Vertebrobasilar circulation hemorrhages in childhood primary angiitis of the central nervous system.

Childhood primary angiitis of the CNS (cPACNS) is a poorly understood, rare, and diagnostically challenging neurologic disease. We describe an unusual and autopsy-confirmed case of cPACNS presenting as vertebrobasilar circulation hemorrhagic strokes in a 4-year-old girl. The presentation and clinical features were inconsistent with primary CNS vasculitis and skewed the diagnosis. Autopsy and histopathological analyses revealed a progressive lymphocytic vasculitis affecting the medium to large vessels of vertebrobasilar circulation and sparing the anterior circulation. It is imperative to raise the index of suspicion for cPACNS in any case of unusual or unexplained neurological presentation, especially in the absence of cerebrovascular risk factors and/or coagulation disorders.

Vertebrobasilar circulation hemorrhages in childhood primary angiitis of the central nervous system

ABSTRACT Childhood primary angiitis of the CNS (cPACNS) is a poorly understood, rare, and diagnostically challenging neurologic disease. We describe an unusual and autopsy-confirmed case of cPACNS presenting as vertebrobasilar circulation hemorrhagic strokes in a 4-year-old girl. The presentation and clinical features were inconsistent with primary CNS vasculitis and skewed the diagnosis. Autopsy and histopathological analyses revealed a progressive lymphocytic vasculitis affecting the medium to large vessels of vertebrobasilar circulation and sparing the anterior circulation. It is imperative to raise the index of suspicion for cPACNS in any case of unusual or unexplained neurological presentation, especially in the absence of cerebrovascular risk factors and/or coagulation disorders.

Effects of Host Species Identity and Diet on the Biodiversity of the Microbiota in Puerto Rican Bats.

Microbiota perform vital functions for their mammalian hosts, making them potential drivers of host evolution. Understanding effects of environmental factors and host characteristics on the composition and biodiversity of the microbiota may provide novel insights into the origin and maintenance of these symbiotic relationships. Our goals were to (1) characterize biodiversity of oral and rectal microbiota in bats from Puerto Rico; and (2) determine the effects of geographic location and host characteristics on that biodiversity. We collected bats and their microbiota from three sites, and used four metrics (species richness, Shannon diversity, Camargo evenness, Berger-Parker dominance) to characterize biodiversity. We quantified the relative importance of site, host sex, host species-identity, and host foraging-guild on biodiversity of the microbiota. Microbe biodiversity was highly variable among conspecifics. Geographical location exhibited consistent effects, whereas host sex did not. Within each host guild, host species exhibited consistent differences in biodiversity of oral microbiota and of rectal microbiota. Oral microbe biodiversity was indistinguishable between guilds, whereas rectal microbe biodiversity was significantly greater in carnivores than in herbivores. The high intraspecific and spatial variation in microbe biodiversity necessitate a relatively large number of samples to statistically isolate the effects of environmental or host characteristics on the microbiota. Species-specific biodiversity of oral microbiota suggests these communities are structured by direct interactions with the host immune system via epithelial receptors. In contrast, the number of microbial taxa that a host gut supports may be driven by host diet-diversity or composition.

Synthesis of some novel pyrimidine, thiophene, coumarin, pyridine and pyrrole derivatives and their biological evaluation as analgesic, antipyretic and anti-inflammatory agents

Pyrimidine derivative 3 was afforded through the reaction of compound (1) with 5-ureidohydantion (2). Product 3 underwent a cyclization to produce fused pyrimidine derivative 7, although the latter product 7 was synthesized through one step via the reaction of compound (1) with 5-ureidohydantion (2) using another catalyst. Compound 3 was oriented to react with cyclic ketones 8a,b in the presence of elemental sulfur, salicylaldehyde (10), aryldiazonium chlorides 12a,b and ω-bromo-4-methoxy- acetophenone (14), which afforded, fused thiophene derivatives 9a,b, coumarin derivative 11, arylhdrazono derivatives 13a,b and 4-methoxyphenyl butenyl derivative 15, respectively. The latter product 15 was reacted with either potassium cyanide (16a) or potassium thiocyanide (16b) to form cyano and thiocyano derivatives 17a,b, respectively. Compound 17a underwent further cyclization to afford pyridopyrimidine derivative 19. Compound 15 was reacted with either hydrazine (20a) or phenylhydrazine (20b) to produce hydrazo derivatives 21a,b and these products were cyclize to produce pyrrole derivatives 23a,b. Finally, 5-ureidohydantion (2) was reacted with compounds 24a,b,c to afford pyrimidine derivatives 25a,b,c. The structures of the synthesized compounds were confirmed using IR, 1H NMR, 13C NMR and mass spectrometry techniques. Compounds 11 and 19 have promising as analgesic and antipyretic activities