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International audience; We introduce a photoreactive polyethylene (PE) derivative, which upon light irradiation (lambda(max) = 365 nm) can effectively react to form well-defined block copolymers with polystyrene and poly(methyl methacrylate). The herein introduced synthetic technology provides challenging-to-access polyethylene architectures based on a rapid and catalyst free photochemical ligation concept.

Background There have been several reports of congenital malformations in the offspring of mothers who took valproic acid (VPA) during pregnancy as a treatment for epilepsy. Methods Herein, we describe four cases with typically similar facial features of fetal valproate syndrome accompanied to minor skeletal abnormalities. Results The first case was a 16-month-old girl, presenting with facial dysmorphism, and finger abnormalities. Her mother took VPA (1500 mg/d) up to the 10 th gestational week and at a dosage of 1000 mg/d through the pregnancy. The second patient was 5-year-old boy with speech disability, bilateral cryptorchidism, facial dysmorphism, and finger abnormalities whose mother took VPA (1000 mg/d) through pregnancy. The third 19-month-old patient was the brother of the second patient who had facial dysmorphism, bilateral cryptorchidism, and finger abnormalities. His mother also took VPA (1000 mg/d) through pregnancy. The fourth 3-year and 6 month-old boy with minor facial dysmorphism and sternum deformity was exposed to VPA (500 mg/d) in utero . Conclusion In conclusion, there is a recognizable spectrum of abnormalities in some infants exposed to VPA without dose-depence and the common facial dysmorphic features and minor skeletal abnormalities that may occur within the both low and high dose VPA use.

Sendromik obezite farklı gen ya da kromozom bozukluklarıyla ortaya çıkar. Obeziteye dismorfik bulgular, mental retardasyon ve gelişimsel anomaliler eşlik eder. Prader-Willi sendromu, Bardet-Biedl sendromu ve Alström sendromu klinik pratikte en sık karşılaşılan obezite sendromlarıdır. Prader-Willi sendromu hipotoni, hiperfaji, hipogonadizm ve boy kısalığı ile karakterize genomik imprinting hatasından kaynaklanan bir obezite sendromudur. Bardet-Biedl sendromu retinal distrofi, trunkal obezite, postaksiyel polidaktili, öğrenme güçlüğü, renal anomaliler ve erkeklerde hipogonadotropik hipogonadizm ile karakterize otozomal resesif geçişli, genetik olarak heterojen bir siliopati sendromudur. Alström sendromu ilerleyici kon-rod distrofisine, obezite ve sensörinöral işitme kaybının eşlik ettiği çoklu organ tutulumu ile karakterize, otozomal resesif geçişli bir sendromdur. Ekzojenik ve monojenik obezitelerin dışlandığı durumlarda sendromik obeziteye yaklaşırken hormonal değerlendirmenin yanında hasta ek dismorfik özellikleri, oftalmolojik, dental, kardiyak, renal, nörolojik sistem yönünden de değerlendirilmelidir. Tanının doğrulanması ve aileye genetik danışmanlık hizmeti verilebilmesi için genetik tanı yöntemlerinden yararlanılmalıdır, Syndromic obesity occurs with different genetic or chromosomal disorders. Obesity is accompanied by dysmorphic features, mental retardation and developmental abnormalities. Prader-Willi syndrome, Bardet-Biedl syndrome and Alström syndrome are the most commonly encountered obesity syndromes, in clinical practice. Prader-Willi syndrome is an obesity syndrome, characterized by hypotonia, hyperphagia, hypogonadism and short stature due to genomic imprinting defect. Bardet-Biedl syndrome is a genetically heterogeneous ciliopathy syndrome caused by autosomal recessive genes, characterized by retinal dystrophy, truncal obesity, postaxial polydactyly, learning difficulties, renal anomalies, and hypogonadotropic hypogonadism only in males, Alström syndrome is an autosomal recessive syndrome, characterized by progressive cone-rod dystrophy, obesity and sensorineural hearing loss accompanied by multi-organ involvement. If exogenous and monogenic obesity is excluded, not only hormonal evaluation but also additional dysmorphic features, ophthalmic, dental, cardiac, renal, and neurological systems should also be evaluated to approach syndromic obesity. Genetic diagnostic analysis should be utilized for confirming the diagnosis and providing genetic counseling to families

Moebius sendromu, diğer adıyla Moebius sekansı, doğuştan yüz ve göz sinirlerinde felç ile belirgin, ilerleyici olmayan bir kraniyal disinnervasyon bozukluğudur. Emmede zayıflık ve yüz felci nedeniyle izlenen, in vitro dölleme ile oluşan gebelik sonucu doğan, beş günlük kız hastaya iki taraflı pitoz ve dışa bakış kısıtlılığı, dilde sola kayma, dismorfik yüz görünümü, sol el parmak ve tırnaklarında hipoplazi bulguları ile birlikte Moebius sendromu tanısı konuldu. Bu sendroma üç, dört, beş, dokuz, 10 ve 12 gibi ek kraniyal sinir tutulumu, kol ve bacak gelişim anomalileri de eşlik edebilir. Etiolojide bir çok etmen öne sürülmekle beraber yardımcı üreme tekniklerine bağlı nadir olgular bildirilmiştir. Hastalarda beslenme güçlüğü ve aspirasyon sorunları süt çocukluğu döneminde karşılaşılan başlıca sorunlardır. Yüz felci ile doğan yenidoğan diğer kraniyal sinirler bakımından da ayrıntılı muayene edilmeli, ayırıcı tanıda Moebius sendromu ile birlikte diğer kraniyal disinnervasyon bozuklukları göz önünde bulundurulmalıdır., Möbius' syndrome, also known as Möbius' sequence, is a nonprogressive cranial dysinnervation disorder characterized by congenital facial and abducens nerve paralysis. Here, we report a 5-day-old girl who was conceived after in vitro fertilization with poor suck and facial paralysis. She had bilaterally ptosis and lateral gaze limitation, left-sided deviation of the tongue, dysmorphic face, hypoplastic fingers and finger nails on the left hand, and was diagnosed as having Möbius' syndrome. Involvement of other cranial nerves such as three, four, five, nine, 9 and 12, and limb malformations may accompany this syndrome. However, several factors have been proposed for the etiology, some rare cases have also been reported with artificial reproductive technologies. Feeding difficulties and aspiration are the main problems encountered in infancy. The other cranial nerves should be examined further in newborns who present with congenital facial palsy, and other cranial dysinnervation disorders should be considered in the differential diagnosis.