Biomedical subjects

R Laird

Publications and source records attributed to R Laird.

11 recordsLinked to original sources

PubMed2005

Use of the genomic matching technique to complement multiplex STR profiling reduces DNA profiling costs in high volume crimes and intelligence led screens.

The genomic matching technique (GMT) targets duplicated polymorphic sequences within genomic blocks in the human major histocompatibility complex (MHC), differentiating between individuals at the DNA level using a single primer pair per block. The GMT is currently used to supplement human leukocyte antigen (HLA) typing to match donor and recipient pairs for bone marrow transplantation and has the potential to be employed as a powerful exclusion tool in forensic biology. The GMT is highly reproducible, produces DNA profiles from less than 1 ng of DNA and was successfully employed to profile a range of forensic samples including buccal swabs, handled objects and fingerprints. Furthermore, GMT profiles from a single genomic block in the MHC are likely to be more discriminatory than known highly polymorphic short tandem repeat (STR) loci such as ACTBP2. As such, the GMT can reduce the cost of investigations that require profiling of multiple suspects or samples from one or more crime scenes and could be extended to profile genomic blocks in other polymorphic genetic systems in the human genome.

DNA Fingerprinting↗

PubMed2000

Cloning, sequencing, and functional characterization of the rat homologue of receptor activator of NF-kappaB ligand.

A complementary DNA (cDNA) encoding the rat homologue of receptor activator of NF-kappaB ligand/osteoprotegerin ligand/osteoclast differentiation factor/tumor necrosis factor (TNF)-related activation-induced cytokine (RANKL/OPGL/ODF/TRANCE) was cloned and sequenced from tibias of ovariectomized (OVX) rats. The predicted amino acid sequence of rat RANKL (rRANKL) has 84% and 96% identity to that of human and mouse RANKL, respectively, and 35% and 37% similarity to that of human and mouse TNF-related apoptosis-inducing ligand (TRAIL), respectively. RANKL transcripts were expressed abundantly in the thymus and bone tissues of OVX rats. rRANKL has a single hydrophobic region between residues 53 and 69, which is most likely to serve as a transmembrane domain. The long C-terminal region containing beta-sheet-forming sequences of the TNF-like core is considered the extracellular region. Three truncated domains within the TNF-like core region were expressed as glutathione S-transferase (GST) fusion proteins and investigated for their ability to induce osteoclastogenesis. The results showed that GST-rRANKL (aa160-318) containing the full TNF-like core region had the highest capability to induce the formation of osteoclast-like cells from RAW264.7 cells. GST-rRANKL (aa239-318 and aa160-268) had lesser degrees of osteoclast inductivity. Furthermore, the GST-rRANKL (aa160-318) is capable of (1) inducing osteoclast formation from rat spleen cells in the presence of macrophage colony-stimulating factor (M-CSF), (2) stimulating mature rat osteoclast polarization and bone resorption ex vivo, and (3) inducing systemic hypercalcemia in vivo; thus the full TNF-like core region of rRANKL is an important regulator of calcium homeostasis and osteoclastic function.

Amino Acid Sequence↗

PubMed2000

A case-oriented web-based curriculum in geriatrics for third-year medical students.

OBJECTIVES: This paper describes the development, implementation, and evaluation of a case-oriented, web-based curriculum in geriatric medicine for third-year medical students. DESIGN: Single cohort, pre/post trial. SETTING: University of Kansas School of Medicine, Kansas City, Kansas. PARTICIPANTS: Third-year medical students (n = 130). INTERVENTION: A web-based curriculum, offered during a clinical geriatrics clerkship, is composed of 13 case-oriented, web-based modules spanning key topics in geriatric medicine. Each module topic is also reviewed in a post-module, faculty-led discussion session. MEASUREMENTS: A pre-and post-rotation test of knowledge was completed. Student feedback about the curriculum was collected through web-based and written evaluation. MAIN RESULTS: Pre-and post-rotation comparison of examination scores demonstrated an average increase of 13 correct items on a 40-item exam. Seventy-five percent of students rated each module favorably at the time of completion (range 53-89%). Most modules (10/13) were rated as excellent or good after all modules had been completed. CONCLUSIONS: A case-oriented web-based curriculum in geriatrics was rated favorably by third-year medical students. Students' knowledge increased in key geriatric topics. Student feedback allows for continuous improvement of the curriculum. This model of curricular innovation may be useful for other institutions seeking to develop or enhance geriatric medicine content in the medical school curriculum.

Attitude of Health Personnel↗

PubMed1994

Self management practices in adult asthmatics.

AIM: To examine how adherence to medications and use of competencies (eg, avoiding personal precipitants and managing an acute attack) vary by age, sex, education and number of symptoms in a sample of adult asthmatics. METHODS: 412 adult asthmatics, members of two asthma societies, participated in a mailed survey. The questionnaire contained measures of asthma medication adherence, asthma health competencies, asthma symptoms, and demographic characteristics. RESULTS: Older asthmatics were more likely to adhere and to use more competencies. Females used more competencies than males. Asthmatics with higher numbers of symptoms used more competencies. No differences were found by educational level. CONCLUSIONS: Better adherence in older asthmatics may be due to their having developed greater recognition of the efficacy of medications. The more extensive use of competencies by older people and by women reflects previous findings that these groups value health more and engage in less health threatening behaviours in general. The results also suggest that experiencing asthma symptoms motivates better self management practices. The study raises awareness of the role of competencies in controlling asthma, and should assist health professionals to identify specific differences in self management.

Adult↗

PubMed1994