Xueguang Liu

Fudan University, Shanghai, Shanghai Shi, China

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Publications (5)6.55 Total impact

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    ABSTRACT: To discuss the mechanism of Yiqiyangyin recipe in rats with adriamycin (ADR)-induced nephropathy. We randomly divided 30 Sprague-Dawley rats into 5 groups: control, model, glucocorticoid, Chinese herb, and Chinese herb plus glucocorticoid groups. The 24-h urine volume was collected on days 7, 14, 21, and 28 after ADR injection, and all rats were killed on day 28. We measured the 24-h levels of urinary protein, serum cholesterol, and serum triglycerides, and renal function of all rats by using routine biochemical methods. Pathological changes in the rat kidneys were observed under light and electron microscopes. Heparanase (HPA) mRNA expression levels were measured using real-time fluorescence-quantitative polymerase chain reaction. Urine levels of HPA in all groups were measured using enzyme-linked immunosorbent assay. The expression of nephrin was detected by immunohistochemical staining and quantitatively analyzed using Motic image analysis 3.2 software. The levels of urinary protein and serum triglycerides and cholesterol in rats with ADR-induced nephropathy increased on day 14. The serum albumin levels simultaneously decreased. All the changes reached the peak on day 28. Examination under the light microscope showed inflammatory cells and slight fibroplasia in the renal interstitium in the model group, but fewer inflammatory cells were observed in the intervention groups than those in the model group. Examination under the electron microscope showed extensive fusion of foot processes in ADR rats. HPA mRNA expression was higher in the model group than that in the control group. The HPA mRNA levels in the intervention groups, especially in the Chinese herb group, and Chinese herb plus glucocorticoid group were significantly lower than the level in the model group. The HPA expression levels correlated significantly with the proteinuria level. No significant difference was found in the HPA level in urine between the intervention groups and the model group, whereas the model group had a higher urinary HPA level than the control group. Nephrin mRNA expression levels in the model group were higher than those in the control group. Nephrin mRNA expression levels were significantly lower in the intervention groups than that in the model group, especially the Chinese herb plus glucocorticoid group. Compared with the control group, the model group showed increased nephrin expression in the kidney. Nephrin levels in the other groups, especially in the Chinese herb plus glucocorticoid group, were significantly lower than that in the model group. The nephrin levels in the kidney were negatively correlated with the proteinuria level. Yiqiyangyin recipe could attenuate foot process injury particularly in combination with a steroid reduce the development of proteinuria possibly by inhibition of HPA in the kidney, and regulate the expression of nephrin in rats with ADR-induced nephropathy. Our study showed that treatment with Yiqiyangyin recipe plus glucocorticoid was better than a singular intervention, and we explored the pharmacological mechanism of this combination by biochemical and molecular biological analysis to provide a basis for clinical application.
    Journal of Traditional Chinese Medicine 06/2013; 33(3):334-42. DOI:10.1016/S0254-6272(13)60175-2 · 0.72 Impact Factor
  • Xueguang Liu · Hong Liu · Zhonghua Zhao · Zhigang Zhang · Xiaoqiang Ding ·
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    ABSTRACT: Fibrillary glomerulonephritis (FGN) is a morphologically defined entity characterized by glomerular accumulations of non-branching, randomly arranged fibrils; these differ from amyloid fibrils by their larger size and lack of reactivity with Congo red and other amyloid-specific dyes. FGN is a rare disease and may mimic membranous nephropathy under routine light microscopy and immunohistochemistry. However, electron microscopy shows the fibrillary nature of these glomerular deposits. We report a rare case of membranous nephropathy complicated by fibrillary deposits in a 60-year-old man with a history of bone tuberculosis.
    International Urology and Nephrology 07/2012; 45(5). DOI:10.1007/s11255-012-0236-7 · 1.52 Impact Factor
  • Xueguang Liu · Zuoqin Yan · Liang Huang · Muyi Guo · Zhigang Zhang · Changan Guo ·
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    ABSTRACT: Heat shock protein (Hsp) 90 is a molecular chaperone that maintains the active conformation and function of numerous client oncoproteins in cancer cells. Hsp90 has also been detected on the plasma membrane of cells, and its expression has been suggested to correlate with metastatic potential. We studied the PC3 cell line, which is a highly invasive human prostate cancer cell line, and confirmed that Hsp90 is present on the cell surface of PC3 cells. Interestingly, cell surface Hsp90 was also specifically localized at the leading edge of migrating cells. By using a specific antibody that inhibited cell surface Hsp90, adhesion and invasion of PC3 cells were significantly suppressed in vitro. Concomitantly with these findings, we demonstrated that the inhibition of cell surface Hsp90 not only inhibited the FN-dependent association between FAK, c-Src and integrin β1, but also significantly inhibited the phosphorylation of FAK and c-Src, as well as their downstream targets paxillin and p130Cas. Additionally, the Hsp90 antibody reversed cell invasion stimulated by overexpression of FAK. These data indicate that cell surface Hsp90 is involved in prostate cancer cell invasion through the integrin β1/FAK/c-Src signaling pathway. Our study provides new insights into the mechanisms of cell surface Hsp90 in cancer invasion. These results suggest that molecular targeting of cell surface Hsp90 may therefore be a novel target for the effective treatment of metastatic prostate cancer.
    Oncology Reports 03/2011; 25(5):1343-51. DOI:10.3892/or.2011.1202 · 2.30 Impact Factor
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    Xueguang Liu · Biyun Wang · Xuejun Ma · Ye Guo ·
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    ABSTRACT: Nuclear factor-kappaB (NF-kappaB) activation has been identified in a variety of solid tumors and lymphoid malignancies. The aim of our study was to determine the expression status and clinical significance of NF-kappaB in extranodal natural killer (NK)/T-cell lymphoma, nasal type. Tumor specimens from 23 patients with previously untreated NK/T-cell lymphoma initially treated with cyclophosphamide, vincristine, doxorubicin and prednisone (CHOP) or CHOP-based chemotherapy were examined by immunohistochemistry for three NF-kappaB subunits (p65, p50 and p52), which are involved in either the canonical or alternative pathway. None of the cases could be detected with p65 or p50 nuclear staining. On the other hand, 15 (65.2%) cases had p52 nuclear staining, suggesting NF-kappaB activation through the alternative pathway. All major clinical characteristics were balanced between NF-kappaB p52-positive and -negative patients. The objective response rate achieved in NF-kappaB-positive patients was significantly lower than that in negative patients (33.3% vs. 87.5%, P = 0.027). At a median follow-up of 25 months, 8 (53.3%) of 15 NF-kappaB-positive patients had died compared with none of 8 NF-kappaB-negative patients (P = 0.041). In a multivariate analysis, NF-kappaB status and stage were identified to be independent prognostic factors. Our results suggest that NF-kappaB activation through the alternative pathway is frequently observed in NK/T-cell lymphoma and associated with chemoresistance and poor survival.
    Japanese Journal of Clinical Oncology 05/2009; 39(7):418-24. DOI:10.1093/jjco/hyp037 · 2.02 Impact Factor
  • Xueguang Liu · Zhigang Zhang · Xiurong Zhang · Hongguang Zhu · Qi Chen · Muyi Guo ·
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    ABSTRACT: To observe the localization of adrenomedullin (AM) in rat kidney tissue and its inhibitory effect on the growth of cultured rat mesangial cells (MsC). A monoclonal antibody against AM developed by our laboratory was used to detect the localization of AM protein in rat kidney tissue by avidin-biotin complex immunohistochemistry. The expressions of AM and its receptor CRLR mRNA on cultured glomerular epithelial cells (GEC) and MsC were investigated by Northern blot assay, and the possible effect of AM secreted by GEC on MsC proliferation was observed using [3H]thymidine incorporation as an index. A specific monoclonal antibody against AM was succesfully developed. AM was immunohistochemically localized mainly in glomeruli (GEC and endothelial cells), some cortical proximal tubules, medullary collecting duct cells, interstitial cells, vascular smooth muscle cells and endothelial cells. Northern blot assay showed that AM mRNA was expressed only on cultured GEC, but not on MsC, however, AM receptor CRLR mRNA was only expressed on MsC. GEC conditioned medium containing AM can inhibit MsC growth and AM receptor blocker CGRP8-37 may partially decreased this inhibitory effect. AM produced by GEC inhibits the proliferation of MsC, which suggests that AM as an important regulator is involved in glomerular normal physiological functions and pathologic processes.
    Chinese Medical Sciences Journal 10/2002; 17(3):129-33.