A Case of Dermatomyositis with High-titer Anti-toxoplasma Antibody

2006 ◽  
Vol 68 (2) ◽  
pp. 138-141
Author(s):  
Yukie WATANABE ◽  
Akimichi MORITA
Keyword(s):  
High Titer

Inhibitorentwicklung nach früher hoher Exposition und Hirnblutung

2010 ◽  
Vol 30 (S 01) ◽  
pp. S115-S118
Author(s):  
C. Moorthi ◽  
A. Bade ◽  
C. Niekrens ◽  
G. Auerswald ◽  
K. Haubold
Keyword(s):  
High Titer ◽  
Cerebral Haemorrhage ◽  
High Dose ◽  
Haemophilia A ◽  
Severe Haemophilia ◽  
Intron 22 Inversion ◽  
Neurosurgical Intervention

SummarySevere haemophilia A was diagnosed postpartum in a newborn. The mother was known as a conductor (intron 22 inversion) and an uncle had a persistently high titer inhibitor after failed ITI.Due to a cephalhaematoma, a high-dose pdFVIII substitution was given within the first days after birth. At the age of six month a severe cerebral haemorrhage occurred, making a high-dose pdFVIII substitution and neurosurgical intervention necessary. Several days later a porth-a-cath-system was implanted. The development of a high titer inhibitor occured six days later, an ITI was started according to the Bonn Protocol. Initially rFVIIa was given in addition to the pdFVIII substitution. Seven days after the beginning of treatment the inhibitor was no longer detectable. At monthly intervals the FVIII dosage was reduced until the dosage complied with a prophylaxis in severe haemophilia A.The duration of the ITI was nine months. A total of 30 mg rFVIIa and 276 000 IU pdFVIII were used; costs in total: 280 173.60 Euro.

An IgA High-Titer Cold Agglutinin with an Unusual Blood Group Specificity within the Pr Complex

Vox Sanguinis ◽  
1973 ◽  
Vol 25 (1) ◽  
pp. 32-38 ◽  
Author(s):  
G. Garratty ◽  
L.D. Petz ◽  
I. Brodsky ◽  
H.H. Fudenberg
Keyword(s):  
Blood Group ◽  
High Titer ◽  
Cold Agglutinin ◽  
Group Specificity

scholarly journals Multiplex Assays of Luminex for Identification of COVID-19 Antibodies in Patient Serum: Performance Evaluation and Comparison to ELISA

2020 ◽  
Vol 154 (Supplement_1) ◽  
pp. S92-S92
Author(s):  
M S Shapiro ◽  
X Wang ◽  
D R Mendu ◽  
A Firpo
Keyword(s):  
Dynamic Range ◽  
High Titer ◽  
Mount Sinai Hospital ◽  
Antibody Testing ◽  
Luminex Assay ◽  
Multiplex Assays ◽  
Negative Results ◽  
Broad Dynamic Range ◽  
Circulating Antibodies ◽  
Mount Sinai

Abstract Introduction/Objective Mount Sinai Hospital has received emergency use authorization (EUA) from the FDA for Coronavirus Disease 2019 (COVID-19) antibody testing using ELISA. This serological assay detects and titrates the presence of circulating antibodies to COVID-19. Other platforms have aimed to achieve the credentials of the ELISA instrument, including the multiplex assays of Luminex. The platform is known to have a greater throughput (384 wells vs. 96 wells per microplate) and faster processing speed (8 hours vs. 17 hours). Methods Luminex utilizes beads that couple to the same COVID-19 antigens (mRBD and mSpike) which were utilized for the ELISA assay. The beads are read determining the mean fluorescence intensity (MFI). In order to compare the two methods, our study included 61 patients with COVID-19 at Mount Sinai Hospital, to screen and titrate their sera using Luminex, and to correspond the MFI values with the ELISA titers. Results The Luminex assay has achieved the same level of confidence as ELISA. The 61 patients, representing 30 negatives and 31 positives, are consistently identified as such on both platforms. Our data highlights 32% of patients with a low titer (<1:160), 42% of patients with a high titer (1:160 ~ 1:320), and 26% of patients with a very high titer level (>1:320). These titers correlated well with the MFI values. Based on a cutoff of 80,000 MFI, the sensitivity and specificity of the assay is 98% and 85%, respectively, with no overlapping of MFI between positive and negative results. Conclusion Overall, the study has demonstrated that the Luminex is a strong alternative for the ELISA platform. The Luminex highlights the broad dynamic range with no overlapping between positives and negatives. Migration from ELISA to Luminex, a platform with faster and greater throughput, is therefore, highly desirable.

scholarly journals Numaswitch: an efficient high-titer expression platform to produce peptides and small proteins

AMB Express ◽  
2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Bach-Ngan Nguyen ◽  
Florian Tieves ◽  
Thomas Rohr ◽  
Hilke Wobst ◽  
Felix S. Schöpf ◽  
...  
Keyword(s):  
Fermentation Broth ◽  
High Titer ◽  
New Technology ◽  
Active Pharmaceutical Ingredients ◽  
Pharmaceutical Ingredients ◽  
Expression Platform ◽  
Small Proteins ◽  
Production Platform ◽  
Β Amyloid ◽  
Cost Efficient

AbstractThe production of peptides as active pharmaceutical ingredients (APIs) by recombinant technologies is of emerging interest. A reliable production platform, however, is still missing due the inherent characteristics of peptides such as proteolytic sensitivity, aggregation and cytotoxicity. We have developed a new technology named Numaswitch solving present limitations. Numaswitch was successfully employed for the production of diverse peptides and small proteins varying in length, physicochemical and functional characteristics, including Teriparatide, Linaclotide, human β-amyloid and Serum amyloid A3. Additionally, the potential of Numaswitch for a cost-efficient commercial production is demonstrated yielding > 2 g Teriparatide per liter fermentation broth in a quality meeting API standard.

scholarly journals An epitope-based malaria vaccine targeting the junctional region of circumsporozoite protein

npj Vaccines ◽  
2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Lucie Jelínková ◽  
Hugo Jhun ◽  
Allison Eaton ◽  
Nikolai Petrovsky ◽  
Fidel Zavala ◽  
...  
Keyword(s):  
Mouse Model ◽  
Malaria Vaccine ◽  
High Titer ◽  
Circumsporozoite Protein ◽  
Infection Model ◽  
Vaccine Platform ◽  
Junctional Region ◽  
Mouse Infection Model ◽  
Virus Like Particle ◽  
Major Surface

AbstractA malaria vaccine that elicits long-lasting protection and is suitable for use in endemic areas remains urgently needed. Here, we assessed the immunogenicity and prophylactic efficacy of a vaccine targeting a recently described epitope on the major surface antigen on Plasmodium falciparum sporozoites, circumsporozoite protein (CSP). Using a virus-like particle (VLP)-based vaccine platform technology, we developed a vaccine that targets the junctional region between the N-terminal and central repeat regions of CSP. This region is recognized by monoclonal antibodies, including mAb CIS43, that have been shown to potently prevent liver invasion in animal models. We show that CIS43 VLPs elicit high-titer and long-lived anti-CSP antibody responses in mice and is immunogenic in non-human primates. In mice, vaccine immunogenicity was enhanced by using mixed adjuvant formulations. Immunization with CIS43 VLPs conferred partial protection from malaria infection in a mouse model, and passive transfer of serum from immunized macaques also inhibited parasite liver invasion in the mouse infection model. Our findings demonstrate that a Qβ VLP-based vaccine targeting the CIS43 epitope combined with various adjuvants is highly immunogenic in mice and macaques, elicits long-lasting anti-CSP antibodies, and inhibits parasite infection in a mouse model. Thus, the CIS43 VLP vaccine is a promising pre-erythrocytic malaria vaccine candidate.

Randomized Trials Comparing Inactivated Vaccine After Medium- or High-titer Measles Vaccine With Standard Titer Measles Vaccine After Inactivated Vaccine

2016 ◽  
Vol 35 (11) ◽  
pp. 1232-1241 ◽  
Author(s):  
Peter Aaby ◽  
Henrik Ravn ◽  
Christine S. Benn ◽  
Amabelia Rodrigues ◽  
Badara Samb ◽  
...  
Keyword(s):  
Randomized Trials ◽  
High Titer ◽  
Inactivated Vaccine ◽  
Measles Vaccine

scholarly journals Genome-scale target identification in Escherichia coli for high-titer production of free fatty acids

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Lixia Fang ◽  
Jie Fan ◽  
Shulei Luo ◽  
Yaru Chen ◽  
Congya Wang ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Fatty Acids ◽  
Free Fatty Acids ◽  
Stress Responses ◽  
Metabolic Networks ◽  
Target Identification ◽  
High Titer ◽  
Cell Factory ◽  
Microbial Cell Factory ◽  
Ffa Metabolism

AbstractTo construct a superior microbial cell factory for chemical synthesis, a major challenge is to fully exploit cellular potential by identifying and engineering beneficial gene targets in sophisticated metabolic networks. Here, we take advantage of CRISPR interference (CRISPRi) and omics analyses to systematically identify beneficial genes that can be engineered to promote free fatty acids (FFAs) production in Escherichia coli. CRISPRi-mediated genetic perturbation enables the identification of 30 beneficial genes from 108 targets related to FFA metabolism. Then, omics analyses of the FFAs-overproducing strains and a control strain enable the identification of another 26 beneficial genes that are seemingly irrelevant to FFA metabolism. Combinatorial perturbation of four beneficial genes involving cellular stress responses results in a recombinant strain ihfAL−-aidB+-ryfAM−-gadAH−, producing 30.0 g L−1 FFAs in fed-batch fermentation, the maximum titer in E. coli reported to date. Our findings are of help in rewiring cellular metabolism and interwoven intracellular processes to facilitate high-titer production of biochemicals.

scholarly journals Hospital-Based Donor Recruitment and Predonation Serologic Testing for COVID-19 Convalescent Plasma

2021 ◽  
Author(s):  
Joanna Balcerek ◽  
Evelin Trejo ◽  
Kendall Levine ◽  
Paul Couey ◽  
Zoe V Kornberg ◽  
...  
Keyword(s):  
Blood Donation ◽  
High Titer ◽  
Igg Antibodies ◽  
Serologic Testing ◽  
Wide Range ◽  
The Us ◽  
Polymerase Chain ◽  
Igg Level ◽  
Donor Recruitment ◽  
Selection Of

Abstract Objectives Serologic testing for antibodies to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in potential donors of coronavirus disease 2019 (COVID-19) convalescent plasma (CCP) may not be performed until after blood donation. A hospital-based recruitment program for CCP may be an efficient way to identify potential donors prospectively Methods Patients who recovered from known or suspected COVID-19 were identified and recruited through medical record searches and public appeals in March and April 2020. Participants were screened with a modified donor history questionnaire and, if eligible, were asked for consent and tested for SARS-CoV-2 antibodies (IgG and IgM). Participants positive for SARS-CoV-2 IgG were referred for CCP collection. Results Of 179 patients screened, 128 completed serologic testing and 89 were referred for CCP donation. IgG antibodies to SARS-CoV-2 were detected in 23 of 51 participants with suspected COVID-19 and 66 of 77 participants with self-reported COVID-19 confirmed by polymerase chain reaction (PCR). The anti–SARS-CoV-2 IgG level met the US Food and Drug Administration criteria for “high-titer” CCP in 39% of participants confirmed by PCR, as measured by the Ortho VITROS IgG assay. A wide range of SARS-CoV-2 IgG levels were observed. Conclusions A hospital-based CCP donor recruitment program can prospectively identify potential CCP donors. Variability in SARS-CoV-2 IgG levels has implications for the selection of CCP units for transfusion.

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