In social animals, group efficiency is often assumed to increase with task differentiation, but this requires that individuals are better than generalists at the task they specialize in. A new study finds that individual Anelosimus studiosus spiders do predominantly perform the task they excel at, in line with their individual personality type, when they are placed in groups.

tosus. Ann Rheum Dis 2005;64:947–50. 9. Arnett FC, Edworthy SM, Bloch DA et al. The American Rheumatism Association 1987 revised criteria for the classification of rheumatoid arthritis. Arthritis Rheum 1988;31:315–24. 10. Svensson B, Schaufelberger C, Teleman A, Theander J. Remission and response to early treatment of RA assessed by the Disease Activity Score. BARFOT study group. Better Anti-rh...

objective(s):  apoptosis is a tightly regulated process and plays a crucial role in autoimmune diseases. because abnormalities in apoptosis are considered to be involved in the pathogenesis of systemic lupus erythematosus (sle), in present study we studied the apoptosis in t lymphocytes from iranian sle patientsat protein and gene expression levels for some molecules which are involved in apopt...

The evolution of sociality remains a challenge in evolutionary biology and a central question is whether association between kin is a critical factor favouring the evolution of cooperation. This study examines genetic structure of Anelosimus studiosus, a spider exhibiting polymorphic social behaviour. Two phenotypes have been identified: an 'asocial' phenotype with solitary female nests and a '...

objective(s):genetic and environmental factors are involved in the pathogenesis of systemic lupus erythematosus (sle). autoreactive lymphocytes are cleared through apoptosis and any disturbance in the apoptosis or clearance of apoptotic cells may disturb tolerance and lead to autoimmunity. vitamin d has anti-proliferative effects and controls cell cycle progression. in this study we investigate...

The yG-globulin eluted at acid pH from kidney cortex homogenates and isolated glomeruli of five of six patients with lupus nephritis was found to exhibit antinuclear activity, which was not dependent on presence of fresh human serum. Specificity, as demonstrated by absorption of antinuclear activity, was related to nucleoprotein in three glomerular acid eluates and to DNA in two acid eluates as...

panniculitis. Result: The most common clinical manifestation was a depressed patch on upper arm. There was 46oh and l3o/o positivity in the ANA and anti-ds DNA test, respectively. His topatho log ica l ly , a l l spec imens revealed lobu lar panniculitis and the majority of cases presented epidermal atrophy and dermal infiltration. Immunohistochemistry showed a predominance of T lymphocytes. Al...

during 1999-2002, in the course of a faunistic survey of oribatid mites of iran, twelve species of higher or brachypyline oribatid mites (brachypylina) belonging to eleven gen-era and seven families from various localities of iran were collected: aleurodamaeus* se-tosus (aleurodamaeidae*); licnobelba* alestensis (licnobelbidae*); licnodamaeus fissu-ratus, l. pulcherrimus (licnodamaeidae); damae...

Patients with systemic lupus erythematosus (SLE) often display clearance deficiencies for various targets like apoptotic cells. Most of the in vitro phagocytosis assays have been performed with leukocyte preparations from patients with SLE and may, therefore, be influenced by immunosuppressive drugs. We isolated circulating hematopoietic stem cells from patients with SLE to generate adherent ce...