1
|
Fishbein I, Welch T, Guerrero DT, Alferiev IS, Adamo RF, Chorny M, Gupte RK, Tang Y, Levy RJ. Paraffin processing of stented arteries using a postfixation dissolution of metallic and polymeric stents. Cardiovasc Pathol 2016; 25:483-488. [PMID: 27616613 DOI: 10.1016/j.carpath.2016.08.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 08/15/2016] [Accepted: 08/16/2016] [Indexed: 12/20/2022] Open
Abstract
Studying the morphology of the arterial response to endovascular stent implantation requires embedding the explanted stented artery in rigid materials such as poly(methyl methacrylate) to enable sectioning through both the in situ stent and the arterial wall, thus maintaining the proper anatomic relationships. This is a laborious, time-consuming process. Moreover, the technical quality of stained plastic sections is typically suboptimal and, in some cases, precludes immunohistochemical analysis. Here we describe a novel technique for dissolution of metallic and plastic stents that is compatible with subsequent embedding of "destented" arteries in paraffin, fine sectioning, major staining protocols, and immunohistochemistry.
Collapse
Affiliation(s)
- Ilia Fishbein
- The Children's Hospital of Philadelphia, Philadelphia, PA, USA; Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
| | - Tre Welch
- Department of Cardio-Thoracic Surgery, University of Texas, Dallas, Richardson, TX, USA
| | | | - Ivan S Alferiev
- The Children's Hospital of Philadelphia, Philadelphia, PA, USA; Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Richard F Adamo
- The Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Michael Chorny
- The Children's Hospital of Philadelphia, Philadelphia, PA, USA; Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Rohit K Gupte
- The Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Yanqing Tang
- The Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Robert J Levy
- The Children's Hospital of Philadelphia, Philadelphia, PA, USA; Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| |
Collapse
|
2
|
Sasso LA, Johnston IH, Zheng M, Gupte RK, Ündar A, Zahn JD. Automated microfluidic processing platform for multiplexed magnetic bead immunoassays. Microfluid Nanofluidics 2012; 13:603-612. [PMID: 26366143 PMCID: PMC4564126 DOI: 10.1007/s10404-012-0980-0] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
A microfluidic platform is presented which fully automates all incubation steps of a three-stage, multiplexed magnetic bead immunoassay, such as the Luminex® xMAP technology. Magnetic actuation is used to transfer the microbeads between co-infused adjacent laminar flow streams to transport the beads into and out of incubation and wash solutions, with extended incubation channels to allow sufficient bead incubation times (1-30 min, commonly 5 min per stage) to enable high-sensitivity. The serial incubation steps of the immunoassay are completed in succession within the device with no operator interaction, and the continuous flow operation with magnetic bead transfer defines the incubation sequencing requiring no external fluidic controls beyond syringe pump infusion. The binding kinetics of the assay is empirically characterized to determine the required incubation times for specific assay sensitivities in the range 1 pg/ml to 100 ng/ml. By using a Luminex® xMAP duplex assay, concurrent detection of IL-6 and TNF-α was demonstrated on-chip with a detection range 10 pg/ml to 1 ng/ml. This technology enables rapid automation of magnetic microbead assays, and has the potential to perform continuous concentration monitoring.
Collapse
Affiliation(s)
- Lawrence A. Sasso
- BioMEMS Laboratory, Department of Biomedical Engineering, Rutgers, The State University of New Jersey, 599 Taylor Road, Piscataway, NJ 08854, USA
| | - Ian H. Johnston
- BioMEMS Laboratory, Department of Biomedical Engineering, Rutgers, The State University of New Jersey, 599 Taylor Road, Piscataway, NJ 08854, USA
| | - Mingde Zheng
- BioMEMS Laboratory, Department of Biomedical Engineering, Rutgers, The State University of New Jersey, 599 Taylor Road, Piscataway, NJ 08854, USA
| | - Rohit K. Gupte
- BioMEMS Laboratory, Department of Biomedical Engineering, Rutgers, The State University of New Jersey, 599 Taylor Road, Piscataway, NJ 08854, USA
| | - Akif Ündar
- Penn State Hershey Pediatric Cardiovascular Research Center, Department of Pediatrics, Surgery, and Bioengineering, Penn State Milton S. Hershey Medical Center, Penn State College of Medicine, Penn State Children’s Hospital, Hershey, PA, 17033-0850, USA
| | - Jeffrey D. Zahn
- Department of Biomedical Engineering, Rutgers, The State University of New Jersey, Room 311, 599 Taylor Road, Piscataway, NJ 08854, USA
| |
Collapse
|
3
|
Kooner KS, Cooksey JC, Barron JB, Zimmerman TJ, Gupte RK, Wall JL. Tonometry comparison: Goldmann versus Tono-Pen. Ann Ophthalmol 1992; 24:29-36. [PMID: 1543324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Tono-Pen and Goldmann tonometers were compared in 152 eyes of healthy subjects (Group A) and 69 eyes of patients after intraocular procedures (Group B). In Group A, the readings from both the tonometers showed no statistically significant difference in the 0 to 15mmHg range. However, the Tono-Pen values were lower in eyes with intraocular pressures between 16 and 30mmHg (P less than .0001). This questions the reliability of Tono-Pen as an adequate screening instrument. The correlation between the two instruments was acceptable in Group B (r = .89), indicating that the Tono-Pen may be used cautiously to determine intraocular pressure in postoperative patients.
Collapse
Affiliation(s)
- K S Kooner
- Department of Ophthalmology, Louisiana State Medical Center, Shreveport
| | | | | | | | | | | |
Collapse
|