Search Results - (Author, Cooperation:W. Koh)

2018-09-21

American Society of Hematology (ASH)

0006-4971

1528-0020

Biology

Medicine

Lymphoid Neoplasia

2013-07-28

American Association for the Advancement of Science (AAAS)

0036-8075

1095-9203

Biology

Chemistry and Pharmacology

Computer Science

Medicine

Natural Sciences in General

Physics

Alleles ; Animals ; *Genes ; Genome ; Genotype ; Histocompatibility/*genetics ; Immune Tolerance ; Molecular Sequence Data ; Sequence Analysis, DNA ; Transcriptome ; Up-Regulation ; Urochordata/*genetics/*immunology/physiology

2018-06-27

The American Society for Microbiology (ASM)

0066-4804

1098-6596

Biology

Medicine

2018-02-23

BMJ Publishing Group

0022-2593

1468-6244

Medicine

0278-4165

Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Archaeology

Biology

Electronic Resource

1432-0738

Key words AAF ; Immunosuppression ; Cell cycle

Springer Online Journal Archives 1860-2000

Medicine

Abstract  2-Acetylaminofluorene (AAF) inhibited in a dose dependent manner mouse spleen cell blastogene sis in response to phorbol 12-myristate 13-acetate (PMA)/Ionomycin (Io) activation, the T-cell lectin, concanavalin A (Con A), and following stimulation by alloantigens as measured by the mixed lymphocyte response (MLR). AAF also markedly suppressed the T-cell dependent antibody forming cell (AFC) response to sRBC. AAF was most inhibitory on both the sRBC IgM AFC response and Con A stimulated proliferation when added during the first 24 h following initiation of culture. Direct addition of high concentrations of AAF (100 μM) to spleen cell cultures at 48 h following Con A stimulation produced a very modest inhibition (〈20%) of T-cell proliferation as compared to 90% when added at the time cultures were initiated. Similarly, AAF (75 and 100 μM) produced a greater than 80% inhibition of the in vitro AFC response when spleen cells were sensitized with antigen in presence of AAF. In contrast, no inhibition of the IgM AFC response was produced when AAF (75 μM) was added to spleen cell cultures 48 or 72 h after antigen sensitization. Con A-triggered cell-cycle progression was attenuated at the G1 stage by the addition of AAF (50 and 100 μM) with no inhibition of S to G2/M phase transition. These results suggest that the mechanism of AAF-mediated immune suppression is through a blockade of cell cycle progression from G1 to S phase.

Electronic Resource

1432-203X

Keywords Rapid-cycling ; Brassica napus ; Somatic embryogenesis ; Secondary embryogenesis ; Regeneration ; In vitro Howering ; AbbreviationsABA: Abscisic acid ; BAP: 6-Benzyl-aminopurine ; DAP: Days after pollination ; 2-iP: 6-(γ, γ-dimethlyallyl-amino)purine ; Kinetin: 6-Furfurylaminopurine ; MS: Murashige and Skoog ; SE0: Somatic embryo from seed ; SE1: First-generation secondary embryo ; SE2: Second-generation secondary embryo ; Zeatin: 6-(4-hydroxy-3-methylbut-trans-2-enylamino)purine

Springer Online Journal Archives 1860-2000

Biology

Abstract  A simple method to induce somatic embryogenesis from seeds of rapid-cycling Brassica napus is described. Seedlings cultured on Murashige and Skoog (MS) basal medium produced somatic embryos directly on hypocotyls and cotyledons after 2 to 3 subcultures onto the same medium. A low pH of the medium (3.5–5) was more conducive to somatic embryogenesis than a higher pH (6 and 7). Embryogenic potential of the seeds was inversely correlated to seed age: about 41–68% of immature seeds between the ages of 14 and 28 days after pollination (DAP) formed somatic embryos compared to 0–11% of the seeds obtained 29–37 DAP. About 54% of the somatic embryos produced secondary embryos after subculturing onto the same medium. The embryogenic potential of the cultures has been maintained on MS basal medium for 2 years (12 generations) without diminution. Up to 75% of the secondary embryos developed into plantlets on MS medium enriched with 10–6  M zeatin, and 40% of these produced flowers when transferred to an optimised flower-induction medium. Viable seeds were produced in self-pollinated in vitro flowers.

Electronic Resource

1434-9949

Cervical Spine Surgery ; Ankylosing Spondylitis ; Outcome

Springer Online Journal Archives 1860-2000

Medicine

Summary Objective. To assess retrospectively, the outcome of cervical spine surgery in patients with ankylosing spondylitis (AS). Methods. A cross-sectional study of 3464 patients with identified AS, 19 patients of whom had cervical spine surgery. A self-administered questionnaire (including the use of 10 cm visual analogue scales, 0=none, 10=worst) assessing the complications of the surgery, patients' neck symptoms and post-surgery functional ability was sent to the 19 patients. Available casenotes and radiographs were reviewed. Results. The mean duration of follow-up was 10 years. One patient had two separate cervical spine operations. The types of surgery performed included cervical fusion (n=7), osteotomy (n=7) and laminectomy (n=6). Six patients had minor complications as a result of surgery. The majority of patients (93%) felt that their surgery had been successful. Most patients (81%) had a reduction in neck pain (mean pain score=3.1, SD 2.8) but increased neck stiffness (mean stiffness score=8.0, SD 2.9). Postoperative radiographs of 7 patients showed complete ankylosis of the cervical spine. Generally, few patients reported difficulty with reading/watching television (6%), sleep (19%) or driving (36%). A third of the patients were still in full time employment. Conclusions. About 1 in 200 patients with AS undergo cervical spine surgery. The surgery is often successful and complications are usually minor. Neck pain is often better after surgery and any remaining neck symptoms do not significantly affect the patient's sleep or functional activities. In this retrospective study, the long term outcome of cervical spine surgery in patients with AS appears to be good.

Electronic Resource