Wensheng Zhang

Beijing Normal University, Peping, Beijing, China

Are you Wensheng Zhang?

Claim your profile

Publications (7)26.49 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: Scope: Accumulation of glycolytic metabolite methylglyoxal (MG) in diabetic kidney is thought to contribute to the pathogenesis of nephropathy, either as a direct toxin or as a precursor for advanced glycation end products (AGEs). Using (+)-catechin (CE), a novel MG trapper, we investigated whether MG trapping is sufficient to prevent the progression of diabetic nephropathy in type 2 diabetic mice.Methods and results: CE markedly trapped exogenous MG in a time- and dose-dependent manner and formed mono-MG-CE and di-MG-CE adducts, which were characterized by HPLC-ESI-Q-TOFMS. In vivo, CE administration for 16 weeks significantly ameliorated renal dysfunction in type 2 diabetic db/db mice, partially due to MG trapping, which in turn inhibiting AGEs formation and lowering proinflammatory cytokines including tumor necrosis factor α (TNF-α) and IL-1β. Similarly, the MG trapping and cellular signaling inhibition effects of CE were observed in human endothelium-derived cells under high glucose conditions.Conclusion: CE might ameliorate renal dysfunction in diabetic mice as consequences of inhibiting AGEs formation and cutting off inflammatory pathway via MG trapping. Thus, CE may be a potential natural product as a MG scavenger against diabetes-related complications.This article is protected by copyright. All rights reserved
    Molecular Nutrition & Food Research 12/2014; 58(12). DOI:10.1002/mnfr.201400533 · 4.91 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: The receptor for advanced glycation end products (RAGE)-mediated signaling pathway is related to Aβ-induced pathogenic responses. Geniposide, a pharmacologically active component purified from gardenia fruit, could attenuate the oligomeric Aβ1-42-induced inflammatory response by blocking the ligation of Aβ to RAGE and suppressing the RAGE-mediated signaling in vitro. Here, we investigated whether geniposide can exert protective effects on the neuroinflammation and memory deficits in an Alzheimer's disease (AD) mouse model. The results indicate that geniposide treatment significantly suppresses RAGE-dependent signaling (activation of ERK and IκB/NF-κB), the production of tumor necrosis factor-α (TNF-α) and interleukin-1β (IL-1β) and cerebral Aβ accumulation in vivo. Furthermore, we demonstrate that geniposide augments synaptic plasticity by attenuating the Aβ-induced reduction of long-term potentiation and increasing the miniature excitatory postsynaptic current (mEPSC) amplitude and frequency in hippocampal neurons. In addition, the intragastric administration of geniposide improves learning and memory in APP/PS1 mice. Taken together, these studies indicate that geniposide has profound multifaceted neuroprotective effects in an AD mouse model. Geniposide demonstrates its neuroprotection by inhibiting inflammation via RAGE-dependent signaling, ameliorating amyloid pathology and improving cognition. Thus, geniposide may be a potential therapeutic agent for halting and preventing AD progression.
    Neuropharmacology 09/2014; 89. DOI:10.1016/j.neuropharm.2014.09.019 · 4.82 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Neurodegeneration and synaptic dysfunction observed in Alzheimer's disease (AD) have been associated with progressive decrease in neuronal activity. Here, we investigated the effects of Notoginsenoside R1 (NTR1), a major saponin isolated from Panax notoginseng, on neuronal excitability and assessed the beneficial effects of NTR1 on synaptic and memory deficits under the Aβ-enriched conditions in vivo and in vitro. We assessed the effects of NTR1 on neuronal excitability, membrane ion channel activity, and synaptic plasticity in acute hippocampal slices by combining electrophysiological extracellular and intracellular recording techniques. We found that NTR1 increased the membrane excitability of CA1 pyramidal neurons in hippocampal slices by lowering the spike threshold possibly through a mechanism involving in the inhibition of voltage-gated K(+) currents. In addition, NTR1 reversed Aβ1-42 oligomers-induced impairments in long term potentiation (LTP). Reducing spontaneous firing activity with 10 nM tetrodotoxin (TTX) abolished the protective effect of NTR1 against Aβ-induced LTP impairment. Finally, oral administration of NTR1 improved the learning performance of the APP/PS1 mouse model of AD. Our work reveals a novel mechanism involving in modulation of cell strength, which contributes to the protective effects of NTR1 against Aβ neurotoxicity.
    Scientific Reports 09/2014; 4:6352. DOI:10.1038/srep06352 · 5.58 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: The transient receptor potential ankyrin 1 (TRPA1) channel is well known as a sensor to environmental irritant compounds, cold, and endogenous proalgesic agents. TRPA1 is expressed on sensory neurons and is involved in pain modulation. Etodolac is a cyclooxygenase (COX)-2 inhibitor that belongs to the class of nonsteroidal anti-inflammatory drugs (NSAIDs). A recent study indicates that etodolac inhibits allyl isothiocyanate (AITC)-induced calcium influx in heterologous HEK293 cells and sensory neurons. To examine whether and how etodolac modulates the TRPA1 channels, we applied etodolac to TRPA1-transfected HEK293 cells or rat dorsal root ganglion (DRG) neurons and recorded the currents using the whole-cell patch clamp technique. We found that etodolac at higher doses could activate and then desensitize TRPA1 channels in heterologous expressing HEK293 cells as well as in DRG neurons. The etodolac-induced currents were significantly attenuated in cysteine residues mutated human TRPA1-transfected HEK293 cells. Interestingly, application of etodolac at drug plasma levels in clinical usage did not induce significant TRPA1 currents but reduced the subsequent AITC-induced currents to 25% in HEK293 cells expressing TRPA1. Moreover, no modulatory effect of etodolac on TRPA1 was detected in the cysteine mutant cells. These data indicate a novel mechanism of the anti-inflammatory and analgesic clinical effects of etodolac, which may be involved with its direct activation and the subsequent desensitization of TRPA1 through the covalent modification of cysteine residues. © 2013 Wiley Periodicals, Inc.
    Journal of Neuroscience Research 12/2013; 91(12). DOI:10.1002/jnr.23274 · 2.73 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Proinflammatory agents trypsin and mast cell tryptase cleave and activate protease-activated receptor-2 (PAR-2), which is expressed on sensory nerves and causes neurogenic inflammation. P2X3 is a subtype of the ionotropic receptors for adenosine 5'-triphosphate (ATP), and is mainly localized on nociceptors. Here, we show that a functional interaction of the PAR-2 and P2X3 in primary sensory neurons could contribute to inflammatory pain. PAR-2 activation increased the P2X3 currents evoked by α, β, methylene ATP in dorsal root ganglia (DRG) neurons. Application of inhibitors of either protein kinase C (PKC) or protein kinase A (PKA) suppressed this potentiation. Consistent with this, a PKC or PKA activator mimicked the PAR-2-mediated potentiation of P2X3 currents. In the in vitro phosphorylation experiments, application of a PAR-2 agonist failed to establish phosphorylation of the P2X3 either on the serine or the threonine site. In contrast, application of a PAR-2 agonist induced trafficking of the P2X3 from the cytoplasm to the plasma membrane. These findings indicate that PAR-2 agonists may potentiate the P2X3, and the mechanism of this potentiation is likely to be a result of translocation, but not phosphorylation. The functional interaction between P2X3 and PAR-2 was also confirmed by detection of the α, β, methylene-ATP-evoked extracellular signal-regulated kinases (ERK) activation, a marker of neuronal signal transduction in DRG neurons, and pain behavior. These results demonstrate a functional interaction of the protease signal with the ATP signal, and a novel mechanism through which protease released in response to tissue inflammation might trigger the sensation to pain through P2X3 activation.
    European Journal of Neuroscience 05/2012; 36(3):2293-301. DOI:10.1111/j.1460-9568.2012.08142.x · 3.67 Impact Factor
  • Source
    Lei Wang, Shijun Yan, Wensheng Zhang
    Molecular Neurodegeneration 02/2012; 7 Suppl 1(Suppl 1):S4. DOI:10.1186/1750-1326-7-S1-S4 · 5.29 Impact Factor
  • 01/2012; 42(11):883. DOI:10.1360/052012-204

Publication Stats

11 Citations
26.49 Total Impact Points

Institutions

  • 2012–2014
    • Beijing Normal University
      • • State Key Laboratory of Earth Surface Processes and Resource Ecology
      • • College of Resources Science and Technology
      Peping, Beijing, China