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Sun WN, Kao CY. The Challenges in Using eHealth Decision Resources for Surrogate Decision-Making in the Intensive Care Unit. J Med Internet Res 2024; 26:e47017. [PMID: 38557504 PMCID: PMC11019413 DOI: 10.2196/47017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 11/23/2023] [Accepted: 01/29/2024] [Indexed: 04/04/2024] Open
Abstract
The mortality rate in intensive care units (ICUs) is notably high, with patients often relying on surrogates for critical medical decisions due to their compromised state. This paper provides a comprehensive overview of eHealth. The challenges of applying eHealth tools, including economic disparities and information inaccuracies are addressed. This study then introduces eHealth literacy and the assessment tools to evaluate users' capability and literacy levels in using eHealth resources. A clinical scenario involving surrogate decision-making is presented. This simulated case involves a patient with a hemorrhagic stroke who has lost consciousness and requires medical procedures such as tracheostomy. However, due to the medical surrogate's lack of familiarity with eHealth devices and limited literacy in using eHealth resources, difficulties arise in assisting the patient in making medical decisions. This scenario highlights challenges related to eHealth literacy and solution strategies are proposed. In conclusion, effective ICU decision-making with eHealth tools requires a careful balance between efficiency with inclusivity. Tailoring communication strategies and providing diverse materials are essential for effective eHealth decision resources in the ICU setting. Health professionals should adopt a patient-centered approach to enhance the decision-making experience, particularly for individuals with limited eHealth literacy.
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Affiliation(s)
- Wan-Na Sun
- Department of Nursing, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Chi-Yin Kao
- Department of Nursing, College of Medicine, National Cheng Kung University, Tainan, Taiwan
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Sun WN, Hsu HT, Ko NY, Huang YT. Decision-Making Processes in Surrogates of Cancer Patients in a Taiwan Intensive Care Unit. Int J Environ Res Public Health 2020; 17:ijerph17124443. [PMID: 32575778 PMCID: PMC7345805 DOI: 10.3390/ijerph17124443] [Citation(s) in RCA: 7] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 06/11/2020] [Accepted: 06/18/2020] [Indexed: 11/16/2022]
Abstract
Background: Few studies in Asian countries have explored the emotional entanglements and conflicts that surrogates often experience during the medical decision-making process. This study was to explore decision-making processes in surrogates of cancer patients in a Taiwan intensive care unit (ICU). This qualitative study surveyed a purposive sample of surrogates (n = 8; average age, 48 years) of cancer patients in the ICU of a medical center in Taiwan. A phenomenological methodology was used, and a purposive sample of surrogates of cancer patients were recruited and interviewed during the first three days of the ICU stay. Results: Based on the interview results, four themes were generalized through text progression: (1) Use love to resist: internal angst. This theme was related to the reflexive self -blame, the feelings of inner conflict, and the reluctance to make healthcare decisions, which surrogates experienced when they perceived suffering by the patient. (2) Allow an angel to spread love among us: memories and emotional entanglements. Memories of the patient caused the surrogate to experience emotional entanglements ranging from happiness to sadness and from cheerfulness to anger. (3) Dilemmas of love: anxiety about ICU visitor restrictions. The confined space and restricted visiting hours of the ICU limited the ability of surrogates to provide emotional support and to share their emotions with the patient. (4) Suffocating love: entanglement in decision-making. Emotional entanglements among family members with different opinions on medical care and their struggles to influence decision-making often prevented surrogates from thinking logically. Conclusions: Expression of emotions by ICU surrogates is often restrained and implicit, particularly in Asian populations. These results can help health professionals understand the psychological shock and inner conflict experienced by surrogates and provide a useful reference for improving their communications with surrogates.
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Affiliation(s)
- Wan-Na Sun
- Department of Nursing, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 704, Taiwan; (W.-N.S.); (N.-Y.K.)
| | - Hsin-Tien Hsu
- School of Nursing, College of Nursing, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Correspondence: ; Tel.: +886-7-312-1101 (ext. 2630)
| | - Nai-Ying Ko
- Department of Nursing, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 704, Taiwan; (W.-N.S.); (N.-Y.K.)
| | - Yu-Tung Huang
- Center for Big Data Analytic and Statistics, Chang Gung Memorial Hospital, Taoyuan 333, Taiwan;
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Sun WN, Su JW, Shen ZP, Hsu HT. [Effect of Oral Glutamine on Chemotherapy-Induced Peripheral Neuropathy in Cancer Patients: An Evidence-Based Appraisal]. Hu Li Za Zhi 2018; 65:61-69. [PMID: 29405021 DOI: 10.6224/jn.201802_65(1).09] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND Chemotherapy may induce peripheral neuropathy, which often results in the chemotherapy dose being reduced or the chemotherapy regimen being stopped. At present, there are no treatment guidelines for chemotherapy-induced peripheral neuropathy. Glutamine is one of the treatment strategies currently applied in practice. This strategy is expensive and lacks clear evidence as to its efficacy. PURPOSE To evaluate the effect of oral glutamine on CIPN in cancer patients. METHODS PICO (population- intervention- comparison- outcome) was used to focus the problem: P: cancer patient; I: glutamine, L-glutamine; C: usual care; O: alleviate, reduce, improve, and prevent. Databases searched included Airiti Library, Cochrane Library, CINAHL, and PubMed. Three randomized clinical trials and two quasi-experimental designs were evaluated using evidence-based appraisal. RESULTS Four studies used 30 g/day of glutamine either at the beginning of chemotherapy or at 24 hours after the beginning of chemotherapy. The shortest duration for taking glutamine was four days and longest duration was two months. The incidences of CIPN-induced pain were significantly different (risk ratio = 0.26; 95% CI [0.09, 0.70], Z = 2.65, p = .008) between the intervention and control groups. The incidences of CIPN grading, numbness, and muscle weakness were not significantly different between the intervention and control groups. From an economic point of view, the clinical efficacy of taking glutamine does not justify the additional daily cost to the patient of NT¤500 (about US¤17). CONCLUSIONS / IMPLICATIONS FOR PRACTICE Because of the small sample size, minimal effects of glutamine, and no significant decrease in risk, we do not suggest routinely using oral glutamine to prevent or reduce CIPN symptoms in cancer patients.
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Affiliation(s)
- Wan-Na Sun
- BSN, RN, Department of Nursing, National Cheng Kung University Hospital, Taiwan, ROC
| | - Jing-Wei Su
- BSN, RN, Nurse Practitioner, Department of Nursing, National Cheng Kung University Hospital, Taiwan, ROC
| | - Zih-Ping Shen
- BSN, RN, Graduate Student, School of Nursing, Kaohsiung Medical University, Taiwan, ROC
| | - Hsin-Tien Hsu
- PhD, RN, Associate Professor, School of Nursing, Kaohsiung Medical University, and Deputy Director, Department of Nursing, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Taiwan, ROC.
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Abstract
In this paper, a novel source model based on a magnetic vector potential for the assessment of induced electric field strength in a human body exposed to the low-frequency (LF) magnetic field of an electrical appliance is presented. The construction of the vector potential model requires only a single-component magnetic field to be measured close to the appliance under test, hence relieving considerable practical measurement effort-the radial basis functions (RBFs) are adopted for the interpolation of discrete measurements; the magnetic vector potential model can then be directly constructed by summing a set of simple algebraic functions of RBF parameters. The vector potentials are then incorporated into numerical calculations as the equivalent source for evaluations of the induced electric field in the human body model. The accuracy and effectiveness of the proposed model are demonstrated by comparing the induced electric field in a human model to that of the full-wave simulation. This study presents a simple and effective approach for modelling the LF magnetic source. The result of this study could simplify the compliance test procedure for assessing an electrical appliance regarding LF magnetic exposure.
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Affiliation(s)
- Y L Diao
- College of Electronic Engineering, South China Agricultural University, Guangzhou, People's Republic of China
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Mu FH, Hu FL, Wei H, Zhang YY, Yang GB, Lei XY, Yang YP, Sun WN, Cui MH. [Protective effect of compound bismuth and magnesium granules on aspirin-induced gastric mucosal injury in rats]. Zhonghua Yi Xue Za Zhi 2016; 96:464-7. [PMID: 26875925 DOI: 10.3760/cma.j.issn.0376-2491.2016.06.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To investigate the protective effect of compound bismuth and magnesium granules on aspirin-induced gastric mucosal injury in rats and its possible mechanism. METHODS Acute gastric mucosal injury model was developed with intraperitoneal injection of aspirin in Wistar rats. The rats were divided into normal control group, injury group, sucralfate protection group, compound bismuth and magnesium granules protection group and its herbal components protection group(each group 12 rats). In the protection groups, drugs as mentioned above were administered by gavage before treated with intraperitoneal injection of aspirin. To evaluate the extent of gastric mucosal injury and the protective effect of drugs, gastric mucosal lesion index, gastric mucosal blood flow, content of gastric mucosal hexosamine, prostaglandins (PG), nitric oxide(NO), tumor necrosis factor (TNF), and interleukin (IL) -1, 2, 8 were measured in each group, and histological changes were observed by gross as well as under microscope and electron microscope. RESULTS Contents of hexosamine, NO, and PG in all the protection groups were significantly higher than those in the injury group (all P<0.01), and content of NO in the compound bismuth and magnesium granules group was significantly higher than that in the sucralfate group ((11.29±0.51) vs(10.80±0.36)nmol/ml, P<0.05). The gastric mucosal lesion index, contents of TNF, and IL-1, 2, 8 were significantly lower in all the protection groups than in the injury group (all P<0.01), and contents of IL-2 and IL-8 in the compound bismuth and magnesium granules group were significantly lower than those in the sucralfate group ((328.17±6.56) vs(340.23±8.05)pg/ml, P<0.01; (170.82±7.31) vs(179.31±7.80)pg/ml, P<0.05). Tissue injury and inflammatory reaction in all the protection groups were obviously mitigated compared with the injury group. CONCLUSION Compound bismuth and magnesium granules and its herbal components may have significant protective effect on aspirin-induced gastric mucosal injury.
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Affiliation(s)
- F H Mu
- Department of Gastroenterology, Aerospace Center Hospital, Beijing 100049, China
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Fung M, Loubser PG, Undar A, Mueller M, Sun C, Sun WN, Vaughn WK, Fraser CD. Inhibition of complement, neutrophil, and platelet activation by an anti-factor D monoclonal antibody in simulated cardiopulmonary bypass circuits. J Thorac Cardiovasc Surg 2001; 122:113-22. [PMID: 11436043 DOI: 10.1067/mtc.2001.114777] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
OBJECTIVES Patients undergoing cardiopulmonary bypass frequently manifest generalized systemic inflammation and occasionally manifest serious multiorgan failure. Inflammatory responses of bypass are triggered by contact of blood with artificial surfaces of the bypass circuits, surgical trauma, and ischemia-reperfusion injury. We studied the effects of specific inhibition of the alternative complement cascade by using an anti-factor D monoclonal antibody (166-32) in extracorporeal circulation of human whole blood used as a simulated model of cardiopulmonary bypass. METHODS Five healthy blood donors were used in the study. Monoclonal antibody 166-32 was added to freshly collected, heparinized human blood recirculated in a pediatric cardiopulmonary bypass circuit at a final concentration of 18 microg/mL. An irrelevant monoclonal antibody was used as a negative control with the same donor blood in a parallel bypass circuit on the same day. Blood samples were collected at different time points during recirculation for measurement of activation of complement, neutrophils, and platelets by immunofluorocytometric methods and enzyme-linked immunosorbent assays. RESULTS Monoclonal antibody 166-32 inhibited the alternative complement activation and the production of Bb, C3a, sC5b-9, and C5a. Upregulation of CD11b on neutrophils and CD62P on platelets was also significantly inhibited by monoclonal antibody 166-32. This is consistent with the inhibition of the release of neutrophil-specific myeloperoxidase and elastase and platelet thrombospondin. The production of proinflammatory cytokine interleukin 8 was also suppressed by the antibody. CONCLUSIONS The alternative complement cascade is predominantly activated during extracorporeal circulation. Anti-factor D monoclonal antibody 166-32 is effective in inhibiting the activation of complement, neutrophils, and platelets. Inhibition of the alternative complement pathway by targeting factor D could be useful in reducing systemic inflammation in patients undergoing cardiopulmonary bypass.
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Affiliation(s)
- M Fung
- Tanox, Inc, Houston, TX, USA.
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Tanhehco EJ, Kilgore KS, Liff DA, Murphy KL, Fung MS, Sun WN, Sun C, Lucchesi BR. The anti-factor D antibody, MAb 166-32, inhibits the alternative pathway of the human complement system. Transplant Proc 1999; 31:2168-71. [PMID: 10456004 DOI: 10.1016/s0041-1345(99)00297-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- E J Tanhehco
- Department of Pharmacology, University of Michigan Medical School, Ann Arbor, USA
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Schwarze J, Cieslewicz G, Joetham A, Sun LK, Sun WN, Chang TW, Hamelmann E, Gelfand EW. Antigen-specific immunoglobulin-A prevents increased airway responsiveness and lung eosinophilia after airway challenge in sensitized mice. Am J Respir Crit Care Med 1998; 158:519-25. [PMID: 9700130 DOI: 10.1164/ajrccm.158.2.9801014] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Aeroallergens such as Amb a I from short ragweed are important in the development of allergic airway disease. We tested the ability of a human monoclonal immunoglobulin-A (IgA) antibody specific for Amb a I (A-IgA) to modulate airway responsiveness and lung eosinophilia after airway challenge with nebulized Amb a I or ragweed extract in mice sensitized to Amb a I or ragweed extract, respectively. A-IgA or nonspecific IgA (C-IgA) were given intranasally up to 8 h before each challenge. Allergen challenge resulted in increases in airway responsiveness, in numbers of lung eosinophils, and in Amb a I-specific IgE levels. These were prevented by pretreatment with A-IgA but not with C-IgA. Decreases in IFN-gamma and increases in IL-4 and IL-5 production following challenge with Amb a I were also reduced by A-IgA treatment. In contrast, increases in total IgE and total IgG and in numbers of lung neutrophils after challenge were not significantly affected by A-IgA, which additionally induced increased levels of Amb a I-specific IgG2a antibodies. In mice sensitized and challenged with ovalbumin (OVA), A-IgA did not affect airway responsiveness, lung eosinophilia, cytokine production, or immunoglobulin levels. These data indicate that allergen-specific IgA can prevent airway hyperresponsiveness and reduce eosinophil influx into the lungs following allergen challenge via the airways in sensitized mice, and these effects are allergen-specific. Neutralization of allergen may contribute to the effects of IgA, but the induction of allergen-specific IgG2a in A-IgA-treated mice suggests an immunomodulatory action for A-IgA.
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Affiliation(s)
- J Schwarze
- Division of Basic Sciences, Department of Pediatrics, National Jewish Medical and Research Center, Denver, Colorado, USA
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Sun LK, Fung MS, Sun WN, Sun CR, Chang WI, Chang TW. Human IgA monoclonal antibodies specific for a major ragweed pollen antigen. Biotechnology (N Y) 1995; 13:779-86. [PMID: 9634808 DOI: 10.1038/nbt0895-779] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Human hybridoma cell lines secreting IgG specific for the major allergen in the pollen of short ragweed, Amb a I, were established from patients who had been receiving antigen injections for immunotherapy. Recombinant Ig genes were then constructed by cloning the heavy and light chain variable region genes of the human hybridoma cell line and joining them to the human alpha or kappa constant region genes in mammalian expression vectors. Amb a I-specific IgA was expressed in two mouse myeloma cell lines, NS0 and Sp2/0. In both systems, transfected alpha and kappa chains were assembled into IgA monomers or into dimers covalently linked by the endogenous murine J chains. We propose that recombinant IgA monoclonal antibodies specific for airborne allergens may be applied to the mucosal surface of the nasal linings or of the lower airway of sensitized individuals to inhibit the entry of allergenic molecules across the mucosal epithelium and, therefore, to prevent the development of allergic responses.
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Affiliation(s)
- L K Sun
- Tanox Biosystems, Inc., Houston, Texas 77025, USA
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Safrit JT, Fung MS, Andrews CA, Braun DG, Sun WN, Chang TW, Koup RA. hu-PBL-SCID mice can be protected from HIV-1 infection by passive transfer of monoclonal antibody to the principal neutralizing determinant of envelope gp120. AIDS 1993; 7:15-21. [PMID: 7680205 DOI: 10.1097/00002030-199301000-00002] [Citation(s) in RCA: 73] [Impact Index Per Article: 2.4] [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: 01/26/2023]
Abstract
OBJECTIVE To determine whether passive transfer of a monoclonal antibody specific for the principal neutralizing determinant in the V3 region of HIV-1IIIB gp120 can protect mice with severe combined immunodeficiency (SCID) transplanted with normal human peripheral blood leukocytes (hu-PBL), designated hu-PBL-SCID mice, from subsequent challenge with the homologous viral strain. DESIGN AND METHODS hu-PBL-SCID mice were given intraperitoneal injections of an anti-HIV-1 neutralizing murine monoclonal antibody (BAT123), its mouse-human chimeric form (CGP 47 439), or a control murine antibody (PNTU), at a dose of 40 mg/kg. The mice were then challenged intraperitoneally with 10 mouse infectious doses of HIV-1IIIB. Three weeks later the mice were killed, and spleen cells and peritoneal lavage collected for determination of infection by coculture for viral isolation and by detection of HIV-1 DNA using polymerase chain reaction (PCR). RESULTS All three antibodies had similar serum half-lives of 9-12 days. No toxicity was observed in the animals. HIV-1 was recovered by coculture from five out of the six mice given PNTU, and by PCR from two out of the six mice given PNTU, but was not recovered by either technique from any of the 12 mice given BAT123 or CGP 47 439. CONCLUSION BAT123 and CGP 47 439, which are specific for the principal neutralizing determinant of HIV-1IIIB, protect hu-PBL-SCID mice from infection by this viral strain. Our findings support the use of the hu-PBL-SCID mouse as an in vivo model for studying protection against HIV-1 infection by passive immunization with anti-HIV-1 neutralizing antibodies.
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Affiliation(s)
- J T Safrit
- Aaron Diamond AIDS Research Center, New York, New York
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Fung MS, Sun CR, Gordon WL, Liou RS, Chang TW, Sun WN, Daar ES, Ho DD. Identification and characterization of a neutralization site within the second variable region of human immunodeficiency virus type 1 gp120. J Virol 1992; 66:848-56. [PMID: 1370558 PMCID: PMC240785 DOI: 10.1128/jvi.66.2.848-856.1992] [Citation(s) in RCA: 147] [Impact Index Per Article: 4.6] [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] [Indexed: 11/20/2022] Open
Abstract
Two monoclonal antibodies designated BAT085 and G3-136 were raised by immunizing BALB/c mice with gp120 purified from human immunodeficiency virus type 1 (HIV-1) IIIB-infected H9 cell extracts. Among three HIV-1 laboratory isolates (IIIB, MN, and RF), BAT085 neutralized only IIIB infection of CEM-SS cells, whereas G3-136 neutralized both IIIB and RF. These antibodies also neutralized a few primary HIV-1 isolates in the infection of activated human peripheral blood mononuclear cells. In indirect immunofluorescence assays, BAT085 bound to H9 cells infected with IIIB or MN, while G3-136 bound to H9 cells infected with IIIB or RF, but not MN. Using sequence-overlapping synthetic peptides of HIV-1 IIIB gp120, the binding site of BAT085 and G3-136 was mapped to a peptidic segment in the V2 region (amino acid residues 169 to 183). The binding of these antibodies to immobilized gp120 was not inhibited by the antibodies directed to the principal neutralization determinant in the V3 region or to the CD4-binding domain of gp120. In a competition enzyme-linked immunosorbent assay, soluble CD4 inhibited G3-136 but not BAT085 from binding to gp120. Deglycosylation of gp120 by endo-beta-N-acetylglucosaminidase H or reduction of gp120 by dithiothreitol diminished its reactivity with G3-136 but not with BAT085. These results indicate that the V2 region of gp120 contains multiple neutralization determinants recognized by antibodies in both a conformation-dependent and -independent manner.
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Affiliation(s)
- M S Fung
- Tanox Biosystems, Inc., Houston, Texas 77025
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Liou RS, Rosen EM, Fung MS, Sun WN, Sun C, Gordon W, Chang NT, Chang TW. A chimeric mouse-human antibody that retains specificity for HIV gp120 and mediates the lysis of HIV-infected cells. J Immunol 1989; 143:3967-75. [PMID: 2480382] [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: 01/01/2023]
Abstract
Murine mAb BAT123, which was made against the envelope glycoprotein gp120 of HTLV-IIIB strain of HIV type 1 (HIV-1), is capable of neutralizing HTLV-IIIB in vitro. It also inhibits the fusion between uninfected CD4+ cells and HIV-1-infected cells to form syncytia. As a step to explore the potential utility of the anti-HIV antibody in vivo, we have constructed a mouse-human chimeric antibody by rDNA techniques. The chimeric antibody, which bears the variable domains of mouse antibody BAT123 and constant domains Cr1 and C kappa of human Ig retains the Ag specificity of BAT123 as determined by its reactivity with HIV-1-infected H9 cells, gp120 in Western blot analysis, and the oligopeptide recognized by BAT123. The antiviral activities of the chimeric antibody in neutralizing HIV-1 infection as well as inhibiting the syncytia formation are also found identical to those of the parent murine antibody. Moreover, in the presence of human blood mononuclear cells, the chimeric antibody but not BAT123 (mouse IgG1) induces antibody-dependent cellular cytotoxicity. The findings point to the potential usefulness of the chimeric antibody in treating patients infected with HIV-1.
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Affiliation(s)
- R S Liou
- Tanox Biosystems, Inc., Houston, TX 77025
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Liou RS, Rosen EM, Fung MS, Sun WN, Sun C, Gordon W, Chang NT, Chang TW. A chimeric mouse-human antibody that retains specificity for HIV gp120 and mediates the lysis of HIV-infected cells. The Journal of Immunology 1989. [DOI: 10.4049/jimmunol.143.12.3967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Murine mAb BAT123, which was made against the envelope glycoprotein gp120 of HTLV-IIIB strain of HIV type 1 (HIV-1), is capable of neutralizing HTLV-IIIB in vitro. It also inhibits the fusion between uninfected CD4+ cells and HIV-1-infected cells to form syncytia. As a step to explore the potential utility of the anti-HIV antibody in vivo, we have constructed a mouse-human chimeric antibody by rDNA techniques. The chimeric antibody, which bears the variable domains of mouse antibody BAT123 and constant domains Cr1 and C kappa of human Ig retains the Ag specificity of BAT123 as determined by its reactivity with HIV-1-infected H9 cells, gp120 in Western blot analysis, and the oligopeptide recognized by BAT123. The antiviral activities of the chimeric antibody in neutralizing HIV-1 infection as well as inhibiting the syncytia formation are also found identical to those of the parent murine antibody. Moreover, in the presence of human blood mononuclear cells, the chimeric antibody but not BAT123 (mouse IgG1) induces antibody-dependent cellular cytotoxicity. The findings point to the potential usefulness of the chimeric antibody in treating patients infected with HIV-1.
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Affiliation(s)
- R S Liou
- Tanox Biosystems, Inc., Houston, TX 77025
| | - E M Rosen
- Tanox Biosystems, Inc., Houston, TX 77025
| | - M S Fung
- Tanox Biosystems, Inc., Houston, TX 77025
| | - W N Sun
- Tanox Biosystems, Inc., Houston, TX 77025
| | - C Sun
- Tanox Biosystems, Inc., Houston, TX 77025
| | - W Gordon
- Tanox Biosystems, Inc., Houston, TX 77025
| | - N T Chang
- Tanox Biosystems, Inc., Houston, TX 77025
| | - T W Chang
- Tanox Biosystems, Inc., Houston, TX 77025
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