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Chen LA, Yu YH, Tian WT, Lin WC, Grauffel C, Wu CY, Chen CL, Lim C, Chu HM, Chang TW, Peng CJ. Site-specific Conjugation of 6 DOTA Chelators to a CA19-9-targeting scFv-Fc Antibody for Imaging and Therapy. J Med Chem 2023; 66:10604-10616. [PMID: 37462154 PMCID: PMC10424180 DOI: 10.1021/acs.jmedchem.3c00753] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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: 04/27/2023] [Indexed: 08/11/2023]
Abstract
Antibodies conjugated with diagnostic/therapeutic radionuclides are attractive options for inoperable cancers lacking accurate imaging methods and effective therapeutics, such as pancreatic cancer. Hence, we have produced an antibody radionuclide conjugate termed TE-1132 comprising a α-CA19-9 scFv-Fc that is site-specifically conjugated at each C-terminus to 3 DOTA chelators via a cysteine-containing peptide linker. The smaller scFv-Fc size facilitates diffusivity within solid tumors, whereas the chelator-to-antibody ratio of six enabled 177Lu-radiolabeled TE-1132 to exhibit high radioactivity up to 520 MBq/nmol. In mice bearing BxPC3 tumors, immuno-SPECT/CT imaging of [111In]In-TE-1132 and the biodistribution of [177Lu]Lu-TE-1132 showed selective tumor accumulation. Single and multiple doses of [177Lu]Lu-TE-1132 effectively inhibited the BxPC3 tumor growth and prolonged the survival of mice with no irreversible body weight loss or hematopoietic damage. The adequate pharmacokinetic parameters, prominent tumor accumulation, and efficacy with good safety in mice encourage the further investigation of theranostic TE-1132 for treating pancreatic cancer.
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Affiliation(s)
- Li-An Chen
- Immunwork,
Inc., Academia Rd., Sec.
1, Nangang, Taipei 11571, Taiwan
| | - Yueh-Hsiang Yu
- Immunwork,
Inc., Academia Rd., Sec.
1, Nangang, Taipei 11571, Taiwan
| | - Wei-Ting Tian
- Immunwork,
Inc., Academia Rd., Sec.
1, Nangang, Taipei 11571, Taiwan
| | - Wei-Chen Lin
- Immunwork,
Inc., Academia Rd., Sec.
1, Nangang, Taipei 11571, Taiwan
| | - Cédric Grauffel
- Immunwork,
Inc., Academia Rd., Sec.
1, Nangang, Taipei 11571, Taiwan
| | - Chun-Yi Wu
- Department
of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Beitou, Taipei 112, Taiwan
| | - Chuan-Lin Chen
- Department
of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Beitou, Taipei 112, Taiwan
| | - Carmay Lim
- Institute
of Biomedical Sciences, Academia Sinica, Academia Road, Taipei 115, Taiwan
| | - Hsing-Mao Chu
- Immunwork,
Inc., Academia Rd., Sec.
1, Nangang, Taipei 11571, Taiwan
| | - Tse-Wen Chang
- Immunwork,
Inc., Academia Rd., Sec.
1, Nangang, Taipei 11571, Taiwan
| | - Chi-Jiun Peng
- Immunwork,
Inc., Academia Rd., Sec.
1, Nangang, Taipei 11571, Taiwan
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2
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Chen LA, She DY, Liang ZX, Liang LL, Chen RC, Ye F, Li YP, Zhou Y, Chen XH, Fang SF, Lai GX, Hu Q, Xie BS, Yao XJ, Shi Y, Su X, He LX, Zhou JY, Zhong SC, Zhang QL, Xiong SD, Qu JM, Tong ZH, Jiang SJ, Liu J, Xu F, He B, Li ER, Yuan YD, Zhang XY, Sun TY, Liu YN. [A prospective multi-center clinical investigation of HIV-negative pulmonary cryptococcosis in China]. Zhonghua Jie He He Hu Xi Za Zhi 2021; 44:14-27. [PMID: 33412620 DOI: 10.3760/cma.j.cn112147-20200122-00034] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the current status of the diagnosis and treatment of pulmonary cryptococcosis in respiratory medicine and improve the understanding of the clinical characteristics of HIV-negative pulmonary cryptococcosis in China. Methods: A prospective multi-center open cohort study was designed to screen for pulmonary cryptococcosis in the general wards and intensive care units of the Department of Respiratory Diseases in 22 hospitals. The HIV-negative patients with positive cryptococcal etiological diagnosis based on smear culture, antigen detection and histopathology were enrolled in the study. The clinical data of enrolled patients were collected and analyzed. Results: A total of 457 cases of pulmonary cryptococcosis were enrolled, among which 3.28% (15/457) were disseminated infections. The case fatality rate was 0.88% (4/457). The majority of the cases were diagnosed by histopathological examinations (74.40%, 340/457) and cryptococcus antigen detection (37.64%, 172/457). Patients with pulmonary cryptococcosis accounted for 2.04‰ (457/223 748) of the total hospitalized patients in the Department of Respiratory Diseases during the same period, and the ratio was the highest in south and east China. Meanwhile, 70.24% (321/457) of the patients had no underlying diseases, while 87.75% (401/457) were found to have immunocompetent status. Cough and expectoration were the most common clinical symptoms in patients with pulmonary cryptococcosis. However, 25.16% (115/457) of the patients had no clinical symptom or physical signs. In terms of imaging features on pulmonary CT, multiple pulmonary lesions were more common than isolated lesions, and there were more subpleural lesions than perihilar or medial lesions. Morphologically, most of the lesions were middle-sized nodules (1-5 cm) or small-sized nodules (3 mm to 1 cm). The sensitivity of serum cryptococcus antigen test was 71.99% (203/282). Moreover, antigen-positive patients differed from antigen-negative patients in terms of basic immune status, clinical symptoms, imaging features and infection types. Meanwhile, immunocompromised patients differed from immunocompetent patients in terms of clinical symptoms, physical signs, infection-related inflammation indicator levels, imaging features, serum cryptococcus antigen positive rate and prognosis. Conclusions: The majority of cases of HIV-negative pulmonary cryptococcosis in China had no underlying disease or immunocompromised status, and the overrall prognosis was favorable. However, early diagnosis of HIV-negative pulmonary cryptococcosis remains challenging due to the complicated manifestations of the disease.
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Affiliation(s)
- L A Chen
- Department of Pulmonary and Critical Care Medicine, the First Medical Center of General Hospital of Chinese People's Liberation Army, Beijing 100853, China
| | - D Y She
- Department of Pulmonary and Critical Care Medicine, the First Medical Center of General Hospital of Chinese People's Liberation Army, Beijing 100853, China
| | - Z X Liang
- Department of Pulmonary and Critical Care Medicine, the First Medical Center of General Hospital of Chinese People's Liberation Army, Beijing 100853, China
| | - L L Liang
- Department of Pulmonary and Critical Care Medicine, the First Medical Center of General Hospital of Chinese People's Liberation Army, Beijing 100853, China
| | - R C Chen
- Guangzhou Institute of Respiratory Health, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510120, China
| | - F Ye
- Guangzhou Institute of Respiratory Health, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510120, China
| | - Y P Li
- Department of Pulmonary and Critical Care Medicine, the First Affiliated Hospital of Wenzhou Medical University,Wenzhou 325000, China
| | - Y Zhou
- Department of Pulmonary and Critical Care Medicine, the First Affiliated Hospital of Wenzhou Medical University,Wenzhou 325000, China
| | - X H Chen
- Department of Pulmonary and Critical Care Medicine, Fuzhou Pulmonary Hospital of Fujian, Fuzhou 350008, China
| | - S F Fang
- Department of Pulmonary and Critical Care Medicine, Fuzhou Pulmonary Hospital of Fujian, Fuzhou 350008, China
| | - G X Lai
- Department of Pulmonary and Critical Care Medicine, 900 Hospital of the Joint Logistics Team Support Force,Fuzhou 350025, China
| | - Q Hu
- Department of Pulmonary and Critical Care Medicine, 900 Hospital of the Joint Logistics Team Support Force,Fuzhou 350025, China
| | - B S Xie
- Department of Pulmonary and Critical Care Medicine, Fujian Provincial Hospital,Fuzhou 350001, China
| | - X J Yao
- Department of Pulmonary and Critical Care Medicine, Fujian Provincial Hospital,Fuzhou 350001, China
| | - Y Shi
- Department of Pulmonary and Critical Care Medicine, the General Hospital of Eastern Theater Command;,Nanjing 210002, China
| | - X Su
- Department of Pulmonary and Critical Care Medicine, the General Hospital of Eastern Theater Command;,Nanjing 210002, China
| | - L X He
- Department of Pulmonary and Critical Care Medicine, Zhongshan Hospital, Fudan University,Shanghai 200032, China
| | - J Y Zhou
- Department of Pulmonary and Critical Care Medicine, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China
| | - S C Zhong
- Department of Pulmonary and Critical Care Medicine, Longyan First Hospital,Longyan 364000, China
| | - Q L Zhang
- Department of Neurology Medicine, Jiangxi Chest Hospital,Nanchang 330006, China
| | - S D Xiong
- Department of Pulmonary and Critical Care Medicine, Tongji Hospital Affiliated to Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - J M Qu
- Department of Pulmonary and Critical Care Medicine, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, China
| | - Z H Tong
- Department of Pulmonary and Critical Care Medicine, Beijing Chao-Yang Hospital, Capital Medical University,Beijing 100020, China
| | - S J Jiang
- Department of Pulmonary and Critical Care Medicine, Shandong Provincial Hospital,Jinan 250021, China
| | - J Liu
- Department of Pulmonary and Critical Care Medicine, the Second Hospital of Jilin University, Changchun 130041, China
| | - F Xu
- Department of Pulmonary and Critical Care Medicine, the First Affiliated Hospital of Nanchang University,Nanchang 330006, China
| | - B He
- Department of Pulmonary and Critical Care Medicine, Peking University Third Hospital,Beijing 100191, China
| | - E R Li
- Department of Pulmonary and Critical Care Medicine, the First Hospital of China Medical University,Shenyang 110001, China
| | - Y D Yuan
- Department of Pulmonary and Critical Care Medicine, the Second Hospital of Hebei Medical University, Shijiazhuang 050000, China
| | - X Y Zhang
- Department of Pulmonary and Critical Care Medicine, Guzhou Provincial People's Hospital,Guiyang 550002, China
| | - T Y Sun
- Department of Pulmonary and Critical Care Medicine, Beijing Hospital,Beijing 100730, China
| | - Y N Liu
- Department of Pulmonary and Critical Care Medicine, the First Medical Center of General Hospital of Chinese People's Liberation Army, Beijing 100853, China
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Wang JX, Zhang FC, Liu XQ, Tang CW, Chen LA, Han Y. [Expert consensus for diagnosis and treatment of thrombocytopenia in China]. Zhonghua Nei Ke Za Zhi 2020; 59:498-510. [PMID: 32594683 DOI: 10.3760/cma.j.cn112138-20200424-00419] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Thrombocytopenia is the main clinical manifestation or common complication of multiple diseases, but there is still a lack of systematic understanding of pathogenesis, underlying diseases and treatment strategies of thrombocytopenia. Based on evidence-based medicine, this consensus summarizes seven aspects related to thrombocytopenia, including definition, epidemiology, pathogenesis, clinical manifestations, laboratory examination, diagnosis and treatment. This consensus provides an important reference for the diagnosis and treatment of thrombocytopenia.
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Affiliation(s)
| | - J X Wang
- Institute of Hematology and Blood Diseases Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Tianjin 300020, China
| | - F C Zhang
- Department of Rheumatology and Clinical Immunology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - X Q Liu
- Department of Infectious Diseases, Department of Clinical Epidemiology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - C W Tang
- Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - L A Chen
- Department of Respiratory and Critical Care Medicine, The First Medical Center of Chinese PLA General Hospital, Beijing 100853, China
| | - Y Han
- Department of Gastroenterology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China
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4
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Venault A, Chen LA, Maggay IV, Marie Yap Ang MB, Chang HY, Tang SH, Wang DM, Chou CJ, Bouyer D, Quémener D, Lee KR, Chang Y. Simultaneous amphiphilic polymer synthesis and membrane functionalization for oil/water separation. J Memb Sci 2020. [DOI: 10.1016/j.memsci.2020.118069] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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5
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Chen LA. [Immunotherapy--opening a new era of lung cancer therapy]. Zhonghua Jie He He Hu Xi Za Zhi 2020; 43:83-86. [PMID: 32062876 DOI: 10.3760/cma.j.issn.1001-0939.2020.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
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6
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Chen LA, Cheng JS, Chu JC. Ensuring health equality for inmates at correctional institutions in Taiwan. J Formos Med Assoc 2019; 118:1175-1176. [PMID: 31104871 DOI: 10.1016/j.jfma.2019.04.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 04/24/2019] [Accepted: 04/26/2019] [Indexed: 06/09/2023] Open
Affiliation(s)
- Li-An Chen
- The Ph.D. Program in Strategy and Development of Emerging Industries, National Chi Nan University, Nantou, Taiwan, ROC
| | - Jen-Son Cheng
- The Ph.D. Program in Strategy and Development of Emerging Industries, National Chi Nan University, Nantou, Taiwan, ROC
| | - Jih-Chiao Chu
- Department of Social Insurance, Ministry of Health and Welfare, Taipei, Taiwan, ROC; Department of Health-Business Administration, Hungkuang University, Taichung, Taiwan, ROC.
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7
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Chen LA. [Early diagnosis and treatmet of lung cancer: the responsibility of respiratory physician]. Zhonghua Jie He He Hu Xi Za Zhi 2018; 41:753-754. [PMID: 30347545 DOI: 10.3760/cma.j.issn.1001-0939.2018.10.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
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8
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Ungaro R, Fausel R, Chang HL, Chang S, Chen LA, Nakad A, El Nawar A, Prytz Berset I, Axelrad J, Lawlor G, Atreja A, Roque Ramos L, Torres J, Colombel JF. Bariatric surgery is associated with increased risk of new-onset inflammatory bowel disease: case series and national database study. Aliment Pharmacol Ther 2018; 47:1126-1134. [PMID: 29512187 DOI: 10.1111/apt.14569] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Revised: 08/25/2017] [Accepted: 01/19/2018] [Indexed: 02/06/2023]
Abstract
BACKGROUND Case series suggest a possible association between bariatric surgery and incident IBD. AIM The aim of this study was to evaluate the association between bariatric surgery and new-onset IBD. METHODS We first conducted a multi-institutional case series of patients with a history of IBD and bariatric surgery. We next conducted a matched case-control study using medical and pharmacy claims from 2008 to 2012 in a US national database from Source Healthcare Analytics LLC. Bariatric surgery was defined by ICD-9 or CPT code. Bariatric surgery was evaluated as recent (code in database timeframe), past (past history V code) or no history. Conditional logistic regression was used to estimate odds ratios (OR) and 95% CI for new-onset IBD, CD and UC. RESULTS A total of 15 cases of IBD (10 CD, 4 UC, 1 IBD, type unclassified) with a prior history of bariatric surgery were identified. Most cases were women, had Roux-en-Y surgery years prior to diagnosis and few IBD-related complications. A total of 8980 cases and 43 059 controls were included in our database analysis. Adjusting for confounders, a past history of bariatric surgery was associated with an increased risk of new-onset IBD (OR 1.93, 95% CI 1.34-2.79). However, patients who had recent bariatric surgery did not appear to be at shorter term risk of IBD (OR 0.94, 95% CI 0.58-1.52). CONCLUSION New-onset IBD was significantly associated with a past history of bariatric surgery. This potential association needs to be confirmed in future prospective studies.
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Affiliation(s)
- R Ungaro
- Division of Gastroenterology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - R Fausel
- Division of Gastroenterology, Icahn School of Medicine at Mount Sinai, New York, NY, USA.,The Oregon Clinic, Portland, OR, USA
| | - H L Chang
- Department of Population Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - S Chang
- New York University School of Medicine, New York, NY, USA
| | - L A Chen
- New York University School of Medicine, New York, NY, USA
| | - A Nakad
- CHwapi Notre Dame, Tournai, Belgium
| | | | | | - J Axelrad
- Columbia University Medical Center/NY-Presbyterian Hospital, New York, NY, USA
| | - G Lawlor
- Columbia University Medical Center/NY-Presbyterian Hospital, New York, NY, USA
| | - A Atreja
- Division of Gastroenterology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | | | - J Torres
- Division of Gastroenterology, Icahn School of Medicine at Mount Sinai, New York, NY, USA.,Hospital Beatriz Ângelo, Loures, Portugal
| | - J-F Colombel
- Division of Gastroenterology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
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9
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Li Y, Chen LA. [Precise therapy for lung cancer patients with rare sensitive mutations of epidermal growth factor receptor]. Zhonghua Zhong Liu Za Zhi 2017; 39:881-884. [PMID: 29262502 DOI: 10.3760/cma.j.issn.0253-3766.2017.12.001] [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] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Precise medicine is an emerging clinical therapeutic concept based on genomic and genetic information of patients. Epidermal growth factor receptor tyrosine kinase inhibitors (EGFR-TKIs) is an important component of precise therapy for lung cancer patients. EGFR mutations occur mainly in exon 18 to 21, in which exon 19 deletion and exon 21 L858R point mutation that are known as sensitive mutations account for nearly 45% and 40%, respectively. Except for the above two mutations and T790M point mutation, the rest are rare mutations, including Ins19, Ins20, E709, G719, S768, L861 and some compound mutations. Some previous retrospective studies of small sample size and case reports showed that most of EGFR exon19 (Ins), exon 21 (L861), exon 18 (G719X) and exon20 (S768I) mutations were sensitive to TKIs. And although the exon 20 insertion mutation is usually predicted to the first and second generations of EGFR-TKIs resistance, some specific types are sensitive to the third generation of EGFR-TKIs. Currently, targeted drugs for Ins20 -Ap32788 mutation has entered into clinical trials. Patients with complex mutations have similar efficacy on EGFR-TKIs in comparison with those with single sensitivity mutations. In conclusion, when patients with rare sensitive mutations received EGFR-TKIs therapy, the efficacy and progression-free survival time is similar to or slightly lower than those with classical sensitive mutations, whereas it is higher than those with wild-type EGFR. Compared with the first generation of EGFR-TKIs, second generation EGFR-TKIs may be more suitable for the treatment of lung cancer patients harboring rare sensitive EGFR mutations.
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Affiliation(s)
- Y Li
- Department of Respiratory Diseases, Chinese PLA General Hospital, Beijing 100853, China (Currently address: Department of Respiratory Diseases, 309 Hospital of PLA, Beijing 100091, China)
| | - L A Chen
- Department of Respiratory Diseases, Chinese PLA General Hospital, Beijing 100853, China
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10
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Carretier S, Chen LA, Venault A, Yang ZR, Aimar P, Chang Y. Design of PVDF/PEGMA-b-PS-b-PEGMA membranes by VIPS for improved biofouling mitigation. J Memb Sci 2016. [DOI: 10.1016/j.memsci.2016.03.017] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [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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11
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Hu Y, Li CS, Li YQ, Liang Y, Cao L, Chen LA. Perfluorocarbon inhibits lipopolysaccharide-induced macrophage inflammatory protein-2 expression and activation of ATF-2 and c-Jun in A549 pulmonary epithelial cells. Cell Mol Biol (Noisy-le-grand) 2016; 62:18-24. [PMID: 27188729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Accepted: 04/05/2016] [Indexed: 06/05/2023]
Abstract
The signaling pathway that mediates the anti-inflammatory effects of perfluorocarbon (PFC) in alveolar epithelial cells treated with lipopolysaccharide (LPS) remains unclear. To evaluate the role of macrophage-inflammatory protein-2 (MIP-2), four A549 treatment groups were utilized: (1) untreated control, (2) 10 μg/mL of LPS, (3) 10 μg/mL of LPS+30% PFC and (4) 30% PFC. MIP-2 mRNA expression was determined by qPCR and ELISA. Mitogen-activated protein kinase (MAPK) activation was determined by Western blot analysis, and MIP-2 expression was determined by qPCR following treatment with MAPK inhibitors. PFC suppressed LPS-induced MIP-2 mRNA levels (P≤0.035) and MIP-2 secretion (P≤0.046). LPS induced ATF-2 and c-Jun phosphorylation, which was suppressed by PFC. Finally, inhibitors of ERK, JNK, and p38 suppressed LPS-induced MIP-2 mRNA expression. Thus, PFC inhibits LPS-induced MIP-2 expression and ATF-2 and c-Jun phosphorylation. To fully explore the therapeutic potential of PFC for acute lung injury (ALI), in vivo analyses are required to confirm these effects.
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Affiliation(s)
- Y Hu
- Chinese People's Liberation Army General Hospital Department of Pulmonary Medicine Beijing China
| | - C S Li
- Chinese People's Liberation Army General Hospital Department of Pulmonary Medicine Beijing China
| | - Y Q Li
- Chinese People's Liberation Army General Hospital Department of Pulmonary Medicine Beijing China
| | - Y Liang
- Chinese People's Liberation Army General Hospital Department of Pulmonary Medicine Beijing China
| | - L Cao
- Chinese People's Liberation Army General Hospital Department of Pulmonary Medicine Beijing China
| | - L A Chen
- Chinese People's Liberation Army General Hospital Department of Pulmonary Medicine Beijing China
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13
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Hourigan SK, Chen LA, Grigoryan Z, Laroche G, Weidner M, Sears CL, Oliva-Hemker M. Microbiome changes associated with sustained eradication of Clostridium difficile after single faecal microbiota transplantation in children with and without inflammatory bowel disease. Aliment Pharmacol Ther 2015. [PMID: 26198180 DOI: 10.1111/apt.13326] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND Little data are available regarding the effectiveness and associated microbiome changes of faecal microbiota transplantation (FMT) for Clostridium difficile infection (CDI) in children, especially in those with inflammatory bowel disease (IBD) with presumed underlying dysbiosis. AIM To investigate C. difficile eradication and microbiome changes with FMT in children with and without IBD. METHODS Children with a history of recurrent CDI (≥3 recurrences) underwent FMT via colonoscopy. Stool samples were collected pre-FMT and post-FMT at 2-10 weeks, 10-20 weeks and 6 months. The v4 hypervariable region of the 16S rRNA gene was sequenced. C. difficile toxin B gene polymerase chain reaction was performed. RESULTS Eight children underwent FMT for CDI; five had IBD. All had resolution of CDI symptoms. All tested had eradication of C. difficile at 10-20 weeks and 6 months post-FMT. Pre-FMT patient samples had significantly decreased bacterial richness compared with donors (P = 0.01), in those with IBD (P = 0.02) and without IBD (P = 0.01). Post-FMT, bacterial diversity in patients increased. Six months post-FMT, there was no significant difference between bacterial diversity of donors and patients without IBD; however, bacterial diversity in those with IBD returned to pre-FMT baseline. Microbiome composition at 6 months in IBD-negative patients more closely approximated donor composition compared to IBD-positive patients. CONCLUSIONS FMT gives sustained C. difficile eradication in children with and without IBD. FMT-restored diversity is sustained in children without IBD. In those with IBD, bacterial diversity returns to pre-FMT baseline by 6 months, suggesting IBD host-related mechanisms modify faecal microbiome diversity.
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Affiliation(s)
- S K Hourigan
- Johns Hopkins School of Medicine, Baltimore, MD, USA.,Pediatric Specialists of Virginia, Fairfax, VA, USA
| | - L A Chen
- Johns Hopkins School of Medicine, Baltimore, MD, USA.,NYU School of Medicine, New York, NY, USA
| | | | - G Laroche
- Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - M Weidner
- Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - C L Sears
- Johns Hopkins School of Medicine, Baltimore, MD, USA
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Chen LA, Van Meerbeke S, Albesiano E, Goodwin A, Wu S, Yu H, Carroll K, Sears C. Fecal detection of enterotoxigenic Bacteroides fragilis. Eur J Clin Microbiol Infect Dis 2015; 34:1871-7. [PMID: 26173688 DOI: 10.1007/s10096-015-2425-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [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: 04/06/2015] [Accepted: 06/04/2015] [Indexed: 01/14/2023]
Abstract
Bacteroides fragilis is a common colonic symbiote of which one subtype, enterotoxigenic Bacteroides fragilis (ETBF), causes inflammatory diarrhea. However, asymptomatic ETBF colonization is common. Through its primary virulence factor, B. fragilis toxin (BFT), ETBF causes asymptomatic, chronic colitis in C57BL/6 mice and increased colon tumorigenesis in multiple intestinal neoplasia mice. Human studies suggest an association between ETBF infection, inflammatory bowel disease, and colon cancer. Additional studies on ETBF epidemiology are, therefore, crucial. The goal of this study is to develop a reliable fecal diagnostic for ETBF. To develop a sensitive assay for ETBF, we tested multiple protocols on mouse stools spiked with serially diluted ETBF. Each assay was based on either touchdown or quantitative polymerase chain reaction (qPCR) and used primers targeted to bft to detect ETBF. Using touchdown PCR or qPCR, the mean ETBF detection limit was 1.55 × 10(6) colony-forming units (CFU)/g stool and 1.33 × 10(4) CFU/g stool, respectively. Augmentation of Bacteroides spp. growth in fecal samples using PYGB (Peptone Yeast Glucose with Bile) broth enhanced ETBF detection to 2.93 × 10(2) CFU/g stool using the touchdown PCR method and 2.63 × 10(2) CFU/g stool using the qPCR method. Fecal testing using combined culture-based amplification and bft touchdown PCR is a sensitive assay for the detection of ETBF colonization and should be useful in studying the role of ETBF colonization in intestinal diseases, such as inflammatory bowel disease and colon cancer. We conclude that touchdown PCR with culture-based amplification may be the optimal ETBF detection strategy, as it performs as well as qPCR with culture-based amplification, but is a less expensive technique.
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Affiliation(s)
- L A Chen
- Department of Medicine, Johns Hopkins School of Medicine, CRB2 Bldg, Suite 1M.05, 1550 Orleans Street, Baltimore, MD, 21231, USA
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Abstract
Sixty-four mothers of children ranging in age from 6 to 58 months were asked to determine, for pairings of play and language items, which item was more advanced developmentally. This procedure was repeated within 2 weeks. In general, mothers' orderings of play and language items matched those established in the developmental literature and were stable over the short term. Mothers' knowledge about language development was stronger than and unrelated to their knowledge about play, suggesting that maternal knowledge about developmental domains is differentiated and specific. Finally, mothers' judgments about the developmental milestones depended on their children's current developmental stage: Mothers were less accurate at estimating the timing of milestones that their children had mastered many months earlier, supporting the view that mothers' knowledge is informed by their children's recent rather than past achievements in specific areas.
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Affiliation(s)
- C S Tamis-LeMonda
- Department of Applied Psychology, New York University, New York 10003, USA.
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16
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Gong QY, Chen LA, Li JZ, Xu WH, Yang ZC. Effects of endothelin-1 on isolated uterine horns in estrogen-primed and pregnant mice. Zhongguo Yao Li Xue Bao 1994; 15:129-32. [PMID: 8010105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Mouse uterine horns from 4 states (estrogen-primed and early-, mid-, and late-pregnancy) were used to study the effect of endothelin-1 (ET) vs carboprost (Car) and oxytocin (Oxy). In K(+)-Krebs (KCl 40 mmol.L-1) solution, ET (1-300 nmol.L-1), Car (0.002-20 mumol.L-1), and Oxy (0.6-60 nmol.L-1) evoked concentration-dependent increases in tension of the uterine horns from 4 different states. Emax for ET were 1.12 +/- 0.26, 1.27 +/- 0.18, and 1.49 +/- 0.13 g in early-, mid-, and late-pregnancies, respectively. Emax for Car in mid- was twice that in late-pregnancy, whereas Emax for Oxy in late- was thrice that in mid-pregnancy. EC50 for ET were 9.6, 5.8, and 6.3 nmol.L-1 in early-, mid-, and late-pregnancies, respectively, and were only 2% to 7% of that for Car and 3-15 times of that for Oxy in various gravid stages. The results suggest that the contractile activity of pregnant mouse uterus to ET is more potent than that of Car while slightly weaker than that of Oxy.
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Affiliation(s)
- Q Y Gong
- Department of Pharmacology, School of Basic Medical Sciences, Shanghai Medical University, China
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17
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Liu YN, Chen LA. [Complications of mechanical ventilation. A clinical analysis of 82 cases]. Zhonghua Nei Ke Za Zhi 1991; 30:692-4, 730. [PMID: 1815873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The complications of mechanical ventilation were analysed retrogradely in 82 cases with respiratory failure treated in ICU in recent 5 years. There were 48 males and 34 females ranging from 28 to 82 years of age (mean age: 57.1 +/- 16.8). In 82 cases, 6 cases had complications of barotrauma, 39 cases, of infections, 15 cases, of hypotension, 24 cases, of arrhythmia, 14 cases, of upper gastrointestinal hemorrhage and 10 cases, of multiple organ failure. The total incidence of complication was 76.8%. Exactly within three days of mechanical ventilation, the incidence of complication was 31.3%, while beyond three days, it was 87.9%. It was indicated that the mortality increased significantly in the cases with severe complications such as, multiple organ failure. The causes of all kinds of complications and their prevention as well as treatments were discussed.
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Affiliation(s)
- Y N Liu
- Department of Pulmonary Medicine, General Hospital of PLA, Beijing
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Chen LA, Vatner DE, Vatner SF, Hittinger L, Homcy CJ. Decreased Gs alpha mRNA levels accompany the fall in Gs and adenylyl cyclase activities in compensated left ventricular hypertrophy. In heart failure, only the impairment in adenylyl cyclase activation progresses. J Clin Invest 1991; 87:293-8. [PMID: 1824633 PMCID: PMC295048 DOI: 10.1172/jci114985] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
We have previously reported that there is a global reduction in adenylyl cyclase associated with a decrement in Gs functional activity in cardiac sarcolemma from animals with pressure overload-induced hypertrophy and heart failure. This study was performed to determine whether hypertrophy alone in the absence of heart failure is sufficient to promote these changes and whether the superimposition of heart failure intensified these changes. Basal and stimulated adenylyl cyclase and Gs activity, as determined in the S49 cyc- reconstitution assay, were measured in sarcolemma from normal (NL), left ventricular hypertrophy (LVH) and heart failure (HF) animals. Simultaneously, we measured the mRNA level encoding for the Gs alpha subunit. These studies indicate that Gs activity and Gs alpha mRNA are decreased by approximately 30% both in the failing heart and even in the heart with compensated hypertrophy before heart failure develops (Gs activity, pmol cyclic AMP/10 min per microgram, NL 4.2 +/- 0.4, LVH 3.0 +/- 0.2, HF 3.2 +/- 0.3; Gs alpha mRNA, pg/10 micrograms RNA, NL 131 +/- 9.0, LVH 104 +/- 7.4, HF 97.4 +/- 9.1; P less than 0.05 as compared with NL for LVH and HF). Accompanying this decrement in Gs activity is a fall in adenylyl cyclase, both basal and stimulated. However, we also identified a further decrease in adenylyl cyclase without any additional change in Gs or in its alpha subunit mRNA level. This is seen only in the sarcolemma from animals with heart failure as compared with those with compensated LV hypertrophy (e.g., NaF-stimulated activity, pmol cyclic AMP/min per mg, NL 420.2 +/- 17.5, LVH 347.1 +/- 29.6, HF 244.2 +/- 27.3; P less than 0.05 compared with NL for LVH and HF, P less than 0.05 compared with LVH for HF). In summary, these studies indicate that both Gs and adenylyl cyclase activities fall in parallel with the development of LV hypertrophy followed by a further decrement in adenylyl cyclase, independent of Gs, in the setting of heart failure.
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Affiliation(s)
- L A Chen
- Department of Medicine, Harvard Medical School, Massachusetts General Hospital 02114
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Liu YN, Chen LA, Zhang ZY, Li QS. Parrot breeder's lung: first case report in China. Chin Med J (Engl) 1989; 102:947-50. [PMID: 2517742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The authors report the first case of parrot breeder's lung in China and the study of its immunology, respiratory physiology, as well as pathology. The main characteristics of this disease are progressive dyspnea after contacting parrots, patchy or reticular shadows in the lower lung fields on chest X-ray, the presence of alveolitis, accompanied by pulmonary interstitial fibrosis as demonstrated in lung biopsy, restrictive or mixed ventilation disorders with reduction of diffusing capacity and lung compliance. The results of specific ring precipitation test and counter immunoelectrophoresis were helpful in diagnosis. The importance of early diagnosis and treatment is also discussed.
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Li JH, Zhao HZ, Chen LA. [Nd-YAG laser treatment of tracheobronchial lesions]. Zhonghua Nei Ke Za Zhi 1989; 28:418-20, 444-5. [PMID: 2591262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
From January 1987 to May 1988, 32 cases with tracheobronchial lesions were treated with Nd-YAG laser. Complete restoration of the airway was achieved in one case of leiomyoma, adenoma, carcinoid and mucous epithelioma each, 2 cases of polyp and 7 cases of granuloma. Significant restoration was seen in one case of granuloma, 2 cases of hematoma and papilloma, each, 3 cases of amyloidosis and partial restoration in one case of granuloma. The remaining 10 cases with squamous cell carcinoma and adenocarcinoma with severe airway obstruction were treated by Nd-YAG laser for palliative purpose only. Four of them revealed significant remission and 6 responded with partial remission. No severe complication was observed during or after the procedures. Nd-YAG laser treatment provides a new curative method avoiding resection of the lung in benign lesions and a palliative therapy for unresectable obstructive malignant tumors.
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Shu HD, Zhang LH, Gu JW, Chen LA. [Inhibitory action of ribostamycin sulfate on neuromuscular transmission]. Zhongguo Yao Li Xue Bao 1986; 7:26-30. [PMID: 3020871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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22
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Dale RE, Chen LA, Brand L. Rotational relaxation of the "microviscosity" probe diphenylhexatriene in paraffin oil and egg lecithin vesicles. J Biol Chem 1977; 252:7500-10. [PMID: 914824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
The rotational relaxation of the widely used "microviscosity" probe, 1,6-diphenyl-1,3,5-hexatriene, was examined by the technique of nanosecond time-resolved fluorescence depolarization. The decays of the emission anisotropy were determined at five temperatures in the range 3-31 degrees both in a reference paraffin oil and in sonicated egg lecithin vesicles. These decays were complex in both media. Marked qualitative as well as quantitative differences were observed in the rotational behavior of the probe in the complex bilayer medium as opposed to the homogeneous reference solvent. The results are discussed in relation to the structure of the hydrophobic bilayer membrane interior and the concept of its "microviscosity".
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Chen LA, Dale RE, Roth S, Brand L. Nanosecond time-dependent fluorescence depolarization of diphenylhexatriene in dimyristoyllecithin vesicles and the determination of "microviscosity". J Biol Chem 1977; 252:2163-9. [PMID: 849925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
The nanosecond time dependence of the fluorescence depolarization of 1,6-diphenyl-1,3,5-hexatriene in L-alpha-dimyristoyllecithin vesicles was determined at temperatures above and below the midpoint of the gel-liquid crystalline transition. In neither case could the decay of the total fluorescent emission or the decay of the emission anisotropy be described adequately in terms of single exponential decay laws. At the lower temperature, the emission anisotropy did not approach zero in the time window available for measurement, a finding which may indicate that the range over which rotation of the probe can freely occur is restricted. The results are discussed in relation to the concept of microviscosity of bilayer membranes.
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Chen LA, Dale RE, Roth S, Brand L. Nanosecond time-dependent fluorescence depolarization of diphenylhexatriene in dimyristoyllecithin vesicles and the determination of "microviscosity". J Biol Chem 1977. [DOI: 10.1016/s0021-9258(17)40534-5] [Citation(s) in RCA: 179] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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