1
|
Wang XH, Xu F, Cheng M, Wang X, Zhang DM, Zhao LH, Cai HL, Huang HY, Chen T, Zhang XL, Wang XQ, Cheng XB, Su JB, Lu Y. Fasting serum total bile acid levels are associated with insulin sensitivity, islet β-cell function and glucagon levels in response to glucose challenge in patients with type 2 diabetes. Endocr J 2020; 67:1107-1117. [PMID: 32684527 DOI: 10.1507/endocrj.ej20-0201] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Type 2 diabetes (T2D) is characterized by islet β-cell dysfunction and impaired suppression of glucagon secretion of α-cells in response to oral hyperglycaemia. Bile acid (BA) metabolism plays a dominant role in maintaining glucose homeostasis. So we evaluated the association of fasting serum total bile acids (S-TBAs) with insulin sensitivity, islet β-cell function and glucagon levels in T2D. Total 2,952 T2D patients with fasting S-TBAs in the normal range were recruited and received oral glucose tolerance tests for determination of fasting and postchallenge glucose, C-peptide and glucagon. Fasting and systemic insulin sensitivity were assessed by homeostasis model assessment (HOMA) and Matsuda index using C-peptide, i.e., ISHOMA-cp and ISIM-cp, respectively. Islet β-cell function was assessed by the insulin-secretion-sensitivity-index-2 using C-peptide (ISSI2cp). The area under the glucagon curve (AUCgla) was used to assess postchallenge glucagon. The results showed ISHOMA-cp, ISIM-cp and ISSI2cp decreased, while AUCgla notably increased, across ascending quartiles of S-TBAs but not fasting glucagon. Moreover, S-TBAs were inversely correlated with ISHOMA-cp, ISIM-cp and ISSI2cp (r = -0.21, -0.15 and -0.25, respectively, p < 0.001) and positively correlated with AUCgla (r = 0.32, p < 0.001) but not with fasting glucagon (r = 0.033, p = 0.070). Furthermore, after adjusting for other clinical covariates by multiple linear regression analyses, the S-TBAs were independently associated with ISHOMA-cp (β = -0.04, t = -2.82, p = 0.005), ISIM-cp (β = -0.11, t = -7.05, p < 0.001), ISSI2cp (β = -0.15, t = -10.26, p < 0.001) and AUCgla (β = 0.29, t = 19.08, p < 0.001). Increased fasting S-TBAs are associated with blunted fasting and systemic insulin sensitivity, impaired islet β-cell function and increased glucagon levels in response to glucose challenge in T2D.
Collapse
Affiliation(s)
- Xiao-Hua Wang
- Department of Endocrinology, First Affiliated Hospital of Soochow University, Suzhou 215006, China
- Department of Endocrinology, Affiliated Hospital 2 of Nantong University, and First People's Hospital of Nantong City, Nantong 226001, China
| | - Feng Xu
- Department of Endocrinology, Affiliated Hospital 2 of Nantong University, and First People's Hospital of Nantong City, Nantong 226001, China
| | - Ming Cheng
- School of Rail Transportation, Soochow University, Suzhou 215006, China
| | - Xing Wang
- Department of Endocrinology, Affiliated Hospital 2 of Nantong University, and First People's Hospital of Nantong City, Nantong 226001, China
| | - Dong-Mei Zhang
- Medical Research Center, Affiliated Hospital 2 of Nantong University, and First People's Hospital of Nantong City, Nantong 226001, China
| | - Li-Hua Zhao
- Department of Endocrinology, Affiliated Hospital 2 of Nantong University, and First People's Hospital of Nantong City, Nantong 226001, China
| | - Hong-Li Cai
- Department of Geriatrics, Affiliated Hospital 2 of Nantong University, and First People's Hospital of Nantong City, Nantong 226001, China
| | - Hai-Yan Huang
- Department of Endocrinology, Affiliated Hospital 2 of Nantong University, and First People's Hospital of Nantong City, Nantong 226001, China
| | - Tong Chen
- Department of Clinical Laboratory, Affiliated Hospital 2 of Nantong University, and First People's Hospital of Nantong City, Nantong 226001, China
| | - Xiu-Lin Zhang
- Department of Clinical Laboratory, Affiliated Hospital 2 of Nantong University, and First People's Hospital of Nantong City, Nantong 226001, China
| | - Xue-Qin Wang
- Department of Endocrinology, Affiliated Hospital 2 of Nantong University, and First People's Hospital of Nantong City, Nantong 226001, China
| | - Xing-Bo Cheng
- Department of Endocrinology, First Affiliated Hospital of Soochow University, Suzhou 215006, China
| | - Jian-Bin Su
- Department of Endocrinology, Affiliated Hospital 2 of Nantong University, and First People's Hospital of Nantong City, Nantong 226001, China
| | - Yan Lu
- Department of Endocrinology, First Affiliated Hospital of Soochow University, Suzhou 215006, China
| |
Collapse
|
2
|
Jiang L, Li N, Xia MY, Zhang ZX, Cheng XB. [Gait and neuromuscular activity changes in female older adults with knee osteoarthritis]. Zhonghua Yu Fang Yi Xue Za Zhi 2020; 54:320-322. [PMID: 32187939 DOI: 10.3760/cma.j.issn.0253-9624.2020.03.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
From November to December of 2018, twenty 65-year-old or older women patients with knee osteoarthritis were recruited from the Department of Physical Therapy, the First Affiliated Hospital of Anhui Medical University. Meanwhile, twenty healthy 65-year-old or older women were recruited from the local community. The results showed that the knee contact angle of the patient group was more flexed (P=0.040), and the minimum angle of the knee joint increased (P=0.008) during the stance period compared to the healthy group. However, there was no significant difference in the maximum contact angle between the angle of hip and ankle joints. In addition, the tibialis anterior muscle of the patients was significantly smaller than the healthy group (P=0.023). Therefore, knee osteoarthritis could change the gait and muscle activity of older women, especially the knee joint.
Collapse
Affiliation(s)
- L Jiang
- School of Humanistic Medicine, Anhui Medical University, Hefei 230032, China
| | | | | | | | | |
Collapse
|
3
|
Wang DQ, Miao XJ, Gao J, Zhou YH, Ji FY, Cheng XB. The 150-kDa oxygen-regulated protein (ORP150) regulates proteinuria in diabetic nephropathy via mediating VEGF. Exp Mol Pathol 2019; 110:104255. [PMID: 31028725 DOI: 10.1016/j.yexmp.2019.04.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [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: 01/30/2019] [Revised: 04/08/2019] [Accepted: 04/23/2019] [Indexed: 01/21/2023]
Abstract
The 150-kDa oxygen-regulated protein (ORP150) belongs to a family of the heat shock protein implicated in the cellular response to environmental stress. Previous data demonstrated that ORP150 regulates the secretion of vascular endothelial growth factor (VEGF) to drive progression of angiogenesis associated with proliferative diabetic retinopathy. However, the expression and biological functions of serum ORP150 levels in diabetic nephropathy (DN) remain unclear. In this study, we reported for the first time that ORP150 was up-regulated in serum of patients with DN. Moreover, we observed the dramatic increase in serum ORP150 accompanied with the elevated levels of proteinuria and serum VEGF levels in DN, indicating the possible involvement of ORP150 in regulation of albuminuria via mediating VEGF in DN. Employing the streptozotocin (STZ) to construct the DN model, we confirmed the positive correlation of ORP150 with VEGF in vivo. Monoclonal anti-ORP150 antibodies treatment significantly decreased the secretion of VEGF and albuminuria in STZ-induced DN models. Consequently, our data suggested that ORP150 levels were positively correlated with proteinuria burden via mediating VEGF in DN. It may be considered as a novel diagnostic and therapeutic target.
Collapse
Affiliation(s)
- De-Qin Wang
- Department of Endocrinology, The First Affiliated Hospital of Soochow University, No. 188 Shizi Street, Suzhou 215006, China; Department of Nephrology, The Affiliated Haian Hospital of Nantong University, No. 17 Middle Zhongba Road, Haian 226600, China
| | - Xian-Jing Miao
- Department of Nephrology, The Affiliated Haian Hospital of Nantong University, No. 17 Middle Zhongba Road, Haian 226600, China
| | - Jian Gao
- Department of Nephrology, The Affiliated Haian Hospital of Nantong University, No. 17 Middle Zhongba Road, Haian 226600, China
| | - Yong-Hua Zhou
- Department of Nephrology, The Affiliated Haian Hospital of Nantong University, No. 17 Middle Zhongba Road, Haian 226600, China
| | - Fei-Yue Ji
- Department of Central Laboratory, The Affiliated Haian Hospital of Nantong University, No. 17 Middle Zhongba Road, Haian 226600, China
| | - Xing-Bo Cheng
- Department of Endocrinology, The First Affiliated Hospital of Soochow University, No. 188 Shizi Street, Suzhou 215006, China.
| |
Collapse
|
4
|
Qiu YF, Liu JL, Yang JH, Cheng XB. Note: A simple feedback control method based on a real time acquisition voltage to avoid second breakdown of PFL. Rev Sci Instrum 2018; 89:126101. [PMID: 30599589 DOI: 10.1063/1.5040871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Accepted: 11/08/2018] [Indexed: 06/09/2023]
Abstract
To avoid serious damage in the pulse forming line (PFL) caused by repeated breakdown, a simple feedback control method based on a reverse peak voltage of the primary capacitor of the transformer is presented in this paper. The theoretical analysis of the breakdown circuit is carried out. The results indicate that once the breakdown occurs, the reverse peak voltage of the primary capacitor of the transformer increases obviously. A simple comparison function is added in the control system of the accelerator. If the collected reverse peak voltage of the primary capacitor is higher than the reference value, then the accelerator stops working immediately. The experimental result shows that this method can prevent the re-breakdown of the PFL effectively.
Collapse
Affiliation(s)
- Y F Qiu
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, Hunan 410073, People's Republic of China
| | - J L Liu
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, Hunan 410073, People's Republic of China
| | - J H Yang
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, Hunan 410073, People's Republic of China
| | - X B Cheng
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, Hunan 410073, People's Republic of China
| |
Collapse
|
5
|
Cheng XY, Li H, Cheng XB. Carbides and possible hydrogen irreversible trapping sites in ultrahigh strength round steel. Micron 2017; 103:22-28. [PMID: 28942370 DOI: 10.1016/j.micron.2017.09.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 09/10/2017] [Accepted: 09/11/2017] [Indexed: 10/18/2022]
Abstract
The carbides in ultrahigh strength round steel have been investigated by using laser-assisted atom probe tomography (APT) and high resolution transmission electron microscopy (HRTEM) in this paper. Two kinds of carbides are found and one is iron carbide M6C, where carbide formation elements Cr, Mn and Mo replace partial Fe, while the other is niobium carbide MC, where M includes V and Mo besides Nb. These two carbides, due to their different evaporation field, have various densities in reconstructed image of APT. After correction, the hydrogen content within these two carbides illustrates that M6C cannot trap hydrogen, while MC can. The different behaviors in trapping hydrogen between these two carbides may result from elements Fe or Cr in M6C carbide having weaker affinity for hydrogen than Nb and V have in MC.
Collapse
Affiliation(s)
- X Y Cheng
- Institute of Materials, Shanghai University, Shanghai 200072, China.
| | - H Li
- Institute of Materials, Shanghai University, Shanghai 200072, China
| | - X B Cheng
- Institute of Materials, Shanghai University, Shanghai 200072, China
| |
Collapse
|
6
|
Su JB, Yang XH, Zhang XL, Cai HL, Huang HY, Zhao LH, Xu F, Chen T, Cheng XB, Wang XQ, Lu Y. The association of long-term glycaemic variability versus sustained chronic hyperglycaemia with heart rate-corrected QT interval in patients with type 2 diabetes. PLoS One 2017; 12:e0183055. [PMID: 28846720 PMCID: PMC5573287 DOI: 10.1371/journal.pone.0183055] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Accepted: 07/30/2017] [Indexed: 01/24/2023] Open
Abstract
Objectives Prolonged heart rate-corrected QT(QTc) interval is related to ventricular arrhythmia and cardiovascular mortality, with considerably high prevalence of type 2 diabetes. Additionally, long-term glycaemic variability could be a significant risk factor for diabetic complications in addition to chronic hyperglycaemia. We compared the associations of long-term glycaemic variability versus sustained chronic hyperglycaemia with the QTc interval among type 2 diabetes patients. Methods In this cross-sectional study, 2904 type 2 diabetes patients were recruited who had undergone at least four fasting plasma glucose (FPG) and 2-hour postprandial plasma glucose (PPG) measurements (at least once for every 3 months, respectively) during the preceding year. Long-term glycaemic variabilities of FPG and 2-hour PPG were assessed by their standard deviations (SD-FPG and SD-PPG, respectively), and chronic fasting and postprandial hyperglycaemia were assessed by their means (M-FPG and M-PPG, respectively). HbA1c was also determined upon enrolment to assess current overall glycaemic control. QTc interval was estimated from resting 12-lead electrocardiograms, and more than 440 ms was considered abnormally prolonged. Results Patients with prolonged QTc interval (≥440 ms) had greater M-FPG, M-PPG, SD-PPG and HbA1c than those with normal QTc interval but comparable SD-FPG. QTc interval was correlated with M-FPG, M-PPG, SD-PPG and HbA1c (r = 0.133, 0.153, 0.245 and 0.207, respectively, p = 0.000) but not with SD-FPG (r = 0.024, p = 0.189). After adjusting for metabolic risk factors via multiple linear regression analysis, SD-PPG, M-PPG and HbA1c (t = 12.16, 2.69 and 10.16, respectively, p = 0.000) were the major independent contributors to the increased QTc interval. The proportion of prolonged QTc interval increased significantly from 10.9% to 14.2% to 26.6% for the first (T1) to second (T2) to third (T3) tertiles of SD-PPG. After adjusting via multiple logistic regression analysis, the odd ratios of prolonged QTc interval of the T2 and T3 versus the T1 of SD-PPG were 1.15 (95% CI, 0.82–1.60) and 2.62 (1.92–3.57), respectively. Conclusions Increased long-term variability of PPG is a strong independent risk factor for prolonged QTc interval in type 2 diabetes patients, in addition to long-term postprandial hyperglycaemia and current HbA1c.
Collapse
Affiliation(s)
- Jian-Bin Su
- Department of Endocrinology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Department of Endocrinology, The Second Affiliated Hospital of Nantong University, Nantong, China
| | - Xiao-Hua Yang
- Department of Endocrinology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Department of Endocrinology, The Affiliated Haian Hospital of Nantong University, Haian, China
| | - Xiu-Lin Zhang
- Department of Clinical Laboratory, The Second Affiliated Hospital of Nantong University, Nantong, China
| | - Hong-Li Cai
- Department of Geriatrics, The Second Affiliated Hospital of Nantong University, Nantong, China
| | - Hai-Yan Huang
- Department of Endocrinology, The Second Affiliated Hospital of Nantong University, Nantong, China
| | - Li-Hua Zhao
- Department of Endocrinology, The Second Affiliated Hospital of Nantong University, Nantong, China
| | - Feng Xu
- Department of Endocrinology, The Second Affiliated Hospital of Nantong University, Nantong, China
| | - Tong Chen
- Department of Clinical Laboratory, The Second Affiliated Hospital of Nantong University, Nantong, China
| | - Xing-Bo Cheng
- Department of Endocrinology, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Xue-Qin Wang
- Department of Endocrinology, The Second Affiliated Hospital of Nantong University, Nantong, China
| | - Yan Lu
- Department of Endocrinology, The First Affiliated Hospital of Soochow University, Suzhou, China
| |
Collapse
|
7
|
Chen X, Dou FX, Cheng XB, Guo AT, Shi HY. [Clinicopathologic characteristics of thyroid-like follicular carcinoma of the kidney: an analysis of five cases and review of literature]. Zhonghua Bing Li Xue Za Zhi 2017; 45:687-691. [PMID: 27760609 DOI: 10.3760/cma.j.issn.0529-5807.2016.10.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To study the clinicopathologic features of thyroid-like follicular renal cell carcinoma. Methods: Clinical data were collected in 5 cases of thyroid-like follicular renal cell carcinoma. HE staining and immunohistochemistry were carried out in surgically-removed specimen to analyze the clinical and pathological features with review of the literatures. Results: The patients aged 20-55 years, with one male and four females; the tumor occurred in the left kidney in three cases and right kidney in two cases. One case had a history of thyroid papillary carcinoma 3 years ago, and the patient had left flank pain, macroscopic haematuria for 2 weeks. The rest four cases had no consciousness of clinical symptoms and signs, without history of thyroid gland surgery; the physical examination found a mass in the kidney and normal thyroid glands. Three patients underwent radical nephrectomy, and the other two patients underwent tumor partial nephrectomy. The tumors were 2-4 cm in size. They showed a solitary nodular mass of well circumscribed with taupe and gray on cut surface. Microscopically, most of tumor cells arranged in thyroid follicular pattern in different sizes, with papillary configuration in a small portion, in four cases; the follicular structure was intermixed with the papillary each half in one case. A large amount of thyroid colloid was deposited within follicule-like structure or papillary axis, lined by simple columnar cells or cubic cells, with obvious atypia, ground-glass nuclei, nuclear groove and rare mitosis. Immunohistochemical staining showed tumor cells were positive for PAX8, and negative for thyroid transcription factor 1 (TTF1) and thyroglobulin (Tg). One of five patients presented with lymph node metastases (4/4) of renal hilum the same time in the diagnosis. Five cases were followed up for 5-84 months after operation, and no tumor progression was found. Conclusions: Thyroid-like follicular renal cell carcinoma is primary renal epithelial malignant tumor. The diagnosis mainly depends on its characteristics of histological appearance, namely similar to the histological morphology of well-differentiated thyroid follicular carcinoma and papillary carcinoma, and the metastasis from the thyroid papillary or follicular carcinoma must be excluded. On the premise of clinical history, immunohistochemical markers TTF1 and Tg have certain value in the differential diagnosis.
Collapse
Affiliation(s)
- X Chen
- Department of Pathology, the General Hospital of People's Liberation Army, Beijing 100853, China
| | - F X Dou
- Department of Pathology, the General Hospital of People's Liberation Army, Beijing 100853, China
| | - X B Cheng
- Department of Pathology, the General Hospital of People's Liberation Army, Beijing 100853, China
| | - A T Guo
- Department of Pathology, the General Hospital of People's Liberation Army, Beijing 100853, China
| | - H Y Shi
- Department of Pathology, the General Hospital of People's Liberation Army, Beijing 100853, China
| |
Collapse
|
8
|
Cheng XB, Hsieh YT, Tu ST, Hsieh MC. Obesity and low target attainment rates in Chinese with type 2 diabetes. Eur J Intern Med 2012; 23:e101-5. [PMID: 22560392 DOI: 10.1016/j.ejim.2012.02.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2011] [Revised: 02/16/2012] [Accepted: 02/28/2012] [Indexed: 10/28/2022]
Abstract
BACKGROUND Although it is known that the prevalence of type 2 diabetes and obesity is increasing in China, there is little research into how obese or non-obese patients may differ in their attainment of treatment goals for type 2 diabetes. To do this, we assessed the attainment of American Diabetes Association (ADA)-recommended goals in Chinese with type 2 diabetes stratified by body mass index (BMI). METHODS This cross-sectional study enrolled 520 Chinese with type 2 diabetes to find out if they had attained the following ADA-recommended goals: HbA1c<7%, SBP<130 mm Hg, DBP<80 mm Hg, LDL-C<100mg/dl, TG<150 mg/dl, HDL-C>40 mg/dl for men and >50mg/dl for women. RESULTS Only 44.4% of all participants achieved the blood pressure goal, 20.8% the HbA1c goal, 44.8% the LDL-C goal, 43.3% the HDL-C goal, and 66.8% the triglyceride goal. Obese patients were less likely than normal weight patients to achieve the blood pressure goal (OR, 0.474; 95% CI, 0.231-0.973; p = 0.01), the HDL goal (OR, 0.365; 95% CI, 0.163-0.817; p = 0.01), or the triglyceride goal (OR, 0.416; 95% CI, 0.212-0.817; p = 0.01), after adjusting for confounders. Compared to normal weight participants, the obese patients had a significantly higher prescription rates for statin, metformin and anti-hypertensive drugs. CONCLUSION Obese diabetic patients were less likely to achieve the blood pressure, LDL-C, HDL-C and triglyceride targets even when they were receiving several drugs to help them meet their target treatment goals. More strategies are needed to improve the treatment of Chinese with type 2 diabetes, particularly those who are obese.
Collapse
Affiliation(s)
- Xing-Bo Cheng
- Department of Endocrinology and Metabolism, The First Affiliated Hospital of Soochow University, Suzhou, China
| | | | | | | |
Collapse
|
9
|
Shao XY, Zhang R, Hu C, Wang CR, Lu JY, Qin W, Yu HY, Bao YQ, Cheng XB, Jia WP. Precise microdeletion detection of Prader-Willi Syndrome with array comparative genome hybridization. Biomed Environ Sci 2010; 23:194-198. [PMID: 20708498 DOI: 10.1016/s0895-3988(10)60052-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2009] [Accepted: 05/30/2010] [Indexed: 05/29/2023]
Abstract
OBJECTIVE Prader-Willi Sydrome (PWS) is a human disorder related to genomic imprinting defect on 15q11-13. It is characterized by a series of classic features such as hypotonia, hyperphagia, obesity, osteoporosis, typical facial and body dysmorphosis, hypogonadism, mental and behaviour disorders. Our study was designed to precisely detect the microdeletions, which accounts for 65%-70% of the PWS. METHODS Physical and laboratory examinations were firstly performed to diagnose PWS clinically, and to discover novel clinical features. Then the patient was screened with bisulfite-specific sequencing and precisely delineated through high-density array CGH. RESULTS With the bisulfite-specific sequencing, the detected CpG island in the PWS critical region was found homozygously hypermethylated. Then with array CGH, a 2.22 Mb type II microdeletion was detected, covering a region from MKRN3, MAGEL2, NDN, PWRN2, PWRN1, C12orf2, SNURF-SNRPN, C/D snoRNAs, to distal of UBE3A. CONCLUSIONS Array CGH, after the fast screening of Bisulfite-specific sequencing, is a feasible and precise method to detect microdeletions in PWS patients. A novel feature of metacarpophalangeal joint rigidity was also presented, which is the first time reported in PWS.
Collapse
Affiliation(s)
- Xin-Yu Shao
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Diabetes Institute, Shanghai Clinical Center for Diabetes, Shanghai, China
| | | | | | | | | | | | | | | | | | | |
Collapse
|
10
|
Wang L, Cao J, Lei DL, Cheng XB, Zhou HZ, Hou R, Zhao YH, Cui FZ. Application of nerve growth factor by gel increases formation of bone in mandibular distraction osteogenesis in rabbits. Br J Oral Maxillofac Surg 2010; 48:515-9. [PMID: 20236741 DOI: 10.1016/j.bjoms.2009.08.042] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2009] [Accepted: 08/17/2009] [Indexed: 11/17/2022]
Abstract
The long period of bony consolidation is a concern in mandibular distraction osteogenesis (DO). We have previously shown that repeated local injections of human nerve growth factor beta (NGFβ) can appreciably improve bony consolidation in a rabbit model of DO. The present study was designed to test the effect of a single injection of human NGFβ delivered by collagen/nano-hydroxyapatite/kappa-carrageenan gels to sites of new bony formation in DO. Rabbits underwent mandibular DO at a rate of 0.75 mm/12h for 6 days. At the end of the distraction period, the following injections were given percutaneously into the callus (n=6 in each of the four groups): human NGFβ in the gel; human NGFβ in saline; the gels alone; and saline alone. Fourteen days after the end of distraction, mechanical testing, histological and histomorphometric variables of the new bone were evaluated. Histologically, the NGFβ group had more advanced consolidation than the other three groups. Both maximal load and bone volume/total volume in this group were significantly higher than in the other three (P<0.05). In conclusion, the delivery of human NGFβ in the gels results in better acceleration of new bone formation than when it is given in saline, and may be a possible way to shorten the duration of craniofacial DO.
Collapse
Affiliation(s)
- L Wang
- Department of Oral and Maxillofacial Surgery, Fourth Military Medical University, School of Stomatology, Xi'an, China
| | | | | | | | | | | | | | | |
Collapse
|
11
|
Affiliation(s)
- X B Cheng
- Biotechnology, DuPont Merck Pharmaceutical Company, Wilmington, DE 19880-0400
| | | | | |
Collapse
|