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Yan X, Meng F, Wigati LP, Van TT, Phuong NTH, Koga A, Tanaka F, Tanaka F. Improvement of cross-linked films based on chitosan/diepoxy-poly (ethylene glycol) incorporating trans-cinnamaldehyde essential oil: Preparation, properties, and application in banana storage. Int J Biol Macromol 2024; 263:130299. [PMID: 38387633 DOI: 10.1016/j.ijbiomac.2024.130299] [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: 10/04/2023] [Revised: 02/07/2024] [Accepted: 02/17/2024] [Indexed: 02/24/2024]
Abstract
In this study, development of bioactive coatings containing 1 % (w/v) chitosan (CS), 0.6 % (w/v) diepoxy-polyethylene glycol (PEG), and trans-cinnamaldehyde (CIN) was achieved. The physicochemical and biological properties of the coatings were investigated. The tensile strength, light transmission, water vapor permeability (WVP), and antibacterial properties were enhanced by the incorporation of CIN. The CIN-containing films appeared compact and rough, as observed using scanning electron microscopy (SEM) and atomic force microscopy (AFM). In addition, the quality attributes of the bananas were evaluated at room temperature for 24 days, and the results showed that the CS/PEG/CIN coating delayed the respiration peak, weight loss, sugar content loss, and maintained firmness, color, total soluble solids (TSS), titratable acid (TA), and the appearance of the bananas. Principal component analysis (PCA) revealed that the bioactive coating significantly affected the respiration rate and weight loss of bananas.
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Affiliation(s)
- Xirui Yan
- Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, 744, Motooka, Nishi-Ku, Fukuoka-shi, Fukuoka 819-0395, Japan
| | - Fanze Meng
- Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, 744, Motooka, Nishi-Ku, Fukuoka-shi, Fukuoka 819-0395, Japan
| | - Laras Putri Wigati
- Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, 744, Motooka, Nishi-Ku, Fukuoka-shi, Fukuoka 819-0395, Japan
| | - Tran Thi Van
- Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, 744, Motooka, Nishi-Ku, Fukuoka-shi, Fukuoka 819-0395, Japan
| | - Nguyen Thi Hang Phuong
- Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, 744, Motooka, Nishi-Ku, Fukuoka-shi, Fukuoka 819-0395, Japan; Department of Food Technology, Faculty of Agriculture and Food Technology, Tien Giang University, My Tho City, 119 Ap Bac, Viet Nam
| | - Arisa Koga
- Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, 744, Motooka, Nishi-Ku, Fukuoka-shi, Fukuoka 819-0395, Japan
| | - Fumina Tanaka
- Faculty of Agriculture, Kyushu University, W5-874, 744, Motooka, Nishi-Ku, Fukuoka-shi, Fukuoka 819-0395, Japan.
| | - Fumihiko Tanaka
- Faculty of Agriculture, Kyushu University, W5-874, 744, Motooka, Nishi-Ku, Fukuoka-shi, Fukuoka 819-0395, Japan
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Phuong NTH, Tanaka F, Wardana AA, Van TT, Yan X, Nkede FN, Tanaka F. Persimmon preservation using edible coating of chitosan enriched with ginger oil and visualization of internal structure changes using X-ray computed tomography. Int J Biol Macromol 2024; 262:130014. [PMID: 38340933 DOI: 10.1016/j.ijbiomac.2024.130014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 01/19/2024] [Accepted: 02/05/2024] [Indexed: 02/12/2024]
Abstract
The incorporation of ginger oil (GO) influenced the physical, optical, and structural properties of the chitosan (CH) film including the decreases of moisture content (60.15 %), water solubility (35.37 %) and water vapor permeability (WVP) (32.79 %) and the increases of tensile strength (TS) (125 %), elongation at break (EAB) (2.74 %) and opacity (131.08 %). Antifungal capacity of the CH film was enhanced when GO was added to the film. The CH + GO film showed a less homogeneous surface that the presence of the oil droplets on the film surface. Moreover, the CH and CH + GO coatings reduced weight loss of persimmon by 14.87 %, and 21.13 %, respectively, compared to the control. Moisture content loss of the coated CH- and the coated CH + GO- persimmons was decreased by 1.94 % and 4.92 %, respectively, compared to that of the control persimmon. Furthermore, the CH and CH + GO coatings decreased in color changes, respiration rate, ethylene production, changes in pH and TSS, and remained firmness of persimmon during storage at 25 °C. In addition, X-ray CT images can be used to monitor internal changes and observe the tissue breakdown during storage period. The ΔGS value can be used as a predictor of persimmon internal qualities. Thus, the CH film containing GO can be applied as an active packaging material.
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Affiliation(s)
- Nguyen Thi Hang Phuong
- Department of Food Technology, Faculty of Agriculture and Food Technology, Tien Giang University, 119 Ap Bac, My Tho city, Viet Nam.
| | - Fumina Tanaka
- Division of Bio-production Environmental Sciences, Department of Agro-environmental Sciences, Faculty of Agriculture, Kyushu University, W5-873,744 Motooka, Nishi-ku Fukuoka shi 819-0395, Japan
| | - Ata Aditya Wardana
- Department of Food Technology, Faculty of Engineering, Bina Nusantara University, Jakarta 11480, Indonesia
| | - Tran Thi Van
- Division of Bio-production Environmental Sciences, Department of Agro-environmental Sciences, Faculty of Agriculture, Kyushu University, W5-873,744 Motooka, Nishi-ku Fukuoka shi 819-0395, Japan; Department of Preservation Technology Research on Agricultural Product, Vietnam Institution of Agricultural Engineering and Postharvest Technology, Hanoi 10000, Viet Nam
| | - Xirui Yan
- Division of Bio-production Environmental Sciences, Department of Agro-environmental Sciences, Faculty of Agriculture, Kyushu University, W5-873,744 Motooka, Nishi-ku Fukuoka shi 819-0395, Japan
| | - Francis Ngwane Nkede
- Division of Bio-production Environmental Sciences, Department of Agro-environmental Sciences, Faculty of Agriculture, Kyushu University, W5-873,744 Motooka, Nishi-ku Fukuoka shi 819-0395, Japan
| | - Fumihiko Tanaka
- Division of Bio-production Environmental Sciences, Department of Agro-environmental Sciences, Faculty of Agriculture, Kyushu University, W5-873,744 Motooka, Nishi-ku Fukuoka shi 819-0395, Japan
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Wardana AA, Wigati LP, Van TT, Tanaka F, Tanaka F. Antifungal features and properties of Pickering emulsion coating from alginate/ lemongrass oil/cellulose nanofibers. Int J Food Sci Technol 2022. [DOI: 10.1111/ijfs.16192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Ata Aditya Wardana
- Food Technology Department, Faculty of Engineering Bina Nusantara University Jakarta Indonesia 11480
| | - Laras Putri Wigati
- Graduate School of Bioresource and Bioenvironmental Sciences Kyushu University, 744, Motooka, Nishi‐ku, Fukuoka‐shi Fukuoka 819‐0395 Japan
- Department of Agricultural Product Technology, Indonesian Agricultural Engineering Polytechnic Tangerang 15338 Indonesia
| | - Tran Thi Van
- Graduate School of Bioresource and Bioenvironmental Sciences Kyushu University, 744, Motooka, Nishi‐ku, Fukuoka‐shi Fukuoka 819‐0395 Japan
| | - Fumina Tanaka
- Laboratory of Postharvest Science, Faculty of Agriculture Kyushu University W5‐873,744, Motooka, Nishi‐ku, Fukuoka‐shi Fukuoka 819‐0395 Japan
| | - Fumihiko Tanaka
- Laboratory of Postharvest Science, Faculty of Agriculture Kyushu University W5‐873,744, Motooka, Nishi‐ku, Fukuoka‐shi Fukuoka 819‐0395 Japan
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Ngan Ha N, Huong TTT, Vinh PT, Van TT. Surface Water Pollution Risk From Vietnam Water Quality Index (VN-WQI) in the Ca Mau City, Mekong Delta. NEPT 2021. [DOI: 10.46488/nept.2021.v20i04.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
This paper presents the study of integrating the remote sensing technology with in-situ ground observation for assessing the status of water quality in Ca Mau city through the Vietnam Water Quality Index (VN-WQI). The Sentinel-2 image and in-situ surface water samples were collected on 20 February 2020 for this study. The sample results were then specified by samples’ coordination. Besides, Sentinel-2 imaging was processed by radiometric and atmospheric correction, geometric registration, and extracted pixel spectral values from the sample locations. The multiple linear regressions of seven water quality parameters including BOD5, COD, NH4, PO4, TSS, pH, Coliform with surface water’s pixel spectral values from the satellite images were calculated and used to simulate water quality parameters on the satellite image. They were integrated into the VN-WQI to estimate, classify, and evaluate the general surface water quality of the Ca Mau city. The results show that there is a regressive correlation between measured data and image spectral values, and the simulation also well fits with the data with an acceptable error. The surface water quality of Ca Mau city is heavily polluted with almost all water quality parameters recognized at B1 to above B2 level according to the QCVN08-MT:2015/BTNMT. In terms of VN-WQI, the results also illustrate the low quality of surface water and heavy pollution only used for water transportation, not for domestic use. This approach can be a powerful method in spatially monitoring water quality and supporting environment management.
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Van TT, Kim TH, Butler-Wu SM. Evaluation of the Biofire FilmArray meningitis/encephalitis assay for the detection of Cryptococcus neoformans/gattii. Clin Microbiol Infect 2020; 26:1375-1379. [PMID: 31972318 DOI: 10.1016/j.cmi.2020.01.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 01/06/2020] [Accepted: 01/07/2020] [Indexed: 01/09/2023]
Abstract
OBJECTIVES Cryptococcal meningitis (CM) remains an important cause of morbidity and mortality among immunocompromised patients. Laboratory diagnostics for CM includes antigen detection, staining and culture. Data on the performance of the Biofire® FilmArray® meningitis/encephalitis (ME) panel for detecting Cryptococcus neoformans/gattii is limited, with several reports describing false negativity for this target. METHODS A retrospective analysis of 1384 physician-ordered ME panel tests ordered between January 2017 to October 2018 was performed. ME panel results were compared to cerebrospinal fluid (CSF) cryptococcal antigen (CrAg) and CSF culture testing and clinical significance of cryptococcal detection was determined. RESULTS There were 34 patients positive for cryptococcal detection by either ME panel, CSF CrAg or CSF culture in 2.7% of CSF specimens tested (38/1384). Of the 34 patients positive for cryptococcal detection, 85.3% were human immunodeficiency virus positive (29/34). The ME panel detected 32/38 (84.2%) cryptococcal-positive specimens, culture detected 28/38 (73.7%) and CSF CrAg was positive in 37/38 specimens (97.4%). The ME panel had a sensitivity and specificity of 96.4% (95% CI 81.7-99.9%) and 99.6% (95% CI 99.2-99.9%) compared with culture, and 83.8% (95% CI 68.0-93.8%) and 99.9% (95% CI 99.6-100.0%) compared to CSF CrAg testing, respectively. CrAg titres were lower among ME panel-negative, culture-negative specimens compared with ME panel-positive, culture-negative specimens (reciprocal median end-point titres of 128 ± 60 vs. 1920 ± 1730, p 0.04). All five CrAg-positive, ME panel- and culture-negative specimens were obtained from previously treated CM patients. DISCUSSION The ME panel had high correlation with CSF culture and a somewhat lower correlation with CSF CrAg testing. The potential utility of using negative ME panel test results to predict culture sterility among patients undergoing treatment for CM warrants further study.
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Affiliation(s)
- T T Van
- Department of Pathology, Harbor-UCLA Medical Center, Torrance, CA, USA; Department of Pathology and Laboratory Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - T H Kim
- Department of Pathology and Laboratory Medicine, Keck School of Medicine of USC, Los Angeles, CA, USA
| | - S M Butler-Wu
- Department of Pathology and Laboratory Medicine, Keck School of Medicine of USC, Los Angeles, CA, USA.
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Van TT, Bat LT, Nhan DD, Quang NH, Cam BD, Hung LV. Estimation of Radionuclide Concentrations and Average Annual Committed Effective Dose due to Ingestion for the Population in the Red River Delta, Vietnam. Environ Manage 2019; 63:444-454. [PMID: 29453646 PMCID: PMC6470118 DOI: 10.1007/s00267-018-1007-8] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Accepted: 01/25/2018] [Indexed: 05/31/2023]
Abstract
Radioactivity concentrations of nuclides of the 232Th and 238U radioactive chains and 40K, 90Sr, 137Cs, and 239+240Pu were surveyed for raw and cooked food of the population in the Red River delta region, Vietnam, using α-, γ-spectrometry, and liquid scintillation counting techniques. The concentration of 40K in the cooked food was the highest compared to those of other radionuclides ranging from (23 ± 5) (rice) to (347 ± 50) Bq kg-1 dw (tofu). The 210Po concentration in the cooked food ranged from its limit of detection (LOD) of 5 mBq kg-1 dw (rice) to (4.0 ± 1.6) Bq kg-1 dw (marine bivalves). The concentrations of other nuclides of the 232Th and 238U chains in the food were low, ranging from LOD of 0.02 Bq kg-1 dw to (1.1 ± 0.3) Bq kg-1 dw. The activity concentrations of 90Sr, 137Cs, and 239+240Pu in the food were minor compared to that of the natural radionuclides. The average annual committed effective dose to adults in the study region was estimated and it ranged from 0.24 to 0.42 mSv a-1 with an average of 0.32 mSv a-1, out of which rice, leafy vegetable, and tofu contributed up to 16.2%, 24.4%, and 21.3%, respectively. The committed effective doses to adults due to ingestion of regular diet in the Red River delta region, Vietnam are within the range determined in other countries worldwide. This finding suggests that Vietnamese food is safe for human consumption with respect to radiation exposure.
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Affiliation(s)
- Tran Thi Van
- Department of Science, Technology, Environment and International Cooperation, Directorate for Roads of Vietnam, D20 Lot, Ton That Thuyet Street, Cau Giay, Hanoi, Vietnam
| | - Luu Tam Bat
- Research Institute of the Environment and Social Problems, 6 Vu Huu, Thanh Xuan, Hanoi, Vietnam
| | - Dang Duc Nhan
- Viet Nam Atomic Energy Institute, 59 Ly Thuong Kiet, Hanoi, Vietnam.
| | - Nguyen Hao Quang
- Viet Nam Atomic Energy Institute, 59 Ly Thuong Kiet, Hanoi, Vietnam
| | - Bui Duy Cam
- University of Natural Sciences, Hanoi National University, 235 Nguyen Trai, Thanh Xuan, Hanoi, Vietnam
| | - Luu Viet Hung
- Department of Science and Technology, Ministry of Defense, 15 Hoang Dieu, Ba Dinh, Hanoi, Vietnam
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Veeramachaneni R, Gulick J, Halldorsson AO, Van TT, Zhang PL, Herrera GA. Benign myoepithelioma of the lung: a case report and review of the literature. Arch Pathol Lab Med 2001; 125:1494-6. [PMID: 11698012 DOI: 10.5858/2001-125-1494-bmotl] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This report describes a benign myoepithelioma of the lung that occurred in a 60-year-old woman. The patient had experienced hoarseness for 6 weeks, and a computed tomographic scan showed a nodule of approximately 2 cm in diameter at the peripheral portion of her right upper lung. Positron emission tomography showed no uptake of F-18 fluorodeoxyglucose in the nodule. Wedge biopsy of the lesion showed benign spindle cells arranged in a whorled pattern. The cells were positive for both cytokeratin and smooth muscle actin, which corresponded to the presence of tonofilaments and myofilaments that were identified ultrastructurally. The features of the present case of benign myoepithelioma that differ from features of previously reported benign and malignant cases of myoepithelioma in the lung are discussed in the report.
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Affiliation(s)
- R Veeramachaneni
- Department of Pathology, Louisiana State University Health Sciences Center, Shreveport, LA, USA
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Abstract
The effect of phosphate analogs (pyrophosphate, aluminofluoride and beryllofluoride complexes) on the reactivation of apobromoperoxidase by vanadate was studied. P2O7(4-) inhibited the reactivation in the millimolar range. Of the different aluminofluoride complexes, only AlF4- was inhibitory. In addition, BeF4(2-) also appeared to bind with high affinity to the apobromoperoxidase, thus inhibiting the reactivation very strongly. The inhibition observed supports a mechanism in which the fluorometallic complexes act as analogs of vanadate and bind accordingly to the apobromoperoxidase.
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Affiliation(s)
- M Tromp
- E.C. Slater Institute for Biochemical Research, University of Amsterdam, The Netherlands
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Finn PW, Van TT, Accolla RS, Glimcher LH. Loss of a DNA-protein complex correlates with extinguished major histocompatibility complex class II expression in a human B cell. J Exp Med 1990; 171:2159-64. [PMID: 2351936 PMCID: PMC2187944 DOI: 10.1084/jem.171.6.2159] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
An E beta DNA protein complex termed complex A, whose binding activity has recently been shown to correlate with both constitutive and regulated class II expression in murine cell lines, is also present in a human B cell, Raji. The DNA involved in complex A, which includes three previously defined transcriptional motifs, W, X, and Y, is a cis-acting transcription element in Raji cells. Both complex A binding activity and transcriptional activity of its target sequence are absent in an Ia- mutant subclone of Raji, RJ 2.2.5. This cell line, whose defect is complemented by a locus on mouse chromosome 16, reexpresses both class II and complex A upon transfection with mouse genomic DNA. We suggest that factors that form complex A or that regulate complex A formation account for the molecular lesion in this cell line.
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Affiliation(s)
- P W Finn
- Department of Cancer Biology, Harvard School of Public Health, Boston, Massachusetts 02115
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Abstract
The class II major histocompatibility complex (MHC, Ia) antigens are a family of membrane proteins whose expression is strictly regulated. They have a limited tissue distribution and their expression is regulated both developmentally and in response to external stimuli. Here we report the identification of a DNA binding protein complex (termed complex A) within the murine E beta MHC gene, which is restricted to cells that express Ia antigens. Complex A binding activity is developmentally regulated in cells of the B lineage in accordance with class II expression and is responsive to two different Ia-inducing lymphokines, interferon-gamma in macrophages and interleukin-4 in pre-B cells. The DNA target sequence in complex A includes three previously defined transcriptional motifs W, X and Y, and acts as a cis-acting transcription element. Complex A is present both in cells that are constitutive for class II MHC expression and in cells that have been induced for class II MHC expression. These results suggest that complex A may play a critical role in the regulation of class II MHC gene expression.
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Affiliation(s)
- P W Finn
- Department of Cancer Biology, Harvard School of Public Health, Boston, MA 02115
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Finn PW, Kara CJ, Douhan J, Van TT, Folsom V, Glimcher LH. Interferon gamma regulates binding of two nuclear protein complexes in a macrophage cell line. Proc Natl Acad Sci U S A 1990; 87:914-8. [PMID: 2105504 PMCID: PMC53379 DOI: 10.1073/pnas.87.3.914] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Interferon gamma (IFN-gamma) is a potent inducer of major histocompatibility complex (MHC) antigens during normal immune responses and in abnormal responses in autoimmune disease. In this report we identify two nuclear factors whose binding to the murine E beta class II MHC beta-chain gene is regulated by this cytokine. IFN-gamma stimulation of murine macrophages results in the appearance of increased binding of one protein complex, complex A, and decreased binding of a second, faster migrating protein complex, complex B. Although the contact residues for both of these proteins lie within the highly conserved Y-box transcriptional element, their binding specificity differs. The protein in complex B is a CCAAT-box-binding protein that may be similar or identical to NF-Y or YB1, previously identified class II Y-box-binding proteins. The DNA sequence requirements for the binding of the slower migrating complex, complex A, are not limited to CCAAT-box sequences but include sequences upstream of the Y box. These upstream sequences are required both for IFN-gamma-induced gene transcription and for IFN-gamma-induced modulation of binding activity. These data suggest a model in which upstream sequences contribute to formation of a lymphokine-regulated complex downstream. The IFN-gamma-induced binding protein described as complex A in this report differs from the IFN-gamma, -alpha, or -beta-induced nuclear factors previously identified.
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Affiliation(s)
- P W Finn
- Department of Cancer Biology, Harvard School of Public Health, Boston, MA 02115
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Laroche M, Arlet J, Ader JL, Van TT, Mole P, Mazières B. [Transitory phospho-bicarbonate diabetes and algodystrophy of the hip. 2 cases]. Rev Rhum Mal Osteoartic 1989; 56:157-8. [PMID: 2727595] [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] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- M Laroche
- Service de Rhumatologie, CHR de Rangueil, Toulouse
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Montastruc JL, Chamontin B, Rostin M, Rascol O, Valet P, Gaillard G, Tran MA, Van TT, Ader JL, Montastruc P. Experimental and clinical approaches to treatment of hypertension by dopamine receptor agonists. Clin Exp Hypertens A 1987; 9:1069-84. [PMID: 3304729 DOI: 10.3109/10641968709161466] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The action of several dopamine agonists on blood pressure was investigated. In dogs, apomorphine induced a decrease in blood pressure and an increase in heart rate. These effects were suppressed by intravenous haloperidol or phentolamine. Intravenous but not intracisternal domperidone suppressed the hypotensive responses elicited by intravenous or intracisternal apomorphine. Furthermore, the hypotensive effect of bromocriptine or apomorphine was abolished in adrenal demedullated dogs. Apomorphine and bromocriptine decreased adrenal catecholamine levels. In men, the acute hypotensive property of apomorphine (but not the long term effect of bromocriptine) was suppressed by pretreatment with domperidone. In hypertensive Parkinsonians, bromocriptine reduced blood pressure, induced an increase in inulin clearance, a decrease in plasma creatinine concentration and in renal vascular resistances. These results suggest that dopamine agonists (like apomorphine or bromocriptine) reduce blood pressure through both a decrease in sympathetic tone and an improvement in renal function. However, the mechanism of the acute and long term hypotensive effects could be different only involving peripheral mechanisms after acute administration and both peripheral and central structure under chronic treatment. In addition, preliminary results suggesting the potential interest of dopamine antagonists in the management of orthostatic hypotension are discussed.
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Ader JL, Girolami JP, Serres P, Cavalier MP, Van TT, Suc JC. [Direct renal actions of dopamine (proceedings)]. J Urol Nephrol (Paris) 1978; 84:890-1. [PMID: 748579] [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: 12/24/2022]
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Ader JL, Durand D, Van TT, Haas S, Suc JM. [Direct renal action of isoprenaline and propranolol]. J Urol Nephrol (Paris) 1977; 83:679-88. [PMID: 21971] [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: 12/12/2022]
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