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Qiu Q, Zhang F, Wu J, Xu N, Liang M. Gingipains disrupt F-actin and cause osteoblast apoptosis via integrin β1. J Periodontal Res 2018; 53:762-776. [PMID: 29777544 DOI: 10.1111/jre.12563] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/16/2018] [Indexed: 12/24/2022]
Abstract
BACKGROUND AND OBJECTIVE The aim of this study was to explore the cellular mechanisms underlying gingipain-caused changes in cell morphology and apoptosis of osteoblasts. MATERIAL AND METHODS Human calvarial osteoblasts and mouse osteoblasts MC3T3-E1 were treated with gingipain extracts from Porphyromonas gingivalis stain W83. Apoptosis was detected with annexin V and propidium iodide flow cytometry analysis or terminal deoxynucleotidyl transferase mediated dUTP nick-end labeling staining. F-actin was determined by immunostaining. Western blotting was used to detect protein expression. Knocking down and overexpressing approaches were used to determine the role of integrin β1. RESULTS Osteoblasts exposed to gingipain extracts displayed increased apoptosis, accompanied by loss of F-actin integrity and cell shrinkage. The effects of gingipain extracts were abolished by the cysteine protease inhibitor N-tosyl-l-lysyl chloromethyl-ketone. Notably, gingipain extracts resulted in reduction of integrin β1, accompanied by diminished active RhoA whereas without effect on the total RhoA. Knockdown of integrin β1 resembled those seen in gingipain-treated osteoblasts. By contrast, the effects of gingipain extracts were abrogated by either overexpression of integrin β1 or presence of RhoA agonist CN03. CONCLUSION Gingipain-induced F-actin disruption and apoptosis are mediated by the degradation of integrin β1 and inhibition of RhoA activity, which account for osteoblast apoptosis.
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Zhang S, Zheng B, Wang T, Li A, Wan J, Qu J, Li CH, Li D, Liang M. NSs protein of severe fever with thrombocytopenia syndrome virus suppresses interferon production through different mechanism than Rift Valley fever virus. Acta Virol 2017; 61:289-298. [PMID: 28854793 DOI: 10.4149/av_2017_307] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Severe fever with thrombocytopenia syndrome virus (SFTSV) is a newly identified Phlebovirus that causes severe fever with thrombocytopenia syndrome. Our study demonstrated that SFTSV NSs functioned as IFN antagonist mainly by suppressing TBK1/IKKε-IRF3 signaling pathway. NSs interacted with and relocalized TANK-binding kinase 1 (TBK1) into NSs-induced cytoplasmic structures and this interaction could effectively inhibit downstream phosphorylation and dimerization of interferon regulatory factor 3 (IRF3), resulting in the suppression of antiviral signaling and IFN induction. Functional sites of SFTSV NSs binding with TBK1 were then studied and results showed that NSs had lost their IFN-inhibiting activity after deleting the 25 amino acids in N-terminal. Furthermore, the mechanism of Rift Valley fever virus (RVFV) NSs blocking IFN-β response were also investigated. Preliminary results showed that RVFV NSs proteins could neither interact nor co-localize with TBK1 in cytoplasm, but suppressed its expression levels, phosphorylation and dimerization of IRF3 in the subsequent steps, resulting in inhibition of the IFN-β production. Altogether, our data demonstrated the probable mechanism used by SFTSV to inhibit IFN responses which was different from RVFV and pointed toward a novel mechanism for RVFV suppressing IFN responses.
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Li Y, Xu X, Qin X, Wang B, Liang M, He M, Tang G, Lin Z. EFFECT OF FOLIC ACID THERAPY ON RENAL FUNCTION IN HYPERTENSIVE ADULTS. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.2650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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54
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Stagno JR, Liu Y, Bhandari YR, Conrad CE, Panja S, Swain M, Fan L, Nelson G, Li C, Wendel DR, White TA, Coe JD, Wiedorn MO, Knoska J, Oberthuer D, Tuckey RA, Yu P, Dyba M, Tarasov SG, Weierstall U, Grant TD, Schwieters CD, Zhang J, Ferré-D'Amaré AR, Fromme P, Draper DE, Liang M, Hunter MS, Boutet S, Tan K, Zuo X, Ji X, Barty A, Zatsepin NA, Chapman HN, Spence JCH, Woodson SA, Wang YX. Structures of riboswitch RNA reaction states by mix-and-inject XFEL serial crystallography. Acta Crystallogr A Found Adv 2017. [DOI: 10.1107/s0108767317099081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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55
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Lin N, Zhang Q, Xia X, Liang M, Zhang S, Zheng L, Cao Q, Ding Z. A highly zinc-selective ratiometric fluorescent probe based on AIE luminogen functionalized coordination polymer nanoparticles. RSC Adv 2017. [DOI: 10.1039/c6ra28551a] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
A highly zinc-selective ratiometric fluorescent probe was developed based on the cation exchange process of Tb-HDBB-CPNs with Zn2+.
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Wang YM, Zheng SX, Chang HI, Tsai HY, Liang M. Microwave-assisted synthesis of thermo- and pH-responsive antitumor drug carrier through reversible addition–fragmentation chain transfer polymerization. EXPRESS POLYM LETT 2017. [DOI: 10.3144/expresspolymlett.2017.29] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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57
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Wang Q, Yang H, Liu X, Dai L, Ma T, Qi J, Wong G, Peng R, Liu S, Li J, Li S, Song J, Liu J, He J, Yuan H, Xiong Y, Liao Y, Li J, Yang J, Tong Z, Griffin BD, Bi Y, Liang M, Xu X, Qin C, Cheng G, Zhang X, Wang P, Qiu X, Kobinger G, Shi Y, Yan J, Gao GF. Molecular determinants of human neutralizing antibodies isolated from a patient infected with Zika virus. Sci Transl Med 2016; 8:369ra179. [DOI: 10.1126/scitranslmed.aai8336] [Citation(s) in RCA: 163] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 08/26/2016] [Accepted: 10/28/2016] [Indexed: 01/10/2023]
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58
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Chen YJ, Wang HF, Liang M, Zou RC, Tang ZR, Wang JS. Upregulation of miR-3658 in bladder cancer and tumor progression. GENETICS AND MOLECULAR RESEARCH 2016; 15:gmr-15-gmr15049048. [PMID: 27820650 DOI: 10.4238/gmr15049048] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Despite increasing advances in surgical techniques and adjuvant chemotherapies, bladder cancer remains the ninth leading cause of male malignancy-associated deaths worldwide. Several microRNAs (miRNAs) have been identified to be closely associated with the progression and prognosis of, and response to treatments in various human cancers. However, few studies have investigated the role of miR-3658 in bladder cancer. In this study, we examined the expression of miR-3658 in 96 pairs of bladder cancer tissues and adjacent non-tumor tissues via quantitative reverse-transcription polymerase chain reaction. Results showed that expression of miR-3658 was up-regulated in the bladder cancer tissues as compared with that in the corresponding control tissues (4.15 ± 2.78 vs 2.17 ± 1.14; P < 0.0001). Furthermore, higher miR-3658 expression was significantly associated with lymph node invasion, distant metastasis, histological grade, TNM stage, and tumor recurrence in bladder cancer (all P < 0.0001). miR-3658 expression was not associated with other clinicopathological variables such as age, gender, tumor size, and number (all P > 0.05). Our study revealed that miR-3658 overexpression is involved in tumor progression of bladder cancer, indicating that the miRNA possesses prognostic values.
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Jeanblanc N, Hemken P, Rae T, Brophy S, Manetz S, Vainshtein I, Liang M, Choudhury P, Chang C, Streicher K, Greenlees L, Xiao X, Ranade K, Davis G. P114 Research use only (RUO) DPP-4 immunoassay. Ann Allergy Asthma Immunol 2016. [DOI: 10.1016/j.anai.2016.09.124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Liang M, Prendergast E, Rimel B, Leuchter R, Walsh C, Cass I, Karlan B, Li A. Antibiotic Use Negatively Influences Survival in Epithelial Ovarian Cancer: A Case for Studying the Microbiome. Gynecol Oncol 2016. [DOI: 10.1016/j.ygyno.2016.08.265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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61
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Liang M, Holzapfel M, Chang H, Lester J, Li A, Cass I, Rimel B, Karlan B, Leuchter R, Walsh C. Glasgow Prognostic Score Associated with Lower Rates of R0 Cytoreduction in Women with Stage III Serous Ovarian Cancer. Gynecol Oncol 2016. [DOI: 10.1016/j.ygyno.2016.08.304] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Liang M, Prendergast E, Staples J, Holschneider C, Cass I. Complete Pathologic Response at Interval Debulking Surgery Following Neoadjuvant Chemotherapy Predicts Improved Survival in Women with Advanced Epithelial Ovarian Cancer in a Multi-institutional Cohort. Gynecol Oncol 2016. [DOI: 10.1016/j.ygyno.2016.08.247] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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63
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Chen B, Zhou L, He J, Xiong W, Liu Y, Deng L, Xiang J, Yu Q, Liang M, Zhou X, Ding Z, Huang M, Ren L, Zhu J, Li L, Hou M, Lu Y. Neurocognitive Function and Quality of Life in EGFR-Mutated Non-Small Cell Lung Cancer Patients With Brain Metastases Treated With Icotinib and Whole-Brain Radiation: Results of a Phase 1 Trial. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Liang M, Lee MC, O'Neill J, Dickenson AH, Iannetti GD. Brain potentials evoked by intraepidermal electrical stimuli reflect the central sensitization of nociceptive pathways. J Neurophysiol 2016; 116:286-95. [PMID: 27098022 PMCID: PMC4969393 DOI: 10.1152/jn.00013.2016] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Accepted: 04/14/2016] [Indexed: 01/19/2023] Open
Abstract
Secondary mechanical punctate hyperalgesia is a cardinal sign of central sensitization (CS), an important mechanism of chronic pain. Our study demonstrates that hyperalgesia from intraepidermal electrical stimulation coexists with mechanical punctate hyperalgesia and elicits electroencephalographic (EEG) potentials that predict the occurrence of punctate hyperalgesia in a human experimental model of CS. These findings inform clinical development of EEG-based biomarkers of CS. Central sensitization (CS), the increased sensitivity of the central nervous system to somatosensory inputs, accounts for secondary hyperalgesia, a typical sign of several painful clinical conditions. Brain potentials elicited by mechanical punctate stimulation using flat-tip probes can provide neural correlates of CS, but their signal-to-noise ratio is limited by poor synchronization of the afferent nociceptive input. Additionally, mechanical punctate stimulation does not activate nociceptors exclusively. In contrast, low-intensity intraepidermal electrical stimulation (IES) allows selective activation of type II Aδ-mechano-heat nociceptors (II-AMHs) and elicits reproducible brain potentials. However, it is unclear whether hyperalgesia from IES occurs and coexists with secondary mechanical punctate hyperalgesia, and whether the magnitude of the electroencephalographic (EEG) responses evoked by IES within the hyperalgesic area is increased. To address these questions, we explored the modulation of the psychophysical and EEG responses to IES by intraepidermal injection of capsaicin in healthy human subjects. We obtained three main results. First, the intensity of the sensation elicited by IES was significantly increased in participants who developed robust mechanical punctate hyperalgesia after capsaicin injection (i.e., responders), indicating that hyperalgesia from IES coexists with punctate mechanical hyperalgesia. Second, the N2 peak magnitude of the EEG responses elicited by IES was significantly increased after the intraepidermal injection of capsaicin in responders only. Third, a receiver-operator characteristics analysis showed that the N2 peak amplitude is clearly predictive of the presence of CS. These findings suggest that the EEG responses elicited by IES reflect secondary hyperalgesia and therefore represent an objective correlate of CS.
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Kim M, Liang M, He Q, Wang J. A novel bioreactor to study the dynamics of co-culture systems. Biochem Eng J 2016. [DOI: 10.1016/j.bej.2015.11.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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66
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Lin N, Chen X, Yan S, Wang H, Lu Z, Xia X, Liang M, Wu YL, Zheng L, Cao Q, Ding Z. An aggregation-induced emission-based pH-sensitive fluorescent probe for intracellular acidity sensing. RSC Adv 2016. [DOI: 10.1039/c6ra01167e] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
An aggregation-induced emission based dual emission pH-sensitive fluorescent probe has been developed and applied for fluorescent visualization of intracellular acidity.
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67
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Moeller B, Liang M, Bobo W, Thakkar V, McCammon R, Gant D, Fraser R, Burri S. Rotational Peer Review: Prospective Evaluation of a Novel Physician Peer Review Model in Radiation Oncology. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.1807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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68
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Bufacchi RJ, Liang M, Griffin LD, Iannetti GD. A geometric model of defensive peripersonal space. J Neurophysiol 2015; 115:218-25. [PMID: 26510762 PMCID: PMC4760470 DOI: 10.1152/jn.00691.2015] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Accepted: 10/21/2015] [Indexed: 11/22/2022] Open
Abstract
Potentially harmful stimuli occurring within the defensive peripersonal space (DPPS), a protective area surrounding the body, elicit stronger defensive reactions. The spatial features of the DPPS are poorly defined and limited to descriptive estimates of its extent along a single dimension. Here we postulated a family of geometric models of the DPPS, to address two important questions with respect to its spatial features: What is its fine-grained topography? How does the nervous system represent the body area to be defended? As a measure of the DPPS, we used the strength of the defensive blink reflex elicited by electrical stimulation of the hand (hand-blink reflex, HBR), which is reliably modulated by the position of the stimulated hand in egocentric coordinates. We tested the goodness of fit of the postulated models to HBR data from six experiments in which we systematically explored the HBR modulation by hand position in both head-centered and body-centered coordinates. The best-fitting model indicated that 1) the nervous system's representation of the body area defended by the HBR can be approximated by a half-ellipsoid centered on the face and 2) the DPPS extending from this area has the shape of a bubble elongated along the vertical axis. Finally, the empirical observation that the HBR is modulated by hand position in head-centered coordinates indicates that the DPPS is anchored to the face. The modeling approach described in this article can be generalized to describe the spatial modulation of any defensive response.
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Zhou R, Wu Z, Jiang FL, Liang M. Comparison of gSSR and EST-SSR markers for analyzing genetic variability among tomato cultivars (Solanum lycopersicum L.). GENETICS AND MOLECULAR RESEARCH 2015; 14:13184-94. [PMID: 26535631 DOI: 10.4238/2015.october.26.14] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
In order to study genetic variability and develop better strategies for the utilization of 48 tomato cultivars from America, China, the Netherlands, and Portugal, genomic simple sequence repeat (gSSR) and EST-derived SSR (EST-SSR) markers were applied. In all, 15 of 82 gSSR and 18 of 115 EST-SSR markers showed polymorphic loci. There were 995 and 2072 clear fragments amplified by polymorphic gSSR and EST-SSR markers, respectively. The total and average number of alleles detected by EST-SSRs (75, 4.2) was more than gSSRs (54, 3.6) as a result of some multi-locus EST-SSRs. A lower polymorphism information content value was found in gSSRs (0.529) compared to EST-SSRs (0.620). Similarity coefficient matrixes of the 48 tomato cultivars were established based on the gSSRs and EST-SSRs, and UPGMA dendrograms were constructed from the gSSRs and EST-SSRs similarity coefficient matrixes. A high similarity was observed between the gSSRs and EST-SSRs dendrograms. Genetic variability of four tomato populations from different countries showed that the observed number of alleles and Nei's genetic diversity were highest in the American population, and the effective number of alleles was highest in the Dutch population. The estimated genetic structure showed some tomato cultivars from different countries shared a common genetic background, which might be related to gene flow. It was inferred that both gSSR and EST-SSR markers were effective to assess genetic variability of tomato cultivars, and the combination of both markers could be more effective for genetic diversity analysis in tomato.
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Xue J, Fu F, Liang M, Zhao C, Wang D, Wu Y. Ethyl Carbamate Production Kinetics during Wine Storage. S AFR J ENOL VITIC 2015. [DOI: 10.21548/36-2-961] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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71
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Song X, Pak M, Chavez C, Liang M, Lu H, Blake-Haskins A, Robbins P, Jin X, Gupta A, Roskos L, Narwal R. 203 Population pharmacokinetics of MEDI4736, a fully human antiprogrammed death ligand 1 (PD-L1) monoclonal antibody, in patients with advanced solid tumors. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)30091-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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72
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Moayedi M, Liang M, Sim AL, Hu L, Haggard P, Iannetti GD. Laser-Evoked Vertex Potentials Predict Defensive Motor Actions. Cereb Cortex 2015; 25:4789-98. [PMID: 26250779 PMCID: PMC4635919 DOI: 10.1093/cercor/bhv149] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
The vertex potential is the largest response that can be recorded in the electroencephalogram of an awake, healthy human. It is elicited by sudden and intense stimuli, and is composed by a negative–positive deflection. The stimulus properties that determine the vertex potential amplitude have been well characterized. Nonetheless, its functional significance remains elusive. The dominant interpretation is that it reflects neural activities related to the detection of salient stimuli. However, given that threatening stimuli elicit both vertex potentials and defensive movements, we hypothesized that the vertex potential is related to the execution of defensive actions. Here, we directly compared the salience and motoric interpretations by investigating the relationship between the amplitude of laser-evoked potentials (LEPs) and the response time of movements with different defensive values. First, we show that a larger LEP negative wave (N2 wave) predicts faster motor response times. Second, this prediction is significantly stronger when the motor response is defensive in nature. Third, the relation between the N2 wave and motor response time depends not only on the kinematic form of the movement, but also on whether that kinematic form serves as a functional defense of the body. Therefore, the N2 wave of the LEP encodes key defensive reactions to threats.
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Galli L, Son SK, Klinge M, Bajt S, Barty A, Bean R, Betzel C, Beyerlein KR, Caleman C, Doak RB, Duszenko M, Fleckenstein H, Gati C, Hunt B, Kirian RA, Liang M, Nanao MH, Nass K, Oberthür D, Redecke L, Shoeman R, Stellato F, Yoon CH, White TA, Yefanov O, Spence J, Chapman HN. Electronic damage in S atoms in a native protein crystal induced by an intense X-ray free-electron laser pulse. STRUCTURAL DYNAMICS (MELVILLE, N.Y.) 2015; 2:041703. [PMID: 26798803 PMCID: PMC4711609 DOI: 10.1063/1.4919398] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Accepted: 04/17/2015] [Indexed: 05/07/2023]
Abstract
Current hard X-ray free-electron laser (XFEL) sources can deliver doses to biological macromolecules well exceeding 1 GGy, in timescales of a few tens of femtoseconds. During the pulse, photoionization can reach the point of saturation in which certain atomic species in the sample lose most of their electrons. This electronic radiation damage causes the atomic scattering factors to change, affecting, in particular, the heavy atoms, due to their higher photoabsorption cross sections. Here, it is shown that experimental serial femtosecond crystallography data collected with an extremely bright XFEL source exhibit a reduction of the effective scattering power of the sulfur atoms in a native protein. Quantitative methods are developed to retrieve information on the effective ionization of the damaged atomic species from experimental data, and the implications of utilizing new phasing methods which can take advantage of this localized radiation damage are discussed.
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Eidet J, Utheim T, Lyberg T, Mikkelsen K, Liang M, Hollan I. FRI0082 Serum Level of Adiponectin in Rheumatoid Arthritis (RA) is Associated with Coronary Artery Disease. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.3135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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75
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Liang M, Liang J, Puri A, Pasupati S, Devlin G. Medium- to long-term outcomes in percutaneous coronary intervention in the very elderly population. Eur Geriatr Med 2015. [DOI: 10.1016/j.eurger.2015.01.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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76
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Liang M, Wen J, Dong Q, Zhao LG, Shi BK. Testicular hypofunction caused by activating p53 expression induced by reactive oxygen species in varicocele rats. Andrologia 2015; 47:1175-82. [PMID: 25611575 DOI: 10.1111/and.12400] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/24/2014] [Indexed: 12/27/2022] Open
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Liang M, Sun J, Rong J, Xuan F, Zhao L, Wang X, Li F, Yao T, Han Y. ASSA14-12-10 Mobile minimally invasive interventional shelter: A new answer to pre-hospital care of large arterial trauma. BRITISH HEART JOURNAL 2015. [DOI: 10.1136/heartjnl-2014-307109.99] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Tian J, Xiang L, Liang M, Sun J, Rong J, Xuan F, Zhao L, Han Y. ASSA14-12-06 Effects of Internal Iliac Artery Embolization to Systemic Inflammatory Response Syndrome in Simulated-Pelvic-Fracture Dog Combined with Massive Bleeding. BRITISH HEART JOURNAL 2015. [DOI: 10.1136/heartjnl-2014-307109.95] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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79
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Xuan F, Zhao L, Rong J, Liang M, Sun J, Han Y. ASSA14-12-07 In vitroand in vivobiocompatibility evoluation of New vascular embolization agent:. BRITISH HEART JOURNAL 2015. [DOI: 10.1136/heartjnl-2014-307109.96] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Yao T, Rong J, Liang M, Sun J, Xuan F, Zhao L, Wang X, Li F, Wang G, Han Y. ASSA14-12-09 Emergency treatment of splenic injury in a novel mobile minimally invasive interventional shelter following disaster: a feasibility study. BRITISH HEART JOURNAL 2015. [DOI: 10.1136/heartjnl-2014-307109.98] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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81
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Rong JJ, Liang M, Xuan FQ, Sun JY, Zhao LJ, Zhen HZ, Tian XX, Liu D, Zhang QY, Peng CF, Yao TM, Li F, Wang XZ, Han YL, Yu WT. ASSA14-12-08 POLY (ALGINATE-CALCIUM) MICROSPHERES LOADED WITH THROMBIN: A NEW HEMOSTATIC EMBOLIC MATERIAL FORTRANSCATHETERARTERIAL EMBOLIZATION. BRITISH HEART JOURNAL 2015. [DOI: 10.1136/heartjnl-2014-307109.97] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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82
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Zhou L, He J, Xiong W, Yu Q, Xiang J, Liang M, Xue J, Liu Y, Ding Z, Gong Y, Huang M, Zhu J, Li L, Wang Y, Hou M, Ren L, Lu Y. Phase 1 Trial of Icotinib Combined With Whole-Brain Radiation Therapy for EGFR-Mutated Non-Small Cell Lung Cancer Patients With Brain Metastases: Updated Results. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.08.218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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83
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Lai I, Shiau C, Hu Y, Wong T, Ho D, Chang K, Chang F, Liang M, Lee Y, Chen H, Yen S, Chen Y. Treatment Results and Prognostic Factors for Intracranial Non-germinomatous Germ Cell Tumors: Single Institute Experience. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.2107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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84
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Rosen M, Liang M, McCann G, Clements A, Cohn D, O'Malley D, Fowler J, Salani R, Backes F. Risk of complications after robotic hysterectomy for endometrial cancer in obese patients with preoperative comorbidities. Gynecol Oncol 2014. [DOI: 10.1016/j.ygyno.2014.03.413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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85
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Huber GM, Blok HP, Butuceanu C, Gaskell D, Horn T, Mack DJ, Abbott D, Aniol K, Anklin H, Armstrong C, Arrington J, Assamagan K, Avery S, Baker OK, Barrett B, Beise EJ, Bochna C, Boeglin W, Brash EJ, Breuer H, Chang CC, Chant N, Christy ME, Dunne J, Eden T, Ent R, Fenker H, Gibson EF, Gilman R, Gustafsson K, Hinton W, Holt RJ, Jackson H, Jin S, Jones MK, Keppel CE, Kim PH, Kim W, King PM, Klein A, Koltenuk D, Kovaltchouk V, Liang M, Liu J, Lolos GJ, Lung A, Margaziotis DJ, Markowitz P, Matsumura A, McKee D, Meekins D, Mitchell J, Miyoshi T, Mkrtchyan H, Mueller B, Niculescu G, Niculescu I, Okayasu Y, Pentchev L, Perdrisat C, Pitz D, Potterveld D, Punjabi V, Qin LM, Reimer PE, Reinhold J, Roche J, Roos PG, Sarty A, Shin IK, Smith GR, Stepanyan S, Tang LG, Tadevosyan V, Tvaskis V, van der Meer RLJ, Vansyoc K, Van Westrum D, Vidakovic S, Volmer J, Vulcan W, Warren G, Wood SA, Xu C, Yan C, Zhao WX, Zheng X, Zihlmann B. Separated response function ratios in exclusive, forward π(±) electroproduction. PHYSICAL REVIEW LETTERS 2014; 112:182501. [PMID: 24856691 DOI: 10.1103/physrevlett.112.182501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Indexed: 06/03/2023]
Abstract
The study of exclusive π(±) electroproduction on the nucleon, including separation of the various structure functions, is of interest for a number of reasons. The ratio RL=σL(π-)/σL(π+) is sensitive to isoscalar contamination to the dominant isovector pion exchange amplitude, which is the basis for the determination of the charged pion form factor from electroproduction data. A change in the value of RT=σT(π-)/σT(π+) from unity at small -t, to 1/4 at large -t, would suggest a transition from coupling to a (virtual) pion to coupling to individual quarks. Furthermore, the mentioned ratios may show an earlier approach to perturbative QCD than the individual cross sections. We have performed the first complete separation of the four unpolarized electromagnetic structure functions above the dominant resonances in forward, exclusive π(±) electroproduction on the deuteron at central Q(2) values of 0.6, 1.0, 1.6 GeV(2) at W=1.95 GeV, and Q(2)=2.45 GeV(2) at W=2.22 GeV. Here, we present the L and T cross sections, with emphasis on RL and RT, and compare them with theoretical calculations. Results for the separated ratio RL indicate dominance of the pion-pole diagram at low -t, while results for RT are consistent with a transition between pion knockout and quark knockout mechanisms.
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86
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Liu Q, Qiu J, Liang M, Golinski J, van Leyen K, Jung JE, You Z, Lo EH, Degterev A, Whalen MJ. Akt and mTOR mediate programmed necrosis in neurons. Cell Death Dis 2014; 5:e1084. [PMID: 24577082 PMCID: PMC3944276 DOI: 10.1038/cddis.2014.69] [Citation(s) in RCA: 114] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Revised: 01/05/2014] [Accepted: 01/28/2014] [Indexed: 12/23/2022]
Abstract
Necroptosis is a newly described form of regulated necrosis that contributes to neuronal death in experimental models of stroke and brain trauma. Although much work has been done elucidating initiating mechanisms, signaling events governing necroptosis remain largely unexplored. Akt is known to inhibit apoptotic neuronal cell death. Mechanistic target of rapamycin (mTOR) is a downstream effector of Akt that controls protein synthesis. We previously reported that dual inhibition of Akt and mTOR reduced acute cell death and improved long term cognitive deficits after controlled-cortical impact in mice. These findings raised the possibility that Akt/mTOR might regulate necroptosis. To test this hypothesis, we induced necroptosis in the hippocampal neuronal cell line HT22 using concomitant treatment with tumor necrosis factor α (TNFα) and the pan-caspase inhibitor N-benzyloxycarbonyl-Val-Ala-Asp-fluoromethylketone. TNFα/zVAD treatment induced cell death within 4 h. Cell death was preceded by RIPK1–RIPK3–pAkt assembly, and phosphorylation of Thr-308 and Thr473 of AKT and its direct substrate glycogen synthase kinase-3β, as well as mTOR and its direct substrate S6 ribosomal protein (S6), suggesting activation of Akt/mTOR pathways. Pretreatment with Akt inhibitor viii and rapamycin inhibited Akt and S6 phosphorylation events, mitochondrial reactive oxygen species production, and necroptosis by over 50% without affecting RIPK1–RIPK3 complex assembly. These data were confirmed using small inhibitory ribonucleic acid-mediated knockdown of AKT1/2 and mTOR. All of the aforementioned biochemical events were inhibited by necrostatin-1, including Akt and mTOR phosphorylation, generation of oxidative stress, and RIPK1–RIPK3–pAkt complex assembly. The data suggest a novel, heretofore unexpected role for Akt and mTOR downstream of RIPK1 activation in neuronal cell death.
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87
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Minter RR, Cohen ES, Wang B, Liang M, Vainshtein I, Rees G, Eghobamien L, Harrison P, Sims DA, Matthews C, Wilkinson T, Monk P, Drinkwater C, Fabri L, Nash A, McCourt M, Jermutus L, Roskos L, Anderson IK, Sleeman MA. Protein engineering and preclinical development of a GM-CSF receptor antibody for the treatment of rheumatoid arthritis. Br J Pharmacol 2014; 168:200-11. [PMID: 22913645 DOI: 10.1111/j.1476-5381.2012.02173.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2011] [Revised: 05/22/2012] [Accepted: 07/16/2012] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND AND PURPOSE For antibody therapies against receptor targets, in vivo outcomes can be difficult to predict because of target-mediated clearance or antigen 'sink' effects. The purpose of this work was to engineer an antibody to the GM-CSF receptor α (GM-CSFRα) with pharmacological properties optimized for chronic, s.c. treatment of rheumatoid arthritis (RA) patients. EXPERIMENTAL APPROACH We used an in silico model of receptor occupancy to guide the target affinity and a combinatorial phage display approach for affinity maturation. Mechanism of action and internalization assays were performed on the optimized antibody in vitro before refining the modelling predictions of the eventual dosing in man. Finally, in vivo pharmacology studies in cynomolgus monkeys were carried out to inform the predictions and support future clinical development. KEY RESULTS Antibody potency was improved 8600-fold, and the target affinity was reached. The refined model predicted pharmacodynamic effects at doses as low as 1 mg kg(-1) and a study in cynomolgus monkeys confirmed in vivo efficacy at 1 mg kg(-1) dosing. CONCLUSIONS AND IMPLICATIONS This rational approach to antibody drug discovery enabled the isolation of a potent molecule compatible with chronic, s.c. self-administration by RA patients. We believe this general approach enables the development of optimal biopharmaceuticals.
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88
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Ma W, Liang M, Guan L, Xu M, Wen X, Deng X, Chen J. Population Structures of 'Candidatus Liberibacter asiaticus' in Southern China. PHYTOPATHOLOGY 2014; 104:158-162. [PMID: 24093922 DOI: 10.1094/phyto-04-13-0110-r] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Huanglongbing (HLB) is a highly detrimental citrus disease associated with 'Candidatus Liberibacter asiaticus', a nonculturable alpha-proteobacterium. Characterization of the bacterial populations is important for development of disease management strategies. In this study, the 'Ca. L. asiaticus' populations in eight provinces in southern China where HLB is endemic were analyzed based on tandem repeat number (TRN) variations in a previously characterized genomic locus CLIBASIA_01645. Of the 224 HLB samples collected, 175 (78.3%) samples yielded single polymerase chain reaction (PCR) amplicons (the single amplicon group, SAG) and 49 (21.7%) samples produced multiple PCR amplicons (the multiple amplicon group, MAG). Variations in SAG are summarized by Nei's diversity index (H) and ratio of TRN ≤ 10/TRN > 10 genotypes (R10). Variations in the MAG are described by the percentage of occurrence (PMAG). At an orchard-level comparison, the 'Ca. L. asiaticus' population from a Guangdong orchard (n = 24) showed H = 0.50, R10 = 23, and PMAG = 0, significantly different from that of the non-Guangdong orchards in Yunnan (n = 23), H = 0.83, R10 = 2.3, and PMAG = 11.5, and in Hainan (n = 35), H = 0.88, R10 = 1.5, and PMAG = 16.7. In a region-level consideration, the Guangdong 'Ca. L. asiaticus' population (n = 78) was H = 0.77, R10 = 25, and PMAG = 1.3, whereas the non-Guangdong population (n = 84) was H = 0.91, R10 = 1.6, and PMAG = 26.9. Overall, significant differences were observed between the 'Ca. L. asiaticus' population from Guangdong Province and those from the other provinces. A strong aggregation of TRN = 6, 7, and 8 genotypes is characteristic to the 'Ca. L. asiaticus' population in Guangdong. Referenced to genome annotation, we propose that rearrangement of tandem repeats at locus CLIBASIA_01645 could be associated with bacterial environmental adaptation.
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Liang M, Mouraux A, Hu L, Iannetti GD. Primary sensory cortices contain distinguishable spatial patterns of activity for each sense. Nat Commun 2013; 4:1979. [PMID: 23752667 PMCID: PMC3709474 DOI: 10.1038/ncomms2979] [Citation(s) in RCA: 104] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Accepted: 05/07/2013] [Indexed: 11/09/2022] Open
Abstract
Whether primary sensory cortices are essentially multisensory or whether they respond to only one sense is an emerging debate in neuroscience. Here we use a multivariate pattern analysis of functional magnetic resonance imaging data in humans to demonstrate that simple and isolated stimuli of one sense elicit distinguishable spatial patterns of neuronal responses, not only in their corresponding primary sensory cortex, but in other primary sensory cortices. These results indicate that primary sensory cortices, traditionally regarded as unisensory, contain unique signatures of other senses and, thereby, prompt a reconsideration of how sensory information is coded in the human brain. Human primary sensory cortices are traditionally regarded as being able to process only one sensory modality. Liang and colleagues use brain imaging to show that, as well as being processed in typically corresponding cortical areas, different sensory modalities are also processed in atypical cortical areas.
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90
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Liang M, Rosen M, Rath K, Clements A, Backes F, Eisenhauer E, Salani R, O'Malley D, Fowler J, Cohn D. Predicting patients requiring prolonged hospitalization after robotic surgery for the management of endometrial cancer: An opportunity for improvement. Gynecol Oncol 2013. [DOI: 10.1016/j.ygyno.2013.07.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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91
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Hu L, Valentini E, Zhang ZG, Liang M, Iannetti GD. The primary somatosensory cortex contributes to the latest part of the cortical response elicited by nociceptive somatosensory stimuli in humans. Neuroimage 2013; 84:383-93. [PMID: 24001456 DOI: 10.1016/j.neuroimage.2013.08.057] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2013] [Revised: 08/14/2013] [Accepted: 08/22/2013] [Indexed: 12/26/2022] Open
Abstract
Nociceptive laser pulses elicit temporally-distinct cortical responses (the N1, N2 and P2 waves of laser-evoked potentials, LEPs) mainly reflecting the activity of the primary somatosensory cortex (S1) contralateral to the stimulated side, and of the bilateral operculoinsular and cingulate cortices. Here, by performing two different EEG experiments and applying a range of analysis approaches (microstate analysis, scalp topography, single-trial estimation), we describe a distinct component in the last part of the human LEP response (P4 wave). We obtained three main results. First, the LEP is reliably decomposed in four main and distinct functional microstates, corresponding to the N1, N2, P2, and P4 waves, regardless of stimulus territory. Second, the scalp and source configurations of the P4 wave follow a clear somatotopical organization, indicating that this response is likely to be partly generated in contralateral S1. Third, single-trial latencies and amplitudes of the P4 are tightly coupled with those of the N1, and are similarly sensitive to experimental manipulations (e.g., to crossing the hands over the body midline), suggesting that the P4 and N1 may have common neural sources. These results indicate that the P4 wave is a clear and distinct LEP component, which should be considered in LEP studies to achieve a comprehensive understanding of the brain response to nociceptive stimulation.
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92
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Kajiya T, Liang M, Low AF, Chan MY, Lee CH, Tay E, Chan KH, Richards AM, Tan HC. Difference in clinical outcomes between patients who underwent left main stenting during elective versus emergency setting. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht309.p3070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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93
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Starodub D, Aquila A, Bajt S, Barthelmess M, Barty A, Bostedt C, Bozek JD, Coppola N, Doak RB, Epp SW, Erk B, Foucar L, Gumprecht L, Hampton CY, Hartmann A, Hartmann R, Holl P, Kassemeyer S, Kimmel N, Laksmono H, Liang M, Loh ND, Lomb L, Martin AV, Nass K, Reich C, Rolles D, Rudek B, Rudenko A, Schulz J, Shoeman RL, Sierra RG, Soltau H, Steinbrener J, Stellato F, Stern S, Weidenspointner G, Frank M, Ullrich J, Strüder L, Schlichting I, Chapman HN, Spence JCH, Bogan MJ. Single-particle structure determination by correlations of snapshot X-ray diffraction patterns. Nat Commun 2013; 3:1276. [PMID: 23232406 DOI: 10.1038/ncomms2288] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2012] [Accepted: 11/14/2012] [Indexed: 11/09/2022] Open
Abstract
Diffractive imaging with free-electron lasers allows structure determination from ensembles of weakly scattering identical nanoparticles. The ultra-short, ultra-bright X-ray pulses provide snapshots of the randomly oriented particles frozen in time, and terminate before the onset of structural damage. As signal strength diminishes for small particles, the synthesis of a three-dimensional diffraction volume requires simultaneous involvement of all data. Here we report the first application of a three-dimensional spatial frequency correlation analysis to carry out this synthesis from noisy single-particle femtosecond X-ray diffraction patterns of nearly identical samples in random and unknown orientations, collected at the Linac Coherent Light Source. Our demonstration uses unsupported test particles created via aerosol self-assembly, and composed of two polystyrene spheres of equal diameter. The correlation analysis avoids the need for orientation determination entirely. This method may be applied to the structural determination of biological macromolecules in solution.
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Mazhar J, Killion B, Liang M, Lee M, Devlin G. Chest Pain Unit (CPU) in the Management of Low to Intermediate Risk Acute Coronary Syndrome: A Tertiary Hospital Experience from New Zealand. Heart Lung Circ 2013; 22:110-5. [DOI: 10.1016/j.hlc.2012.09.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2011] [Revised: 08/28/2012] [Accepted: 09/05/2012] [Indexed: 11/26/2022]
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95
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Liang M, Al-Sinan A, Webb I, Larsen P, Harding S. Current Universal Definition of Myocardial Infarction Fails to Reproducibly Define Periprocedural Myocardial Infarction. Heart Lung Circ 2013. [DOI: 10.1016/j.hlc.2013.05.083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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96
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Liang M, Lu Y, Sun L, Xu X, Wang P, Liu G, Li C. Investigation on Recrystallization of Cu-Nb Micro-composites by the Method of Resistance. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.phpro.2013.04.063] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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97
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Yao J, Xiong M, Tang B, Chen G, Liang M, Ma X, Wang Z, Wu Z. Simvastatin attenuates pulmonary vascular remodelling by down-regulating matrix metalloproteinase-1 and -9 expression in a carotid artery-jugular vein shunt pulmonary hypertension model in rats. Eur J Cardiothorac Surg 2012; 42:e121-7. [DOI: 10.1093/ejcts/ezs445] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Peiguo Z, Shijie Z, Liang M. Chimerism but not neonatal antigen exposure induces transplant tolerance. Scand J Immunol 2012; 76:108-12. [PMID: 22537091 DOI: 10.1111/j.1365-3083.2012.02711.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Acquired transplant tolerance could be readily induced during foetal or neonatal period through donor cell infusion, but it is not the case in adults. This phenomenon has been attributed to the variation of immune system development in neonatal and adult periods. To investigate the role of immature immune system and chimerism in neonatal transplant tolerance, irradiated spleen cells or cell fraction from F1 (BALB/c × C57BL/6) or GFP-F1 mice were injected intravenously into neonatal C57BL/6 mice to induce tolerance. Irradiated cells or cell fraction could not induce chimerism and transplant tolerance in neonatal mice, even increasing the dose of donor cells to 5 × 10(7). Living donor cells induced tolerance in neonatal mice, and the quantity of living cells was correlated with the degree of chimerism and tolerance. At the amount of 3 × 10(7) F1 spleen cells, skin grafts were survived permanently in more than 80% of treated mice. However, the amount of 0.7 × 10(7) F1 spleen cells could only slightly prolong allografts' survival. The more donor cells were infused, the higher level of chimerism was achieved, and the higher frequency of alloreactive T cells was deleted. Chimerism is prerequisite for the induction and maintenance of tolerance. Chimerism in long-term tolerant mice was significantly higher than that in chronic graft rejected mice, with 6.48 ± 4.02% versus 1.41 ± 0.77%. It implies that transplant tolerance depends on the establishment of chimerism, but not on antigen exposure to immature immune system in foetus or neonates.
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Loh ND, Hampton CY, Martin AV, Starodub D, Sierra RG, Barty A, Aquila A, Schulz J, Lomb L, Steinbrener J, Shoeman RL, Kassemeyer S, Bostedt C, Bozek J, Epp SW, Erk B, Hartmann R, Rolles D, Rudenko A, Rudek B, Foucar L, Kimmel N, Weidenspointner G, Hauser G, Holl P, Pedersoli E, Liang M, Hunter MS, Gumprecht L, Coppola N, Wunderer C, Graafsma H, Maia FRNC, Ekeberg T, Hantke M, Fleckenstein H, Hirsemann H, Nass K, White TA, Tobias HJ, Farquar GR, Benner WH, Hau-Riege SP, Reich C, Hartmann A, Soltau H, Marchesini S, Bajt S, Barthelmess M, Bucksbaum P, Hodgson KO, Strüder L, Ullrich J, Frank M, Schlichting I, Chapman HN, Bogan MJ. Erratum: Fractal morphology, imaging and mass spectrometry of single aerosol particles in flight. Nature 2012. [DOI: 10.1038/nature11426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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100
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Liu R, Su R, Liang M, Huang R, Wang M, Qi W, He Z. Physicochemical Strategies for Inhibition of Amyloid Fibril Formation: An Overview of Recent Advances. Curr Med Chem 2012; 19:4157-74. [DOI: 10.2174/092986712802430018] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2012] [Revised: 06/05/2012] [Accepted: 06/05/2012] [Indexed: 11/22/2022]
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