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Dumane VA, Chum T, Tseng TC, Sheu R, Liu T, Rosenzweig K. Multi-Criteria Optimization and RapidPlan for Improved Organs at Risk Sparing in Treatment Planning of Malignant Pleural Mesothelioma. Int J Radiat Oncol Biol Phys 2023; 117:e662-e663. [PMID: 37785962 DOI: 10.1016/j.ijrobp.2023.06.2100] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Treatment planning for malignant pleural mesothelioma is complex and time-consuming owing to the large volume of the target as well as its overlap and proximity to critical organs. Knowledge-based planning (KBP) model using RapidPlan (RP) was previously developed and clinically tested at our institution for treatment planning of these cases that had undergone pleurectomy-decortication, and therefore had two intact-lungs. The aim of this work is to investigate if multi-criteria optimization (MCO) can further improve the RP model with respect to organ at risk (OAR) sparing without compromising target coverage. MATERIALS/METHODS The RP model was trained with clinically accepted plans of 57 patients that used Volumetric Modulated Arc Therapy (VMAT) with 2 partial arcs and 6 MV photons. The dose volume histogram (DVH) estimation model was trained to estimate doses to the heart, ipsilateral lung, total lung, contralateral lung, stomach, esophagus, kidneys and liver. Clinical treatment plans for 12 patients were re-planned using RP as well as a combination of RP and MCO. Application of MCO was after RP and used tradeoff exploration to navigate to the improved dose distribution on a Pareto surface. Selection of a plan that further improved OAR sparing while maintaining coverage constraints of PTV D95 and V95 ≥ 94% was made. Dosimetric parameters for clinical plans (CP), plans using RP as well as plans generated with RP and MCO were all compared for 12 new validation cases. Wilcoxon sign-rank test was used for statistical significance testing. RESULTS The mean heart dose was reduced from 20.9 Gy ± 3.2 Gy for CP to 17.1 Gy ± 4.2 Gy with RP and further to 13.8 Gy ± 3.3 Gy with RP and MCO. The heart V30 Gy was reduced from 23.7% ± 8% to 18.2% ± 9.4% with RP and further to 13.6% ± 5.7% with RP and MCO. The corresponding results for contralateral lung V5 Gy were 68.6% ± 14.1% with CP, 50% ± 26.3% with RP and 45.3% ± 22.8% with RP and MCO, while the mean esophagus dose was reduced from 26.5 Gy ± 3.1 Gy to 21.5 Gy ± 4.7 Gy with RP and further to 19.1 Gy ± 4.2 Gy with RP and MCO. All these dosimetric improvements were statistically significant (p<0.001). However, improvements with RP and MCO for the total lung mean and V20 Gy, liver mean, stomach mean and kidney V18 Gy were marginal over the RP. Sparing of ipsilateral lung V20 Gy was maintained at ≥ 50 cc on average for all plans. PTV D95 and V95 were both normalized at 94%. CONCLUSION Combination of RP and MCO significantly improved sparing of the OARs, especially the heart, contralateral lung and esophagus without compromising coverage or doses to other structures. Since doses to the heart, and contralateral lung are known to correlate with incidence of radiation pneumonitis, it would be prudent to consider planning with both RP and MCO to help determine the optimal treatment plan for the individual patient's anatomy.
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Affiliation(s)
- V A Dumane
- Icahn School of Medicine at Mount Sinai, Department of Radiation Oncology, New York, NY
| | - T Chum
- Mount Sinai Hospital New York, New York, NY
| | - T C Tseng
- Icahn School of Medicine at Mount Sinai Department of Radiation Oncology, New York, NY
| | - R Sheu
- Icahn School of Medicine at Mount Sinai, New York, NY
| | - T Liu
- Icahn School of Medicine at Mount Sinai, New York, NY
| | - K Rosenzweig
- Department of Radiation Oncology, Icahn School of Medicine at Mount Sinai, New York, NY
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Lai CH, Fung HS, Wu WB, Huang HY, Fu HW, Lin SW, Huang SW, Chiu CC, Wang DJ, Huang LJ, Tseng TC, Chung SC, Chen CT, Huang DJ. Highly efficient beamline and spectrometer for inelastic soft X-ray scattering at high resolution. J Synchrotron Radiat 2014; 21:325-332. [PMID: 24562553 DOI: 10.1107/s1600577513030877] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Accepted: 11/10/2013] [Indexed: 06/03/2023]
Abstract
The design, construction and commissioning of a beamline and spectrometer for inelastic soft X-ray scattering at high resolution in a highly efficient system are presented. Based on the energy-compensation principle of grating dispersion, the design of the monochromator-spectrometer system greatly enhances the efficiency of measurement of inelastic soft X-rays scattering. Comprising two bendable gratings, the set-up effectively diminishes the defocus and coma aberrations. At commissioning, this system showed results of spin-flip, d-d and charge-transfer excitations of NiO. These results are consistent with published results but exhibit improved spectral resolution and increased efficiency of measurement. The best energy resolution of the set-up in terms of full width at half-maximum is 108 meV at an incident photon energy tuned about the Ni L3-edge.
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Affiliation(s)
- C H Lai
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - H S Fung
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - W B Wu
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - H Y Huang
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - H W Fu
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - S W Lin
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - S W Huang
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - C C Chiu
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - D J Wang
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - L J Huang
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - T C Tseng
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - S C Chung
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - C T Chen
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - D J Huang
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
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Tseng TC, Wang DJ, Perng SY, Kuan CK, Lin JR, Chang SH, Chen CT. Development of a novel aspherical mirror bender for an active grating. J Synchrotron Radiat 2003; 10:450-454. [PMID: 14551446 DOI: 10.1107/s090904950301954x] [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] [Subscribe] [Scholar Register] [Received: 01/09/2003] [Accepted: 09/04/2003] [Indexed: 05/24/2023]
Abstract
A novel monolithic mechanical bender has been designed and fabricated to meet the requirements of an active polynomial grating in a new soft X-ray scattering and emission beamline at the National Synchrotron Radiation Research Center, Taiwan. This compact bender achieves nearly fixed center point under different bending conditions. Moreover, the compact bender can be bent to a desirable third-order polynomial surface profile to cancel the defocus and coma aberrations using two PZT actuators. Theoretical analysis reveals that the grating has unprecedented spectral resolving power. A detailed mechanical analysis has been conducted and a prototype bender was fabricated and tested. The results indicate that the performance of the bender is excellent and is therefore suitable to be used in the active grating.
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Affiliation(s)
- T C Tseng
- National Synchrotron Radiation Research Center, Hsinchu Science-Based Industrial Park, Hsinchu 300, Taiwan.
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Tseng TC, Marfatia SM, Bryant PJ, Pack S, Zhuang Z, O'Brien JE, Lin L, Hanada T, Chishti AH. VAM-1: a new member of the MAGUK family binds to human Veli-1 through a conserved domain. Biochim Biophys Acta 2001; 1518:249-59. [PMID: 11311936 DOI: 10.1016/s0167-4781(01)00191-9] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The MAGUKs (membrane-associated guanylate kinase homologues) constitute a family of peripheral membrane proteins that function in tumor suppression and receptor clustering by forming multiprotein complexes containing distinct sets of transmembrane, cytoskeletal, and cytoplasmic signaling proteins. Here, we report the characterization of the human vam-1 gene that encodes a novel member of the p55 subfamily of MAGUKs. The complete cDNA sequence of VAM-1, tissue distribution of its mRNA, genomic structure, chromosomal localization, and Veli-1 binding properties are presented. The vam-1 gene is composed of 12 exons and spans approx. 115 kb. By fluorescence in situ hybridization the vam-1 gene was localized to 7p15-21, a chromosome region frequently disrupted in some human cancers. VAM-1 mRNA was abundant in human testis, brain, and kidney with lower levels detectable in other tissues. The primary structure of VAM-1, predicted from cDNA sequencing, consists of 540 amino acids including a single PDZ domain near the N-terminus, a central SH3 domain, and a C-terminal GUK (guanylate kinase-like) domain. Sequence alignment, heterologous transfection, GST pull-down experiments, and blot overlay assays revealed a conserved domain in VAM-1 that binds to Veli-1, the human homologue of the LIN-7 adaptor protein in Caenorhabditis. LIN-7 is known to play an essential role in the basolateral localization of the LET-23 tyrosine kinase receptor, by linking the receptor to LIN-2 and LIN-10 proteins. Our results therefore suggest that VAM-1 may function by promoting the assembly of a Veli-1 containing protein complex in neuronal as well as epithelial cells.
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Affiliation(s)
- T C Tseng
- Section of Hematology-Oncology Research, Department of Medicine, St. Elizabeth's Medical Center, Tufts University School of Medicine, 736 Cambridge Street, Boston, MA 02135, USA
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Abstract
Samples of maize imported into Taiwan during 1997-1998 were collected and analyzed for the presence of fumonisin B1 (FB1) using high performance liquid chromatography. Eight (6.8%) of 118 samples were found to contain FB1 (334-1614 microg kg(-1)). The frequency of FB1 found in maize samples imported from Australia was 20%, followed by Thailand (10%), and USA (5.1%). In analyzing the distribution pattern, it was found that 93.2% of the samples had FB1 concentrations below 100 microg kg(-1), and only 3.4% (or four samples) were in excess of 300 microg kg(-1).
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Affiliation(s)
- T C Tseng
- Institute of Botany, Academia Sinica, Nankang, Taipei, Taiwan.
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Hu HM, Chuang CK, Lee MJ, Tseng TC, Tang TK. Genomic organization, expression, and chromosome localization of a third aurora-related kinase gene, Aie1. DNA Cell Biol 2000; 19:679-88. [PMID: 11098217 DOI: 10.1089/10445490050199063] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
We previously reported two novel testis-specific serine/threonine kinases, Aie1 (mouse) and AIE2 (human), that share high amino acid identities with the kinase domains of fly aurora and yeast Ipl1. Here, we report the entire intron-exon organization of the Aie1 gene and analyze the expression patterns of Aie1 mRNA during testis development. The mouse Aie1 gene spans approximately 14 kb and contains seven exons. The sequences of the exon-intron boundaries of the Aie1 gene conform to the consensus sequences (GT/AG) of the splicing donor and acceptor sites of most eukaryotic genes. Comparative genomic sequencing revealed that the gene structure is highly conserved between mouse Aie1 and human AIE2. However, much less homology was found in the sequence outside the kinase-coding domains. The Aie1 locus was mapped to mouse chromosome 7A2-A3 by fluorescent in situ hybridization. Northern blot analysis indicates that Aie1 mRNA likely is expressed at a low level on day 14 and reaches its plateau on day 21 in the developing postnatal testis. RNA in situ hybridization indicated that the expression of the Aie1 transcript was restricted to meiotically active germ cells, with the highest levels detected in spermatocytes at the late pachytene stage. These findings suggest that Aie1 plays a role in spermatogenesis.
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Affiliation(s)
- H M Hu
- Institute of Life Science, National Defense Medical Center, Taipei, Taiwan, ROC and Institute of Biomedical Sciences, Academia Sinica, Taipei 115, Taiwan, ROC
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Abstract
The gymnotid electric fish, Eigenmannia virescens, exhibits electric discharge rhythmicity both in alternate light-dark (LD; 12 h light, 12 h dark [LD 12:12]) and in constant dark (DD) conditions. It suggests that the electric discharge rhythm is under control of the circadian clock. The free-running periods (FRPs) of electric discharge rhythms at 21 degrees C in DD are greater than, but close to, 24 h. The maximum of the electric discharge in the Eigenmannia system peaks approximately at circadian time 6 (CT6) in the middle of the subjective day. The circadian oscillator in the system is temperature compensated. This original report reveals the relationship between electric discharge activity and the circadian pacemaker in Eigenmannia and provides an alternative system to investigate circadian rhythms in vertebrates.
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Affiliation(s)
- T S Deng
- Institute of Botany, Academia Sinica, Nankang, Taipei, Taiwan, Republic of China
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Abstract
Samples of maize grown in various districts of Taiwan were collected and analyzed for the presence of fumonisin B(1) (FB(1)) and fumonisin B(2) (FB(2)) using high-performance liquid chromatography. Forty-nine (44.5%) and 2 (1.8%) of 110 samples were found to contain FB(1) (109-1148 ng/g) and FB(2) (222-255 ng/g), respectively. The frequency of detection and also the maximum FB(1) concentration were found in samples from Penton (2/2, 262 ng/g), followed by Chiayi (18/26, 264 ng/g), Tainan (8/16, 160 ng/g), Hualinen (5/14, 1148 ng/g), Taitung (7/20, 109 ng/g), and Yunlin (9/26, 361 ng/g). Of the 110 samples examined, only 2 samples from Hualinen had been detected containing FB(2). During an analysis of the distribution pattern of FB(1), it became apparent that >79% of tested samples had FB(1) concentrations <100 ng/g, whereas 2.7% (or 3 samples) contained FB(1) >300 ng/g. These results clearly illustrated that domestically produced maize for human consumption is frequently contaminated with FB(1).
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Affiliation(s)
- T C Tseng
- Institute of Botany, Academia Sinica, Nankang, Taipei, Taiwan, Republic of China
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Tseng TC, Chen SH, Hsu YP, Tang TK. Protein kinase profile of sperm and eggs: cloning and characterization of two novel testis-specific protein kinases (AIE1, AIE2) related to yeast and fly chromosome segregation regulators. DNA Cell Biol 1998; 17:823-33. [PMID: 9809744 DOI: 10.1089/dna.1998.17.823] [Citation(s) in RCA: 111] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
We have analyzed the general protein kinase expression profile in mouse sperm and eggs. A total of 41 different kinases were identified. In this study, we describe two novel protein kinases, designated AIE1 (mouse) and AIE2 (human), which share high amino acid identities with the serine/threonine (S/T) kinase domain of yeast Ip11, fly aurora, and frog Eg2. Mutations in Ip11 and aurora have been reported to cause abnormal chromosome segregation and centrosome separation. Both AIE1 and AIE2 contain a typical S/T kinase domain (251 aa) flanked by a short polypeptide at both ends. Two other AIE-related kinases (STK-1 and IAK1/Ayk1) were also identified in mature mouse oocytes. The central kinase domain of AIE1 revealed 77.6% and 66.3% identity with that of STK-1 and IAK1/Ayk1, but much less homology was found in the sequence outside the kinase domain. Northern blot analysis revealed that both AIE1 and AIE2 are specifically expressed in testis, whereas STK-1 and IAK1/Ayk1 are expressed in many tissues rich in proliferating cells. An in vitro kinase assay showed that AIE1 can phosphorylate casein, AIE1 itself, and an uncharacterized cellular protein (p16). The kinase activity of AIE1 can be destroyed by heat inactivation. In summary, we suggest that AIE is a new member of the S/T kinase family, which may be regulated in a fashion distinct from other AIE-related kinases.
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Affiliation(s)
- T C Tseng
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan, ROC
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Wang DJ, Tseng TC, Perng SY, Kuan CK, Chen JR, Chen CT. A compact mirror manipulator in the SRRC beamline. J Synchrotron Radiat 1998; 5:801-803. [PMID: 15263658 DOI: 10.1107/s0909049597019055] [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] [Received: 08/04/1997] [Accepted: 12/08/1997] [Indexed: 05/24/2023]
Abstract
A compact mirror manipulator which has high stiffness and is easily adjustable has been developed for new beamlines at SRRC. It consists of a vertical stem to support the mirror and allows for six-axis precise positioning. The rotation adjustment is designed with a minimum of cross-coupling between adjustments. An independent support is fixed to the ground to reduce vibration from the chamber and the pump. Some performance test results in vacuum and in atmosphere, including vibration, repeatability, long-term drift etc., are described in this paper.
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Affiliation(s)
- D J Wang
- Synchrotron Radiation Research Center, No.1 R&D Road VI, Hsinchu Science-Based Industrial Park, Hsinchu 30077, Taiwan
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Tseng TC, Tu JC. Mycoflora and mycotoxins in adzuki and mung beans produced in Ontario, Canada. Microbios 1997; 90:87-95. [PMID: 9345788] [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: 02/05/2023]
Abstract
This is the first report on the detection of fumonisin B1 (FB1) in Fusarium-infected adzuki bean (Phaseolus angularis) and mung bean (Phaseolus aureus). The infected beans had either a mouldy appearance or a distinct discoloration. Seed coats of infected adzuki beans changed from dark red to light red and those of mung beans from green to dark or brownish green. Fusarium spp. isolated from mouldy and discoloured beans included F. avenaceum, F. culmorum, F. equiseti, F. graminearum, F. moniliforme, F. oxysporum, F. solani, F. sporotrichoides and a few unidentified species. Healthy beans without any apparent discoloration and diseased beans with discoloration and mouldy appearance were analysed for mycotoxins. Diacetoxyscripenol, deoxynivalenol and T-2 toxin (T-2) were not detected in either healthy or discoloured adzuki and mung bean samples by thin layer chromatography (TLC). FB1 was detected by TLC in discoloured adzuki and mung bean samples but not in the healthy samples. TLC results were confirmed by high performance liquid chromatography (HPLC). The quantification of FB1 by HPLC revealed that discoloured adzuki and mung bean samples contained 261 +/- 43.8, and 230 +/- 21.6 micrograms g-1 of FB1, respectively. This investigation emphasizes the need for more detailed research in dealing with possible mycotoxin contamination in various foodstuffs including legumes.
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Affiliation(s)
- T C Tseng
- Institute of Botany, Academia Sinica, Taipei, Taiwan, Republic of China
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Wang CP, Tseng TC, Lee RC, Chang SY. The techniques of nonmuscular closure of hypopharyngeal defect following total laryngectomy: the assessment of complication and pharyngoesophageal segment. J Laryngol Otol 1997; 111:1060-3. [PMID: 9472577 DOI: 10.1017/s0022215100139337] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [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: 02/06/2023]
Abstract
The usual method of reconstructing a hypopharyngeal defect during total laryngectomy includes pharyngeal muscle layer closure, which may result in high pharyngoesophageal pressure. We hypothesize that nonclosure of the pharyngeal muscle can reduce the pressure of the pharyngoesophageal segment which can reduce the chances of the formation of pharyngocutaneous fistulae. A technique of nonmuscular closure of a hypopharyngeal defect is presented. The differences in the rate of fistula formation and swallowing function between patients with usual and nonmuscular closure were also studied. Sixty consecutive laryngectomees were enrolled in this study. Thirty patients received usual closure after total laryngectomy, whereas the other 30 patients underwent non closure of their pharyngeal muscles. One patient (3.3 per cent) in the nonmuscular closure group and three patients (10 per cent) in the usual closure group developed a pharyngocutaneous fistula. The pharyngoesophageal pressures of the nonmuscular closure group were significantly lower than those of the usual closure group. We conclude that the technique of nonclosure of the pharyngeal constrictor muscle after total laryngectomy is relatively more simple and is not associated with a higher rate of fistula formation. Furthermore, nonclosure of the pharyngeal constrictor muscle is preferable to muscular closure because it reduces the spasm of the pharyngoesophageal segment which limits voice rehabilitation.
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Affiliation(s)
- C P Wang
- Department of Otolaryngology, Veterans General Hospital, National Yang Ming University, Taipei, Taiwan
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Abstract
Corn-based human foodstuffs purchased in Taiwan were analyzed for fumonisin B1 (FB1) and fumonisin B2 (FB2) using high-performance liquid chromatography. Fifty-two (33.9%) and 32 (20.9%) of 153 samples were found to contain FB1 (73-2395 ng/g) and FB2 (120-715 ng/g), respectively. The highest frequency of detection and also the highest FB1 concentrations were found in sweetcorn (50%, 1089 ng/g) and cornflour (50%, 608 ng/g), followed by corn snacks (33.3%, 2395 ng/g), miscellaneous corn products (33.3%, 73 ng/g), popcorn (31.8%, 1003 ng/g) and cornflakes (23.5%, 1281 ng/g). 16 corn snacks (= approximately 20.5% of the samples) had an average FB1 and FB2 content of 456 and 145 ng/g, respectively, while six sweetcorn (= 25%) samples were contaminated with an average of 400 ng/g of FB1 and 65 ng/g of FB2. Of the 22 pop-corn samples examined, 7 had an average of 347 ng/g and 116 ng/g of FB1 and FB2, respectively. During an analysis of the distribution pattern for the combined fumonisin levels of FB1 and FB2, it became apparent that more than 69% of tested samples had fumonisin concentrations below 100 ng/g, while 11.1% (or 17 samples) contained in excess of 600 ng toxins per g. These results clearly illustrated that commercially available corn-based foodstuffs for human consumption in Taiwan are frequently contaminated with FB1 and FB2.
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Affiliation(s)
- T C Tseng
- Institute of Botany, Academia Sinica, Taipei, Taiwan, R.O.C
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Chou WH, Sou KL, Tsai JL, Nakamura A, Horng CB, Tseng TC. Differentiation of Salmonella typhi strains by ribosomal RNA gene restriction patterns. Southeast Asian J Trop Med Public Health 1995; 26:620-4. [PMID: 9139363] [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: 02/04/2023]
Abstract
Owing to the limited value of phage typing to determine the epidemiological association of Salmonella typhi (S. typhi) strains isolated from the source of typhoid fever, we analyzed ribosomal RNA (rRNA) gene restriction patterns to differentiate the independently isolated strains of identical phage type. The data showed that the restriction patterns of PstI was most polymorphic among four enzymes (BamHI, EcoRI, PstI, and SmaI) used, which revealed 13 types among 25 strains belonged to 4 phage types, 1 untypable and 2 not-determined strains. Total 25 strains of S. typhi were divided into 15 combination types by the rRNA restriction patterns with three enzymes (BamHI, PstI, and SmaI).
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Affiliation(s)
- W H Chou
- Division of Serology, National Institute of Preventive Medicine, Department of Health, Taipei City, Taiwan
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Abstract
In order to get more information about carbon metabolite regulation pathways, cloning and sequence analysis of sucrose-regulated genes from rice-suspension-cultured cells were performed. We used a new method, mRNA differential display, to screen differentially expressed genes under conditions of 3% and no sucrose in the cultured medium. Six candidate clones were identified and sequenced. Clones SI1 and SI2 were repressed by sucrose starvation, while clones SR1, SR2, SR3 and SR4 were induced by sucrose starvation. Nucleotide sequence analysis showed that clone SR2 has 94.8% homology to the salT gene, and clones SI1 and SR3 show 88.3 and 96.9% identity, respectively, to partial cDNA sequences in the GenBank database. The results suggest that mRNA differential display provides an easy and quick way to clone genes involved in the carbon metabolite regulation pathway.
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Affiliation(s)
- T C Tseng
- Institute of Life Science, National Tsing-Hua University, Hsinchu, Taiwan, ROC
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Abstract
Twenty-nine Fusarium species isolated from various sources in different districts of Taiwan were tested for their ability to produce fumonisins in corn cultures. Only Fusarium moniliforme produced fumonisin B1 (FB1) and fumonisin B2 (FB2). The finding that the other 28 Fusarium species produced neither FB1 nor FB2 is preliminary because only one strain per species was studied. The detection of FB1 and FB2 in cultures of F. moniliforme was demonstrated by TLC and HPLC, and FB1 was further confirmed by mass spectrometry. In a separate experiment, in which 38 strains of F. moniliforme were tested for fumonisins, approximately 66% (25/38) produced FB1 and/or FB2. Of the 25 strains, 14 produced only FB1 and 11 produced both FB1 and FB2, and the amounts of FB1 and FB2 produced by different strains varied greatly. This is the first report that fumonisins are found in corn cultures experimentally infected with F. moniliforme strains from Taiwan. It is safe to assume that fumonisin producing strains of F. moniliforme are widely distributed among the economic crops such as corn, rice, sugarcane, and sorghum throughout the Island.
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Affiliation(s)
- T C Tseng
- Institute of Botany, Academia Sinica, Nankang Taipei, Taiwan, ROC
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Tseng TC, Tu JC, Soo LC. Comparison of the profiles of seedborne fungi and the occurrence of aflatoxins in mould-damaged beans and soybeans. Microbios 1995; 84:105-16. [PMID: 8628121] [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: 02/01/2023]
Abstract
The average percentage of fungal infection in twenty bean and soybean lots was determined by visual inspection (24.5 and 16.8%, respectively), and by laboratory isolation (58.5 and 33.7%), respectively. The mycoflora were more diverse in bean than soybean. Bean was more susceptible to fungal infection than soybean under similar environmental and cultural conditions. The most frequently isolated fungal genera for bean and soybean were Aspergillus, Penicillium, Rhizopus, Eurotium and Curvularia. Aflatoxins were not detected in the non-infected beans and soybeans, but aflatoxins (B1, B2, G1 and G2) were detected in the infected beans but not in the infected soybeans. The absence of aflatoxin in the fungal infected soybeans is discussed.
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Affiliation(s)
- T C Tseng
- Institute of Botany, Academia Sinica, Nankang, Taipei, Taiwan, Republic of China
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Wang TK, Tseng TC, Lee JH, Wang WT, Tsai JL, Ho SI, Pan TM. [Analysis of Salmonella serovars in Taiwan by the phase induction method]. Zhonghua Min Guo Wei Sheng Wu Ji Mian Yi Xue Za Zhi 1994; 27:13-24. [PMID: 9747329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- T K Wang
- National Institute of Preventive Medicine, Department of Health, Taipei, Taiwan, R.O.C
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Chang KJ, Tseng TC. [Seroepidemiological investigation on Japanese encephalitis in Taiwan (January 1989-December 1991)]. Zhonghua Min Guo Wei Sheng Wu Ji Mian Yi Xue Za Zhi 1993; 26:25-37. [PMID: 8131659] [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: 01/29/2023]
Abstract
The hemagglutination inhibition (HI) test was used to detect sero-confirmed cases of clinically suspected Japanese encephalitis. The results revealed a total of 76 sero-confirmed cases; 24, 27 and 25 cases respectively for the year 1989, 1990 and 1991. The percentages of sero-confirmed cases with respect to reported cases were 12.97%, 12.33%, 10.04% respectively. The mean percentage was 11.64%. The mean number of sero-confirmed cases in recent three years was 25, and morbidity rate per 100,000 population was 0.125. The number of sero-confirmed cases in 1970 was 269, and morbidity rate per 100,000 was 1.86. The comparison of these two groups showed the ratio of 1:11 and 1:15. It demonstrated that the period of 50% sero-conversion of HI antibody positive pigs appeared two months earlier in the middle of May currently as against the middle of July during the years 1966-1968. The period of JE prevalence likewise shifted two months earlier to the months of May, June and July, with a peak in June in 1989-1991 as against the months of July, August and September with a peak in August in 1966-1968. There occurred a few sporadic cases in other months away from the period of major epidemic. With regard to the geographical distribution of the sero-confirmed cases in recent three years, most JE cases were detected in the Taipei basin and the Kaohsiung-Pingtung river basin. The next numerous cases were found in the terrace which extends from Taoyuan, Hsinchu and Miaoli to the central Taiwan and in the Chiayi-Tainan plain. Only four cases were reported from Ilan, Hualien and Taitung counties. During the years between 1955 and 1967, the vast majority of cases occurred among children, especially of 2-9 years of age. The next suffered group was the age group of 10-14 years. In the meanwhile, the current major group of victim was the age group of 10-14 years and its morbidity rate per 100,000 population was 0.30. The second suffered group was the age group of 20-24 years and its morbidity rate was 0.28, and the third was the age group of 0-9 years and its morbidity rate was 0.16. The percentages of sero-confirmed cases of the above each age group with respect to all sero-confirmed cases were 23.68%, 21.05%, 22.36% respectively.(ABSTRACT TRUNCATED AT 400 WORDS)
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Affiliation(s)
- K J Chang
- National Institute of Preventive Medicine, Department of Health, Taipei, Taiwan, R.O.C
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Saad Júnior R, Ethel Filho J, D'Andretta Neto C, Lee AD, Tseng TC, Barros SM. [Results of early thoracotomy in the treatment of non-calcified solitary pulmonary nodules. Analysis of 19 cases]. AMB Rev Assoc Med Bras 1989; 35:23-8. [PMID: 2602591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
We reviewed 19 patients who had undergone thoracotomy and resection of a noncalcified solitary pulmonary nodule over the past 7 years, to see if a policy of early thoracotomy was therapeutically valid. The average age of patients was 50 (range 10 to 73 years), 6 females and 13 males. All of them asymptomatic. In this study, there were 9 (47.3%) of primary bronchogenic carcinoma, the incidence was 54.5% in patients above 50 years. There were no postoperative deaths and 3 serious postoperative complications (15.7%). Post operatory followed up by all patients ranged from one to seven years. The patients with benign lesions are all well. 9 of the cases had primary lung cancer, 2 died, 3 1/2 years and 5 years after surgery. We conclude that pre-operative differential diagnostic procedure between benign and malign nodules may not always be decisive, and that an early thoracotomy in indicated every case, since the incidence of malign tumors is frequent. Very small primary lung cancers detected and treated early do not have the same poor prognosis as larger primary cancers.
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Chow L, Tseng TC. Detection of serum antibody to herpes simplex virus type I by enzyme-linked immunosorbent assay (ELISA). Zhonghua Min Guo Wei Sheng Wu Ji Mian Yi Xue Za Zhi 1981; 14:46-53. [PMID: 6266777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
For setting up an Enzyme-Linked Immunosorbent Assay (ELISA) to detect antibodies to herpes simplex virus type 1 (HSV-1), the virus was propagated in Vero cells and partially purified by sonification and ultracentrifugation on 30% sucrose solution. DEAE ion-exchange column chromatography was used for purification of goat anti-human IgG serum. The anti-human IgG immune serum and alkaline phosphatase were conjugated by glutaraldehyde method. ELISA test was performed by reacting HSV-1 antigen coated in polystyrene tubes with serum specimens and enzyme-IgG conjugates. The color produced by enzyme-substrate reaction was measured on a spectrophotometer. The results obtained by the ELISA had a good agreement with those obtained by a standard neutralization procedure on 119 serum specimens tested for antibody to HSV-1.
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Tseng TC, Wang SC. Locus of action of centrally acting muscle relaxants, diazepam and tybamate. J Pharmacol Exp Ther 1971; 178:350-60. [PMID: 5570459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
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Tseng TC, Bateman DF. A phosphatidase produced by Sclerotium rolfsii. Phytopathology 1969; 59:359-63. [PMID: 4305960] [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: 12/16/2023]
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Lee CY, Chang CC, Chiu TH, Chiu PJ, Tseng TC, Lee SY. Pharmacological properties of cardiotoxin isolated from Formosan cobra venom. Naunyn Schmiedebergs Arch Exp Pathol Pharmakol 1968; 259:360-74. [PMID: 4235412 DOI: 10.1007/bf00536909] [Citation(s) in RCA: 134] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Sawyer WH, Freer RJ, Tseng TC. Characterization of a principle resembling oxytocin in the pituitary of the holocephalian ratfish (Hydrolagus colliei) by partition chromatography on Sephadex columns. Gen Comp Endocrinol 1967; 9:31-7. [PMID: 6050515 DOI: 10.1016/0016-6480(67)90094-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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