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Wang SX, Chen BS, Zhang ZJ, Zhu SR, Wang XL, Liu GQ. Isolation, structural elucidation and biosynthetic pathway of bioactive prenyl quinone compounds from Panus lecomtei based on untargeted metabolomics combined with molecular networking. Food Chem 2025; 463:141275. [PMID: 39298853 DOI: 10.1016/j.foodchem.2024.141275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 09/09/2024] [Accepted: 09/11/2024] [Indexed: 09/22/2024]
Abstract
Panus lecomtei is a relatively unfamiliar and undeveloped mushroom. This study generated ethyl acetate extracts of P. lecomtei intracellular (I), extracellular (E) and total fermentation broth (T). Both E and T extracts demonstrated antioxidant and antibacterial activities at 100 to 200 μg/mL. The composition differences of metabolites of these extracts were further studied based on comparative metabolomics by LS/MS and molecular network analysis. The results revealed that there were over 2000 significantly distinct metabolites among the three extracts, with abundant prenyl quinone compounds. Furthermore, the molecular network clarified the conversion relationship of P. lecomtei metabolites. Seven known prenyl quinone derivatives (1-7) were isolated from the E extract. Among them, compound 3 displayed excellent antioxidant activity and modest antibacterial activity. Compound 5 was discovered in fungi for the first time. Finally, a potential biosynthetic route for prenyl quinone in P. lecomtei was suggested.
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Liu C, Du MX, Xie LS, Wang WZ, Chen BS, Yun CY, Sun XW, Luo X, Jiang Y, Wang K, Jiang MZ, Qiao SS, Sun M, Cui BJ, Huang HJ, Qu SP, Li CK, Wu D, Wang LS, Jiang C, Liu HW, Liu SJ. Gut commensal Christensenella minuta modulates host metabolism via acylated secondary bile acids. Nat Microbiol 2024; 9:434-450. [PMID: 38233647 DOI: 10.1038/s41564-023-01570-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Accepted: 11/29/2023] [Indexed: 01/19/2024]
Abstract
A strong correlation between gut microbes and host health has been observed in numerous gut metagenomic cohort studies. However, the underlying mechanisms governing host-microbe interactions in the gut remain largely unknown. Here we report that the gut commensal Christensenella minuta modulates host metabolism by generating a previously undescribed class of secondary bile acids with 3-O-acylation substitution that inhibit the intestinal farnesoid X receptor. Administration of C. minuta alleviated features of metabolic disease in high fat diet-induced obese mice associated with a significant increase in these acylated bile acids, which we refer to as 3-O-acyl-cholic acids. Specific knockout of intestinal farnesoid X receptor in mice counteracted the beneficial effects observed in their wild-type counterparts. Finally, we showed that 3-O-acyl-CAs were prevalent in healthy humans but significantly depleted in patients with type 2 diabetes. Our findings indicate a role for C. minuta and acylated bile acids in metabolic diseases.
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Wang SX, Zhao RL, Guo C, Chen BS, Dai HQ, Liu GQ, Liu HW. New meroterpenoid compounds from the culture of mushroom Panus lecomtei. Chin J Nat Med 2021; 18:268-272. [PMID: 32402403 DOI: 10.1016/s1875-5364(20)30033-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Indexed: 01/31/2023]
Abstract
Two new meroterpenoid compounds (1 and 2) together with five known meroterpenoid derivatives (3-7) were isolated from solid culture of mushroom Panus lecomtei. The structures of new compounds were confirmed by the analysis of NMR and HR-ESI-MS spectroscopic data. The biosynthetic pathway of 1-7 was postulated. All isolated compounds were evaluated for antibacterial activities against Staphylococcus aureus, Escherichia coli, Bacillus subtilis, Pseudomonas aeruginosa and Bacillus Calmette-Guérin. Compound 3 exhibited weak antibacterial activity against Bacillus Calmette-Guérin with the inhibition rate of 83.6% at 100 μmol·L-1. Other compounds showed no antibacterial activities against all tested pathogens at 100 μmol·L-1.
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He J, Chen BS, Zhou PH, Zhong YS, Chen WF, Zhang YQ, Li QL, Hu JW. [A novel and simplified closure method for defect closure after endoscopic full-thickness resection of gastric submucosal tumors: short-term outcomes of "Shao-Mai" closure method]. ZHONGHUA WEI CHANG WAI KE ZA ZHI = CHINESE JOURNAL OF GASTROINTESTINAL SURGERY 2020; 23:183-187. [PMID: 32074800 DOI: 10.3760/cma.j.issn.1671-0274.2020.02.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To evaluate the feasibility and short-term efficacy of a novel and simplified closure method developed by our team for the defect closure after endoscopic full-thickness resection (EFTR) for gastric submucosal tumors (SMT) in the gastric wall. Methods: A prospective single-arm clinical study was used. Inclusion criteria: (1) the lesion was located in the fundus or the greater curvature of the stomach, and was confirmed to originate from the muscularis propria layer; (2) the diameter of the tumor was ≤3.5 cm, and the tumor had no extensive adhesion to the peritoneal tissues and organs in extraperitoneal cavity; (3) the tumor had no malignant features under ultrasound endoscopy; (4) the patient agreed to participate in the study; (5) patients with severe complications were excluded. Based on the above criteria, 20 patients with gastric SMT at the Endoscopy Center of Zhongshan Hospital of Fudan University from January 2015 to March 2018 were enrolled in this study, including 5 males and 15 females with mean age of 61.1 (38 to 70) years. Grasping forceps-assisted endo-loop snare ligation device which is called "Shao-Mai" method was used to close the defect site. All the patients underwent EFTR and "Shao-Mai" method to perform defect closure. After successful tumor resection by EFTR, an endo-loop was anchored onto the edge of the gastric defect with grasping forceps assistance and closed tightly. The observation indicators included tumor size, en bloc resection, operation time, postoperative complications and hospital stay. The follow-up indicators included tumor residual, local recurrence, and metachronous lesions. Results: All the 20 lesions were located in the muscularis propria with a size of 0.5-3.5 (mean 1.4) cm. Three of them were located in the greater curvature of the mid-upper gastric body, 17 were located in the fundus. The endoscopic "Shao-Mai" closure was successfully performed after EFTR in all the 20 cases. Endoscope was used uniquely through the entire process, without laparoscopic assistance. The operative time was 20-100 (mean 43.8) minutes, while the "Shao-Mai" closure procedure took a range of 3-30 (mean 10.1) minutes. The en bloc resection rate was 100%. The pathological diagnosis included 17 gastrointestinal stromal tumors and 3 leiomyomas. No major complications occurred during or after surgery. All the patients were discharged 1-11 (mean 3.1) days after operation. The wounds of all the cases were healed completely six months after operation and only scar was observed without ulcer. No residual lesion, tumor recurrence or metastasis, leakage or fistula of digestive tract were found during the follow-up period of 15-54 (median 41) months. Conclusion: The endoscopic "Shao-Mai" closure method is a simplified novel way, which is feasible, effective, and safe for closing the gastric defect after EFTR.
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Han J, Lu F, Bao L, Wang H, Chen B, Li E, Wang Z, Xie L, Guo C, Xue Y, Ma Y, Liu H. Terphenyl derivatives and terpenoids from a wheat-born mold Aspergillus candidus. J Antibiot (Tokyo) 2019; 73:189-193. [PMID: 31827255 DOI: 10.1038/s41429-019-0266-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 11/30/2019] [Accepted: 12/02/2019] [Indexed: 02/06/2023]
Abstract
A new p-terphenyl derivative aspergicandidusin A (1), a new cleistanthane diterpenoid 6-deoxyaspergiloid C (13), and 12 known compounds (2-12, and 14) were isolated from the mold Aspergillus candidus. The structures of the new compounds were elucidated by spectral analysis of NMR and MS data. The absolute configuration of C-1 in 13 was determined via the circular dichroism data of the [Rh2(OCOCF3)4] complex. Compounds 2-8 and 11 showed moderate inhibitory activity against K562 cell lines with the IC50 value in the range from 17.9 to 46.3 μM. Compound 13 exhibited moderate cytotoxicity against HepG2 cells with the IC50 value of 47.7 μM. Compounds 11 and 12 exhibited moderate activity against the growth of S. aureus with MIC value of 6.25 μM, respectively.
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Peng JZ, Xue L, Chen J, Chen BS, Yang YQ. Influence of cyclophilin D protein expression level on endothelial cell oxidative damage resistance. GENETICS AND MOLECULAR RESEARCH 2015; 14:4258-68. [PMID: 25966197 DOI: 10.4238/2015.april.28.7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
We examined the influence of cyclophilin-D (CypD) protein expression level on endothelial cell oxidative damage resistance. A model of CypD protein expression or high expression in endothelial cells was established through gene silencing or cloning. The comparable groups were normal endothelial cells cultured in phosphate-buffered solution in liquid handling cells containing 500 mM H2O2 for 90 or 120 min, and then the medium was replaced with common nutrient solution and cultured again for 24 h. The apoptosis rate and nitric oxide (NO) levels of each group were tested. The cell apoptosis rate of the CyPD low expression group (32.51 ± 6.6 %) was significantly lower than that of the control group (52.57 ± 5.84%, P = 0.001), and total NO production was 24.06 ± 3 and 13.03 ± 3.55 μM. The apoptosis rate of the CyPD high expression group (24.24 + 3.08%) was significantly higher than that of the control group (7.7 + 0.68%, P < 0.001); total NO production was 3.55 ± 1.53 and 8.46 ± 0.77 μM, which was significantly different (P = 0.008). CypD protein could increase oxidative stress and cause endothelial cell injury and apoptosis.
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Phan CK, Wei JG, Liu F, Chen BS, Luo JT, Yang XH, Tan XF, Yang XB. First Report of Corynespora Leaf Spot of Eucalyptus in China. PLANT DISEASE 2015; 99:419. [PMID: 30699718 DOI: 10.1094/pdis-07-14-0697-pdn] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Eucalyptus is widely planted in the tropics and subtropics, and it has become an important cash crop in Southern China because of its fast-growing nature. In the Guangxi Province of southern China, Eucalyptus is produced on approximately 2 million ha, and two dominant asexual clones, Guanglin No. 9 (E. grandis × E. urophylla) and DH3229 (E. urophylla × E. grandis), are grown. Diseases are an increasing threat to Eucalyptus production in Guangxi since vast areas are monocultured with this plant. In June 2013, a leaf spot disease was observed in eight out of 14 regions in the province on a total of approximately 0.08 million ha of Eucalyptus. Initially, the lesions appeared as water-soaked dots on leaves, which then became circular or irregular shaped with central gray-brown necrotic lesions and dark red-brown margins. The size of leaf spots ranged between 1 and 3 mm in diameter. The main vein or small veins adjacent to the spots were dark. The lesions expanded rapidly during rainy days, producing reproductive structures. In severe cases, the spots coalesced and formed large irregular necrotic areas followed by defoliation. The causal fungus was isolated from diseased leaves. Briefly, the affected leaves were washed with running tap water, sterilized with 75% ethanol (30 s) and 0.1% mercuric dichloride (3 min), and then rinsed three times with sterilized water. Small segments (0.5 to 0.6 cm2) were cut from the leading edge of the lesions and plated on PDA. The plates were incubated at 25°C for 7 to 10 days. When mycelial growth and spores were observed, a single-spore culture was placed on PDA and grown in the dark at 25°C for 10 days. A pathogenicity test was done by spraying a conidial suspension (5 × 105 conidia ml-1) of isolated fungus onto 30 3-month-old leaves of Guanglin No. 9 seedlings. The plants were covered with plain plastic sheets for 7 days to keep the humidity high. Lesions similar to those observed in the forests were observed on the inoculated leaves 7 to 10 days after incubation. The same fungus was re-isolated. Leaves of control plants (sprayed with sterilized water) were disease free. Conidiophores of the fungus were straight to slightly curved, erect, unbranched, septate, and pale to light brown. Conidia were formed in chains or singly with 4 to 15 pseudosepta, which were oblong oval to cylindrical, subhyaline to pale olivaceous brown, straight to curved, 14.5 to 92.3 μm long, and 3.5 to 7.1 μm wide. The fungus was morphologically identified as Corynespora cassiicola (1). DNA of the isolate was extracted, and the internal transcribed spacer (ITS) region (which included ITS 1, 5.8S rDNA gene of rDNA, and ITS 2) was amplified with primers ITS5 and ITS4. 529 base pair (bp) of PCR product was obtained and sequenced. The sequence was compared by BLAST search to the GenBank database and showed 99% similarity to C. cassiicola (Accession No. JX087447). Our sequence was deposited into GenBank (KF669890). The biological characters of the fungus were tested. Its minimum and maximum growth temperatures on PDA were 7 and 37°C with an optimum range of 25 to 30°C. At 25°C in 100% humidity, 90% of conidia germinated after 20 h. The optimum pH for germination was 5 to 8, and the lethal temperature of conidia was 55°C. C. cassiicola has been reported causing leaf blight on Eucalyptus in India and Brazil (2,3) and causing leaf spot on Akebia trifoliate in Guangxi (4). This is the first report of this disease on Eucalyptus in China. References: (1) M. B. Ellis and P. Holliday. CMI Descriptions of Pathogenic Fungi and Bacteria, No. 303. Commonwealth Mycological Institute, Kew, Surrey, UK, 1971. (2) B. P. Reis, et al. New Dis. Rep. 29:7, 2014. (3) K. I. Wilson and L. R. Devi. Ind. Phytopathol. 19:393, 1966. (4) Y. F. Ye et al. Plant Dis. 97:1659, 2013.
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Meng JR, Liu PP, Zou CW, Wang ZQ, Liao YM, Cai JH, Qin BX, Chen BS. First Report of a Tospovirus in Mulberry. PLANT DISEASE 2013; 97:1001. [PMID: 30722525 DOI: 10.1094/pdis-08-12-0792-pdn] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Mulberry (Morus alba L.) is an economically important crop grown widely throughout Asia. Various virus-like symptoms including mosaics, vein banding, and chlorotic ringspots have been observed and reported on mulberry trees in China and Japan for decades. However, the etiology of mulberry viral diseases is generally understudied, although two mulberry-infecting viruses, Mulberry latent virus (genus Carlavirus) (2) and Mulberry ringspot virus (genus Nepovirus) (3), have been partially characterized. In a recent (2010 to 2011) field survey in Guangxi Province, China, supported by the local government, the incidence of virus-like diseases of mulberry ranged between 40 and 80%. To identify the viruses infecting mulberry, deep sequencing of small RNAs (4) was conducted using an Illumina Genome Analyzer. Small RNAs were isolated from five samples of mulberry leaves showing various virus-like symptoms and sequenced. Among the contigs assembled, a 445-bp contig (GenBank Accession No. JX268597) was found to share 76.6% nucleotide identity and 83.0% amino acid identity to Groundnut bud necrosis virus (genus Tospovirus, family Bunyaviridae; Accession Nos. U42555 and AAC55521). To obtain a longer cDNA fragment of this virus, a reverse transcription (RT)-PCR was done with primers MV-N-F (5'-AAGCCATCAATGTGCCTCCGGA-3') and MV-N-R (5'-AACACCATGTCTACCGTCCGTC-3') that align to the S-RNA sequence encompassing the nucleocapsid (N) gene and a portion of the intergenic region (IGR) of the Tospovirus. PCR products of about 1,000 bp were successfully amplified from the total RNA of the three mulberry samples (sl-1, xcsy-1, and xcsy-4) showing vein banding symptoms, but not from asymptomatic mulberry (jk-1). These PCR products were cloned and sequenced. The lengths of the amplicons were 1,027 bp (isolate sl-1, JX173786), 987 bp (isolate xcsy-1, JX173787), and 979 bp (isolate xcsy-4, JX173788) and the partial IGRs of the sl-1, xcsy-1, and xcsy-4 isolates were 187 bp, 147 bp, and 139 bp, respectively. The coding regions for the N protein were 831 bp and the deduced proteins of 277 amino acid residues were 100% identical for all three isolates. Since the N protein of this virus shared up to only 74.4% identity to other tospoviruses (74.4% to Capsicum chlorosis virus, ABB83818; and 71.5% to Watermelon bud necrosis virus, ABY79095), it may represent a new member of the Tospovirus genus, temporarily named Mulberry vein banding virus (MuVBV), according to the species demarcation criteria for the Bunyaviridae (1). To the best of our knowledge, this is the first report of a Tospovirus infecting M. alba. In an RT-PCR screening of 48 randomly selected mulberry samples suspected to be virus-infected, 32 were MuVBV-positive. Giving the high incidence and the high yield loss associated with Tospovirus and the presence of thrips, suspected vectors for the virus, MuVBV may represent a substantial threat to the silkworm industry in China. References: (1) M. Q. K. Andrew et al. Virus Taxonomy: 9th Report of the ICTV. Elsevier Academic Press, San Diego, 2012. (2) T. Tsuchizaki. Annu. Phytopath. Soc. Japan 42:304, 1976. (3) T. Tsuchizaki et al. Annu. Phytopath. Soc. Japan 37:266, 1971. (4) Q. Wu et al. PNAS. 107:1606, 2010.
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Zhang KY, Xing JC, Chen BS, Liu CX, Lau HW, Sim HG, Foo KT. Bipolar plasmakinetic transurethral resection of the prostate vs. transurethral enucleation and resection of the prostate: pre- and postoperative comparisons of parameters used in assessing benign prostatic enlargement. Singapore Med J 2011; 52:747-687514. [PMID: 22009396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
INTRODUCTION Transurethral enucleation and resection of the prostate (TUERP) may offer a better treatment for benign prostatic enlargement. We compared the perioperative parameters and outcome following bipolar plasmakinetic transurethral resection of the prostate (TURP) and TUERP. METHODS Data from two independent institutions were reviewed retrospectively. 50 and 45 consecutive patients were enrolled in the TURP and TUERP groups, respectively. Pre- and postoperative parameters, including prostatic specific antigen (PSA), prostate volume (PV), International Prostate Symptom Score (IPSS), quality of life (QOL) score, uroflowmetry and prostate volume (PV), were compared. RESULTS Age at surgery, preoperative PSA (5.8 +/- 4.0 versus 7.6 +/- 5.9 ng/ml) and PV (55.8 +/- 31.6 versus 53.2 +/- 26.8 g) showed no significant difference (p-value greater than 0.05). However, postoperative PSA (2.8 +/- 3.0 versus 0.8 +/- 0.4 ng/ml; p-value less than 0.05) and PV (15.2 +/- 7.7 versus 10.5 +/- 5.4 g; p-value less than 0.01) differed significantly between the TURP and TUERP groups, respectively. There were no significant differences in IPSS, QOL and Qmax between the two groups during follow-up (p-value is 0.62, 0.68 and 0.13, respectively). However, for the TUERP group, the postoperative post-void residual urine volume (PVR) was significantly better (13.8 +/- 19.5 versus 25.2 +/- 18.7 ml; p-value less than 0.01). CONCLUSION The TUERP technique achieved more complete resection than TURP, with a smaller post procedure PV and lower PSA and PVR after surgery. This may predict better long-term results for patients who had TUERP.
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Chen BS, Sun ZW, Hampsey M. A Gal4-sigma 54 hybrid protein that functions as a potent activator of RNA polymerase II transcription in yeast. J Biol Chem 2001; 276:23881-7. [PMID: 11313364 DOI: 10.1074/jbc.m102893200] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The bacterial final sigma(54) protein associates with core RNA polymerase to form a holoenzyme complex that renders cognate promoters enhancer-dependent. Although unusual in bacteria, enhancer-dependent transcription is the paradigm in eukaryotes. Here we report that a fragment of Escherichia coli final sigma(54) encompassing amino acid residues 29-177 functions as a potent transcriptional activator in yeast when fused to a Gal4 DNA binding domain. Activation by Gal4-final sigma(54) is TATA-dependent and requires the SAGA coactivator complex, suggesting that Gal4-final sigma(54) functions by a normal mechanism of transcriptional activation. Surprisingly, deletion of the AHC1 gene, which encodes a polypeptide unique to the ADA coactivator complex, stimulates Gal4-final sigma(54)-mediated activation and enhances the toxicity of Gal4-final sigma(54). Accordingly, the SAGA and ADA complexes, both of which include Gcn5 as their histone acetyltransferase subunit, exert opposite effects on transcriptional activation by Gal4-final sigma(54). Gal4-final sigma(54) activation and toxicity are also dependent upon specific final sigma(54) residues that are required for activator-responsive promoter melting by final sigma(54) in bacteria, implying that activation is a consequence of final sigma(54)-specific features rather than a structurally fortuitous polypeptide fragment. As such, Gal4-final sigma(54) represents a novel tool with the potential to provide insight into the mechanism by which natural activators function in eukaryotic cells.
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Lin CH, Chen BS, Yu CW, Chiang SW. A water-based triphenyltetrazolium chloride method for the evaluation of green plant tissue viability. PHYTOCHEMICAL ANALYSIS : PCA 2001; 12:211-213. [PMID: 11705029 DOI: 10.1002/pca.570] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A water-based 2,3,5-triphenyltetrazolium chloride (TTC) partitioning method using n-hexane for the evaluation of green plant tissue viability has been developed. Conventionally, the reduction of TTC to insoluble red-coloured triphenylformazan (TPF) has been used to detect seed, bud, leaf and cultured cell viability. However, the 95% ethanol used to extract TPF also extracts various pigments, such as chlorophyll, from plant tissues which interfere with the absorption of TPF at 485 nm. This new water-based method improves upon the current method by eliminating the interfering pigments in the hexane layer, and by minimising the non-enzymatic oxidation of the sample. When used to evaluate the tissue viability of chillstressed waxapple (Syzygium samarangense) plants, the refined method had a greater sensitivity than the electrolyte leakage method and thus provided a more precise assessment for the physiological state of various plant tissues.
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Chen TY, Tseng CC, Wang LK, Tsai TY, Chen BS, Chang CL. The clinical use of small-dose tetracaine spinal anesthesia for transurethral prostatectomy. Anesth Analg 2001; 92:1020-3. [PMID: 11273943 DOI: 10.1097/00000539-200104000-00040] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
UNLABELLED In a double-blinded study, we compared conventional dose tetracaine (8 mg), small-dose tetracaine (4 mg) with added fentanyl and epinephrine, and small-dose tetracaine (4 mg) with added fentanyl subarachnoid anesthesia. Forty-five patients scheduled for transurethral resection of prostate (TURP) under subarachnoid anesthesia were randomly assigned to Group 1 (8 mg hyperbaric tetracaine), Group 2 (4 mg hyperbaric tetracaine, 10 microg fen-tanyl, and 0.2 mg epinephrine), and Group 3 (4 mg hyperbaric tetracaine, 10 microg fentanyl, and 0.2 mL saline). Evaluations were performed after spinal anesthesia. Subarachnoid block was successful in all patients except one in Group 1, who required general anesthesia by mask. The median peak sensory levels 10 min after the induction of spinal anesthesia in Group 1 was T8, which was significantly higher than Group 2 and Group 3 (P < 0.05). The time of sensory and motor recovery in Group 3 was less than in Groups 1 and 2 (P < 0.05). Hypotension was observed in four patients in Group 1 and none in Groups 2 and 3. We conclude that small-dose 4-mg hyperbaric tetracaine plus 10 microg fentanyl might provide adequate anesthesia and fewer side effects for TURP when compared with the conventional (8 mg) dose. IMPLICATIONS Small-dose hyperbaric tetracaine (4 mg with 10 microg fentanyl added) may provide adequate anesthesia and fewer side effects for transurethral resection of the prostate.
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Abstract
Transglutaminase-3 (TGase-3) is an enzyme with the ability to catalyze the irreversible cross-linking of peptide-bound glutamine residues either with peptide-bound lysines or with primary amines. It has been implicated in the formation and assembly of the cornified cell envelope of the epidermis, hair follicle and perhaps other stratified squamous epithelia. We show here the involvement of TGase-3 in human esophageal cancer. In an initial study, mRNA differential display was performed with 3 pairs of esophageal cancer tissues and matched normal adjacent mucosa by a 10-mer arbitrary primer and mixed anchored primers (GT15N, N = A, C and G). Four differentially expressed cDNA bands were consistently observed in all 3 normal tissues but barely detected in their tumor counterparts. One of them was identified to be the 3; end of TGase-3. Northern blot and dot blot analyses of 14 samples confirmed the down-regulation of TGase-3 in malignant tissues compared with normal epithelia. RT-PCR revealed that TGase-3 expression was lost in 3 esophageal carcinoma cell lines and decreased in 35/38 tumors compared with adjacent normal mucosa. Taken together, 49/52 (94.2%) esophageal tumors presented down-regulation of the gene. Our data suggest that alteration of TGase-3 expression is a common event in the development of human esophageal cancer.
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Abstract
Transglutaminase-3 (TGase-3) is an enzyme with the ability to catalyze the irreversible cross-linking of peptide-bound glutamine residues either with peptide-bound lysines or with primary amines. It has been implicated in the formation and assembly of the cornified cell envelope of the epidermis, hair follicle and perhaps other stratified squamous epithelia. We show here the involvement of TGase-3 in human esophageal cancer. In an initial study, mRNA differential display was performed with 3 pairs of esophageal cancer tissues and matched normal adjacent mucosa by a 10-mer arbitrary primer and mixed anchored primers (GT15N, N = A, C and G). Four differentially expressed cDNA bands were consistently observed in all 3 normal tissues but barely detected in their tumor counterparts. One of them was identified to be the 3; end of TGase-3. Northern blot and dot blot analyses of 14 samples confirmed the down-regulation of TGase-3 in malignant tissues compared with normal epithelia. RT-PCR revealed that TGase-3 expression was lost in 3 esophageal carcinoma cell lines and decreased in 35/38 tumors compared with adjacent normal mucosa. Taken together, 49/52 (94.2%) esophageal tumors presented down-regulation of the gene. Our data suggest that alteration of TGase-3 expression is a common event in the development of human esophageal cancer.
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Chen BS, Wang MR, Cai Y, Xu X, Xu ZX, Han YL, Wu M. Decreased expression of SPRR3 in Chinese human oesophageal cancer. Carcinogenesis 2000; 21:2147-50. [PMID: 11133802 DOI: 10.1093/carcin/21.12.2147] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
cDNA fragments that were differentially expressed between human oesophageal carcinomas and matched normal adjacent mucosa were isolated using an improved mRNA differential display technique. One of them was identified as the 3'-untranslated region of SPRR3 and was homologous to the esophagin cDNA. Northern blot, dot blot and reverse transcription-polymerase chain reaction (RT-PCR) analyses revealed that SPRR3 expression was lost in three cell lines of oesophageal carcinoma and was dramatically decreased in 54 out of 57 primary oesophageal carcinomas compared with adjacent normal mucosa. Esophagin has been shown to be down-regulated in western oesophageal carcinomas. The data suggest that esophagin is probably the protein product of the gene SPRR3 and that altered mRNA expression of SPRR3/esophagin is a frequent event in the development of Chinese oesophageal cancer.
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Xu Z, Wang MR, Xu X, Cai Y, Han YL, Wu KM, Wang J, Chen BS, Wang XQ, Wu M. Novel human esophagus-specific gene c1orf10: cDNA cloning, gene structure, and frequent loss of expression in esophageal cancer. Genomics 2000; 69:322-30. [PMID: 11056050 DOI: 10.1006/geno.2000.6344] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
We have identified a novel human gene, designated C1orf10, using modified differential display PCR. The C1orf10 gene, which spans 5 kb in length, is composed of three exons. The deduced protein contains 495 amino acids with one transmembrane domain. The amino acid sequence of C1orf10 is characterized by the presence of a calcium-binding motif of about 90 amino acids at its N-terminal and a conserved consecutive repeat sequence of 60 amino acids that was identified previously only in bacterial ice nucleation proteins. In normal adult tissues, C1orf10 is highly expressed only in the esophagus and was undetectable in a total of 15 other tissues examined, suggesting its important role in esophageal cells. The expression of C1orf10 is either dramatically reduced or absent in esophageal cancer cell lines (3/3) as well as primary esophageal cancer tissues (35/37) compared with the corresponding normal esophageal mucosa. Using a radiation hybrid panel, C1orf10 was found to be located on chromosome 1q21. These findings suggest that expression of C1orf10 is unique to esophageal cells and that loss of its expression may play a role in the development of esophageal cancer.
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Tsai YC, Wang LK, Chen BS, Chen HP. Home-based patient-controlled epidural analgesia with bupivacaine for patients with intractable herpetic neuralgia. J Formos Med Assoc 2000; 99:659-62. [PMID: 10969513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023] Open
Abstract
This clinical report is based on retrospective observation of the outcome and effects of patient-controlled epidural analgesia (PCEA) with bupivacaine infusion administered at home to five patients with intractable herpetic neuralgia. All patients had severe pain (9 or 10 visual analogue scale [VAS]points) confined to the affected dermatomes, which was refractory to medication. The interval between zoster onset and PCEA application ranged from 27 to 60 days (mean, 37.2 d). The average daily amount of bupivacaine used was 36.5 to 91.2 mg (mean +/- standard deviation, 62.4 +/- 19.7 mg). The duration of PCEA therapy ranged from 10 to 28 days (18.4 +/- 7.6 d). One patient developed drug tolerance. All treatments resulted in effective and satisfactory pain relief (VAS, 0-3), with increase in physical activities to normal levels and easing of sleep and appetite impairment. No deleterious effects were found during PCEA therapy. After discontinuation of PCEA, two patients did not complain of pain but still had slight paresthesia, one of them required low-dose antidepressant for 17 days; three patients continued to have occasional sharp pain (VAS, 2-3) and required low-dose antidepressant and analgesic as-needed for one to six months. These results suggest that PCEA with bupivacaine infusion provides effective pain relief in patients with intractable herpetic neuralgia and is a feasible and effective home treatment modality with limited side effects.
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Wu WH, Pinto I, Chen BS, Hampsey M. Mutational analysis of yeast TFIIB. A functional relationship between Ssu72 and Sub1/Tsp1 defined by allele-specific interactions with TFIIB. Genetics 1999; 153:643-52. [PMID: 10511545 PMCID: PMC1460761 DOI: 10.1093/genetics/153.2.643] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
TFIIB is an essential component of the RNA polymerase II core transcriptional machinery. Previous studies have defined TFIIB domains required for interaction with other transcription factors and for basal transcription in vitro. In the study reported here we investigated the TFIIB structural requirements for transcription initiation in vivo. A library of sua7 mutations encoding altered forms of yeast TFIIB was generated by error-prone polymerase chain reaction and screened for conditional growth defects. Twenty-two single amino acid replacements in TFIIB were defined and characterized. These replacements are distributed throughout the protein and occur primarily at phylogenetically conserved positions. Most replacements have little or no effect on the steady-state protein levels, implying that each affects TFIIB function rather than synthesis or stability. In contrast to the initial sua7 mutants, all replacements, with one exception, have no effect on start site selection, indicating that specific TFIIB structural defects affect transcriptional accuracy. This collection of sua7 alleles, including the initial sua7 alleles, was used to investigate the allele specificity of interactions between ssu72 and sub1, both of which were initially identified as either suppressors (SUB1 2mu) or enhancers (sub1Delta, ssu72-1) of sua7 mutations. We show that the interactions of ssu72-1 and sub1Delta with sua7 are allele specific; that the allele specificities of ssu72 and sub1 overlap; and that each of the sua7 alleles that interacts with ssu72 and sub1 affects the accuracy of transcription start site selection. These results demonstrate functional interactions among TFIIB, Ssu72, and Sub1 and suggest that these interactions play a role in the mechanism of start site selection by RNA polymerase II.
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Huang HC, Bautista SL, Chen BS, Chang KP, Chen YJ, Wuu SW. Miller-Dieker syndrome with microdeletion of chromosome 17p13.3: report of one case. ZHONGHUA MINGUO XIAO ER KE YI XUE HUI ZA ZHI [JOURNAL]. ZHONGHUA MINGUO XIAO ER KE YI XUE HUI 1997; 38:472-6. [PMID: 9473821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Miller-Dieker syndrome (MDS) consists of lissencephaly, characteristic craniofacial appearance and sometimes other birth defects. Since 1983, it has been shown that most cases of MDS are caused by deletion of chromosome 17p13.3. Herein, we present a case of MDS in which the patient had characteristic craniofacial appearance in addition to lissencephaly. Although routine chromosome study showed a normal karyotype, deletion of chromosome 17p13.3 was suggested by high resolution GTG-banding and confirmed by FISH. About 36% of the cases reported by Dobyns had submicroscopic deletions of chromosome 17p13.3 in spite of normal karyotypes in routine chromosome studies. The high frequency of submicroscopic deletion in Dobyn's cases and our present case strongly suggests that chromosomal studies, including high-resolution banding and molecular genetic approaches such as FISH, are mandatory whenever MDS is suspected in cases of lissencephaly with normal karyotypes in routine chromosomal work-up.
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Jiang XZ, Chen BS, Zhao YF, Zhou AP, Zou YM, Gao H, Liu Y, Ji RM. [Clinical application study of intraoral high-level mandibular neurotomy: Reported of 19 cases]. SHANGHAI KOU QIANG YI XUE = SHANGHAI JOURNAL OF STOMATOLOGY 1997; 6:138-40. [PMID: 15160214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
Trigeminal neuralgia is a common disease in clinical practice. The recurrence rate after avulsion is relatively high. In order to reduce the recurrence rate, the author developed a new method and operated on 19 cases with intraoral high level trigeminal neurotomy based on 21 cases of adult human skull anatomy. The method is simple, safe and in good condition. The author emphasized that the proper management of the buccal branch during operation may have a close relation with the post-operative recurrence rate.
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Chen BS, Jiang XZ, Gao H, Liu Y. [Surgical approaches to tumors in the parapharyngeal and infratemporal space: Report of 18 cases]. SHANGHAI KOU QIANG YI XUE = SHANGHAI JOURNAL OF STOMATOLOGY 1996; 5:158-9. [PMID: 15160010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
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Zou AP, Chen BS, Jiang XZ, Liu HM. [Fibrous dysplasia and malignant transformation of the maxillofacial region: Analysis of 18 cases]. SHANGHAI KOU QIANG YI XUE = SHANGHAI JOURNAL OF STOMATOLOGY 1996; 5:138-9. [PMID: 15160003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
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Jiang XZ, Chen BS, Gao H, Zou AP. [Treatment of trigeminal neuralgia of the third branch by transecting the mandibular nerve at a higher position: Report of 8 cases]. SHANGHAI KOU QIANG YI XUE = SHANGHAI JOURNAL OF STOMATOLOGY 1996; 5:91-2. [PMID: 15160034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
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Tang RB, Chen BS, Chen SJ, Wu KG, Hwang B. Determination of the food specific IgE antibodies: comparison of MAST-CLA and CAP systems. ZHONGHUA YI XUE ZA ZHI = CHINESE MEDICAL JOURNAL; FREE CHINA ED 1996; 57:219-23. [PMID: 8935229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
BACKGROUND This study was carried out to compare two techniques used to determine the food specific IgE antibody. METHODS Thirty-four allergic patients were evaluated for most common food IgE antibodies by multiple allergosorbent chemiluminescent assay (MAST-CLA). IgE antibodies to eight of these food allergens were also measured by Pharmacia CAP (CAP) test. RESULTS The food specific IgE showed good agreement between MAST-CLA and CAP (kappa = 0.3-0.77). The sensitivity of MAST-CLA assay for food specific IgE antibody was variable comparing with that of CAP system. The accuracy ranged from 0.76 to 0.97. The agreement between the results of MAST-CLA and skin test was variable (kappa = 0.03-0.58). The agreement was poor in wheat, peanut and soybean (kappa = 0.03-0.12). Similar result between CAP and skin test was also obtained (kappa = 0.06-0.82). The agreement was poor in wheat (kappa = 0.06) and milk (kappa = 0.15). CONCLUSIONS Different results might be related to quality of the extract, how they are performed in vitro test and difference of correspondent allergens employed in the tests.
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Jiang XZ, Wang WC, Chen BS, Wang L. [Hamartoma of the head and neck: Clinicopathological analysis of 12cases]. SHANGHAI KOU QIANG YI XUE = SHANGHAI JOURNAL OF STOMATOLOGY 1995; 4:177-8. [PMID: 15160091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
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