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Cheng CS, Tan HY, Zhang C, Chan YT, Zhang ZJ, Man K, Yuen MF, Wang N, Feng Y. Berberine suppresses metastasis and recurrence of hepatocellular carcinoma by targeting circulating tumour cells: abridged secondary publication. Hong Kong Med J 2022; 28 Suppl 6:10-11. [PMID: 36535791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Affiliation(s)
- C S Cheng
- School of Chinese Medicine, The University of Hong Kong
| | - H Y Tan
- School of Chinese Medicine, The University of Hong Kong
| | - C Zhang
- School of Chinese Medicine, The University of Hong Kong
| | - Y T Chan
- School of Chinese Medicine, The University of Hong Kong
| | - Z J Zhang
- School of Chinese Medicine, The University of Hong Kong
| | - K Man
- Department of Surgery, The University of Hong Kong
| | - M F Yuen
- Department of Medicine, The University of Hong Kong
| | - N Wang
- School of Chinese Medicine, The University of Hong Kong
| | - Y Feng
- School of Chinese Medicine, The University of Hong Kong
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Tang JAWK, Leung BST, Lee DTF, Sung HT, Cheng CS. Multimodality Imaging Spectrum of Extranodal Lymphoma: A Pictorial Review. Hong Kong J Radiol 2019. [DOI: 10.12809/hkjr1916911] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Lee TF, Chu CY, Cheng CS, Khoo JLS. Incarcerated Right Diaphragmatic Hernia: a Rare Sequela of Open Radiofrequency Ablation for Hepatocellular Carcinoma. Hong Kong J Radiol 2015. [DOI: 10.12809/hkjr1514255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Cheng GYC, Ko JS, Wu JNY, Cheng CS, Chen CJH. Abstract P2-02-05: Combined Ultrasound/MRI for Breast Cancer Screening in Asian Women of Average Cancer Risk. Cancer Res 2010. [DOI: 10.1158/0008-5472.sabcs10-p2-02-05] [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: 11/16/2022]
Abstract
Abstract
Background and purpose: MRI is not recommended for screening women at average risk because it is associated with substantial numbers of false-positive results and cost. MRI as a screening tool for breast cancer, however, involves a complexity of cancer epidemiology, socio-economic situation, healthcare policy, and awareness and compliance of general population. Breast MRI may be particularly beneficial as a screening tool for Asian women due to their dense breast. In this study we reported the breast MRI screening results in Chinese women in Taiwan. Materials and Methods: In a period of 8 years, 3681 women underwent breast MRI examination in our imaging center. Of them, 95 women were known to have prior histories of cancers and were excluded from this study. The remaining breast MR images from 3,586 asymptomatic healthy women (mean age, 45.3 years) were retrospectively analyzed in this study. All subjects came to our imaging center for screening breast MR studies by self-referral due to high concern of cancer. All subjects were examined at a 1.5T scanner. The imaging interpretation was based on the criteria of ACR BI-RADS lexicon. After the breast MRI examination, complementary US was performed. If suspicious lesions were detected on MRI but showed negative results on US, double check with targeted US were done by the same radiologist immediately. US was also used to guide needle biopsy when in need.
Results: Overall, among 3,586 cases, totally 115 subjects were suspected to have malignant lesions and ultrasound-guided biopsy (N=106) and/or aspiration cytology study (N=122) was performed in all these 115 subjects. 47 were proved to have malignant lesions in pathology (35 invasive cancers — 27 IDC, 7 ILC, and one apocrine carcinoma; and 12 cases of carcinoma in situ). 31 additional cases of pre-cancerous lesions were found. The mean age in cancer group was 49 y/o and 52.2 y/o in CIS group. Subjects at age 41-50 group had the highest incidence of cancer detection, including 6 in situ lesions and 19 invasive cancers. Five cases were found to have breast cancers 1 or 2 years later. The incidence for malignancy in our asymptomatic group was about 1.31% (47/3586) and increased to 2.2% (78/3586) if precancerous lesions were included. The overall sensitivity of combined US/MRI was 94% and specificity was 99%. Conclusions: Breast MRI can be an option for Asian women of average risk, who usually have dense breast, at their own cost. From our results, it was shown that combined ultrasound and MRI can achieve high sensitivity and specificity for women of average risk. The unnecessary biopsy due to the false positive diagnosis of breast MRI can also be reduced remarkably.
Citation Information: Cancer Res 2010;70(24 Suppl):Abstract nr P2-02-05.
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Affiliation(s)
- GYC Cheng
- VGH-HT Imaging Center, Taipei, Taiwan; UC Irvine, CA; China Medical University Hospital, Taichung, Taiwan
| | - JS Ko
- VGH-HT Imaging Center, Taipei, Taiwan; UC Irvine, CA; China Medical University Hospital, Taichung, Taiwan
| | - JNY Wu
- VGH-HT Imaging Center, Taipei, Taiwan; UC Irvine, CA; China Medical University Hospital, Taichung, Taiwan
| | - CS Cheng
- VGH-HT Imaging Center, Taipei, Taiwan; UC Irvine, CA; China Medical University Hospital, Taichung, Taiwan
| | - CJH. Chen
- VGH-HT Imaging Center, Taipei, Taiwan; UC Irvine, CA; China Medical University Hospital, Taichung, Taiwan
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Wong EMF, Leung JLY, Cheng CS, Lee JCK, Li MKW, Chung CCC. Effect of endorectal coils on staging of rectal cancers by magnetic resonance imaging. Hong Kong Med J 2010; 16:421-426. [PMID: 21135417] [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: 05/30/2023] Open
Abstract
OBJECTIVE To compare the use of endorectal plus phased-array coils with use of phased-array coil alone with respect to the accuracy of magnetic resonance imaging for detecting mesorectal involvement of rectal cancer. DESIGN Retrospective study. SETTING A tertiary referral centre in Hong Kong. PATIENTS Ethnic Chinese patients with rectal adenocarcinoma who underwent staging magnetic resonance imaging during the years 2003 to 2008 in our centre were selected; those who received preoperative neoadjuvant therapy were excluded. Unless otherwise contra-indicated, endorectal coils have been used since 2006. MAIN OUTCOME MEASURES Magnetic resonance images were retrieved and reviewed by two radiologists blinded to the pathological results. The radiological findings were then correlated with the pathological reports to determine diagnostic accuracy. RESULTS A total of 50 patients were studied; 13 of the examinations were in patients having an endorectal coil. The overall accuracy of magnetic resonance imaging in detecting mesorectal tumour involvement was 80%. Subgroup analysis showed higher accuracy in the group with endorectal coils than in those with phased-array coils alone. Over-detection of mesorectal involvement was noted in 12% of the cases, with lower rate being observed in patients with endorectal coils. Underdetection of mesorectal tumour involvement was only noted in the group without endorectal coils. With the use of endorectal coils, the sensitivity reached 100% and the specificity increased to 86%. CONCLUSION Use of endorectal coil in staging magnetic resonance imaging of the rectum improves diagnostic accuracy. Whenever feasible, endorectal coil use is therefore recommendable to enhance diagnostic accuracy. The study results substantiate the understanding of staging by magnetic resonance imaging of rectal cancer in the local Chinese population.
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Affiliation(s)
- E M F Wong
- Department of Radiology, Pamela Youde Nethersole Eastern Hospital, Chai Wan, Hong Kong
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Lee JCK, Wong KP, Lo SSW, Cheng CS, Lau KY. Acute ectopic pancreatitis. Hong Kong Med J 2008; 14:501-502. [PMID: 19060354] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
Affiliation(s)
- J C K Lee
- Department of Radiology, Pamela Youde Nethersole Eastern Hospital, Chai Wan, Hong Kong.
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Ng FH, Wong WM, Wong BCY, Kng C, Wong SY, Lai KC, Cheng CS, Yuen WC, Lam SK, Lai CL. Sequential intravenous/oral antibiotic vs. continuous intravenous antibiotic in the treatment of pyogenic liver abscess. Aliment Pharmacol Ther 2002; 16:1083-90. [PMID: 12030949 DOI: 10.1046/j.1365-2036.2002.01266.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
AIM Pyogenic liver abscesses result in substantial morbidity and mortality. Antimicrobial regimens using sequential intravenous/oral therapy may reduce the length of hospital stay. In this retrospective analysis, the efficacy of continuous intravenous antibiotic therapy (group I) vs. sequential intravenous/oral antibiotic therapy (group II) was studied in patients with pyogenic liver abscess. METHODS One hundred and twelve consecutive patients (55 in group I and 57 in group II) with pyogenic liver abscess were analysed. Clinical response, length of hospital stay and relapse rates were examined. RESULTS Group II had a significantly shorter duration of intravenous antibiotic treatment (3.2 weeks vs. 5.9 weeks, P < 0.01) and a shorter length of hospital stay (28 days vs. 42 days, P < 0.01) when compared to group I. Oral antibiotics were prescribed for a median duration of 2.9 weeks in group II after discharge. No relapse occurred within 6 weeks after the completion of treatment in both groups. The cost of therapy was significantly lower in group II than in group I by 33%. CONCLUSIONS A sequential intravenous/oral antibiotic regime is a safe and effective treatment for pyogenic liver abscess. This reduces the cost of therapy and the length of hospital stay.
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Affiliation(s)
- F H Ng
- Department of Medicine, Ruttonjee Hospital, Hong Kong, ROC
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Katze JR, Gündüz U, Smith DL, Cheng CS, McCloskey JA. Evidence that the nucleic acid base queuine is incorporated intact into tRNA by animal cells. Biochemistry 2002; 23:1171-6. [PMID: 6561966 DOI: 10.1021/bi00301a022] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Queuine (the base of queuosine, Q) catalytically reduced with tritium or deuterium yields a derivative in which the proton at C-8 (purine numbering system) has been exchanged and the cyclopentene ring has been reduced to a cyclopentane ring. Mouse fibroblast tRNA has been labeled by culturing the cells in medium supplemented with [3H]- and [2H]dihydroqueuine. Such tRNA yields, upon hydrolysis, the nucleoside dihydroqueuosine and a saccharide derivative of dihydroqueuosine. Each product has been identified unambiguously by mass spectrometry and chromatography. Both the 3H- and 2H-labeled material coeluted, and no unlabeled Q nucleoside was found. Therefore, dihydroqueuine is incorporated intact into tRNA in mammalian cells. Furthermore, fractionation of the labeled tRNA on concanavalin A-agarose, which specifically binds the mannosyl-Q-containing tRNAAsp, has shown that the dihydroqueuosine-containing tRNAAsp is mannosylated. This is the first direct evidence that queuine is incorporated intact into mammalian tRNA in vivo.
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Cheng CS, Yen HT, Roan SW, Wu JF, Hsu JC. Effect of Dietary Protein and Lysine Levels on Lactating Multiparous Sows and Litter Performance. Asian Australas J Anim Sci 2001. [DOI: 10.5713/ajas.2001.77] [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] [Indexed: 11/27/2022]
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Abstract
BACKGROUND All patients with liver cirrhosis are recommended for evaluation of oesophagogastric varices (EGV) regularly. This prospective study was designed to develop a predictive model for EGV in cirrhotic patients. METHODS Ninety-two patients were recruited. From all patients studied, the size of palpable spleen, liver chemistry value, platelet count, prothrombin time, diameter of main portal vein and splenic length as assessed by ultrasonography were determined. Upper endoscopy was performed. Oesophageal varices (EV) and gastric varices (GV) were graded (EV, grade 1-4; GV, grade 1-3). In the predictive model, the EGV was classified into two grades (low, grade 1-2 EV or grade 1 GV; high, grade 3-4 EV or grade 2-3 GV). RESULTS There were 53 patients with EGV and 39 patients without EGV as determined by endoscopy. Patients with EGV had a significantly higher degree of ascites and hepatic encephalopathy, lower platelet count and longer splenic length than those without EGV. Low platelet count and presence of ascites were the significant independent predictors for high-grade EGV (concordance rate 0.83). The optimal critical value for the platelet count was 150 x 10(9)/L. Of patients without thrombocytopenia and ascites, 37% had low-grade EGV but none had high-grade EGV, whereas 38 and 35% of patients with thrombocytopenia or ascites had low and high-grade EGV, respectively. Therefore, this predictive model for high-grade varices had a positive and negative predictive value of 35 and 100%, respectively. CONCLUSION Endoscopic screening for EGV was not necessary until thrombocytopenia or ascites occurred.
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Affiliation(s)
- F H Ng
- Department of Medicine and Radiology, Ruttonjee Hospital, Hong Kong, China.
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Abstract
The diagnosis of hepatocellular carcinoma is generally made in patients with a mass lesion in the cirrhotic liver if the alpha-fetoprotein level is >1,000 ng/L. Other causes of elevation of alpha-fetoprotein to this extreme degree include nonseminomatous germ cell tumor and hepatic metastasis. However, it is extremely rare for benign hepatic lesions to cause alpha-fetoprotein of > 1,000 ng/ml. We report a Chinese patient with spontaneous normalization of alpha-fetoprotein with an initial value > 10,000 ng/ml due to nodular dysplasia complicating hepatitis C-related liver cirrhosis. The alpha-fetoprotein was secreted from the dysplastic liver cells.
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Affiliation(s)
- F H Ng
- Department of Medicine, Ruttonjee Hospital, Wan Chai, Hong Kong, China
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Abstract
Developing three dimensional finite element mesh models for irregular geometric objects requires a large amount of manual efforts, hence limiting the three dimensional approach for dental structure analyses. An automatic procedure which can be used to generate a three dimensional finite element mesh for the maxillary second premolar was developed in this study. Firstly, a embedded second premolar was sliced and scanned parallel to the occlusal surface. A self-developed image processing system was employed to detect the boundaries of different materials within each section. An automatic mesh generation program was used on these boundaries to create tetrahedral elements based on moving nodes of uniform cube approach. Six mesh models of the second premolar with different element sizes using linear and quadratic elements were analyzed. Strain energy and von Mises stresses were reviewed for convergence in the crown regions.
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Affiliation(s)
- C L Lin
- Institute of Biomedical Engineering, National Cheng Kung University, Tainan, Taiwan, ROC
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Abstract
Modified nucleotides are resource-intensive alternatives to the four nucleotides that constitute the bulk of natural RNAs. Yet, even in cases where modifications are highly conserved, their functions are difficult to identify. One possible function might be to modulate the stability of RNA structures. To investigate this possibility for N 2-methylguanosine (m2G), which is present in a wide variety of RNAs, we have determined the thermodynamic consequences of substituting m2G for G in G-C Watson-Crick pairs and G@U wobble pairs within RNA duplexes. The m2G substitution is iso-energetic with G in all cases, except for aninternal m2G@U pair, where it has a modest (0.3 kcal/mol) stabilizing effect. We have also examined theconsequences of replacing G by m2G, and A by N 6, N 6-dimethyladenosine (m26A) in the helix 45 tetraloop of 16S rRNA, which would otherwise be a standard GNRA tetraloop. This loop is a conserved, hypermethylated region of the ribosome where methylation appears to modulate activity. m26A substitution destabilizes the tetraloop, presumably because it prevents the formation of the G@A sheared pair it would otherwise contain. m2G substitution has no effect on tetraloop stability. Together, these results suggest that m2G is equally stable as either the s-cis or s-trans rotamer. The lack of a significant effect on secondary structural stability in these systems suggests that m2G is introduced into naturally occurring RNAs for reasons other than modulation of duplex stability.
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Affiliation(s)
- J P Rife
- Department of Chemistry and Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06520, USA
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Affiliation(s)
- C C Sun
- National Taiwan University Medical Center, Department of Dermatology and National Taiwan University College of Public Health, Taipei, ROC
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Chen CC, Cheng CS, Chang J, Huang HC. Differential correlation between translocation and down-regulation of conventional and new protein kinase C isozymes in C6 glioma cells. J Neurochem 1995; 64:818-24. [PMID: 7830075 DOI: 10.1046/j.1471-4159.1995.64020818.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [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: 01/27/2023]
Abstract
Correlation between translocation and down-regulation of conventional protein kinase C alpha (cPKC alpha) and new PKC delta (nPKC delta) induced by 12-O-tetradecanoylphorbol 13-acetate (TPA) at different time courses (5 min, 30 min, 1 h, 3 h, 6 h, 10 h, 17 h, and 24 h) was studied in C6 glioma cells. From the dose-dependent translocations of these two isoforms by 10-min treatment with TPA (1, 3, 10, 30, 100, 300, and 1,000 nM), we found that cPKC alpha was translocated by 3-1,000 nM and nPKC delta was translocated by 10-1,000 nM TPA. Both isoforms were maximally translocated by 100-1,000 nM TPA, whereas 1 nM did not translocate these two isoforms. When the cells were treated with 1,000 nM TPA for 5 min to 17 h, the translocation of these two isoforms occurred rapidly after 5-min treatment and could be sustained for 1 h, whereas down-regulation occurred after 3-h treatment and almost complete down-regulation was observed after 17-h treatment. However, the extent of down-regulation of nPKC delta was greater than that of cPKC alpha at 3-, 6-, and 10-h treatment. Further studies by using different doses of TPA (100, 10, 3, and 1 nM) and extending the time to 24 h showed that cPKC alpha was more resistant to down-regulation. This conventional isoform was maintained at a translocation state even after long-term treatment with 3-100 nM TPA, and complete down-regulation was only shown after 1,000 nM treatment.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- C C Chen
- Institute of Pharmacology, College of Medicine, National Taiwan University, Taipei
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Abstract
We report a case of abdominal actinomycosis demonstrated on computed tomography (CT) as an isolated mesenteric mass with radiating linear and nodular densities. The lesion mimicked a mesenteric tumor with desmoplastic reaction. The clinical and radiological features of this uncommon entity are reviewed.
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Affiliation(s)
- Y L Chan
- Department of Radiology, Hong Kong Baptist Hospital, Kowloon
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Cheng CS. [Analysis of 15 cases with necrotic perforation and large area necrotic leakage of the gastric wall after operation of esophageal and cardial cancer]. Zhonghua Zhong Liu Za Zhi 1993; 15:145-8. [PMID: 8223127] [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
From September 1964 to December 1971 and from January 1986 to December 1991, 15 cases were diagnosed as necrotic perforation and large area necrotic leakage of the gastric wall by iodipin roentgenography, barium meal examination and second operation. It is thought that the pathologic type of anastomotic leakage, the leakage of the anastomotic stoma region, and esophageal and gastric perforation caused by suture cuttings are virtually different from that of necrotic perforation and large area necrotic leakage of the gastric wall, and should be treated differently. The pathogenesis and clinical manifestation of the later two entities are discussed. In our opinion, the maintenance of good circulation of the right gastric and gastroepiploic arteries and veins, careful protection of the stomach wall, and avoiding great tension when the stomach is lifted are of vital importance to prevent the necrosis of gastric wall. In the case of necrotic perforation or large area necrotic leakage of the gastric wall, the early diagnosis is important and early operation is suggested.
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Affiliation(s)
- C S Cheng
- Linxian County People's Hospital, Linxian Henan
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Affiliation(s)
- C S Cheng
- People's Hospital of Linxian County, Henan Province, People's Republic of China
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Yip AW, Ng WS, Suen WS, Cheng CS. Type II Mirizzi syndrome: diagnosis by endoscopic retrograde cholangiopancreatography. J R Coll Surg Edinb 1992; 37:49-50. [PMID: 1573610] [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: 12/27/2022]
Affiliation(s)
- A W Yip
- Department of Surgery, Kwong Wah Hospital, Hong Kong
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Cheng CS, Jawan B, Lee JH. Assessment of atracurium during anesthesia and surgery. Ma Zui Xue Za Zhi 1990; 28:429-32. [PMID: 2097483] [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: 12/30/2022]
Abstract
Atracurium is a competitive neuromuscular blocking agent which goes through Hofmann elimination. It does not accumulate even after several bolus doses or infusion lasting several hours. The purpose of this study was to evaluate the effectiveness of atracurium on bolus injection for intubation and continuous infusion for subsequent surgery with the manufacturer's suggested dose. Forty-six patients (23-78 yr, ASA I-IV) undergoing laparotomy were included in the study. The patients were induced with Thropental and fentanyl, then a bolus of atracurium (0.5 mg/kg) was given and intubation done 90 sec later. Anesthesia was maintained with nitrous oxide, oxygen and isoflurane. Twenty minutes later atracurium 0.3 mg/kg/hr was infused continuously. The infusion continued until skin closure or an estimated 20-30 min before the end of the operation. Quality of muscle relaxation for intubation and surgery was evaluated by the surgeons and the anesthesiologists. Train-of-four (TOF) count was also recorded in the beginning and at the end of infusion. After extubation, residual curarization was evaluated clinically and with the TOF count method in the recovery room. Intubation quality was rated fair to poor in 67% of cases. Muscle relaxation assessed by the surgeons as excellent to good amounted to 96% of cases. All patients were extubated within 30 min after completion of surgery except for five patients who had poor postoperative conditions because of underlying diseases. No patient showed residual curarization or complication in the recovery room. With doses suggested by the manufacturer, our study indicated that intubation was not satisfactory while continuous infusion for muscle relaxation during surgery was acceptable.
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Affiliation(s)
- C S Cheng
- Department of Anesthesiology, Chang Gung Memorial Hospital, Taiwan, R.O.C
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Cheng CS. [Resection of esophageal and gastric cardiac cancer and esophagogastrostomy by planting esophagus into the stomach: a report of cases]. Zhonghua Wai Ke Za Zhi 1990; 28:261-2, 316. [PMID: 2086092] [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: 12/30/2022]
Abstract
105 cases of esophageal cancer and 46 cases of gastric cardia carcinoma were resected and the continuity of alimentary canal was resumed by planting esophagus into the stomach. This procedure had been designed by authors. There is neither anastomotic leakage nor stricture. Only 1 case died perioperatively. The anastomosis start by suturing the whole thickness of esophageal wall to the mucous membrane of stomach. Then the esophageal stump was telescoped into the stomach by suturing the secomuscular layer of stomach to the outer layer of esophageal muscles, with a distance of about 3 cm from the inner anastomatic line. When the anastomasis was finished, esophageal mucous membrane everted slightly, and prolapsed a little as food bolus passes. We suggest these are the mechanisms preventing the anastomosis from leaking or narrowing. Reflex of gastric content may be prevented too.
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Affiliation(s)
- C S Cheng
- Linxian County People's Hospital, Henan
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Wang CR, Liu MF, Hsieh RP, Chuang CY, Cheng CS. Evaluation of humoral immunity on leprosy patients in Taiwan: a preliminary report. Taiwan Yi Xue Hui Za Zhi 1989; 88:669-72. [PMID: 2681530] [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: 01/02/2023]
Abstract
Twenty-four tuberculoid (T)-type and 31 lepromatous (L)-type leprosy patients from Taiwan Provincial Lo-Sheng Leprosarium were enrolled in this study. Twenty-six age- and sex- matched normal subjects were also studied as a control group. The evaluation of their general and specific humoral immunity included B-cell subpopulations, 3 major classes of immunoglobulin (G, A and M) and antibodies in the IgG class against lepromin suspension and Bacillus Calmette-Guerin (BCG) sonicate. T-type patients showed a larger B-cell percentage than L-type patients (p less than 0.01). In general, patients with leprosy, both T and L types, had higher serum immunoglobulin levels than the control group. T-type patients showed greater antibody levels than the control group (p less than 0.05 for anti-lepromin and p less than 0.0001 for anti-BCG). L-type patients demonstrated a higher anti-BCG IgG level than the control group (p less than 0.0001). The level of anti-BCG IgG was more frequently above the cutoff level than that of anti-lepromin IgG in leprosy patients (p less than 0.01 for T, p less than 0.005 for L). In conclusion, humoral immunity is not impaired in leprosy patients. Discrepancies for T- and L-type patients among B-cell subpopulation, serum immunoglobulin levels and specific antibody levels reflect different aspects of cell-mediated immunity impairment. Though leprosy patients had elevated anti-BCG IgG levels, it is impossible to differentiate L- and T-type patients; specific antigens are needed for serodiagnosis of leprosy patients in Taiwan.
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Wang CR, Liu MF, Chen MY, Lin TP, Cheng CS, Chuang CY. Enzyme-linked immunosorbent assay with BCG sonicate antigen for diagnostic potential of mycobacterial infection in Taiwan. Zhonghua Min Guo Wei Sheng Wu Ji Mian Yi Xue Za Zhi 1989; 22:97-104. [PMID: 2691215] [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: 01/02/2023]
Abstract
The diagnostic potential of enzyme-linked immunosorbent assay (ELISA) with Bacillus Calmette-Guerin (BCG) sonicate antigen for detection of mycobacterial infections, including pulmonary tuberculosis and leprosy, has been evaluated in Taiwan area. One hundred blood samples were collected from 74 active and 26 inactive pulmonary tuberculosis patients of the Taiwan Provincial Tuberculosis Control Bureau. Another 50 samples were collected from 24 lepromatous, 23 tuberculoid and 3 borderline leprosy patients at the Taiwan Provincial Lo-Sheng Leprosarium. The IgG anti-BCG sonicate levels were compared among patients with tuberculosis, active or inactive, patients with leprosy, and healthy individuals. Patients with tuberculosis, both active and inactive, and those with leprosy had higher BCG sonicate antibody levels and frequencies above cutoff value than healthy subjects (for BCG-sonicate antibody, p less than 0.05 for inactive tuberculosis, p less than 0.0001 for others; for frequency above cutoff, p less than 0.001 for inactive tuberculosis, p less than 0.0001 for others). Among the three groups of patients, significant differences were noted in anti-BCG sonicate antibody level, and there was no difference of frequency above the cutoff value (i.e. inactive tuberculosis had lower level than active tuberculosis and leprosy, p less than 0.005). In conclusion, ELISA with BCG sonicate antigen could serve as a diagnostic aid for mycobacterial infection in Taiwan. However, it was not possible to differentiate disease activity in tuberculosis, or to discriminate infectious species of mycobacteria. Purified mycobacterial antigens should be tried in further research to improve the specificity and sensitivity in serodiagnosis with ELISA.
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Affiliation(s)
- C R Wang
- Department of Internal Medicine, National Taiwan University Hospital, ROC
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Lin SY, Lee TC, Cheng CS, Wang TC. Cytotoxicity, sister-chromatid exchange, chromosome aberration and transformation induced by 2,2-dichlorovinyl-O,O-dimethyl phosphate. Mutat Res 1988; 206:439-45. [PMID: 3205263 DOI: 10.1016/0165-1218(88)90051-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [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: 01/04/2023]
Abstract
2,2-Dichlorovinyl-O,O-dimethyl phosphate (DDVP), an extensively used household insecticide, was assayed for its genotoxicity in primary rat tracheal epithelial (RTE) cells. Cytotoxicity of DDVP to RTE cells was dose-dependent, killing about 50% of the cell population at a dose of 80 micrograms/ml. Sister-chromatid exchange (SCE) and chromosomal aberrations induced by this insecticide were positive in RTE cells although the doses needed for significant inductions were much higher than those by a known genotoxic agent, N-methyl-N'-nitro-N-nitrosoguanidine (MNNG). The level of transformation induced by DDVP in RTE cells was about 1/5 that induced by MNNG at a dose of similar cytotoxicity. The slope of the regression line for induced transformation is 1.27. DDVP probably induces the genotoxic effect in RTE cells by a one-hit mechanism.
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Affiliation(s)
- S Y Lin
- Institute of Zoology, Academia Sinica, Taipei, Republic of China
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Liu MF, Wang CR, Chen MY, Cheng CS. Evaluation of cell-mediated immunity on leprosy patients in Taiwan: a preliminary report. Taiwan Yi Xue Hui Za Zhi 1988; 87:622-5. [PMID: 3262712] [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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27
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Abstract
Axial computed tomography, as well as direct sagittal computed tomography in some cases, was used to evaluate five cases of sacrococcygeal tumors, and the findings are presented. Computed tomography greatly assisted in making a correct preoperative diagnosis and in delineating the extent of the tumors. Direct sagittal scans readily staged these tumors, whereas axial scans revealed extension in the transverse plane, especially for intraspinal extension.
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Chen HR, Heimburger RF, Lu CS, Cheng CS. [The stereotactic thalamotomy in parkinsonism]. Taiwan Yi Xue Hui Za Zhi 1985; 84:423-8. [PMID: 3894568] [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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29
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Swinton D, Hattman S, Crain PF, Cheng CS, Smith DL, McCloskey JA. Purification and characterization of the unusual deoxynucleoside, alpha-N-(9-beta-D-2'-deoxyribofuranosylpurin-6-yl)glycinamide, specified by the phage Mu modification function. Proc Natl Acad Sci U S A 1983; 80:7400-4. [PMID: 6369315 PMCID: PMC389958 DOI: 10.1073/pnas.80.24.7400] [Citation(s) in RCA: 57] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Bacteriophage Mu encodes a protein that modifies approximately equal to 15% of DNA adenine residues to a new and unusual form. Modified DNA was enzymatically digested to deoxynucleosides, and the products were fractionated by HPLC. A modified adenine nucleoside, designated dA'x, was purified and its molecular structure was established by mass spectrometry. We show that dA'x is alpha-N-(9-beta-D-2'-deoxyribofuranosylpurin-6-yl)-glycinamide. The dA'x obtained from DNA was indistinguishable from the synthetic product with respect to its chromatographic behavior (HPLC and gas chromatography) and mass spectrum. Acid hydrolysis degrades dA'x to produce N6-carboxymethyladenine; this compound corresponds to the base Ax observed in earlier studies.
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Bell J, Anderson S, Chan CW, Cheng CS. Methodology for a comparison of book jobber performance. Bull Med Libr Assoc 1982; 70:229-31. [PMID: 7066575 PMCID: PMC226689] [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: 01/23/2023]
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32
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Li PK, Cheng CS, Lau H. Direct reaction-rate determination of creatine kinase isoenzyme MB with a centrifugal analyzer, based on immunoinhibition. Clin Chem 1979. [DOI: 10.1093/clinchem/25.9.1671a] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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33
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Li PK, Cheng CS, Lau H. Direct reaction-rate determination of creatine kinase isoenzyme MB with a centrifugal analyzer, based on immunoinhibition. Clin Chem 1979; 25:1671-2. [PMID: 466802] [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: 12/15/2022]
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Abstract
Fischer's method for rapid detection of acute iron toxicity is modified to suit pediatric cases. TPTZ (2,4,6-tripyridyl-s-triazine) is the chromogen of choice since in a small volume of serum slight to moderate hemolysis can cause a false positive result bathophenanthroline. Ordinary labware is amenable to this simplified procedure.
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35
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Li PK, Humbert JR, Cheng CS. Evaluation of a commercially obtainable ferritin test kit in relation to the high-dose parabolic phenomenon. Clin Chem 1978. [DOI: 10.1093/clinchem/24.9.1650] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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36
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Li PK, Humbert JR, Cheng CS. Evaluation of a commercially obtainable ferritin test kit in relation to the high-dose parabolic phenomenon. Clin Chem 1978; 24:1650-1. [PMID: 688633] [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: 12/24/2022]
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37
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Cheng CS, Hinshaw BC, Panzica RP, Townsend LB. Synthesis of 2-amino-5-cyano-7-(beta-D-ribofuranosyl)-pyrrolo[2,3-d]pyrimidin-4-one. An important precursor for the synthesis of nucleoside Q and Q. J Am Chem Soc 1976; 98:7870-2. [PMID: 993507 DOI: 10.1021/ja00440a094] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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38
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Shull B, Cheng CS, Rahill WJ. Letter: Effect of hemolysis on values obtained for urea nitrogen in plasma. Clin Chem 1973; 19:1226. [PMID: 4741968] [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: 01/12/2023]
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39
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Cheng CS, Ling KH. Determination of mimosine in soybean sauce. Taiwan Yi Xue Hui Za Zhi 1969; 68:208-11. [PMID: 5262670] [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: 01/14/2023]
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Fu FY, T'ang MK, Cheng CS, Liu H, Lu ST. Medical management of ascites in hepatic cirrhosis. Chin Med J 1966; 85:302-7. [PMID: 5954121] [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: 01/17/2023]
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43
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Dale HE, Ragsdale AC, Cheng CS. Effect of Constant Environmental Temeratures, 50° and 80° F., on Appearance of Puberty in Beef Calves. J Anim Sci 1959. [DOI: 10.2527/jas1959.1841363x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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