Catalogue Search | MBRL
Are you sure you want to remove the book from the shelf?
{{itemTitle}}
6
result(s) for
"Pham, Jody"
Sort by:
Germline-encoded neutralization of a Staphylococcus aureus virulence factor by the human antibody repertoire
Staphylococcus aureus
is both an important pathogen and a human commensal. To explore this ambivalent relationship between host and microbe, we analysed the memory humoral response against IsdB, a protein involved in iron acquisition, in four healthy donors. Here we show that in all donors a heavily biased use of two immunoglobulin heavy chain germlines generated high affinity (pM) antibodies that neutralize the two IsdB NEAT domains, IGHV4-39 for NEAT1 and IGHV1-69 for NEAT2. In contrast to the typical antibody/antigen interactions, the binding is primarily driven by the germline-encoded hydrophobic CDRH-2 motifs of IGHV1-69 and IGHV4-39, with a binding mechanism nearly identical for each antibody derived from different donors. Our results suggest that IGHV1-69 and IGHV4-39, while part of the adaptive immune system, may have evolved under selection pressure to encode a binding motif innately capable of recognizing and neutralizing a structurally conserved protein domain involved in pathogen iron acquisition.
Staphylococcus aureus
can both cause disease in humans and be present with no discernible effect. Here, the authors look in detail at the memory immune response against a protein involved in iron acquisition.
Journal Article
Perspectives on recovery from older adult trauma survivors living in rural areas
BackgroundOlder patients living in rural areas face unique challenges after trauma that may hinder optimal recovery. This study aims to qualitatively assess postdischarge challenges in this vulnerable population.MethodsWe conducted remote interviews with older trauma survivors in Washington State previously hospitalized in 2019 and residing in rural areas as determined by rural–urban commuting area code. Participants were identified through our institution’s trauma registry and linked with postdischarge data. All eligible participants were contacted. Interview questions focused on needs relating to discharge transition, medical needs, housing, and daily living. Transcribed interviews underwent content analysis to derive a code hierarchy and themes.ResultsWe conducted 18 interviews out of 83 survivors queried. Compared with non-participants, interviewees had a higher rate of secondary insurance (61% vs 34%), and fewer had an emergency department visit within 1 year (22% vs 34%). Content analysis yielded four major themes: discharge transitions, loss of control, rural insights, and self-efficacy. Most patients felt prepared for discharge and had social support. Regardless of disposition type, most patients needed therapy sessions after discharge. Geography and transportation issues were among the biggest barriers. Most participants were never offered a telemedicine appointment but would have used it if offered. Subthemes of self-efficacy included financial security, leisure, personal outlook, physical and logistical resources, and participants’ support systems.DiscussionOlder trauma patients from rural areas face unique challenges after discharge. Key strategies to improve patient experience might include more telemedicine appointments and increased awareness of resources in rural communities.Level of evidenceIII.
Journal Article
Assessment of serum total 25-hydroxyvitamin D assay commutability of Standard Reference Materials and College of American Pathologists Accuracy-Based Vitamin D (ABVD) Scheme and Vitamin D External Quality Assessment Scheme (DEQAS) materials: Vitamin D Standardization Program (VDSP) Commutability Study 2
An interlaboratory study was conducted through the Vitamin D Standardization Program (VDSP) to assess commutability of Standard Reference Materials® (SRMs) and proficiency testing/external quality assessment (PT/EQA) samples for determination of serum total 25-hydroxyvitamin D [25(OH)D] using ligand binding assays and liquid chromatography-tandem mass spectrometry (LC-MS/MS). A set of 50 single-donor serum samples were assigned target values for 25-hydroxyvitamin D2 [25(OH)D2] and 25-hydroxyvitamin D3 [25(OH)D3] using reference measurement procedures (RMPs). SRM and PT/EQA samples evaluated included SRM 972a (four levels), SRM 2973, six College of American Pathologists (CAP) Accuracy-Based Vitamin D (ABVD) samples, and nine Vitamin D External Quality Assessment Scheme (DEQAS) samples. Results were received from 28 different laboratories using 20 ligand binding assays and 14 LC-MS/MS methods. Using the test assay results for total serum 25(OH)D (i.e., the sum of 25(OH)D2 and 25(OH)D3) determined for the single-donor samples and the RMP target values, the linear regression and 95% prediction intervals (PIs) were calculated. Using a subset of 42 samples that had concentrations of 25(OH)D2 below 30 nmol/L, one or more of the SRM and PT/EQA samples with high concentrations of 25(OH)D2 were deemed non-commutable using 5 of 11 unique ligand binding assays. SRM 972a (level 4), which has high exogenous concentration of 3-epi-25(OH)D3, was deemed non-commutable for 50% of the LC-MS/MS assays.
Journal Article
Sequence and analysis of chromosome 1 of the plant Arabidopsis thaliana
The genome of the flowering plant
Arabidopsis thaliana
has five chromosomes
1
,
2
. Here we report the sequence of the largest, chromosome 1, in two contigs of around 14.2 and 14.6 megabases. The contigs extend from the telomeres to the centromeric borders, regions rich in transposons, retrotransposons and repetitive elements such as the 180-base-pair repeat. The chromosome represents 25% of the genome and contains about 6,850 open reading frames, 236 transfer RNAs (tRNAs) and 12 small nuclear RNAs. There are two clusters of tRNA genes at different places on the chromosome. One consists of 27 tRNA
Pro
genes and the other contains 27 tandem repeats of tRNA
Tyr
-tRNA
Tyr
-tRNA
Ser
genes. Chromosome 1 contains about 300 gene families with clustered duplications. There are also many repeat elements, representing 8% of the sequence.
Journal Article
