The contribution of soluble activities to intravascular nucleotide homeostasis remains controversial. By using thin-layer chromatographic assays, we revealed transphosphorylation of [gamma-P-32]ATP and AMP by human and murine sera, which was progressively inhibited by specific adenylate kinase (AK) inhibitor Ap(5)A. This phosphotransfer reaction was diminished markedly AR-13324 in serum from knockout mice lacking the major AK isoform, AK1, and in

human serum immunodepleted of AK1. We also showed that similar to 75% ADP in cell-free serum is metabolized via reversible AK1 reaction 2ADP <-> ATP + AMP. The generated ATP and AMP are then metabolized through the coupled nucleotide pyrophosphatase/phosphodiesterase and 5′-nucleotidase/CD73 reactions, respectively. Constitutive presence of another nucleotide-converting enzyme, nucleoside triphosphate diphosphohydrolase-1 (NTPDase1, known as CD39), was ascertained by the relative deficiency of serum from CD39-null mice to dephosphorylate [H-3]ADP and [gamma-P-32]ATP,

and also by diminished [H-3]ADP hydrolysis by human serum pretreated with NTPDase1 inhibitors, POM-1 and ARL-67156. In summary, we have identified hitherto unrecognized soluble forms of AK1 and NTPDase1/CD39 that contribute in the active cycling between the principal platelet-recruiting agent ADP and other circulating nucleotides.-Yegutkin, G. G., Wieringa, B., Robson, S. C., Jalkanen, S. Metabolism of circulating ADP in the bloodstream Small molecule library high throughput is mediated via integrated actions of soluble adenylate kinase-1 and NTPDase1/CD39 activities FASEB J. 26, 3875-3883 (2012). www.fasebj.org”
“When

13 of 13 nasal wash specimens from a single pediatrician’s office tested positive for low quantities of Bordetella pertussis DNA, we suspected prelaboratory contamination. Investigation revealed that Pentacel and Adacel vaccines contain high copy numbers of B. pertussis DNA, which can be aerosolized, causing false-positive B. pertussis PCR results.”
“The present study was conducted to understand the microalgal dynamics and surveillance in the selective sites along the south east coast of India. Algal isolation was carried out in 61 sampling stations characterized by different ecological features. see more In total 10 microalgal species were isolated under laboratory condition from the collected samples. The composition of microalgal distribution and their surveillance were related to the environmental factors are discussed in the present paper. From the results it was observed that Isochrysis galbana [MA1] has the maximum surveillance at 37 spots [60.7%]. It was also observed that 25.7% of the collection spots may share same microalgal dynamics and surveillance. In order to understand the better background information about the importance of culture condition in the optimal growth of microalgal strains, experimental setup were designed using modified Walne’s and Guillard f/2 medium.