on MedGAN and use them to build few-shot medical data learning models for disease classification and lesion localization. On demodicosis, blister, molluscum, and parakeratosis datasets, our experimental results verify the advantages of MedGAN in model convergence, training speed, and visual quality of generated samples. We believe this approach can be generalized to other medical applications and contribute to radiologists' efforts for disease diagnosis. The source code can be downloaded at https://github.com/geyao-c/MedGAN.
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Affiliation(s)
- Kehua Guo
- School of Computer Science and Engineering, Central South University, Changsha 410083, China
| | - Jie Chen
- School of Computer Science and Engineering, Central South University, Changsha 410083, China
| | - Tian Qiu
- School of Computer Science and Engineering, Central South University, Changsha 410083, China
| | - Shaojun Guo
- National Innovation of Defense Technology, Academy of Military Sciences PLA China, Fengtai District, Beijing 100071, China.
| | - Tao Luo
- Huawei Technologies Co., Ltd, Changsha 410006, China
| | - Tianyu Chen
- School of Computer Science and Engineering, Central South University, Changsha 410083, China
| | - Sheng Ren
- School of Computer Science and Engineering, Hunan University of Arts and Sciences, Changde 415000, China
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Ren S, Guo K, Zhou X, Hu B, Zhu F, Luo E. Medical Image Super-Resolution Based on Semantic Perception Transfer Learning. IEEE/ACM Trans Comput Biol Bioinform 2023; 20:2598-2609. [PMID: 36201418 DOI: 10.1109/tcbb.2022.3212343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Medical images are an important basis for doctors to diagnose diseases, but some medical images have low resolution due to hardware technology and cost constraints. Super-resolution technology can reconstruct low-resolution medical images into high-resolution images and enhance the quality of low-resolution images, thus assisting doctors in diagnosing diseases. However, traditional super-resolution methods mainly learn the mapping relationships among modal pixels from low resolution to high resolution, lacking the learning of high-level semantic features, resulting in a lack of understanding and utilization of semantic information, such as reconstructed objects, object attributes, and spatial relationships between two objects. In this paper, we propose a medical image super-resolution method based on semantic perception transfer learning. First, we propose a novel semantic perception super-resolution method that empowers super-resolution models to perceive high-level semantics by transferring features of the image description generation network in natural language processing. Second, we construct a semantic feature extraction network and an image description generation network and comprehensively utilized image and text modal data to learn transferable, high-level semantic features. Third, we train an end-to-end, semantic perception super-resolution model by fusing dynamic perceptual convolution, a semantic extraction network, and distillation polarization self-attention. Experiments show that semantic perception transfer learning can effectively improve the quality of super-resolution reconstruction.
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Deng X, Shang X, Zhou L, Li X, Guo K, Xu M, Hou L, Hui X, Li S. Efficacy and Safety of Probiotics in Geriatric Patients with Constipation: Systematic Review and Meta-Analysis. J Nutr Health Aging 2023; 27:1140-1146. [PMID: 37997737 DOI: 10.1007/s12603-023-2028-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 07/22/2023] [Accepted: 10/01/2023] [Indexed: 11/25/2023]
Abstract
BACKGROUND Probiotics may be an effective alternative to traditional drug therapy for constipation in the elderly. OBJECTIVE To assess the efficacy and safety of probiotics in managing constipation among the elderly. METHODS Eight databases were queried for randomized controlled trials (RCTs) investigating probiotics' efficacy in addressing constipation among the elderly until January 2023. The meta-analysis was conducted employing R software version 4.2.2. The Cochrane risk of bias tool was utilized to evaluate the risk of bias, and the GRADE approach was employed to assess the credibility of the evidence concerning the efficacy of probiotics in treating constipation in older individuals. RESULTS A total of six RCTs involving 444 patients were included. Two studies were rated as low risk of bias. The meta-analysis findings revealed that probiotics, when compared to a placebo, led to an increase in stool frequency (MD = 1.02,95% CI [0.21, 2.07], p<0.05, very low quality), the probiotic group exhibited a notable impact on ameliorating symptoms associated with constipation (OR = 11.28, 95%CI [7.21, 17.64], p < 0.05, very low quality), no significant disparities were observed in terms of efforts to evacuate, manual maneuvers, and the incidence of adverse events (p>0.05). CONCLUSION The available evidence indicates a degree of uncertainty, ranging from low-to-very low, suggesting the efficacy of probiotics in augmenting bowel frequency and ameliorating constipation-related symptoms among elderly patients with constipation. Nevertheless, given the quality of the studies included, it is advisable to conduct further well-designed investigations with substantial sample sizes to substantiate the findings of this study.
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Affiliation(s)
- X Deng
- Shuangping Li, Gansu Provincial Cancer Hospital, 2 Xiaoxihu East Street, Qilihe District, Lanzhou, China. Emails:
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Qiu Z, Zhang H, Xia M, Gu J, Guo K, Wang H, Miao C. Programmed Death of Microglia in Alzheimer's Disease: Autophagy, Ferroptosis, and Pyroptosis. J Prev Alzheimers Dis 2023; 10:95-103. [PMID: 36641613 DOI: 10.14283/jpad.2023.3] [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] [Indexed: 01/03/2023]
Abstract
Alzheimer's disease (AD) is a neurodegenerative disorder characterized by progressive cognitive decline, amyloid-β (Aβ) plaques and the formation of neurofibrillary tangles (NFTs) composed of hyperphosphorylated tau. Increasing evidence has demonstrated that the damage of cell plays an important role in AD. Cell death is a critical phenomenon for physiological functions, which promotes AD pathogenesis. Programmed cell death, including necroptosis, pyroptosis, autophagy, and ferroptosis, have been discovered that have unique biological functions and pathophysiological characteristics. Here, we review the available evidence detailing the mechanisms of programmed microglial death, including pyroptosis, autophagy, and ferroptosis. We also highlight the role of programmed death of microglia during the process of AD and focus on the connection between the disease and cell death.
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Affiliation(s)
- Z Qiu
- Changhong Miao, Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, China,
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Zhou J, Wu Z, Jiang Z, Huang K, Guo K, Zhao S. Background selection schema on deep learning-based classification of dermatological disease. Comput Biol Med 2022; 149:105966. [PMID: 36029748 DOI: 10.1016/j.compbiomed.2022.105966] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [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: 06/12/2022] [Revised: 07/28/2022] [Accepted: 08/13/2022] [Indexed: 11/03/2022]
Abstract
Skin diseases are one of the most common ailments affecting humans. Artificial intelligence based on deep learning can significantly improve the efficiency of identifying skin disorders and alleviate the scarcity of medical resources. However, the distribution of background information in dermatological datasets is imbalanced, causing generalized deep learning models to perform poorly in skin disease classification. We propose a deep learning schema that combines data preprocessing, data augmentation, and residual networks to study the influence of color-based background selection on a deep model's capacity to learn foreground lesion subject attributes in a skin disease classification problem. First, clinical photographs are annotated by dermatologists, and then the original background information is masked with unique colors to generate several subsets with distinct background colors. Sample-balanced training and test sets are generated using random over/undersampling and data augmentation techniques. Finally, the deep learning networks are independently trained on diverse subsets of backdrop colors to compare the performance of classifiers based on different background information. Extensive experiments demonstrate that color-based background information significantly affects the classification of skin diseases and that classifiers trained on the green subset achieve state-of-the-art performance for classifying black and red skin lesions.
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Affiliation(s)
- Jiancun Zhou
- School of Computer Science and Engineering, Central South University, Changsha 410083, China; College of Information and Electronic Engineering, Hunan City University, Yiyang 413000, China
| | - Zheng Wu
- School of Computer Science and Engineering, Central South University, Changsha 410083, China
| | - Zixi Jiang
- Department of Dermatology, Xiangya Hospital, Central South University, Changsha, China; Hunan Engineering Research Center of Skin Health and Disease, Xiangya Hospital, Central South University, Changsha, China; Hunan Key Laboratory of Skin Cancer and Psoriasis, Xiangya Hospital, Central South University, Changsha, China; National Clinical Research Center of Geriatric Disorders, Xiangya Hospital, Central South University, China
| | - Kai Huang
- Department of Dermatology, Xiangya Hospital, Central South University, Changsha, China; Hunan Engineering Research Center of Skin Health and Disease, Xiangya Hospital, Central South University, Changsha, China; Hunan Key Laboratory of Skin Cancer and Psoriasis, Xiangya Hospital, Central South University, Changsha, China; National Clinical Research Center of Geriatric Disorders, Xiangya Hospital, Central South University, China
| | - Kehua Guo
- School of Computer Science and Engineering, Central South University, Changsha 410083, China.
| | - Shuang Zhao
- Department of Dermatology, Xiangya Hospital, Central South University, Changsha, China; Hunan Engineering Research Center of Skin Health and Disease, Xiangya Hospital, Central South University, Changsha, China; Hunan Key Laboratory of Skin Cancer and Psoriasis, Xiangya Hospital, Central South University, Changsha, China; National Clinical Research Center of Geriatric Disorders, Xiangya Hospital, Central South University, China.
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Yan C, Zhao L, Geng S, Guo K. LB1000 Potential role of cold atmospheric plasma in improving drug resistance of BRAFi/MEKi and immune checkpoint blockade agents in melanoma cells. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.05.1026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Zhang X, Che D, Guo K, Geng S. LB975 The role of gut flora metabolite butyrate in inhibiting mast cell activation via deacetylase in chronic spontaneous urticaria. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.05.998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Zhao L, Yan C, Zhang X, Jia T, Geng S, Guo K. LB1001 Effectiveness and differentially expressed genes analysis of melanoma cells treated with cold atmospheric plasma. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.05.1027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Guo K, Chen T, Ren S, Li N, Hu M, Kang J. Federated Learning Empowered Real-Time Medical Data Processing Method for Smart Healthcare. IEEE/ACM Trans Comput Biol Bioinform 2022; PP:1-12. [PMID: 35737631 DOI: 10.1109/tcbb.2022.3185395] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Computer-aided diagnosis (CAD) has always been an important research topic for applying artificial intelligence in smart healthcare. Sufficient medical data are one of the most critical factors in CAD research. However, medical data are usually obtained in chronological order and cannot be collected all at once, which poses difficulties for the application of deep learning technology in the medical field. The traditional batch learning method consumes considerable time and space resources for real-time medical data, and the incremental learning method often leads to catastrophic forgetting. To solve these problems, we propose a real-time medical data processing method based on federated learning. We divide the process into the model stage and the exemplar stage. In the model stage, we use the federated learning method to fuse the old and new models to mitigate the catastrophic forgetting problem of the new model. In the exemplar stage, we use the most representative exemplars selected from the old data to help the new model review the old knowledge, which further mitigates the catastrophic forgetting problem of the new model. We use this method to conduct experiments on a simulated medical real-time data stream. The experimental results show that our method can learn a disease diagnosis model from a continuous medical real-time data stream. As the amount of data increases, the performance of the disease diagnosis model continues to improve, and the catastrophic forgetting problem has been effectively mitigated. Compared with the traditional batch learning method, our method can significantly save time and space resources.
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Du H, Gao X, Chen Z, Guo K, Li M. A new approach for contralateral C7 nerve transfer via retrospinal route. Hand Surg Rehabil 2022; 41:171-175. [PMID: 35033731 DOI: 10.1016/j.hansur.2021.12.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 12/15/2021] [Accepted: 12/31/2021] [Indexed: 11/16/2022]
Abstract
Anterior and posterior approaches exist for the treatment of spinal pathologies. Anatomically, the 7th cervical spinal nerve(C7)crosses the C6-C7 intervertebral foramen bilaterally, allowing contralateral prevertebral or posterior C7 nerve transfer to be used. The advantage of the posterior rather than the anterior spinal approach is that it does not require retraction of important blood vessels, nerves, or other structures. In this paper, we describe transfer of the contralateral C7 nerve using a posterior approach.
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Affiliation(s)
- H Du
- Department of Neurosurgery, Binzhou Medical University Hospital, No. 661, Huanghe 2(nd) Road, Binzhou City, Shandong Province, 256600, China.
| | - X Gao
- Department of Neurosurgery, Binzhou Medical University Hospital, No. 661, Huanghe 2(nd) Road, Binzhou City, Shandong Province, 256600, China
| | - Z Chen
- Department of Neurosurgery, Binzhou Medical University Hospital, No. 661, Huanghe 2(nd) Road, Binzhou City, Shandong Province, 256600, China
| | - K Guo
- Department of Neurosurgery, Binzhou Medical University Hospital, No. 661, Huanghe 2(nd) Road, Binzhou City, Shandong Province, 256600, China
| | - M Li
- Electromyography room, Binzhou Medical University Hospital, No. 661, Huanghe 2(nd) Road, Binzhou City, Shandong Province, 256600, China.
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15
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Wang K, Guo K, Ji Z, Liu Y, Chen F, Wu S, Zhang Q, Yao Y, Zhou Q. Association of Preeclampsia with Incident Dementia and Alzheimer’s Disease among Women in the Framingham Offspring Study. J Prev Alzheimers Dis 2022; 9:725-730. [DOI: 10.14283/jpad.2022.62] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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16
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Zhang Y, Lian X, Ma D, Wu L, Guo K. Male urethral diverticulum squamous cell carcinoma containing a calculus: a rare entity. Ann R Coll Surg Engl 2021; 104:e6-e8. [PMID: 34730412 DOI: 10.1308/rcsann.2021.0036] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Male urethral diverticula with calculi have a low incidence. It is extremely rare when the diverticulum accompanied with carcinoma. We report a case of diverticulum of the male urethra containing giant calculi which developed into squamous cell carcinoma. The patient initially presented with lower urinary tract symptoms and a hard, painless perineal mass. We believe that the process of diagnosis and treatment is of great significance in clinical practice.
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Affiliation(s)
- Y Zhang
- First Hospital of Jilin University, China
| | - X Lian
- First Hospital of Jilin University, China
| | - D Ma
- Qianwei Hospital of Jilin Province, China
| | - L Wu
- First Hospital of Jilin University, China
| | - K Guo
- First Hospital of Jilin University, China
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17
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Ma XH, Guo K, Dong WL, Jiang J. [Efficacy and safety of paclitaxel liposomes compared to paclitaxel combined with platinum in concurrent chemoradiotherapy for unresectable cervical carcinoma: a Meta-analysis]. Zhonghua Zhong Liu Za Zhi 2021; 43:1132-1139. [PMID: 34695906 DOI: 10.3760/cma.j.cn112152-20210422-00337] [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 explore the efficacy and safety of paclitaxel liposomes compared to paclitaxel with platinum in concurrent chemoradiotherapy for unresectable cervical carcinoma. Methods: SinoMed, CNKI, WanFang MED ONLINE, VIP, PubMed, MEDLINE, Cochrane Library, Embase and ClinicalTrials.gov were searched to collect the papers or clinical studies of paclitaxel liposomes and paclitaxel combined with platinum in concurrent chemoradiotherapy for unresectable cervical carcinoma from the inception to January 15th 2021 in Chinese and English. Two independent reviewers screened the literatures, extracted the data and assessed the bias of the included studies. Meta-analysis was performed using RevMan 5.4 and R software. Results: Totally 9 papers involving 666 patients with unresectable cervical carcinoma were included. The results of meta-analysis indicated that compared to paclitaxel combined with platinum in concurrent chemoradiotherapy for unresectable cervical carcinoma, paclitaxel liposomes combined with platinum exhibited superiority in near-term efficacy (complete response + partial response) [81.4%(272/334) vs 68.7%(228/332), RR=1.19; 95% CI: 1.09, 1.29, P=0.000 1]; substantially decreased the incidence rates of blood system disorders [myelosuppressio, 50.3%(168/334)vs 65.1%(216/332)], gastrointestinal disorders [34.4%(115/334) vs 55.1%(183/332)], alopecia [42.2%(94/223)vs 63.3%(140/221)], allergic reaction [11.6% (23/198)vs 27.6%(54/196), P≤0.000 1], peripheral neuritis [43.0%(52/121) vs 54.9%(67/122)], or joint and muscle pain [20.3%(16/79) vs 34.6%(28/81), P<0.050 0]. Conclusion: Compared to paclitaxel combined with platinum in concurrent chemoradiotherapy for unresectable cervical carcinoma, paclitaxel liposomes is superior in near-term efficacy, and exhibits better safety.
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Affiliation(s)
- X H Ma
- Department of Gynecology and Obstetrics, Qilu Hospital of Shandong University, Jinan 250063, China
| | - K Guo
- Department of Gynecology and Obstetrics, Qilu Hospital of Shandong University, Jinan 250063, China
| | - W L Dong
- Department of Data Science and Big Data Statistics, School of Statistics, Renmin University of China, Beijing 100872, China
| | - J Jiang
- Department of Gynecology and Obstetrics, Qilu Hospital of Shandong University, Jinan 250063, China
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18
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Ren S, Guo K, Ma J, Zhu F, Hu B, Zhou H. Realistic medical image super-resolution with pyramidal feature multi-distillation networks for intelligent healthcare systems. Neural Comput Appl 2021; 35:1-16. [PMID: 34248289 PMCID: PMC8255340 DOI: 10.1007/s00521-021-06287-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 06/26/2021] [Indexed: 11/27/2022]
Abstract
There are two key requirements for medical lesion image super-resolution reconstruction in intelligent healthcare systems: clarity and reality. Because only clear and real super-resolution medical images can effectively help doctors observe the lesions of the disease. The existing super-resolution methods based on pixel space optimization often lack high-frequency details which result in blurred detail features and unclear visual perception. Also, the super-resolution methods based on feature space optimization usually have artifacts or structural deformation in the generated image. This paper proposes a novel pyramidal feature multi-distillation network for super-resolution reconstruction of medical images in intelligent healthcare systems. Firstly, we design a multi-distillation block that combines pyramidal convolution and shallow residual block. Secondly, we construct a two-branch super-resolution network to optimize the visual perception quality of the super-resolution branch by fusing the information of the gradient map branch. Finally, we combine contextual loss and L1 loss in the gradient map branch to optimize the quality of visual perception and design the information entropy contrast-aware channel attention to give different weights to the feature map. Besides, we use an arbitrary scale upsampler to achieve super-resolution reconstruction at any scale factor. The experimental results show that the proposed super-resolution reconstruction method achieves superior performance compared to other methods in this work.
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Affiliation(s)
- Sheng Ren
- School of Computer Science and Engineering, Central South University, Changsha, 410083 China
- School of Computer and Electrical Engineering, Hunan University of Arts and Science, Changde, 415000 China
| | - Kehua Guo
- School of Computer Science and Engineering, Central South University, Changsha, 410083 China
| | - Jianguang Ma
- Institute of Systems Engineering, Academy of Military Sciences, People’s Liberation Army, Beijing, 100000 China
| | - Feihong Zhu
- School of Computer Science and Engineering, Central South University, Changsha, 410083 China
| | - Bin Hu
- School of Computer Science and Engineering, Central South University, Changsha, 410083 China
| | - Haoming Zhou
- Donald Bren School of Information and Computer Sciences, University of California, Irvine, CA 92604 USA
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19
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Richardson G, Kichenadasse G, Ganju V, Xu J, Van H, Kong P, Yang F, Wei Y, Lu Y, Guo K, Donato L, Xu T, Coward J. MA06.09 Preliminary Safety, Efficacy Results of KN046 (Bispecific Anti-PD-L1/CTLA4) in Subjects With Rare Thoracic Tumors. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.179] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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20
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Zeng F, Deng G, Cui Y, Zhang Y, Dai M, Chen L, Han D, Li W, Guo K, Chen X, Shen M, Pan P. A predictive model for the severity of COVID-19 in elderly patients. Aging (Albany NY) 2020; 12:20982-20996. [PMID: 33170150 PMCID: PMC7695402 DOI: 10.18632/aging.103980] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 08/15/2020] [Indexed: 01/08/2023]
Abstract
Elderly patients with coronavirus disease 2019 (COVID-19) are more likely to develop severe or critical pneumonia, with a high fatality rate. To date, there is no model to predict the severity of COVID-19 in elderly patients. In this study, patients who maintained a non-severe condition and patients who progressed to severe or critical COVID-19 during hospitalization were assigned to the non-severe and severe groups, respectively. Based on the admission data of these two groups in the training cohort, albumin (odds ratio [OR] = 0.871, 95% confidence interval [CI]: 0.809 - 0.937, P < 0.001), d-dimer (OR = 1.289, 95% CI: 1.042 - 1.594, P = 0.019) and onset to hospitalization time (OR = 0.935, 95% CI: 0.895 - 0.977, P = 0.003) were identified as significant predictors for the severity of COVID-19 in elderly patients. By combining these predictors, an effective risk nomogram was established for accurate individualized assessment of the severity of COVID-19 in elderly patients. The concordance index of the nomogram was 0.800 in the training cohort and 0.774 in the validation cohort. The calibration curve demonstrated excellent consistency between the prediction of our nomogram and the observed curve. Decision curve analysis further showed that our nomogram conferred significantly high clinical net benefit. Collectively, our nomogram will facilitate early appropriate supportive care and better use of medical resources and finally reduce the poor outcomes of elderly COVID-19 patients.
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Affiliation(s)
- Furong Zeng
- Department of Dermatology, Xiangya Hospital, Central South University, Changsha, China.,National Clinical Research Center for Geriatric Disorders, Changsha, China.,Hunan Engineering Research Center of Skin Health and Disease, Changsha, China.,Hunan Key Laboratory of Skin Cancer and Psoriasis, Changsha, China
| | - Guangtong Deng
- Department of Dermatology, Xiangya Hospital, Central South University, Changsha, China.,National Clinical Research Center for Geriatric Disorders, Changsha, China.,Hunan Engineering Research Center of Skin Health and Disease, Changsha, China.,Hunan Key Laboratory of Skin Cancer and Psoriasis, Changsha, China
| | - Yanhui Cui
- Department of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha, China
| | - Yan Zhang
- Department of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha, China
| | - Minhui Dai
- Department of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha, China
| | - Lingli Chen
- Department of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha, China
| | - Duoduo Han
- Department of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha, China
| | - Wen Li
- Department of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha, China
| | - Kehua Guo
- School of Computer Science and Engineering, Central South University, Changsha, China
| | - Xiang Chen
- Department of Dermatology, Xiangya Hospital, Central South University, Changsha, China.,National Clinical Research Center for Geriatric Disorders, Changsha, China.,Hunan Engineering Research Center of Skin Health and Disease, Changsha, China.,Hunan Key Laboratory of Skin Cancer and Psoriasis, Changsha, China
| | - Minxue Shen
- Department of Dermatology, Xiangya Hospital, Central South University, Changsha, China.,National Clinical Research Center for Geriatric Disorders, Changsha, China.,Hunan Engineering Research Center of Skin Health and Disease, Changsha, China.,Hunan Key Laboratory of Skin Cancer and Psoriasis, Changsha, China.,Department of Social Medicine and Health Management, Xiangya School of Public Health, Central South University, Changsha, China
| | - Pinhua Pan
- Department of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha, China
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21
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Pacheco-Barcia V, France T, Asselah J, Mondejar R, Zogopoulos G, Serrano R, Donnay O, Rogado J, Del Campo L, Martinez E, Martin E, Arlanzon C, Ochoa P, Guo K, Barrena G, Colomer Bosch R. 153P The Systemic Inflammation Response Index (SIRI) is a prognostic factor that correlates with tumor burden in advanced pancreatic cancer. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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22
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Pacheco-Barcia V, Mondejar R, France T, Asselah J, Donnay O, Zogopoulos G, Bouganim N, Guo K, Martin E, Alcindor T, Colomer Bosch R. A systemic inflammation response index (SIRI) correlates with survival and could be a predictive factor for mFOLFIRINOX in metastatic pancreatic cancer (PC). Ann Oncol 2019. [DOI: 10.1093/annonc/mdz239.053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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23
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Wu Z, Zhong M, Li M, Huang H, Liao J, Lu A, Guo K, Ma N, Lin J, Duan J, Liu L, Xu F, Zhong Z, Chen J. Mutation Analysis of Pre-mRNA Splicing Genes PRPF31, PRPF8, and SNRNP200 in Chinese Families with Autosomal Dominant Retinitis Pigmentosa. Curr Mol Med 2019; 18:287-294. [PMID: 30360737 DOI: 10.2174/1566524018666181024160452] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 08/04/2018] [Revised: 09/28/2018] [Accepted: 09/28/2018] [Indexed: 11/22/2022]
Abstract
BACKGROUND To screen variants in pre-mRNA Splicing genes in 95 Chinese autosomal dominant retinitis pigmentosa (adRP) families. METHODS Clinical examination and pedigree analysis were performed. Targeted exome sequencing (TES) and / or Sanger sequencing were performed to detect the variants in genes of Splicing factors and conduct intra-familiar segregation analysis with DNA available. In silico analysis was performed to predict pathogenicity of variants in protein level and in vitro splicing assays were performed to compare splicing variants with their corresponding wildtype about their splicing effect. RESULTS In this study, total nine different variants were identified in PRPF31, SNRNP200, and PRPF8 respectively, including six PRPF31 variants [five novel variants 322+1G>A, c.527+2T>G, c.590T>C(p.Leu197Pro), c.1035_1036insGC (p.Pro346Argfs X18), and c.1224dupG (p.Gln409AlafsX66) plus one reported variant c.1060C>T (p.Arg354X)], a recurrent PRPF8 variant c.6930G>T (p.Arg2310Ser), two SNRNP200 variants [one heterozygous and homozygous SNRNP200 recurrent variant c.3260G>A (p.Ser1087Leu), and a reported heterozygous c.2042G>A(p.Arg681His)]. In family 20009, incomplete penetrance was observed. A novel PRPF31 missense variant c.590T>C (p.Leu197Pro) was predicted to be pathogenic in protein level via in silico analysis and in vitro splicing assay demonstrated that two novel splicing PRPF31 variants c.322+1G>A and c.527+2T>G affect splicing compared with the wildtype. CONCLUSIONS In our studies, RP-causing variants of pre-mRNA Splicing genes (PRPF31, PRPF8 and SNRNP200) were identified in nine of the ninety-five adRP families respectively, which extend the spectra of RP variant and phenotype. And we provide the first example that SNRNP200-related RP can be caused by both heterozygous and homozygous variants of this gene.
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Affiliation(s)
- Z Wu
- Department of Ophthalmology of Shanghai Tenth People's Hospital, and Tongji Eye Institute, Tongji University School of Medicine, Shanghai, China.,Department of Medical Genetics, Tongji University School of Medicine, Shanghai, China
| | - M Zhong
- Department of Ophthalmology of Pingxiang People's Hospital, Pingxiang, Jiangxi, China
| | - M Li
- Department of Ophthalmology of The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi, China
| | - H Huang
- Department of Ophthalmology of The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi, China
| | - J Liao
- Department of Ophthalmology of Shanghai Tenth People's Hospital, and Tongji Eye Institute, Tongji University School of Medicine, Shanghai, China.,Department of Medical Genetics, Tongji University School of Medicine, Shanghai, China
| | - A Lu
- Department of Bioinformatics, School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - K Guo
- Department of Ophthalmology of Shanghai Tenth People's Hospital, and Tongji Eye Institute, Tongji University School of Medicine, Shanghai, China.,Department of Medical Genetics, Tongji University School of Medicine, Shanghai, China
| | - N Ma
- Department of Ophthalmology of Shanghai Tenth People's Hospital, and Tongji Eye Institute, Tongji University School of Medicine, Shanghai, China.,Department of Medical Genetics, Tongji University School of Medicine, Shanghai, China
| | - J Lin
- Department of Ophthalmology of Shanghai Tenth People's Hospital, and Tongji Eye Institute, Tongji University School of Medicine, Shanghai, China.,Department of Medical Genetics, Tongji University School of Medicine, Shanghai, China
| | - J Duan
- Maternity and Child Health Care Hospital, Jiujiang, Jiangxi Province, China
| | - L Liu
- Department of Ophthalmology of The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi, China
| | - F Xu
- Department of Ophthalmology of The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi, China
| | - Z Zhong
- Department of Ophthalmology of Shanghai Tenth People's Hospital, and Tongji Eye Institute, Tongji University School of Medicine, Shanghai, China.,Department of Medical Genetics, Tongji University School of Medicine, Shanghai, China
| | - J Chen
- Department of Ophthalmology of Shanghai Tenth People's Hospital, and Tongji Eye Institute, Tongji University School of Medicine, Shanghai, China.,Department of Medical Genetics, Tongji University School of Medicine, Shanghai, China
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24
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Elzinga S, Murdock BJ, Guo K, Hayes JM, Tabbey MA, Hur J, Feldman EL. Toll-like receptors and inflammation in metabolic neuropathy; a role in early versus late disease? Exp Neurol 2019; 320:112967. [PMID: 31145897 DOI: 10.1016/j.expneurol.2019.112967] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [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: 03/31/2019] [Revised: 05/24/2019] [Accepted: 05/26/2019] [Indexed: 02/07/2023]
Abstract
Neuropathy is a common, morbid complication of the metabolic syndrome, prediabetes, and diabetes. Recent studies have indicated a potential role for the immune system in the development of neuropathy. In particular, toll-like receptors (TLR) 2 and 4 have been linked to metabolic dysfunction, and blocking TLR4 is proposed as a treatment for neuropathic pain. In the current study, we investigated the role of the immune system, particularly TLRs 2 and 4, in the pathogenesis and progression of neuropathy. Sural or sciatic nerve gene expression arrays from humans and murine neuropathy models of prediabetes and diabetes were first analyzed to identify differentially expressed TLR2- and TLR4-associated genes within the KEGG (Kyoto Encyclopedia of Genes and Genomes) database. We observed that genes associated with TLRs 2 and 4, particularly lipopolysaccharide binding protein (LPB) and phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit beta (PIK3CB), were dysregulated across species and across multiple murine models of prediabetic and diabetic neuropathy. To further understand the role of these pathways in vivo, TLR 2 and 4 global knockout mice placed on a 60% high fat diet (HFD-TLR2/4-/-) were compared with wild type (WT) mice on a high fat diet (HFD-WT) and WT controls on a standard diet (CON). Mice then underwent metabolic, neuropathic, and immunological phenotyping at two time points to assess the impact of TLR signaling on neuropathy and immunity during metabolic dysfunction over time. We found that HFD-TLR2/4-/- and HFD-WT mice weighed more than CON mice but did not have increased fasting blood glucose levels. Despite normal blood glucose levels, HFD-TLR2/4-/- mice eventually developed neuropathy at the later time point (28 wks of age) but were somewhat protected from neuropathy at the early time point (16 wks of age) as measured by shorter hind paw withdraw latencies. This is in contrast to HFD-WT mice which developed neuropathy within 11 wks of being placed on a high fat diet and were neuropathic by all measures at both the early and late time points. Finally, we immunophenotyped all three mouse groups at the later time point and found differences in the number of peripheral blood Ly6C-myeloid cells as well as F4/80+ expression. These results indicate that TLR signaling influences early development of neuropathy in sensory neurons, potentially via immune modulation and recruitment.
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Affiliation(s)
- S Elzinga
- Department of Neurology, University of Michigan, Ann Arbor, MI, USA
| | - B J Murdock
- Department of Neurology, University of Michigan, Ann Arbor, MI, USA
| | - K Guo
- Department of Biomedical Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58202, USA
| | - J M Hayes
- Department of Neurology, University of Michigan, Ann Arbor, MI, USA
| | - M A Tabbey
- Department of Neurology, University of Michigan, Ann Arbor, MI, USA
| | - J Hur
- Department of Biomedical Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58202, USA
| | - E L Feldman
- Department of Neurology, University of Michigan, Ann Arbor, MI, USA.
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25
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Deng B, Zhang S, Zhang Y, Miao Y, Meng X, Guo K. Knockdown of Tripartite Motif Containing 28 suppresses the migration, invasion and epithelial-mesenchymal transition in ovarian carcinoma cells through down-regulation of Wnt/β-catenin signaling pathway. Neoplasma 2019; 64:893-900. [PMID: 28895414 DOI: 10.4149/neo_2017_611] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Tripartite motif containing 28 (TRIM28) is a transcriptional corepressor of Kruppel-associated box zinc finger protein, which has been reported to participate in carcinogenesis. Nonetheless, whether TRIM28 plays a role in the metastasis of ovarian carcinoma (OC) is unclear and requires further investigation. In this study, two OC cell lines (A2780 and OVCAR-3) with stable low expression of TRIM28 were established via RNA interference. We found that the migratory and invasive ability of TRIM28-silenced OC cells significantly decreased. The expression and activity of matrix metallopeptidase (MMP)-2 and MMP-9 in these OC cells were inhibited. The TRIM28 shRNA also suppressed the epithelial-mesenchymal transition (EMT) of OC cells as evidenced by the up-regulated E-cadherin and the downregulated Vimentin and N-cadherin. Additionally, the Wnt/β-catenin signaling pathway was suppressed in TRIM28-silenced OC cells: the activity of β-catenin was inhibited, the expression of total and nuclear β-catenin, Axin 2, T-cell factor 1 (TCF1) and lymphoid enhancer binding factor 1 (LEF1) were decreased, whereas the phosphorylation of β-catenin at Ser33/37 was enhanced. Further, re-expression of active β-catenin in TRIM28-silenced OC cells partly restored their metastasis in vitro. Taken together, our study demonstrates a contributory role of TRIM28 in OC metastasis in vitro, suggesting TRIM28 as a novel therapeutic target for this malignant tumor.
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27
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Guo K, Kasymjanova G, Wang H, Sakr L, Small D, Cohen V, Pepe C, Spatz A, Agulnik J. P1.04-16 Comparison of Clinical Response to Checkpoint Inhibitors in Advanced NSCLC with High PD-L1 Expression Tested on Cytology Versus Biopsy Samples. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.731] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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28
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Tank EM, Figueroa-Romero C, Hinder LM, Bedi K, Archbold HC, Li X, Weskamp K, Safren N, Paez-Colasante X, Pacut C, Thumma S, Paulsen MT, Guo K, Hur J, Ljungman M, Feldman EL, Barmada SJ. Abnormal RNA stability in amyotrophic lateral sclerosis. Nat Commun 2018; 9:2845. [PMID: 30030424 PMCID: PMC6054632 DOI: 10.1038/s41467-018-05049-z] [Citation(s) in RCA: 91] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Accepted: 06/11/2018] [Indexed: 12/11/2022] Open
Abstract
Amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD) share key features, including accumulation of the RNA-binding protein TDP-43. TDP-43 regulates RNA homeostasis, but it remains unclear whether RNA stability is affected in these disorders. We use Bru-seq and BruChase-seq to assess genome-wide RNA stability in ALS patient-derived cells, demonstrating profound destabilization of ribosomal and mitochondrial transcripts. This pattern is recapitulated by TDP-43 overexpression, suggesting a primary role for TDP-43 in RNA destabilization, and in postmortem samples from ALS and FTD patients. Proteomics and functional studies illustrate corresponding reductions in mitochondrial components and compensatory increases in protein synthesis. Collectively, these observations suggest that TDP-43 deposition leads to targeted RNA instability in ALS and FTD, and may ultimately cause cell death by disrupting energy production and protein synthesis pathways.
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Affiliation(s)
- E M Tank
- Department of Neurology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - C Figueroa-Romero
- Department of Neurology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - L M Hinder
- Department of Neurology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - K Bedi
- Department of Radiation Oncology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - H C Archbold
- Department of Neurology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - X Li
- Department of Neurology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - K Weskamp
- Department of Neurology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - N Safren
- Department of Neurology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - X Paez-Colasante
- Department of Neurology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - C Pacut
- Department of Neurology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - S Thumma
- Department of Neurology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - M T Paulsen
- Department of Radiation Oncology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - K Guo
- Department of Biomedical Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND, 58202, USA
| | - J Hur
- Department of Biomedical Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND, 58202, USA
| | - M Ljungman
- Department of Radiation Oncology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
- Cellular & Molecular Biology Program, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - E L Feldman
- Department of Neurology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
- Cellular & Molecular Biology Program, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
- Neuroscience Graduate Program, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - S J Barmada
- Department of Neurology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA.
- Cellular & Molecular Biology Program, University of Michigan Medical School, Ann Arbor, MI, 48109, USA.
- Neuroscience Graduate Program, University of Michigan Medical School, Ann Arbor, MI, 48109, USA.
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Pacheco-Barcia V, France T, Zogopoulos G, Bouganim N, Donnay O, Alcindor T, Solís RM, Guo K, Martin E, Colomer R, Asselah J. Gemcitabine plus nab-paclitaxel versus modified FOLFIRINOX as first line chemotherapy in metastatic pancreatic cancer: A comparison of toxicity and survival. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy151.163] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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30
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Abstract
Microporous membranes have been developed which can remove endotoxins selectively from electrolyte and albumin solutions by regioselective adsorption in the membrane matrix and outside surface of the membrane. The membranes were prepared in the form of hollow fibre membranes in a continuous process. By varying the membrane preparation parameters, different pore sizes and adsorption capacities could be realized, thus broadening applications for biological purification. Dynamic adsorption capacities for endotoxin from albumin and saline solution were determined and were found to be in the range of 0.2 and 0.1 μg endotoxin/g membrane, respectively, suggesting different adsorption mechanisms. (Int J Artif Organs 2007; 30: 589–93)
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Affiliation(s)
- C-M Bell
- Institut für Angewandte Forschung, Hochschule Reutlingen, Fakultät für Angewandte Chemie, Reutlingen, Germany.
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31
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Kong XJ, Chai QF, Guo K, Zhao YF, Wang YH. [Analysis of contrast echocardiography for detecting right to left shunt in adults with patent foramen ovale]. Zhonghua Yi Xue Za Zhi 2017; 97:3380-3383. [PMID: 29179276 DOI: 10.3760/cma.j.issn.0376-2491.2017.43.004] [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 analyze the contrast echocardiography for detecting right to left shunt in adults with patent foramen ovale(PFO), and study the relationship between PFO and cryptogenic stroke. Methods: Clinical data of forty-six adults patients with PFO diagnosed by transesophageal echocardiography(TEE)from March, 2012 to March, 2017 were retrospectively collected, and the patients were divided to 3 groups according to the direction and brightness of the color Doppler shunts: obvious left-to-right shunt (OLRS, group A), weak left-to-right shunt(WLRS, group B), bi-directional shunt(BDS, group C). A right-to-left shunt (RLS) scale was calculated using the method of 10 ml hand-operated saline for contrast echocardiography. Results: There were seventeen cases in group A, four cases (23.5%) showed RLS at level 1, and thirteen cases (76.5%) showed no RLS; there were twenty cases in group B, and all cases (100%) showed RLS, with five cases (25%) at level 1 and fifteen cases (75%) at level 2-3; there were nine cases in group C, and all cases (100%) showed RLS, with two cases (22.2%) at level 1 and seven cases (77.8%) at level 2-3. Anteroposterior diameter of left atrium of patients with no RLS (4.8 cm±0.6 cm) was significantly larger than that of patients with RLS in contrast echocardiography (3.6 cm±0.5 cm)(P=0.000). Conclusions: OLRS of adults with patent foramen ovale and with larger left atrium have less RLS than WLRS and DLRS with normal left atrium in contrast echocardiography.The possibility of paradoxical embolism in WLRS and DLRS is higher than that in OLRS, which should be taken seriously in clinical practice.
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Affiliation(s)
- X J Kong
- Department of Ultrasound, 371st Hospital of PLA, Xinxiang 453000, China
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32
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Vu-Augier de Montgrémier M, Chen J, Guo K, Moro MR. Aspects culturels et transculturels des troubles du comportement alimentaire chez des adolescentes et jeunes adultes chinoises. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.neurenf.2017.03.002] [Citation(s) in RCA: 3] [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: 11/16/2022]
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33
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34
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Guo K, Huang Y, Kuang L, Zhang Y. CASP: A Context-Aware Transparent Active Service Provision Architecture in a Mobile Internet Environment. Comput Sci Eng 2017. [DOI: 10.1109/mcse.2017.16] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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35
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Guo K, Yin G, Zi XH, Zhu HX, Pan Q. Effect of selective serotonin reuptake inhibitors on expression of 5-HT1AR and neurotransmitters in rats with vascular dementia. Genet Mol Res 2016; 15:gmr-15-04-gmr.15049031. [PMID: 27966748 DOI: 10.4238/gmr15049031] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
5-hydroxytryptamine receptor 1A (5-HT1AR) is closely associated with cognitive functions. Selective serotonin reuptake inhibitors (SSRIs) can protect individuals from brain damage following ischemia/hypoxia. To investigate the function of SSRIs in vascular dementia (VD), we established a rat model of VD, and observed the effect of SSRIs on the expression of 5-HT1AR mRNA and neurotransmitters. Male SD rats (6 months) were randomly assigned into sham, model, and SSRI groups (N = 30). VD was achieved by permanent ligation of the bilateral common carotid artery. Escitalopram, a highly selective 5-HT reabsorption inhibitor, was ip injected into the rats for three consecutive weeks. The Morris water-maze was used to test learning and memory. H&E staining for neuronal injury was conducted on cortical and hippocampal tissues. HPLC was used to determine the levels of dopamine (DA), 5-HT, and norepinephrine (NE). RT-PCR was used to determine expression of 5-HT1AR mRNA. As compared to control rats, model animals demonstrated elongated escape latency, lower platform crossing times, and significant injuries to hippocampal CA1 neurons. This was accompanied by reductions in DA, 5-HT, and NE levels in hippocampal tissues, as well as reduced cortical 5-HT and decreased 5-HT1AR mRNA expression (P < 0.05). Escitalopram treatments reduced escape latency, elevated platform crossing times, improved CA1 neuronal damage, increased DA and 5-HT levels in hippocampal and cortical neurons, as well as elevated expression of 5-HT1AR mRNA (P < 0.05). Therefore, SSRIs may improve cognitive dysfunction of VD rats, possibly by stimulating expression of neurotransmitters and protecting neurons.
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Affiliation(s)
- K Guo
- Department of Neurology, the Third Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - G Yin
- Department of Pathology, Xiangya Medical School, Central South University, Changsha, Hunan, China
| | - X H Zi
- Department of Neurology, the Third Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - H X Zhu
- Department of Neurology, the Third Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Q Pan
- Department of Obstetrics and Gynecology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China
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36
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Affiliation(s)
- H. Wang
- School of Economics and Management, Tongji University, Shanghai, China
| | - K. Guo
- School of Economics and Management, Tongji University, Shanghai, China
- School of Business, Jinggangshan University, JiAn, China
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37
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Song W, Wang B, Guo K, Zhang W. Structures and magnetic properties of Ni n (n = 36-40) clusters from first-principles calculations. J STRUCT CHEM+ 2016. [DOI: 10.1134/s0022476616050048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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38
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An J, Li Z, Dong Y, Ren J, Guo K. Methicillin-Resistant Staphylococcus Aureus infection exacerbates NSCLC cell metastasis by up-regulating TLR4/MyD88 pathway. Cell Mol Biol (Noisy-le-grand) 2016; 62:1-7. [PMID: 27545207] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Accepted: 06/28/2016] [Indexed: 06/06/2023]
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) infection is a major public health problem worldwide, which brings to a more great threat for cancer patients. It's necessary to give attentions to lung cancer combined with MRSA. This study mainly focuses on the influences of MRSA on lung cancer cells (A549). We first found that MRSA infection can enhance metastasis ability of A549 cell and increase matrix metalloproteinase (MMP2 and MMP9) expressions in MRSA-infected A549 cell. Toll-like receptors (TLRs) have been reported to play an important role in tumor cell initiation and migration, and regulate the expression of MMPs in tumors. Our further research indicates that Toll-like receptor 4 (TLR4)/molecules myeloid differentiation factor 88 (MyD88) signaling was up-regulated in MRSA-infected A549 cell. After silencing TLR4 or MyD88 gene, the enhanced metastasis ability of A549 cell by MRSA was decreased significantly; Also, MMP2 and MMP9 expression increase was reversed. In conclusion, MRSA infection can enhance NSCLC cell metastasis by up-regulating TLR4/MyD88 signaling.
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Affiliation(s)
- J An
- The Second Affiliated Hospital, School of medicine, Xi'an Jiaotong University Department of Dermatology Xi'an China
| | - Z Li
- The Second Affiliated Hospital, School of medicine, Xi'an Jiaotong University Department of Dermatology Xi'an China
| | - Y Dong
- The Second Affiliated Hospital, School of medicine, Xi'an Jiaotong University Department of Dermatology Xi'an China
| | - J Ren
- The Second Affiliated Hospital, School of medicine, Xi'an Jiaotong University Department of Dermatology Xi'an China
| | - K Guo
- The Second Affiliated Hospital, School of medicine, Xi'an Jiaotong University Department of Dermatology Xi'an China
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39
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Guo K, Zhang P, Ma J. Secure and Cost-Effective Distributed Aggregation for Mobile Sensor Networks. Sensors (Basel) 2016; 16:s16040583. [PMID: 27120599 PMCID: PMC4851097 DOI: 10.3390/s16040583] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2015] [Revised: 03/24/2016] [Accepted: 04/20/2016] [Indexed: 11/29/2022]
Abstract
Secure data aggregation (SDA) schemes are widely used in distributed applications, such as mobile sensor networks, to reduce communication cost, prolong the network life cycle and provide security. However, most SDA are only suited for a single type of statistics (i.e., summation-based or comparison-based statistics) and are not applicable to obtaining multiple statistic results. Most SDA are also inefficient for dynamic networks. This paper presents multi-functional secure data aggregation (MFSDA), in which the mapping step and coding step are introduced to provide value-preserving and order-preserving and, later, to enable arbitrary statistics support in the same query. MFSDA is suited for dynamic networks because these active nodes can be counted directly from aggregation data. The proposed scheme is tolerant to many types of attacks. The network load of the proposed scheme is balanced, and no significant bottleneck exists. The MFSDA includes two versions: MFSDA-I and MFSDA-II. The first one can obtain accurate results, while the second one is a more generalized version that can significantly reduce network traffic at the expense of less accuracy loss.
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Affiliation(s)
- Kehua Guo
- School of Information Science and Engineering, Central South University, Changsha 410083, China.
| | - Ping Zhang
- School of Information Science and Engineering, Central South University, Changsha 410083, China.
- School of Electronics and Information Engineering, Hunan University of Science and Engineering, 425199 Yongzhou, China.
| | - Jianhua Ma
- Faculty of Computer and Information Sciences, Hosei University, 184-8584 Tokyo, Japan.
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40
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Affiliation(s)
- L. Gasco
- Dipartimento di Scienze Zootecniche. Università di Torino, Italy
| | - C. Sabia
- Dipartimento di Scienze Zootecniche. Università di Torino, Italy
| | - C. Lussiana
- Dipartimento di Scienze Zootecniche. Università di Torino, Italy
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41
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Guo K, Liang Z, Liu L, Li F, Wang H. Flavonoids intake and risk of prostate cancer: a meta-analysis of observational studies. Andrologia 2016; 48:1175-1182. [PMID: 26992118 DOI: 10.1111/and.12556] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/01/2016] [Indexed: 12/20/2022] Open
Abstract
The aim of the study was to assess the association between total flavonoids/flavonoid subclasses intake and prostate cancer risk. Several databases were searched to select eligible studies with predefined criteria. Risk ratios (RRs) with 95% confidence intervals (CIs) were used as the effect size. Publication bias and sensitivity analysis were performed. A total of five studies including four prospective cohort studies and one case-control study were included in the meta-analysis. The pooled result demonstrated a significantly increased risk of prostate cancer with higher intake of total flavonoids (RR = 1.12, 95% CI: 1.02-1.23, P = 0.013). However, sensitivity analysis indicated that there lacked a significant association after removing the study of Wang et al. (RR = 1.17, 95% CI: 0.94-1.46). Subgroup analysis stratified by flavonoids subclasses found that higher intake of anthocyanidins and flavan-3-ols were significantly associated with increased prostate cancer risk (RR = 1.12, 95% CI: 1.03-1.21, P = 0.011; RR = 1.21, 95% CI: 1.10-1.32, P < 0.001). Sensitivity analysis also indicated that after removing Wang's study, no significant association between anthocyanidins intake and prostate cancer risk was detected (RR = 1.22, 95% CI: 0.97-1.54). In conclusion, higher intake of flavonoids may not be associated with prostate cancer risk.
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Affiliation(s)
- K Guo
- Department of Andrology, The First Hospital of Jilin University, Changchun, China
| | - Z Liang
- Department of Andrology, The First Hospital of Jilin University, Changchun, China
| | - L Liu
- Department of Andrology, The First Hospital of Jilin University, Changchun, China
| | - F Li
- Department of Andrology, The First Hospital of Jilin University, Changchun, China
| | - H Wang
- Department of Andrology, The First Hospital of Jilin University, Changchun, China
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Schiavone A, Guo K, Tassone S, Gasco L, Malfatto V, Zoccarato I. Use of natural extract of chestnut (Silvafeed ENC®) in broiler feeding: effect on growth performance. Italian Journal of Animal Science 2016. [DOI: 10.4081/ijas.2007.1s.731] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- A. Schiavone
- Dipartimento di Produzioni AnimaliEpidemiologia e Ecologia. Università di Torino, Italy
| | - K. Guo
- Dipartimento di Scienze ZootecnicheUniversità di Torino, Italy
| | - S. Tassone
- Dipartimento di Scienze ZootecnicheUniversità di Torino, Italy
| | - L. Gasco
- Dipartimento di Scienze ZootecnicheUniversità di Torino, Italy
| | - V. Malfatto
- Dipartimento di Scienze ZootecnicheUniversità di Torino, Italy
| | - I. Zoccarato
- Dipartimento di Scienze ZootecnicheUniversità di Torino, Italy
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43
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Wan L, Qiao K, Sun XN, Di ZC, Fang Z, Li ZJ, Guo K. Benzylation of heterocyclic N-oxides via direct oxidative cross-dehydrogenative coupling with toluene derivatives. NEW J CHEM 2016. [DOI: 10.1039/c6nj02560a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel cross-dehydrogenative coupling (CDC) of heterocyclic N-oxides with toluene derivatives has been disclosed.
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Affiliation(s)
- L. Wan
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- 30 Puzhu South Road
- Nanjing
- P. R. China
| | - K. Qiao
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- 30 Puzhu South Road
- Nanjing
- P. R. China
| | - X. N. Sun
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- 30 Puzhu South Road
- Nanjing
- P. R. China
| | - Z. C. Di
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- 30 Puzhu South Road
- Nanjing
- P. R. China
| | - Z. Fang
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- 30 Puzhu South Road
- Nanjing
- P. R. China
| | - Z. J. Li
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- 30 Puzhu South Road
- Nanjing
- P. R. China
| | - K. Guo
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- 30 Puzhu South Road
- Nanjing
- P. R. China
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44
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Li BK, Guo K, Li CY, Li HL, Zhao PP, Chen K, Liu CX. Influence of suppression of CapG gene expression by siRNA on the growth and metastasis of human prostate cancer cells. Genet Mol Res 2015; 14:15769-78. [PMID: 26634544 DOI: 10.4238/2015.december.1.28] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
This study investigated CapG gene expression in prostate cancer cell lines; in addition, we explored the effects of CapG suppression on DU145 cell growth, and the underlying mechanism with which CapG affects DU145 cell growth and invasiveness. The expression of CapG and 18 related genes in DU145 cells was analyzed by flow cytometry, quantitative polymerase chain reaction (qPCR), CCK8 assay, western blot, and the trans-well assay. DU145 cells were transfected with designed small interfering RNA (siRNA). CapG expression was quantified by qPCR and western blot. DU145 cell proliferation and invasiveness was analyzed using the CCK8, flow cytometric, and trans-well assays. CapG, TMPRSS1, EGFR, ETS-1, ERBB2, AKT, Cyclin D1, P21, Bcl-2, and Bak1 gene and Bcl-2, Cyclin D1, and CapG protein expressions were significantly lower in the siRNA group compared to the negative control group (P < 0.05). The proliferation of CapG siRNA DU145 cells was lower than that of the two control groups, 48 h after transfection. The cell inhibition rate was 24.5, 35.4, and 16,5% at 24, 48, and 72 h, respectively. The growth curve indicated that CapG siRNA DU145 cells showed a significantly slower proliferation rate (P < 0.05). The trans-well assay showed a significant decrease in the migratory and invasive capacities of DU145 cells in the siRNA group (P < 0.05). The suppression of CapG expression caused a significant decrease in the proliferation, invasiveness, and metastasis of DU145 cells. The mechanism with which CapG, with other oncogenes, influences cancer cell cycle remains to be elucidated.
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Affiliation(s)
- B K Li
- Department of Urology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - K Guo
- Department of Urology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - C Y Li
- Department of Urology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - H L Li
- Department of Urology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - P P Zhao
- Department of Urology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - K Chen
- Department of Urology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - C X Liu
- Department of Urology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China
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45
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Wang H, Liu B, Al-Aidaroos AQO, Shi H, Li L, Guo K, Li J, Tan BCP, Loo JM, Tang JP, Thura M, Zeng Q. Dual-faced SH3BGRL: oncogenic in mice, tumor suppressive in humans. Oncogene 2015; 35:3303-13. [PMID: 26455318 PMCID: PMC4929482 DOI: 10.1038/onc.2015.391] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Revised: 09/07/2015] [Accepted: 09/08/2015] [Indexed: 12/12/2022]
Abstract
Despite abundant data supporting c-Src as a metastasis-promoting oncogene, activating mutations of c-Src are rare. This suggests that trans-interacting proteins may have a critical role in regulating c-Src activation. Here, we first report the discovery of Src homology 3 (SH3) domain-binding glutamic acid-rich-like protein (SH3BGRL), a novel c-Src activator in mice. Ectopic expression of murine SH3BGRL (mSH3BGRL) strongly promoted both tumor cell invasion and lung metastasis. Molecularly, mSH3BGRL specifically bound the inactive form of c-Src phosphorylated at Tyr527, promoting Tyr416 phosphorylation of c-Src and subsequent FAK-mediated activation of ERK and AKT signaling pathways. Targeting endogenous c-Src alone was sufficient to abolish mSH3BGRL-induced cancer metastasis in vivo. Unexpectedly, human SH3BGRL (hSH3BGRL) in turn suppressed tumorigenesis and metastasis in nature. We attempted site-specific reversion of hSH3BGRL amino-acid sequence to mSH3BGRL and found V108A substitution sufficient to restore SH3BGRL function as a c-Src activator and metastasis promoter. Notably, the somatic mutation R76C of hSH3BGRL can similarly act as hSH3BGRL-V108A and mSH3BGRL in tumorigenesis and metastasis. Our results uncover an evolutionarily controversial role of SH3BGRL in driving tumor metastasis through c-Src activation, and suggests that hSH3BGRL mutation status could be relevant to cancer diagnosis and therapy.
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Affiliation(s)
- H Wang
- Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, People's Republic of China.,Center for Stem Cell Biology and Tissue Engineering, Sun Yat-Sen University, Guangzhou, People's Republic of China
| | - B Liu
- Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, People's Republic of China.,Center for Stem Cell Biology and Tissue Engineering, Sun Yat-Sen University, Guangzhou, People's Republic of China
| | - A Q O Al-Aidaroos
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), Singapore
| | - H Shi
- Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, People's Republic of China.,Center for Stem Cell Biology and Tissue Engineering, Sun Yat-Sen University, Guangzhou, People's Republic of China
| | - L Li
- Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, People's Republic of China.,Center for Stem Cell Biology and Tissue Engineering, Sun Yat-Sen University, Guangzhou, People's Republic of China
| | - K Guo
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), Singapore
| | - J Li
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), Singapore
| | - B C P Tan
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), Singapore
| | - J M Loo
- The Rockefeller University, New York, NY, USA
| | - J P Tang
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), Singapore
| | - M Thura
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), Singapore
| | - Q Zeng
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), Singapore.,Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
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46
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Teo P, Guo K, Alayoubi N, Kehler K, Pistorius S. SU-E-J-58: Comparison of Conformal Tracking Methods Using Initial, Adaptive and Preceding Image Frames for Image Registration. Med Phys 2015. [DOI: 10.1118/1.4924145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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47
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Abstract
Clouston syndrome (CS; also termed hidrotic ectodermal dysplasia) is a rare autosomal dominant genetic skin disorder, characterized by alopecia, nail dystrophy, and palmoplantar hyperkeratosis. Mutations in the GJB6 gene, which encodes the gap junction protein connexin 30, have been shown to cause this disorder. To date, four mutations of GJB6 have been found in patients with CS: G11R, V37E, D50N and A88V. Mutations in GJA1 (V41L) and GJB2 (R127H) are also related to CS. We found a novel missense mutation, N14S, in GJB6 and the previously identified F191L mutation in GJB2 (Cx26) in a proband with CS in a Han Chinese pedigree; these mutations were not found in 200 ethnically matched nonconsanguineous Han Chinese controls.
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Affiliation(s)
- Y T Liu
- Department of Dermatology, Northwest hospital, Xi'an Jiaotong University, Xi'an, China
| | - K Guo
- Department of Dermatology, Northwest hospital, Xi'an Jiaotong University, Xi'an, China
| | - J Li
- Department of Dermatology, Northwest hospital, Xi'an Jiaotong University, Xi'an, China
| | - Y Liu
- Department of Dermatology, Northwest hospital, Xi'an Jiaotong University, Xi'an, China
| | - W H Zeng
- Department of Dermatology, Northwest hospital, Xi'an Jiaotong University, Xi'an, China
| | - S M Geng
- Department of Dermatology, Northwest hospital, Xi'an Jiaotong University, Xi'an, China
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King A, Barton D, Beard HA, Than N, Moore J, Corbett C, Thomas J, Guo K, Guha I, Hollyman D, Stocken D, Yap C, Fox R, Forbes SJ, Newsome PN. REpeated AutoLogous Infusions of STem cells In Cirrhosis (REALISTIC): a multicentre, phase II, open-label, randomised controlled trial of repeated autologous infusions of granulocyte colony-stimulating factor (GCSF) mobilised CD133+ bone marrow stem cells in patients with cirrhosis. A study protocol for a randomised controlled trial. BMJ Open 2015; 5:e007700. [PMID: 25795699 PMCID: PMC4368910 DOI: 10.1136/bmjopen-2015-007700] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
INTRODUCTION Liver disease mortality and morbidity are rapidly rising and liver transplantation is limited by organ availability. Small scale human studies have shown that stem cell therapy is safe and feasible and has suggested clinical benefit. No published studies have yet examined the effect of stem cell therapy in a randomised controlled trial and evaluated the effect of repeated therapy. METHODS AND ANALYSIS Patients with liver cirrhosis will be randomised to one of three trial groups: group 1: Control group, Standard conservative management; group 2 treatment: granulocyte colony-stimulating factor (G-CSF; lenograstim) 15 µg/kg body weight daily on days 1-5; group 3 treatment: G-CSF 15 µg/kg body weight daily on days 1-5 followed by leukapheresis, isolation and aliquoting of CD133+ cells. Patients will receive an infusion of freshly isolated CD133+ cells immediately and frozen doses at days 30 and 60 via peripheral vein (0.2×10(6) cells/kg for each of the three doses). Primary objective is to demonstrate an improvement in the severity of liver disease over 3 months using either G-CSF alone or G-CSF followed by repeated infusions of haematopoietic stem cells compared with standard conservative management. The trial is powered to answer two hypotheses of each treatment compared to control but not powered to detect smaller expected differences between the two treatment groups. As such, the overall α=0.05 for the trial is split equally between the two hypotheses. Conventionally, to detect a relevant standardised effect size of 0.8 point reduction in Model for End-stage Liver Disease score using two-sided α=0.05(overall α=0.1 split equally between the two hypotheses) and 80% power requires 27 participants to be randomised per group (81 participants in total). ETHICS AND DISSEMINATION The trial is registered at Current Controlled Trials on 18 November 2009 (ISRCTN number 91288089, EuDRACT number 2009-010335-41). The findings of this trial will be disseminated to patients and through peer-reviewed publications and international presentations.
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Affiliation(s)
- A King
- NIHR Centre for Liver Research and Biomedical Research Unit, University of Birmingham, Birmingham, UK Liver Unit, University Hospital Birmingham NHS Foundation Trust, Birmingham, UK
| | - D Barton
- NIHR Liver BRU Clinical trials group (EDD), CRUK clinical trials unit, University of Birmingham, Birmingham, UK
| | - H A Beard
- NIHR Centre for Liver Research and Biomedical Research Unit, University of Birmingham, Birmingham, UK Cellular and Molecular Therapies, NHS Blood and Transplant, Birmingham, UK
| | - N Than
- NIHR Centre for Liver Research and Biomedical Research Unit, University of Birmingham, Birmingham, UK
| | - J Moore
- MRC Centre for Regenerative Medicine, University of Edinburgh, Edinburgh, UK
| | - C Corbett
- NIHR Centre for Liver Research and Biomedical Research Unit, University of Birmingham, Birmingham, UK
| | - J Thomas
- MRC Centre for Regenerative Medicine, University of Edinburgh, Edinburgh, UK
| | - K Guo
- NIHR Centre for Liver Research and Biomedical Research Unit, University of Birmingham, Birmingham, UK
| | - I Guha
- National Institute for Health Research Biomedical Research Unit in Gastrointestinal and Liver Diseases at Nottingham University Hospitals NHS Trust and the University of Nottingham, Nottingham, UK
| | - D Hollyman
- Cellular and Molecular Therapies, NHS Blood and Transplant, Birmingham, UK
| | - D Stocken
- Newcastle Clinical Trial Unit, Institute of Health and Society, Newcastle University, Newcastle, UK
| | - C Yap
- NIHR Liver BRU Clinical trials group (EDD), CRUK clinical trials unit, University of Birmingham, Birmingham, UK
| | - R Fox
- NIHR Liver BRU Clinical trials group (EDD), CRUK clinical trials unit, University of Birmingham, Birmingham, UK
| | - S J Forbes
- MRC Centre for Regenerative Medicine, University of Edinburgh, Edinburgh, UK
| | - P N Newsome
- NIHR Centre for Liver Research and Biomedical Research Unit, University of Birmingham, Birmingham, UK Liver Unit, University Hospital Birmingham NHS Foundation Trust, Birmingham, UK
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Hao N, Mu J, Hu N, Xu S, Yan M, Li Y, Guo K, Xu L. Improvement of l-citrulline production in Corynebacterium glutamicum by ornithine acetyltransferase. ACTA ACUST UNITED AC 2015; 42:307-13. [DOI: 10.1007/s10295-014-1561-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Accepted: 11/29/2014] [Indexed: 10/24/2022]
Abstract
Abstract
In this study, Corynebacterium glutamicum ATCC 13032 was engineered to produce l-citrulline through a metabolic engineering strategy. To prevent the flux away from l-citrulline and to increase the expression levels of genes involved in the citrulline biosynthesis pathway, the argininosuccinate synthase gene (argG) and the repressor gene (argR) were inactivated. The engineered C. glutamicum ATCC 13032 ∆argG ∆argR (CIT 2) produced higher amounts of l-citrulline (5.43 g/L) compared to the wildtype strain (0.15 g/L). To determine new strategies for further enhancement of l-citrulline production, the effect of l-citrulline on ornithine acetyltransferase (EC 2.3.1.35; OATase; ArgJ) was first investigated. Citrulline was determined to inhibit Ornithine acetyltransferase; for 50 % inhibition, citrulline concentration was 30 mM. The argJ gene from C. glutamicum ATCC 13032 was cloned, and the recombinant shuttle plasmid pXMJ19-argJ was constructed and expressed in C. glutamicum ATCC 13032 ∆argG ∆argR (CIT 2). Overexpression of the argJ gene exhibited increased OAT activity and resulted in a positive effect on citrulline production (8.51 g/L). These results indicate that OAT plays a vital role during l-citrulline production in C. glutamicum.
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Affiliation(s)
- N Hao
- grid.412022.7 0000000093895210 State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 30 Puzhu South Road 211816 Nanjing People’s Republic of China
| | - Jr Mu
- grid.412022.7 0000000093895210 State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 30 Puzhu South Road 211816 Nanjing People’s Republic of China
| | - N Hu
- grid.412022.7 0000000093895210 State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 30 Puzhu South Road 211816 Nanjing People’s Republic of China
| | - S Xu
- grid.412022.7 0000000093895210 State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 30 Puzhu South Road 211816 Nanjing People’s Republic of China
| | - M Yan
- grid.412022.7 0000000093895210 State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 30 Puzhu South Road 211816 Nanjing People’s Republic of China
| | - Y Li
- grid.412022.7 0000000093895210 State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 30 Puzhu South Road 211816 Nanjing People’s Republic of China
| | - K Guo
- grid.412022.7 0000000093895210 State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 30 Puzhu South Road 211816 Nanjing People’s Republic of China
| | - L Xu
- grid.412022.7 0000000093895210 State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 30 Puzhu South Road 211816 Nanjing People’s Republic of China
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Armstrong MJ, Hazlehurst JM, Hull D, Guo K, Borrows S, Yu J, Gough SC, Newsome PN, Tomlinson JW. Abdominal subcutaneous adipose tissue insulin resistance and lipolysis in patients with non-alcoholic steatohepatitis. Diabetes Obes Metab 2014; 16:651-60. [PMID: 24962805 PMCID: PMC4190688 DOI: 10.1111/dom.12272] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2013] [Revised: 01/14/2014] [Accepted: 02/06/2014] [Indexed: 12/26/2022]
Abstract
BACKGROUND Systemic insulin resistance (IR) is a primary feature in non-alcoholic steatohepatitis (NASH), however, there remain limited data on tissue-specific insulin sensitivity in vivo. METHODS We examined tissue-specific (adipose, muscle and liver) insulin sensitivity and inflammation in 16 European Caucasian patients with biopsy-confirmed NASH and in 15 healthy controls. All underwent a two-step hyperinsulinaemic euglycaemic clamp incorporating stable isotope measurements of carbohydrate and lipid metabolism with concomitant subcutaneous adipose tissue (SAT) microdialysis. RESULTS Hepatic and muscle insulin sensitivity were decreased in patients with NASH compared with controls, as demonstrated by reduced suppression of hepatic glucose production and glucose disposal (Gd) rates following insulin infusion. In addition, rates of lipolysis were higher in NASH patients with impaired insulin-mediated suppression of free fatty acid levels. At a tissue specific level, abdominal SAT in patients with NASH was severely insulin resistant, requiring >sixfold more insulin to cause ½-maximal suppression of glycerol release when compared with healthy controls. Furthermore, patients with NASH had significantly higher circulating levels of pro-inflammatory adipocytokines than controls. CONCLUSION NASH patients have profound IR in the liver, muscle and in particular adipose tissues. This study represents the first in vivo description of dysfunctional SAT in patients with NASH.
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Affiliation(s)
- M J Armstrong
- Centre for Liver Research and NIHR Liver Biomedical Research Unit, University of BirminghamBirmingham, UK
- Correspondence to: Dr Matthew J. Armstrong, Wellcome Trust Research Fellow & Hepatology Registrar, NIHR Centre for Liver Research, University of Birmingham, 5th Floor IBR, Birmingham B15 2TH, UK. E-mail:
| | - J M Hazlehurst
- Centre for Endocrinology, Diabetes and Metabolism, Institute of Biomedical Research, School of Clinical and Experimental Medicine, University of BirminghamBirmingham, UK
| | - D Hull
- Centre for Liver Research and NIHR Liver Biomedical Research Unit, University of BirminghamBirmingham, UK
| | - K Guo
- Centre for Liver Research and NIHR Liver Biomedical Research Unit, University of BirminghamBirmingham, UK
| | - S Borrows
- NIHR/Wellcome Trust Clinical Research Facility, Queen Elizabeth HospitalBirmingham, UK
| | - J Yu
- School of Sport, Exercise & Rehabilitation Sciences, University of BirminghamBirmingham, UK
| | - S C Gough
- Oxford Centre for Diabetes, Endocrinology and Metabolism, and NIHR Oxford Biomedical Research CentreOxford, UK
| | - P N Newsome
- Centre for Liver Research and NIHR Liver Biomedical Research Unit, University of BirminghamBirmingham, UK
| | - J W Tomlinson
- Centre for Endocrinology, Diabetes and Metabolism, Institute of Biomedical Research, School of Clinical and Experimental Medicine, University of BirminghamBirmingham, UK
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