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Goldstein I, Alyas S, Asghar W, Ilyas A. Biosensors for the Isolation and Detection of Circulating Tumor Cells (CTCs) in Point-of-Care Settings. Micromachines (Basel) 2023; 14:mi14051035. [PMID: 37241658 DOI: 10.3390/mi14051035] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 05/02/2023] [Accepted: 05/04/2023] [Indexed: 05/28/2023]
Abstract
Circulating tumor cells (CTCs) are cells that have been shed from tumors and circulate in the bloodstream. These cells can also be responsible for further metastases and the spread of cancer. Taking a closer look and analyzing CTCs through what has come to be known as "liquid biopsy" has immense potential to further researchers' understanding of cancer biology. However, CTCs are very sparse and are therefore difficult to detect and capture. To combat this issue, researchers have attempted to create devices, assays, and further techniques to successfully isolate CTCs for analysis. In this work, new and existing biosensing techniques for CTC isolation, detection, and release/detachment are discussed and compared to evaluate their efficacy, specificity, and cost. Here, we specifically aim to evaluate and identify the potential success of these techniques and devices in point-of-care (POC) settings.
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Affiliation(s)
- Isaac Goldstein
- Bio-Nanotechnology and Biomaterials (BNB) Lab, New York Institute of Technology, Old Westbury, NY 11568, USA
- Paul D. Schreiber High School, Port Washington, NY 11050, USA
| | - Sobia Alyas
- Institute of Molecular Biology and Biotechnology (IMBB), The University of Lahore, Lahore 54000, Pakistan
| | - Waseem Asghar
- Department of Electrical Engineering and Computer Science, Florida Atlantic University, Boca Raton, FL 33431, USA
| | - Azhar Ilyas
- Bio-Nanotechnology and Biomaterials (BNB) Lab, New York Institute of Technology, Old Westbury, NY 11568, USA
- Department of Electrical and Computer Engineering, New York Institute of Technology, Old Westbury, NY 11568, USA
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Tharakan S, Raja I, Pietraru A, Sarecha E, Gresita A, Petcu E, Ilyas A, Hadjiargyrou M. The Use of Hydrogels for the Treatment of Bone Osteosarcoma via Localized Drug-Delivery and Tissue Regeneration: A Narrative Review. Gels 2023; 9:gels9040274. [PMID: 37102886 PMCID: PMC10137556 DOI: 10.3390/gels9040274] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 03/22/2023] [Accepted: 03/23/2023] [Indexed: 03/29/2023] Open
Abstract
Osteosarcoma is a malignant tumor of bone that leads to poor mortality and morbidity. Management of this cancer through conventional methods involves invasive treatment options that place patients at an increased risk of adverse events. The use of hydrogels to target osteosarcoma has shown promising results both in vitro and in vivo to eradicate tumor cells while promoting bone regeneration. The loading of hydrogels with chemotherapeutic drugs provides a route for site-specific targeted therapy for osteosarcoma. Current studies demonstrate tumor regression in vivo and lysis of tumor cells in vitro when exposed to doped hydrogel scaffolds. Additionally, novel stimuli-responsive hydrogels are able to react with the tissue microenvironment to facilitate the controlled release of anti-tumor drugs and with biomechanical properties that can be modulated. This narrative review of the current literature discusses both in vitro and in vivo studies of different hydrogels, including stimuli-responsive, designed to treat bone osteosarcoma. Future applications to address patient treatment for this bone cancer are also discussed.
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Affiliation(s)
- Shebin Tharakan
- College of Osteopathic Medicine, New York Institute of Technology, Old Westbury, NY 11568, USA (I.R.); (A.G.)
| | - Iman Raja
- College of Osteopathic Medicine, New York Institute of Technology, Old Westbury, NY 11568, USA (I.R.); (A.G.)
| | - Annette Pietraru
- Department of Biological and Chemical Sciences, New York Institute of Technology, Old Westbury, NY 11568, USA
| | - Elina Sarecha
- Department of Biological and Chemical Sciences, New York Institute of Technology, Old Westbury, NY 11568, USA
| | - Andrei Gresita
- College of Osteopathic Medicine, New York Institute of Technology, Old Westbury, NY 11568, USA (I.R.); (A.G.)
| | - Eugen Petcu
- College of Osteopathic Medicine, New York Institute of Technology, Old Westbury, NY 11568, USA (I.R.); (A.G.)
| | - Azhar Ilyas
- Department of Electrical and Computing Engineering, New York Institute of Technology, Old Westbury, NY 11568, USA
| | - Michael Hadjiargyrou
- Department of Biological and Chemical Sciences, New York Institute of Technology, Old Westbury, NY 11568, USA
- Correspondence: ; Tel.: +1-516-686-7738
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Tharakan S, Khondkar S, Lee S, Ahn S, Mathew C, Gresita A, Hadjiargyrou M, Ilyas A. 3D Printed Osteoblast-Alginate/Collagen Hydrogels Promote Survival, Proliferation and Mineralization at Low Doses of Strontium Calcium Polyphosphate. Pharmaceutics 2022; 15:pharmaceutics15010011. [PMID: 36678641 PMCID: PMC9865428 DOI: 10.3390/pharmaceutics15010011] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/11/2022] [Accepted: 12/15/2022] [Indexed: 12/24/2022] Open
Abstract
The generation of biomaterials via 3D printing is an emerging biotechnology with novel methods that seeks to enhance bone regeneration. Alginate and collagen are two commonly used biomaterials for bone tissue engineering and have demonstrated biocompatibility. Strontium (Sr) and Calcium phosphate (CaP) are vital elements of bone and their incorporation in composite materials has shown promising results for skeletal repair. In this study, we investigated strontium calcium polyphosphate (SCPP) doped 3D printed alginate/collagen hydrogels loaded with MC3T3-E1 osteoblasts. These cell-laden scaffolds were crosslinked with different concentrations of 1% SCPP to evaluate the effect of strontium ions on cell behavior and the biomaterial properties of the scaffolds. Through scanning electron microscopy and Raman spectroscopy, we showed that the scaffolds had a granular surface topography with the banding pattern of alginate around 1100 cm-1 and of collagen around 1430 cm-1. Our results revealed that 2 mg/mL of SCPP induced the greatest scaffold degradation after 7 days and least amount of swelling after 24 h. Exposure of osteoblasts to SCPP induced severe cytotoxic effects after 1 mg/mL. pH analysis demonstrated acidity in the presence of SCPP at a pH between 2 and 4 at 0.1, 0.3, 0.5, and 1 mg/mL, which can be buffered with cell culture medium. However, when the SCPP was added to the scaffolds, the overall pH increased indicating intrinsic activity of the scaffold to buffer the SCPP. Moreover, cell viability was observed for up to 21 days in scaffolds with early mineralization at 0.3, 0.5, and 1 mg/mL of SCPP. Overall, low doses of SCPP proved to be a potential additive in biomaterial approaches for bone tissue engineering; however, the cytotoxic effects due to its pH must be monitored closely.
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Affiliation(s)
- Shebin Tharakan
- Bio-Nanotechnology and Biomaterials (BNB) Lab, New York Institute of Technology, Old Westbury, NY 11568, USA
- College of Osteopathic Medicine, New York Institute of Technology, Old Westbury, NY 11568, USA
| | - Shams Khondkar
- Bio-Nanotechnology and Biomaterials (BNB) Lab, New York Institute of Technology, Old Westbury, NY 11568, USA
- Department of Bioengineering, New York Institute of Technology, Old Westbury, NY 11568, USA
| | - Sally Lee
- Bio-Nanotechnology and Biomaterials (BNB) Lab, New York Institute of Technology, Old Westbury, NY 11568, USA
- Department of Biological and Chemical Sciences, New York Institute of Technology, Old Westbury, NY 11568, USA
| | - Serin Ahn
- Bio-Nanotechnology and Biomaterials (BNB) Lab, New York Institute of Technology, Old Westbury, NY 11568, USA
- Department of Biological and Chemical Sciences, New York Institute of Technology, Old Westbury, NY 11568, USA
| | - Chris Mathew
- Bio-Nanotechnology and Biomaterials (BNB) Lab, New York Institute of Technology, Old Westbury, NY 11568, USA
- Department of Biological and Chemical Sciences, New York Institute of Technology, Old Westbury, NY 11568, USA
| | - Andrei Gresita
- College of Osteopathic Medicine, New York Institute of Technology, Old Westbury, NY 11568, USA
| | - Michael Hadjiargyrou
- Department of Biological and Chemical Sciences, New York Institute of Technology, Old Westbury, NY 11568, USA
- Correspondence: (M.H.); (A.I.)
| | - Azhar Ilyas
- Bio-Nanotechnology and Biomaterials (BNB) Lab, New York Institute of Technology, Old Westbury, NY 11568, USA
- Department Electrical and Computer Engineering, New York Institute of Technology, Old Westbury, NY 11568, USA
- Correspondence: (M.H.); (A.I.)
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Tharakan S, Faqah O, Asghar W, Ilyas A. Microfluidic Devices for HIV Diagnosis and Monitoring at Point-of-Care (POC) Settings. Biosensors (Basel) 2022; 12:949. [PMID: 36354458 PMCID: PMC9687700 DOI: 10.3390/bios12110949] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 10/19/2022] [Accepted: 10/27/2022] [Indexed: 06/16/2023]
Abstract
Human immunodeficiency virus (HIV) is a global epidemic; however, many individuals are able to obtain treatment and manage their condition. Progression to acquired immunodeficiency syndrome (AIDS) occurs during late-stage HIV infection, which compromises the immune system, making it susceptible to infections. While there is no cure, antiretroviral therapy can be used provided that detection occurs, preferably during the early phase. However, the detection of HIV is expensive and resource-intensive when tested with conventional methods, such as flow cytometry, polymerase chain reaction (PCR), or enzyme-linked immunosorbent assays (ELISA). Improving disease detection in resource-constrained areas requires equipment that is affordable, portable, and can deliver rapid results. Microfluidic devices have transformed many benchtop techniques to on-chip detection for portable and rapid point-of-care (POC) testing. These devices are cost-effective, sensitive, and rapid and can be used in areas lacking resources. Moreover, their functionality can rival their benchtop counterparts, making them efficient for disease detection. In this review, we discuss the limitations of currently used conventional HIV diagnostic assays and provide an overview of potential microfluidic technologies that can improve HIV testing in POC settings.
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Affiliation(s)
- Shebin Tharakan
- Bio-Nanotechnology and Biomaterials (BNB) Lab, New York Institute of Technology, Old Westbury, NY 11568, USA
- Department of Biological & Chemical Sciences, New York Institute of Technology, Old Westbury, NY 11568, USA
| | - Omair Faqah
- Department of Electrical Engineering and Computer Science, Florida Atlantic University, Boca Raton, FL 33431, USA
| | - Waseem Asghar
- Department of Electrical Engineering and Computer Science, Florida Atlantic University, Boca Raton, FL 33431, USA
| | - Azhar Ilyas
- Bio-Nanotechnology and Biomaterials (BNB) Lab, New York Institute of Technology, Old Westbury, NY 11568, USA
- Department of Electrical and Computer Engineering, New York Institute of Technology, Old Westbury, NY 11568, USA
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Khondkar S, Tharakan S, Badran A, Hadjiargyrou M, Ilyas A. Controlled Biodegradation and Swelling of Strontium-doped Alginate/Collagen Scaffolds for Bone Tissue Engineering. Annu Int Conf IEEE Eng Med Biol Soc 2022; 2022:1561-1564. [PMID: 36086517 DOI: 10.1109/embc48229.2022.9871871] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Treatment for critical size defects (CSDs) in bone often use bone grafts to act as a scaffold to help complete healing. Biological scaffolds require bone extraction from the individual or an outside donor while synthetic grafts mostly suffer from poor degradation kinetics and decreased bioactivity. In this study, we investigated a 3D printed scaffold derived from a novel composite bioink composed of alginate and collagen augmented with varying doses from 2 m g/ m L to 20 m g/ m L of 1% strontium-calcium polyphosphate (SCPP) to control biodegradability and fluid uptake. Scaffolds with increased SCPP concentrations showed higher particle density, lesser swelling ratio and greater biodegradability indicating that these critically important properties for bone healing are fine-tunable and highly dependent on SCPP dosing. Clinical Relevance- The dosing of 1% SCPP into porous alginate/collagen scaffolds provides adjustable long-term degradation and material properties suitable for potential in vivo CSD applications.
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Tharakan S, Khondkar S, Ilyas A. Bioprinting of Stem Cells in Multimaterial Scaffolds and Their Applications in Bone Tissue Engineering. Sensors (Basel) 2021; 21:7477. [PMID: 34833553 PMCID: PMC8618842 DOI: 10.3390/s21227477] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 10/26/2021] [Accepted: 11/05/2021] [Indexed: 12/14/2022]
Abstract
Bioprinting stem cells into three-dimensional (3D) scaffolds has emerged as a new avenue for regenerative medicine, bone tissue engineering, and biosensor manufacturing in recent years. Mesenchymal stem cells, such as adipose-derived and bone-marrow-derived stem cells, are capable of multipotent differentiation in a 3D culture. The use of different printing methods results in varying effects on the bioprinted stem cells with the appearance of no general adverse effects. Specifically, extrusion, inkjet, and laser-assisted bioprinting are three methods that impact stem cell viability, proliferation, and differentiation potential. Each printing method confers advantages and disadvantages that directly influence cellular behavior. Additionally, the acquisition of 3D bioprinters has become more prominent with innovative technology and affordability. With accessible technology, custom 3D bioprinters with capabilities to print high-performance bioinks are used for biosensor fabrication. Such 3D printed biosensors are used to control conductivity and electrical transmission in physiological environments. Once printed, the scaffolds containing the aforementioned stem cells have a significant impact on cellular behavior and differentiation. Natural polymer hydrogels and natural composites can impact osteogenic differentiation with some inducing chondrogenesis. Further studies have shown enhanced osteogenesis using cell-laden scaffolds in vivo. Furthermore, selective use of biomaterials can directly influence cell fate and the quantity of osteogenesis. This review evaluates the impact of extrusion, inkjet, and laser-assisted bioprinting on adipose-derived and bone-marrow-derived stem cells along with the effect of incorporating these stem cells into natural and composite biomaterials.
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Affiliation(s)
- Shebin Tharakan
- Bio-Nanotechnology and Biomaterials (BNB) Lab, New York Institute of Technology, Old Westbury, NY 11568, USA; (S.T.); (S.K.)
- New York Institute of Technology, College of Osteopathic Medicine, Old Westbury, NY 11568, USA
| | - Shams Khondkar
- Bio-Nanotechnology and Biomaterials (BNB) Lab, New York Institute of Technology, Old Westbury, NY 11568, USA; (S.T.); (S.K.)
- Department of Bioengineering, New York Institute of Technology, Old Westbury, NY 11568, USA
| | - Azhar Ilyas
- Bio-Nanotechnology and Biomaterials (BNB) Lab, New York Institute of Technology, Old Westbury, NY 11568, USA; (S.T.); (S.K.)
- Department of Electrical and Computer Engineering, New York Institute of Technology, Old Westbury, NY 11568, USA
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Foreman PM, Ilyas A, Cress MC, Vachhani JA, Hirschl RA, Agee B, Griessenauer CJ. Ruptured Intracranial Aneurysms Treated with the Pipeline Embolization Device: A Systematic Review and Pooled Analysis of Individual Patient Data. AJNR Am J Neuroradiol 2021; 42:720-725. [PMID: 33602746 DOI: 10.3174/ajnr.a7002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 10/08/2020] [Accepted: 11/02/2020] [Indexed: 12/20/2022]
Abstract
BACKGROUND The Pipeline Embolization Device (PED) is a flow-diverting stent for the treatment of intracranial aneurysms and is used off-label for a subset of ruptured aneurysms not amenable to traditional treatment. PURPOSE Our aim was to evaluate the safety and efficacy of the PED for treatment of ruptured intracranial aneurysms. DATA SOURCES A systematic review of the MEDLINE, EMBASE, and Scopus data bases from January 2011 to March 2020 was performed for articles reporting treatment of ruptured intracranial aneurysms with the PED. STUDY SELECTION A total of 12 studies comprising 145 patients with 145 treated aneurysms were included for analysis. DATA ANALYSIS Individual patient data were collected. Nonparametric tests were used to compare differences among patients. Logistic regression was used to determine an association with outcome variables. DATA SYNTHESIS Mean aneurysm size was 5.9 mm, and most were blister (51.0%) or dissecting (26.9%) in morphology. Three (2.1%) aneurysms reruptured following PED placement. Univariate logistic regression identified larger aneurysm size as a significant predictor of aneurysm rerupture (P = .008). Of patients with radiographic follow-up, 87.5% had complete aneurysm occlusion. Symptomatic neurologic complications occurred in 16.5%. LIMITATIONS Analysis was limited by the quality of the included data, most of which were from small case series representing class III medical evidence. No study assessed outcome in a blinded or independently adjudicated manner. CONCLUSIONS Most ruptured aneurysms treated with the PED were blister or dissecting aneurysms. Treatment was associated with a rerupture rate of 2.1% and a complete occlusion rate of 87.5%.
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Affiliation(s)
- P M Foreman
- From the Neuroscience and Rehabilitation Institute (P.M.F., M.C.C., J.A.V., R.A.H.), Orlando Health, Orlando, Florida
| | - A Ilyas
- Department of Neurosurgery (A.I., B.A.), University of Alabama at Birmingham, Birmingham, Alabama
| | - M C Cress
- From the Neuroscience and Rehabilitation Institute (P.M.F., M.C.C., J.A.V., R.A.H.), Orlando Health, Orlando, Florida
| | - J A Vachhani
- From the Neuroscience and Rehabilitation Institute (P.M.F., M.C.C., J.A.V., R.A.H.), Orlando Health, Orlando, Florida
| | - R A Hirschl
- From the Neuroscience and Rehabilitation Institute (P.M.F., M.C.C., J.A.V., R.A.H.), Orlando Health, Orlando, Florida
| | - B Agee
- Department of Neurosurgery (A.I., B.A.), University of Alabama at Birmingham, Birmingham, Alabama
| | - C J Griessenauer
- Department of Neurosurgery (C.J.G.), Geisinger Health System, Danville, Pennsylvania
- Research Institute of Neurointervention (C.J.G.), Paracelsus Medical University, Salzburg, Austria
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Blacksburg S, Sheu R, Carpenter T, Repka M, Demircioglu G, Witten M, Mendez C, Auto H, Shin W, Zafar S, Ilyas A, Haas J. Obstructive Uropathy after Prostate SBRT is Rare: Characterizing Clinical and Dosimetric Predictors From a Large Patient Cohort. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Blacksburg S, Sheu R, Carpenter T, Demircioglu G, Witten M, Mendez C, Ilyas A, Dodin F, Chieng T, Garbus J, Pappas D, Haas J. Low Body Mass Index As a Risk Factor for Long-Term Proctitis after Prostate SBRT: Assessing the Dosimetric and Clinical Implications. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Alyas S, Roohi N, Ahmed S, Ashraf S, Ilyas S, Ilyas A. Lower vitamin D and sex hormone binding globulin levels and higher progesterone, cortisol and t-PA levels in early second trimester are associated with higher risk of developing gestational diabetes mellitus. J BIOL REG HOMEOS AG 2020; 34:51. [PMID: 32103657 DOI: 10.23812/20-35-l] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- S Alyas
- Physiology/Endocrinology Laboratory, Department of Zoology, University of the Punjab, Lahore, Punjab, Pakistan
- Institute of Molecular Biology and Biotechnology (IMBB), University of Lahore, Punjab, Pakistan
| | - N Roohi
- Physiology/Endocrinology Laboratory, Department of Zoology, University of the Punjab, Lahore, Punjab, Pakistan
| | - S Ahmed
- King Edward Medical University, Neela Gumbad, Anarkali, Lahore, Punjab, Pakistan
| | - S Ashraf
- Physiology/Endocrinology Laboratory, Department of Zoology, University of the Punjab, Lahore, Punjab, Pakistan
| | - S Ilyas
- Department of Pediatrics, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - A Ilyas
- Bio-nanotechnology and Biomaterials (BNB) Lab
- Department of Electrical and Computer Engineering, New York Institute of Technology, Old Westbury, NY, United States
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Alyas S, Roohi N, Ashraf S, Ilyas S, Ilyas A. Early pregnancy biochemical markers of placentation for screening of gestational diabetes mellitus (GDM). Diabetes Metab Syndr 2019; 13:2353-2356. [PMID: 31405642 DOI: 10.1016/j.dsx.2019.06.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [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] [Received: 05/08/2019] [Accepted: 06/07/2019] [Indexed: 12/16/2022]
Abstract
For the effective management and screening of patients with diabetes, lipid profile has been a useful mean. Here, we hypothesized that biochemical analyses of blood serum in pregnant women with GDM will develop an insight on the pathogenesis of the disease and possibly uncover new biomarkers. In order to test our hypothesis, antenatal pregnant women (n = 300) were selected for blood samples including 176 with positive clinical/family history and 124 with negative clinical/family history of GDM during the early second trimester (14-18 weeks of gestation). All the subjects were followed up to the early third trimester (24-28 weeks of gestation) for second sampling until the onset of GDM. Lipid profile data shows that mean values of triglycerides, total cholesterol, low density lipids and very low density lipids were significantly higher (p < 0.05) and mean HDL was significantly lower in early second trimester in those patients who subsequently developed GDM during late third trimester when compared with those who didn't develop GDM. Inflammatory biomarker such as High-sensitivity C-reactive protein (hs-CRP) levels were also found to be significantly higher by 69% increase in patients who developed GDM later in third trimester in comparison with those who didn't develop. About 32% patients who finally developed GDM belonged to positive clinical/family history group. The results of our study indicate that abnormal serum cholesterol; triglycerides, HDL, LDL, VLDL and hs-CRP play a vital in pathophysiology of gestational diabetes. Early diagnosis of GDM based on these biochemical markers will help decrease adverse neonatal and maternal outcomes.
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Affiliation(s)
- Sobia Alyas
- Physiology/Endocrinology Laboratory, Department of Zoology, University of the Punjab, Lahore, 54590, Punjab, Pakistan; Institute of Molecular Biology and Biotechnology (IMBB), The University of Lahore, 54000, Punjab, Pakistan
| | - Nabila Roohi
- Physiology/Endocrinology Laboratory, Department of Zoology, University of the Punjab, Lahore, 54590, Punjab, Pakistan
| | - Samina Ashraf
- Physiology/Endocrinology Laboratory, Department of Zoology, University of the Punjab, Lahore, 54590, Punjab, Pakistan
| | - Sadaf Ilyas
- Physiology/Endocrinology Laboratory, Department of Zoology, University of the Punjab, Lahore, 54590, Punjab, Pakistan
| | - Azhar Ilyas
- Bio-nanotechnology and Biomaterials (BNB) Lab, Old Westbury, NY, 1568, USA; Department of Electrical and Computer Engineering, New York Institute of Technology, Old Westbury, NY, 1568, USA.
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Ilyas A, Velton M, Shah A, Monte F, Kim HK, Aswath PB, Varanasi VG. Rapid Regeneration of Vascularized Bone by Nanofabricated Amorphous Silicon Oxynitrophosphide (SiONP) Overlays. J Biomed Nanotechnol 2019; 15:1241-1255. [PMID: 31072432 PMCID: PMC9841885 DOI: 10.1166/jbn.2019.2779] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Fracture healing is a complex biological process. Severe bone loss and ischemia from traumatic fractures lead to inflammation and accumulation of damaging reactive oxygen species (ROS). Fixative devices that not only provide mechanical support but also stimulate antioxidants such as superoxide dismutase (SOD1) and influence signaling pathways for extracellular matrix (ECM) mineralization, are critical for normal healing of such fractures. In this study, we report a novel biomaterial, silicon oxynitrophosphide (SiONP) that provides sustained release of ionic silicon (Si+4) and phosphorous (P) over few weeks under physiological conditions. Anti-oxidant role of Si+4 and augmented ECM mineralization by P ions lead to enhanced osteogenesis coupled with quick revascularization for rapid bone regeneration. Plasma enhanced chemical vapor deposition (PECVD) provided a conformal, well adherent and highly reproducible surface chemistry overlaid onto nanofabricated bioinspired surfaces. The Nitrogen to P and O content ratio was observed to change the dissolution rate and the release kinetics of the overlaid film. The SiONP films with optimal release kinetics promoted anti-oxidant expression via enhanced SOD1, which downstream upregulated other osteogenic markers with MC3T3-E1 cells. These surfaces also promoted angiogenesis evident by formation of thicker tubules by Human umbilical vein endothelial cells (HUVEC). In-vivo evaluation using a rat critical-sized calvarial defect model showed rapid bone-regeneration for these nanofabricated biomaterials as compared to control groups, and opens new horizon for future clinical trials of new antioxidant materials on biomedical devices that can reduce healing time, lower medical care cost, and increase the quality of newly formed bone in critical size defects.
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Affiliation(s)
- Azhar Ilyas
- Bio-nanotechnology and Biomaterials (BNB) Lab, College of Engineering and Computing Sciences, New York Institute of Technology, Old Westbury, NY 11568, USA,Department of Electrical and Computer Engineering, New York Institute of Technology, Old Westbury, NY 11568, USA
| | - Megen Velton
- Department of Materials Science and Engineering, University of Texas at Arlington, Arlington Texas 76019, USA
| | - Ami Shah
- Department of Materials Science and Engineering, University of Texas at Arlington, Arlington Texas 76019, USA
| | - Felipe Monte
- Department of Bioengineering, University of Texas at Arlington, Arlington Texas 76019, USA,Center for Excellence in Hip Disorders, Texas Scottish Rite Hospital, Dallas, TX 75219, USA
| | - Harry K.W. Kim
- Center for Excellence in Hip Disorders, Texas Scottish Rite Hospital, Dallas, TX 75219, USA,Department of Orthopaedic Surgery, University of Texas Southwestern Medical Center at Dallas, Dallas, TX 75390, USA
| | - Pranesh B. Aswath
- Department of Materials Science and Engineering, University of Texas at Arlington, Arlington Texas 76019, USA
| | - Venu G. Varanasi
- Department of Materials Science and Engineering, University of Texas at Arlington, Arlington Texas 76019, USA,Department of Graduate Nursing, College of Nursing and Health innovation, University of Texas at Arlington, TX 76019, USA, To whom correspondence should be addressed: Venu G. Varanasi, Ph.D., 411 S. Nedderman Drive, Arlington, TX 76019, USA, Phone: +1-817-272-2776 Fax: +1-817-272-5006,
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Sharma S, Zhuang R, Long M, Pavlovic M, Kang Y, Ilyas A, Asghar W. Circulating tumor cell isolation, culture, and downstream molecular analysis. Biotechnol Adv 2018; 36:1063-1078. [PMID: 29559380 DOI: 10.1016/j.biotechadv.2018.03.007] [Citation(s) in RCA: 129] [Impact Index Per Article: 21.5] [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: 06/06/2017] [Revised: 03/07/2018] [Accepted: 03/12/2018] [Indexed: 12/12/2022]
Abstract
Circulating tumor cells (CTCs) are a major contributor of cancer metastases and hold a promising prognostic significance in cancer detection. Performing functional and molecular characterization of CTCs provides an in-depth knowledge about this lethal disease. Researchers are making efforts to design devices and develop assays for enumeration of CTCs with a high capture and detection efficiency from whole blood of cancer patients. The existing and on-going research on CTC isolation methods has revealed cell characteristics which are helpful in cancer monitoring and designing of targeted cancer treatments. In this review paper, a brief summary of existing CTC isolation methods is presented. We also discuss methods of detaching CTC from functionalized surfaces (functional assays/devices) and their further use for ex-vivo culturing that aid in studies regarding molecular properties that encourage metastatic seeding. In the clinical applications section, we discuss a number of cases that CTCs can play a key role for monitoring metastases, drug treatment response, and heterogeneity profiling regarding biomarkers and gene expression studies that bring treatment design further towards personalized medicine.
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Affiliation(s)
- Sandhya Sharma
- Department of Computer & Electrical Engineering and Computer Science, Florida Atlantic University, Boca Raton, FL 33431, USA; Asghar-Lab, Micro and Nanotechnology in Medicine, College of Engineering and Computer Science, Boca Raton, FL 33431, USA
| | - Rachel Zhuang
- Asghar-Lab, Micro and Nanotechnology in Medicine, College of Engineering and Computer Science, Boca Raton, FL 33431, USA
| | - Marisa Long
- Asghar-Lab, Micro and Nanotechnology in Medicine, College of Engineering and Computer Science, Boca Raton, FL 33431, USA
| | - Mirjana Pavlovic
- Department of Computer & Electrical Engineering and Computer Science, Florida Atlantic University, Boca Raton, FL 33431, USA
| | - Yunqing Kang
- Department of Ocean & Mechanical Engineering, College of Engineering and Computer Science, Florida Atlantic University, Boca Raton, FL 33431, USA; Department of Biomedical Science, College of Medicine, Florida Atlantic University, Boca Raton, FL 33431, USA
| | - Azhar Ilyas
- Department of Electrical & Computer Engineering, New York Institute of Technology, Old Westbury, NY 11568, USA
| | - Waseem Asghar
- Department of Computer & Electrical Engineering and Computer Science, Florida Atlantic University, Boca Raton, FL 33431, USA; Asghar-Lab, Micro and Nanotechnology in Medicine, College of Engineering and Computer Science, Boca Raton, FL 33431, USA; Department of Biological Sciences, Florida Atlantic University, Boca Raton, FL 33431, USA.
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Varanasi VG, Ilyas A, Velten MF, Shah A, Lanford WA, Aswath PB. Role of Hydrogen and Nitrogen on the Surface Chemical Structure of Bioactive Amorphous Silicon Oxynitride Films. J Phys Chem B 2017; 121:8991-9005. [PMID: 28825836 PMCID: PMC6542473 DOI: 10.1021/acs.jpcb.7b05885] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Silicon oxynitride (Si-O-N) is a new biomaterial in which its O/N ratio is tunable for variable Si release and its subsequent endocytotic incorporation into native hydroxyapatite for enhanced bone healing. However, the effect of nitrogen and hydrogen bonding on the formation and structure of hydroxyapatite is unclear. This study aims to uncover the roles of H and N in tuning Si-O-N surface bioactivity for hydroxyapatite formation. Conformal Si-O-N films were fabricated by plasma-enhanced chemical vapor deposition (PECVD) onto Ti/Si substrates. Fourier transform infrared spectroscopy (FTIR) and Rutherford backscattering spectrometry (RBS) analysis indicated increased Si-H and N-H bonding with increased N content. Surface energy decreased with increased N content. X-ray absorbance near edge structure (XANES) analysis showed tetrahedral coordination in O-rich films and trigonal coordination in N-rich films. O-rich films exhibited a 1:1 ratio of 2p3/2 to 2p1/2 electron absorbance, while this ratio was 1.73:1 for N-rich films. Both Si and N had a reduced partial charge for both O- and N-rich films, whereas O maintained its partial charge for either film. O-rich films were found to exhibit random bonding SizOxNy, while N-rich films exhibited random mixing: [Si-Si]-[Si-O]-[Si-N]. Thus, hydrogen bonding limits random nitrogen bonding in Si-O-N films via surface Si-H and N-H bonding. Moreover, increased nitrogen content reduces the partial charge of constituent elements and changes the bonding structure from random bonding to random mixing.
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Affiliation(s)
- Venu G Varanasi
- Department of Biomedical Sciences, Texas A&M Health Science Center, College of Dentistry , Dallas, Texas 75246, United States
| | - Azhar Ilyas
- Department of Electrical and Computer Engineering, New York Institute of Technology , Old Westbury, New York, 11568, United States
| | - Megen F Velten
- Materials Science and Engineering Department, University of Texas at Arlington , Arlington, Texas 76019, United States
| | - Ami Shah
- Materials Science and Engineering Department, University of Texas at Arlington , Arlington, Texas 76019, United States
| | - William A Lanford
- Physics Department, University at Albany SUNY , 1400 Washington Avenue, Albany, New York 12222, United States
| | - Pranesh B Aswath
- Materials Science and Engineering Department, University of Texas at Arlington , Arlington, Texas 76019, United States
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15
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Ilyas A, Odatsu T, Shah A, Monte F, Kim HKW, Kramer P, Aswath PB, Varanasi VG. Amorphous Silica: A New Antioxidant Role for Rapid Critical-Sized Bone Defect Healing. Adv Healthc Mater 2016; 5:2199-213. [PMID: 27385056 PMCID: PMC6635139 DOI: 10.1002/adhm.201600203] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Revised: 05/25/2016] [Indexed: 12/23/2022]
Abstract
Traumatic fractures cause structurally unstable sites due to severe bone loss. Such fractures generate a high yield of reactive oxygen species (ROS) that can lead to oxidative stress. Excessive and prolonged ROS activity impedes osteoblast differentiation and instigates long healing times. Stimulation of antioxidants such as superoxide dismutase (SOD1), are crucial to reduce ROS, stimulate osteogenesis, and strengthen collagen and mineral formation. Yet, no current fixative devices have shown an ability to enhance collagen matrix formation through antioxidant expression. This study reports plasma-enhanced chemical vapor deposition based amorphous silicon oxynitride (Si(ON)x) as a potential new fracture healing biomaterial that adheres well to the implant surface, releases Si(+4) to enhance osteogenesis, and forms a surface hydroxyapatite for collagen mineral attachment. These materials provide a sustained release of Si(+4) in physiological environment for extended times. The dissolution rate partially depends on the film chemistry and can be controlled by varying O/N ratio. The presence of Si(+4) enhances SOD1, which stimulates other osteogenic markers downstream and leads to rapid mineral formation. In vivo testing using a rat critical-sized calvarial defect model shows a more rapid bone-regeneration for these biomaterials as compared to control groups, that implies the clinical significance of the presented biomaterial.
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Affiliation(s)
- Azhar Ilyas
- Department of Biomedical Sciences, Texas A&M University, Baylor College of Dentistry, Dallas, TX, 75246, USA
| | - Tetsuro Odatsu
- Department of Biomedical Sciences, Texas A&M University, Baylor College of Dentistry, Dallas, TX, 75246, USA
- Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, 1-7-1, Sakamoto, Nagasaki, 852-8588, Japan
| | - Ami Shah
- Department of Materials Science and Engineering, University of Texas at Arlington, Arlington, TX, 76019, USA
| | - Felipe Monte
- Department of Bioengineering, University of Texas at Arlington, Arlington, TX, 76019, USA
- Center for Excellence in Hip Disorders, Texas Scottish Rite Hospital, Dallas, TX, 75219, USA
| | - Harry K W Kim
- Center for Excellence in Hip Disorders, Texas Scottish Rite Hospital, Dallas, TX, 75219, USA
- Department of Orthopaedic Surgery, University of Texas Southwestern Medical Center at Dallas, Dallas, TX, 75390, USA
| | - Philip Kramer
- Department of Biomedical Sciences, Texas A&M University, Baylor College of Dentistry, Dallas, TX, 75246, USA
| | - Pranesh B Aswath
- Department of Materials Science and Engineering, University of Texas at Arlington, Arlington, TX, 76019, USA
| | - Venu G Varanasi
- Department of Biomedical Sciences, Texas A&M University, Baylor College of Dentistry, Dallas, TX, 75246, USA.
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Ali W, Ilyas A, Bui L, Sayles B, Hur Y, Kim YT, Iqbal SM. Differentiating Metastatic and Non-metastatic Tumor Cells from Their Translocation Profile through Solid-State Micropores. Langmuir 2016; 32:4924-4934. [PMID: 27035212 DOI: 10.1021/acs.langmuir.6b00016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Cancer treatment, care, and outcomes are much more effective if started at early stages of the disease. The presence of malignant cancer cells in human samples such as blood or biopsied tissue can be used to reduce overtreatment and underdiagnosis as well as for prognosis monitoring. Reliable quantification of metastatic tumor cells (MTCs) and non-metastatic tumor cells (NMTCs) from human samples can help in cancer staging as well. We report a simple, fast, and reliable approach to identify and quantify metastatic and non-metastatic cancer cells from whole biological samples in a point-of-care manner. The metastatic (MDA MB-231) and non-metastatic (MCF7) breast cancer cells were pushed through a solid-state micropore made in a 200 nm thin SiO2 membrane while measuring current across the micropore. The cells generated very distinctive translocation profiles. The translocation differences stemmed from their peculiar mechanophysical properties. The detection efficiency of the device for each type of tumor cells was ∼75%. MTCs showed faster translocation (36%) and 34% less pore blockage than NMTCs. The micropore approach is simple, exact, and quantitative for metastatic cell detection in a lab-on-a chip setting, without the need for any preprocessing of the sample.
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Affiliation(s)
| | | | | | | | | | - Young-Tae Kim
- Department of Urology, University of Texas Southwestern Medical Center at Dallas , Dallas, Texas 75235, United States
| | - Samir M Iqbal
- Department of Urology, University of Texas Southwestern Medical Center at Dallas , Dallas, Texas 75235, United States
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Ilyas A, Persson KM, Persson M. Residual organic matter and microbial respiration in bottom ash: Effects on metal leaching and eco-toxicity. Waste Manag Res 2015; 33:805-811. [PMID: 25999368 DOI: 10.1177/0734242x15585343] [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] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A common assumption regarding the residual organic matter, in bottom ash, is that it does not represent a significant pool of organic carbon and, beyond metal-ion complexation process, it is of little consequence to evolution of ash/leachate chemistry. This article evaluates the effect of residual organic matter and associated microbial respiratory processes on leaching of toxic metals (i.e. arsenic, copper, chromium, molybdenum, nickel, lead, antimony and zinc), eco-toxicity of ash leachates. Microbial respiration was quantified with help of a respirometric test equipment OXITOP control system. The effect of microbial respiration on metal/residual organic matter leaching and eco-toxicity was quantified with the help of batch leaching tests and an eco-toxicity assay - Daphnia magna. In general, the microbial respiration process decreased the leachate pH and eco-toxicity, indicating modification of bioavailability of metal species. Furthermore, the leaching of critical metals, such as copper and chromium, decreased after the respiration in both ash types (fresh and weathered). It was concluded that microbial respiration, if harnessed properly, could enhance the stability of fresh bottom ash and may promote its reuse.
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Affiliation(s)
- A Ilyas
- Department of Hydraulic and Environmental Engineering, Norwegian University of Science and Technology, Trondheim, Norway
| | - K M Persson
- Division of Water Resources Engineering, Lund University, Lund, Sweden
| | - M Persson
- Division of Water Resources Engineering, Lund University, Lund, Sweden
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18
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Ilyas A, Lavrik NV, Kim HK, Aswath PB, Varanasi VG. Enhanced interfacial adhesion and osteogenesis for rapid "bone-like" biomineralization by PECVD-based silicon oxynitride overlays. ACS Appl Mater Interfaces 2015; 7:15368-15379. [PMID: 26095187 PMCID: PMC6508966 DOI: 10.1021/acsami.5b03319] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Structurally unstable fracture sites require metal fixative devices, which have long healing times due to their lack of osteoinductivity. Bioactive glass coatings lack in interfacial bonding, delaminate, and have reduced bioactivity due to the high temperatures used for their fabrication. Here, we test the hypothesis that low-temperature PECVD amorphous silica can enhance adhesion to the underlying metal surface and that N incorporation enhances osteogenesis and rapid biomineralization. A model Ti/TiO2-SiOx interface was formed by first depositing Ti onto Si wafers, followed by surface patterning, thermal annealing to form TiO2, and depositing SiOx/Si(ON)x overlays. TEM micrographs showed conformal SiOx layers on Ti/TiO2 overlays while XPS data revealed the formation of an elemental Ti-O-Si interface. Nanoscratch testing verified strong SiOx bonding with the underlying TiO2 layers. In vitro studies showed that the surface properties changed significantly to reveal the formation of hydroxycarbonate apatite within 6 h, and Si(ON)x surface chemistry induced osteogenic gene expression of human periosteal cells and led to a rapid "bone-like" biomineral formation within 4 weeks. XANES data revealed that the incorporation of N increased the surface HA bioactivity by increasing the carbonate to phosphate ratio. In conclusion, silicon oxynitride overlays on bone-implant systems enhance osteogenesis and biomineralization via surface nitrogen incorporation.
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Affiliation(s)
- Azhar Ilyas
- Department of Biomedical Sciences, Baylor College of Dentistry Texas A&M University, 3302 Gaston Avenue, Dallas, Texas 75246, United States
| | - Nickolay V. Lavrik
- Center for Nanophase Materials Science, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Harry K.W. Kim
- Department of Orthopaedic Surgery, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390, United States
- Center for Excellence in Hip Disorders, Texas Scottish Rite Hospital, 2222 Welborn Street, Dallas, Texas 75219, United States
| | - Pranesh B. Aswath
- Department of Materials Science and Engineering, University of Texas at Arlington, 501 West First Street, Arlington, Texas 76019, United States
| | - Venu G. Varanasi
- Department of Biomedical Sciences, Baylor College of Dentistry Texas A&M University, 3302 Gaston Avenue, Dallas, Texas 75246, United States
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Ilyas A, Lovat E, Persson KM. Effects of substrate induced respiration on the stability of bottom ash in landfill cover environment. Waste Manag Res 2014; 32:1241-1246. [PMID: 25395160 DOI: 10.1177/0734242x14555804] [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] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The municipal solid waste incineration bottom ash is being increasingly used to construct landfill covers in Sweden. In post-closure, owing to increased cover infiltration, the percolating water can add external organic matter to bottom ash. The addition and subsequent degradation of this external organic matter can affect metal mobility through complexation and change in redox conditions. However, the impacts of such external organic matter addition on bottom ash stability have not been fully evaluated yet. Therefore, the objective of this study was to evaluate the impact of external organic matter on bottom ash respiration and metal leaching. The samples of weathered bottom ash were mixed with oven dried and digested wastewater sludge (1%-5% by weight). The aerobic respiration activity (AT4), as well as the leaching of metals, was tested with the help of respiration and batch leaching tests. The respiration and heavy metal leaching increased linearly with the external organic matter addition. Based on the results, it was concluded that the external organic matter addition would negatively affect the quality of landfill cover drainage.
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Affiliation(s)
- A Ilyas
- Department of Hydraulic Environmental Engineering, Norwegian University of Science and Technology, Trondheim, Norway Formerly, Division of Water Resources Engineering, Lund University, Lund, Sweden
| | - E Lovat
- IMAGE, Padova Università, Padova, Italy
| | - K M Persson
- Formerly, Division of Water Resources Engineering, Lund University, Lund, Sweden
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Ilyas A, Asghar W, Kim YT, Iqbal SM. Parallel recognition of cancer cells using an addressable array of solid-state micropores. Biosens Bioelectron 2014; 62:343-9. [DOI: 10.1016/j.bios.2014.06.048] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Revised: 06/20/2014] [Accepted: 06/24/2014] [Indexed: 10/25/2022]
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21
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Abstract
Cell adhesion, morphology and growth are influenced by surface topography at nano and micrometer scales. Nano-textured surfaces are prepared using photolithography, plasma etching and long polymer chemical etching which are cost prohibitive and require specialized equipment. This article demonstrates a simple approach to synthesize nano-textured scaffolds from chicken eggshells. Varieties of pattern are made on the eggshells like micro-needle forests and nanopores, giving very uniform nano-textures to the surfaces. The surfaces are characterized for chemical composition and crystal phase. The novel patterns are transferred to PDMS surfaces and the nano-textured PDMS surfaces are used to study the effect of texturing on human fibroblast cell growth and attachment. The effects of surface topographies, along with laminin coating on cell cultures, are also studied. We find an exciting phenomenon that the initial seeding density of the fibroblast cells affects the influence of the nano-texturing on cell growth. These nano-textured surfaces give 16 times more fibroblast growth when compared to flat PDMS surfaces. The novel nano-textured patterns also double the laminin adsorption on PDMS.
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Affiliation(s)
- Waseem Asghar
- Nano-Bio Laboratory, University of Texas at Arlington, Arlington, TX 76019, USA
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22
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Ilyas A, Asghar W, Allen PB, Duhon H, Ellington AD, Iqbal SM. Electrical detection of cancer biomarker using aptamers with nanogap break-junctions. Nanotechnology 2012; 23:275502. [PMID: 22706642 PMCID: PMC3404891 DOI: 10.1088/0957-4484/23/27/275502] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Epidermal growth factor receptor (EGFR) is a cell surface protein overexpressed in cancerous cells. It is known to be the most common oncogene. EGFR concentration also increases in the serum of cancer patients. The detection of small changes in the concentration of EGFR can be critical for early diagnosis, resulting in better treatment and improved survival rate of cancer patients. This article reports an RNA aptamer based approach to selectively capture EGFR protein and an electrical scheme for its detection. Pairs of gold electrodes with nanometer separation were made through confluence of focused ion beam scratching and electromigration. The aptamer was hybridized to a single stranded DNA molecule, which in turn was immobilized on the SiO(2) surface between the gold nanoelectrodes. The selectivity of the aptamer was demonstrated by using control chips with mutated non-selective aptamer and with no aptamer. Surface functionalization was characterized by optical detection and two orders of magnitude increase in direct current (DC) was measured when selective capture of EGFR occurred. This represents an electronic biosensor for the detection of proteins of interest for medical applications.
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Affiliation(s)
- Azhar Ilyas
- Department of Electrical Engineering, University of Texas at Arlington, Arlington, Texas 76011, USA
- Nanotechnology Research and Teaching Facility, University of Texas at Arlington, Arlington, Texas 76019, USA
- Nano-Bio Lab, University of Texas at Arlington, Arlington, Texas 76019, USA
| | - Waseem Asghar
- Department of Electrical Engineering, University of Texas at Arlington, Arlington, Texas 76011, USA
- Nanotechnology Research and Teaching Facility, University of Texas at Arlington, Arlington, Texas 76019, USA
- Nano-Bio Lab, University of Texas at Arlington, Arlington, Texas 76019, USA
| | - Peter B. Allen
- Institute for Cell and Molecular Biology, University of Texas at Austin, Austin, TX 78712, USA
| | - Holli Duhon
- Institute for Cell and Molecular Biology, University of Texas at Austin, Austin, TX 78712, USA
| | - Andrew D. Ellington
- Institute for Cell and Molecular Biology, University of Texas at Austin, Austin, TX 78712, USA
| | - Samir M. Iqbal
- Department of Electrical Engineering, University of Texas at Arlington, Arlington, Texas 76011, USA
- Nanotechnology Research and Teaching Facility, University of Texas at Arlington, Arlington, Texas 76019, USA
- Nano-Bio Lab, University of Texas at Arlington, Arlington, Texas 76019, USA
- Joint Graduate Committee of Bioengineering Program, University of Texas at Arlington and University of Texas Southwestern Medical Center at Dallas, Arlington, Texas 76010, USA
- Department of Bioengineering, University of Texas at Arlington and University of Texas Southwestern Medical Center at Dallas, Arlington, Texas 76010, USA
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Asghar W, Wan Y, Ilyas A, Bachoo R, Kim YT, Iqbal SM. Electrical fingerprinting, 3D profiling and detection of tumor cells with solid-state micropores. Lab Chip 2012; 12:2345-52. [PMID: 22549275 DOI: 10.1039/c2lc21012f] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Solid-state micropores can provide direct information of ex vivo or in vitro cell populations. Micropores are used to detect and discriminate cancer cells based on the translocation behavior through micropores. The approach provides rapid detection of cell types based on their size and mechano-physical properties like elasticity, viscosity and stiffness. Use of a single micropore device enables detection of tumor cells from whole blood efficiently, at 70% CTC detection efficiency. The CTCs show characteristic electrical signals which easily distinguish these from other cell types. The approach provides a gentle and inexpensive instrument that can be used for specific blood analysis in a lab-on-a-chip setting. The device does not require any preprocessing of the blood sample, particles/beads attachment, surface functionalization or fluorescent tags and provides quantitative and objective detection of cancer cells.
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Affiliation(s)
- Waseem Asghar
- Department of Electrical Engineering, University of Texas at Arlington, Arlington, TX 76011, USA
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Asghar W, Ilyas A, Deshmukh RR, Sumitsawan S, Timmons RB, Iqbal SM. Pulsed plasma polymerization for controlling shrinkage and surface composition of nanopores. Nanotechnology 2011; 22:285304. [PMID: 21636880 DOI: 10.1088/0957-4484/22/28/285304] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Solid-state nanopores have emerged as sensors for single molecules and these have been employed to examine the biophysical properties of an increasingly large variety of biomolecules. Herein we describe a novel and facile approach to precisely adjust the pore size, while simultaneously controlling the surface chemical composition of the solid-state nanopores. Specifically, nanopores fabricated using standard ion beam technology are shrunk to the requisite molecular dimensions via the deposition of highly conformal pulsed plasma generated thin polymeric films. The plasma treatment process provides accurate control of the pore size as the conformal film deposition depends linearly on the deposition time. Simultaneously, the pore and channel chemical compositions are controlled by appropriate selection of the gaseous monomer and plasma conditions employed in the deposition of the polymer films. The controlled pore shrinkage is characterized with high resolution AFM, and the film chemistry of the plasma generated polymers is analyzed with FTIR and XPS. The stability and practical utility of this new approach is demonstrated by successful single molecule sensing of double-stranded DNA. The process offers a viable new advance in the fabrication of tailored nanopores, in terms of both the pore size and surface composition, for usage in a wide range of emerging applications.
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Affiliation(s)
- Waseem Asghar
- Department of Electrical Engineering, University of Texas at Arlington, TX 76011, USA
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Asghar W, Ilyas A, Billo JA, Iqbal SM. Shrinking of Solid-state Nanopores by Direct Thermal Heating. Nanoscale Res Lett 2011; 6:372. [PMID: 21711885 PMCID: PMC3211463 DOI: 10.1186/1556-276x-6-372] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2011] [Accepted: 05/04/2011] [Indexed: 05/28/2023]
Abstract
Solid-state nanopores have emerged as useful single-molecule sensors for DNA and proteins. A novel and simple technique for solid-state nanopore fabrication is reported here. The process involves direct thermal heating of 100 to 300 nm nanopores, made by focused ion beam (FIB) milling in free-standing membranes. Direct heating results in shrinking of the silicon dioxide nanopores. The free-standing silicon dioxide membrane is softened and adatoms diffuse to a lower surface free energy. The model predicts the dynamics of the shrinking process as validated by experiments. The method described herein, can process many samples at one time. The inbuilt stress in the oxide film is also reduced due to annealing. The surface composition of the pore walls remains the same during the shrinking process. The linear shrinkage rate gives a reproducible way to control the diameter of a pore with nanometer precision.
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Affiliation(s)
- Waseem Asghar
- Department of Electrical Engineering, University of Texas at Arlington, Arlington, TX 76019, USA
- Nanotechnology Research and Teaching Facility, University of Texas at Arlington, Arlington, TX 76019, USA
| | - Azhar Ilyas
- Department of Electrical Engineering, University of Texas at Arlington, Arlington, TX 76019, USA
- Nanotechnology Research and Teaching Facility, University of Texas at Arlington, Arlington, TX 76019, USA
| | - Joseph Anthony Billo
- Department of Electrical Engineering, University of Texas at Arlington, Arlington, TX 76019, USA
- Nanotechnology Research and Teaching Facility, University of Texas at Arlington, Arlington, TX 76019, USA
| | - Samir Muzaffar Iqbal
- Department of Electrical Engineering, University of Texas at Arlington, Arlington, TX 76019, USA
- Nanotechnology Research and Teaching Facility, University of Texas at Arlington, Arlington, TX 76019, USA
- Joint Graduate Committee of Bioengineering Program, University of Texas at Arlington and University of Texas Southwestern Medical Center at Dallas, University of Texas at Arlington, Arlington, TX 76019, USA
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Illa I, Leon-Monzon M, Agboatwalla M, Ilyas A, Latov N, Dalakas MC. Antiganglioside antibodies in patients with acute polio and post-polio syndrome. Ann N Y Acad Sci 1995; 753:374-7. [PMID: 7611648 DOI: 10.1111/j.1749-6632.1995.tb27565.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- I Illa
- Neuromuscular Diseases Section, NINDS, NIH, Bethesda, Maryland 20892-1382, USA
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Ilyas A, Hirabayasi M, Matsui T, Yano H, Yano F, Kikishima T, Takebe M, Hayakawa K. A note on the removal of phytate in soybean meal using Aspergillus usami. Asian Australas J Anim Sci 1995. [DOI: 10.5713/ajas.1995.135] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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28
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Hwang S, Torii S, Ilyas A, Matsui T, Yano H. Comparative changes of fat digestibility and fat accumulation by the carbon chain length of dietary glycerol tri-homogenous fatty acids in rats. Nutr Res 1994. [DOI: 10.1016/s0271-5317(05)80718-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Noronha AB, Ilyas A, Antonicek H, Schachner M, Quarles RH. Molecular specificity of L2 monoclonal antibodies that bind to carbohydrate determinants of neural cell adhesion molecules and their resemblance to other monoclonal antibodies recognizing the myelin-associated glycoprotein. Brain Res 1986; 385:237-44. [PMID: 2430667 DOI: 10.1016/0006-8993(86)91069-3] [Citation(s) in RCA: 71] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
L2 monoclonal antibodies and HNK-1 have been shown to bind to related carbohydrate determinants in the myelin-associated glycoprotein (MAG) and several adhesion molecules of the nervous system including neural cell adhesion molecule (N-CAM), L1 and J1. It is shown here that MAG is the principal component in human white matter binding the L2 antibodies, but the most prominent antigens with the L2 epitopes in human gray matter are of higher Mr. It is also shown that the L2 antibodies resemble HNK-1 in binding to some 19-28 kDa glycoproteins and some sulfated, glucuronic acid-containing sphingoglycolipids of the peripheral nervous system (PNS). In addition, monoclonal and polyclonal antibodies raised to human MAG are shown to cross react with bovine N-CAM due to the presence of common carbohydrate constituents. The results further emphasize the shared antigenicity between MAG, N-CAM and other adhesion molecules. In addition, they demonstrate that the L2 antibodies belong to a family of monoclonal antibodies (including HNK-1, human IgM paraproteins associated with neuropathy, and others) that are characterized by reactivity against carbohydrate determinants shared by human MAG, the 19-28 kDa glycoproteins of the PNS and the sulfated, glucuronic acid-containing sphingoglycolipids of the PNS.
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