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Tseng JR, Hsu CL, Hsieh HH, Ho KC, Chung YH, Wu CY. The Synergy of 177Lu-FAPI-046 with Tyrosine Kinase Inhibitor in a Sarcoma Patient-Derived Xenograft Mouse Model. Biomed J 2024:100744. [PMID: 38729609 DOI: 10.1016/j.bj.2024.100744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 04/09/2024] [Accepted: 05/02/2024] [Indexed: 05/12/2024] Open
Abstract
BACKGROUND Given the heterogeneity and high mortality associated with metastatic soft tissue sarcoma, this study aims to evaluate the therapeutic efficacy of combining 177Lu-FAPI-46 with Pazopanib against this malignancy. METHODS Patient-derived xenograft (PDX)-bearing mice were randomly divided into three groups: the control group, the 177Lu-FAPI-46 monotherapy group, and the 177Lu-FAPI-46 combined with Pazopanib therapy group. Therapeutic efficacy was regularly monitored. RESULTS The microPET imaging showed a 0.84-fold decrease in the T/M ratio of 68Ga-FAPI-46 on day 7/8 post combination therapy, while the control group exhibited a 1.23-fold increase. Combination therapy significantly inhibited tumor proliferation, as evidenced by reduced Ki-67 and increased caspase 3 expressions. Notably, there was no significant body weight loss observed in any group. CONCLUSION This study successfully demonstrated the reduction in FAP expression and suppression of tumor volume in sarcoma PDX following the combination therapy of 177Lu-FAPI-46 with Pazopanib.
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Affiliation(s)
- Jing-Ren Tseng
- Department of Nuclear Medicine, New Taipei Municipal TuCheng Hospital (Built and Operated by Chang Gung Medical Foundation), New Taipei City 236, Taiwan; School of Medicine, Chang Gung University, Taoyuan 333, Taiwan
| | - Cheng-Lung Hsu
- Department of Hematology-Oncology, Chang Gung Memorial Hospital, Medical College of Chang Gung University, Taoyuan, Taiwan
| | - Hsin-Hua Hsieh
- Department of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Taipei Branch, Taipei
| | - Kung-Chu Ho
- Department of Nuclear Medicine, Linkou Chang Gung Memorial Hospital, Taoyuan 333, Taiwan
| | - Yi-Hsiu Chung
- Department of Medical Research and Development, Chang Gung Memorial Hospital at Linkou, Taoyuan 333423, Taiwan.
| | - Chun-Yi Wu
- Department of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Taipei Branch, Taipei.
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Hsieh HH, Chen CL, Chan HW, Chi KH, Wu CY. Enhanced antitumour response of gold nanostar-mediated photothermal therapy in combination with immunotherapy in a mouse model of colon carcinoma. Br J Cancer 2024; 130:406-416. [PMID: 38135715 PMCID: PMC10844602 DOI: 10.1038/s41416-023-02537-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 11/26/2023] [Accepted: 12/01/2023] [Indexed: 12/24/2023] Open
Abstract
OBJECTIVES This study investigated the potential of combining PTT with dendritic cell (DC)-based immunotherapy and anti-PD-L1 immune checkpoint blockade (ICB) therapy against colorectal cancer and elucidated the underlying mechanisms. METHODS The CT26 tumour-bearing mice were divided into seven treatment groups: control, atezolizumab (A), dendritic cells (DC), pAuNSs-mediated PTT (PTT), PTT combined with atezolizumab (PTT + A), PTT combined with dendritic cells (PTT + DC), and PTT combined with dendritic cells and atezolizumab (PTT + DC + A). Therapeutic efficacy was monitored. RESULTS PTT upregulated most immune cell membrane receptor genes, including PD-L1, and downregulated genes associated with antigen presentation and T cell activation. Although the PTT + A and PTT + DC treatments showed partial tumour growth retardation, the combination of PTT with DCs and atezolizumab (PTT + DC + A) exhibited the most significant antitumour effect, with a complete remission rate of 50% and prolonged survival. On day 14, tumour samples from non-responsive mice revealed insufficient recruitment of T cells as the reason for uncured tumours. Notably, mice cured with PTT + DC and PTT + DC + A treatments showed no detectable lung nodules. CONCLUSION This study demonstrated that the combination of PTT with DC-based immunotherapy and atezolizumab effectively overcomes the non-sensitive nature of CT26 tumours. These findings highlight the potential of this combination approach for colorectal cancer treatment.
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Affiliation(s)
- Hsin-Hua Hsieh
- Department of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Taipei, 112, Taiwan
| | - Chuan-Lin Chen
- Department of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Taipei, 112, Taiwan
| | - Hui-Wen Chan
- Department of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Taipei, 112, Taiwan
| | - Kwan-Hwa Chi
- Department of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Taipei, 112, Taiwan
- Department of Radiation Therapy and Oncology, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, 111, Taiwan
| | - Chun-Yi Wu
- Department of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Taipei, 112, Taiwan.
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Hsieh HH, Chu PA, Lin YH, Kao YCJ, Chung YH, Hsu ST, Mo JM, Wu CY, Peng SL. Imaging diabetic cardiomyopathy in a type 1 diabetic rat model using 18F-FEPPA PET. Nucl Med Biol 2024; 128-129:108878. [PMID: 38324923 DOI: 10.1016/j.nucmedbio.2024.108878] [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: 11/01/2023] [Revised: 01/08/2024] [Accepted: 01/22/2024] [Indexed: 02/09/2024]
Abstract
OBJECTIVE Diabetic patients often experience chronic inflammation and fibrosis in their cardiac tissues, highlighting the pressing need for the development of sensitive diagnostic methods for longitudinal assessment of diabetic cardiomyopathy. This study aims to evaluate the significance of an inflammatory marker known as translocator protein (TSPO) in a positron emission tomography (PET) protocol for longitudinally monitoring cardiac dysfunction in a diabetic animal model. Additionally, we compared the commonly used radiotracer, 18F-fluoro-2-deoxy-d-glucose (18F-FDG). METHODS Fourteen 7-week-old female Sprague-Dawley rats were used in this study. Longitudinal PET experiments were conducted using 18F-N-2-(2-fluoroethoxy)benzyl)-N-(4-phenoxypyridin-3-yl)acetamide (18F-FEPPA) (n = 3), the TSPO radiotracer, and 18F-FDG (n = 3), both before and after the onset of diabetes. Histological and immunohistochemical staining assays were also conducted in both the control (n = 4) and diabetes (n = 4) groups. RESULTS Results indicated a significant increase in cardiac tissue uptake of 18F-FEPPA after the onset of diabetes (P < 0.05), aligning with elevated TSPO levels observed in diabetic animals according to histological data. Conversely, the uptake of 18F-FDG in cardiac tissue significantly decreased after the onset of diabetes (P < 0.05). CONCLUSION These findings suggest that 18F-FEPPA can function as a sensitive probe for detecting chronic inflammation and fibrosis in the cardiac tissues of diabetic animals.
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Affiliation(s)
- Hsin-Hua Hsieh
- Department of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Taipei Branch, Taipei, Taiwan
| | - Pei-An Chu
- Department of Biomedical Engineering, National Taiwan University, Taipei, Taiwan
| | - Yu-Hsin Lin
- Department of Pharmacy, National Yang Ming Chiao Tung University, Taipei Branch, Taipei, Taiwan; Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan
| | - Yu-Chieh Jill Kao
- Department of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Taipei Branch, Taipei, Taiwan
| | - Yi-Hsiu Chung
- Center for Advanced Molecular Imaging and Translation, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Shih-Ting Hsu
- Center for Advanced Molecular Imaging and Translation, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Jia-Min Mo
- Department of Biomedical Imaging and Radiological Science, China Medical University, Taichung, Taiwan
| | - Chun-Yi Wu
- Department of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Taipei Branch, Taipei, Taiwan.
| | - Shin-Lei Peng
- Department of Biomedical Imaging and Radiological Science, China Medical University, Taichung, Taiwan; Neuroscience and Brain Disease Center, China Medical University, Taichung, Taiwan.
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Wu CY, Lin YH, Hsieh HH, Chung YH, Hsu ST, Peng SL. The effect of estrogen therapy on cerebral metabolism in diabetic female rats. Comput Struct Biotechnol J 2023; 21:4769-4776. [PMID: 37841332 PMCID: PMC10570627 DOI: 10.1016/j.csbj.2023.09.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 09/20/2023] [Accepted: 09/24/2023] [Indexed: 10/17/2023] Open
Abstract
The impact of estrogen on brain function, especially in individuals with diabetes, remains uncertain. This study aims to compare cerebral glucose metabolism levels in intact rats, ovariectomized (OVX) rats, and 17β-estradiol (E2)-treated OVX diabetic female rats. Sixteen rats were administered a single intraperitoneal injection of 70 mg/kg streptozotocin (STZ) to induce diabetes (intact, n = 6; OVX, n = 6; OVX+E2-treated, n = 4). Additionally, 18 rats received an equivalent solvent dose via intraperitoneal injection (intact, n = 6; OVX, n = 6; OVX+E2-treated, n = 6). After 4 weeks of STZ or solvent administration, positron emission tomography scans with 18F-fluorodeoxyglucose (18F-FDG) injection were employed to assess cerebral glucose metabolism. The diabetic rats exhibited substantial reductions in 18F-FDG uptake across all brain regions (all P < 0.01), in contrast to the control rats. Moreover, intact and OVX + E2-treated diabetic female rats displayed more pronounced decreases in cerebral glucose metabolism in the amygdala and hippocampus compared to OVX diabetic female rats (P < 0.05). These findings suggest that diabetes creates an environment wherein estrogen exacerbates neuropathology and intensifies neuronal activity.
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Affiliation(s)
- Chun-Yi Wu
- Department of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Taipei Branch, Taipei, Taiwan
| | - Yu-Hsin Lin
- Department of Pharmacy, National Yang Ming Chiao Tung University, Taipei Branch, Taipei, Taiwan
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan
| | - Hsin-Hua Hsieh
- Department of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Taipei Branch, Taipei, Taiwan
| | - Yi-Hsiu Chung
- Center for Advanced Molecular Imaging and Translation, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Shih-Ting Hsu
- Center for Advanced Molecular Imaging and Translation, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Shin-Lei Peng
- Department of Biomedical Imaging and Radiological Science, China Medical University, Taichung, Taiwan
- Neuroscience and Brain Disease Center, China Medical University, Taiwan
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Wu CY, Hsieh HH, Huang SM, Chiu SC, Peng SL. Brain alterations in ovariohysterectomized rats revealed by diffusion tensor imaging. Neuroreport 2023; 34:649-654. [PMID: 37506310 DOI: 10.1097/wnr.0000000000001937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/30/2023]
Abstract
OBJECTIVES Women undergoing hysterectomy with oophorectomy have an increased risk of Alzheimer's disease and Parkinson's disease. However, postoperative neuroimaging data on pathogenic processes in the brain are limited. The aim of this study was to investigate the potential effect of ovariohysterectomy on brain integrity in rat model using diffusion tensor imaging (DTI) technique for the first time. METHODS We enrolled 13 rats each in the control and ovariohysterectomy groups. Rats in the ovariohysterectomy group underwent the ovariohysterectomy at 7 weeks of age, and all rats underwent DTI scans at 9 weeks of age. The DTI-derived parameters, such as fractional anisotropy and mean diffusivity, were compared between the control and ovariohysterectomy groups. RESULTS Compared to the control group, the ovariohysterectomy group showed significantly lower fractional anisotropy in various brain regions, including the corpus callosum, bilateral striatum, and bilateral cortex (all P < 0.05), suggesting neuronal injury in ovariohysterectomized rats. Mean diffusivity did not differ significantly between groups (all P > 0.05). CONCLUSION Rats undergoing ovariohysterectomy had lower fractional anisotropy compared to control in widespread brain regions, suggesting neuronal injury and demyelination. Therefore, neuroimaging should be performed to monitor brain alterations in women after hysterectomy with bilateral oophorectomy in clinical settings.
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Affiliation(s)
- Chun-Yi Wu
- Department of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Taipei Branch, Taipei
| | - Hsin-Hua Hsieh
- Department of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Taipei Branch, Taipei
| | - Sheng-Min Huang
- Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, Miaoli
| | - Shao-Chieh Chiu
- Center for Advanced Molecular Imaging and Translation, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Shin-Lei Peng
- Department of Biomedical Imaging and Radiological Science
- Neuroscience and Brain Disease Center, China Medical University, Taichung, Taiwan
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Chang YW, Hsiao HW, Chen JP, Tzeng SF, Tsai CH, Wu CY, Hsieh HH, Carmona SJ, Andreatta M, Di Conza G, Su MT, Koni PA, Ho PC, Chen HK, Yang MH. A CSF-1R-blocking antibody/IL-10 fusion protein increases anti-tumor immunity by effectuating tumor-resident CD8 + T cells. Cell Rep Med 2023; 4:101154. [PMID: 37586318 PMCID: PMC10439276 DOI: 10.1016/j.xcrm.2023.101154] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 06/04/2023] [Accepted: 07/18/2023] [Indexed: 08/18/2023]
Abstract
Strategies to increase intratumoral concentrations of an anticancer agent are desirable to optimize its therapeutic potential when said agent is efficacious primarily within a tumor but also have significant systemic side effects. Here, we generate a bifunctional protein by fusing interleukin-10 (IL-10) to a colony-stimulating factor-1 receptor (CSF-1R)-blocking antibody. The fusion protein demonstrates significant antitumor activity in multiple cancer models, especially head and neck cancer. Moreover, this bifunctional protein not only leads to the anticipated reduction in tumor-associated macrophages but also triggers proliferation, activation, and metabolic reprogramming of CD8+ T cells. Furthermore, it extends the clonotype diversity of tumor-infiltrated T cells and shifts the tumor microenvironment (TME) to an immune-active state. This study suggests an efficient strategy for designing immunotherapeutic agents by fusing a potent immunostimulatory molecule to an antibody targeting TME-enriched factors.
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Affiliation(s)
- Yao-Wen Chang
- Cancer and Immunology Research Center, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan
| | | | - Ju-Pei Chen
- Cancer and Immunology Research Center, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan
| | - Sheue-Fen Tzeng
- Graduate Institute of Life Sciences, National Defense Medical Center, Taipei 11221, Taiwan
| | - Chin-Hsien Tsai
- Graduate Institute of Life Sciences, National Defense Medical Center, Taipei 11221, Taiwan
| | - Chun-Yi Wu
- Department of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan
| | - Hsin-Hua Hsieh
- Department of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan
| | - Santiago J Carmona
- Department of Oncology, University of Lausanne, Lausanne, Switzerland; Ludwig Institute for Cancer Research at University of Lausanne, Lausanne, Switzerland
| | - Massimo Andreatta
- Department of Oncology, University of Lausanne, Lausanne, Switzerland; Ludwig Institute for Cancer Research at University of Lausanne, Lausanne, Switzerland
| | - Giusy Di Conza
- Department of Oncology, University of Lausanne, Lausanne, Switzerland; Ludwig Institute for Cancer Research at University of Lausanne, Lausanne, Switzerland
| | - Mei-Tzu Su
- Department of Biotechnology and Laboratory Science in Medicine, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan
| | | | - Ping-Chih Ho
- Department of Oncology, University of Lausanne, Lausanne, Switzerland; Ludwig Institute for Cancer Research at University of Lausanne, Lausanne, Switzerland
| | - Hung-Kai Chen
- Elixiron Immunotherapeutics (Hong Kong) Ltd., Hong Kong.
| | - Muh-Hwa Yang
- Cancer and Immunology Research Center, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan; Department of Biotechnology and Laboratory Science in Medicine, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan; Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan; Department of Oncology, Taipei Veterans General Hospital, Taipei 11217, Taiwan; Department of Teaching and Research, Taipei City Hospital, Taipei, Taiwan.
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Wu CY, Huang SM, Lin YH, Hsieh HH, Chu LWL, Yang HC, Chiu SC, Peng SL. Reproducibility of diffusion tensor imaging-derived parameters: implications for the streptozotocin-induced type 1 diabetic rats. MAGMA 2023; 36:631-639. [PMID: 36378408 DOI: 10.1007/s10334-022-01048-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Revised: 10/13/2022] [Accepted: 11/08/2022] [Indexed: 06/16/2023]
Abstract
OBJECTIVE Diffusion tensor imaging (DTI) is a useful approach for studying neuronal integrity in animals. However, the test-retest reproducibility of DTI techniques in animals has not been discussed. Therefore, the first part of this work was to systematically elucidate the reliability of DTI-derived parameters in an animal study. Subsequently, we applied the DTI approach to an animal model of diabetes in a longitudinal manner. MATERIALS AND METHODS In Study 1, nine rats underwent two DTI sessions using the same scanner and protocols, with a gap of 4 weeks. The reliability of the DTI-derived parameters was evaluated in terms of sessions and raters. In Study 2, nine rats received a single intraperitoneal injection of 70 mg/kg streptozotocin (STZ) to develop diabetes. Longitudinal DTI scans were used to assess brain alterations before and 4 weeks after STZ administration. RESULTS In the test-retest evaluation, the inter-scan coefficient of variation (CoV) ranged from 3.04 to 3.73% and 2.12-2.59% for fractional anisotropy (FA) and mean diffusivity (MD), respectively, in different brain regions, suggesting excellent reproducibility. Moreover, rater-dependence had minimal effects on FA and MD quantification, with all inter-rater CoV values less than 4%. Following the onset of diabetes, FA in striatum and cortex were noted to be significantly lower relative to the period where they had not developed diabetes (both P < 0.05). However, when compared to the control group, a significant change in FA caused by diabetes was detected only in the striatum (P < 0.05), but not in the cortex. CONCLUSION These results demonstrate good inter-rater and inter-scan reliability of DTI in animal studies, and the longitudinal setting has a beneficial effect on detecting small changes in the brain due to diseases.
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Affiliation(s)
- Chun-Yi Wu
- Department of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Taipei Branch, Taipei, Taiwan
| | - Sheng-Min Huang
- Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, Miaoli, Taiwan
| | - Yu-Hsin Lin
- Department of Pharmacy, Taipei Branch, National Yang Ming Chiao Tung University, Taipei, Taiwan
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan
| | - Hsin-Hua Hsieh
- Department of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Taipei Branch, Taipei, Taiwan
| | - Lok Wang Lauren Chu
- Department of Biomedical Imaging and Radiological Science, China Medical University, No. 91 Hsueh-Shih Road, Taichung, 40402, Taiwan
| | - Hui-Chieh Yang
- Department of Biomedical Imaging and Radiological Science, China Medical University, No. 91 Hsueh-Shih Road, Taichung, 40402, Taiwan
| | - Shao-Chieh Chiu
- Center for Advanced Molecular Imaging and Translation, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Shin-Lei Peng
- Department of Biomedical Imaging and Radiological Science, China Medical University, No. 91 Hsueh-Shih Road, Taichung, 40402, Taiwan.
- Neuroscience and Brain Disease Center, China Medical University, No. 91 Hsueh-Shih Road, Taichung, 40402, Taiwan.
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Hsieh HH, Kuo WY, Lin JJ, Chen HS, Hsu HJ, Wu CY. Tumor-Targeting Ability of Novel Anti-Prostate-Specific Membrane Antigen Antibodies. ACS Omega 2022; 7:31529-31537. [PMID: 36092556 PMCID: PMC9454275 DOI: 10.1021/acsomega.2c04230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 08/12/2022] [Indexed: 06/15/2023]
Abstract
Patients with prostate-specific membrane antigen (PSMA)-positive tumors can benefit from PSMA-targeted therapy; thus, we have constructed a phage-displayed synthetic antibody library for the production of novel PSMA antibodies with superior PSMA-targeting ability, favoring clinical management. The binding affinities of anti-PSMA antibodies were verified by an enzyme-linked immunosorbent assay (ELISA). Several in vitro and in vivo experiments, including cellular uptake, internalization, and cytotoxicity studies, micro single photon emission computed tomography (microSPECT)/CT, and biodistribution studies, were performed to select the most promising antibody among six different antibodies. The results showed the target affinities of our antibodies in the ELISA assays (7A, 8C, 8E, and 11A) were comparable to the existing antibodies (J591). The half-maximal effective concentrations of 7A, 8C, 8E, 11A, and J591 were 2.95, 6.64, 5.50, 2.08, and 4.79, respectively. The radiochemical yield of 111In-labeled antibodies ranged from 30% to 50% with high radiochemical purity (>90%). In the cellular uptake studies, the accumulated radioactivity of 111In-J591, 111In-7A, and 111In-11A increased over time. The internalized percentage of 111In-11A was the highest (32.14% ± 2.06%) at 48 h after incubation, whereas that of 111In-J591 peaked at 22.43% ± 4.38% at 24 h and dropped to 13.52% ± 3.03% at 48 h postincubation. Twenty-four hours after injection, radioactivity accumulation appeared in the LNCaP xenografts of the mice injected with 111In-11A, 111In-8E, 111In-7A, and 111In-J591 but not in the xenografts of the 111In-8C-injected group. Marked liver uptake was noticed in all groups except the 111In-11A-injected group. Moreover, the killing effect of 177Lu-11A was superior to that of 177Lu-J591 at low concentrations. In conclusion, we successfully demonstrated that 11A IgG owned the most optimal biological characteristics among several new anti-PSMA antibodies and it can be an excellent PSMA-targeting component for the clinical use.
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Affiliation(s)
- Hsin-Hua Hsieh
- Department
of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Taipei Branch, Taipei 112, Taiwan
| | - Wei-Ying Kuo
- Genomics
Research Center, Academia Sinica, Taipei 115, Taiwan
| | - Jia-Jia Lin
- Department
of Nuclear Medicine, New Taipei Municipal
TuCheng Hospital (Built and Operated by Chang Gung Medical Foundation), New Taipei City 236, Taiwan
| | - Hong-Sen Chen
- Genomics
Research Center, Academia Sinica, Taipei 115, Taiwan
| | - Hung-Ju Hsu
- Genomics
Research Center, Academia Sinica, Taipei 115, Taiwan
| | - Chun-Yi Wu
- Department
of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Taipei Branch, Taipei 112, Taiwan
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Huang SM, Wu CY, Lin YH, Hsieh HH, Yang HC, Chiu SC, Peng SL. Differences in brain activity between normal and diabetic rats under isoflurane anesthesia: a resting-state functional MRI study. BMC Med Imaging 2022; 22:136. [PMID: 35927630 PMCID: PMC9354416 DOI: 10.1186/s12880-022-00867-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Accepted: 07/27/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Altered neural activity based on the fractional amplitude of low-frequency fluctuations (fALFF) has been reported in patients with diabetes. However, whether fALFF can differentiate healthy controls from diabetic animals under anesthesia remains unclear. The study aimed to elucidate the changes in fALFF in a rat model of diabetes under isoflurane anesthesia. METHODS The first group of rats (n = 5) received a single intraperitoneal injection of 70 mg/kg streptozotocin (STZ) to cause the development of diabetes. The second group of rats (n = 7) received a single intraperitoneal injection of the same volume of solvent. Resting-state functional magnetic resonance imaging was used to assess brain activity at 4 weeks after STZ or solvent administration. RESULTS Compared to the healthy control animals, rats with diabetes showed significantly decreased fALFF in various brain regions, including the cingulate cortex, somatosensory cortex, insula, and striatum (all P < 0.05). The decreased fALFF suggests the aberrant neural activities in the diabetic rats. No regions were detected in which the control group had a lower fALFF than that in the diabetes group. CONCLUSIONS The results of this study demonstrated that the fALFF could be used to differentiate healthy controls from diabetic animals, providing meaningful information regarding the neurological pathophysiology of diabetes in animal models.
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Affiliation(s)
- Sheng-Min Huang
- Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, Miaoli, Taiwan
| | - Chun-Yi Wu
- Department of Biomedical Imaging and Radiological Sciences, Taipei Branch, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Yu-Hsin Lin
- Department of Pharmacy, Taipei Branch, National Yang Ming Chiao Tung University, Taipei, Taiwan.,Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan
| | - Hsin-Hua Hsieh
- Department of Biomedical Imaging and Radiological Sciences, Taipei Branch, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Hui-Chieh Yang
- Department of Biomedical Imaging and Radiological Science, China Medical University, Taichung, Taiwan
| | - Shao-Chieh Chiu
- Center for Advanced Molecular Imaging and Translation, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Shin-Lei Peng
- Department of Biomedical Imaging and Radiological Science, China Medical University, Taichung, Taiwan. .,Neuroscience and Brain Disease Center, China Medical University, Taichung, Taiwan.
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Wu CY, Lin YH, Hsieh HH, Lin JJ, Peng SL. Sex Differences in the Effect of Diabetes on Cerebral Glucose Metabolism. Biomedicines 2021; 9:1661. [PMID: 34829890 PMCID: PMC8615590 DOI: 10.3390/biomedicines9111661] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 11/05/2021] [Accepted: 11/08/2021] [Indexed: 12/25/2022] Open
Abstract
The neuroimaging literature indicates that brain structure and function both deteriorate with diabetes, but information on sexual dimorphism in diabetes-related brain alterations is limited. This study aimed to ascertain whether brain metabolism is influenced by sex in an animal model of diabetes. Eleven rats (male, n = 5; female, n = 6) received a single intraperitoneal injection of 70 mg/kg streptozotocin (STZ) to develop diabetes. Another 11 rats (male, n = 5; female, n = 6) received the same amount of solvent through a single intraperitoneal injection. Longitudinal positron emission tomography scans were used to assess cerebral glucose metabolism before and 4 weeks after STZ or solvent administration. Before STZ or solvent injections, there was no evidence of sexual dimorphism in cerebral metabolism (p > 0.05). Compared with healthy control animals, rats with diabetes had significantly decreased brain metabolism in all brain regions (all p < 0.05). In addition, female diabetic rats exhibited further reduction in cerebral metabolism, relative to male diabetic rats (p < 0.05). The results of this study may provide some biological evidence, supporting the existence of a sexual dimorphism in diabetes-related complications.
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Affiliation(s)
- Chun-Yi Wu
- Department of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Taipei Branch, Taipei 112304, Taiwan; (C.-Y.W.); (H.-H.H.)
| | - Yu-Hsin Lin
- Department of Pharmacy, National Yang Ming Chiao Tung University, Taipei Branch, Taipei 112304, Taiwan;
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung 404333, Taiwan
| | - Hsin-Hua Hsieh
- Department of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Taipei Branch, Taipei 112304, Taiwan; (C.-Y.W.); (H.-H.H.)
| | - Jia-Jia Lin
- Center for Advanced Molecular Imaging and Translation, Chang Gung Memorial Hospital, Taoyuan 404333, Taiwan;
| | - Shin-Lei Peng
- Department of Biomedical Imaging and Radiological Science, China Medical University, Taichung 404332, Taiwan
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11
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Ohta H, Yoshimura K, Hu Z, Chin YY, Lin HJ, Hsieh HH, Chen CT, Tjeng LH. Determination of the Co valence in bilayer hydrated superconducting NaxCoO2 · yH2O by soft x-ray absorption spectroscopy. Phys Rev Lett 2011; 107:066404. [PMID: 21902348 DOI: 10.1103/physrevlett.107.066404] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2010] [Indexed: 05/31/2023]
Abstract
We addressed the so-far unresolved issue concerning the Co valence in the superconducting bilayer hydrated Na(x)CoO(2) · yH(2)O (x∼0.35, y∼1.3) using soft x-ray absorption spectroscopy at the Co-L(2,3) and O-K edges. We find that the valence state of the Co lies in a narrow range from +3.3 to +3.4 for all studied Na(x)CoO(2) · yH(2)O samples and their deuterated analogue with T(c)'s ranging from 3.8 to 4.7 K. These valence values are far from the often claimed +3.7, the number based on the Na content only. We propose to modify the phase diagram accordingly, where the basic electronic structure of the superconducting phase is very close to that of the Na(0.7)CoO(2) system, suggesting that the presence of in-plane spin fluctuations could play an important role for the superconductivity.
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Affiliation(s)
- H Ohta
- Department of Chemistry, Graduate School of Science, Kyoto University, Japan.
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12
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Jenniskens P, Shaddad MH, Numan D, Elsir S, Kudoda AM, Zolensky ME, Le L, Robinson GA, Friedrich JM, Rumble D, Steele A, Chesley SR, Fitzsimmons A, Duddy S, Hsieh HH, Ramsay G, Brown PG, Edwards WN, Tagliaferri E, Boslough MB, Spalding RE, Dantowitz R, Kozubal M, Pravec P, Borovicka J, Charvat Z, Vaubaillon J, Kuiper J, Albers J, Bishop JL, Mancinelli RL, Sandford SA, Milam SN, Nuevo M, Worden SP. The impact and recovery of asteroid 2008 TC(3). Nature 2009. [PMID: 19325630 DOI: 10.1038/nature07920.] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
In the absence of a firm link between individual meteorites and their asteroidal parent bodies, asteroids are typically characterized only by their light reflection properties, and grouped accordingly into classes. On 6 October 2008, a small asteroid was discovered with a flat reflectance spectrum in the 554-995 nm wavelength range, and designated 2008 TC(3) (refs 4-6). It subsequently hit the Earth. Because it exploded at 37 km altitude, no macroscopic fragments were expected to survive. Here we report that a dedicated search along the approach trajectory recovered 47 meteorites, fragments of a single body named Almahata Sitta, with a total mass of 3.95 kg. Analysis of one of these meteorites shows it to be an achondrite, a polymict ureilite, anomalous in its class: ultra-fine-grained and porous, with large carbonaceous grains. The combined asteroid and meteorite reflectance spectra identify the asteroid as F class, now firmly linked to dark carbon-rich anomalous ureilites, a material so fragile it was not previously represented in meteorite collections.
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Affiliation(s)
- P Jenniskens
- SETI Institute, Carl Sagan Center, 515 North Whisman Road, Mountain View, California 94043, USA.
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13
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Chang CF, Hu Z, Wu H, Burnus T, Hollmann N, Benomar M, Lorenz T, Tanaka A, Lin HJ, Hsieh HH, Chen CT, Tjeng LH. Spin blockade, orbital occupation, and charge ordering in La1.5Sr0.5CoO4. Phys Rev Lett 2009; 102:116401. [PMID: 19392219 DOI: 10.1103/physrevlett.102.116401] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2008] [Indexed: 05/27/2023]
Abstract
Using Co-L2,3 and O-K x-ray absorption spectroscopy, we reveal that the charge ordering in La1.5Sr0.5CoO4 involves high spin (S=3/2) Co2+ and low spin (S=0) Co3+ ions. This provides evidence for the spin-blockade phenomenon as a source for the extremely insulating nature of the La2-xSrxCoO4 series. The associated e{g}{2} and e{g}{0} orbital occupation accounts for the large contrast in the Co-O bond lengths and, in turn, the high charge ordering temperature. Yet, the low magnetic ordering temperature is naturally explained by the presence of the nonmagnetic (S=0) Co3+ ions. From the identification of the bands we infer that La1.5Sr0.5CoO4 is a narrow band material.
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Affiliation(s)
- C F Chang
- II. Physikalisches Institut, Universität zu Köln, Zülpicher Strasse 77, 50937 Köln, Germany
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14
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Hansmann P, Severing A, Hu Z, Haverkort MW, Chang CF, Klein S, Tanaka A, Hsieh HH, Lin HJ, Chen CT, Fåk B, Lejay P, Tjeng LH. Determining the crystal-field ground state in rare earth heavy fermion materials using soft-x-ray absorption spectroscopy. Phys Rev Lett 2008; 100:066405. [PMID: 18352496 DOI: 10.1103/physrevlett.100.066405] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2007] [Indexed: 05/26/2023]
Abstract
We infer that soft-x-ray absorption spectroscopy is a versatile method for the determination of the crystal-field ground state symmetry of rare earth heavy fermion systems, complementing neutron scattering. Using realistic and universal parameters, we provide a theoretical mapping between the polarization dependence of Ce M(4,5) spectra and the charge distribution of the Ce 4f states. The experimental resolution can be orders of magnitude larger than the 4f crystal-field splitting itself. To demonstrate the experimental feasibility of the method, we investigated CePd2Si2, thereby settling an existing disagreement about its crystal-field ground state.
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Affiliation(s)
- P Hansmann
- II. Physikalisches Institut, Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany
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15
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Elfimov IS, Rusydi A, Csiszar SI, Hu Z, Hsieh HH, Lin HJ, Chen CT, Liang R, Sawatzky GA. Magnetizing oxides by substituting nitrogen for oxygen. Phys Rev Lett 2007; 98:137202. [PMID: 17501234 DOI: 10.1103/physrevlett.98.137202] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2006] [Indexed: 05/15/2023]
Abstract
We describe a possible pathway to new magnetic materials with no conventional magnetic elements present. The substitution of nitrogen for oxygen in simple nonmagnetic oxides leads to holes in N 2p states which form local magnetic moments. Because of the very large Hund's rule coupling of Nitrogen and O 2p electrons and the rather extended spatial extent of the wave functions these materials are predicted to be ferromagnetic metals or small band gap insulators. Experimental studies support the theoretical calculations with regard to the basic electronic structure and the formation of local magnetic moments. It remains to be seen if these materials are magnetically ordered and, if so, below what temperature.
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Affiliation(s)
- I S Elfimov
- Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, British Columbia, Canada
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16
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Haverkort MW, Hu Z, Cezar JC, Burnus T, Hartmann H, Reuther M, Zobel C, Lorenz T, Tanaka A, Brookes NB, Hsieh HH, Lin HJ, Chen CT, Tjeng LH. Spin state transition in LaCoO3 studied using soft x-ray absorption spectroscopy and magnetic circular dichroism. Phys Rev Lett 2006; 97:176405. [PMID: 17155490 DOI: 10.1103/physrevlett.97.176405] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2006] [Indexed: 05/12/2023]
Abstract
Using soft x-ray absorption spectroscopy and magnetic circular dichroism at the Co-L(2,3) edge, we reveal that the spin state transition in LaCoO3 can be well described by a low-spin ground state and a triply degenerate high-spin first excited state. From the temperature dependence of the spectral line shapes, we find that LaCoO3 at finite temperatures is an inhomogeneous mixed-spin state system. It is crucial that the magnetic circular dichroism signal in the paramagnetic state carries a large orbital momentum. This directly shows that the currently accepted low- or intermediate-spin picture is at variance. Parameters derived from these spectroscopies fully explain existing magnetic susceptibility, electron spin resonance, and inelastic neutron data.
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Affiliation(s)
- M W Haverkort
- II. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany
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17
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Koethe TC, Hu Z, Haverkort MW, Schüssler-Langeheine C, Venturini F, Brookes NB, Tjernberg O, Reichelt W, Hsieh HH, Lin HJ, Chen CT, Tjeng LH. Transfer of spectral weight and symmetry across the metal-insulator transition in VO(2). Phys Rev Lett 2006; 97:116402. [PMID: 17025910 DOI: 10.1103/physrevlett.97.116402] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2006] [Indexed: 05/12/2023]
Abstract
We present a detailed study of the valence and conduction bands of VO2 across the metal-insulator transition using bulk-sensitive photoelectron and O K x-ray absorption spectroscopies. We observe a giant transfer of spectral weight with distinct features that require an explanation which goes beyond the Peierls transition model as well as the standard single-band Hubbard model. Analysis of the symmetry and energies of the bands reveals the decisive role of the V 3d orbital degrees of freedom. Comparison to recent realistic many body calculations shows that much of the k dependence of the self-energy correction can be cast within a dimer model.
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Affiliation(s)
- T C Koethe
- II. Physikalisches Institut, Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany
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18
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Wu H, Hu Z, Burnus T, Denlinger JD, Khalifah PG, Mandrus DG, Jang LY, Hsieh HH, Tanaka A, Liang KS, Allen JW, Cava RJ, Khomskii DI, Tjeng LH. Orbitally driven spin-singlet dimerization in S=1 La4Ru2O10. Phys Rev Lett 2006; 96:256402. [PMID: 16907328 DOI: 10.1103/physrevlett.96.256402] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2006] [Indexed: 05/11/2023]
Abstract
Using x-ray absorption spectroscopy at the Ru-L2,3 edge we reveal that the Ru4+ ions remain in the S=1 spin state across the rare 4d-orbital ordering transition and spin-gap formation. We find using local spin density approximation + Hubbard U band structure calculations that the crystal fields in the low-temperature phase are not strong enough to stabilize the S=0 state. Instead, we identify a distinct orbital ordering with a significant anisotropy of the antiferromagnetic exchange couplings. We conclude that La4Ru2O10 appears to be a novel material in which the orbital physics drives the formation of spin-singlet dimers in a quasi-two-dimensional S=1 system.
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Affiliation(s)
- Hua Wu
- II. Physikalisches Institut, Universität zu Köln, 50937 Köln, Germany
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19
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Haverkort MW, Hu Z, Tanaka A, Reichelt W, Streltsov SV, Korotin MA, Anisimov VI, Hsieh HH, Lin HJ, Chen CT, Khomskii DI, Tjeng LH. Orbital-assisted metal-insulator transition in VO2. Phys Rev Lett 2005; 95:196404. [PMID: 16384003 DOI: 10.1103/physrevlett.95.196404] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2005] [Indexed: 05/05/2023]
Abstract
We found direct experimental evidence for an orbital switching in the V 3d states across the metal-insulator transition in VO2. We have used soft-x-ray absorption spectroscopy at the V L2,3 edges as a sensitive local probe and have determined quantitatively the orbital polarizations. These results strongly suggest that, in going from the metallic to the insulating state, the orbital occupation changes in a manner that charge fluctuations and effective bandwidths are reduced, that the system becomes more one dimensional and more susceptible to a Peierls-like transition, and that the required massive orbital switching can only be made if the system is close to a Mott insulating regime.
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Affiliation(s)
- M W Haverkort
- II. Physikalisches Institut, Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany
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20
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Csiszar SI, Haverkort MW, Hu Z, Tanaka A, Hsieh HH, Lin HJ, Chen CT, Hibma T, Tjeng LH. Controlling orbital moment and spin orientation in CoO layers by strain. Phys Rev Lett 2005; 95:187205. [PMID: 16383942 DOI: 10.1103/physrevlett.95.187205] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2004] [Indexed: 05/05/2023]
Abstract
We have observed that CoO films grown on different substrates show dramatic differences in their magnetic properties. Using polarization dependent x-ray absorption spectroscopy at the Co L2,3 edges, we revealed that the magnitude and orientation of the magnetic moments strongly depend on the strain in the films induced by the substrate. We presented a quantitative model to explain how strain together with the spin-orbit interaction determine the 3d orbital occupation, the magnetic anisotropy, as well as the spin and orbital contributions to the magnetic moments. Control over the sign and direction of the strain may, therefore, open new opportunities for applications in the field of exchange bias in multilayered magnetic films.
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Affiliation(s)
- S I Csiszar
- Materials Science Center, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
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21
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Haverkort MW, Hu Z, Tanaka A, Ghiringhelli G, Roth H, Cwik M, Lorenz T, Schüssler-Langeheine C, Streltsov SV, Mylnikova AS, Anisimov VI, de Nadai C, Brookes NB, Hsieh HH, Lin HJ, Chen CT, Mizokawa T, Taguchi Y, Tokura Y, Khomskii DI, Tjeng LH. Determination of the orbital moment and crystal-field splitting in LaTiO3. Phys Rev Lett 2005; 94:056401. [PMID: 15783666 DOI: 10.1103/physrevlett.94.056401] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2004] [Indexed: 05/24/2023]
Abstract
Utilizing a sum rule in a spin-resolved photoelectron spectroscopic experiment with circularly polarized light, we show that the orbital moment in LaTiO3 is strongly reduced from its ionic value, both below and above the Ne el temperature. Using Ti L2,3 x-ray absorption spectroscopy as a local probe, we found that the crystal-field splitting in the t2g subshell is about 0.12-0.30 eV. This large splitting does not facilitate the formation of an orbital liquid.
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Affiliation(s)
- M W Haverkort
- II. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, D-50937 Köln, Germany
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22
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Hu Z, Wu H, Haverkort MW, Hsieh HH, Lin HJ, Lorenz T, Baier J, Reichl A, Bonn I, Felser C, Tanaka A, Chen CT, Tjeng LH. Different look at the spin state of Co(3+) ions in a CoO(5) pyramidal coordination. Phys Rev Lett 2004; 92:207402. [PMID: 15169382 DOI: 10.1103/physrevlett.92.207402] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2003] [Indexed: 05/24/2023]
Abstract
Using soft-x-ray absorption spectroscopy at the Co L(2,3) and O K edges, we demonstrate that the Co3+ ions with the CoO5 pyramidal coordination in the layered Sr2CoO3Cl compound are unambiguously in the high spin state. Our result questions the reliability of the spin state assignments made so far for the recently synthesized layered cobalt perovskites and calls for a reexamination of the modeling for the complex and fascinating properties of these new materials.
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Affiliation(s)
- Z Hu
- II. Physikalisches Institut, Universität zu Köln, Zülpicher Strasse 77, 50937 Köln, Germany
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23
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Altieri S, Finazzi M, Hsieh HH, Lin HJ, Chen CT, Hibma T, Valeri S, Sawatzky GA. Magnetic dichroism and spin structure of antiferromagnetic NiO(001) films. Phys Rev Lett 2003; 91:137201. [PMID: 14525332 DOI: 10.1103/physrevlett.91.137201] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2002] [Indexed: 05/24/2023]
Abstract
We find that Ni L2 edge x-ray magnetic linear dichroism is fully reversed for NiO(001) films on materials with reversed lattice mismatch. We relate this phenomenon to a preferential stabilization of magnetic S domains with main spin component either in or out of the plane, via dipolar interactions. This suggests a way to selectively control spin structures in 3d systems with small spin-orbit coupling.
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Affiliation(s)
- S Altieri
- INFM-National Center on Nanostructures and Biosystems at Surfaces (S3), via G. Campi 213/A, I-41100 Modena, Italy
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Abstract
Emphysematous pyelonephritis in renal transplant allograft occurs rarely. This is a case report on a 55-year-old man who had renal transplantation in 1983 and developed post-transplant diabetes mellitus in 1984. This patient suffered from fever and right low abdominal pain and was subsequently diagnosed as emphysematous pyelonephritis by computerized tomography. He was successfully treated with percutaneous drainage, percutaneous nephrostomy and parenteral antibiotics. Although the management of emphysematous pyelonephritis has been a subject of controversy, we recommend consideration of renal preservation in patients with few risk factors, especially in those patients presenting with chronic renal insufficiency, solitary kidney and transplant allograft.
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Affiliation(s)
- Y T Cheng
- Department of Urology, Chang Gung Memorial Hospital, Kaohsiung, Taiwan
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25
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Affiliation(s)
- Y S Chien
- Department of Nephrology, Chang Gung Memory Hospital, Kaohsiung, Taiwan
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26
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Hsieh HH, Chien YS, Hsu KT, Chung HM, Huang HF. Risk factors for renal allograft survival in patients receiving cyclosporine immunosuppression. J Formos Med Assoc 2000; 99:453-8. [PMID: 10925550] [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] [Indexed: 02/17/2023] Open
Abstract
BACKGROUND AND PURPOSE Although cyclosporine (CsA) has been widely used in renal transplantation for more than 10 years, no large series of renal transplant patients has been studied in southern Taiwan. The purpose of this retrospective cohort study was to investigate the risk factors for graft survival in renal transplant recipients. METHODS From August 1987 to January 1998, 101 primary cadaveric renal transplantations were performed. The minimum follow-up period was 1 year. CsA and prednisolone were initially used as immunosuppressive agents in all patients. Use of lower doses of CsA to reduce CsA trough level (50-99 ng/mL) in hepatitis B surface antigen (HBsAg)-positive recipients was attempted at 6 months after transplantation. RESULTS Graft actuarial survival rates at 1, 5, and 10 years posttransplantation were 89%, 75%, and 57%, respectively. Acute rejection and increased recipient age were found to be significant risk factors (p < 0.05) affecting graft survival, with hazard ratios of 5.20 and 1.74, respectively, by multivariate analysis using a Cox proportional hazards model. Hepatitis B and/or hepatitis C infection had no influence on graft survival. CONCLUSIONS In this series of cadaveric renal allograft patients, the risk factors affecting allograft survival were acute rejection and recipient age.
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Affiliation(s)
- H H Hsieh
- Department of Surgery, Chang Gung Memorial Hospital, Kaohsiung Hsien, Taiwan
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27
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Lee WC, Hsieh HH. Retroperitoneoscopic ureterolithotomy for impacted ureteral stones. Chang Gung Med J 2000; 23:28-32. [PMID: 10746407] [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: 02/16/2023]
Abstract
BACKGROUND Despite the fact that extracorporeal shock wave lithotripsy and endourological procedures have greatly diminished the need for open ureterolithotomy, invasive open surgery is still necessary in some cases of obstinate ureteral stones when less invasive methods fail. Since Wickham first performed a retroperitoneoscopic ureterolithotomy in 1979, procedures which are less invasive than open ureterolithotomy have been available in some selected cases. METHODS In 1997, retroperitoneoscopic ureterolithotomy was performed in 5 patients with ureteral stones, in whom treatment with other minimally invasive procedures had failed. Using Gaur's technique of balloon dissection of the retroperitoneal space, retroperitoneoscopic ureterolithotomy was successfully performed in all cases. RESULTS All the patients were treated successfully with the retroperitoneoscopic maneuver. The average operating time was 125 (90 to 175) minutes, and the average blood loss was 75 (20 to 200) ml. No patient required an analgesic injection postoperatively. The average postoperative hospital stay was 5.5 (4 to 8) days, and there were no immediate operative complications in any case. Patients were followed an average of 18.5 (13 to 24) months. A ureteral stricture developed in one patient and was resolved by ureteroureterostomy 3 months after the first operation. CONCLUSION As an impacted ureteral stone is always associated with chronic ureteritis, firmness and adhesion of the periureteral tissue make the retroperitoneoscopic procedure difficult. In one case, a late complication of ureteral stricture may have been due to pre-existing severe chronic inflammation. Based on our limited experience, retroperitoneoscopic ureterolithotomy provides a practical alternative for the management of ureteral stones in selected patients. An expert clinician with experience in this procedure will provide the best results.
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Affiliation(s)
- W C Lee
- Department of Surgery, Chang Gung Memorial Hospital, Kaohsiung, Taiwan, R.O.C
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Abstract
Despite its merits, the Western-style psychiatric community rehabilitation model is not well accepted by caregivers in Taiwan. We examined factors affecting the utilization of community rehabilitation programs in Taiwan. Our stepwise logistic regression revealed that psychoeducation regarding the biological cause of schizophrenia emerged as the major factor for increasing utilization treatment modality. Eighty-nine pairs of schizophrenic patients (who had been recommended for rehabilitation) and their relatives were divided into two groups, the rehabilitation group and the nonrehabilitation group. Both groups were surveyed on help-seeking behavior scales and mental function measurements. The results showed no significant differences in patients' psychopathology, though the rehabilitation group had higher employment rates. As for caregivers, the rehabilitation group scored significantly better on some cognitive appraisals, whereas the nonrehabilitation group was more inclined to institutionalize the patients for life. No significant differences were noticed on rejection attitude, subjective care burden, or expressed emotion measures. Improving caregiver's knowledge about the disease, providing activities that lend emotional, physical, and financial support and thereby reduce the burden and increase the satisfaction of caregivers may be useful. Besides making the Western-style psychiatric community rehabilitation model more effective and accessible for patients and caregivers in Taiwan, cultural adaptation is also needed.
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Affiliation(s)
- Y K Yang
- Department of Psychiatry, National Cheng Kung University Medical College, Tainan, Taiwan
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29
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Pong WF, Liou YC, Chang KH, Tsai MH, Hsieh HH, Chang YK, Tseng PK, Lee JF, Liou Y, Huang JC. Structural transition in epitaxial Co/Cr multilayers as studied by X-ray-absorption spectroscopy. J Synchrotron Radiat 1999; 6:746-748. [PMID: 15263445 DOI: 10.1107/s0909049598015982] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/1998] [Accepted: 11/26/1998] [Indexed: 05/24/2023]
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Pong WF, Lin KP, Chang YK, Tsai MH, Hsieh HH, Pieh JY, Tseng PK, Lee JF, Hsu LS. Electronic structure of Ni3Al and Ni3Ga alloys. J Synchrotron Radiat 1999; 6:731-733. [PMID: 15263440 DOI: 10.1107/s0909049598016203] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/1998] [Accepted: 12/01/1998] [Indexed: 05/24/2023]
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Lee TY, Ko SF, Wan YL, Cheng YF, Yang BY, Huang DL, Hsieh HH, Yu TJ, Chen WJ. Renal squamous cell carcinoma: CT findings and clinical significance. Abdom Imaging 1998; 23:203-8. [PMID: 9516518 DOI: 10.1007/s002619900324] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND To study the biological behavior of renal squamous cell carcinoma (RSCC). METHODS Fifteen cases of RSCC were retrospectively studied. These cases were classified as central (eight cases) and peripheral (seven cases) types by the tumor location. The clinical data and computed tomographic findings were analyzed and compared. RESULTS High incidence (87%) of urolithiasis was observed. The prognosis of RSCC was very poor, with a median survival time of 3.5 months. The infectious symptoms, central location, and modified stage IV of the tumor were the poor prognostic factors of RSCC. Two types of RSCC were different in the presenting symptoms, lymph node metastasis, modified tumor staging, and survival time. CONCLUSION The central and peripheral types of RSCC were different biologically. High index of suspicion should be maintained when identifying the subtle clues of malignancy in patients with urolithiasis.
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Affiliation(s)
- T Y Lee
- Department of Diagnostic Radiology, Chang Gung Memorial Hospital at Kaohsiung and Likou, Chang Gung College of Medicine and Technology, Kaohsiung Hsien, Taiwan
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Abstract
PURPOSE To report on unusual imaging presentations in renal transitional cell carcinoma (TCC). MATERIAL AND METHODS Imaging studies of 140 cases of pathologically proven renal TCC were retrospectively studied with the focus on unusual presentations. RESULTS Unusual imaging manifestations were found in 20 cases (14.3%). These findings were classified into 5 categories: perirenal abscesses or perirenal hematomas in 6 cases; parenchymal masses in 5; undue thickening of the hydronephrotic wall in 4; "tuberculoid" pyelograms in 3; and tumors with massive necrosis in 2. CONCLUSION Deceptive imaging presentations may occur in renal TCC. Recognition of these presentations may help to prevent delay in diagnosis.
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Affiliation(s)
- T Y Lee
- Department of Diagnostic Radiology, Chang Gung Memorial Hospital, Kaohsiung, Chang Gung College of Medicine and Technology, Kaohsiung Hsien, Taiwan
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Pong WF, Su MH, Tsai M, Hsieh HH, Pieh JY, Chang YK, Kuo KC, Tseng PK, Lee JF, Chung SC, Chen CI, Tsang KL, Chen CT. Oxygen 1s x-ray-absorption near-edge structure of Zn-Ni ferrites: A comparison with the theoretical calculations. Phys Rev B Condens Matter 1996; 54:16641-16645. [PMID: 9985789 DOI: 10.1103/physrevb.54.16641] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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35
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Yu MW, Hsieh HH, Pan WH, Yang CS, CHen CJ. Vegetable consumption, serum retinol level, and risk of hepatocellular carcinoma. Cancer Res 1995; 55:1301-5. [PMID: 7882326] [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] [Indexed: 01/27/2023]
Abstract
A cohort of 8436 men in Taiwan was recruited with personal interview and blood sample collection between 1984 and 1986. During the 5-year follow-up period, 50 incident cases of hepatocellular carcinoma (HCC) were identified. Retinol levels were measured for 35 HCC patients whose serum samples were available and 140 matched controls randomly selected from cohort members without HCC. Lower vegetable intake was significantly associated with an increased risk of HCC after adjustment for other HCC risk factors (P = 0.006). The effect of low vegetable intake on HCC risk was limited to hepatitis B virus chronic carriers and cigarette smokers. As compared with subjects who had a weekly vegetable consumption frequency of six or more meals, the multivariate-adjusted relative risk of HCC for subjects who had a frequency of less than six meals was 4.7 (95% confidence interval, 2.0-11.1; P = 0.0004) among chronic hepatitis B virus carriers and 3.8 (95% confidence interval, 1.7-8.5; P = 0.001) among cigarette smokers. There was an inverse dose-response relationship between the prediagnostic serum retinol level and the development of HCC (trend test, P = 0.003). The odds ratio of HCC for men with a retinol level in the lowest tertile was 9.0 (95% confidence interval, 2.1-39.1) compared with those with a level in the highest tertile. The relation remained after multivariate adjustment for cigarette smoking, habitual alcohol drinking, and either the seropositivity of hepatitis B virus surface antigen and/or anti-hepatitis C virus antibody or the past history of liver diseases through conditional logistic regression analysis. The association was more striking for men 55 years or younger and for those who smoked 10 or more cigarettes/day. There was a significant synergistic effect of hepatitis B virus surface antigen carrier status and low serum retinol level on the development of HCC. These data suggest a potential role of retinol in the chemoprevention of HCC.
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Affiliation(s)
- M W Yu
- Department of Public Health, National Taiwan University, Taipei
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Huang CH, Chen L, Hsieh HH. Choriocarcinoma presenting as a unilateral renal mass and gross hematuria in a male: report of a case. J Formos Med Assoc 1992; 91:922-5. [PMID: 1363396] [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] [Indexed: 03/25/2023] Open
Abstract
Choriocarcinoma of the kidney, either primary or metastatic, is rarely reported in the literature. We encountered a male patient with choriocarcinoma of the right kidney. The patient initially presented with fever, gross hematuria and flank pain. He had initially been unsuccessfully treated for bilateral renal stones for four months before an accurate diagnosis was made. The disease was verified only after a resection of the right kidney and meticulous examination of microscopic sections of the tumor. Further immunohistochemical study strongly supported the diagnosis of choriocarcinoma. The tumor responded briefly to Cisplatinum, Vinblastine and Bleomycin (PVB) treatment. The patient died of brain metastasis and respiratory failure four months after starting systemic chemotherapy.
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Affiliation(s)
- C H Huang
- Department of Internal Medicine, Chang Gung Memorial Hospital, Kao-Hsiung, Taiwan R.O.C
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Huang CH, Hsieh HH, Wang JM, Hsu K, Yang WC, Yu TJ. Methotrexate, vinblastine, adriamycin and cisplatin (M-VAC) for advanced TCC of urothelium. J Formos Med Assoc 1992; 91:699-703. [PMID: 1360298] [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] [Indexed: 03/25/2023] Open
Abstract
After the introduction of methotrexate, vinblastine, adriamycin and cisplatin combination (M-VAC) chemotherapy for transitional cell carcinoma (TCC) of the urothelium, the reported response and survival rates improved when compared with the previous regimens. From July 1989 to March 1991, 43 consecutive cases of invasive or metastatic TCC that had received at least one course of M-VAC treatment were collected by a computer-assisted search and analyzed. The overall response rate, including complete response (CR) and partial response (PR), was 44% (CR, 16%; PR, 28%). Tumors originating from the renal pelvis or bladder responded better than those from the ureter (kidney, 57%; bladder, 42%; and ureter 30%). Lymph node, soft tissue, lung metastases and local recurrent tumors had a greater chance of response than bone or liver metastases. Although patients from the blackfoot disease endemic area seemed to respond better than those from the nonendemic area, there was no statistically significant survival benefit. The duration of follow-up ranged from nine to 38 months. The length of survival of nonresponders ranged from one month to 19 months (median, eight months; mean, seven months). Ten of the 19 responders relapsed, and the others were still responding. Three patients (7%) survived two years, disease-free. Although the response rate improved, the chance of long-term survival was still unsatisfactory in our study.
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Affiliation(s)
- C H Huang
- Department of Internal Medicine, Chang Gung Memorial Hospital, Kaohsiung, Taiwan, R.O.C
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Abstract
Three cases of urachal abscess with extensive interstitial inflammation and fibrosis are reported. Clinically, all patients had a lower abdominal mass and CT scan and ultrasonic examination revealed a large tumour located anterior or superior to the bladder. They all underwent laparotomy and had either a partial cystectomy or an en bloc resection of the bladder and adjacent organs due to severe adhesions. Microscopic examination of the specimens revealed no evidence of carcinoma and only abscess formation with extensive chronic interstitial inflammation and fibrosis were seen. In one case, residual columnar epithelium suggestive of urachal origin was identified in the abscess cavity. Urachal abscess should be considered when dealing with lower abdominal masses.
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Affiliation(s)
- W J Chen
- Department of Pathology, Chang-Gung Memorial Hospital, Kaohsiung, Taiwan, China
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Bhatia SC, Hsieh HH, Theesen KA, Townley RG, Andersen JM, Weiss S, Agrawal DK. Platelet alpha-2 adrenoreceptor activity pre-treatment and post-treatment in major depressive disorder with melancholia. Res Commun Chem Pathol Pharmacol 1991; 74:47-57. [PMID: 1666199] [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
Changes in alpha-2 adrenoreceptor density and affinity during antidepressant treatment were studied using 3H-yohimbine binding to human platelet membranes. Baseline measurements were conducted in 21 patients diagnosed as having major depressive disorder with melancholia, and an equal number of age and sex matched normal controls. No differences were observed in receptor density or binding between pre-treatment subject groups and normal matched controls. Subjects participated for 6 weeks in a trial of placebo, adinazolam, or amitriptyline. Alpha-2 adrenoreceptor binding was not significantly changed from baseline following antidepressant treatment.
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Affiliation(s)
- S C Bhatia
- Department of Psychiatry, Creighton University, Omaha, NE 68178
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Hsieh HH, Lee CJ, Chuang CY, Lo HM. Low oxygenation index and pulmonary artery hypertension in predicting early death from adult respiratory distress syndrome (ARDS). J Formos Med Assoc 1990; 89:443-9. [PMID: 1977859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Hemodynamic and respiratory parameters were continuously monitored in 45 septic shock patients, 15 of whom developed adult respiratory distress syndrome (ARDS). Low oxygenation index (OI = PaO2/FIO2), pulmonary artery hypertension (high mean pulmonary artery pressure, MPAP) and elevated pulmonary vascular resistance (PVR) were observed in all ARDS, as well as in non-ARDS septic patients, as a baseline. These same pulmonary factors were compared between those who survived and those who died during the first few days (early fatalities) in both the ARDS group (5 patients) and the non-ARDS group (8 patients). The results showed that the early fatalities in the ARDS group had a significantly lower (p less than 0.001) OI than the survivors, as well as a lower MPAP (p less than 0.01). In the non-ARDS group, the MPAP of the early fatalities was significantly lower (p less than 0.01) than that of survivors, but their OI was not significantly lower. PVR, when compared between groups (ARDS versus non-ARDS) or between subgroups within each group, was elevated concurrently with the elevation of MPAP. It is concluded that patients with septic shock and ARDS who show a severely depressed OI and a modestly elevated MPAP and PVR during the first few days can be predicted to have a poor outcome.
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Affiliation(s)
- H H Hsieh
- Department of Internal Medicine, Provincial Tao-Yuan General Hospital, Taiwan, R.O.C
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Abstract
Several studies have suggested an association between the farm crisis of the 1980's and the increase in mental health problems in rural America. A stress hypothesis for alcoholism would indeed predict such an association. The study presented herein examines the rate of new referrals for treatment of alcohol abuse and/or dependence to state-funded agencies in Nebraska. Between mid-1978 and mid-1986, the rate of subjects seeking treatment grew steadily, paralleling an increase in both population and available treatment programs. Yet, the total number of farmers seeking treatment peaked around 1982 and declined steadily thereafter, outpacing any change in the total number of farmers in the state. Possible interpretations of these findings are discussed.
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Affiliation(s)
- H H Hsieh
- Creighton Psychiatric Associates, Omaha, Nebraska 68108
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Affiliation(s)
- H H Hsieh
- Creighton University, Omaha, Nebraska
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Tsai HJ, Hsieh HH. [Adult polycystic kidneys associated with transitional cell carcinoma--a case report]. Changgeng Yi Xue Za Zhi 1987; 10:257-62. [PMID: 3331961] [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: 01/05/2023]
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Hsieh HH, Wong W, Chiang S, Lo HM, Lee CJ. Changes in fluid balance during the treatment of septic shock. Taiwan Yi Xue Hui Za Zhi 1987; 86:932-40. [PMID: 3694164] [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: 01/07/2023]
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Abstract
Many studies show a higher rate of birth of schizophrenic patients during the winter and early spring months. This is particularly prominent in studies involving northern European countries and the northern part of the United States. The interpretations for this apparent seasonality remain highly speculative. We examined the seasons of birth of 472 patients carrying the diagnosis of schizophrenia. We also studied the gender and paranoid vs nonparanoid subtypes of this subject group. The total group does not show an excess of winter births. The same is true for total male (n = 193) and total female (n = 279) schizophrenic patients. The different subtypes of female patients show a homogenous distribution by seasons of birth; but the male paranoid schizophrenia group (n = 102) shows a significant increase of births during the first quarter of the year. The findings are interpreted according to the prevailing hypotheses of schizophrenia. The implications of these findings are discussed.
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Khan MH, Hsieh HH, Singh M. Neuroleptic malignant syndrome. Nebr Med J 1986; 71:98-100. [PMID: 3703060] [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: 01/07/2023]
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Hsieh HH, Bhatia SC, Andersen JM, Cheng SC. Psychotropic medication and nonfatal cafe coronary. J Clin Psychopharmacol 1986; 6:101-2. [PMID: 3700693] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Obstructive asphyxia, also known as cafe coronary, has been linked to both medicated and nonmedicated psychiatric patients. An 18-month prospective audit of choking patients was conducted in a psychiatric hospital. Based upon all medications received in the 5 days preceding the event, mean daily chlorpromazine and atropine equivalent dosages were also calculated for age, sex, and diagnosis matched controls based upon all medications received during their entire hospital stay. Paired t-tests showed no significant differences between choking patients and their matched controls except that greater mean daily chlorpromazine equivalents were present in the severe choking subgroup. Computation of log odds of choking risk increases with interaction of increased mean doses of each drug type and age, and also with interaction of increased chlorpromazine equivalents and increased atropine equivalents. Patients receiving high dosages of drug(s) with antidopaminergic or anticholinergic activity are at greater risk of choking and should be monitored closely.
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Abstract
Experiments were carried out to determine the optimum conformity between the femoral and tibial condyles in condylar replacement knee prostheses. Wear tests and observations from removed prostheses indicated that both high and low conformity produced characteristic abrasion and fatigue. Partly conforming condyles provided stability under load-bearing but allowed laxity to occur. Fixation to resist the various forces on the tibial components was enhanced by a short central intramedullary peg. Partial conformity is proposed as the optimum configuration between femoral and tibial components.
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Hsieh HH, Walker PS. The effect of compressive load of the stability of the knee joint [proceedings]. Bull Hosp Joint Dis 1977; 38:10-4. [PMID: 922196] [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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