1
|
Kukat C, Neumann E, Fava E, Fried H. A novel room concept for shared resource laboratories. Cytometry A 2024; 105:16-23. [PMID: 37772729 DOI: 10.1002/cyto.a.24795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 08/08/2023] [Accepted: 09/12/2023] [Indexed: 09/30/2023]
Abstract
Shared resource laboratories/core facilities (SRLs) are centralized platforms that house and provide access to complex and expensive research equipment. Due to the highly complex nature of the instrumentation they support, SRLs have special environmental requirements for their laboratory space. Here, we describe the planning and establishment of a large light microscopy SRL, with a special focus on room layout, custom-designed air conditioning and vibration, which can also be adapted to proteomics, genomics, and flow or mass cytometry SRLs.
Collapse
Affiliation(s)
- Christian Kukat
- FACS & Imaging Core Facility, Max Planck Institute for Biology of Ageing, Cologne, Germany
| | - Eckhard Neumann
- Department for Technical Infrastructure, German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany
| | - Eugenio Fava
- Core Research Facilities and Services, German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany
| | - Hans Fried
- Core Research Facilities and Services, Light Microscope Facility, German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany
| |
Collapse
|
2
|
Bhatt M, Vazirani A, Srivastava S, Chaudhary S. A Blueprint For a Cost-Efficient IoT Enable Biotech Lab. Ind Biotechnol (New Rochelle N Y) 2022. [DOI: 10.1089/ind.2021.0025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Mehul Bhatt
- Department of Electronics Engineering, Veermata Jijabai Technological Institute, Mumbai, India
| | - Aman Vazirani
- Department of Biotechnology, School of Engineering and Applied Sciences, Bennett University, Greater Noida, India
| | - Sumant Srivastava
- Department of Biotechnology, School of Engineering and Applied Sciences, Bennett University, Greater Noida, India
| | - Sarika Chaudhary
- Department of Biotechnology, School of Engineering and Applied Sciences, Bennett University, Greater Noida, India
| |
Collapse
|
3
|
Totoiu CA, Phillips JM, Reese AT, Majumdar S, Girguis PR, Raston CL, Weiss GA. Vortex fluidics-mediated DNA rescue from formalin-fixed museum specimens. PLoS One 2020; 15:e0225807. [PMID: 31999723 PMCID: PMC6992170 DOI: 10.1371/journal.pone.0225807] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2019] [Accepted: 01/06/2020] [Indexed: 12/25/2022] Open
Abstract
DNA from formalin-preserved tissue could unlock a vast repository of genetic information stored in museums worldwide. However, formaldehyde crosslinks proteins and DNA, and prevents ready amplification and DNA sequencing. Formaldehyde acylation also fragments the DNA. Treatment with proteinase K proteolyzes crosslinked proteins to rescue the DNA, though the process is quite slow. To reduce processing time and improve rescue efficiency, we applied the mechanical energy of a vortex fluidic device (VFD) to drive the catalytic activity of proteinase K and recover DNA from American lobster tissue (Homarus americanus) fixed in 3.7% formalin for >1-year. A scan of VFD rotational speeds identified the optimal rotational speed for recovery of PCR-amplifiable DNA and while 500+ base pairs were sequenced, shorter read lengths were more consistently obtained. This VFD-based method also effectively recovered DNA from formalin-preserved samples. The results provide a roadmap for exploring DNA from millions of historical and even extinct species.
Collapse
Affiliation(s)
- Christian A. Totoiu
- Department of Chemistry, University of California, Irvine, California, United States of America
| | - Jessica M. Phillips
- Flinders Institute for Nanoscale Science and Technology, College of Science and Engineering, Flinders University, Adelaide, South Australia, Australia
| | - Aspen T. Reese
- Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, Massachusetts, United States of America
| | - Sudipta Majumdar
- Department of Chemistry, University of California, Irvine, California, United States of America
| | - Peter R. Girguis
- Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, Massachusetts, United States of America
| | - Colin L. Raston
- Flinders Institute for Nanoscale Science and Technology, College of Science and Engineering, Flinders University, Adelaide, South Australia, Australia
| | - Gregory A. Weiss
- Department of Chemistry, University of California, Irvine, California, United States of America
- Department of Molecular Biology and Biochemistry, University of California, Irvine, California, United States of America
- Department of Pharmaceutical Sciences, University of California, Irvine, California, United States of America
| |
Collapse
|
4
|
Numerical Investigation of Design and Operating Parameters of Thermal Gradient Continuous-Flow PCR Microreactor Using One Heater. Processes (Basel) 2019. [DOI: 10.3390/pr7120919] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
To respond to the dire need for miniaturization and process simplification of continuous-flow PCR (CF-PCR) device, this paper represents design and operation guide of a novel metal alloy assisted hybrid microdevice (polydimethylsiloxane (PDMS) and glass) for CF-PCR employing one heater. In this research, the specific objectives are to determine whether one heater chip design will be flexible enough when the size of DNA base pair is varied and to investigate whether one heater CF-PCR device will be able to resolve the longstanding problem of thermal crosstalk. Furthermore, the parametric study is performed to determine which of the fourteen parameters have the greatest impact on the performance of one heater CF-PCR device. The main objective of this parametric study is to distinguish between the parameters that are either critical to the chip performance or can be freely specified. It is found that substrate thickness, flow rate, channel spacing, aspect ratio, channel pass length and external heat transfer coefficient are the most limiting parameters that can either improve or deteriorate the chip’s thermal performance. Overall, the impact of design and operating parameters are observed to be least on thermocycling profile at low Reynolds number (≤0.37 Re). However, in addition to the primary metric advantages of CF-PCR, one heater chip design helps in minimizing the thermal crosstalk effects by a factor of 4 in comparison to dual heater PCR while still maintaining a critical criteria of chip flexibility in terms of handling various sizes of DNA fragments. Hence, the proposed scheme paves the way for low-cost point-of-care diagnostics, system integration, and device miniaturization, realizing a portable microfluidic device applicable for on-site and direct field uses.
Collapse
|
5
|
The effect of different temperature conditions on human embryosin vitro: two sibling studies. Reprod Biomed Online 2019; 38:508-515. [PMID: 30782420 DOI: 10.1016/j.rbmo.2018.11.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 09/08/2018] [Accepted: 11/29/2018] [Indexed: 11/23/2022]
Abstract
RESEARCH QUESTION What temperature is optimal for human embryo development up to day 5 or 6? DESIGN Two prospective sibling oocyte studies on culture temperature were conducted in a university-based tertiary referral centre. Eligibility critera for both studies: Study 1: 50 cycles between August and October 2015, with culture at a stable temperature (37.0°C ± 0.3°C) or culture using a circadian temperature rhythm (CTR) (1 am to 6 am: 36.6°C, gradual increase to 37.5°C; 11 am to 9 pm: 37.5°C; gradual decrease to 36.6°C); study 2: 99 cycles between April and November 2016, with stable culture at 36.6°C or 37.1°C. PRIMARY OUTCOME MEASURES fertilization and embryo development (top and good quality) up to day 5 or 6, and utilization rate (number of embryos transferred and cryopreserved per zygote). Secondary outcome measure: clinical pregnancy (number of pregnancies with at least one gestational sac). RESULTS An incubator with CTR was used for culture. An effect was found on embryo development (utilization rate: 42.1% versus 32.6%; P = 0.014), but not on clinical pregnancy rate (60.0% versus 45.5%; P = 0.670). Stable culture at 36.6°C or 37.1°C did not affect embryo development (utilization rate: 40.0% versus 40.4%; P = 0.905); clinical pregnancy rate was improved by culture at 37.1°C (46.4% versus 74.2%; P = 0.036). CONCLUSION Culture in an incubator with CTR does not improve fertilization rate or embryo quality. Embryo culture at 36.6°C or 37.1°C showed similar embryo development.
Collapse
|
6
|
Pollet-Villard X, Levy R. [Impact of air quality on practices and results in the IVF laboratory]. ACTA ACUST UNITED AC 2018; 46:713-728. [PMID: 30340957 DOI: 10.1016/j.gofs.2018.09.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Indexed: 12/19/2022]
Abstract
The concept of Air Quality often refers to particulate and microbiological contamination of ambiant air. European Directive 2006/86/CE encompass the IVF process and specify a class A air quality for manipulation of tissue and cells, in a class D environment (A over D rule). Recognizing the paramount importance of ensuring the highest microbiological and particulate safety in the IVF laboratory, it is equally important to take into account practicability issues and the financial burden of these recommendations, as well as the utter need to protect gametes and embryo viability during their IVF journey. The usefulness of such stringent recommendations may also be questionned given the absence of published cases of airborne contaminations and related patients infections after embryo transfer. The European directive stems from pharmaceutical standards and were not specifically designed for human IVF. Gametes and embryos are indeed extremely sensitive to physical and chemical stress and require strict temperature, osmolarity and pH control, as well as an absence of chemical contamination during manipulation and culture. These conditions are hardly obtained when using laminar flow hoods. Following concerns raised by many experts in the field, exceptions to the A over D rule were added in the 2006/86/CE Directives. This narrative review discusses all these aspects in a critical way and compare scientific and legal requirements applying to IVF practices in different regions of the world.
Collapse
Affiliation(s)
- X Pollet-Villard
- Nataliance, laboratoire Medibio, laboratoire BPR-as, LaboFrance, 755, avenue Jacqueline-Auriol, 45770 Saran, France.
| | - R Levy
- Service de médecine de la reproduction-Cecos, hôpital Tenon, HUEP, AP-HP, 4, rue de la Chine, 75020 Paris, France; UMRS 938, Sorbonne universités, université Pierre-et-Marie-Curie (UPMC), université Paris 06, 75012 Paris France
| |
Collapse
|
7
|
Golbach LA, Portelli LA, Savelkoul HFJ, Terwel SR, Kuster N, de Vries RBM, Verburg-van Kemenade BML. Calcium homeostasis and low-frequency magnetic and electric field exposure: A systematic review and meta-analysis of in vitro studies. ENVIRONMENT INTERNATIONAL 2016; 92-93:695-706. [PMID: 26872872 DOI: 10.1016/j.envint.2016.01.014] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Revised: 12/10/2015] [Accepted: 01/18/2016] [Indexed: 05/24/2023]
Abstract
Low frequency magnetic field (LF MF) exposure is recurrently suggested to have the ability to induce health effects in society. Therefore, in vitro model systems are used to investigate biological effects of exposure. LF MF induced changes of the cellular calcium homeostasis are frequently hypothesised to be the possible target, but this hypothesis is both substantiated and rejected by numerous studies in literature. Despite the large amount of data, no systematic analysis of in vitro studies has been conducted to address the strength of evidence for an association between LF MF exposure and calcium homeostasis. Our systematic review, with inclusion of 42 studies, showed evidence for an association of LF MF with internal calcium concentrations and calcium oscillation patterns. The oscillation frequency increased, while the amplitude and the percentage of oscillating cells remained constant. The intracellular calcium concentration increased (SMD 0.351, 95% CI 0.126, 0.576). Subgroup analysis revealed heterogeneous effects associated with the exposure frequency, magnetic flux density and duration. Moreover, we found support for the presence of MF-sensitive cell types. Nevertheless, some of the included studies may introduce a great risk of bias as a result of uncontrolled or not reported exposure conditions, temperature ranges and ambient fields. In addition, mathematical calculations of the parasitic induced electric fields (IEFs) disclosed their association with increased intracellular calcium. Our results demonstrate that LF MF might influence the calcium homeostasis in cells in vitro, but the risk of bias and high heterogeneity (I(2)>75%) weakens the analyses. Therefore any potential clinical implications await further investigation.
Collapse
Affiliation(s)
- Lieke A Golbach
- Cell Biology and Immunology Group, Wageningen University, P.O.Box 338, 6700AH Wageningen, The Netherlands
| | - Lucas A Portelli
- The Foundation for Research on Information Technologies in Society (IT'IS), Zeughausstrasse 43, CH-8004 Zurich, Switzerland
| | - Huub F J Savelkoul
- Cell Biology and Immunology Group, Wageningen University, P.O.Box 338, 6700AH Wageningen, The Netherlands
| | - Sofie R Terwel
- Cell Biology and Immunology Group, Wageningen University, P.O.Box 338, 6700AH Wageningen, The Netherlands
| | - Niels Kuster
- The Foundation for Research on Information Technologies in Society (IT'IS), Zeughausstrasse 43, CH-8004 Zurich, Switzerland; Department of Information Technology and Electrical Engineering, Swiss Federal Technical Institute (ETHZ), Gloriastrasse 35, CH-8092 Zurich, Switzerland
| | - Rob B M de Vries
- SYRCLE, Central Animal Laboratory, Radboud University Medical Center, The Netherlands
| | | |
Collapse
|
8
|
Walker MW, Butler JM, Higdon HL, Boone WR. Temperature variations within and between incubators-a prospective, observational study. J Assist Reprod Genet 2013; 30:1583-5. [PMID: 24146163 DOI: 10.1007/s10815-013-0104-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Accepted: 09/22/2013] [Indexed: 10/26/2022] Open
Abstract
PURPOSE To determine if there is a temperature variation within and between incubators. METHODS This prospective, experimental trial with external controls was performed at an Assisted Reproductive Technology laboratory in a tertiary-care, university hospital. Temperature values were taken at various locations within and between incubators. RESULTS Even though they were both set to 37.0 °C, the same make and model incubators had significantly different internal temperatures. Temperatures differed significantly among top, middle and bottom shelves and between fronts and backs of shelves. CONCLUSION(S) We found temperatures differed within and between our front-loading incubators. Thus, laboratory personnel should evaluate their incubators for temperature variations within and between incubators and, if temperatures differ significantly, develop a plan to deal with discrepancies.
Collapse
Affiliation(s)
- Meredith W Walker
- Greenville Health System, Medical Experience Academy, Greenville, SC, USA
| | | | | | | |
Collapse
|