Rival and Zaguia showed that the antichain cutsets of a finite Boolean lattice are exactly the level sets. We show that a similar characterization of antichain cutsets holds for any strongly connected poset of locally finite height. As a corollary, we characterize the antichain cutsets in semimodular lattices, supersolvable lattices, Bruhat orders, locally shellable lattices, and many more. We ...

A block negacyclic Bush-type Hadamard matrix of order 36 is used in a symmetric BGW(26, 25, 24) with zero diagonal over a cyclic group of order 12 to construct a twin strongly regular graph with parameters v=936, k=375, l=m=150 whose points can be partitioned in 26 cocliques of size 36. The same Hadamard matrix then is used in a symmetric BGW(50, 49, 48) with zero diagonal over a cyclic group o...

We construct two-intersection sets in PG(5, q), q odd, admitting PSL(2, q), whose associated strongly regular graphs have the same parameters as, but are not isomorphic to, Paley graphs.

Article history: Received 1 October 2012 Received in revised form 9 February 2015 Accepted 10 February 2015 Available online 14 February 2015

PURPOSE The purpose of the present study was to determine the role of the tumor necrosis factor alpha (TNF-alpha) gene polymorphism G-308A and total serum immunoglobulin E (TsIgE) levels in the onset of pseudoexfoliation glaucoma (PEXG) in Pakistani patients. METHODS The TNF-alpha polymorphism G-308A was analyzed in 122 patients with PEXG and 126 healthy unrelated controls by using polymerase...

The inhibitory effect of lipopolysaccharides (LPS) on contraction evoked by alpha-adrenergic stimulation is quite well-known, but molecular mechanism of this inhibition is unclear. In the present study, an interaction between alpha-adrenoceptor response and LPS in rat tail artery was investigated using chemical stimulation. In the presence of LPS noradrenaline and phenylephrine, concentration-r...

Cytokines appear to play an important role in the development and progression of epithelial tumors. Cultured normal human thyroid follicular cells constitutively release high levels of interleukin-6 (IL-6) and IL-8, together with low to moderate levels of transforming growth factor-alpha (TGF-alpha) and TGF-beta. IL-6 appears to play multiple functions in thyroid physiology and disease. Because...

IL-18 is a proinflammatory cytokine that enhances innate and specific Th1 immune responses. During microbial infections, IL-18 is produced by activated macrophages. IL-18 exerts its effects in synergy with IFN-alpha or IL-12 to induce IFN-gamma. Here we show that in human NK and T cells IFN-alpha and IL-12 strongly up-regulate mRNA expression of the IL-18R components, accessory protein-like (Ac...