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Li B, Wu K, Duan G, Yin W, Lei M, Yan Y, Ren Y, Zhang C. Folic Acid and Taurine Alleviate the Impairment of Redox Status, Immunity, Rumen Microbial Composition and Fermentation of Lambs under Heat Stress. Animals (Basel) 2024; 14:998. [PMID: 38612237 PMCID: PMC11010938 DOI: 10.3390/ani14070998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Revised: 03/14/2024] [Accepted: 03/22/2024] [Indexed: 04/14/2024] Open
Abstract
The aim of this study was to investigate if the supplementation of folic acid and taurine can relieve the adverse effects of different levels of heat stress (HS) on growth performance, physiological indices, antioxidative capacity, immunity, rumen fermentation and microbiota. A total of 24 Dorper × Hu crossbred lambs (27.51 ± 0.96 kg) were divided into four groups: control group (C, 25 °C), moderate HS group (MHS, 35 °C), severe HS group (SHS, 40 °C), and the treatment group, under severe HS (RHS, 40 °C, 4 and 40 mg/kg BW/d coated folic acid and taurine, respectively). Results showed that, compared with Group C, HS significantly decreased the ADG of lambs (p < 0.05), and the ADG in the RHS group was markedly higher than in the MHS and SHS group (p < 0.05). HS had significant detrimental effects on physiological indices, antioxidative indices and immune status on the 4th day (p < 0.05). The physiological indices, such as RR and ST, increased significantly (p < 0.05) with the HS level and were significantly decreased in the RHS group, compared to the SHS group (p < 0.05). HS induced the significant increase of MDA, TNF-α, and IL-β, and the decrease of T-AOC, SOD, GPx, IL-10, IL-13, IgA, IgG, and IgM (p < 0.05). However, there was a significant improvement in these indices after the supplementation of folic acid and taurine under HS. Moreover, there were a significant increase in Quinella and Succinivibrio, and an evident decrease of the genera Rikenellaceae_RC9_gut_group and Asteroleplasma under HS (p < 0.05). The LEfSe analysis showed that the genera Butyrivibrio, Eubacterium_ventriosum_group, and f_Bifidobacteriaceae were enriched in the MHS, SHS and RHS groups, respectively. Correlated analysis indicated that the genus Rikenellaceae_RC9_gut_group was positively associated with MDA, while it was negatively involved in IL-10, IgA, IgM, and SOD (p < 0.05); The genus Anaeroplasma was positively associated with the propionate and valerate, while the genus Succinivibrio was negatively involved in TNF-α (p < 0.05). In conclusion, folic acid and taurine may alleviate the adverse effects of HS on antioxidant capacity, immunomodulation, and rumen fermentation of lambs by inducing changes in the microbiome that improve animal growth performance.
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Affiliation(s)
| | | | | | | | | | | | - Youshe Ren
- College of Animal Science, Shanxi Agricultural University, Taiyuan 030031, China; (B.L.); (K.W.); (G.D.); (W.Y.); (M.L.); (Y.Y.)
| | - Chunxiang Zhang
- College of Animal Science, Shanxi Agricultural University, Taiyuan 030031, China; (B.L.); (K.W.); (G.D.); (W.Y.); (M.L.); (Y.Y.)
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Li B, Yin W, Lei M, Wang X, Yang Y, Zhang C, Chen Y. Exploring the digesta- and mucosa-associated microbial community dynamics in the rumen and hindgut of goats from birth to adult. Front Microbiol 2023; 14:1190348. [PMID: 37396393 PMCID: PMC10311480 DOI: 10.3389/fmicb.2023.1190348] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 05/22/2023] [Indexed: 07/04/2023] Open
Abstract
Recently, the relationship between the goat host and its gastrointestinal microbiome has emerged as a hallmark of host-microbiota symbiosis, which was indispensable for the proper physiological function that convert the plant biomass to livestock products. However, little integrative information about the establishment of gastrointestinal microflora in goats exists. Herein, we characterized the colonizing process of the bacterial community in the digesta and mucosa of the rumen, cecum, and colon of the cashmere goat from birth to adulthood to compare its spatiotemporal difference via 16S rRNA gene sequencing. A total of 1,003 genera belonging to 43 phyla were identified. Principal coordinate analysis unveiled the similarity of microbial community between or within each age group increased and gradually developed toward mature whatever in digesta or mucosa. In the rumen, the composition of the bacterial community in digesta differed significantly from in mucosa across age groups; whereas in the hindgut, there was a high similarity of bacterial composition between the in digesta and mucosa in each age group before weaning, while the bacterial community structure differed markedly between these two types of samples after weaning. Taxonomic analysis indicated that 25 and 21 core genera coexisted in digesta and mucosa of the rumen and hindgut, respectively; but their abundances differed considerably by GIT region and/or age. In digesta, as goats aged, a lower abundance of Bacillus was observed with higher abundances of Prevotella 1 and Rikenellaceae RC9 in the rumen; while in the hindgut, the genera Escherichia-Shigella, Variovorax, and Stenotrophomonas decreased and Ruminococcaceae UCG-005, Ruminococcaceae UCG-010, and Alistipes increased with age increased. In mucosa, the rumen showed microbial dynamics with increases of Butyrivibrio 2 and Prevotellaceae UCG-001 and decreases of unclassified_f_Pasteurellaceae; while the genera Treponema 2 and Ruminococcaceae UCG-010 increased and Escherichia-Shigella decreased in the hindgut as goats aged. These results shed light on the colonization process of microbiota in the rumen and hindgut, which mainly include the initial, transit, and mature phases. Furthermore, there is a significant difference in the microbial composition between in digesta and mucosa, and both these exhibit a considerable spatiotemporal specificity.
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Affiliation(s)
- Bibo Li
- College of Animal Science, Shanxi Agricultural University, Jinzhong, China
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Xianyang, China
| | - Weiqi Yin
- College of Animal Science, Shanxi Agricultural University, Jinzhong, China
| | - Mingkai Lei
- College of Animal Science, Shanxi Agricultural University, Jinzhong, China
| | - Xiaolong Wang
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Xianyang, China
| | - Yuxin Yang
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Xianyang, China
| | - Chunxiang Zhang
- College of Animal Science, Shanxi Agricultural University, Jinzhong, China
| | - Yulin Chen
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Xianyang, China
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De Felice F, Humbert-Vidan L, Lei M, King A, Guerrero Urbano T. Dynamic nomogram for long-term survival in patients with locally advanced oropharyngeal cancer after (chemo)radiotherapy. Eur Arch Otorhinolaryngol 2023; 280:1955-1961. [PMID: 36427081 DOI: 10.1007/s00405-022-07757-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Accepted: 11/19/2022] [Indexed: 11/27/2022]
Abstract
PURPOSE This study aimed to establish a nomogram for predicting overall survival (OS) in oropharyngeal cancer patients treated with curative (chemo)radiotherapy. MATERIALS AND METHODS The dynamic nomogram was constructed on 273 patients with oropharyngeal squamous cell carcinoma treated in a Tertiary Head and Neck Cancer Unit. The clinical features that were previously reported to be associated with OS were analyzed. The performance of the nomogram was assessed using concordance index (C-index) and calibration curves. RESULTS The nomogram incorporated three explanatory variables derived from a decision tree approach including HPV status, N classification according to 8th edition TNM and early response to (chemo)radiotherapy. The nomogram was capable to predict OS with a validation C-index of 0.768. The proposed stratification in risk groups allowed significant distinction between Kaplan-Meier curves for OS outcome (p < 0.0001). CONCLUSIONS The nomogram provided an accurate evaluation of OS for oropharyngeal cancer patients treated with curative (chemo)radiotherapy.
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Affiliation(s)
- Francesca De Felice
- Department of Clinical Oncology, Guy's and St Thomas' NHS Foundation Trust, London, UK. .,Department of Radiotherapy, Policlinico Umberto I, "Sapienza" University of Rome, Viale Regina Elena 326, 00161, Rome, Italy.
| | - L Humbert-Vidan
- Department of Medical Physics, Guy's and St Thomas' NHS Foundation Trust, London, UK.,School of Cancer and Pharmaceutical Sciences, Comprehensive Cancer Centre, King's College London, London, UK
| | - M Lei
- Department of Clinical Oncology, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - A King
- Department of Biomedical Engineering, King's College London, London, UK
| | - T Guerrero Urbano
- Department of Clinical Oncology, Guy's and St Thomas' NHS Foundation Trust, London, UK
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Adjogatse D, Petkar I, Reis Ferreira M, Kong A, Lei M, Thomas C, Barrington SF, Dudau C, Touska P, Guerrero Urbano T, Connor SEJ. The Impact of Interactive MRI-Based Radiologist Review on Radiotherapy Target Volume Delineation in Head and Neck Cancer. AJNR Am J Neuroradiol 2023; 44:192-198. [PMID: 36702503 PMCID: PMC9891322 DOI: 10.3174/ajnr.a7773] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Accepted: 12/31/2022] [Indexed: 01/27/2023]
Abstract
BACKGROUND AND PURPOSE Peer review of head and neck cancer radiation therapy target volumes by radiologists was introduced in our center to optimize target volume delineation. Our aim was to assess the impact of MR imaging-based radiologist peer review of head and neck radiation therapy gross tumor and nodal volumes, through qualitative and quantitative analysis. MATERIALS AND METHODS Cases undergoing radical radiation therapy with a coregistered MR imaging, between April 2019 and March 2020, were reviewed. The frequency and nature of volume changes were documented, with major changes classified as per the guidance of The Royal College of Radiologists. Volumetric alignment was assessed using the Dice similarity coefficient, Jaccard index, and Hausdorff distance. RESULTS Fifty cases were reviewed between April 2019 and March 2020. The median age was 59 years (range, 29-83 years), and 72% were men. Seventy-six percent of gross tumor volumes and 41.5% of gross nodal volumes were altered, with 54.8% of gross tumor volume and 66.6% of gross nodal volume alterations classified as "major." Undercontouring of soft-tissue involvement and unidentified lymph nodes were predominant reasons for change. Radiologist review significantly altered the size of both the gross tumor volume (P = .034) and clinical target tumor volume (P = .003), but not gross nodal volume or clinical target nodal volume. The median conformity and surface distance metrics were the following: gross tumor volume Dice similarity coefficient = 0.93 (range, 0.82-0.96), Jaccard index = 0.87 (range, 0.7-0.94), Hausdorff distance = 7.45 mm (range, 5.6-11.7 mm); and gross nodular tumor volume Dice similarity coefficient = 0.95 (0.91-0.97), Jaccard index = 0.91 (0.83-0.95), and Hausdorff distance = 20.7 mm (range, 12.6-41.6). Conformity improved on gross tumor volume-to-clinical target tumor volume expansion (Dice similarity coefficient = 0.93 versus 0.95, P = .003). CONCLUSIONS MR imaging-based radiologist review resulted in major changes to most radiotherapy target volumes and significant changes in volume size of both gross tumor volume and clinical target tumor volume, suggesting that this is a fundamental step in the radiotherapy workflow of patients with head and neck cancer.
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Affiliation(s)
- D Adjogatse
- From the Departments of Oncology (D.A., I.P., M.R.F., A.K., M.L., T.G.U.)
- School of Biomedical Engineering and Imaging Sciences (D.A., C.T., S.E.J.C.)
| | - I Petkar
- From the Departments of Oncology (D.A., I.P., M.R.F., A.K., M.L., T.G.U.)
| | - M Reis Ferreira
- From the Departments of Oncology (D.A., I.P., M.R.F., A.K., M.L., T.G.U.)
| | - A Kong
- From the Departments of Oncology (D.A., I.P., M.R.F., A.K., M.L., T.G.U.)
| | - M Lei
- From the Departments of Oncology (D.A., I.P., M.R.F., A.K., M.L., T.G.U.)
| | - C Thomas
- Medical Physics (C.T.)
- School of Biomedical Engineering and Imaging Sciences (D.A., C.T., S.E.J.C.)
| | - S F Barrington
- King's College London and Guy's and St Thomas' PET Centre (S.F.B.), School of Biomedical Engineering and Imaging Sciences, King's College London, King's Health Partners, London, UK
| | - C Dudau
- Radiology (C.D., P.T., S.E.J.C.), Guy's and St Thomas' National Health Service Foundation Trust, London, UK
- Department of Neurororadiology (C.D., S.E.J.C.), King's College Hospital, London, UK
| | - P Touska
- Radiology (C.D., P.T., S.E.J.C.), Guy's and St Thomas' National Health Service Foundation Trust, London, UK
| | - T Guerrero Urbano
- From the Departments of Oncology (D.A., I.P., M.R.F., A.K., M.L., T.G.U.)
- Faculty of Dentistry, Oral and Craniofacial Sciences (T.G.U.), King's College London, London, UK
| | - S E J Connor
- Radiology (C.D., P.T., S.E.J.C.), Guy's and St Thomas' National Health Service Foundation Trust, London, UK
- School of Biomedical Engineering and Imaging Sciences (D.A., C.T., S.E.J.C.)
- Department of Neurororadiology (C.D., S.E.J.C.), King's College Hospital, London, UK
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Feng L, Zheng Y, Liu Y, Zhao Y, Lei M, Li Z, Fu S. Hair Zinc and Chromium Levels Were Associated with a Reduced Likelihood of Age Related Cognitive Decline in Centenarians and Oldest-Old Adults. J Nutr Health Aging 2023; 27:1012-1017. [PMID: 37997723 DOI: 10.1007/s12603-023-2008-8] [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: 07/13/2023] [Accepted: 09/27/2023] [Indexed: 11/25/2023]
Abstract
BACKGROUND Cognitive function has inevitable decline with advancing age in nature, and age-related cognitive decline (ARCD) is of increasing concern to aging population. Scarce study has involved the associations between hair trace elements and ARCD in older adults, especially in centenarians and oldest-old adults. This study was to investigate the associations between hair trace elements and ARCD in centenarians and oldest-old adults. METHODS Based on the household registration information of centenarians and oldest-old adults provided by the Civil Affairs Department of Hainan Province, China, the investigators conducted a one-to-one household survey among centenarians (≥100 years old) and oldest-old adults (80-99 years old). All 50 centenarians had a median age of 103 years and females accounted for 68.0%. All 73 oldest-old adults aged 80-99 years had a median age of 90 years and females accounted for 82.2%. Basic information were obtained with questionnaire interview, physical examination, biological test and hair collection by pre-trained local doctors and nurses. An inductively coupled plasma mass spectrometer was used to measure hair trace elements. All data in this study comes from China. Age, sex, body mass index, systolic blood pressure, diastolic blood pressure, smoking, drinking, hemoglobin, albumin, fasting blood pressure, zinc, chromium, copper, selenium, iron, manganese, strontium, lead, magnesium, potassium, and barium were simultaneously included in multivariate Logistic regression analysis. One adjusted model was done with all hair trace elements together. RESULTS Zinc and chromium levels were significantly lower in participants with ARCD than those without ARCD (P < 0.05 for all). Multivariate Logistic regression analysis indicated that zinc [odds ratio (OR): 0.988, 95%confidence interval (95%CI): 0.977-0.999] and chromium (OR: 0.051, 95%CI: 0.004-0.705) were associated with a reduced likelihood of ARCD (P < 0.05 for all). CONCLUSIONS Hair zinc and chromium levels were associated with a reduced likelihood of ARCD in centenarians and oldest-old adults. Further studies are necessary to verify if zinc and chromium supplementation has the potential to improve cognitive function and prevent ARCD development.
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Affiliation(s)
- L Feng
- Shihui Fu, Department of Cardiology, Hainan Hospital of Chinese People's Liberation Army General Hospital, Sanya, China. E-mail: ; Zhirui Li, Department of Orthopedics, Hainan Hospital of Chinese People's Liberation Army General Hospital, Sanya, China. E-mail: ; Mingxing Lei, Chinese People's Liberation Army Medical School, Beijing, China. E-mail: ; Yali Zhao, Central Laboratory, Hainan Hospital of Chinese People's Liberation Army General Hospital, Sanya, China. E-mail:
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Pascal L, Guerrero Urbano T, Petkar I, Reis Ferreira M, Kong A, Van Hemelrijck M, Lei M. Assessment of Optimal Time Points for Collection of Patient Reported Outcome Measures for Patients Undergoing Radical Radiotherapy for Head and Neck Cancer. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2022.07.1687] [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: 11/27/2022]
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Dunton J, Lord R, Lee K, Doughty C, Bogotto A, O'Neill N, Kong A, Reis Ferreira M, Guerrero Urbano T, Petkar I, Lei M. Adherence to Swallow Exercises during (Chemo)Radiotherapy for Head and Neck Cancer. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2022.07.1700] [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: 10/31/2022]
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Adjogatse D, Petkar I, Ferreira MR, Kong A, Lei M, Thomas C, Dudau C, Touska P, Barrington S, Urbano TG, Connor S. The Impact of Real-Time MRI Radiology-Based Peer Review on Head and Neck Radiotherapy Target Volume Delineation. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2022.07.1310] [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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Cotton A, Lavender V, Lei M. CN5 Barriers to digital health in patients with head and neck cancer. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.315] [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: 11/01/2022] Open
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Dean L, Oakley C, Guerrero Urbano T, Lei M. CN78 Initiating a personalised follow-up (PFU) programme for patients with head and neck cancer (HNC). Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.401] [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: 11/01/2022] Open
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Yu D, Chen W, Zhang J, Wei L, Qin J, Lei M, Tang H, Wang Y, Xue S, Dong J, Chen Y, Xie L, Di H. Effects of weight loss on bone turnover, inflammatory cytokines, and adipokines in Chinese overweight and obese adults. J Endocrinol Invest 2022; 45:1757-1767. [PMID: 35635643 PMCID: PMC9360139 DOI: 10.1007/s40618-022-01815-5] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 04/28/2022] [Indexed: 11/03/2022]
Abstract
PURPOSE Plenty of studies have examined the long term effect of weight loss on bone mineral density. This study aimed to explore the effects of 10% weight loss on early changes in bone metabolism as well as the possible influencing factors. METHODS Overweight and obese outpatients (BMI > 24.0 kg/m2) were recruited from the nutrition clinic and followed a calorie-restricted, high-protein, low-carbohydrate diet program. Dietary intake, body composition, serum procollagen type I N-propeptide (PINP), β-Crosslaps, PTH, 25(OH) VitD, a series of inflammatory cytokines and adipokines were measured for the participants before starting to lose weight and after 10% weight loss (NCT04207879). RESULTS A total of 75 participants were enrolled and 37 participants achieved a weight loss of at least 10%. It was found that PINP decreased (p = 0.000) and the β-Crosslaps increased (p = 0.035) in female participants. Decreases in PTH (p = 0.001), serum IL-2 (p = 0.013), leptin (p = 0.001) and increases in 25(OH) VitD (p = 0.001), serum ghrelin (p = 0.033) were found in 37 participants after 10% of their weight had been lost. Change in PINP was detected to be significantly associated with change in lean body mass (r = 0.418, p = 0.012) and change in serum ghrelin(r = - 0.374, p = 0.023). CONCLUSIONS Bone formation was suppressed and bone absorption was increased in female subjects after a 10% weight loss. Bone turnover was found to be associated with lean body mass and affected by the circulating ghrelin level.
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Affiliation(s)
- D Yu
- Department of Nutrition, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - W Chen
- Department of Orthopedic Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - J Zhang
- Clinical Biochemistry Lab, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - L Wei
- Department of Nuclear Medicine, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - J Qin
- The Biobank, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - M Lei
- Department of Nutrition, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - H Tang
- Department of Nutrition, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Y Wang
- Department of Nutrition, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - S Xue
- Department of Nutrition, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - J Dong
- Joint Department, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Y Chen
- The Graduate School, Hebei Medical University, Shijiazhuang, China
| | - L Xie
- School of Chemical Engineering, Shijiazhuang University, Shijiazhuang, China.
| | - H Di
- Department of Nutrition, The Third Hospital of Hebei Medical University, Shijiazhuang, China.
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André T, Lonardi S, Wong K, Lenz HJ, Gelsomino F, Aglietta M, Morse M, Van Cutsem E, McDermott R, Hill A, Sawyer M, Hendlisz A, Neyns B, Abdullaev S, Memaj A, Lei M, Dixon M, Kopetz S, Overman M. Nivolumab + low-dose ipilimumab in previously treated patients with microsatellite instability-high/mismatch repair-deficient metastatic colorectal cancer: 4-year follow-up from CheckMate 142. Ann Oncol 2022; 33:1052-1060. [DOI: 10.1016/j.annonc.2022.06.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 06/16/2022] [Accepted: 06/17/2022] [Indexed: 11/30/2022] Open
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André T, Van Cutsem E, Elez E, Bennouna J, de la Fouchardière C, Yoshino T, Jensen L, Mendez G, Li J, Goekkurt E, Abdullaev S, Chen T, Lei M, Lonardi S. P-12 A phase 3 study of nivolumab (NIVO), NIVO + ipilimumab (IPI), or chemotherapy for microsatellite instability-high (MSI-H)/mismatch repair-deficient (dMMR) metastatic colorectal cancer (mCRC): CheckMate 8HW. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.04.104] [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: 11/01/2022] Open
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Chau I, Ajani J, Doki Y, Xu J, Wyrwicz L, Motoyama S, Ogata T, Kawakami H, Hsu C, Adenis A, El Hajbi F, Di Bartolomeo M, Braghiroli M, Holtved E, Blum Murphy M, Abdullaev S, Soleymani S, Lei M, Kato K, Kitagawa Y. O-3 Nivolumab (NIVO) plus chemotherapy (chemo) or ipilimumab (IPI) vs chemo as first-line treatment for advanced esophageal squamous cell carcinoma (ESCC): Expanded efficacy and safety analyses from CheckMate 648. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.04.444] [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: 11/01/2022] Open
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Ma Z, Qi T, Lin L, Lei M. Inverse identification of geometric and acoustic parameters of inhomogeneous coatings through URCAS-based least-squares coupled cross-correlation algorithm. Ultrasonics 2022; 119:106626. [PMID: 34695748 DOI: 10.1016/j.ultras.2021.106626] [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: 04/14/2021] [Revised: 10/13/2021] [Accepted: 10/13/2021] [Indexed: 06/13/2023]
Abstract
Aiming to determine the geometric and acoustic parameters of inhomogeneous multi-layer coatings, an ultrasonic pressure reflection coefficient amplitude spectrum (URCAS) is derived using a material-oriented regularization scheme, when wave propagates perpendicularly to the coating surface. Based on the derived theoretical URCAS, a new objective function combining least-squares and cross-correlation algorithm is developed to simultaneously identify the thickness, sound velocity, density, attenuation coefficient amplitude, and attenuation coefficient power-law of the multi-layer coating. Genetic algorithm with the constraint of total multi-layer coating thickness being known is presented to optimize the nonlinear objective function for obtaining global optimal solution. Ultrasonic experiments were implemented on a dual-layer coating specimen with coating1/coating2/substrate structure using a flat immersion transducer with a central frequency of 15 MHz. The inversed thicknesses, sound velocities, and densities of the dual-layer coating were in good agreement with those measured through other methods, with less than 8.1% errors. The inversed attenuation coefficients of the coating 1 and coating 2 were α(f) = 1.02e-2 × f1.93 and α(f) = 4.62e-3 × f1.97, respectively. The upper bounds of the relative errors +r of inverted parameters were all less than 0.061. The proposed ultrasonic inversion method could be used to quantitatively characterize the surface integrity of inhomogeneous multi-layer coatings.
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Affiliation(s)
- Zhiyuan Ma
- NDT & E Laboratory, Dalian University of Technology, Dalian 116024, China
| | - Tianzhi Qi
- NDT & E Laboratory, Dalian University of Technology, Dalian 116024, China
| | - Li Lin
- NDT & E Laboratory, Dalian University of Technology, Dalian 116024, China.
| | - Mingkai Lei
- Surface Engineering Laboratory, School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China
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Moehler M, Ajani J, Kuzdzal J, Zander T, Van Cutsem E, Piessen G, Mendez G, Feliciano J, Motoyama S, Lièvre A, Uronis H, Elimova E, Grootscholten C, Geboes K, Zhang J, Soleymani S, Lei M, Kondo K, Cleary J, Kelly R. 1381P Adjuvant nivolumab in resected esophageal or gastroesophageal junction cancer (EC/GEJC) following neoadjuvant chemoradiotherapy (CRT): 14-month follow-up of CheckMate 577. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.1490] [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: 10/20/2022] Open
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Dolly S, Russell B, Moss C, Tsotra E, Gousis C, Roca J, Sita-Lumsden A, Khan M, Josephs D, Zaki K, Smith D, Michalarea V, Kristeleit R, Enting D, Flanders L, Lei M, Sawyer E, Spicer J, Ross P, Montes A, Van Hemelrijick M. 1608P The impact of COVID-19 on the delivery of systemic anti-cancer treatment at Guy’s Cancer Centre. Ann Oncol 2021. [PMCID: PMC8454366 DOI: 10.1016/j.annonc.2021.08.1601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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Janjigian Y, Ajani J, Moehler M, Garrido M, Gallardo C, Shen L, Yamaguchi K, Wyrwicz L, Skoczylas T, Bragagnoli A, Liu T, Tehfe M, Elimova E, Li M, Poulart V, Lei M, Kondo K, Shitara K. LBA7 Nivolumab (NIVO) plus chemotherapy (Chemo) or ipilimumab (IPI) vs chemo as first-line (1L) treatment for advanced gastric cancer/gastroesophageal junction cancer/esophageal adenocarcinoma (GC/GEJC/EAC): CheckMate 649 study. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.2131] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Forster M, Mendes R, Guerrero Urbano T, Evans M, Lei M, Spanswick V, Miles E, Simões R, Wheeler G, Forsyth S, White L. 866P ORCA-2: A phase I study of olaparib in addition to cisplatin-based concurrent chemoradiotherapy for patients with high risk locally advanced (LA) squamous cell carcinoma of the head and neck (HNSCC). Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.1276] [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: 11/26/2022] Open
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20
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Connor S, Sit C, Anjari M, Lei M, Guerrero-Urbano T, Szyszko T, Cook G, Bassett P, Goh V. The ability of post-chemoradiotherapy DWI ADC mean and 18F-FDG SUV max to predict treatment outcomes in head and neck cancer: impact of human papilloma virus oropharyngeal cancer status. J Cancer Res Clin Oncol 2021; 147:2323-2336. [PMID: 34159420 PMCID: PMC8236463 DOI: 10.1007/s00432-021-03662-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Accepted: 05/10/2021] [Indexed: 11/26/2022]
Abstract
OBJECTIVES To evaluate the ability of post-chemo-radiotherapy (CRT) diffusion-weighted-MRI apparent diffusion coefficient (ADCmean) and 18F-FDG PET maximum standardized uptake value (SUVmax) to predict disease-free survival (DFS) in head and neck squamous cell carcinoma (HNSCC), and to determine whether this ability is influenced by human papillomavirus oropharyngeal cancer (HPV-OPC) status. METHODS This prospective cohort observational study included 65 participants (53 male, mean ± SD age 59.9 ± 7.9 years, 46 HPV-OPC) with stage III or IV HNSCC. Primary tumour and nodal ADCmean (pre-treatment, 6- and 12-weeks post-CRT) and SUVmax (12-weeks post-CRT) were measured. Variables were compared with 2-year DFS (independent t-test/Mann-Whitney test) and overall DFS (Cox regression), before and after accounting for HPV-OPC status. Variables were also compared between HPV-OPC and other HNSCC subgroups after stratifying for DFS. RESULTS Absolute post-CRT ADCmean values predicted 2-year DFS and overall DFS for all participants (p = 0.03/0.03, 6-week node; p = 0.02/0.03 12-week primary tumour) but not in the HPV-OPC subgroup. In participants with DFS, percentage interval changes in primary tumour ADCmean at 6- and 12-weeks were higher in HPV-OPC than other HNSCC (p = 0.01, 6 weeks; p = 0.005, 12 weeks). The 12-week post-CRT SUVmax did not predict DFS. CONCLUSION Absolute post-CRT ADCmean values predicted DFS in HNSCC but not in the HPV-OPC subgroup. Amongst participants with DFS, post-CRT percentage interval changes in primary tumour ADCmean were significantly higher in HPV-OPC than in other HNSCC. Knowledge of HPV-OPC status is crucial to the clinical utilisation of post-CRT DWI-MRI for the prediction of outcomes.
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Affiliation(s)
- S Connor
- School of Biomedical Engineering and Imaging Sciences, St Thomas' Hospital, King's College, London, SE1 7EH, UK.
- Department of Neuroradiology, Ruskin Wing, Kings College Hospital, Denmark Hill, London, SE5 9RS, UK.
- Department of Radiology, Guy's Hospital, 2nd Floor, Tower Wing, Great Maze Pond, London, SE1 9RT, UK.
| | - C Sit
- Department of Radiology, Guy's Hospital, 2nd Floor, Tower Wing, Great Maze Pond, London, SE1 9RT, UK
| | - M Anjari
- Department of Radiology, Guy's Hospital, 2nd Floor, Tower Wing, Great Maze Pond, London, SE1 9RT, UK
| | - M Lei
- Department of Oncology, Guy's Hospital, 2nd Floor, Tower Wing, Great Maze Pond, London, SE1 9RT, UK
| | - T Guerrero-Urbano
- Department of Oncology, Guy's Hospital, 2nd Floor, Tower Wing, Great Maze Pond, London, SE1 9RT, UK
| | - T Szyszko
- King's College London & Guy's and St. Thomas' PET Centre, London, SE1 7EH, UK
| | - G Cook
- School of Biomedical Engineering and Imaging Sciences, St Thomas' Hospital, King's College, London, SE1 7EH, UK
- King's College London & Guy's and St. Thomas' PET Centre, London, SE1 7EH, UK
| | - P Bassett
- Department of Oncology, Guy's Hospital, 2nd Floor, Tower Wing, Great Maze Pond, London, SE1 9RT, UK
| | - V Goh
- School of Biomedical Engineering and Imaging Sciences, St Thomas' Hospital, King's College, London, SE1 7EH, UK
- Department of Radiology, Guy's Hospital, 2nd Floor, Tower Wing, Great Maze Pond, London, SE1 9RT, UK
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Pascal L, Van Hemelrijck M, Guerrero Urbano T, Lei M. PO-1003 Implementation of the routine collection of PROMs for patients with Head and Neck cancer. Radiother Oncol 2021. [DOI: 10.1016/s0167-8140(21)07454-5] [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: 10/20/2022]
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De Felice F, Humbert-Vidan L, Lei M, King A, Guerrero Urbano T. PO-0971 Locally advanced oropharyngeal cancer: a dynamic nomogram. Radiother Oncol 2021. [DOI: 10.1016/s0167-8140(21)07422-3] [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: 10/20/2022]
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23
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Humbert-Vidan L, Patel V, Begum R, McGovern M, Eaton D, Kong A, Petkar I, Reis Ferreira M, Lei M, King A, Guerrero Urbano T. PH-0387 Mandible osteoradionecrosis: a dosimetric study. Radiother Oncol 2021. [DOI: 10.1016/s0167-8140(21)07318-7] [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: 10/20/2022]
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Beck A, Due A, Birk C, Majgaard M, Lei M, Langsted S, Jensen T. An innovative rehabilitating meals-on-wheels service for frail old people - a controlled feasibility study. Clin Nutr ESPEN 2020. [DOI: 10.1016/j.clnesp.2020.09.526] [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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Michaelidou A, Adjogatse D, Suh Y, Pike L, Thomas C, Woodley O, Rackely T, Palaniappan N, Jayaprakasam V, Sanchez-Nieto B, Evans M, Barrington S, Lei M, Guerrero Urbano T. 18F-FDG-PET in guided dose-painting with intensity modulated radiotherapy in oropharyngeal tumours: A phase I study (FiGaRO). Radiother Oncol 2020; 155:261-268. [PMID: 33161013 DOI: 10.1016/j.radonc.2020.10.039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 10/25/2020] [Accepted: 10/28/2020] [Indexed: 12/25/2022]
Abstract
BACKGROUND AND PURPOSE The FiGaRO trial assessed the feasibility and safety of using an FDG-PET-based dose-painting technique to deliver a radiotherapy (RT) boostto the FDG-avid primary tumour in patients with locally advanced high and intermediate risk oropharyngeal cancer. MATERIALS AND METHOD Patients underwent a planning 18FDG-PET-CT scan, immobilised in the treatment position, after one cycle of induction chemotherapy. The volume of persistent FDG-avidity in the primary tumour was escalated to 71.5 Gy in30 fractions delivered using a simultaneous integrated boost Intensity Modulated RT (SIB-IMRT) technique. RT was delivered with concomitant Cisplatin following 2 cycles of induction chemotherapy. The primary outcome was the incidence of grade ≥ 3 late mucosal toxicity 12 months post-treatment, with an excess rate of >10% regarded as unacceptable. RESULTS Twenty-nine patients were included and twenty-four were treated between 2014 and 2018, in two UK centres. Median follow-up was 36 months (range 4-56 months). Pre-defined planning target volume objectives and organ at risk dose constraints were met in all cases. There were no incidents of acute grade 4 toxicity. There were 4 cases of grade ≥ 3 mucosal toxicity at 12 months post-treatment (19.1%). There were no cases of persistent mucosal ulceration at 12 months. Overall survival at 3-years was 87.5%, 92.9% for intermediate and 70.0% for high risk patients. CONCLUSION Late toxicity rates, although higher than anticipated, are comparable to contemporary published data for standard dose chemo-IMRT. Results suggest improved 3y survival rates for high risk patients. This approach merits further investigation. ClinicalTrials.gov Identifier: NCT02953197.
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Affiliation(s)
- A Michaelidou
- Department of Clinical Oncology, Guy's and St Thomas' NHS Foundation Trust, London, UK; King's College London and Guy's and St Thomas' PET Centre, School of Biomedical Engineering and Imaging Sciences, King's College London, King's Health Partners, London, UK; Kent Oncology Centre, Maidstone and Tunbridge Wells NHS Trust, Kent, UK
| | - D Adjogatse
- Department of Clinical Oncology, Guy's and St Thomas' NHS Foundation Trust, London, UK; King's College London and Guy's and St Thomas' PET Centre, School of Biomedical Engineering and Imaging Sciences, King's College London, King's Health Partners, London, UK
| | - Y Suh
- Department of Clinical Oncology, Guy's and St Thomas' NHS Foundation Trust, London, UK; King's College London and Guy's and St Thomas' PET Centre, School of Biomedical Engineering and Imaging Sciences, King's College London, King's Health Partners, London, UK; Department of Clinical Oncology, Royal Marsden NHS Foundation Trust, London, UK
| | - L Pike
- King's College London and Guy's and St Thomas' PET Centre, School of Biomedical Engineering and Imaging Sciences, King's College London, King's Health Partners, London, UK
| | - C Thomas
- Department of Medical Physics, Guy's and St Thomas' NHS Foundation Trust, London, UK; King's College London and Guy's and St Thomas' PET Centre, School of Biomedical Engineering and Imaging Sciences, King's College London, King's Health Partners, London, UK
| | - O Woodley
- Medical Physics Department, Velindre University NHS Trust, Cardiff, UK
| | - T Rackely
- Department of Oncology, Velindre University NHS Trust, Cardiff, UK
| | - N Palaniappan
- Department of Oncology, Velindre University NHS Trust, Cardiff, UK
| | - V Jayaprakasam
- Wales Research and Diagnostic PET Imaging Centre, Cardiff, UK
| | - B Sanchez-Nieto
- Institute of Physics, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - M Evans
- Department of Oncology, Velindre University NHS Trust, Cardiff, UK
| | - S Barrington
- King's College London and Guy's and St Thomas' PET Centre, School of Biomedical Engineering and Imaging Sciences, King's College London, King's Health Partners, London, UK
| | - M Lei
- Department of Clinical Oncology, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - T Guerrero Urbano
- Department of Clinical Oncology, Guy's and St Thomas' NHS Foundation Trust, London, UK.
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Sambasivan K, Michaelidou A, Ross G, Oakley R, Lyons A, Cascarini L, Fry A, Jeannon J, Ferreira MR, Lei M, Urbano TG. PO-0800: Outcomes of patients with locally advanced oral cavity SCC treated radically at Guys' Cancer Centre. Radiother Oncol 2020. [DOI: 10.1016/s0167-8140(21)00817-3] [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: 11/27/2022]
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Dong K, Xu G, Lei M, Zhao S, Yao M. 995P CTNNB1 mutations in Chinese HCC patients and immune microenvironment related analysis. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.1111] [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: 11/16/2022] Open
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Moehler M, Shitara K, Garrido M, Salman P, Shen L, Wyrwicz L, Yamaguchi K, Skoczylas T, Campos Bragagnoli A, Liu T, Schenker M, Yanez P, Tehfe M, Poulart V, Cullen D, Lei M, Kondo K, Li M, Ajani J, Janjigian Y. LBA6_PR Nivolumab (nivo) plus chemotherapy (chemo) versus chemo as first-line (1L) treatment for advanced gastric cancer/gastroesophageal junction cancer (GC/GEJC)/esophageal adenocarcinoma (EAC): First results of the CheckMate 649 study. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.2296] [Citation(s) in RCA: 137] [Impact Index Per Article: 34.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
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Kelly R, Ajani J, Kuzdzal J, Zander T, Van Cutsem E, Piessen G, Mendez G, Feliciano J, Motoyama S, Lièvre A, Uronis H, Elimova E, Grootscholten C, Geboes K, Zhang J, Zhu L, Lei M, Kondo K, Cleary J, Moehler M. LBA9_PR Adjuvant nivolumab in resected esophageal or gastroesophageal junction cancer (EC/GEJC) following neoadjuvant chemoradiation therapy (CRT): First results of the CheckMate 577 study. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.2299] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
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He S, Wen Q, O’Shea C, Mu-u-min R, Tan X, Ou X, Camelliti P, Pavlovic P, Lei M. A new method of transverse cardiac slicing and optical mapping of murine heart. J Mol Cell Cardiol 2020. [DOI: 10.1016/j.yjmcc.2019.11.022] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Potts KA, Stieglitz JT, Lei M, Van Deventer JA. Reporter system architecture affects measurements of noncanonical amino acid incorporation efficiency and fidelity. Mol Syst Des Eng 2020; 5:573-588. [PMID: 33791108 PMCID: PMC8009230 DOI: 10.1039/c9me00107g] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The ability to genetically encode noncanonical amino acids (ncAAs) within proteins supports a growing number of applications ranging from fundamental biological studies to enhancing the properties of biological therapeutics. Currently, our quantitative understanding of ncAA incorporation systems is confounded by the diverse set of characterization and analysis approaches used to quantify ncAA incorporation events. While several effective reporter systems support such measurements, it is not clear how quantitative results from different reporters relate to one another, or which details influence measurements most strongly. Here, we evaluate the quantitative performance of single-fluorescent protein reporters, dual-fluorescent protein reporters, and cell surface-displayed protein reporters of ncAA insertion in response to the TAG (amber) codon in yeast. While different reporters support varying levels of apparent readthrough efficiencies, flow cytometry-based evaluations with dual reporters yielded measurements exhibiting consistent quantitative trends and precision across all evaluated conditions. Further investigations of dual-fluorescent protein reporter architecture revealed that quantitative outputs are influenced by stop codon location and N- and C-terminal fluorescent protein identity. Both dual-fluorescent protein reporters and a "drop-in" version of yeast display support quantification of ncAA incorporation in several single-gene knockout strains, revealing strains that enhance ncAA incorporation efficiency without compromising fidelity. Our studies reveal critical details regarding reporter system performance in yeast and how to effectively deploy such reporters. These findings have substantial implications for how to engineer ncAA incorporation systems-and protein translation apparatuses-to better accommodate alternative genetic codes for expanding the chemical diversity of biosynthesized proteins.
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Affiliation(s)
- K A Potts
- Chemical and Biological Engineering Department, Tufts University, Medford, Massachusetts 02155, United States
| | - J T Stieglitz
- Chemical and Biological Engineering Department, Tufts University, Medford, Massachusetts 02155, United States
| | - M Lei
- Chemical and Biological Engineering Department, Tufts University, Medford, Massachusetts 02155, United States
| | - J A Van Deventer
- Chemical and Biological Engineering Department, Tufts University, Medford, Massachusetts 02155, United States
- Biomedical Engineering Department, Tufts University, Medford, Massachusetts 02155, United States
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Reed N, Glen H, Gerrard G, Good J, Lei M, Lyon AR, Strachan M, Wadsley J, Newbold K. Expert Consensus on the Management of Adverse Events During Treatment with Lenvatinib for Thyroid Cancer. Clin Oncol (R Coll Radiol) 2019; 32:e145-e153. [PMID: 31843241 DOI: 10.1016/j.clon.2019.11.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [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: 07/09/2018] [Revised: 11/04/2019] [Accepted: 11/07/2019] [Indexed: 12/23/2022]
Abstract
AIMS Lenvatinib is an oral multi-kinase inhibitor approved for the treatment of adults with progressive, locally advanced or metastatic, differentiated thyroid carcinoma refractory to radioactive iodine. MATERIALS AND METHODS A literature review was undertaken to inform the development of consensus-based guidance for the routine management of adverse events associated with lenvatinib. PubMed was searched on 24 October 2017; the search terms were 'lenvatinib' and 'thyroid cancer'. RESULTS Hypertension, diarrhoea, weight loss, skin toxicities and cardiovascular adverse events were considered. For grade 1/2 diarrhoea, initial treatment should be loperamide with a 1-week treatment interruption if diarrhoea persists and dose reduction if diarrhoea recurs on reinitiation of lenvatinib. Blood pressure should be monitored daily in patients with pre-existing hypertension, otherwise from 1 week after the initiation of lenvatinib and weekly for the first 2 months. For patients with systolic blood pressure ≥135 mmHg to <160 mmHg or diastolic blood pressure ≥85 mmHg to <100 mmHg, lenvatinib should be continued but antihypertensive therapy initiated/intensified. For patients who remain hypertensive, a treatment break can be considered with lenvatinib reinitiated at a reduced dose once the patient's blood pressure has stabilised for at least 48 h. Weight loss of 10% of baseline body weight or the onset of anorexia should be managed with a 1-week treatment break; patients should maintain a healthy, active lifestyle. For patients with grade 2 proteinuria, lenvatinib may be continued, but an angiotensin II receptor blocker or angiotensin converting enzyme inhibitor should be commenced. For grade >3 proteinuria, lenvatinib should be interrupted until proteinuria returns to 1+. For chronic proteinuria, lenvatinib should be stopped. Skin toxicities should be managed with moisturisers or emollients and soap substitutes. CONCLUSIONS Prophylaxis, regular monitoring and symptomatic management with appropriate short treatment breaks and, for persistent adverse events, dose reductions, are recommended to enable patients to remain on the optimal dose regimen.
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Affiliation(s)
- N Reed
- Beatson West of Scotland Cancer Centre, Glasgow, UK.
| | - H Glen
- Beatson West of Scotland Cancer Centre, Glasgow, UK
| | | | - J Good
- QE Hospital, Birmingham, UK
| | - M Lei
- Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - A R Lyon
- Royal Brompton & Harefield NHS Foundation Trust and Imperial College London, London, UK
| | | | | | - K Newbold
- Royal Marsden NHS Foundation Trust, London, UK
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Zheng W, Liu C, Lei M, Han Y, Zhou X, Li C, Sun S, Ma X. Evaluation of common variants in the CNR2 gene and its interaction with abdominal obesity for osteoporosis susceptibility in Chinese post-menopausal females. Bone Joint Res 2019; 8:544-549. [PMID: 31832174 PMCID: PMC6888734 DOI: 10.1302/2046-3758.811.bjr-2018-0284.r1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Objectives The objective of this study was to investigate the association of four single-nucleotide polymorphisms (SNPs) of the cannabinoid receptor 2 (CNR2) gene, gene-obesity interaction, and haplotype combination with osteoporosis (OP) susceptibility. Methods Chinese patients with OP were recruited between March 2011 and December 2015 from our hospital. In this study, a total of 1267 post-menopausal female patients (631 OP patients and 636 control patients) were selected. The mean age of all subjects was 69.2 years (sd 15.8). A generalized multifactor dimensionality reduction (GMDR) model and logistic regression model were used to examine the interaction between SNP and obesity on OP. For OP patient-control haplotype analyses, the SHEsis online haplotype analysis software (http://analysis.bio-x.cn/) was employed. Results The logistic regression model revealed that the C allele of rs2501431 and the G allele of rs3003336 were associated with increased OP risk, compared with those with wild genotype. However, no significant correlations were found when analyzing the association of rs4237 and rs2229579 with OP risk. The GMDR analysis suggested that the interaction model composed of two factors, rs3003336 and abdominal obesity (AO), was the best model with statistical significance (p-value from sign test (Psign) = 0.012), indicating a potential gene-environment interaction between rs3003336 and AO. Overall, the two-locus models had a cross-validation consistency of 10/10 and had a testing accuracy of 0.641. Abdominally obese subjects with the AG or GG genotype have the highest OP risk, compared with subjects with the AA genotype and normal waist circumference (WC) (odds ratio (OR) 2.23, 95% confidence interval (CI) 1.54 to 3.51). Haplotype analysis also indicated that the haplotype containing the rs3003336-G and rs2501431-C alleles was associated with a statistically increased OP risk. Conclusion Our results suggested that the C allele of rs2501431 and the G allele of rs3003336 of the CNR2 gene, interaction between rs3003336 and AO, and the haplotype containing the rs3003336-G and rs2501431-C alleles were all associated with increased OP risk. Cite this article: Bone Joint Res 2019;8:544–549.
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Affiliation(s)
- W Zheng
- Department of Orthopaedics, Affiliated Hospital of Hebei University, Baoding, China
| | - C Liu
- Department of Pharmacology, Department of Medicine, Hebei University, Baoding, China
| | - M Lei
- Department of Orthopaedics, Affiliated Hospital of Hebei University, Baoding, China
| | - Y Han
- Department of Orthopaedics, Affiliated Hospital of Hebei University, Baoding, China
| | - X Zhou
- Department of Orthopaedics, Affiliated Hospital of Hebei University, Baoding, China
| | - C Li
- Department of Orthopaedics, Affiliated Hospital of Hebei University, Baoding, China
| | - S Sun
- Department of Orthopaedics, Affiliated Hospital of Hebei University, Baoding, China
| | - X Ma
- Department of Orthopaedics, Affiliated Hospital of Hebei University, Baoding, China
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He S, Wen Q, O’Shea C, Mu-u-min R, Kou K, Grassam-Rowe A, Liu Y, Fan Z, Tan X, Ou X, Camelliti P, Pavlovic D, Lei M. A Protocol for Transverse Cardiac Slicing and Optical Mapping in Murine Heart. Front Physiol 2019; 10:755. [PMID: 31293436 PMCID: PMC6603341 DOI: 10.3389/fphys.2019.00755] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [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: 12/08/2018] [Accepted: 05/31/2019] [Indexed: 01/27/2023] Open
Abstract
Thin living tissue slices have recently emerged as a new tissue model for cardiac electrophysiological research. Slices can be produced from human cardiac tissue, in addition to small and large mammalian hearts, representing a powerful in vitro model system for preclinical and translational heart research. In the present protocol, we describe a detailed mouse heart transverse slicing and optical imaging methodology. The use of this technology for high-throughput optical imaging allows study of electrophysiology of murine hearts in an organotypic pseudo two-dimensional model. The slices are cut at right angles to the long axis of the heart, permitting robust interrogation of transmembrane potential (Vm) and calcium transients (CaT) throughout the entire heart with exceptional regional precision. This approach enables the use of a series of slices prepared from the ventricles to measure Vm and CaT with high temporal and spatial resolution, allowing (i) comparison of successive slices which form a stack representing the original geometry of the heart; (ii) profiling of transmural and regional gradients in Vm and CaT in the ventricle; (iii) characterization of transmural and regional profiles of action potential and CaT alternans under stress (e.g., high frequency pacing or β-adrenergic stimulation) or pathological conditions (e.g., hypertrophy). Thus, the protocol described here provides a powerful platform for innovative research on electrical and calcium handling heterogeneity within the heart. It can be also combined with optogenetic technology to carry out optical stimulation; aiding studies of cellular Vm and CaT in a cell type specific manner.
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Affiliation(s)
- S. He
- Key Laboratory of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological Key Laboratory of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, China
| | - Q. Wen
- Institute of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - C. O’Shea
- Institute of Cardiovascular Sciences, University of Birmingham, Birmingham, United Kingdom
| | - R. Mu-u-min
- Department of Pharmacology, University of Oxford, Oxford, United Kingdom
| | - K. Kou
- Key Laboratory of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological Key Laboratory of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, China
| | - A. Grassam-Rowe
- Department of Pharmacology, University of Oxford, Oxford, United Kingdom
| | - Y. Liu
- Department of Cardiovascular Medicine, Southwest Medical University, Luzhou, China
| | - Z. Fan
- Department of Cardiovascular Medicine, Southwest Medical University, Luzhou, China
| | - X. Tan
- Key Laboratory of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological Key Laboratory of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, China
| | - X. Ou
- Key Laboratory of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological Key Laboratory of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, China
| | - P. Camelliti
- School of Biosciences and Medicine, University of Surrey, Guildford, United Kingdom
| | - D. Pavlovic
- Institute of Cardiovascular Sciences, University of Birmingham, Birmingham, United Kingdom
| | - M. Lei
- Key Laboratory of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological Key Laboratory of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, China
- Department of Pharmacology, University of Oxford, Oxford, United Kingdom
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Liu WJ, Liu ML, Lin S, Liu JC, Lei M, Wu H, Dai CQ, Wei ZY. Synthesis of high quality silver nanowires and their applications in ultrafast photonics. Opt Express 2019; 27:16440-16448. [PMID: 31252869 DOI: 10.1364/oe.27.016440] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Accepted: 05/16/2019] [Indexed: 06/09/2023]
Abstract
Silver nanowires are widely used in catalysts, surface enhanced Raman scattering, microelectronic equipment, thin film solar cells, microelectrodes and biosensors for their excellent conductivity, heat transfer, low surface resistance, high transparency and good biocompatibility. However, the optical nonlinearity of silver nanowires has not been further explored yet. In this paper, three silver nanowire samples with different concentrations are produced via a typical hydrothermal method. Their applications to fiber lasers are implemented to prove the optical nonlinearity of silver nanowires for the first time. Based on three kinds of silver nanowires, the mode-locked operation of fiber lasers is successfully realized. Moreover, the fiber laser based on the silver nanowire with a concentration of 2 mg/L demonstrates the shortest pulse duration of 149.3 fs. The experiment not only proves the optical nonlinearity of silver nanowires, but also has some enlightenment on the selection of the optimum concentration of silver nanowires in the consideration of ultrashort pulse output.
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Liu WJ, Liu ML, Liu B, Quhe RG, Lei M, Fang SB, Teng H, Wei ZY. Nonlinear optical properties of MoS 2-WS 2 heterostructure in fiber lasers. Opt Express 2019; 27:6689-6699. [PMID: 30876248 DOI: 10.1364/oe.27.006689] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
As a saturable absorption material, the heterostructure with the van der Waals structure has been paid much attention in material science. In general, the heterogeneous combination is able to neutralize, or even exceed, the individual material's advantages in some aspects. In this paper, which describes the magnetron sputtering deposition method, the tapered fiber is coated by the MoS2-WS2 heterostructure, and the MoS2-WS2 heterostructure saturable absorber (SA) is fabricated. The modulation depth of the prepared MoS2-WS2 heterostructure SA is measured to be 19.12%. Besides, the theoretical calculations for the band gap and carrier mobility of the MoS2-WS2 heterostructure are provided. By employing the prepared SA, a stable and passively erbium-doped fiber laser is implemented. The generated pulse duration of 154 fs is certified to be the shortest among all fiber lasers based on transition mental dichalcogenides. Results in this paper provide the new direction for the fabrication of ultrafast photon modulation devices.
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Pencharz D, Dunn J, Connor S, Siddiqui A, Sriskandan N, Thavaraj S, Jeannon JP, Oakley R, Lei M, Guerrero-Urbano T, Cook GJ, Szyszko TA. Palatine tonsil SUVmax on FDG PET-CT as a discriminator between benign and malignant tonsils in patients with and without head and neck squamous cell carcinoma of unknown primary. Clin Radiol 2019; 74:165.e17-165.e23. [PMID: 30454841 DOI: 10.1016/j.crad.2018.10.007] [Citation(s) in RCA: 13] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Accepted: 10/16/2018] [Indexed: 11/22/2022]
Abstract
AIM To analyse the maximum standardised uptake value (SUVmax) ratio between tonsils in patients with and without tonsillar carcinoma to determine useful diagnostic thresholds. MATERIALS AND METHODS Positron-emission tomography (PET)/computed tomography (CT) examinations of patients with suspected head and neck squamous cell carcinoma (SCC) and controls from April 2013 to September 2016 were reviewed retrospectively. Tonsillar SUVmax ratios (ipsilateral/contralateral for malignant tonsils, maximum/minimum for patients without [controls]) were calculated and used to construct a receiver operating characteristic (ROC) curve. RESULTS Twenty-five patients had tonsillar carcinoma (mean SUVmax ratio of 2, range 0.89-5.4) and 86 patients acted as controls (mean SUVmax ratio of 1.1, range 1-1.5). Using the ROC, the most accurate SUVmax ratio for identifying malignancy was >1.2 (77% sensitivity, 86% specificity). A potentially more clinically useful SUVmax ratio is ≥1.6 with 62% sensitivity and 100% specificity. CONCLUSION An SUVmax ratio between tonsils of ≥1.6 is highly suspicious for SCC and could be used to direct site of biopsy. Some malignant tonsils had normal FDG uptake; therefore, PET/CT should not be used to exclude tonsillar cancer. Minor asymmetrical uptake is frequently seen in non-malignant tonsils and does not necessarily require further investigation. Due to the single centre nature of this study and the recognised variation in SUV measurements between PET scans, other centres may need to develop their own cut-offs.
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Affiliation(s)
- D Pencharz
- Department of Nuclear Medicine, Brighton and Sussex University Hospitals NHS Trust, Brighton, UK.
| | - J Dunn
- King's College London and St Guy's and St Thomas' PET Centre, London, UK
| | - S Connor
- Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - A Siddiqui
- Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - N Sriskandan
- Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - S Thavaraj
- Head and Neck Pathology, King's College, London, UK
| | - J-P Jeannon
- Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - R Oakley
- Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - M Lei
- Guy's and St Thomas' NHS Foundation Trust, London, UK
| | | | - G J Cook
- King's College London and St Guy's and St Thomas' PET Centre, London, UK
| | - T A Szyszko
- King's College London and St Guy's and St Thomas' PET Centre, London, UK
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Huang HT, Lu YL, Wang CF, Lei M, Wang R, Wei YS. [Research progress on the association between microRNA-17-92 cluster and cardiovascular and cerebrovascular diseases]. Zhonghua Xin Xue Guan Bing Za Zhi 2019; 47:73-77. [PMID: 30669817 DOI: 10.3760/cma.j.issn.0253-3758.2019.01.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- H T Huang
- Department of Clinical Laboratory, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise 533000, China
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Guo M, Wu T, Bai H, Xi R, Wang CB, Pan YZ, Cai YG, Feng QS, Lei M. [Clinical features and prognosis of infection related to allogeneic hematopoietic stem cell transplantation in patients with blood diseases]. Zhonghua Xue Ye Xue Za Zhi 2019; 40:69-72. [PMID: 30704232 PMCID: PMC7351692 DOI: 10.3760/cma.j.issn.0253-2727.2019.01.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Download PDF] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Indexed: 11/20/2022]
Affiliation(s)
- M Guo
- Department of Hematology, Lanzhou General Hospital, Lanzhou Command, Lanzhou 730050, China
| | - T Wu
- Department of Hematology, Lanzhou General Hospital, Lanzhou Command, Lanzhou 730050, China
| | - H Bai
- Department of Hematology, Lanzhou General Hospital, Lanzhou Command, Lanzhou 730050, China
| | - R Xi
- Department of Hematology, Lanzhou General Hospital, Lanzhou Command, Lanzhou 730050, China
| | - C B Wang
- Department of Hematology, Lanzhou General Hospital, Lanzhou Command, Lanzhou 730050, China
| | - Y Z Pan
- Department of Hematology, Lanzhou General Hospital, Lanzhou Command, Lanzhou 730050, China
| | - Y G Cai
- Department of Hematology, Lanzhou General Hospital, Lanzhou Command, Lanzhou 730050, China
| | - Q S Feng
- Department of Microbiology Laboratory, Lanzhou General Hospital, Lanzhou Command, Lanzhou 730050, China
| | - M Lei
- Institute of Epidemiology and Health Statistics, School of Public Health, Lanzhou University, Lanzhou 730000, China
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Jin X, Huang H, Wu A, Gao S, Lei M, Zhao J, Gao X, Cao G. Inverse Capacity Growth and Pocket Effect in SnS 2 Semifilled Carbon Nanotube Anode. ACS Nano 2018; 12:8037-8047. [PMID: 30059618 DOI: 10.1021/acsnano.8b02861] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
SnS2 with high theoretical capacity has been impeded from practical applications as the anode of lithium-ion (Li-ion) batteries due to its large volume expansion and fast capacity decay. A nanostructure of the SnS2 semifilled carbon nanotube (SnS2@CNT) has been realized by plasma-assisted fabrication of Sn semifilled CNT (Sn@CNT) followed by post-sulfurization. When serving as the anode of a Li-ion battery, SnS2@CNT delivers an initial discharge capacity of 1258 mAh g-1 at 0.3 A g-1. Instead of capacity fading, SnS2@CNT shows inverse capacity growth to 2733 mAh g-1 after 470 cycles. The high-resolution transmission electron microscopy images show that the void in CNTs, after cycling, is fully filled with pulverized SnS2 grains which have a shortened Li-ion diffusion path and enhanced surface area for interfacial redox reactions. In addition, the CNTs, like a pocket, confine the pulverized SnS2, maintain the electric contact and structural integrity, and thus allow the electrodes to work safely under long cyclic loadings and extreme temperature conditions.
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Affiliation(s)
- Xiaozhe Jin
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Materials Science and Engineering , Dalian University of Technology , Dalian 116024 , China
| | - Hao Huang
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Materials Science and Engineering , Dalian University of Technology , Dalian 116024 , China
| | - Aimin Wu
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Materials Science and Engineering , Dalian University of Technology , Dalian 116024 , China
| | - Song Gao
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Materials Science and Engineering , Dalian University of Technology , Dalian 116024 , China
| | - Mingkai Lei
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Materials Science and Engineering , Dalian University of Technology , Dalian 116024 , China
| | - Jijun Zhao
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education) , Dalian University of Technology , Dalian 116024 , China
| | - Xiaoxia Gao
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Materials Science and Engineering , Dalian University of Technology , Dalian 116024 , China
| | - Guozhong Cao
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Materials Science and Engineering , Dalian University of Technology , Dalian 116024 , China
- Department of Materials Science and Engineering , University of Washington , Seattle , Washington 98195 , United States
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Wang R, Zeng Y, Qin H, Lu Y, Huang H, Lei M, Tan T, Huang Y, Luo H, Lan Y, Wei Y. Association of interleukin 22 gene polymorphisms and serum IL-22 level with risk of systemic lupus erythematosus in a Chinese population. Clin Exp Immunol 2018; 193:143-151. [PMID: 29603203 PMCID: PMC6046499 DOI: 10.1111/cei.13133] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [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] [Accepted: 03/21/2018] [Indexed: 01/12/2023] Open
Abstract
The aim of this study was to investigate the association between the single-nucleotide polymorphisms (SNPs) of the interleukin 22 (IL-22) gene and systemic lupus erythematosus (SLE) in a Chinese population. Three IL-22 SNPs (rs2227485, rs2227513 and rs2227491) were genotyped using SNaPshot SNP genotyping assays and identified by sequencing in 314 SLE patients and 411 healthy controls. The IL-22 level of serum was assessed by enzyme-linked immunosorbent assay (ELISA) kits. Data were analysed by spss version 17.0 software. We found that rs2227513 was associated with an increased risk of SLE [AG versus AA: adjusted odds ratio (aOR) = 2·24, 95% confidence interval (CI) = 1·22-4·12, P = 0·010; G versus· A: adjusted OR = 2·18, 95% CI = 1·20-3·97, P = 0·011]. Further analysis in patients with SLE showed that the AG genotype and G allele were associated with an increased risk of renal disorder in SLE (G versus A: aOR = 3·09, 95% CI = 1·30-7·33, P = 0·011; AG versus· AA: aOR = 3·25, 95% CI = 1·35-7·85, P = 0·009). In addition, the concentration of IL-22 was significantly lower in the rs2227513 AG genotype compared with AA genotype (P = 0·028). These results suggest that rs2227513 polymorphism might contribute to SLE susceptibility, probably by decreasing the expression of IL-22.
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Affiliation(s)
- R. Wang
- Clinical Medical School, Youjiang Medical University for NationalitiesBaiseGuangxiChina
- Department of Laboratory Medicinethe Affiliated Hospital of Youjiang Medical University for NationalitiesBaiseGuangxiChina
| | - Y.‐L. Zeng
- Department of Laboratory Medicinethe Affiliated Hospital of Youjiang Medical University for NationalitiesBaiseGuangxiChina
| | - H.‐M. Qin
- Clinical Medical School, Youjiang Medical University for NationalitiesBaiseGuangxiChina
- Department of Laboratory Medicinethe Affiliated Hospital of Youjiang Medical University for NationalitiesBaiseGuangxiChina
| | - Y.‐L. Lu
- Clinical Medical School, Youjiang Medical University for NationalitiesBaiseGuangxiChina
- Department of Laboratory Medicinethe Affiliated Hospital of Youjiang Medical University for NationalitiesBaiseGuangxiChina
| | - H.‐T. Huang
- Clinical Medical School, Youjiang Medical University for NationalitiesBaiseGuangxiChina
- Department of Laboratory Medicinethe Affiliated Hospital of Youjiang Medical University for NationalitiesBaiseGuangxiChina
| | - M. Lei
- Clinical Medical School, Youjiang Medical University for NationalitiesBaiseGuangxiChina
- Department of Laboratory Medicinethe Affiliated Hospital of Youjiang Medical University for NationalitiesBaiseGuangxiChina
| | - T. Tan
- Clinical Medical School, Youjiang Medical University for NationalitiesBaiseGuangxiChina
- Department of Laboratory Medicinethe Affiliated Hospital of Youjiang Medical University for NationalitiesBaiseGuangxiChina
| | - Y.‐Y. Huang
- Clinical Medical School, Youjiang Medical University for NationalitiesBaiseGuangxiChina
- Department of Laboratory Medicinethe Affiliated Hospital of Youjiang Medical University for NationalitiesBaiseGuangxiChina
| | - H.‐C. Luo
- Department of Laboratory Medicinethe Affiliated Hospital of Youjiang Medical University for NationalitiesBaiseGuangxiChina
| | - Y. Lan
- Department of Dermatologythe Affiliated Hospital of Youjiang Medical University for NationalitiesBaiseGuangxiChina
| | - Y.‐S. Wei
- Department of Laboratory Medicinethe Affiliated Hospital of Youjiang Medical University for NationalitiesBaiseGuangxiChina
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Wen Q, Gandhi K, Capel RA, Hao G, O'Shea C, Neagu G, Pearcey S, Pavlovic D, Terrar DA, Wu J, Faggian G, Camelliti P, Lei M. Transverse cardiac slicing and optical imaging for analysis of transmural gradients in membrane potential and Ca 2+ transients in murine heart. J Physiol 2018; 596:3951-3965. [PMID: 29928770 PMCID: PMC6117587 DOI: 10.1113/jp276239] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [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: 04/11/2018] [Accepted: 06/12/2018] [Indexed: 11/18/2022] Open
Abstract
Key points A robust cardiac slicing approach was developed for optical mapping of transmural gradients in transmembrane potential (Vm) and intracellular Ca2+ transient (CaT) of murine heart. Significant transmural gradients in Vm and CaT were observed in the left ventricle. Frequency‐dependent action potentials and CaT alternans were observed in all ventricular regions with rapid pacing, with significantly greater incidence in the endocardium than epicardium. The observations demonstrate the feasibility of our new approach to cardiac slicing for systematic analysis of intrinsic transmural and regional gradients in Vm and CaT.
Abstract Transmural and regional gradients in membrane potential and Ca2+ transient in the murine heart are largely unexplored. Here, we developed and validated a robust approach which combines transverse ultra‐thin cardiac slices and high resolution optical mapping to enable systematic analysis of transmural and regional gradients in transmembrane potential (Vm) and intracellular Ca2+ transient (CaT) across the entire murine ventricles. The voltage dye RH237 or Ca2+ dye Rhod‐2 AM were loaded through the coronary circulation using a Langendorff perfusion system. Short‐axis slices (300 μm thick) were prepared from the entire ventricles (from the apex to the base) by using a high‐precision vibratome. Action potentials (APs) and CaTs were recorded with optical mapping during steady‐state baseline and rapid pacing. Significant transmural gradients in Vm and CaT were observed in the left ventricle, with longer AP duration (APD50 and APD75) and CaT duration (CaTD50 and CaTD75) in the endocardium compared with that in the epicardium. No significant regional gradients were observed along the apico‐basal axis of the left ventricle. Interventricular gradients were detected with significantly shorter APD50, APD75 and CaTD50 in the right ventricle compared with left ventricle and ventricular septum. During rapid pacing, AP and CaT alternans were observed in most ventricular regions, with significantly greater incidence in the endocardium in comparison with epicardium. In conclusion, these observations demonstrate the feasibility of our new approach to cardiac slicing for systematic analysis of intrinsic transmural and regional gradients in Vm and CaT in murine ventricular tissue. A robust cardiac slicing approach was developed for optical mapping of transmural gradients in transmembrane potential (Vm) and intracellular Ca2+ transient (CaT) of murine heart. Significant transmural gradients in Vm and CaT were observed in the left ventricle. Frequency‐dependent action potentials and CaT alternans were observed in all ventricular regions with rapid pacing, with significantly greater incidence in the endocardium than epicardium. The observations demonstrate the feasibility of our new approach to cardiac slicing for systematic analysis of intrinsic transmural and regional gradients in Vm and CaT.
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Affiliation(s)
- Q Wen
- Institution of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - K Gandhi
- Medical School, University of Verona, Verona, Italy
| | - Rebecca A Capel
- Department of Pharmacology, University of Oxford, Oxford, UK
| | - G Hao
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease/Institute of Cardiovascular Research, Southwest Medical University, Luzhou, 6400, China
| | - C O'Shea
- Institute of Cardiovascular Sciences, University of Birmingham, Birmingham, UK
| | - G Neagu
- Department of Pharmacology, University of Oxford, Oxford, UK
| | - S Pearcey
- Department of Pharmacology, University of Oxford, Oxford, UK
| | - D Pavlovic
- Institute of Cardiovascular Sciences, University of Birmingham, Birmingham, UK
| | - Derek A Terrar
- Department of Pharmacology, University of Oxford, Oxford, UK
| | - J Wu
- Institution of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - G Faggian
- Medical School, University of Verona, Verona, Italy
| | | | - M Lei
- Department of Pharmacology, University of Oxford, Oxford, UK.,Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease/Institute of Cardiovascular Research, Southwest Medical University, Luzhou, 6400, China
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Zhu JH, Lei M, Chen EG, Qiao Q, Zhong TD. Ventilation strategy and anesthesia management in patients with severe tracheal stenosis undergoing urgent tracheal stenting. Acta Anaesthesiol Scand 2018; 62:600-607. [PMID: 29315465 DOI: 10.1111/aas.13062] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 11/23/2017] [Accepted: 11/30/2017] [Indexed: 12/14/2022]
Abstract
BACKGROUND Stenting of airway stenosis is a common procedure in specialized centers. The aim of this study was to summarize our clinical experience in ventilation strategy and anesthesia management of patients undergoing urgent tracheal stenting. METHODS Clinical data of 22 patients with severe tracheal stenosis who underwent urgent endoscopic placement of a tracheal stent during a 2-year period were retrospectively reviewed. The efficacy and safety of different ventilation strategies and veno-arterial extracorporeal membrane oxygenation (ECMO), individualized based on the cause and location of tracheal narrowing, were evaluated. RESULTS Sufficient ventilation was successfully established in all patients; ECMO was used in five patients with stenosis in the mid-trachea who were unable to tolerate conventional intubation; a laryngeal mask airway (LMA) was used in five patients with post-intubation tracheal stenosis; a cuffed tracheal tube was used in eight patients with lower tracheal stenosis; and low-frequency jet ventilation in rigid bronchoscopy was used in four patients with mid- or lower tracheal stenosis. Tracheal stents were successfully placed and there were significant improvements in dyspnea. There were significant increases in the partial pressure of carbon dioxide in patients ventilated with the LMA and cuffed tracheal tube. There was no hypoxia during the operative period. CONCLUSION Establishment of effective airway ventilation in patients with severe tracheal stenosis should be based on the cause, location, and severity of tracheal narrowing. Veno- arterial ECMO may be considered in patients with severe stenosis, if they are judged unable to tolerate conventional ventilation or jet ventilation.
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Affiliation(s)
- J.-H. Zhu
- Department of Anesthesia; Sir Run Run Shaw Hospital of Zhejiang University; Hangzhou China
| | - M. Lei
- Department of Anesthesia; Sir Run Run Shaw Hospital of Zhejiang University; Hangzhou China
| | - E.-G. Chen
- Department of Respiratory; Sir Run Run Shaw Hospital of Zhejiang University; Hangzhou China
| | - Q. Qiao
- Department of Anesthesia; Sir Run Run Shaw Hospital of Zhejiang University; Hangzhou China
| | - T.-D. Zhong
- Department of Anesthesia; Sir Run Run Shaw Hospital of Zhejiang University; Hangzhou China
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Michaelidou A, Pike L, Lei M, Thomas C, Guerrero Urbano T, Barrington S. EP-1149: Clinical Evaluation of attenuation correction in FDG-PET/MRI in a head and neck radiotherapy setup. Radiother Oncol 2018. [DOI: 10.1016/s0167-8140(18)31459-2] [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: 10/14/2022]
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Adkin C, Premachandra P, Thomas C, Guerrero Urbano T, Lei M. PO-0706: Sensorineural hearing loss and radiotherapy for head and neck cancer. Radiother Oncol 2018. [DOI: 10.1016/s0167-8140(18)31016-8] [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: 11/17/2022]
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Lin D, Liang Y, Zheng D, Chen Y, Jing X, Lei M, Zeng Z, Zhou T, Wu X, Peng S, Huang K, Yang L, Xiao S, Liu J, Tao E. Novel biomolecular information in rotenone-induced cellular model of Parkinson's disease. Gene 2018; 647:244-260. [PMID: 29331484 DOI: 10.1016/j.gene.2018.01.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 12/19/2017] [Accepted: 01/05/2018] [Indexed: 01/12/2023]
Abstract
In order to uncover the remarkable pathogenic genes or molecular pathological process in Parkinson's disease (PD), we employed a microarray analysis upon the cellular PD model induced by rotenone. Compared to the control group, 2174 genes were screened out to be expressed differently in the rotenone-induced group by certain criterion. GO analysis and the pathways analysis showed the significant enrichment of genes that were associated with the biological process of cell cycle, apoptotic process, organelle fusion, mitochondrial lesion, endoplasmic reticulum stress and so on. Among these significant DE genes, some were sorted out to be involved in cell cycle and protein processing in endoplasmic reticulum. As the PPI network analysis showed, the interaction relationship of the DEGs involved in the process of protein generation in endoplasmic reticulum(ER) was clearly showed up. As a prediction, we emphasized the genes EDEM1, ATF4, TRAF2 might play central roles in the protein misfolding process during the progression of Parkinson's disease and these new-found genes might be the future research focus and therapeutic targets in PD.
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Affiliation(s)
- D Lin
- Department of Neurology, The Sun Yat-sen Memorial Hospital of Sun Yat-sen University, 107 Yanjiang West Road, Guangzhou 510080,China
| | - Y Liang
- Department of Neurology, The Sun Yat-sen Memorial Hospital of Sun Yat-sen University, 107 Yanjiang West Road, Guangzhou 510080,China
| | - D Zheng
- Department of Neurology, The Sun Yat-sen Memorial Hospital of Sun Yat-sen University, 107 Yanjiang West Road, Guangzhou 510080,China
| | - Y Chen
- Department of Neurology, The Sun Yat-sen Memorial Hospital of Sun Yat-sen University, 107 Yanjiang West Road, Guangzhou 510080,China
| | - X Jing
- Department of Neurology, The Sun Yat-sen Memorial Hospital of Sun Yat-sen University, 107 Yanjiang West Road, Guangzhou 510080,China
| | - M Lei
- Department of Neurology, The Sun Yat-sen Memorial Hospital of Sun Yat-sen University, 107 Yanjiang West Road, Guangzhou 510080,China
| | - Z Zeng
- Department of Neurology, The Sun Yat-sen Memorial Hospital of Sun Yat-sen University, 107 Yanjiang West Road, Guangzhou 510080,China
| | - T Zhou
- Department of Neurology, The Sun Yat-sen Memorial Hospital of Sun Yat-sen University, 107 Yanjiang West Road, Guangzhou 510080,China
| | - X Wu
- Department of Neurology, The Sun Yat-sen Memorial Hospital of Sun Yat-sen University, 107 Yanjiang West Road, Guangzhou 510080,China
| | - S Peng
- Department of Neurology, The Sun Yat-sen Memorial Hospital of Sun Yat-sen University, 107 Yanjiang West Road, Guangzhou 510080,China
| | - K Huang
- Department of Neurology, The Sun Yat-sen Memorial Hospital of Sun Yat-sen University, 107 Yanjiang West Road, Guangzhou 510080,China
| | - L Yang
- Department of Neurology, The Sun Yat-sen Memorial Hospital of Sun Yat-sen University, 107 Yanjiang West Road, Guangzhou 510080,China
| | - S Xiao
- Department of Neurology, The Sun Yat-sen Memorial Hospital of Sun Yat-sen University, 107 Yanjiang West Road, Guangzhou 510080,China
| | - J Liu
- Department of Neurology, The Sun Yat-sen Memorial Hospital of Sun Yat-sen University, 107 Yanjiang West Road, Guangzhou 510080,China
| | - E Tao
- Department of Neurology, The Sun Yat-sen Memorial Hospital of Sun Yat-sen University, 107 Yanjiang West Road, Guangzhou 510080,China; Guangdong Province Key Laboratory of Brain Function and Disease, Zhongshan School of Medicine, Sun Yat-sen University, 74 Zhongshan 2nd Road, Guangzhou 510080, China.
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47
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Wang HH, Sun X, Lin ZC, Pang ZF, Kong XQ, Lei M, Li YF. Self-assembly of highly conductive self-n-doped fullerene ammonium halides and their application in the in situ solution-processable fabrication of working electrodes for alcohol electrooxidation. RSC Adv 2018; 8:9503-9511. [PMID: 35541847 PMCID: PMC9078672 DOI: 10.1039/c8ra00100f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 01/05/2018] [Accepted: 02/20/2018] [Indexed: 01/03/2023] Open
Abstract
Self-assembled highly conductive fullerene ammonium halides are potential support of metal-based nanoparticles toward alcohol electrooxidation.
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Affiliation(s)
- H. H. Wang
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- China
| | - X. Sun
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- China
| | - Z. C. Lin
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- China
| | - Z. F. Pang
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- China
| | - X. Q. Kong
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- China
| | - M. Lei
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- China
| | - Y. F. Li
- CAS Research/Education Center for Excellence in Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
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48
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Peng S, Liang Y, Jing X, Chen Y, Lin D, Bu C, Zheng D, Huang K, Lei M, Xiao S, Yang L, Liu J, Huang S, Tao E. The MRI-based brain structure measurements in Parkinson’s disease and Parkinson-plus syndromes. Parkinsonism Relat Disord 2018. [DOI: 10.1016/j.parkreldis.2017.11.320] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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49
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Lin D, Liang Y, Jing X, Chen Y, Lei M, Zeng Z, Zhou T, Wu X, Peng S, Zheng D, Huang K, Yang L, Xiao S, Liu J, Tao E. Microarray analysis of an synthetic α-synuclein induced cellular model reveals the expression profile of long non-coding RNA in Parkinson's disease. Brain Res 2017; 1678:384-396. [PMID: 29137975 DOI: 10.1016/j.brainres.2017.11.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [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: 08/07/2017] [Revised: 11/07/2017] [Accepted: 11/08/2017] [Indexed: 01/10/2023]
Abstract
Long non-coding RNAs (lncRNAs) are a new research focus that are reported to influence the pathogenetic process of neurodegenerative disorders. To uncover new disease-associated genes and their relevant mechanisms, we carried out a gene microarray analysis based on a Parkinson's disease (PD) in vitro model induced by α-synuclein oligomers. This cellular model induced by 25 μmol/L α-synuclein oligomers has been confirmed to show the stable, transmissible neurotoxicity of α-synuclein, a typical PD pathological marker. And several differentially expressed lncRNAs and mRNAs were identified in this model, such as G046036, G030771, AC009365.4, RPS14P3, CTB-11I22.1, and G007549. Subsequent ceRNA analysis determined the potential relationships between these lncRNAs and their associated mRNAs and microRNAs. The results of the present study widen our horizon of PD susceptibility genes and provide new pathways towards efficient diagnostic biomarkers and therapeutic targets for PD.
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Affiliation(s)
- D Lin
- Department of Neurology, The Sun Yat-sen Memorial Hospital of Sun Yat-sen University, 107 Yanjiang West Road, Guangzhou 510080, China
| | - Y Liang
- Department of Neurology, The Sun Yat-sen Memorial Hospital of Sun Yat-sen University, 107 Yanjiang West Road, Guangzhou 510080, China
| | - X Jing
- Department of Neurology, The Sun Yat-sen Memorial Hospital of Sun Yat-sen University, 107 Yanjiang West Road, Guangzhou 510080, China
| | - Y Chen
- Department of Neurology, The Sun Yat-sen Memorial Hospital of Sun Yat-sen University, 107 Yanjiang West Road, Guangzhou 510080, China
| | - M Lei
- Department of Neurology, The Sun Yat-sen Memorial Hospital of Sun Yat-sen University, 107 Yanjiang West Road, Guangzhou 510080, China
| | - Z Zeng
- Department of Neurology, The Sun Yat-sen Memorial Hospital of Sun Yat-sen University, 107 Yanjiang West Road, Guangzhou 510080, China
| | - T Zhou
- Department of Neurology, The Sun Yat-sen Memorial Hospital of Sun Yat-sen University, 107 Yanjiang West Road, Guangzhou 510080, China
| | - X Wu
- Department of Neurology, The Sun Yat-sen Memorial Hospital of Sun Yat-sen University, 107 Yanjiang West Road, Guangzhou 510080, China
| | - S Peng
- Department of Neurology, The Sun Yat-sen Memorial Hospital of Sun Yat-sen University, 107 Yanjiang West Road, Guangzhou 510080, China
| | - D Zheng
- Department of Neurology, The Sun Yat-sen Memorial Hospital of Sun Yat-sen University, 107 Yanjiang West Road, Guangzhou 510080, China
| | - K Huang
- Department of Neurology, The Sun Yat-sen Memorial Hospital of Sun Yat-sen University, 107 Yanjiang West Road, Guangzhou 510080, China
| | - L Yang
- Department of Neurology, The Sun Yat-sen Memorial Hospital of Sun Yat-sen University, 107 Yanjiang West Road, Guangzhou 510080, China
| | - S Xiao
- Department of Neurology, The Sun Yat-sen Memorial Hospital of Sun Yat-sen University, 107 Yanjiang West Road, Guangzhou 510080, China
| | - J Liu
- Department of Neurology, The Sun Yat-sen Memorial Hospital of Sun Yat-sen University, 107 Yanjiang West Road, Guangzhou 510080, China
| | - E Tao
- Department of Neurology, The Sun Yat-sen Memorial Hospital of Sun Yat-sen University, 107 Yanjiang West Road, Guangzhou 510080, China; Guangdong Province Key Laboratory of Brain Function and Disease, Zhongshan School of Medicine, Sun Yat-sen University, 74 Zhongshan 2nd Road, Guangzhou 510080, China.
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50
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You Y, Li Y, Li M, Lei M, Wu M, Qu Y, Yuan Y, Chen T, Jiang H. Ovarian cancer stem cells promote tumour immune privilege and invasion via CCL5 and regulatory T cells. Clin Exp Immunol 2017; 191:60-73. [PMID: 28868628 DOI: 10.1111/cei.13044] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/29/2017] [Indexed: 12/18/2022] Open
Abstract
Emerging evidence indicates a link between the increased proportion of regulatory T cells (Tregs ) and reduced survival in patients who have been diagnosed with cancer. Cancer stem cells (CSCs) have been indicated to play a vital role in tumour initiation, drug resistance and recurrence. However, the relationship between Tregs and CSCs remains largely unknown. Here, we sorted out ovarian cancer stem-like side population (SP) cells and CD133+ cells to investigate the influence of ovarian CSCs on Tregs . Among the various immune-related molecules that we assessed, C-C motif chemokine ligand 5 (CCL5) was the most elevated in ovarian CSCs relative to that in the non-CSCs. The expression of its receptor, C-C motif chemokine receptor 5 (CCR5), was also increased on the surface of Tregs in ovarian cancer patients. This receptor-ligand expression profile indicated that ovarian CSCs recruit Tregs via CCL5-CCR5 interactions. We further assessed the expression of interleukin (IL)-10 in Tregs cultured with different cancer cells. Tregs cultured in conditioned medium (CM) from ovarian CD133+ cells expressed a higher level of IL-10 than Tregs cultured in CM from CD133- cells, indicating that Tregs exert pronounced immune-inhibitory functions in CSC-rich environments. Furthermore, co-culture with ovarian cancer cell lines induced the expression of matrix metalloproteinase-9 (MMP9) in Tregs which, in turn, enhanced the degradation of the extracellular matrix and enabled the invasion of tumour cells, thereby facilitating tumour metastasis. For the first time, to our knowledge, our findings describe the relationship between ovarian CSCs and Tregs , and demonstrated that these two cell populations co-operate to promote tumour immune tolerance and enhance tumour progression.
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Affiliation(s)
- Y You
- Department of Gynecology, Obstetrics and Gynecology Hospital, Fudan University, Shanghai, China
| | - Y Li
- Department of Gynecology, Obstetrics and Gynecology Hospital, Fudan University, Shanghai, China
| | - M Li
- Department of Gynecology, Obstetrics and Gynecology Hospital, Fudan University, Shanghai, China
| | - M Lei
- Department of Gynecology, Obstetrics and Gynecology Hospital, Fudan University, Shanghai, China
| | - M Wu
- Department of Hematology, Huashan Hospital, Fudan University, Shanghai, China
| | - Y Qu
- Department of Hematology, Huashan Hospital, Fudan University, Shanghai, China
| | - Y Yuan
- Department of Hematology, Huashan Hospital, Fudan University, Shanghai, China
| | - T Chen
- Department of Hematology, Huashan Hospital, Fudan University, Shanghai, China
| | - H Jiang
- Department of Gynecology, Obstetrics and Gynecology Hospital, Fudan University, Shanghai, China
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