Biomedical subjects

Michael Burnet

Publications and source records attributed to Michael Burnet.

5 recordsLinked to original sources

PubMed2005

Lesional accumulation of P2X4 receptor+ monocytes following experimental traumatic brain injury.

P2X4 receptor (P2X4R) is an ATP-gated ion channel. ATP is an important messenger in traumatic brain injury. Here, we report expression of P2X4R in rat traumatic brain injury with focus on the early phase, most amenable to therapy. Accumulation of P2X4R+ cells was observed as early as 6 h after injury and continued to increase 4 days post-injury at the lesion and remote areas. Double staining revealed that most P2X4R+ cells co-expressed ED-1, a marker for reactive microglia/macrophages, but not nestin or W3/13. Our data suggest that P2X4R expression defines a subtype of activated microglia/macrophages involved in the early processes following traumatic brain injury.

Animals↗

PubMed2005

CC-10004 .

CC-10004, a phosphodiesterase 4 inhibitor and selective cytokine inhibitor, is under development by Celgene for the potential treatment of asthma, chronic obstructive pulmonary disease, inflammation and psoriasis. By October 2004, phase II trials in psoriasis had commenced.

3',5'-Cyclic-AMP Phosphodiesterases↗

PubMed2005

AWD-12-281 (inhaled) (elbion/GlaxoSmithKline).

elbion (formerly ASTA Medica) and GlaxoSmithKline are developing an inhaled formulation of AWD-12-281 for the potential treatment of chronic obstructive pulmonary disease (COPD). By May 2005, phase II trials of this 5-hydroxyindole PDE4 inhibitor for COPD were ongoing.

3',5'-Cyclic-AMP Phosphodiesterases↗

PubMed2005

CDNA-microarray analysis as a research tool for expression profiling in human peripheral blood following exercise.

Exhausting endurance exercise has strong effects on the immune system. Changes have been shown in the cellular composition of peripheral blood and in gene expression within those cells. In this study, custom-made cDNA microarrays focused on inflammation were used to analyze gene expression blood cells obtained from eight half-marathon runners before (t0), immediately after (t1) and 24 hours after exercise (t2). The microarrays that were used contained 384 different cDNAs spotted in triplicate. Differentially-regulated gene expression was analyzed using a simple rule-based clustering. Comparing t1 vs. t0, and t2 vs. t0, 36 and 21 sequences respectively, showed a consistent pattern of changes in all eight athletes. Taken together, the pattern of these modified genes can be viewed as a "gene expression fingerprint" for each time point in response to a half marathon. The known and novel genes identified here represent targets for further molecular characterization of the complex reaction of the body to an exhaustive challenge. These data suggest that gene expression fingerprints can serve as a powerful research tool to design novel strategies for diagnosis and treatment of exercise related injury and stress.

Adult↗

PubMed2002

Expression pattern in the antennae of a newly isolated lepidopteran Gq protein alpha subunit cDNA.

From the antennae of the moth Mamestra brassicae, we have identified a lepidopteran G protein alpha subunit belonging to the Gq family, through immunological detection in crude antennal extract and antennal primary cell cultures, followed by molecular cloning. The complete cDNA sequence (1540 bp) contains an open reading frame encoding a protein of 353 amino acids. This deduced sequence possesses all of the characteristics of the Gq family and shares a very high degree of amino-acid sequence identity with vertebrate (80% with mouse or human Gqalpha) and invertebrate subunits (varying between 60 and 87% for Gqalpha from organisms as diverse as sponge and Drosophila). The expression pattern of the Gq subunit in adult antennae was associated with the olfactory sensilla suggesting a specific role in olfaction. These data provide molecular evidence for a component of the phosphoinositide signaling pathway in moth antennae: this G protein alpha subunit may be involved in the olfaction transduction process through interaction with G-protein-coupled receptors, stimulating the phospholipase C mediated second messenger pathway.

Amino Acid Sequence↗