Recent Advances in the Polish Research on Polysaccharide-Based Nanoparticles in the Context of Various Administration Routes.

Polysaccharides are the most abundant polymers in nature. They exhibit robust biocompatibility, reliable non-toxicity, and biodegradable character; thus, they are employed in multiple biomedical applications. The presence of chemically accessible functional groups on the backbone of biopolymers (amine, carboxyl, hydroxyl, etc.

Coexistence of bilateral macular edema and pale optic disc in the patient with Cohen syndrome.

Background: Cohen syndrome (Q87.8;ORPHA:193; OMIM#216550) is an autosomal recessive inherited genetic disorder caused by mutation in the gene. It is characterized by variable clinical symptoms such as deformity of the head, face, hands and feet, eye abnormalities, abdominal obesity, neutropenia and nonprogressive intellectual disability.

Variable degree of mosaicism for tetrasomy 18p in phenotypically discordant monozygotic twins-Diagnostic implications.

Background: Phenotypically discordant monozygotic twins (PDMZTs) offer a unique opportunity to study post-zygotic genetic variation and provide insights into the linkage between genotype and phenotype. We report a comprehensive analysis of a pair of PDMZTs.

Methods: Dysmorphic features and delayed neuro-motor development were observed in the proband, whereas her twin sister was phenotypically normal.

Diverse clinical outcome of Hunter syndrome in patients with chromosomal aberration encompassing entire and partial IDS deletions: what is important for early diagnosis and counseling?

Our study aims to delineate the syndromology of Hunter syndrome (MPSII), by presenting three patients with different clinical courses, caused by different genetic mechanisms. Single-nucleotide variants (SNV) or small deletions encompassing the iduronate-2-sulfatase (IDS) gene are identified in the majority of affected individuals, while deletion of contiguous genes or whole IDS gene (described herein) has been reported rarely, mainly in patients with a severe Hunter syndrome presentation. There is; however, lack of reliable genotype-phenotype correlation, especially regarding anthropometric parameters, and thus our understanding of MPSII pathophysiology is not complete.

Chemoenzymatic synthesis of enantiomerically enriched diprophylline and xanthinol nicotinate.

A concise chemoenzymatic route toward enantiomerically enriched active pharmaceutical ingredients (API) - diprophylline and xanthinol nicotinate - is reported for the first time. The decisive step is an enantioselective lipase-mediated methanolysis of racemic chlorohydrin-synthon acetate, namely 1-chloro-3-(1,3-dimethyl-2,6-dioxo-1,2,3,6-tetrahydro-7H-purin-7-yl)propan-2-yl acetate, performed under kinetically-controlled conditions on a preparative 500 mg-scale. The best results in terms of reaction enantioselectivity (E = 14) were obtained for the enantiomers resolution performed with lipase type B from Candida antarctica immobilized on acrylic resin (CAL-B, Novozym 435) suspended in homophasic acetonitrile-methanol mixture.