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Yao XM, Zhang FH, Liu Y. Clinical Significance and Prognostic Value of the Expression of LAG-3 and FGL1 in Esophageal Squamous Cell Carcinoma. Bull Exp Biol Med 2023; 174:774-778. [PMID: 37162630 DOI: 10.1007/s10517-023-05796-0] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Indexed: 05/11/2023]
Abstract
In this retrospective study, we analyzed the expression of lymphocyte activating gene 3 (LAG-3) and fibrinogen-like protein 1 (FGP1) mRNA and the corresponding proteins in 78 patients with esophageal squamous cell carcinoma (ESCC) to evaluate the clinical significance and prognostic value. mRNA and protein expression were analyzed by reverse transcription PCR and Western blotting, respectively. The expression of LAG-3 and FGL1 mRNA and the corresponding proteins in tumor tissues were significantly increased in comparison with the normal esophageal mucosa. The overexpression of LAG-3 significantly correlated with the content of tumor-infiltrating lymphocytes (TILs), tumor differentiation, and TNM stage. The overexpression of FGL1 also significantly correlated with TILs, TNM stage, and lymph node metastasis. Kaplan-Meier survival analysis showed that tumor diameter, TNM stage, lymph node metastasis, LAG-3 and FGL1 protein expression were related to the progression-free survival (p<0.05). Multivariate Cox regression showed that the level of FGL1 and TNM stage were independent prognostic factors of progression-free survival. We speculated that the tumor microenvironment of ESCC induces immunosuppression due to up-regulated expression of LAG-3 and FGL1 in the tumor tissues, which promotes tumor growth.
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Affiliation(s)
- X M Yao
- Department of Tumor Radiotherapy and Chemotherapy, North China University of Science and Technology Affiliated Hospital, Tangshan, Hebei, China
| | - F H Zhang
- Department of Radiotherapy and Chemotherapy, Tangshan People's Hospital, Tangshan, Hebei, China
| | - Y Liu
- Department of Pathology, Hebei Tumor Hospital, Hebei province, Shijiazhuang, China.
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Zhou S, Sun Y, Xing Y, Wang Z, Wan S, Yao X, Hua Q, Meng X, Cheng J, Zhong M, Lv K, Kong X. Corrigendum to "Exenatide ameliorates hydrogen peroxide-induced pancreatic β-cell apoptosis through regulation of METTL3-mediated m 6A methylation" [Eur. J. Pharmacol. 924 (2022) 174960]. Eur J Pharmacol 2023; 946:175652. [PMID: 36924576 DOI: 10.1016/j.ejphar.2023.175652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
Affiliation(s)
- Simin Zhou
- Department of Endocrinology, The First Affiliated Hospital of Wannan Medical College, Yijishan Hospital, Wuhu, 241001, China; Key Laboratory of Non-coding RNA Transformation Research of Anhui Higher Education Institution, Wannan Medical College, Wuhu, 241002, China
| | - Yue Sun
- Department of Endocrinology, The First Affiliated Hospital of Wannan Medical College, Yijishan Hospital, Wuhu, 241001, China; Key Laboratory of Non-coding RNA Transformation Research of Anhui Higher Education Institution, Wannan Medical College, Wuhu, 241002, China
| | - Yujie Xing
- Department of Endocrinology, The First Affiliated Hospital of Wannan Medical College, Yijishan Hospital, Wuhu, 241001, China; Key Laboratory of Non-coding RNA Transformation Research of Anhui Higher Education Institution, Wannan Medical College, Wuhu, 241002, China
| | - Zhi Wang
- Key Laboratory of Non-coding RNA Transformation Research of Anhui Higher Education Institution, Wannan Medical College, Wuhu, 241002, China; Department of Cardiology, The First Affiliated Hospital of Wannan Medical College, Yijishan Hospital, Wuhu, 241001, China
| | - Shujun Wan
- Key Laboratory of Non-coding RNA Transformation Research of Anhui Higher Education Institution, Wannan Medical College, Wuhu, 241002, China; Central Laboratory of Yijishan Hospital, Wuhu, 241001, China
| | - Xinming Yao
- Department of Endocrinology, The First Affiliated Hospital of Wannan Medical College, Yijishan Hospital, Wuhu, 241001, China
| | - Qiang Hua
- Department of Endocrinology, The First Affiliated Hospital of Wannan Medical College, Yijishan Hospital, Wuhu, 241001, China
| | - Xiangjian Meng
- Department of Endocrinology, The First Affiliated Hospital of Wannan Medical College, Yijishan Hospital, Wuhu, 241001, China
| | - Jinhan Cheng
- Department of Endocrinology, The First Affiliated Hospital of Wannan Medical College, Yijishan Hospital, Wuhu, 241001, China
| | - Min Zhong
- Key Laboratory of Non-coding RNA Transformation Research of Anhui Higher Education Institution, Wannan Medical College, Wuhu, 241002, China; Central Laboratory of Yijishan Hospital, Wuhu, 241001, China; Clinical Research Center for Critical Respiratory Medicine of Anhui Province, Wannan Medical College, Wuhu, 241002, China
| | - Kun Lv
- Key Laboratory of Non-coding RNA Transformation Research of Anhui Higher Education Institution, Wannan Medical College, Wuhu, 241002, China; Central Laboratory of Yijishan Hospital, Wuhu, 241001, China; Clinical Research Center for Critical Respiratory Medicine of Anhui Province, Wannan Medical College, Wuhu, 241002, China.
| | - Xiang Kong
- Department of Endocrinology, The First Affiliated Hospital of Wannan Medical College, Yijishan Hospital, Wuhu, 241001, China; Key Laboratory of Non-coding RNA Transformation Research of Anhui Higher Education Institution, Wannan Medical College, Wuhu, 241002, China; Central Laboratory of Yijishan Hospital, Wuhu, 241001, China; Clinical Research Center for Critical Respiratory Medicine of Anhui Province, Wannan Medical College, Wuhu, 241002, China.
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Yao XM, Yan H. [Application of next-generation sequencing in the pathogenesis of uveal melanoma]. Zhonghua Yan Ke Za Zhi 2022; 58:970-974. [PMID: 36348543 DOI: 10.3760/cma.j.cn112142-20220708-00335] [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: 06/16/2023]
Abstract
Uveal melanoma, as the most common intraocular malignant tumor in adults, has poor overall survival after metastasis. In recent years, next-generation sequencing technology has been increaingly applied in studying the genetic characteristics of diseases. From the perspectives of genome, epigenome, and transcriptome, this review summed up the genomics mutation, epigenomics regulation mechanism, and immune transcriptomic profiling of uveal melanoma in the context of next-generation sequencing technologies, especially chromosome copy number variation, gene mutation and DNA methylation.
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Affiliation(s)
- X M Yao
- Department of Ophthalmology, General Hospital of Tianjin Medical University, Tianjin 300052, China
| | - H Yan
- Department of Ophthalmology, General Hospital of Tianjin Medical University, Tianjin 300052, China
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Zhou S, Sun Y, Xing Y, Wang Z, Wan S, Yao X, Hua Q, Meng X, Cheng J, Zhong M, Lv K, Kong X. Exenatide ameliorates hydrogen peroxide-induced pancreatic β-cell apoptosis through regulation of METTL3-mediated m 6A methylation. Eur J Pharmacol 2022; 924:174960. [PMID: 35436474 DOI: 10.1016/j.ejphar.2022.174960] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 04/09/2022] [Accepted: 04/12/2022] [Indexed: 01/05/2023]
Abstract
Exenatide, a glucagon-like peptide-1 (GLP-1) receptor agonist, is a commonly used hypoglycemic agent in clinical practice; it inhibits reactive oxygen species-induced pancreatic β-cell apoptosis. N6-methyladenosine (m6A) is produced by the methylation of RNA N6 residues and has recently been shown to play a crucial role in the regulation of islet β-cell growth and development. However, the involvement of m6A methylation in the β-cell protective effects of exenatide has not been clarified. In this study, the m6A-methylated RNA content and methyltransferase-like 3 (METTL3) expression levels in NIT-1 cells and primary mouse islets were found to significantly decrease following treatment with hydrogen peroxide (H2O2). Treatment with exenatide induced an increase in m6A content and METTL3 expression in the H2O2-treated NIT-1 cells and islets. Moreover, METTL3 silencing resulted in NIT-1 cell apoptosis under normal culture conditions. METTL3 upregulation significantly ameliorated H2O2-induced apoptosis in NIT-1 cells and primary islets. Furthermore, the anti-apoptotic effects of exenatide were obviously reversed by METTL3 knockdown. In conclusion, these findings suggest that exenatide elicits its anti-apoptotic effects in pancreatic β-cells by promoting m6A methylation through the upregulation METTL3 expression.
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Affiliation(s)
- Simin Zhou
- Department of Endocrinology, The First Affiliated Hospital of Wannan Medical College, Yijishan Hospital, Wuhu, 241001, China; Key Laboratory of Non-coding RNA Transformation Research of Anhui Higher Education Institution, Wannan Medical College, Wuhu, 241002, China
| | - Yue Sun
- Department of Endocrinology, The First Affiliated Hospital of Wannan Medical College, Yijishan Hospital, Wuhu, 241001, China; Key Laboratory of Non-coding RNA Transformation Research of Anhui Higher Education Institution, Wannan Medical College, Wuhu, 241002, China
| | - Yujie Xing
- Department of Endocrinology, The First Affiliated Hospital of Wannan Medical College, Yijishan Hospital, Wuhu, 241001, China; Key Laboratory of Non-coding RNA Transformation Research of Anhui Higher Education Institution, Wannan Medical College, Wuhu, 241002, China
| | - Zhi Wang
- Key Laboratory of Non-coding RNA Transformation Research of Anhui Higher Education Institution, Wannan Medical College, Wuhu, 241002, China; Department of Cardiology, The First Affiliated Hospital of Wannan Medical College, Yijishan Hospital, Wuhu, 241001, China
| | - Shujun Wan
- Key Laboratory of Non-coding RNA Transformation Research of Anhui Higher Education Institution, Wannan Medical College, Wuhu, 241002, China; Central Laboratory of Yijishan Hospital, Wuhu, 241001, China
| | - Xinming Yao
- Department of Endocrinology, The First Affiliated Hospital of Wannan Medical College, Yijishan Hospital, Wuhu, 241001, China
| | - Qiang Hua
- Department of Endocrinology, The First Affiliated Hospital of Wannan Medical College, Yijishan Hospital, Wuhu, 241001, China
| | - Xiangjian Meng
- Department of Endocrinology, The First Affiliated Hospital of Wannan Medical College, Yijishan Hospital, Wuhu, 241001, China
| | - Jinhan Cheng
- Department of Endocrinology, The First Affiliated Hospital of Wannan Medical College, Yijishan Hospital, Wuhu, 241001, China
| | - Min Zhong
- Key Laboratory of Non-coding RNA Transformation Research of Anhui Higher Education Institution, Wannan Medical College, Wuhu, 241002, China; Central Laboratory of Yijishan Hospital, Wuhu, 241001, China; Clinical Research Center for Critical Respiratory Medicine of Anhui Province, Wannan Medical College, Wuhu, 241002, China
| | - Kun Lv
- Key Laboratory of Non-coding RNA Transformation Research of Anhui Higher Education Institution, Wannan Medical College, Wuhu, 241002, China; Central Laboratory of Yijishan Hospital, Wuhu, 241001, China; Clinical Research Center for Critical Respiratory Medicine of Anhui Province, Wannan Medical College, Wuhu, 241002, China.
| | - Xiang Kong
- Department of Endocrinology, The First Affiliated Hospital of Wannan Medical College, Yijishan Hospital, Wuhu, 241001, China; Key Laboratory of Non-coding RNA Transformation Research of Anhui Higher Education Institution, Wannan Medical College, Wuhu, 241002, China; Central Laboratory of Yijishan Hospital, Wuhu, 241001, China; Clinical Research Center for Critical Respiratory Medicine of Anhui Province, Wannan Medical College, Wuhu, 241002, China.
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Wan SJ, Hua Q, Xing YJ, Cheng Y, Zhou SM, Sun Y, Yao XM, Meng XJ, Cheng JH, Wu H, Zhai Q, Zhang Y, Kong X, Lv K. Decreased Urine N6-methyladenosine level is closely associated with the presence of diabetic nephropathy in type 2 diabetes mellitus. Front Endocrinol (Lausanne) 2022; 13:986419. [PMID: 36237191 PMCID: PMC9553099 DOI: 10.3389/fendo.2022.986419] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 08/22/2022] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND To investigate the dynamic changes of urine N6-methyladenosine (m6A) levels in patients with type 2 diabetes mellitus (T2DM) and diabetic nephropathy (DN) and evaluate the clinical significance. METHODS First, the levels of urine m6A were examined and compared among 62 patients with T2DM, 70 patients with DN, and 52 age- and gender-matched normal glucose tolerant subjects (NGT) by using a MethyIFIashTM Urine m6A Quantification Kit. Subsequently, we compared the concentrations of urine m6A between different stages of DN. Moreover, statistical analysis was performed to evaluate the association of urine m6A with DN. RESULTS The levels of m6A were significantly decreased in patients with DN [(16.10 ± 6.48) ng/ml], compared with NGT [(23.12 ± 7.52) ng/ml, P < 0.0001] and patients with T2DM [(20.39 ± 7.16) ng/ml, P < 0.0001]. Moreover, the concentrations of urine m6A were obviously reduced with the deterioration of DN. Pearson rank correlation and regression analyses revealed that m6A was significantly associated with DN (P < 0.05). The areas under the receiver operator characteristics curve (AUC) were 0.783 (95% CI, 0.699 - 0.867, P < 0.0001) for the DN and NGT groups, and 0.737 (95% CI, 0.639 - 0.835, P < 0.0001) for the macroalbuminuria and normoalbuminuria groups, and the optimal cutoff value for m6A to distinguish the DN from NGT and the macroalbuminuria from normoalbuminuria cases was 0.4687 (diagnostic sensitivity, 71%; diagnostic specificity, 76%) and 0.4494 (diagnostic sensitivity, 79%; diagnostic specificity, 66%), respectively. CONCLUSIONS The levels of urine m6A are significantly decreased in patients with DN and change with the deterioration of DN, which could serve as a prospective biomarker for the diagnosis of DN.
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Affiliation(s)
- Shu-jun Wan
- Central Laboratory, The first affiliated hospital of Wannan Medical College, Wuhu, China
- Key Laboratory of Non-coding RNA Transformation Research of Anhui Higher Education Institutes (Wannan Medical College), Wuhu, China
- Anhui Province Clinical Research Center for Critical Respiratory Medicine, Wuhu, China
| | - Qiang Hua
- Department of Endocrinology, The first affiliated hospital of Wannan Medical College, Yijishan Hospital, Wuhu, China
| | - Yu-jie Xing
- Department of Endocrinology, The first affiliated hospital of Wannan Medical College, Yijishan Hospital, Wuhu, China
| | - Yi Cheng
- Department of Endocrinology, The first affiliated hospital of Wannan Medical College, Yijishan Hospital, Wuhu, China
| | - Si-min Zhou
- Department of Endocrinology, The first affiliated hospital of Wannan Medical College, Yijishan Hospital, Wuhu, China
| | - Yue Sun
- Department of Endocrinology, The first affiliated hospital of Wannan Medical College, Yijishan Hospital, Wuhu, China
| | - Xin-ming Yao
- Department of Endocrinology, The first affiliated hospital of Wannan Medical College, Yijishan Hospital, Wuhu, China
| | - Xiang-jian Meng
- Department of Endocrinology, The first affiliated hospital of Wannan Medical College, Yijishan Hospital, Wuhu, China
| | - Jin-han Cheng
- Department of Endocrinology, The first affiliated hospital of Wannan Medical College, Yijishan Hospital, Wuhu, China
| | - Han Wu
- Anhui Province Clinical Research Center for Critical Respiratory Medicine, Wuhu, China
- Department of Endocrinology, The first affiliated hospital of Wannan Medical College, Yijishan Hospital, Wuhu, China
| | - Qing Zhai
- Department of Endocrinology, The first affiliated hospital of Wannan Medical College, Yijishan Hospital, Wuhu, China
| | - Yan Zhang
- Central Laboratory, The first affiliated hospital of Wannan Medical College, Wuhu, China
| | - Xiang Kong
- Central Laboratory, The first affiliated hospital of Wannan Medical College, Wuhu, China
- Key Laboratory of Non-coding RNA Transformation Research of Anhui Higher Education Institutes (Wannan Medical College), Wuhu, China
- Anhui Province Clinical Research Center for Critical Respiratory Medicine, Wuhu, China
- Department of Endocrinology, The first affiliated hospital of Wannan Medical College, Yijishan Hospital, Wuhu, China
- *Correspondence: Kun Lv, ; Xiang Kong,
| | - Kun Lv
- Central Laboratory, The first affiliated hospital of Wannan Medical College, Wuhu, China
- Key Laboratory of Non-coding RNA Transformation Research of Anhui Higher Education Institutes (Wannan Medical College), Wuhu, China
- Anhui Province Clinical Research Center for Critical Respiratory Medicine, Wuhu, China
- *Correspondence: Kun Lv, ; Xiang Kong,
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Zhang Y, Yao XM, Zhu SL, Suo SS, Mao LP, Wei JY, Yu WJ, Mai WY, Tong HY, Meng HT, Qian WB, Jin J. [Efficacy and safety analysis of different dose idarubicin plus cytarabine regimen as induction chemotherapy for young patients with de-novo acute myeloid leukemia]. Zhonghua Xue Ye Xue Za Zhi 2017; 37:682-7. [PMID: 27587250 PMCID: PMC7348532 DOI: 10.3760/cma.j.issn.0253-2727.2016.08.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
目的 探讨不同剂量去甲氧柔红霉素(IDA)联合阿糖胞苷诱导方案(IA)治疗年轻初发急性髓系白血病(AML)(除外急性早幼粒细胞白血病)的临床疗效、安全性和长期预后。 方法 回顾性分析2009年1月至2014年7月收治的采用IA方案治疗的149例<55岁初发AML患者临床资料,根据IDA剂量分为高标准剂量组(10~12 mg·m−2·d−1)、低标准剂量组(8~9 mg·m−2·d−1)和低剂量组(<8 mg·m−2·d−1),比较各组患者的化疗反应、血液学及非血液学不良事件,并分析预后。 结果 高标准剂量组34例,低标准剂量组53例,低剂量组62例。三组第1个疗程完全缓解(CR)率分别为79.4%、75.5%和46.8%,第1个疗程有效率分别为97.1%、94.3%和64.5%,总CR率分别为85.3%、81.1%和54.8%,高标准剂量组、低标准剂量组均显著高于低剂量组(P值均<0.05),前两者间差异无统计学意义(P值均>0.05)。多因素分析证实标准IDA剂量的确在诱导缓解疗效上优于低剂量(P<0.05)。在不良反应方面,化疗期间WBC最低值三组间差异有统计学意义(P=0.002),其余差异均无统计学意义。低标准剂量组在总生存(OS)上显著优于低剂量组(P=0.030),高标准剂量组与低剂量组相比,OS也有改善的趋势(P=0.054)。三组间在无事件生存、无复发生存差异均无统计学意义(P值均>0.05)。 结论 对于年轻(<55岁)初发AML患者,标准剂量IA方案可显著提高CR率,且患者的耐受性良好。标准剂量IA方案在一定程度上能改善年轻(<55岁)AML患者OS。
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Affiliation(s)
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- The First Affiliated Hospital of Zhejiang University, Hangzhou 310003, China
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Ye SD, Zheng M, Zhao LL, Qian Y, Yao XM, Ren A, Li SM, Jing CY. Intensive insulin therapy decreases urinary MCP-1 and ICAM-1 excretions in incipient diabetic nephropathy. Eur J Clin Invest 2009; 39:980-5. [PMID: 19663918 DOI: 10.1111/j.1365-2362.2009.02203.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
BACKGROUND Nowadays, intensive insulin treatment has been widely used in type 2 diabetics who have poor control of blood glucose, to reduce the risk of chronic complications of diabetes. Recently, some scholars have paid more attention to the pivotal role of inflammation involved in type 2 diabetes and its complications. Monocyte chemoattractant protein-1 (MCP-1) and intercellular adhesion molecule-1 (ICAM-1), which are two important inflammatory chemokines, have been documented to participate in the onset and development of type 2 diabetes and its complications, such as diabetic nephropathy (DN). DESIGN In the current study, we recruited 30 type 2 diabetics with microalbuminuria to be treated with multiple insulin injections daily for 2 weeks. Random spot urine samples (corrected for creatinine-Cr) were collected for the examination of urinary MCP-1, ICAM-1 and albumin (Alb) levels before and after the intensive insulin therapy. Changes in their levels were observed to test the hypothesis that type 2 diabetes with microalbuminuria is associated with elevated urinary concentrations of MCP-1 and ICAM-1, and intensive insulin therapy can result in a decline of Alb by reducing the inflammatory reaction. RESULTS The urinary MCP-1/Cr and urinary ICAM-1/Cr ratios in type 2 diabetic patients with microalbuminuria were much higher than those in normal controls, and intensive insulin treatment could decrease significantly the urinary MCP-1/Cr, ICAM-1/Cr and Alb/Cr ratios in type 2 diabetics with microalbuminuria. CONCLUSION Intensive insulin treatment may protect against renal injury in early DN by reducing the urinary MCP-1 and ICAM-1 excretions.
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Affiliation(s)
- S D Ye
- Anhui Provincial Hospital Affiliated to Anhui Medical University, Hefei 230001, China.
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Yao XM, Ye SD, Chen Y, Zai ZM, Li XC, Wang YX, Chen K. Rosiglitazone protects diabetic rats against kidney injury through the suppression of renal matrix metalloproteinase-9 expression. Diabetes Obes Metab 2009; 11:519-22. [PMID: 19236438 DOI: 10.1111/j.1463-1326.2008.00990.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
In this study, the effects of rosiglitazone on renal matrix metalloproteinase-9 (MMP-9) expression and its possible renoprotective mechanisms were investigated in streptozotocin-induced diabetic rats. We examined the urinary excretion rates of albumin (ALB), retinal-binding protein (RBP) and MMP-9 in control healthy rats (group C, n = 8), untreated diabetic rats (group D, n = 8) and diabetic rats treated with rosiglitazone (5mg/kg/day) (group R, n = 8) at eighth week. The renal tissue of diabetic rats was obtained for observing renal pathological changes by electron microscope and examining the expression of renal MMP-9 mRNA by RT-PCR. Our results showed that urinary excretion rates of MMP-9. ALB and RBP were significantly increased concurrently with the expression of renal MMP-9mRNA in group D compared with those of group C. Rosiglitazone significantly reduced urinary excretion rates of ALB, RBP and MMP-9 as well as the expression of renal MMP-9 mRNA. In addition, urinary excretion rate of MMP-9 showed positive relationship with urinary excretion rates of ALB and RBP. In conclusion, rosiglitazone definitely protects diabetic rats against renal injury, which may be partly associated with decreasing expression of renal MMP-9 mRNA and urinary MMP-9 production.
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Xiong GZ, Yao XM, Yang P. [Study of intracranial hypertension from traumatic brain edema treated with eliminating the stagnant and catharsis with a small dose mannitol]. Hunan Yi Ke Da Xue Xue Bao 2000; 25:303-4. [PMID: 12212178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
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Abstract
The two contiguous IGF2 (human insulin-like growth factor II) and H19 genes are reciprocally imprinted in both human and mouse. In most tissues, IGF2 is transcribed only from the paternal chromosome while H19 is transcribed only from the maternal allele. The presence of a differential methylation region (DMR) on the two parental alleles at the 5' flanking region of H19 has been proposed to constitute the gametic imprint, which controls the reciprocal allelic expression of the two genes. Using bisulfite genomic sequencing, we have assessed the methylation status of cytosine (including 154 CpG sites) in six CpG-rich regions of the human IGF2-H19 genes. In a CpG island near promoter P3 of the IGF2 gene, more than 99.8% of all cytosines were converted to thymidine by sodium bisulfite mutagenesis, indicating that none of the CpGs was methylated. In the IGF2 exon 8-9 region, mosaic methylation of 56 CpG sites was observed in fetal tissues and in adult blood DNA. In contrast to the mosaic methylation of IGF2, the allelic methylation of the human H19 DMR was uniform. In the CpG region located 2 kb upstream (-2362 to -1911) of the H19 transcription site, all 25 CpG sites were completely methylated on only one parental allele. Uniform allele-specific methylation was also observed in the CpG island proximal to the H19 promoter (-711 to -290) with complete methylation of all 25 CpG sites in one parental allele. In contrast, the CpG region in the H19 promoter (-292 to +15) was mosaically methylated in all tissues. In addition, cytosine was methylated at three CpNpG and GpNpC sites on the top DNA strand and one CpNpG site on the bottom DNA strand from the fetal brain. The cytosines at CpG sites were methylated on both DNA strands (symmetric methylation) while cytosines at the CpNpG and GpNpC sites were methylated on only one DNA strand (asymmetric methylation). The asymmetric methylation was associated with tissue-specific disruption of H19 genomic imprinting in fetal brain.
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Affiliation(s)
- T H Vu
- Medical Service and GRECC, Stanford University School of Medicine, Palo Alto, California 94304, USA.
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