1
|
Miller D, Doering J. Process of Maintaining Self in Individuals Living With Systemic Sclerosis: A Grounded Theory Study of American Women. West J Nurs Res 2024; 46:26-35. [PMID: 37982345 DOI: 10.1177/01939459231214600] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2023]
Abstract
BACKGROUND People with chronic illnesses may struggle to adapt psychologically to the illness experience and have feelings of identity loss, self-diminishment, and biographical disruption. This may limit people's ability to engage in optimal self-management. Systemic sclerosis is a debilitating, stigmatizing, and life-limiting progressive chronic illness with significant disfiguring effects. Little is known about the identity management process in people with disfiguring and debilitating conditions such as systemic sclerosis. PURPOSE The purpose of this study was to generate a grounded theory explicating the process of maintaining a sense of self in people living with systemic sclerosis. METHODS Fifteen women with systemic sclerosis were recruited to ensure representation of a range of illness duration and progression. Semi-structured interviews were conducted, transcribed, and analyzed using open, selective, and theoretical coding. RESULTS A basic social process of "maintaining self" was generated from the data that explained the women's experience of living with systemic sclerosis and how they tried to hold on to their identity. Three core categories were identified. Adapting to changes are the behaviors that participants struggled through to carry on with their everyday lives. Dismantling of self was a distressing internal process where participants lost their sense of self and purpose. Restoring self was a transformative process that allowed participants to rewrite and rebuild their biographies. CONCLUSIONS Findings suggest that the management of identity was important for understanding how people adapt to life with systemic sclerosis. This study can help nurses better understand how to support patients holistically with the management of systemic sclerosis.
Collapse
|
2
|
Doering J, Sinicki R. Rise and Fall of the Baby Box in the United States. J Obstet Gynecol Neonatal Nurs 2024; 53:3-6. [PMID: 37984491 DOI: 10.1016/j.jogn.2023.10.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2023] Open
|
3
|
Kumru OS, Bajoria S, Kaur K, Hickey JM, Van Slyke G, Doering J, Berman K, Richardson C, Lien H, Kleanthous H, Mantis NJ, Joshi SB, Volkin DB. Effects of aluminum-salt, CpG and emulsion adjuvants on the stability and immunogenicity of a virus-like particle displaying the SARS-CoV-2 receptor-binding domain (RBD). Hum Vaccin Immunother 2023; 19:2264594. [PMID: 37932241 PMCID: PMC10760504 DOI: 10.1080/21645515.2023.2264594] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Accepted: 09/25/2023] [Indexed: 11/08/2023] Open
Abstract
Second-generation COVID-19 vaccines with improved immunogenicity (e.g., breadth, duration) and availability (e.g., lower costs, refrigerator stable) are needed to enhance global coverage. In this work, we formulated a clinical-stage SARS-CoV-2 receptor-binding domain (RBD) virus-like particle (VLP) vaccine candidate (IVX-411) with widely available adjuvants. Specifically, we assessed the in vitro storage stability and in vivo mouse immunogenicity of IVX-411 formulated with aluminum-salt adjuvants (Alhydrogel™, AH and Adjuphos™, AP), without or with the TLR-9 agonist CpG-1018™ (CpG), and compared these profiles to IVX-411 adjuvanted with an oil-in-water nano-emulsion (AddaVax™, AV). Although IVX-411 bound both AH and AP, lower binding strength of antigen to AP was observed by Langmuir binding isotherms. Interestingly, AH- and AP-adsorbed IVX-411 had similar storage stability profiles as measured by antigen-binding assays (competitive ELISAs), but the latter displayed higher pseudovirus neutralizing titers (pNT) in mice, at levels comparable to titers elicited by AV-adjuvanted IVX-411. CpG addition to alum (AP or AH) resulted in a marginal trend of improved pNTs in stressed samples only, yet did not impact the storage stability profiles of IVX-411. In contrast, previous work with AH-formulations of a monomeric RBD antigen showed greatly improved immunogenicity and decreased stability upon CpG addition to alum. At elevated temperatures (25, 37°C), IVX-411 formulated with AH or AP displayed decreased in vitro stability compared to AV-formulated IVX-411and this rank-ordering correlated with in vivo performance (mouse pNT values). This case study highlights the importance of characterizing antigen-adjuvant interactions to develop low cost, aluminum-salt adjuvanted recombinant subunit vaccine candidates.
Collapse
Affiliation(s)
- Ozan S. Kumru
- Department of Pharmaceutical Chemistry, Vaccine Analytics and Formulation Center, University of Kansas, Lawrence, KS, USA
| | - Sakshi Bajoria
- Department of Pharmaceutical Chemistry, Vaccine Analytics and Formulation Center, University of Kansas, Lawrence, KS, USA
| | - Kawaljit Kaur
- Department of Pharmaceutical Chemistry, Vaccine Analytics and Formulation Center, University of Kansas, Lawrence, KS, USA
| | - John M. Hickey
- Department of Pharmaceutical Chemistry, Vaccine Analytics and Formulation Center, University of Kansas, Lawrence, KS, USA
| | - Greta Van Slyke
- Division of Infectious Disease, Wadsworth Center, New York State Department of Health, Albany, NY, USA
| | - Jennifer Doering
- Division of Infectious Disease, Wadsworth Center, New York State Department of Health, Albany, NY, USA
| | - Katherine Berman
- Division of Infectious Disease, Wadsworth Center, New York State Department of Health, Albany, NY, USA
| | | | | | - Harry Kleanthous
- Discovery & Translational Sciences, Global Health, Bill and Melinda Gates Foundation, Seattle, WA, USA
| | - Nicholas J. Mantis
- Division of Infectious Disease, Wadsworth Center, New York State Department of Health, Albany, NY, USA
| | - Sangeeta B. Joshi
- Department of Pharmaceutical Chemistry, Vaccine Analytics and Formulation Center, University of Kansas, Lawrence, KS, USA
| | - David B. Volkin
- Department of Pharmaceutical Chemistry, Vaccine Analytics and Formulation Center, University of Kansas, Lawrence, KS, USA
| |
Collapse
|
4
|
Bajoria S, Kumru OS, Doering J, Berman K, Slyke GV, Prigodich A, Rodriguez-Aponte SA, Kleanthous H, Love JC, Mantis NJ, Joshi SB, Volkin DB. Nanoalum Formulations Containing Aluminum Hydroxide and CpG 1018 TM Adjuvants: The Effect on Stability and Immunogenicity of a Recombinant SARS-CoV-2 RBD Antigen. Vaccines (Basel) 2023; 11:1030. [PMID: 37376419 DOI: 10.3390/vaccines11061030] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 05/16/2023] [Accepted: 05/18/2023] [Indexed: 06/29/2023] Open
Abstract
Aluminum-salt vaccine adjuvants (alum) are commercially available as micron-sized particles with varying chemical composition and crystallinity. There are reports of enhanced adjuvanticity when the alum's particle size is reduced to the nanometer range. Previously, we demonstrated that a recombinant receptor-binding domain (RBD)-based COVID-19 vaccine candidate (RBD-J; RBD-L452K-F490W) formulated with aluminum hydroxide (Alhydrogel®; AH) and CpG 1018™ (CpG) adjuvants induced potent neutralizing antibody responses in mice yet displayed instability during storage. In this work, we evaluated whether sonication of AH to the nanometer size range (nanoAH) could further enhance immunogenicity or improve storage stability of the above formulation. The addition of CpG to nanoAH (at mouse doses), however, caused re-agglomeration of nanoAH. AH-CpG interactions were evaluated by Langmuir binding isotherms and zeta potential measurements, and stabilized nanoAH + CpG formulations of RBD-J were then designed by (1) optimizing CpG:Aluminum dose ratios or (2) adding a small-molecule polyanion (phytic acid, PA). Compared with the micron-sized AH + CpG formulation, the two stabilized nanoAH + CpG formulations of RBD-J demonstrated no enhancement in SARS-CoV-2 pseudovirus neutralizing titers in mice, but the PA-containing nanoAH + CpG formulation showed improved RBD-J storage stability trends (at 4, 25, and 37 °C). The formulation protocols presented herein can be employed to evaluate the potential benefits of the nanoAH + CpG adjuvant combination with other vaccine antigens in different animal models.
Collapse
Affiliation(s)
- Sakshi Bajoria
- Department of Pharmaceutical Chemistry, Vaccine Analytics and Formulation Center, University of Kansas, Lawrence, KS 66047, USA
| | - Ozan S Kumru
- Department of Pharmaceutical Chemistry, Vaccine Analytics and Formulation Center, University of Kansas, Lawrence, KS 66047, USA
| | - Jennifer Doering
- Division of Infectious Diseases, Wadsworth Center, New York State Department of Health, Albany, NY 12208, USA
| | - Katherine Berman
- Division of Infectious Diseases, Wadsworth Center, New York State Department of Health, Albany, NY 12208, USA
| | - Greta Van Slyke
- Division of Infectious Diseases, Wadsworth Center, New York State Department of Health, Albany, NY 12208, USA
| | - Anneka Prigodich
- Division of Infectious Diseases, Wadsworth Center, New York State Department of Health, Albany, NY 12208, USA
| | - Sergio A Rodriguez-Aponte
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- The Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | | | - J Christopher Love
- The Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Nicholas J Mantis
- Division of Infectious Diseases, Wadsworth Center, New York State Department of Health, Albany, NY 12208, USA
| | - Sangeeta B Joshi
- Department of Pharmaceutical Chemistry, Vaccine Analytics and Formulation Center, University of Kansas, Lawrence, KS 66047, USA
| | - David B Volkin
- Department of Pharmaceutical Chemistry, Vaccine Analytics and Formulation Center, University of Kansas, Lawrence, KS 66047, USA
| |
Collapse
|
5
|
Bajoria S, Kaur K, Kumru OS, Van Slyke G, Doering J, Novak H, Rodriguez Aponte SA, Dalvie NC, Naranjo CA, Johnston RS, Silverman JM, Kleanthous H, Love JC, Mantis NJ, Joshi SB, Volkin DB. Antigen-adjuvant interactions, stability, and immunogenicity profiles of a SARS-CoV-2 receptor-binding domain (RBD) antigen formulated with aluminum salt and CpG adjuvants. Hum Vaccin Immunother 2022; 18:2079346. [PMID: 35666264 PMCID: PMC9621007 DOI: 10.1080/21645515.2022.2079346] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Low-cost, refrigerator-stable COVID-19 vaccines will facilitate global access and improve vaccine coverage in low- and middle-income countries. To this end, subunit-based approaches targeting the receptor-binding domain (RBD) of SARS-CoV-2 Spike protein remain attractive. Antibodies against RBD neutralize SARS-CoV-2 by blocking viral attachment to the host cell receptor, ACE2. Here, a yeast-produced recombinant RBD antigen (RBD-L452K-F490W or RBD-J) was formulated with various combinations of aluminum-salt (Alhydrogel®, AH; AdjuPhos®, AP) and CpG 1018 adjuvants. We assessed the effect of antigen-adjuvant interactions on the stability and mouse immunogenicity of various RBD-J preparations. While RBD-J was 50% adsorbed to AH and <15% to AP, addition of CpG resulted in complete AH binding, yet no improvement in AP adsorption. ACE2 competition ELISA analyses of formulated RBD-J stored at varying temperatures (4, 25, 37°C) revealed that RBD-J was destabilized by AH, an effect exacerbated by CpG. DSC studies demonstrated that aluminum-salt and CpG adjuvants decrease the conformational stability of RBD-J and suggest a direct CpG-RBD-J interaction. Although AH+CpG-adjuvanted RBD-J was the least stable in vitro, the formulation was most potent at eliciting SARS-CoV-2 pseudovirus neutralizing antibodies in mice. In contrast, RBD-J formulated with AP+CpG showed minimal antigen-adjuvant interactions, a better stability profile, but suboptimal immune responses. Interestingly, the loss of in vivo potency associated with heat-stressed RBD-J formulated with AH+CpG after one dose was abrogated by a booster. Our findings highlight the importance of elucidating the key interrelationships between antigen-adjuvant interactions, storage stability, and in vivo performance to enable successful formulation development of stable and efficacious subunit vaccines.
Collapse
Affiliation(s)
- Sakshi Bajoria
- Department of Pharmaceutical Chemistry, Vaccine Analytics and Formulation Center, University of Kansas, Lawrence, KS, USA
| | - Kawaljit Kaur
- Department of Pharmaceutical Chemistry, Vaccine Analytics and Formulation Center, University of Kansas, Lawrence, KS, USA
| | - Ozan S Kumru
- Department of Pharmaceutical Chemistry, Vaccine Analytics and Formulation Center, University of Kansas, Lawrence, KS, USA
| | - Greta Van Slyke
- Division of Infectious Diseases, Wadsworth Center, New York State Department of Health, Albany, NY, USA
| | - Jennifer Doering
- Division of Infectious Diseases, Wadsworth Center, New York State Department of Health, Albany, NY, USA
| | - Hayley Novak
- Division of Infectious Diseases, Wadsworth Center, New York State Department of Health, Albany, NY, USA
| | - Sergio A Rodriguez Aponte
- Department of Biological Engineering, Massachusetts Institute of Technology (MIT), Cambridge, MA, USA.,The Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Neil C Dalvie
- The Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA.,Department of Chemical Engineering, Massachusetts Institute of Technology (MIT), Cambridge, MA, USA
| | - Christopher A Naranjo
- The Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Ryan S Johnston
- The Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
| | | | | | - J Christopher Love
- The Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA.,Department of Chemical Engineering, Massachusetts Institute of Technology (MIT), Cambridge, MA, USA
| | - Nicholas J Mantis
- Division of Infectious Diseases, Wadsworth Center, New York State Department of Health, Albany, NY, USA
| | - Sangeeta B Joshi
- Department of Pharmaceutical Chemistry, Vaccine Analytics and Formulation Center, University of Kansas, Lawrence, KS, USA
| | - David B Volkin
- Department of Pharmaceutical Chemistry, Vaccine Analytics and Formulation Center, University of Kansas, Lawrence, KS, USA
| |
Collapse
|
6
|
Gralton KS, Doering J, Ngui E, Pan A, Schiffman R. Family resiliency and family functioning in Non-Hispanic Black and Non-Hispanic White families of preterm infants. J Pediatr Nurs 2022; 64:102-110. [PMID: 35248955 DOI: 10.1016/j.pedn.2022.02.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 02/06/2022] [Accepted: 02/17/2022] [Indexed: 11/15/2022]
Abstract
PURPOSE The purpose of this study was to examine the relationship between resiliency factors and family functioning in families of preterm infants (< 37 weeks gestation) from two different racial groups hospitalized in a neonatal intensive care unit (NICU). DESIGN AND METHODS A cross-sectional design was used at five Level III/IV NICUs in a Midwestern city/suburbs. Seventy-nine family units (24 Non-Hispanic Black and 55 Non-Hispanic White) completed four instruments that assessed families' use of specific resiliency factors and a measure of family functioning. Demographic data were also collected. RESULTS Using linear mixed modeling, the significant predictors of family functioning for both Non-Hispanic Black and Non-Hispanic White, even after adjusting for education, income and race, were the protective factors "hardiness" (coefficient = -0.021) and "resources" (coefficient = -0.0052). The fixed effects in the model accounted for 48% (Marginal R2 = 0.48) of the variance on family functioning and the fixed and random effects accounted for 59% (Conditional R2, 0.59) of the variance on family functioning. Sixteen percent of the total sample rated their family as dysfunctional. CONCLUSIONS Findings from this study suggest that assessment of protective factors related to hardiness and resources individualize nursing interventions to support the resiliency of both Non-Hispanic Black and Non-Hispanic White families, regardless of differences in income and education. Further research studying resiliency in families of preterm infants is needed to understand the impact on long-term family functioning. PRACTICE IMPLICATIONS Understandingindividual family strengths,through the identification of resiliency (protective and recovery) factors could predict at-risk families before discharge. In collaboration with other health care professionals, nurses can assess individual family needs and strengths, within the context of their socioeconomic environment, and the racial and cultural influences that are important to the family.
Collapse
Affiliation(s)
| | - Jennifer Doering
- College of Nursing, University of Wisconsin-Milwaukee, Milwaukee, WI, USA
| | - Emmanuel Ngui
- School of Public Health, University of Wisconsin-Milwaukee, Milwaukee, WI, USA
| | - Amy Pan
- Medical College of Wisconsin, WI, USA
| | - Rachel Schiffman
- College of Nursing, University of Wisconsin-Milwaukee, Milwaukee, WI, USA
| |
Collapse
|
7
|
Abstract
The issues of vaccine potency and stability constitute formidable challenges associated with the development and readiness of vaccines for biodefense. In most instances, the vaccines will be stockpiled (at considerable cost) for years and used only in the rare event of a public health emergency. It is therefore imperative that there be means to readily monitor overall stability of the stockpiled vaccines, preferably using reliable in vitro assays, without the need for expensive and labor-intensive animal studies. In this chapter, we describe an in vitro monoclonal antibody-based competition ELISA known as RiCoE for assessing the potency of a ricin toxin subunit vaccine. RiCoE can be applied to drug substance and drug products adsorbed to aluminum salts adjuvant. While RiCoE is specific for ricin toxin, the general methodologies and protocols described herein are amenable to virtually any subunit or even virus-like particle-based vaccine. Ultimately, RiCoE-like assays may replace or at least reduce the need for animal studies in vaccine potency determinations.
Collapse
Affiliation(s)
- Jennifer Doering
- Division of Infectious Diseases, Wadsworth Center, New York State Department of Health, Albany, NY, USA
| | - Greta Van Slyke
- Division of Infectious Diseases, Wadsworth Center, New York State Department of Health, Albany, NY, USA
| | | | - Nicholas J Mantis
- Division of Infectious Diseases, Wadsworth Center, New York State Department of Health, Albany, NY, USA.
| |
Collapse
|
8
|
Novak H, Doering J, Ehrbar D, Donini O, Mantis NJ. Durable Immunity to Ricin Toxin Elicited by a Thermostable, Lyophilized Subunit Vaccine. mSphere 2021; 6:e0075021. [PMID: 34730377 PMCID: PMC8565519 DOI: 10.1128/msphere.00750-21] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 10/15/2021] [Indexed: 11/26/2022] Open
Abstract
The development of vaccines against biothreat toxins like ricin (RT) is considered an integral component of the U.S. national security efforts. RiVax is a thermostable, lyophilized RT subunit vaccine adsorbed to aluminum salt adjuvant intended for use by military personnel and first responders. Phase 1 studies indicated that RiVax is safe and immunogenic, while a three-dose intramuscular vaccination regimen in nonhuman primates elicited protection against lethal dose RT challenge by aerosol. Here, we investigated, in a mouse model, the durability of RiVax-induced antibody responses and corresponding immunity to lethal dose RT challenge. Groups of mice were subcutaneously administered 3 or 1 μg of RiVax on days 0 and 21 and challenged with 10× 50% lethal dose (LD50) RT by injection at six different intervals over the course of 12 months. Serum antibody titers and epitope-specific competition assays were determined prior to each challenge. We report that the two-dose, 3-μg regimen conferred near-complete protection against RT challenge on day 35 and complete protection thereafter (challenge days 65, 95, 125, 245, and 365). The two-dose, 3-μg regimen was superior to the 1-μg regimen as revealed by slight differences in survival and morbidity scores (e.g., hypoglycemia, weight loss) on challenge days 35 and 365. In separate experiments, a single 3-μg RiVax vaccination proved only marginally effective at eliciting protective immunity to RT, underscoring the necessity of a prime-boost regimen to achieve full and long-lasting protection against RT. IMPORTANCE Ricin toxin (RT) is a notorious biothreat, as exposure to even trace amounts via injection or inhalation can induce organ failure and death within a matter of hours. In this study, we advance the preclinical testing of a candidate RT vaccine known as RiVax. RiVax is a recombinant nontoxic derivative of RT's enzymatic subunit that has been evaluated for safety in phase I clinical trials and efficacy in a variety of animal models. We demonstrate that two doses of RiVax are sufficient to protect mice from lethal dose RT challenge for up to 1 year. We describe kinetics and other immune parameters of the antibody response to RiVax and discuss how these immune factors may translate to humans.
Collapse
Affiliation(s)
- Hayley Novak
- Department of Biomedical Sciences, University at Albany, Albany, New York, USA
| | - Jennifer Doering
- Division of Infectious Disease, Wadsworth Center, New York State Department of Health, Albany, New York, USA
| | - Dylan Ehrbar
- Division of Infectious Disease, Wadsworth Center, New York State Department of Health, Albany, New York, USA
| | | | - Nicholas J. Mantis
- Department of Biomedical Sciences, University at Albany, Albany, New York, USA
- Division of Infectious Disease, Wadsworth Center, New York State Department of Health, Albany, New York, USA
| |
Collapse
|
9
|
Slocum SE, Wichman CL, Kuehn S, Doering J. Differences in Utilization of Perinatal Psychiatric Teleconsultation Line Between Primary Care and Mental Health Providers. WMJ 2021; 120:281-285. [PMID: 35025175] [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: 06/14/2023]
Abstract
PURPOSE Teleconsultation has been a newly recognized avenue by which to provide psychiatric services to perinatal populations being treated either by psychiatric or primary care providers. The Periscope Project (TPP) is a business-hours teleconsultation line providing enrolled clinicians with access to a subspecialty-trained psychiatrist, as well as community resources and provider education. This study examines the differences in consultation between enrolled providers. METHODS Encounter data was entered into REDCap by TPP's team members. Data was analyzed using summary statistics. Satisfaction information was attained by follow-up survey. RESULTS During the first 24 months of program activity, TPP had a total of 737 referred encounters, 70.4% from primary care and 20.5% from psychiatry. There were statistically significant differences between psychiatric and primary care providers in terms of recommendations for use of certain types of medications and use of diagnostic screenings, as well as differences in what providers would have recommended in absence of TPP's involvement. CONCLUSIONS Differences in enrollee's rationale for consultation allows for better understanding of the needs of front-line providers. Tailoring educational information and even teleconsultation information based on provider group can allow for more efficient patient care and resource utilization. Providers across the spectrum found TPP beneficial, indicating that continued availability to all providers caring for women of reproductive age is important.
Collapse
Affiliation(s)
- Sarah E Slocum
- Medical College of Wisconsin, Department of Psychiatry and Behavioral Medicine, Milwaukee, Wisconsin,
| | - Christina L Wichman
- Medical College of Wisconsin, Department of Psychiatry and Behavioral Medicine, Milwaukee, Wisconsin
| | - Shelby Kuehn
- Medical College of Wisconsin, Department of Psychiatry and Behavioral Medicine, Milwaukee, Wisconsin
| | - Jennifer Doering
- University of Wisconsin - Milwaukee, College of Nursing, Milwaukee, Wisconsin
| |
Collapse
|
10
|
Abstract
OBJECTIVE The purpose of this study was to assess the influence of nursing care on implementing perinatal risk-appropriate care in the context of maternal early warning criteria. DESIGN Medical record review and survey of maternity nurses in a three-hospital system in Wisconsin with two level I hospitals and 1 level III hospital. PARTICIPANTS Seven maternity nurses from the level III hospital conducted the medical record reviews and all maternity staff nurses from two level I hospitals were invited to complete the survey. MEASUREMENTS All medical records in 2017 that met these inclusion criteria: hypertension, sepsis, preeclampsia, hemorrhage, low Apgar scores, and transport were reviewed to assess identification and response time for maternal early warning signs using the Nurses Contribution to Maternal Mortality Worksheet. The survey included questions about influences on the nurses' confidence when interpreting early warning indicators. RESULTS Thirty-two medical records met inclusion criteria and were reviewed. The number of maternal early warning signs recorded ranged from one to four, with a mean of 1.75 indicators. Eighty percent of records documented increased evaluation as a nursing response to the maternal early warning signs. Time-lapse between notifying a provider and bedside evaluation was less than 15 minutes in 54% of cases. Of the 31 eligible nurses, 18 completed the survey (58% response rate). Personal knowledge (90%) was reported by nurses as being the greatest influence on nursing confidence. Sixty-nine percent of nurses reported not receiving patient information from team members at the transporting hospital. CONCLUSION A systematic record review by frontline nurses can monitor identification and response to maternal early warning signs. Feedback on patient transports can reinforce nurses' decision-making that has the potential to improve responsiveness to clinical warning signs.
Collapse
|
11
|
Dwyer D, Doering J, Casida J. A Conceptual Definition of Quality of Life for People Living with an Implanted Destination Therapy Left Ventricular Assist Device. J Heart Lung Transplant 2021. [DOI: 10.1016/j.healun.2021.01.1262] [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: 10/21/2022] Open
|
12
|
Doering J, Czajka T, Yates JL, Donini O, Mantis NJ. Potency determination of ricin toxin using a monoclonal antibody-based competition assay. J Immunol Methods 2020; 486:112844. [PMID: 32891616 DOI: 10.1016/j.jim.2020.112844] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 08/04/2020] [Accepted: 08/17/2020] [Indexed: 10/23/2022]
Abstract
Mouse challenge studies with death as an endpoint remain the gold standard in assessing the potency of ricin toxin, a Category B biothreat agent derived from the castor bean (Ricinus communis). However, animal studies are expensive, time consuming and ethically concerning. In an effort to reduce reliance on animals in vaccine development, we developed a monoclonal antibody (MAb)-based ricin competition ELISA (RiCoE) that indicates conformation integrity of ricin toxin. In forced degradation (heat-denaturation) experiments with native ricin holotoxin, we demonstrate a correlation between the decline in MAb reactivity in RiCoE and a corresponding loss of toxin potency in Vero cells (IC50) and mice (LD50). The RiCoE assay was applied to differentially sourced commercial lots of ricin toxin derived from R. communis blends and compared to toxin potency in mice. There was near perfect congruence between RiCoE values with two different MAbs (PB10, SyH7) and ricin potency in the mouse model using morbidity as an endpoint. In conclusion, we propose that RiCoE can serve as a rapid and sensitive substitute to mouse lethal dose challenge studies as a means to determine ricin toxin potency and will be valuable at various stages of vaccine development.
Collapse
Affiliation(s)
- Jennifer Doering
- Division of Infectious Disease, Wadsworth Center, New York State Department of Health, Albany, NY 12208, United States of America
| | - Timothy Czajka
- Department of Biomedical Sciences, University at Albany, Albany, NY 12201, United States of America
| | - Jennifer L Yates
- Division of Infectious Disease, Wadsworth Center, New York State Department of Health, Albany, NY 12208, United States of America
| | - Oreola Donini
- Soligenix, Inc., Princeton, NJ 08540, United States of America
| | - Nicholas J Mantis
- Division of Infectious Disease, Wadsworth Center, New York State Department of Health, Albany, NY 12208, United States of America; Department of Biomedical Sciences, University at Albany, Albany, NY 12201, United States of America.
| |
Collapse
|
13
|
Slyke GV, Ehrbar DJ, Doering J, Yates JL, Vitetta ES, Donini O, Mantis NJ. Endpoint and epitope-specific antibody responses as correlates of vaccine-mediated protection of mice against ricin toxin. Vaccine 2020; 38:6721-6729. [PMID: 32891474 DOI: 10.1016/j.vaccine.2020.08.047] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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: 04/24/2020] [Revised: 08/11/2020] [Accepted: 08/18/2020] [Indexed: 12/17/2022]
Abstract
The successful licensure of vaccines for biodefense is contingent upon the availability of well-established correlates of protection (CoP) in at least two animal species that can be applied to humans, without the need to assess efficacy in the clinic. In this report we describe a multivariate model that combines pre-challenge serum antibody endpoint titers (EPT) and values derived from an epitope profiling immune-competition capture (EPICC) assay as a predictor in mice of vaccine-mediated immunity against ricin toxin (RT), a Category B biothreat. EPICC is a modified competition ELISA in which serum samples from vaccinated mice were assessed for their ability to inhibit the capture of soluble, biotinylated (b)-RT by a panel of immobilized monoclonal antibodies (mAbs) directed against four immunodominant toxin-neutralizing regions on the enzymatic A chain (RTA) of RT. In a test cohort of mice (n = 40) vaccinated with suboptimal doses of the RTA subunit vaccine, RiVax®, we identified two mAbs, PB10 and SyH7, which had EPICC inhibition values in pre-challenge serum samples that correlated with survival following a challenge with 5 × LD50 of RT administered by intraperitoneal (IP) injection. Analysis of a larger cohort of mice (n = 645) revealed that a multivariate model combining endpoint titers and EPICC values for PB10 and SyH7 as predictive variables had significantly higher statistical power than any one of the independent variables alone. Establishing the correlates of vaccine-mediated protection in mice represents an important steppingstone in the development of RiVax® as a medical countermeasure under the United States Food and Drug Administration's "Animal Rule."
Collapse
Affiliation(s)
- Greta Van Slyke
- Division of Infectious Disease, Wadsworth Center, New York State Department of Health, Albany, NY 12208, United States
| | - Dylan J Ehrbar
- Division of Infectious Disease, Wadsworth Center, New York State Department of Health, Albany, NY 12208, United States
| | - Jennifer Doering
- Division of Infectious Disease, Wadsworth Center, New York State Department of Health, Albany, NY 12208, United States
| | - Jennifer L Yates
- Division of Infectious Disease, Wadsworth Center, New York State Department of Health, Albany, NY 12208, United States
| | - Ellen S Vitetta
- Department of Immunology and Microbiology, University of Texas Southwestern Medical School, Dallas, TX, United States
| | | | - Nicholas J Mantis
- Division of Infectious Disease, Wadsworth Center, New York State Department of Health, Albany, NY 12208, United States.
| |
Collapse
|
14
|
Mooney B, Torres‐Velez FJ, Doering J, Ehrbar DJ, Mantis NJ. Sensitivity of Kupffer cells and liver sinusoidal endothelial cells to ricin toxin and ricin toxin-Ab complexes. J Leukoc Biol 2019; 106:1161-1176. [PMID: 31313388 PMCID: PMC7008010 DOI: 10.1002/jlb.4a0419-123r] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 06/03/2019] [Accepted: 07/02/2019] [Indexed: 12/11/2022] Open
Abstract
Ricin toxin is a plant-derived, ribosome-inactivating protein that is rapidly cleared from circulation by Kupffer cells (KCs) and liver sinusoidal endothelial cells (LSECs)-with fatal consequences. Rather than being inactivated, ricin evades normal degradative pathways and kills both KCs and LSECs with remarkable efficiency. Uptake of ricin by these 2 specialized cell types in the liver occurs by 2 parallel routes: a "lactose-sensitive" pathway mediated by ricin's galactose/N-acetylgalactosamine-specific lectin subunit (RTB), and a "mannose-sensitive" pathway mediated by the mannose receptor (MR; CD206) or other C-type lectins capable of recognizing the mannose-side chains displayed on ricin's A (RTA) and B subunits. In this report, we investigated the capacity of a collection of ricin-specific mouse MAb and camelid single-domain (VH H) antibodies to protect KCs and LSECs from ricin-induced killing. In the case of KCs, individual MAbs against RTA or RTB afforded near complete protection against ricin in ex vivo and in vivo challenge studies. In contrast, individual MAbs or VH Hs afforded little (<40%) or even no protection to LSECs against ricin-induced death. Complete protection of LSECs was only achieved with MAb or VH H cocktails, with the most effective mixtures targeting RTA and RTB simultaneously. Although the exact mechanisms of protection of LSECs remain unknown, evidence indicates that the Ab cocktails exert their effects on the mannose-sensitive uptake pathway without the need for Fcγ receptor involvement. In addition to advancing our understanding of how toxins and small immune complexes are processed by KCs and LSECs, our study has important implications for the development of Ab-based therapies designed to prevent or treat ricin exposure should the toxin be weaponized.
Collapse
Affiliation(s)
- Bridget Mooney
- Division of Infectious DiseasesWadsworth CenterNew York State Department of HealthAlbanyNew YorkUSA
| | - Fernando J. Torres‐Velez
- Division of Infectious DiseasesWadsworth CenterNew York State Department of HealthAlbanyNew YorkUSA
| | - Jennifer Doering
- Division of Infectious DiseasesWadsworth CenterNew York State Department of HealthAlbanyNew YorkUSA
| | - Dylan J. Ehrbar
- Division of Infectious DiseasesWadsworth CenterNew York State Department of HealthAlbanyNew YorkUSA
| | - Nicholas J. Mantis
- Division of Infectious DiseasesWadsworth CenterNew York State Department of HealthAlbanyNew YorkUSA
| |
Collapse
|
15
|
Rong Y, Torres-Velez FJ, Ehrbar D, Doering J, Song R, Mantis NJ. An intranasally administered monoclonal antibody cocktail abrogates ricin toxin-induced pulmonary tissue damage and inflammation. Hum Vaccin Immunother 2019; 16:793-807. [PMID: 31589555 DOI: 10.1080/21645515.2019.1664243] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [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: 01/04/2023] Open
Abstract
Ricin toxin, a plant-derived, mannosylated glycoprotein, elicits an incapacitating and potentially lethal inflammatory response in the airways following inhalation. Uptake of ricin by alveolar macrophages (AM) and other pulmonary cell types occurs via two parallel pathways: one mediated by ricin's B subunit (RTB), a galactose-specific lectin, and one mediated by the mannose receptor (MR;CD206). Ricin's A subunit (RTA) is a ribosome-inactivating protein that triggers apoptosis in mammalian cells. It was recently reported that a single monoclonal antibody (MAb), PB10, directed against an immunodominant epitope on RTA and administered intravenously, was able to rescue Rhesus macaques from lethal aerosol dose of ricin. In this study, we now demonstrate in mice that the effectiveness PB10 is significantly improved when combined with a second MAb, SylH3, against RTB. Mice treated with PB10 alone survived lethal-dose intranasal ricin challenge, but experienced significant weight loss, moderate pulmonary inflammation (e.g., elevated IL-1 and IL-6 levels, PMN influx), and apoptosis of lung macrophages. In contrast, mice treated with the PB10/SylH3 cocktail were essentially impervious to pulmonary ricin toxin exposure, as evidenced by no weight loss, no change in local IL-1 and IL-6 levels, retention of lung macrophages, and a significant dampening of PMN recruitment into the bronchoalveolar lavage (BAL) fluids. The PB10/SylH3 cocktail only marginally reduced ricin binding to target cells in the BAL, suggesting that the antibody mixture neutralizes ricin by interfering with one or more steps in the RTB- and MR-dependent uptake pathways.
Collapse
Affiliation(s)
- Yinghui Rong
- New York State Department of Health, Division of Infectious Disease, Wadsworth Center, Albany, NY, USA
| | - Fernando J Torres-Velez
- New York State Department of Health, Division of Infectious Disease, Wadsworth Center, Albany, NY, USA
| | - Dylan Ehrbar
- New York State Department of Health, Division of Infectious Disease, Wadsworth Center, Albany, NY, USA
| | - Jennifer Doering
- New York State Department of Health, Division of Infectious Disease, Wadsworth Center, Albany, NY, USA
| | - Renjie Song
- New York State Department of Health, Division of Infectious Disease, Wadsworth Center, Albany, NY, USA
| | - Nicholas J Mantis
- New York State Department of Health, Division of Infectious Disease, Wadsworth Center, Albany, NY, USA
| |
Collapse
|
16
|
Mack D, Poulard K, Goddard M, Snyder J, Grange R, Doering J, Strande J, Latournerie V, Veron P, Yang L, Buscara L, Le Bec C, Martin S, O'Callaghan M, Mingozzi F, Beggs A, Lawlor M, Mavilio F, Childers M, Buj-Bello A. Peripheral vein injection of AAV8-MTM1 leads to long-term survival and correction of severe muscle pathology in a canine model of X-linked myotubular myopathy: Results from a dose escalation study. Neuromuscul Disord 2015. [DOI: 10.1016/j.nmd.2015.06.318] [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: 11/16/2022]
|
17
|
Mack D, Goddard M, Snyder J, Doering J, Lawlor M, Moullier P, O’Callaghan M, Beggs A, Mavilio F, Poulard K, Latournerie V, Buj-Bello A, Childers M. G.P.41. Neuromuscul Disord 2014. [DOI: 10.1016/j.nmd.2014.06.055] [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: 11/29/2022]
|
18
|
Childers M, Joubert R, Poulard K, Holder M, Grange R, Doering J, Lawlor M, Moal C, Jamet T, Danièle N, Martin C, Rivière C, Poppante K, Soker T, Hammer C, Van Wittenberghe L, Guan X, Goddard M, Mitchell E, Barber J, Furth M, Vignaud A, Masurier C, Moullier P, Beggs A, Buj-Bello A. P.4.3 Intravenous infusion of AAV8–MTM1 prolongs life and ameliorates severe muscle pathology in mouse and dog models of X-linked myotubular myopathy. Neuromuscul Disord 2013. [DOI: 10.1016/j.nmd.2013.06.441] [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: 10/26/2022]
|
19
|
Abstract
There is a need for interventions that address postpartum fatigue and sleep problems. Of the women who experience this, few receive the needed nursing care during the weeks after childbirth when severe postpartum fatigue and poor sleep are most prevalent. These health problems are significant not only for the well-being of the new mother, but for her infant and other family members. This article outlines four steps in applying theory in research, using a "top-down and bottom-up" approach to develop a nursing intervention for self-management of postpartum fatigue and sleep.
Collapse
Affiliation(s)
- Jennifer Doering
- University of Wisconsin - Milwaukee, College of Nursing, Milwaukee, WI 53211, USA.
| |
Collapse
|
20
|
Abstract
Prolonged skin-to-skin contact (SSC) between mothers and newborns in the hour after birth is associated with physiologic and psychological benefits for both mothers and infants, yet this is not a standard practice at all birthing facilities. The purpose of the project described in this article was to implement SSC immediately aft er birth for healthy term newborns as a routine, evidence-based practice in a labor and delivery unit at a Midwestern U.S. academic medical center. When incorporated into routine newborn care, SSC promotes key maternal-infant health outcomes of importance to quality nursing care.
Collapse
Affiliation(s)
- Dawn Haxton
- Women’s Health and Obstetrics at Aurora Lakeland Medical Center, Elkhorn, WI, USA
| | | | | | | |
Collapse
|
21
|
Abstract
Nurse educators are calling for the transformation of nursing education toward curricula that promote clinical reasoning through reflective practice and understanding of patient experiences in an effort to motivate students to become change agents. Study abroad programs can play an important role in this transformation through educating nurses in the delivery of culturally safe health care in a diverse world. Exposing nursing students to study abroad experiences that are guided by critical approaches such as a postcolonial feminist framework provides nursing students with opportunities to be immersed in the life and culture of people who have a completely different positioning and location while reflecting on the "us" versus "them" phenomenon that is pervasive in modern Western society and generates negative cultural comparisons. Attention to the design and implementation of such programs is important if nursing schools in the Western world are to uphold ethical standards, promote equality in relationships with host communities and avoid inadvertent exploitation and marginalization of vulnerable peoples. We present the development and implementation of a community health study abroad program for American nursing students in Malawi, Africa using a postcolonial feminist framework.
Collapse
|
22
|
Seeger A, Fenchel M, Doering J, Kramer U, Klumpp B, Claussen CD, Miller S. Whole-body MR angiography using two-dimensional parallel imaging (iPAT2) at 3T. ROFO-FORTSCHR RONTG 2009. [DOI: 10.1055/s-0028-1124049] [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: 10/21/2022]
|
23
|
Doering J, Begue B, Lentze MJ, Rieux-Laucat F, Goulet O, Schmitz J, Cerf-Bensussan N, Ruemmele FM. Induction of T lymphocyte apoptosis by sulphasalazine in patients with Crohn's disease. Gut 2004; 53:1632-8. [PMID: 15479684 PMCID: PMC1774288 DOI: 10.1136/gut.2003.037911] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
BACKGROUND Lamina propria T lymphocytes (LPL) of the intestinal mucosa are chronically activated in Crohn's disease (CD). Defective apoptosis of activated LPL was proposed as a key pathogenic mechanism. In fact, increased expression of antiapoptotic molecules was observed in CD LPL. In the present work, we aimed to analyse the effects and underlying molecular mechanisms of 5-amino salicylic acid (5-ASA) and derivatives on apoptosis of LPL and peripheral blood lymphocytes (PBL) in patients with CD compared with ulcerative colitis (UC) and in non-inflammatory controls. METHODS PBL and LPL were isolated by Ficoll-Hypopaque gradient centrifugation and the EGTA-collagenase method, respectively. PBL/LPL were stimulated with FasL, 5-ASA, sulphapyridine, and sulphasalazine for 24/48 hours and apoptosis was quantified by flow cytometry (annexin V- propidium iodide method) and immunofluorescence. The molecular mechanisms of drug induced apoptosis were analysed in wild-type and FADD-/- Jurkat T cells using western blots and caspase assays. RESULTS While PBL displayed a normal apoptosis pattern after Fas stimulation in patients with active CD, LPL from inflammatory areas were highly resistant. Comparable resistance to apoptosis was observed in LPL of UC patients. In contrast with 5-ASA, which did not induce apoptosis in lymphocytes, sulphasalazine proved to be a potent proapoptotic agent. Sulphasalazine induced T lymphocyte apoptosis was independent of the Fas pathway but associated with marked downregulation of antiapoptotic bcl-xl and bcl2, activation of the mitochondrial apoptosis signalling pathway, and subsequent activation of caspase-9 and caspase-3. CONCLUSION The beneficial effect of sulphasalazine in treating inflammatory bowel disease is at least in part attributable to its proapoptotic effects on LPL which allows potent downregulation of lymphocyte activation.
Collapse
Affiliation(s)
- J Doering
- Hôpital Necker-Enfants Malades, Paediatric Gastroenterology, INSERM EMI 0212, University Paris V, 149, Rue de Sèvres, F-75743 Paris, Cedex 15, France
| | | | | | | | | | | | | | | |
Collapse
|
24
|
Thupvong T, Wiideman A, Dunn D, Oreschak K, Jankowicz B, Doering J, Castignetti D. Sequence heterogeneity of the ferripyoverdine uptake (fpvA), but not the ferric uptake regulator (fur), genes among strains of the fluorescent pseudomonads Pseudomonas aeruginosa, Pseudomonas aureofaciens, Pseudomonas fluorescens and Pseudomonas putida. Biometals 1999; 12:265-74. [PMID: 10581691 DOI: 10.1023/a:1009270302536] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Pseudomonas aeruginosa, Pseudomonas aureofaciens, Pseudomonas fluorescens and Pseudomonas putida are of importance to medicine, agriculture and biocycling. These microbes acquire ferric ion via the use of the siderophores pyochelin and the family known as the pyoverdines or pseudobactins. The ferric uptake regulator (fur) gene is responsible, at least in part, for the regulation of siderophore synthesis and uptake in P. aeruginosa. To determine whether the organisms contain single or multiple homologues of the siderophore-related genes fpvA (ferripyoverdine uptake) and fur, and whether these homologues displayed sequence heterogeneity, their chromosomal DNAs were probed with fur and fpvA sequences. As a representative of a non-fluorescent pseudomonad, the bacterium Burkholderia (Pseudomonas) cepacia was also examined. The pseudomonads all contained fpvA- and fur-like homologues, and heterogeneity was observed among the different species. The presence of two or more fpvA-like genes is indicated in all of the fluorescent pseudomonads surveyed. In contrast, B. cepacia DNA either did not hybridize to these probes, or did so only very weakly, suggesting that fur- and fpvA-like homologues are either absent or significantly different in B. cepacia compared to the fluorescent pseudomonads examined.
Collapse
Affiliation(s)
- T Thupvong
- Department of Biology, Loyola University of Chicago, IL 60626, USA
| | | | | | | | | | | | | |
Collapse
|
25
|
Korenberg JR, Aaltonen J, Brahe C, Cabin D, Creau N, Delabar JM, Doering J, Gardiner K, Hubert RS, Ives J, Kessling A, Kudoh J, Lafrenière R, Murakami Y, Ohira M, Ohki M, Patterson D, Potier MC, Quackenbush J, Reeves RH, Sakaki Y, Shimizu N, Soeda E, Van Broeckhoven C, Yaspo ML. Report and abstracts of the Sixth International Workshop on Human Chromosome 21 Mapping 1996. Cold Spring Harbor, New York, USA. May 6-8,1996. Cytogenet Cell Genet 1998; 79:21-52. [PMID: 9533011 DOI: 10.1159/000134681] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- J R Korenberg
- Medical Genetics Birth Defects Center, UCLA School of Medicine 90048, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
26
|
Abstract
Quick-blot, a method for selectively immobilizing either mRNA or DNA on nitrocellulose, is described in detail. Essential elements of the procedure for immobilizing DNA include tissue lysis, proteinase K treatment, solubilization of nucleic acids in hot 12.2 molal NaI, passage through a nitrocellulose filter, and acetylation of residual protein with acetic anhydride. Advantages include speed, quantitative recovery, low background, and elimination of the usual baking step. Essential elements of the procedure for selectively immobilizing mRNA include dissolving cells in Brij-35 and desoxycholate, proteinase K treatment, solubilizing nucleic acids in room temperature 12.2 molal NaI, filtration through nitrocellulose, and acetylation of residual protein. Advantages include selective immobilization of mRNA but not tRNA, rRNA, or DNA, and the maintenance of biological activity of the immobilized mRNA. Control experiments to optimize the procedures and examples of their application are shown.
Collapse
|