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1Developmental dysplasia of the hip in the newborn: A systematic review显示文摘Developmental dysplasia of the hip(DDH) denotes a wide spectrum of conditions ranging from subtle acetabular dysplasia to irreducible hip dislocations. Clinical diagnostic tests complement ultrasound imaging in allowing diagnosis, classification and monitoring of this condition. Classification systems relate to the alpha and beta angles in addition to the dynamic coverage index(DCI). Screening programmes for DDH show considerable geographic variation; certain risk factors have been identified which necessitate ultrasound assessment of the newborn. The treatment of DDH has undergone significant evolution, but the current gold standard is still the Pavlik harness. Duration of Pavlik harness treatment has been reported to range from 3 to 9.3 mo. The beta angle, DCI and the superior/lateral femoral head displacement can be assessed via ultrasound to estimate the likelihood of success. Success rates of between 7% and 99% have been reported when using the harness to treat DDH. Avascular necrosis remains the most devastating complication of harness usage with a reported rate of between 0% and 28%. Alternative non-surgical treatment methods used for DDH include devices proposed by LeD amany, Frejka, Lorenz and Ortolani. The Rosen splint and Wagner stocking have also been used for DDH treatment. Surgical treatment for DDH comprises open reduction alongside a combination of femoral or pelvic osteotomies. Femoral osteotomies are carried out in cases of excessive anteversion or valgus deformity of the femoral neck. The two principal pelvic osteotomies most commonly performed are the Salter osteotomy and Pemberton acetabuloplasty. Serious surgical complications include epiphyseal damage, sciatic nerve damage and femoral neck fracture.Vivek Gulati Kelechi Eseonu Junaid Sayani Nizar Ismail Chika Uzoigwe Muhammed Zaki Choudhury Pooja Gulati Adeel Aqil Saket Tibrewal 2013World Journal of Orthopedics2013,4,2:29
2Clinical correlates of common corneal neovascular diseases: a literature review显示文摘A large subset of corneal pathologies involves the formation of new vessels(neovascularization), leading to compromised visual acuity. This article aims to review the clinical causes and presentations of corneal neovascularization(CNV) by examining the mechanisms behind common CNV-related corneal pathologies, with a particular focus on herpes simplex stromal keratitis,contact lenses-induced keratitis and CNV secondary to keratoplasty. Moreover, we reviewed CNV in the context of different types of corneal transplantation and keratoprosthesis, and summarized the most relevant treatment available so far.Nizar Saleh Abdelfattah Mohamed Amgad Amira A Zayed Hamdy Salem Ahmed E Elkhanany Heba Hussein Nawal Abd El-Baky 2015International Journal of Ophthalmology(English edition)2015,8,1:10
3Development of an Arabic version of the National Eye Institute Visual Function Questionnaire as a tool to study eye diseases patients in Egypt显示文摘AIM:To develop and test an Arabic version of the National Eye Institute Visual Function Questionnaire-25(NEI-VFQ-25).METHODS:NEI-VFQ-25 was translated into Arabic according to WHO translation guidelines. We enrolled adult consenting patients with bilateral chronic eye diseases who presented to 14 hospitals across Egypt from October to December 2012, and documented their clinical findings. Psychometric properties were then tested using STATA.RESULTS:We recruited 379 patients, whose mean age was(54.5±15)y. Of 46.2% were males, 227 had cataract,31 had glaucoma, 23 had retinal detachment, 37 had diabetic retinopathy, and 61 had miscellaneous visual defects. Non-response rate and the floor and ceiling numbers of the Arabic version(ARB-VFQ-25) were calculated. Internal consistency was high in all subscales(except general health), with Cronbach-α ranging from0.702-0.911. Test-retest reliability was high(intraclass correlation coefficient 0.79).CONCLUSION:RB-VFQ-25 isareliableandvalidtool for assessing visual functions of Arabic speaking patients. However, some questions had high non-response rates and should be substituted by available alternatives. Our results support the importance of including self-reported visual functions as part of routine ophthalmologic examination.Nizar Saleh Abdelfattah Mohamed Amgad Ahmed A Salama Marina E Israel Ghada A Elhawary Ahmed E Radwan Mohamed M Elgayar Tamer M EL Nakhal Islam T Elkhateb Heba A Hashem Doha K Embaby Amira A Elabd Reem K Elwy Magdi S Yacoub Hamdy Salem Mohamed Abdel-Baqy Ahmad Kassem 2014International Journal of Ophthalmology(English edition)2014,7,5:8
4A New Sliding Function for Discrete Predictive Sliding Mode Control of Time Delay Systems显示文摘The control of time delay systems is still an open area for research. This paper proposes an enhanced model predictive discrete-time sliding mode control with a new sliding function for a linear system with state delay. Firstly, a new sliding function including a present value and a past value of the state, called dynamic surface, is designed by means of linear matrix inequalities (LMIs). Then, using this dynamic function and the rolling optimization method in the predictive control strategy, a discrete predictive sliding mode controller is synthesized. This new strategy is proposed to eliminate the undesirable effect of the delay term in the closed loop system. Also, the designed control strategy is more robust, and has a chattering reduction property and a faster convergence of the system s state. Finally, a numerical example is given to illustrate the effectiveness of the proposed control.Abdennebi Nizar Ben Mansour Houda Nouri Ahmed Said 2013International Journal of Automation and computing2013,10,4:8
5Characterization of chickpea germplasm conserved in the Indian National Genebank and development of a core set using qualitative and quantitative trait data显示文摘Chickpea is the third most important pulse crop as a source of dietary protein. Ever-increasing demand in Asian countries calls for breeding superior desi-type varieties, in turn necessitating the availability of characterized germplasm to breeders. The Indian National Genebank,located at the National Bureau of Plant Genetic Resources, New Delhi, conserves 14,651 accessions of chickpea. The entire set was characterized in a single large-scale experiment.High variation was observed for eight quantitative and 12 qualitative agro-morphological traits. Allelic richness procedure was employed to assemble a core set comprising 1103 accessions, 70.0% of which were of Indian origin. Comparable values of total variation explained by the first three principal components in the entire collection(51.1%) and the core(52.4%)together with conservation of nine pairwise r values among quantitative traits in the core collection and a coincidence rate around 99.7% indicated that the chickpea core was indeed an excellent representation of the entire chickpea collection in the National Genebank. The chickpea core exhibited greater diversity than the entire collection in agro-morphological traits, as assessed by higher variance and Shannon–Weaver diversity indices, indicating that the chickpea core maximized the phenotypic diversity available in the Indian chickpea germplasm. The chickpea core, comprising mainly indigenous desi genotypes, is expected to be an excellent resource for chickpea breeders. Information on the chickpea core can be accessed at http://www.nbpgr.ernet.in/pgrportal.Sunil Archak Rishi K.Tyagi P.N.Harer L.B.Mahase Neeta Singh Om P.Dahiya M.Abdul Nizar Mohar Singh Vrushali Tilekar Vikas Kumar Manoranjan Dutta Narendra P.Singh Kailash C.Bansal 2016The Crop Journal2016,4,5:7
6Recent advances in myeloid-derived suppressor cell biology显示文摘In recent years,studying the role of myeloid-derived suppressor cells(MDSCs)in many pathological inflammatory conditions has become a very active research area.Although the role of MDSCs in cancer is relatively well established,their role in non-cancerous pathological conditions remains in its infancy resulting in much confusion.Our objectives in this review are to address some recent advances in MDSC research in order to minimize such confusion and to provide an insight into their function in the context of other diseases.The following topics will be specifically focused upon:(1)definition and characterization of MDSCs;(2)whether all MDSC populations consist of immature cells;(3)technical issues in MDSC isolation,estimation and characterization;(4)the origin of MDSCs and their anatomical distribution in health and disease;(5)mediators of MDSC expansion and accumulation;(6)factors that determine the expansion of one MDSC population over the other;(7)the Yin and Yang roles of MDSCs.Moreover,the functions of MDSCs will be addressed throughout the text.Mahmoud Mohammad Yaseen Nizar Mohammad Abuharfeil Homa Darmani Ammar Daoud 2021Frontiers of Medicine2021,15,2:7
7Molecular underpinnings of corneal angiogenesis:advances over the past decade显示文摘The cornea is maintained in an avascular state by maintaining an environment whereby anti-angiogenic factors take the upper hand over factors promoting angiogenesis. Many of the common pathologies affecting the cornea involve the disruption of such equilibrium and the shift towards new vessel formation, leading to corneal opacity and eventually-vision loss. Therefore it is of paramount importance that the molecular underpinnings of corneal neovascularization(CNV) be clearly understood, in order to develop better targeted treatments. This article is a review of the literature on the recent discoveries regarding pro-angiogenic factors of the cornea(such as vascular endothelial growth factors,fibroblast growth factor and matrix metalloproteinases)and anti-angiogenic factors of the cornea(such as endostatins and neostatins). Further, we review the molecular underpinnings of lymphangiogenesis, a process now known to be almost separate from(yet related to) hemangiogenesis.Nizar Saleh Abdelfattah Mohamed Amgad Amira A.Zayed Heba Hussein Nawal AbdEl-Baky 2016International Journal of Ophthalmology(English edition)2016,9,5:6
8Host immune cellular reactions in corneal neovascularization显示文摘Corneal neovascularization(CNV) is a global important cause of visual impairment. The immune mechanisms leading to corneal heme- and lymphangiogenesis have been extensively studied over the past years as more attempts were made to develop better prophylactic and therapeutic measures. This article aims to discuss immune cells of particular relevance to CNV, with a focus on macrophages, Th17 cells, dendritic cells and the underlying immunology of common pathologies involving neovascularization of the cornea. Hopefully, a thorough understanding of these topics would propel the efforts to halt the detrimental effects of CNV.Nizar S.Abdelfattah Mohamed Amgad Amira A Zayed 2016International Journal of Ophthalmology(English edition)2016,9,4:5
9原发性免疫缺陷病易发生自身免疫病和炎症表现显示文摘研究背景原发性免疫缺陷病(PIDDs)是一种显著增加感染易感性的遗传性疾病。PIDDs可以导致肿瘤、免疫性疾病,包括过敏、自身免疫、炎症。目的研究PIDDs患者自身免疫病和炎症表现的发生率。方法回顾性筛查了2183例在CEREDIH (法国国家PID注册研究)注册登记的PIDDs患者自身免疫性疾病和炎症的表现。结果 26. 2%的患者并发了一种或多种自身免疫和炎症性表现,整个生存期均有发病的风险,其中免疫相关血细胞减少症的风险比一般人群高120倍以上,儿童炎症性肠病的风险高80倍以上,其他自身免疫表现的风险增高约10倍。值得注意的是,所有类型的PIDDs均与并发自身免疫病和炎症相关,其中T细胞相关PIDDs和普通变异型免疫缺陷病的风险最高。并发自身免疫性疾病是预后不良因素。结论我们的结果为前瞻性评估PIDDs并发自身免疫病和炎症表现奠定了基础,以期准确地评估这些风险和描述医疗干预可能的疗效。Alain Fischer Johan Provot Jean-Philippe Jais Alexandre Alcais Nizar Mahlaoui 彭琳一(翻译) 张奉春(审校) 2018中华临床免疫和变态反应杂志2018,12,2:5
10糖尿病对外科影响和围手术期管理的进展显示文摘随着人类寿命延长,人口老年化及生活模式改变等因素影响,糖尿病发病率逐年增长。文献各个报道高血糖与外科患者预后风险结果和结论不统一,为了手术安全进行,需要外科医师提高警惕。外科糖尿病患者围手术期血糖控制情况影响到麻醉,手术效果及术后全身恢复和切口愈合情况。手术前后以及当天术中规范处理高血糖,可提高手术成功和患者生活质量。Nizar Ahamada Said 燕敏 2013医学综述2013,19,20:5
11Management of achilles tendon injury: A current concepts systematic review显示文摘Achilles tendon rupture has been on the rise over recent years due to a variety of reasons. It is a debilitating injury with a protracted and sometimes incomplete recovery. Management strategy is a controversial topic and evidence supporting a definite approach is limited. Opinion is divided between surgical repair and conservative immobilisation in conjunction with functional orthoses. A systematic search of the literature was performed. Pubmed, Medline and EmB ase databases were searched for Achilles tendon and a variety of synonymous terms. A recent wealth of reporting suggests that conservative regimens with early weight bearing or mobilisation have equivalent or improved rates of re-rupture to operative regimes. The application of dynamic ultrasound assessment of tendon gap may prove crucial in minimising re-rupture and improving outcomes. Studies employing functional assessments have found equivalent function between operative and conservative treatments. However, no specific tests in peak power, push off strength or athletic performance have been reported and whether an advantage in operative treatment exists remains undetermined.Vivek Gulati Matthew Jaggard Shafic Said Al-Nammari Chika Uzoigwe Pooja Gulati Nizar Ismail Charles Gibbons Chinmay Gupte 2015World Journal of Orthopedics2015,6,4:5
12Myxedema ascites with high CA-125:Case and a review of literature显示文摘Ascites appearing in a previously healthy female patient is usually ascribed to a variety of causes,among which,is a cancerous process,especially if it comes with a raised CA-125 level.Although the CA-125 antigen is present on more than 80% of malignant epithelial ovarian tissue of non-mucinous type,it is also found on both healthy and malignant cells of mesothelial and non-mesothelial origin.Myxedema ascites which is caused by hypothyroidism is a rare entity,but on the other hand is easy to treat.It is one of the differential diagnoses when the ascites is refractory to treatment and no other obvious cause can be identified.If the diagnosis is delayed,patients will frequently receive unnecessary procedures,while treatment has very good response rates and ascites resolve with serum CA-125 normalization after adequate hormonal treatment.Bou Khalil Roula El Rassi Patrick Chammas Nizar Obeid Jean Ghabach Maroun Sakr Charles Itani Tarek Farhat Said 2013World Journal of Hepatology2013,5,2:4
13Impact of Intensive Greenhouse Production System on Soil Quality显示文摘Composite top- and subsoil samples were collected from the greenhouses in the Al-Balawneh area,Jordan,where intensive greenhouse production system(IGPS) has been practiced since 1998,to study the impact of IGPS on soil quality as measured by the chemical and biological properties to develop a sustainable production system.The study showed that IGPS led to higher electrical conductivity in top- and subsoils compared to an uncultivated soil(control).Quality and amount of irrigation water,lack of efficient drainage,and quantity and types of applied fertilizers were major factors resulting in salt buildup.IGPS resulted in lower total N(TN) and NO_3-N in the soil compared to the control.The lower TN was due to crop uptake,microbial immobilization,volatilization,and irregular application of composted animal manure or poultry manure.In contrast,higher residual Olsen-P content was detected in both soil layers of greenhouses than in the control.Residual P was classified as very high in the topsoil layers and sufficient to high in the subsoil layers.Residual available K in the soils of greenhouses was relatively lower than that in the control and it was,however,classified as high to very high.A large increase of Cl and a considerable decrease in the bacterial count were observed in both soil layers of IGPS compared to the control treatment.Economically sustainable soil management practices need to be adopted by farmers to achieve a sustainable and profitable production.This can be accomplished through education,targeted towards the farming community in the central Jordan Valley.Tarek G.AMMARI Ragheb TAHHAN Nizar AL SULEBI Alaedeen TAHBOUB Rakad A.TA'ANY Samih ABUBAKER 2015Pedosphere2015,25,2:4
14The incidence and risk factors of hepatocellular carcinoma in patients with nonalcoholic steatohepatitis显示文摘Mustafa S. Ascha Ibrahim A. Hanouneh Rocio Lopez Tarek Abu‐Rajab Tamimi Ariel F. Feldstein Nizar N. Zein 2010Hepatology2010,,6:4
15Histological abnormalities of the small bowel mucosa in cirrhosis and portal hypertension显示文摘AIM: To study the small bowel (SB) mucosa on biopsy in cirrhotic patients with portal hypertension and in non-cirrhotic controls and grade fi ndings according to the Marsh criteria. METHODS: We prospectively enrolled 51 consecutive patients undergoing an upper endoscopy for their routine medical care. Twenty f ive patients with cirrhosis and portal hypertension were compared to 26 controls. We obtained coeliac serology and multiple upper small bowel biopsies on all 51 patients. A GI pathologist interpreted biopsies and graded fi ndings according to the Marsh criteria. We assessed equivalence in Marsh grade between cirrhotic and non-cirrhotic controls using the Mann-Whitney test for equivalence. RESULTS: Gender, ethnicity and age were similar between both groups. Marsh grades were equivalent between the groups. Grade of 0 was present in 96% and grade of 1 was present in 4% of both groups and there was no villus atrophy or decrease in villus/crypt ratio in patients with portal hypertension. CONCLUSION: This study provides evidence for the lack of villus atrophy in patients with cirrhosis and portal hypertension, and supports the continuous reliance on the Marsh criteria when the diagnosis of coeliac disease is to be made in the presence of cirrhosis.Jamilé Wakim-Fleming Nizar N Zein Ana Bennett Rocio Lopez Janice Santisi William D Carey 2008World Journal of Gastroenterology2008,14,41:4
16Alpha-1 antitrypsin deficiency and the risk of hepatocellular carcinoma in end-stage liver disease显示文摘AIM:To evaluate the association between alpha-1 antitrypsin deficiency(A1ATD) and hepatocellular carcinoma(HCC) in patients with end-stage liver disease(ESLD).METHODS:Patients with cirrhosis and ESLD referred to the Cleveland Clinic Foundation for liver transplantation between 2003 and 2014 were included in the study(N = 675). ESLD was defined as having histological features of cirrhosis and/or radiological evidence of cirrhosis in the context of portal hypertension(ascites,variceal bleeding,thrombocytopenia,or hepatic encephalopathy). A1 ATD was diagnosed using phenotype characterization(MZ or ZZ),liver biopsy detection of PAS-positive diastaseresistant(PAS+) globules,or both. Patients with other causes of liver diseases such as hepatitis C virus(HCV),alcoholic liver disease and non-alcoholic steatohepatitis(NASH) or NASH were also included in the study. HCC was diagnosed by using imaging modalities,biopsy findings,or explanted liver inspection. Follow-up time was defined as the number of years from the diagnosis of cirrhosis to the diagnosis of hepatocellular carcinoma,or from the diagnosis of cirrhosis to the last follow up visit. The rate of HCC was assessed using time-tointerval analysis for interval censored data.RESULTS:This study included 675 patients. 7% of subjects had A1ATD(n = 47). Out of all subjects who did not have A1 ATD,46% had HCV,17% had alcoholic liver disease,19% had NASH and 18% had another primary diagnosis. Of the 47 subjects with A1 ATD,15 had a primary diagnosis of A1ATD(PI*ZZ phenotype and PAS+ globules),8 had a PI*MZ phenotype alone,14 had PAS+ alone,and 10 had both the PI*MZ phenotype and PAS+. Median follow-up time was 3.4(25th,75 th percentiles:1,5.2) years. The overall rate of hepatocellular carcinoma in all subjects was 29%(n = 199). In the A1 ATD group,the incidence rate of HCC was 8.5% compared to 31% in the group of patients with other causes of cirrhosis(P = 0.001). Patients with ESLD due to A1 ATD had the lowest yearly cumulative rate of hepatocellular carcinoma at 0.88% per year compared to 2.7% for those with HCV cirrhosis,1.5% in patients with NASH and 0.9% in alcohol-induced liver disease(P < 0.001).CONCLUSION:Within this group of patients with ESLD,there was no significant association between A1 ATD and increased risk of HCC.Clara Antoury Rocio Lopez Nizar Zein James K Stoller Naim Alkhouri 2015World Journal of Hepatology2015,7,10:3
17Risk of colonic neoplasia after liver transplantation for primary sclerosing cholangitis显示文摘Ibrahim A.Hanouneh CaroleMacaron RocioLopez Nizar N.Zein Bret A.Lashner 2012Inflamm Bowel Dis2012,,2:3
18Relapse of Inflammatory Bowel Disease Associated With Use of Nonsteroidal Anti-Inflammatory Drugs显示文摘Angela M. Meyer Nizar N. Ramzan Russell I. Heigh Jonathan A. Leighton 2006Digestive Diseases and Sciences2006,,:3
19Collision tumor of the kidney composed of clear cell carcinoma and collecting duct carcinoma: report of a case with unusual morphology and clinical follow-up显示文摘We report the case of a 67-year-old female who presented with a large renal mass. Gross examination of the nephrectomy specimen demonstrated a 6-cm renal mass that invaded into the renal sinus and perinephric fat. Histologic examination revealed two distinct tumor types. The first type was a conventional(clear cell) renal cell carcinoma that was of low nuclear grade and comprised the minority of the overall tumor. The second type was a high-grade collecting duct carcinoma with glandular/tubular differentiation and composed the majority of the tumor. Immunohistochemical studies demonstrated distinctive patterns of the two tumor types, thus confirming two distinct lineages. Five months postoperatively, the patient developed metastasis to the lungs and right hilar lymph node region. A fine needle aspiration of a lung nodule demonstrated a metastatic, poorly differentiated carcinoma, similar to the collecting duct carcinoma component in the kidney. Collision tumors of the kidney are rare with fewer than 10 cases reported in the literature. Our report further expands the spectrum of this rare phenomenon.Rhonda Burch-Smith Nizar M Tannir Erika Resetkova Pheroze Tamboli Priya Rao 2014Chinese Journal of Cancer2014,33,7:3
20Kaolin-based geopolymers with various NaOH concentrations显示文摘Kaolin geopolymers were produced by the alkali-activation of kaolin with an activator solution (a mixture of NaOH and sodium silicate solutions). The NaOH solution was prepared at a concentration of 6-14 mol/L and was mixed with the sodium silicate solution at a Na2SiO3 /NaOH mass ratio of 0.24 to prepare an activator solution. The kaolin-to-activator solution mass ratio used was 0.80. This paper aimed to analyze the effect of NaOH concentration on the compressive strength of kaolin geopolymers at 80℃for 1, 2, and 3 d. Kaolin geopolymers were stable in water, and strength results showed that the kaolin binder had adequate compressive strength with 12 mol/L of NaOH concentration. When the NaOH concentration increased, the SiO2/Na2O decreased. The increased Na2O content enhanced the dissolution of kaolin as shown in X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) analyses. However, excess in this content was not beneficial for the strength development of kaolin geopolymers. In addition, there was the formation of more geopolymeric gel in 12 mol/L samples. The XRD pattern of the samples showed a higher amorphous content and a more geopolymer bonding existed as proved by FTIR analysis.C.Y. Heah H. Kamarudin A.M. Mustafa Al Bakri M. Bnhussain M. Luqman I. Khairul Nizar C.M. Ruzaidi Y.M. Liew 2013International Journal of Minerals,Metallurgy and Materials2013,20,3:3
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