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Zhang JH, Long R, Jing YY, Zhang P, Xu Y, Xiong W, Zhu YQ, Luo YP. Loss of behavioral stress response in blind cavefish reduces energy expenditure. Zool Res 2023; 44:678-692. [PMID: 37147886 PMCID: PMC10415775 DOI: 10.24272/j.issn.2095-8137.2022.354] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Accepted: 04/27/2023] [Indexed: 05/07/2023] Open
Abstract
The stress response is essential for animal self-defense and survival. However, species may exhibit stress response variation depending on their specific environmental and selection pressures. Blind cavefish dwell in cave environments, which differ markedly in stressors and resource availability compared to surface aquatic environments. However, whether blind cavefish exhibit differences in stress response as an adaptation to their cave environments remains unclear. Here, we investigated differences in stress response in six closely related Triplophysa species, including three blind cavefish (T. longibarbata, T. jiarongensis, and T. rosa) and three normal-sighted river fish (T. nasobarbatula, T. dongsaiensis, and T. bleekeri). Results showed that blind cavefish exhibited a range of distinct behavioral responses compared to sighted river fish, including greater levels of activity, shorter duration of freezing, absence of erratic movements or thrashing behavior, and opposite behavioral trends over time. Furthermore, the cavefish species demonstrated attenuated increases in metabolic rate in response to stressors related to novel environments. Cave-dwelling T. rosa also exhibited lower basal hypothalamic-pituitary-inter-renal (HPI) axis-related gene expression levels and stress hormone concentrations compared to river-dwelling T. bleekeri. These results suggest that blind cavefish may have lost their behavioral stress response, potentially mediated by a reduction in basal activity of the HPI axis, thus enabling the conservation of energy by reducing unnecessary expenditure in energy-limited caves.
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Affiliation(s)
- Jiang-Hui Zhang
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, School of Life Sciences, Southwest University, Chongqing 400715, China
| | - Rui Long
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, School of Life Sciences, Southwest University, Chongqing 400715, China
| | - Yang-Yang Jing
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, School of Life Sciences, Southwest University, Chongqing 400715, China
| | - Pan Zhang
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, School of Life Sciences, Southwest University, Chongqing 400715, China
| | - Yuan Xu
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, School of Life Sciences, Southwest University, Chongqing 400715, China
| | - Wei Xiong
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, School of Life Sciences, Southwest University, Chongqing 400715, China
| | - Yan-Qiu Zhu
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, School of Life Sciences, Southwest University, Chongqing 400715, China
| | - Yi-Ping Luo
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, School of Life Sciences, Southwest University, Chongqing 400715, China. E-mail:
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Yu T, Cao J, Rutkowski L, Luo YP. Finite-Time Synchronization of Complex-Valued Memristive-Based Neural Networks via Hybrid Control. IEEE Trans Neural Netw Learn Syst 2022; 33:3938-3947. [PMID: 33566775 DOI: 10.1109/tnnls.2021.3054967] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The finite-time synchronization problem is investigated for the master-slave complex-valued memristive neural networks in this article. A novel Lyapunov-function based finite-time stability criterion with impulsive effects is proposed and utilized to design the decentralized finite-time synchronization controller. Not only the settling time but also the attractive domain with respect to the impulsive gain and average impulsive interval, as well as initial values is derived according to the sufficient synchronization condition. Two examples are outlined to illustrate the validity of our hybrid control strategy.
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Wang TL, Luo YP, Zhou ZF, Liu JF, Hou XD, Jia SH, Zheng LP. O-Arm-Navigated, Robot-Assisted Versus Conventional CT Guided Radiofrequency Ablation in Treatment of Osteoid Osteoma: A Retrospective Cohort Study. Front Surg 2022; 9:881852. [PMID: 35586510 PMCID: PMC9108172 DOI: 10.3389/fsurg.2022.881852] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [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: 02/23/2022] [Accepted: 03/28/2022] [Indexed: 11/13/2022] Open
Abstract
BackgroundOsteoid osteoma is a common benign bone tumor, and clinically there is severe local pain that typically worsens at night. The conventional CT-guided radiofrequency ablation (RFA) was widely used in the treatment of osteoid osteoma (OO), which could result in some radiation-related and imprecise complications due to the overdose of radiation exposure. This study aimed to compare the surgical effect of robot-assisted RFA with O-arm navigation and conventional CT-guided RFA in the treatment of OO.MethodsSixty-two patients who underwent robot-assisted RFA with O-arm navigation (Robot-RFA, n = 24) or CT-guided RFA (CT-RFA, n = 38) were included in this retrospective cohort study. The mean follow-up time was 23.3 months. The intra-operative data, primary technical success rate, visual analog scale (VAS), and post-operative complications were analyzed.ResultsPrimary technical success was obtained in 23 patients who had robot-assisted RFA, and 35 patients who had conventional CT-guided RFA. One patient in Robot-RFA group and three patients in CT-RFA group with pain recurrence received repeat-RFA and had a secondary success. Mean operation time and dose of radiation exposure were lower in Robot-RFA group than that in CT-RFA group. The Robot-RFA group took fewer K-wire adjustment times for each patient than the CT-RFA group. There was a statistically significant difference in the mean operation time, dose of radiation exposure, and K-wire adjustment times between the groups (p < 0.05). No complications associated with the procedure were reported in the two groups during the follow-up period.ConclusionRobot-assisted RFA with O-arm navigation is a safer and more precise strategy in the treatment of osteoid osteoma with less operation time and radiation exposure compared with the conventional CT-guided radiofrequency ablation.
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Qiu Y, Jiang XY, Luo YP, Li J, Zhou DB, Cao XX. [A 55-year-old male with anemia and monoclonal gammopathy]. Zhonghua Xue Ye Xue Za Zhi 2020; 40:783-785. [PMID: 31648486 PMCID: PMC7342450 DOI: 10.3760/cma.j.issn.0253-2727.2019.09.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Y Qiu
- Department of Hematology, Peking Union Medical College Hospital, CAMS & PUMC, Beijing 100730, China
| | - X Y Jiang
- Department of Hematology, Peking Union Medical College Hospital, CAMS & PUMC, Beijing 100730, China
| | - Y P Luo
- Department of Nuclear Medicine, Peking Union Medical College Hospital, CAMS & PUMC, Beijing 100730, China
| | - J Li
- Department of Hematology, Peking Union Medical College Hospital, CAMS & PUMC, Beijing 100730, China
| | - D B Zhou
- Department of Hematology, Peking Union Medical College Hospital, CAMS & PUMC, Beijing 100730, China
| | - X X Cao
- Department of Hematology, Peking Union Medical College Hospital, CAMS & PUMC, Beijing 100730, China
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Lan YH, Wu B, Shi YX, Luo YP. Iterative learning based consensus control for distributed parameter multi-agent systems with time-delay. Neurocomputing 2019. [DOI: 10.1016/j.neucom.2019.04.064] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Shen YY, Ye LY, Zhang YQ, Song LJ, Zhao Q, Luo YP, Zhang Y. [Analysis of antimicrobial resistance and risk factors of community-onset methicillin-resistant staphylococcus aureus infection]. Zhonghua Yi Xue Za Zhi 2018; 98:2588-2590. [PMID: 30220145 DOI: 10.3760/cma.j.issn.0376-2491.2018.32.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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 analyze risk factors and drug resistance of community-onset methicillin-resistant staphylococcus aureus (CO-MRSA) infection through the investigation of patients infected with CO-MRSA. Methods: The clinical data of 97 cases infected with community-onset staphylococcus aureus (COSA) was collected in this hospital from July 2016 to June 2017. Epidemiological survey method and the variables were determined according to expert consultation, literature and practical work experience. Results: Among 97 patients infected with COSA, the diagnosis rate of CO-MRSA was 21.65%(21/97). The drug sensitivity results showed that: CO-MRSA was high resistant to erythromycin, tetracycline and clindamycin, and the drug resistance rate exceeded 50%. Multiple variables were analyzed by Logistic regression. The usage of antimicrobial agents in the past three months and the history of hospitalization within one year were the independent risk factors. The MRSA infection rate was 57.89%(11/19) of the persons who had taken antibacterial agents in the recent three months.The MRSA infection rate was 48.28%(14/29) of the persons who had been hospitalized in the past one year. OR value of two risk factors was respectively 10.006(95%CI: 2.200-45.519, P=0.030) and 11.519(95%CI: 2.405-55.177, P=0.002). Conclusions: Most COSA is sensitive to methicillin, but CO-MRSA is multidrug resistant and has more risk factors. The clinicians should reasonably use the antibacterial agents according to the drug sensitivity in order to prevent the occurrence of multidrug resistant MRSA.
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Affiliation(s)
- Y Y Shen
- Department of Microbiology, General Hospital of PLA, Beijing 100853, China
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Luo YP, Pan QQ, Li F, Yu M, Xing XP, Zhang TP, Zhao YP. [(68)Ga-exendin-4 PET-CT for the localization of occult insulinomas: a prospective cohort study]. Zhonghua Wai Ke Za Zhi 2018; 56:837-842. [PMID: 30392304 DOI: 10.3760/cma.j.issn.0529-5815.2018.11.009] [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 explore the accuracy in localizing occult insulinomas with Glucagon-like peptide-1 receptor(GLP-1R) PET-CT with (68)Ga-exendin-4. Methods: In this prospective cohort study, patients with biochemically proven endogenous hyperinsulinemic hypoglycemia and negative contrast-enhanced CT with pancreatic perfusion scans were enrolled consecutively at Department of Nuclear Medicine, Peking Union Medical College Hospital from February 2014 to June 2018.There were 37 males and 32 females, with age of (43.2±17.9)years. (68)Ga-exendin-4 PET-CT, MRI and endoscopic ultrasound(EUS) were done before elective surgery. Sensitivity, specificity, accuracy, positive predictive value(PPV) and negative predictive value(NPV) of the above imaging modalities were calculated. Results: A total of 69 patients were recruited. Thirty-two patients were diagnosed with insulinomas at histology. Four patients with positive (68)Ga-exendin-4 PET-CT findings did not undergo surgery so far. Twenty-eight patients were proven to be noninsulinoma induced hyperinsulinemic hypoglycemia. Five patients were unknown of etiology of hypoglycemia. The sensitivity, specificity, accuracy, PPV and NPV of (68)Ga-exendin-4 in localizing occult insulinomas were 96.9%(31/32), 100%(30/30), 98.3%(59/60), 100%(29/29), 96.8%(30/31), respectively.The sensitivity, specificity, accuracy, PPV and NPV of MRI were 74.1%(20/27), 9/11, 76.3%(29/38), 90.9%(20/22), 9/16, respectively. The sensitivity, specificity, accuracy, PPV and NPV of EUS were 75.0% (15/20), 2/2, 77.3%(17/22), 15/15, and 2/7. Conclusion: (68)Ga-exendin-4 PET-CT has a high sensitivity, specificity and accuracy for detection of occult insulinoma, which shows superiority to MRI and EUS.
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Affiliation(s)
- Y P Luo
- Department of Nuclear Medicine, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing Key Laboratory of Molecular Targeted Diagnosis and Therapy in Nuclear Medicine, Beijing 100730, China
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Huang G, Luo YP, Zhang CF, Huang YS, Zhao KH. Current Sensor Fault Diagnosis Based on a Sliding Mode Observer for PMSM Driven Systems. Sensors (Basel) 2015; 15:11027-49. [PMID: 25970258 PMCID: PMC4481899 DOI: 10.3390/s150511027] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Revised: 04/20/2015] [Accepted: 05/06/2015] [Indexed: 11/18/2022]
Abstract
This paper proposes a current sensor fault detection method based on a sliding mode observer for the torque closed-loop control system of interior permanent magnet synchronous motors. First, a sliding mode observer based on the extended flux linkage is built to simplify the motor model, which effectively eliminates the phenomenon of salient poles and the dependence on the direct axis inductance parameter, and can also be used for real-time calculation of feedback torque. Then a sliding mode current observer is constructed in αβ coordinates to generate the fault residuals of the phase current sensors. The method can accurately identify abrupt gain faults and slow-variation offset faults in real time in faulty sensors, and the generated residuals of the designed fault detection system are not affected by the unknown input, the structure of the observer, and the theoretical derivation and the stability proof process are concise and simple. The RT-LAB real-time simulation is used to build a simulation model of the hardware in the loop. The simulation and experimental results demonstrate the feasibility and effectiveness of the proposed method.
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Affiliation(s)
- Gang Huang
- School of Traffic and Transportation Engineering, Central South University, Changsha 410075, China.
- College of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou 412007, China.
| | - Yi-Ping Luo
- School of Traffic and Transportation Engineering, Central South University, Changsha 410075, China.
| | - Chang-Fan Zhang
- College of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou 412007, China.
| | - Yi-Shan Huang
- Hunan CSR Times Electric Vehicle Co., Ltd, Zhuzhou 412007, China.
| | - Kai-Hui Zhao
- School of Traffic and Transportation Engineering, Central South University, Changsha 410075, China.
- College of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou 412007, China.
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Abstract
The effects of body mass (M) and temperature (T) on routine metabolic rate (m(R) ) were assessed in the largemouth bronze gudgeon Coreius guichenoti, from Three Gorges Reservoir, Yangtze River, China. The m(R) increased with increasing M by factors (b-value in the equation m(R) = aM(b) ) of 0·843, 0·800, 0·767, 0·788 and 0·822 at 10, 15, 20, 25 and 30° C, respectively. A significant interaction between M and T on m(R) was observed. The variation in the b-value at different T suggests that the b-values were not consistent with the universal allometric exponent 0·75. After controlling for M, the relationship between the normalized standard metabolic rate (m(S), mg O(2) kg(-1) h(-1)) and T was described by an exponential equation: m(S) = 9·89e((0·093T)) . The results indicate that the effects of M on m(R) depend on T. The increased water temperature induced by dam construction on the Yangtze River may cause a marked increase in energy demand by this species, with potential ecological consequences.
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Affiliation(s)
- Y P Luo
- Key Laboratory of Freshwater Fish Reproduction and Development, Southwest University, Ministry of Education, Chongqing 400715, China.
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Li L, Zhao XT, Luo YP, Zhao JF, Yang XD, Zhang HB. Novel cytotoxic chalcones from Litsea rubescens and Litsea pedunculata. Bioorg Med Chem Lett 2011; 21:7431-3. [PMID: 22047698 DOI: 10.1016/j.bmcl.2011.10.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2011] [Revised: 09/16/2011] [Accepted: 10/04/2011] [Indexed: 11/19/2022]
Abstract
Two novel flavonoids with chalcone skeleton, together with seven known flavonoids, were isolated from the stem barks of Litsea rubescens and Litsea pedunculata. The structures of the new compounds were elucidated on the basis of spectral methods including IR, UV, 1D and 2D NMR. The new chalcones were found to contain the rare epoxy or ethylidenedioxy group. This is the first report on the presence of chalcone in the plant genus Litsea. The cytotoxic potential of two new chalcones was evaluated in vitro against three human tumor cell lines. Both new chalcones displayed potent cytotoxic activities against myeloid leukaemia (HL-60) and epidermoid carcinoma (A431) cell lines and more active than cisplatin (DDP). Interestingly, compound 1 exhibited cytotoxic activity against HL-60 with IC(50) value 2.1-fold more sensitive to DDP.
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Affiliation(s)
- Liang Li
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, PR China
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Lu YC, Luo YP, Wang YW, Tai CK. Highly efficient gene transfer to solid tumors in vivo by tumor-selective replicating retrovirus vectors. Int J Mol Med 2010; 25:769-75. [PMID: 20372821 DOI: 10.3892/ijmm_00000403] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Tumor-selective replicating viruses are attractive tools for cancer gene therapy, but generally achieve only transitory tumor suppression. However, replicating retrovirus vectors (RRVs) can achieve highly efficient and tumor-selective transduction, as well as persistent expression of transgenes. We therefore developed RRVs that express the yeast cytosine deaminase (yCD) and herpes simplex virus thymidine kinase (TK), which exhibit remarkably enhanced cytotoxicity after administration of the prodrugs 5-fluorocytosine (5-FC) and ganciclovir (GCV) concomitant with the efficiency of their replicative spread, and tested their therapeutic effect in vitro and in vivo. In subcutaneous MDA-MB-435 human breast cancer xenograft models, RRV-mediated yCD and TK suicide gene therapy significantly suppressed tumor growth after prodrug administration. Notably, no systemic spread of the vector to extratumoral tissues was detected. Our results thus demonstrate that efficient, tumor-selective, and stable integration achieved by RRVs causes efficient cell killing upon prodrug administration, resulting in significant suppression of tumor growth.
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Affiliation(s)
- Yin-Che Lu
- Division of Hematology-Oncology, Department of Internal Medicine, Chia-Yi Christian Hospital, Taiwan, ROC
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Luo YP, Zhou H, Krueger J, Kaplan C, Liao D, Markowitz D, Liu C, Chen T, Chuang TH, Xiang R, Reisfeld RA. The role of proto-oncogene Fra-1 in remodeling the tumor microenvironment in support of breast tumor cell invasion and progression. Oncogene 2009; 29:662-73. [PMID: 19966854 PMCID: PMC3032566 DOI: 10.1038/onc.2009.308] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
A growing body of evidence indicates that interactions between neoplastic cells and tumor-associated macrophages (TAMs) in the tumor microenvironment (TME) are crucial in promoting tumor cell invasion and progression. Macrophages play an ambiguous role in these processes since this M1 phenotype correlates with tumoricidal capacity whereas TAMs of M2 phenotype exert tumor-promoting effects. Here, we provide evidence that interactions between mouse breast tumor cells and TAMs remodel the TME, leading to upregulation of Fra-1, a member of the FOS family of transcription factor. In turn, this proto-oncogene initiates activation of the IL-6/JAK/Stat3 signaling pathway. This creates a malignant switch in breast tumor cells, leading to increased release of pro-angiogenic factors MMP-9, VEGF and TGF-β from tumor cells and intensified invasion and progression of breast cancer. Proof of concept for the crucial role played by transcription factor Fra-1 in regulating these processes was established by specific knockdown of Fra-1 with siRNA which resulted in marked suppression of tumor cell invasion, angiogenesis and metastasis in a mouse breast cancer model. Such a strategy could eventually lead to future efficacious treatments of metastatic breast cancer.
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Affiliation(s)
- Y P Luo
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA 92037, USA.
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Abstract
A novel norditerpenoid alkaloid, macrorhynine C (1), together with three known compounds, was isolated from Aconitum macrorhynchum. The structure of the new alkaloid was elucidated on the basis of spectral analyses as (1alpha,6alpha,16beta)-3-hydroxy-8-acetyloxy-13-hydroxy-1,6,16-trimethoxy-4-(methoxymethyl)-19-ene-aconitan-14-yl 4-methoxybenzoate (1). The novel compound was found to contain the rare C(19) = N azomethine group. Compounds 2-4 were obtained from this species for the first time.
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Affiliation(s)
- Li-Juan Yang
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, China
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Luo YP, Xue YM, Zhao YQ. [Single-nucleotide polymorphisms and genotype combinations in calpain-10 gene of gestational diabetes mellitus]. Zhonghua Liu Xing Bing Xue Za Zhi 2009; 30:101-102. [PMID: 19565864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Affiliation(s)
- Yi-Ping Luo
- Endocrinology Department of the Nanfang Hospital, Guangzhou 510010, China
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Li MS, Luo YP, Su ZY. Heavy metal concentrations in soils and plant accumulation in a restored manganese mineland in Guangxi, South China. Environ Pollut 2007; 147:168-75. [PMID: 17014941 DOI: 10.1016/j.envpol.2006.08.006] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2006] [Revised: 08/02/2006] [Accepted: 08/02/2006] [Indexed: 05/05/2023]
Abstract
Heavy metal contamination of metal-mined soils is a widespread problem in China. In the restored (over 20 years) Lipu manganese mineland, 36 plant species from 22 families were found colonizing, some of which were planted agronomic ones. Heavy metal concentrations in tailings were very high. Minesoils were basically unpolluted, but soils in the remaining mining area and in the vicinity of tailings dumps were polluted by Cd and Mn. Measurements of metal contents in dominant plants showed they were close to those of other mineland plants. Plants tended to have a higher Cd accumulation (as reflected by Biological Accumulation Coefficient) from soil, but have a higher Mn translocation (as indicated by Biological Transfer Coefficient) to aboveground parts. The Chinese chestnut and sugarcane cultivated on the reclaimed mineland were not safe for human consumption, and this agricultural restoration pattern should be carefully reconsidered.
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Affiliation(s)
- M S Li
- School of Environment and Resources, Guangxi Normal University, 15 Yucai Road, Guilin 541004, China.
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Abstract
AIM: To investigate the immune function of dendritic cells from both peripheral blood and operated tissues of esophageal carcinoma patients in order to find the relationship between the immune function of dendritic cells and the pathogenesis of esophageal carcinoma.
METHODS: The expression of CD83, CD80, and CD86 on the surface of dendritic cells cultured from the peripheral blood of patients was detected compared with that from health donors using flow cytometry. The ability of dendritic cells to induce T lymphocyte proliferation was evaluated by a liquid scintillation counter. The expression of CD80, CD86, CD83, and S-100 proteins was assessed in esophageal carcinoma tissues using immunohistochemical method.
RESULTS: Compared with those from healthy donors, dendirtic cells cultured from the peripheral blood of patients expressed lower CD80 and CD86. Furthermore, the ability of dendritic cells in patients to induce T lymphocyte proliferation was significantly lower than that of the control group. Compared with the control group, the positive expression ratio and frequencies of CD80, CD86, and S-100 in esophageal carcinoma tissues were significantly down regulated. The expression of CD83 was up-regulated in the pericancerous tissues, but no expression was found in the cancerous nodules.
CONCLUSION: The impaired immune function and the decreased number of dendritic cells cause pathogenesis and progression of esophageal carcinoma.
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Affiliation(s)
- Shen-Ren Chen
- The Second University Hospital of Shantou University Medical College, Dongsha Northern Road, Shantou 515041, Guangdong Province, China.
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Luo YP, Huang ZG, Qian HJ. [Tumor necrosis factor and interleukin 6 in acute leukemia]. Zhonghua Nei Ke Za Zhi 1993; 32:85-7. [PMID: 8404330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
In order to clarify the role of interleukin 6 (IL-6) and tumor necrosis factor alpha (TNF alpha) in the pathogenesis of acute leukemia, IL-6 and TNF alpha level was determined in patients with various types of acute leukemia. In comparison with normal subjects, IL-6 activity was significantly elevated in patients with ALL and ANLL (P < 0.01) and TNF alpha level increased in patients with ANLL (P < 0.05). The effect of IL-6 and TNF alpha on leukemia cell in vitro was also observed. The results indicated that IL-6 can promote the proliferation of leukemia cells, while TNF alpha can inhibit proliferation of leukemia cell in vitro. It is suggested that abnormal level of TNF alpha and IL-6 in patients with acute leukemia is probably related to the pathogenesis of acute leukemia.
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Affiliation(s)
- Y P Luo
- Department of Haematology, Chongqing Medical University
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