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Li YP, Ding JF, Abid HM, Zhang XH, Li SC, Song QZ, Jiang LH, Zhang JT, Wang HB. Oral oligofructose challenge reduces expression of glucose transport-1 and 5'-adenosine monophosphate-activated protein kinase in lamellar wall of Holstein heifer claw. Res Vet Sci 2021; 141:42-47. [PMID: 34662833 DOI: 10.1016/j.rvsc.2021.10.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2019] [Revised: 09/15/2021] [Accepted: 10/05/2021] [Indexed: 11/28/2022]
Abstract
The laminar tissue of bovine laminitis may undergo energy failure. The expression of glucose transport protein-1 (GLUT-1) and 5'-adenosine monophosphate-activated protein kinase (AMPK) affects the energy metabolism of digital laminar tissue. This study aimed to determine the expression of glucose uptake and AMPK in laminar wall corium of Holstein heifer claw by oral administration of oligofructose. A total of twelve clinically healthy Holstein heifers were selected and divided into two groups, including control (CON, n = 6) and experimental (OF, n = 6) groups. The heifers of OF group were given 17 g/kg BW oligofructose dissolved in water (20 mL/kg BW) and the heifers of CON group were given water only (20 mL/kg BW). The laminar tissues were collected after euthanasia. The amount of protein and transcript expression of AMPK and GLUT-1 were determined by western blot and quantitative reverse transcription-polymerase chain reaction (qRT-PCR), respectively. Expressions of phosphoenolpyruvate carboxy-kinase (PEPCK), receptor-c coactivator1-α (PGC-1α) and peroxisome proliferator-activated receptor-γ (PPAR-γ) were determined by qRT-PCR. The heifers of OF group showed no significant change in the expression and concentration of AMPK. The phosphor-(Thr172) AMPK and GLUT-1 were significantly decreased, while the gene contents of PPAR-γ and PGC-1α were significantly increased. The activation of AMPK and GLUT-1 in digital laminar tissues of heifers was inhibited, which may contribute to digital laminar tissue damage.
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Affiliation(s)
- Y P Li
- Department of Veterinary Surgery, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China; Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Harbin 150030, PR China
| | - J F Ding
- Department of Veterinary Surgery, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China; Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Harbin 150030, PR China
| | - H M Abid
- Department of Veterinary Surgery, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China; Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Harbin 150030, PR China
| | - X H Zhang
- Department of Veterinary Surgery, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China; Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Harbin 150030, PR China
| | - S C Li
- Department of Veterinary Surgery, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China; Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Harbin 150030, PR China
| | - Q Z Song
- Department of Veterinary Surgery, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China; Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Harbin 150030, PR China
| | - L H Jiang
- Department of Veterinary Surgery, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China; Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Harbin 150030, PR China
| | - J T Zhang
- Department of Veterinary Surgery, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China; Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Harbin 150030, PR China
| | - H B Wang
- Department of Veterinary Surgery, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China; Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Harbin 150030, PR China.
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Xu JJ, Zhang LZ, Zhang QH, Guo HW, Tan Z, Wang JF, Jiang LH, Zheng CM, Ge MH, Lan XB. [Clinical application of the gasless unilateral axillary approach in endoscopic thyroid surgery]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2020; 55:913-920. [PMID: 33036505 DOI: 10.3760/cma.j.cn115330-20200225-00126] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the efficacy, safety and advantages of gasless unilateral axillary approach (GUAA) in endoscopic thyroid surgery. Methods: A total of 334 patients who underwent the GUAA endoscopic thyroid surgery (GUAA group) or conventional open thyroid surgery (OS group) in the Department of Head and Neck Surgery of Zhejiang Cancer Hospital from January 2017 to June 2018 were retrospectively analyzed. There were 45 males and 289 females, aged from 12 to 72 years old, of whom 139 patients were assigned to GUAA group and 195 patients to OS group. Pathological results included papillary thyroid carcinoma (282 cases), nodular goiter (41 cases) and thyroid adenoma (11 cases). Surgical exploration development curve of GUAA group was drawn and was divided into two parts: the technical exploration stage and the technical stable stage. Surgical efficiency, incidences of complications, and incision satisfaction were compared between GUAA group in technical stable stage and OS group. SPSS 25.0 software was adopted for statistical analysis. Results: The mean age in GUAA group was younger than that in OS group, with a significant difference [(35.3±9.5) years vs. (48.1±10.6) years, t=11.31, P<0.01]. The cases in the endoscope group were divided into technical exploration stage for 51 cases and technical stable stage for 88 cases according to the exploration and development curve. In unilateral radical thyroidectomy and unilateral thyroid lobectomy, the mean operation time [(90.6±18.6) min and (93.5±22.0) min] and postoperative drainage volumes [(121.5±87.6) ml and (155.5±69.1) ml] of GUAA group in the stable stage were more than those of OS group [(61.6±15.6) min and (46.5±8.4) min] and [(93.2±42.3) ml and (78.9±48.7) ml]. The difference was statistically significant (t=12.28, 7.23, 3.35 and 3.05 respectively, all P<0.05), but there were no significant differences in surgical bleeding volumes between two groups [(12.7±6.8) ml vs. (13.5±7.7) ml, t=0.74, P>0.05 and (16.3±14.1) ml vs. (11.9±5.1) ml, t=1.05, P>0.05]. Compared with OS group, GUAA group had the lower incidence of anterior cervical discomfort during swallowing (2.3% vs. 29.2%, P<0.01) and the higher incision satisfaction score (1.1±0.5 vs. 2.8±0.7, t=21.12, P<0.01), however, GUAA group had the higher incidence of supraclavicular (or infraclavicular) numbness after surgery (5.7% vs. 0, P<0.01). And there was no significant difference in the incidences of temporary recurrent laryngeal nerve injury, bleeding, hematoma, infection, lymphatic leakage or chylous leakage after surgery between two groups (P>0.05). Conclusion: GUAA endoscopic thyroid surgery is a safe method with high cosmetic satisfaction.
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Affiliation(s)
- J J Xu
- Department of Head and Neck Surgery, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou 310014, China
| | - L Z Zhang
- Second Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou 310053, China
| | - Q H Zhang
- Second Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou 310053, China
| | - H W Guo
- Department of Head and Neck Surgery, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou 310014, China
| | - Z Tan
- Department of Head and Neck Surgery, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou 310014, China
| | - J F Wang
- Department of Head and Neck Surgery, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou 310014, China
| | - L H Jiang
- Department of Head and Neck Surgery, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou 310014, China
| | - C M Zheng
- Department of Head and Neck Surgery, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou 310014, China
| | - M H Ge
- Department of Head and Neck Surgery, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou 310014, China
| | - X B Lan
- Department of Head and Neck Surgery, Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou 310022, China
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Zhai JB, Jiang LH, Jiang Y. SYNTHESIS, CRYSTAL STRUCTURE, AND ANTI-GASTRIC
CANCER ACTIVITY OF A Zn(II) COORDINATION
POLYMER WITH A 4,4′-BIS(1-IMIDAZOLYL)BIPHENYL LIGAND. J STRUCT CHEM+ 2020. [DOI: 10.1134/s0022476620070136] [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: 11/23/2022]
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4
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Wang AJ, Cui CK, Ye TT, Jiang LH, Chen XR, Zhang GW, Zou YF. [Voxel-based morphometry (VBM) MRI analysis of gray matter in patients with occupational noise-induced hearing loss]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2019; 36:677-681. [PMID: 30419671 DOI: 10.3760/cma.j.issn.1001-9391.2018.09.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the changes of brain gray matter volume in patients with occupational noise-induced hearing loss by voxel based morphometry (VBM) . Methods: 16 age-and education-matched healthy controls and 42 patients with occupational noise induced hearing loss, including 27 in mild group and 15 in severe group, received MRI 3D-FSPGR sequence T1WI sagittal scan, and then underwent VBM of brain gray matter volume data analysis. Results: The brain gray matter volume of the left occipitotemporal lateral gyrus, the anterior cingulate gyrus, the bilateral angular gyrus, the precuneus and the near midline area of cerebellum differed between experimental group and control group (P<0.01) . Conclusion: The volume of gray matter in specific brain areas of patients with occupational noise-induced hearing loss was changed, and the effect of noise on brain structure was revealed from the perspective of imaging.
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Affiliation(s)
- A J Wang
- Yantaishan Hospital, Yantai 264001, China
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Liu J, Jiang LH, Zhang CJ, Li P, Zhao TK. Nitrate-nitrogen contamination in groundwater: Spatiotemporal variation and driving factors under cropland in Shandong Province, China. ACTA ACUST UNITED AC 2017. [DOI: 10.1088/1755-1315/82/1/012059] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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6
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Wang JJ, Lai LM, Zhao XC, Jiang LH, Wang YJ, Zhou JH, Wang F, Zhang C, Zheng YR. Litter priming and trenching greatly affect soil respiration in a mature subtropical evergreen broadleaf forest in Southwestern China. CONTEMP PROBL ECOL+ 2015. [DOI: 10.1134/s1995425515040150] [Citation(s) in RCA: 2] [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: 11/23/2022]
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7
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Lv YW, Yang L, Zhang M, Jiang LH, Niu JH, Hou J, Cui XH. Increased human epididymis protein 4 in benign gynecological diseases complicated with chronic renal insufficiency patients. Genet Mol Res 2015; 14:2156-61. [PMID: 25867363 DOI: 10.4238/2015.march.27.2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
We examined the serum concentration of human epididymis protein (HE4) in patients with benign gynecological diseases complicated with chronic renal deficiency and its significance in the differential diagnosis of benign and malignant gynecological diseases. Serum HE4 and cancer antigen 125 concentrations were detected by chemiluminescence. Clinically or pathologically confirmed gynecological diseases were grouped and retrospectively analyzed, including 50 cases of gynecological benign diseases, 35 cases of non-mucinous epithelial ovarian carcinoma, 36 cases of endometrial adenocarcinoma, 15 cases of gynecological benign diseases patients complicated with chronic renal deficiency, 15 cases of gynecological diseases without chronic renal deficiency, and 30 normal controls. Serum HE4 values in the ovarian cancer group, endometrial cancer group, gynecological benign diseases with chronic renal deficiency group, and chronic renal deficiency group were significantly increased compared with the benign gynecological diseases and normal control groups, showing a significant difference (P < 0.001). A comparison of 4 groups with high HE4 showed that the HE4 level in the 2 groups with renal deficiency were higher than those in the ovarian cancer and endometrial cancer groups, but the difference was not significant (P > 0.05); there was no significant difference between 2 groups with renal deficiency (P > 0.05). Serum concentration of HE4 was high in patients with chronic renal deficiency, which should be distinguished during differential diagnosis of gynecological benign and malignant tumors in patients with chronic renal deficiency to avoid misdiagnosis.
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Affiliation(s)
- Y W Lv
- Department of Obstetrics and Gynecology, PLA 463rd Hospital, Shenyang, Liaoning Province, China
| | - L Yang
- Department of Obstetrics and Gynecology, PLA 463rd Hospital, Shenyang, Liaoning Province, China
| | - M Zhang
- Department of Obstetrics and Gynecology, PLA 463rd Hospital, Shenyang, Liaoning Province, China
| | - L H Jiang
- Department of Obstetrics and Gynecology, PLA 463rd Hospital, Shenyang, Liaoning Province, China
| | - J H Niu
- Department of Obstetrics and Gynecology, PLA 463rd Hospital, Shenyang, Liaoning Province, China
| | - J Hou
- Department of Obstetrics and Gynecology, PLA 463rd Hospital, Shenyang, Liaoning Province, China
| | - X H Cui
- Department of Obstetrics and Gynecology, PLA 463rd Hospital, Shenyang, Liaoning Province, China
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Wang T, Wei XY, Liu B, Wang LJ, Jiang LH. Effects of propofol on lipopolysaccharide-induced expression and release of HMGB1 in macrophages. ACTA ACUST UNITED AC 2015; 48:286-91. [PMID: 25714879 PMCID: PMC4418357 DOI: 10.1590/1414-431x20144222] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2014] [Accepted: 10/10/2014] [Indexed: 02/08/2023]
Abstract
This study aimed to determine the effects of different concentrations of propofol
(2,6-diisopropylphenol) on lipopolysaccharide (LPS)-induced expression and release of
high-mobility group box 1 protein (HMGB1) in mouse macrophages. Mouse macrophage cell
line RAW264.7 cells were randomly divided into 5 treatment groups. Expression levels
of HMGB1 mRNA were detected using RT-PCR, and cell culture
supernatant HMGB1 protein levels were detected using enzyme-linked immunosorbent
assay (ELISA). Translocation of HMGB1 from the nucleus to the cytoplasm in
macrophages was observed by Western blotting and activity of nuclear factor
kappa-light-chain-enhancer of activated B cells (NF-κB) in the nucleus was detected
using ELISA. HMGB1 mRNA expression levels increased significantly in
the cell culture supernatant and in cells after 24 h of stimulating RAW264.7 cells
with LPS (500 ng/mL). However, HMGB1 mRNA expression levels in the
P2 and P3 groups, which received 500 ng/mL LPS with 25 or 50 μmol/mL propofol,
respectively, were significantly lower than those in the group receiving LPS
stimulation (P<0.05). After stimulation by LPS, HMGB1 protein levels were reduced
significantly in the nucleus but were increased in the cytoplasm (P<0.05).
Simultaneously, the activity of NF-κB was enhanced significantly (P<0.05). After
propofol intervention, HMGB1 translocation from the nucleus to the cytoplasm and
NF-κB activity were inhibited significantly (each P<0.05). Thus, propofol can
inhibit the LPS-induced expression and release of HMGB1 by inhibiting HMGB1
translocation and NF-κB activity in RAW264.7 cells, suggesting propofol may be
protective in patients with sepsis.
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Affiliation(s)
- T Wang
- Department of Anesthesiology, the Third Affiliated Hospital, Zhengzhou University, Zhengzhou, China
| | - X Y Wei
- Department of Anesthesiology, the Third Affiliated Hospital, Zhengzhou University, Zhengzhou, China
| | - B Liu
- Department of Anesthesiology, the Third Affiliated Hospital, Zhengzhou University, Zhengzhou, China
| | - L J Wang
- Department of Anesthesiology, the Third Affiliated Hospital, Zhengzhou University, Zhengzhou, China
| | - L H Jiang
- Department of Anesthesiology, the Third Affiliated Hospital, Zhengzhou University, Zhengzhou, China
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9
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Wei Y, Liu GL, Yang JY, Zheng RX, Jiang LH, Li YP, Gao FF. Association between metabolic syndrome and vascular endothelium dysfunction in children and adolescents. Genet Mol Res 2014; 13:8671-8. [PMID: 25366757 DOI: 10.4238/2014.october.27.7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
We aimed at investigating the association between metabolic syndrome (MS) and vascular endothelial cell dysfunction (ECD) in children and adolescents. Sixty children (30 obese children and 30 children with MS) were included in this retrospective analysis. Thirty healthy subjects were randomly selected as the control group. A series of indices/biomarkers known to be related to MS/ECD were determined using ELISA. Correlations between the variables measured were analyzed. Compared with the control group, PAI-1, vWF, VE-cad, TM, and VEGF were significantly increased in the MS group (P < 0.05). Adolescents in the obese group had significantly increased levels of serum PAI-1, VE-cad, TM, and VEGF as compared with the control group (P < 0.05). Further, vWF in the obese and control groups did not differ significantly (P = 0.556). Our results suggest that ECD is correlated with MS in children and adolescents. Pathophysiological changes of the vascular endothelium may exist in obese children who have yet to develope MS. PAI-1, vWF, VE-cad, TM, and VEGF could be used as biomarkers for predicting ECD. ECD that develops in patients with MS may be associated with obesity, elevated blood lipid, elevated blood glucose, and higher blood pressure.
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Affiliation(s)
- Y Wei
- Department of Pediatrics, General Hospital of Tianjin Medical University, Tianjin, China
| | - G L Liu
- Department of Pediatrics, General Hospital of Tianjin Medical University, Tianjin, China
| | - J Y Yang
- Department of Pediatrics, General Hospital of Tianjin Medical University, Tianjin, China
| | - R X Zheng
- Department of Pediatrics, General Hospital of Tianjin Medical University, Tianjin, China
| | - L H Jiang
- Department of Pediatrics, General Hospital of Tianjin Medical University, Tianjin, China
| | - Y P Li
- Department of Pediatrics, General Hospital of Tianjin Medical University, Tianjin, China
| | - F F Gao
- Department of Pediatrics, General Hospital of Tianjin Medical University, Tianjin, China
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10
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Jiang LH, Zhang YL, Gong XM, Pang R, Zhang S, Li CY, Su Q. LiSr4(BO3)3:Ce3+ phosphor as a new material for ESR dosimetry. Appl Radiat Isot 2013; 84:66-9. [PMID: 24321766 DOI: 10.1016/j.apradiso.2013.11.029] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2013] [Revised: 09/09/2013] [Accepted: 10/31/2013] [Indexed: 11/28/2022]
Abstract
LiSr4(BO3)3:0.01Ce(3+) phosphor was investigated to assess its potential as a material for measurements of radiotherapeutic doses with electron spin resonance (ESR). The ESR spectrum of the phosphor irradiated with (60)Co features five ESR signals. An isochronal annealing experiment has shown that the strongest of these signals is associated with the same trap center as the 473 K peak on the TL glow curve of this material. The dose-response is linear in the studied range from 0.89 to 90.30 Gy. Fading of the signal was also investigated.
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Affiliation(s)
- L H Jiang
- State Key Laboratory of Application of Rare Earth Resources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Y L Zhang
- Ionizing Radiation Division, National Institute of Metrology, Beijing 110000, China
| | - X M Gong
- Ionizing Radiation Division, National Institute of Metrology, Beijing 110000, China
| | - R Pang
- State Key Laboratory of Application of Rare Earth Resources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - S Zhang
- State Key Laboratory of Application of Rare Earth Resources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - C Y Li
- State Key Laboratory of Application of Rare Earth Resources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
| | - Q Su
- State Key Laboratory of Application of Rare Earth Resources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China; State Key Laboratory of Optoelectronic Materials and Technology, School of Chemistry and Chemical Engineering Department, Sun Yat-sen University, Guangzhou 510275, China
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11
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Peng KS, Ruan LS, Tu J, Qi KZ, Jiang LH. Tissue distribution, expression, and antimicrobial activity of Anas platyrhynchos avian β-defensin 6. Poult Sci 2013; 92:97-104. [PMID: 23243235 DOI: 10.3382/ps.2012-02562] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
In this study, a novel avian β-defensin (AvBD) was isolated from the Chaohu duck. The complete nucleotide sequence of the gene contained a 204-bp open reading frame that encoded 67 amino acids (aa), including a signal peptide of 20 aa, a propiece of 5 aa, and a mature peptide of 42 aa. The homology, characterization, and comparison of this gene with AvBD from other avian species confirmed that it was duck AvBD6. Also, the preproprotein of AvBD6 from chicken, goose, and duck was highly conserved with 100% aa homology. The AvBD6 mRNA was widely expressed in the investigated tissues of healthy 5-mo-old ducks, with the exception of the skin, kidney, and bursa. The AvBD6 mRNA was highly expressed in the spleen, lung, stomach, tongue, and egg yolk, successively; moderately expressed in the bone marrow and liver; and expressed to lower degrees in the trachea, heart, intestine, muscle, esophagus, and testis. We produced recombinant AvBD6 by expressing the gene in Escherichia coli. The yield of soluble glutathione S-transferees (GST)-AvBD6 in the inclusion bodies increased significantly as the incubation temperature was decreased from 37 to 30°C. As expected, the GST-AvBD6 exhibited strong bactericidal properties [minimum inhibitory concentration (MIC) = 0.5 to 2 μM] against the Aeromonas veronii biovar sobria strain BJCP-5, E. coli, and Enterococcus faecalis [ATCC 29212); it possessed medium bactericidal properties (MIC = 4 to 8 μM) against Staphylococcus aureus, Salmonella enteritidis, Pseudomonas aeruginosa (ATCC 27853), and Bacillus subtilis (CMCC 63501;; and it possessed low bactericidal properties (MIC = 16 μM) against Candida albicans (ATCC 10231). Additionally, the antimicrobial activity of GST-AvBD6 proved to be the same as that of synthetic AvBD6. The A. veronii biovar sobria strain BJCP-5 cells that were treated with GST-AvBD6 showed lysis and shrinkage under scanning electron microscopy. The mechanisms of AvBD6-mediated killing of A. veronii biovar sobria involved both cell lysis and nonlysis. Our results indicate that AvBD6 plays an important role in the innate immunity of the Chaohu duck.
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Affiliation(s)
- K S Peng
- College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036, P. R. China
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12
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Jiang LH, Gamper N, Beech DJ. Properties and therapeutic potential of transient receptor potential channels with putative roles in adversity: focus on TRPC5, TRPM2 and TRPA1. Curr Drug Targets 2011; 12:724-36. [PMID: 21291387 PMCID: PMC3267159 DOI: 10.2174/138945011795378568] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2010] [Accepted: 06/28/2010] [Indexed: 01/13/2023]
Abstract
Mammals contain 28 genes encoding Transient Receptor Potential (TRP) proteins. The proteins assemble into cationic channels, often with calcium permeability. Important roles in physiology and disease have emerged and so there is interest in whether the channels might be suitable therapeutic drug targets. Here we review selected members of three subfamilies of mammalian TRP channel (TRPC5, TRPM2 and TRPA1) that show relevance to sensing of adversity by cells and biological systems. Summarized are the cellular and tissue distributions, general properties, endogenous modulators, protein partners, cellular and tissue functions, therapeutic potential, and pharmacology. TRPC5 is stimulated by receptor agonists and other factors that include lipids and metal ions; it heteromultimerises with other TRPC proteins and is involved in cell movement and anxiety control. TRPM2 is activated by hydrogen peroxide; it is implicated in stress-related inflammatory, vascular and neurodegenerative conditions. TRPA1 is stimulated by a wide range of irritants including mustard oil and nicotine but also, controversially, noxious cold and mechanical pressure; it is implicated in pain and inflammatory responses, including in the airways. The channels have in common that they show polymodal stimulation, have activities that are enhanced by redox factors, are permeable to calcium, and are facilitated by elevations of intracellular calcium. Developing inhibitors of the channels could lead to new agents for a variety of conditions: for example, suppressing unwanted tissue remodeling, inflammation, pain and anxiety, and addressing problems relating to asthma and stroke.
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Affiliation(s)
- L H Jiang
- Institute of Membrane & Systems Biology, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, UK
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13
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Li DB, Wei X, Jiang LH, Wang Y, Xu F. Meta-analysis of epidemiological studies of association of P53 codon 72 polymorphism with bladder cancer. Genet Mol Res 2010; 9:1599-605. [PMID: 20730711 DOI: 10.4238/vol9-3gmr882] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Although there have been many studies investigating a possible association between p53 codon 72 polymorphism and risk of bladder cancer, the results have been inconsistent. We conducted a meta-analysis of six epidemiological studies, which included 597 bladder cancer cases and 731 controls. Patients with bladder cancer had a significantly lower frequency of Pro/Arg [odds ratio (OR) = 0.80, 95% confidence interval (CI) = 0.64-0.99], when compared to controls. Stratifying for race, we found that among Caucasians, patients with bladder cancer had a significantly higher frequency of Arg/Arg (OR = 1.64, 95%CI = 1.18-2.28) and a lower frequency of Pro/Arg (OR = 0.62, 95%CI = 0.44-0.86), compared to controls. Stratifying various studies by the stage of bladder cancer, we found that invasive bladder cancers had a significantly lower frequency of Arg/Arg (OR = 0.58, 95%CI = 0.36-0.93) and a higher frequency of Pro/Arg (OR = 0.62, 95%CI = 0.44-0.86) than did non-invasive bladder cancers. No significant association was found between this genotype and human papilloma virus. Based on our meta-analysis, we suggest that p53 codon 72 polymorphism is associated with bladder cancer and that genotypic distribution of this polymorphism varies with the stage of bladder cancer.
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Affiliation(s)
- D B Li
- Department of Urology, First Affiliated Hospital of Zunyi Medical College, Zunyi, Guizhou, China.
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Wang Q, Sun GQ, Jiang LH, Xin Q, Sun SG, Jiang YX, Chen SP, Jusys Z, Behm RJ. Adsorption and oxidation of ethanol on colloid-based Pt/C, PtRu/C and Pt3Sn/C catalysts: In situ FTIR spectroscopy and on-line DEMS studies. Phys Chem Chem Phys 2007; 9:2686-96. [PMID: 17627312 DOI: 10.1039/b700676b] [Citation(s) in RCA: 143] [Impact Index Per Article: 8.4] [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: 11/21/2022]
Abstract
The interaction of colloid-based, carbon supported Pt/C (40 wt%), PtRu/C (45 wt%) and Pt3Sn/C (24 wt%) catalysts with ethanol and their performance for ethanol electrooxidation were investigated in model studies by electrochemical, in situ infrared spectroscopy and on-line differential electrochemical mass spectrometry measurements. The combined application of in situ spectroscopic techniques on realistic catalysts and under realistic reaction (DEMS, IR) and transport conditions (DEMS) yields new insight on mechanistic details of the reaction on these catalysts under the above reaction and transport conditions. Based on these results, the addition of Sn or Ru, though beneficial for the overall activity for ethanol oxidation, does not enhance the activity for C-C bond breaking. Dissociative adsorption of ethanol to form CO2 is more facile on the Pt/C catalyst than on PtRu/C and Pt3Sn/C catalysts within the potential range of technical interests (<0.6 V), but Pt/C is rapidly blocked by an inhibiting CO adlayer. In all cases acetaldehyde and acetic acid are dominant products, CO2 formation contributes less than 2% to the total current. The higher ethanol oxidation current density on the Pt3Sn/C catalyst at these potentials results from higher yields of C2 products, not from an improved complete ethanol oxidation to CO2.
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Affiliation(s)
- Q Wang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
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15
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Abstract
The inducible enzyme cyclooxygenase-2 (COX-2) is an important mediator of angiogenesis and tumor growth. Several reports have indicated that vascular endothelial growth factor (VEGF)-positive tumors are associated with an increased amount of COX-2 protein. This study evaluated the significance of COX-2 in 34 patients with endometrial carcinoma and its relationship to angiogenesis. Immunohistochemical expression of COX-2 and VEGF was analyzed on paraffin-embedded tissue sections. Microvessel density (MVD) of endometrial carcinoma was also determined with anti-CD(34) as the label. COX-2 messenger RNA (mRNA) was analyzed by reverse transcription-polymerase chain reaction. The expression rate of COX-2 in 34 cases was 64.7% but not in control endometrium. COX-2 mRNA was higher in tumor specimens than in normal tissues. The level of COX-2 expression was higher in grade 2 tumors than in grade 3 tumors (P < 0.05). MVD was higher in COX-2-positive and VEGF-positive cases than in COX-2-negative and VEGF-negative cases (P < 0.05). The expression of COX-2 was positively correlated with the expression of VEGF and MVD (P < 0.05 and P < 0.01, respectively). The present findings suggest that overexpression of COX-2 may induce the expression of VEGF, increase angiogenesis, and enhance tumor growth.
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Affiliation(s)
- W Li
- Department of Gynecology and Obstetrics, First People's Hospital Hangzhou, Zhejiang, People's Republic of China.
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16
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Lee DY, Cho CS, Jiang LH, Wu X, Shim SC, Oh DH. Palladium-Catalyzed Synthesis of 3-Alkylphthalides via Carbonylative Cyclization ofo-Bromobenzaldehyde with 1,3-Dicarbonyl Compounds. SYNTHETIC COMMUN 2006. [DOI: 10.1080/00397919708005646] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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17
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Jiang LH, Rassendren F, Spelta V, Surprenant A, North RA. Amino acid residues involved in gating identified in the first membrane-spanning domain of the rat P2X(2) receptor. J Biol Chem 2001; 276:14902-8. [PMID: 11278888 DOI: 10.1074/jbc.m011327200] [Citation(s) in RCA: 101] [Impact Index Per Article: 4.4] [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: 11/06/2022] Open
Abstract
The first hydrophobic segment of the rat P2X(2) receptor extends from residue Leu(29) to Val(51). In the rat P2X(2) receptor, we mutated amino acids in this segment and adjoining flanking regions (Asp(15) through Thr(60)) individually to cysteine and expressed the constructs in human embryonic kidney cells. Whole-cell recordings were used to measure membrane currents evoked by brief (2-s) applications of ATP (0.3-100 microM). Currents were normal except for Y16C, R34C, Y43C, Y55C, and Q56C (no currents but normal membrane expression by immunohistochemistry), Q37C (small currents), and F44C (normal current but increased sensitivity to ATP, as well as alphabeta-methylene-ATP). We used methanethiosulfonates of positive, negative, or no charge to test the accessibility of the substituted cysteines. D15C, P19C, V23C, V24C, G30C, Q37C, F44C, and V48C were strongly inhibited by neutral, membrane-permeant methanethiosulfonates. Only V48C was also inhibited by positively and negatively charged methanethiosulfonates, consistent with an extracellular position; however, accessibility of V48C was increased by channel opening. V48C could disulfide with I328C, as shown by the large increase in ATP-evoked current caused by reducing agents. The results suggest that Val(48) at the outer end of the first hydrophobic segment takes part in the gating movement of channel opening.
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Affiliation(s)
- L H Jiang
- Institute of Molecular Physiology, University of Sheffield, Alfred Denny Building, Western Bank, Sheffield S10 2TN, United Kingdom
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18
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Jiang LH, Rassendren F, Surprenant A, North RA. Identification of amino acid residues contributing to the ATP-binding site of a purinergic P2X receptor. J Biol Chem 2000; 275:34190-6. [PMID: 10940304 DOI: 10.1074/jbc.m005481200] [Citation(s) in RCA: 169] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
P2X receptor subunits have intracellular N and C termini, two membrane-spanning domains, and an extracellular loop of about 280 amino acids. We expressed the rat P2X(2) receptor in human embryonic kidney cells, and used alanine-scanning mutagenesis on 30 residues with polar side chains conserved among the seven rat P2X receptor subunits. This identified a region proximal to the first transmembrane domain which contained 2 lysine residues that were critical for the action of ATP (Lys(69) and Lys(71)). We substituted cysteines in this region (Asp(57) to Asp(71)) and found that for S65C and I67C ATP-evoked currents were inhibited by methanethiosulfonates. At I67C, the inhibition by negatively charged ethylsulfonate and pentylsulfonate derivatives could be overcome by increasing the ATP concentration, consistent with a reduced affinity of ATP binding. The inhibitory action of the methanethiosulfonates was prevented by pre-exposure to ATP, suggesting occlusion of the binding site. Finally, introduction of negative charges into the receptor by mutagenesis at this position (I67E and I67D) also gave receptors in which the ATP concentration-response curve was right-shifted. The results suggest that residues close to Ile(67) contribute to the ATP-binding site.
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Affiliation(s)
- L H Jiang
- Institute of Molecular Physiology, University of Sheffield, Alfred Denny Building, Western Bank, Sheffield, S10 2TN, United Kingdom
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19
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Abstract
There are few antagonists selective for subtypes of the several P2X receptors, but these are needed to identify the receptors expressed on native cells and tissues. In particular, P2X(4) and P2X(7) receptor subunits are colocalized on immune, epithelial, and exocrine gland cells, but both are relatively insensitive to suramin and pyridoxal-5-phosphate-6-azo-2',4'-disulfonic acid derivative. In this article, we show that Coomassie Brilliant Blue G selectively inhibits P2X(7) receptors with nanomolar affinity. We measured currents in response to P2X receptor activation in HEK293 cells heterologously expressing human or rat P2X(1), P2X(2), P2X(3), P2X(2/3), P2X(4), P2X(1/5), and P2X(7) receptors. Brilliant Blue G produced a noncompetitive inhibition of rat and human P2X(7) receptors with IC(50) values of 10 and 200 nM, respectively. IC(50) values for inhibition of the other receptors ranged from 2 to >30 microM; the rat and human P2X(4) receptors showed IC(50) values of >10 and 3.2 microM. Coomassie Blue G also blocked YO-PRO1 uptake and membrane blebbing, which are uniquely associated with activation of P2X(7) receptors. Thus, Brilliant Blue G is at least 1000-fold more potent at rat P2X(7) receptors than at rat P2X(4) receptors.
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Affiliation(s)
- L H Jiang
- Institute of Molecular Physiology, University of Sheffield, England
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20
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Jiang LH, Gawler DJ, Hodson N, Milligan CJ, Pearson HA, Porter V, Wray D. Regulation of cloned cardiac L-type calcium channels by cGMP-dependent protein kinase. J Biol Chem 2000; 275:6135-43. [PMID: 10692404 DOI: 10.1074/jbc.275.9.6135] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.3] [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: 11/06/2022] Open
Abstract
We have studied the effect of 8-bromo-cyclic GMP (8-Br-cGMP) on cloned cardiac L-type calcium channel currents to determine the site and mechanism of action underlying the functional effect. Rabbit cardiac alpha(1C) subunit, in the presence or absence of beta(1) subunit (rabbit skeletal muscle) or beta(2) subunit (rat cardiac/brain), was expressed in Xenopus oocytes, and two-electrode voltage-clamp recordings were made 2 or 3 days later. Application of 8-Br-cGMP caused decreases in calcium channel currents in cells expressing the alpha(1C) subunit, whether or not a beta subunit was co-expressed. No inhibition of currents by 8-Br-cGMP was observed in the presence of the protein kinase G inhibitor KT5823. Substitutions of serine residues by alanine were made at residues Ser(533) and Ser(1371) on the alpha(1C) subunit. As for wild type, the mutant S1371A exhibited inhibition of calcium channel currents by 8-Br-cGMP, whereas no effect of 8-Br-cGMP was observed for mutant S533A. Inhibition of calcium currents by 8-Br-cGMP was also observed in the additional presence of the alpha(2)delta subunit for wild type channels but not for the mutant S533A. These results indicate that cGMP causes inhibition of L-type calcium channel currents by phosphorylation of the alpha(1C) subunit at position Ser(533) via the action of protein kinase G.
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Affiliation(s)
- L H Jiang
- School of Biomedical Sciences, University of Leeds, Leeds LS2 9JT, United Kingdom
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Cho CS, Jiang LH, Shim SC. Synthesis of Isoindolinones by Palladium-Catalyzed Carbonylative Cyclization of 2-Bromobenzaldehyde with Diamines. SYNTHETIC COMMUN 1998. [DOI: 10.1080/00032719808006483] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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22
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Jiang LH, Kasser RJ, Altar CA, Wang RY. One year of continuous treatment with haloperidol or clozapine fails to induce a hypersensitive response of caudate putamen neurons to dopamine D1 and D2 receptor agonists. J Pharmacol Exp Ther 1990; 253:1198-205. [PMID: 1972751] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
In a "blind" experimental design, the sensitivity of caudate-putamen (CPu) cells to the selective dopamine (DA) D1 receptor agonist SKF-38393 and D2 receptor agonist LY171555 (quinpirole) in rats treated with either haloperidol (HAL), clozapine or tap water for 1 year was compared using the techniques of single cell recording and microiontophoresis. Although the maximum binding value for D2 receptors was elevated in chronic HAL-treated rats, there was no sign of electrophysiological supersensitivity of CPu neurons to the selective DA D1 and D2 receptor agonists. CPu cells were subsensitive to LY-171555 in HAL-treated rats without a drug withdrawal period. This suggests that residual HAL in the rat brain actively blocked the D2 DA receptors. In contrast, in clozapine-treated rats with or without a drug withdrawal period, the sensitivity of CPu cells to either the D1 or D2 agonists was not altered. Coadministration of SKF-38393 and LY-171555 onto the CPu neurons primarily produced an additive effect and only two cells both from the HAL group showed a synergistic action. The majority of CPu cells failed to respond to iontophoretic application of CCK-8S in either the control or antipsychotic drug-treated rats. If these findings can be extended to humans, they do not support the view that tardive dyskinesia is the result of CPu DA receptor supersensitivity.
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Affiliation(s)
- L H Jiang
- Department of Psychiatry and Behavioral Sciences, State University of New York, Stony Brook
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23
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Jiang LH, Ashby CR, Kasser RJ, Wang RY. The effect of intraventricular administration of the 5-HT3 receptor agonist 2-methylserotonin on the release of dopamine in the nucleus accumbens: an in vivo chronocoulometric study. Brain Res 1990; 513:156-60. [PMID: 2112416 DOI: 10.1016/0006-8993(90)91103-n] [Citation(s) in RCA: 134] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
In the present study we have examined the effects of the serotonin3 (5-HT3) agonist 2-methylserotonin (2-Me-5HT) on the dopamine (DA) release in the nucleus accumbens (NAc) of rats using in vivo chronocoulometric recording. The intraventricular (i.c.v.) administration of 2-Me-5HT dose-dependently increased the DA release in the NAc. This effect was blocked by the selective 5-HT3 antagonist BRL-43694 (granisetron), but not by the 5-HT1/5-HT2 antagonist metergoline. The i.c.v. injection of 8-hydroxydipropylaminotetraline (8-OHDPAT, a selective 5-HT1a agonist) or (+/-)-1-(2,5-dimethoxy-4-iodophenyl)-2-aminopropane (DOI, a 5-HT2/5-HT1c agonist) failed to alter the DA release in the NAc. The increase in the DA release produced by 2-Me-5HT was abolished in animals that had received acute bilateral injections of 6-hydroxydopamine (6-OHDA) into the medial forebrain bundle. Our results suggest that the 2-Me-5HT-induced DA release in the NAc is mediated by 5-HT3 receptors. In addition, 2-Me-5HT induced effect is dependent upon the impulse flow of DA cells.
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Affiliation(s)
- L H Jiang
- Department of Psychiatry and Behavioral Sciences, State University of New York, Stony Brook 11794-8790
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24
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Ashby CR, Jiang LH, Wang RY. Chronic BRL 43694, a selective 5-HT3 receptor antagonist, fails to alter the number of spontaneously active midbrain dopamine neurons. Eur J Pharmacol 1990; 175:347-50. [PMID: 2157603 DOI: 10.1016/0014-2999(90)90574-p] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
In this study, we examined the effect of chronic administration of the selective 5-HT3 receptor antagonist BRL 43694 on the number of spontaneously active A9 (substantia nigra pars compacta) and A10 (ventral tegmental area) dopamine (DA) cells using the technique of extracellular single unit recording. Overall, chronic BRL 43694 (21 days, 5 mg/kg per day or 2.5 mg/kg q.i.d) failed to alter the number of spontaneously active DA cells in either area compared to saline-injected controls. Furthermore, the acute i.v. administration of BRL 43694 did not change A10 DA cell baseline firing rate. These data suggest that if BRL 43694 possesses antipsychotic activity, it is not the result of its action on midbrain DA neurons.
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Affiliation(s)
- C R Ashby
- Department of Psychiatry and Behavioral Sciences, State University of New York, Stony Brook 11794-8790
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25
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Ashby CR, Jiang LH, Kasser RJ, Wang RY. Electrophysiological characterization of 5-hydroxytryptamine2 receptors in the rat medial prefrontal cortex. J Pharmacol Exp Ther 1990; 252:171-8. [PMID: 2137174] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
The aim of the present study was to characterize 5-hydroxytryptamine2 (5-HT2) receptors in the rat medial prefrontal cortex (mPFc) by single cell recording and microiontophoretic techniques. This was accomplished using 5-HT2 receptor agonists 1-[2,5-dimethoxy-4-iodophenyl]-2-aminopropane [(+/-)-DOI] and 1-[2,5-dimethoxy-4-bromophenyl]-2-aminopropane [(+/-)-DOB]. DOI ejected at a low current (0.5 nA) potentiates glutamate (GLU)-induced activation of mPFc neurons and this effect is blocked by spiperone. At higher currents. DOI invariably inhibits GLU-induced neuronal activity. The microiontophoretic ejection of both DOI and DOB predominantly inhibits spontaneously active mPFc cells. The inhibitory action of DOI on spontaneously active cells is dose-dependent and is blocked by putative 5-HT2 receptor antagonists, with a rank order of potency as follows: ritanserin greater than metergoline approximately LY-53857 greater than spiperone greater than mesulergine greater than mianserin approximately ketanserin. Interestingly, ketanserin and mianserin only weakly block the effect of DOI. The suppressant action of DOI is probably not related to its interaction with 5-HT10 sites as spiperone, which has low affinity for these sites, potently blocks the effect of DOI. The suppressant effect of DOI is not blocked by other receptor antagonists such as BRL-43694 (5-HT3), (+/-)-pindolol (5HT 1a,1b, beta adrenergic, beta), prazosin (adrenergic1, alpha-1), pyrilamine (histamine1, H1), l-sulpiride (dopamine2, D2) or SR 95103 (gamma-aminobutyric acid, GABAA). Overall our results indicate that DOI predominantly inhibits mPFc cells in a direct manner and this effect is mediated by 5-HT2 receptors.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- C R Ashby
- Department of Psychiatry and Behavioral Science, State University of New York, Stony Brook
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26
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Abstract
Intravenous administration of the cholecystokinin (CCK) antagonist lorglumide (LORG) reversed chronic haloperidol (CHAL)-induced depolarization inactivation (DI) of dopamine (DA) cells in both the A9 and A10 areas. Moreover, microinjection of LORG, but not naloxone, directly into the medial nucleus accumbens (mNAc) dose-dependently reversed CHAL-induced effect. LORG injected into other brain regions was without effect. These results suggest that CCK receptors in the mNAc form an important link for maintaining CHAL-induced DI of DA cells and that CCK is involved in the therapeutic action of antipsychotic drugs.
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Affiliation(s)
- L H Jiang
- Department of Psychiatry and Behavioral Sciences, State University of New York, Stony Brook 11794-8790
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27
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Jiang LH, Oomura Y. Effect of catecholamine-receptor antagonists on feeding-related neuronal activity in the central amygdaloid nucleus of the monkey: a microiontophoretic study. J Neurophysiol 1988; 60:536-48. [PMID: 2845014 DOI: 10.1152/jn.1988.60.2.536] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
1. Neuronal activity in the central amygdaloid nucleus (ACE) was recorded during a visually guided bar-press feeding task, and the modulatory effects of catecholaminergic blockers were investigated. 2. The feeding task had the following four phases: 1) a cue light to signal the start of bar press, 2) bar press, 3) a short cue tone followed by food delivery, and 4) ingestion reward. Of 278 cells observed, 176 (63%) increased or decreased their discharge rates in one or more phases of the feeding task. Of these, 60 (34%) responded to the cue light, 81 (46%) to the bar press, 66 (37%) to the cue tone, and 176 (100%) during the reward period. In the ingestion reward phase, firing of 128 (73%) increased and firing of 48 (27%) decreased. The reward-related response depended on the nature of food. In the trials with aversion food, some neurons increased firing (n = 6), whereas others showed opposite firing changes (n = 10). 3. The decreased firing rate during the reward period was greatly attenuated in the no-reward tasks (n = 29) and was blocked by electrophoretic application of a beta-adrenoceptive antagonist [sotalol (SOT), n = 26]. Noradrenaline (NA) application mimicked the inhibitory effect on the reward-related activity during extinction trial (n = 4). These results suggest that the decreased firing rate observed during the reward period was modulated by beta-adrenoreceptors. 4. Of 32 neurons tested, the activity of 8 (25%) and 14 (44%) were enhanced by the cue light or bar press, respectively. These effects were attenuated by electrophoretic application of a dopamine (DA) antagonist [spiperone (SPP)] but not by SOT. This indicates that dopaminergic inputs may be related to recognition of visual signals and to motor initiation during the monkey feeding paradigm.
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Affiliation(s)
- L H Jiang
- Department of Physiology, Faculty of Medicine, Kyushu University 60, Fukuoka, Japan
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28
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Jin JX, Jiang LH, Ni MX. [Percutaneous transhepatic portography: a modified technique and its uses]. Zhonghua Nei Ke Za Zhi 1988; 27:214-5, 260. [PMID: 3064994] [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: 01/04/2023]
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29
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Jiang LH, Tsai M, Wang RY. Chronic treatment with high doses of haloperidol fails to decrease the time course for the development of depolarization inactivation of midbrain dopamine neurons. Life Sci 1988; 43:75-81. [PMID: 3386416 DOI: 10.1016/0024-3205(88)90239-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Using extracellular single unit recording techniques, we investigated the effects produced by chronic treatment with high doses of haloperidol (CHAL, 5 mg/kg/day, s.c.) on midbrain dopamine (DA) neuronal activity. This regimen of HAL treatment produced a time-dependent reduction in the number of spontaneously active DA neurons. Additionally, this dose regimen induced an irregular firing pattern in many of the remaining active DA neurons in both the ventral tegmental area (A10) and substantia nigra pars compacta (A9) regions. These effects were comparable to those obtained previously in rats treated chronically with lower doses of HAL (0.5 mg/kg/day, s.c.). However, there was a greater decrease in the number of spontaneously active DA cells detected in rats treated with high doses of HAL for three weeks compared to those receiving the low doses. On the other hand, higher doses of apomorphine (200 micrograms/kg, i.v.) were required to reverse both the reduction of DA activity and irregular discharge pattern in rats treated chronically with high doses of HAL. In conclusion, the results of the present study substantiate the view that CHAL-induced depolarization inactivation (DI) of DA neurons is a time-dependent process and chronic treatment with high doses of HAL did not shorten the time course required for the development of DI on the majority of midbrain DA neurons.
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Affiliation(s)
- L H Jiang
- State University of New York, Department of Psychiatry and Behavioral Science, Stony Brook, 11794-8790
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30
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Jiang LH, Shen E. [Electrophysiological studies of preganglionic neurons in the superior salivatory nucleus of cats]. Sheng Li Xue Bao 1985; 37:503-9. [PMID: 3841982] [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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31
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Jiang LH, Shen E. [Neurochemical mechanism of the central control of feeding]. Sheng Li Ke Xue Jin Zhan 1984; 15:120-125. [PMID: 6149617] [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: 05/21/2023]
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