Anti-TMLHE (aa 115-367) polyclonal antibody

Duplications involving terminal Xq28 are a known cause of intellectual disability (ID) in males and in females with unfavorable X-inactivation patterns. Within Xq28, functional disomy of MECP2 causes a severe ID syndrome, however the dosage sensitivity of other Xq28 duplicated genes is less certain. Duplications involving the int22h-1/int22h-2 LCR-flanked region in distal Xq28 have recently been linked to a novel ID-associated phenotype. While evidence for the dosage sensitivity of this region is emerging, the phenotypic contribution of individual genes within the int22h-1/int22h-2-flanked region has yet to be determined. We report a familial case of a novel 774kb Xq28-qter duplication, detected by cytogenomic microarray analysis, that partially overlaps the int22h-1/int22h-2-flanked region. This duplication and a 570kb Xpter-p22.33 loss within the pseudoautosomal region were identified in three siblings, one female and two males, who presented with developmental delays/intellectual disability, mild dysmorphic features and short stature. Although unconfirmed, these results are suggestive of maternal inheritance of a recombinant X. We compare our clinical findings to patients with int22h-1/int22h-2-mediated duplications and discuss the potential pathogenicity of genes within the duplicated region, including those within the shared region of overlap, RAB39B and CLIC2. (c) 2014 Wiley Periodicals, Inc.

Carnitine is a hydrophilic quaternary amine that plays a number of essential roles in metabolism with the main function being the transport of long-chain fatty acids from the cytosol to the mitochondrial matrix for beta-oxidation. Camitine can be endogenously synthesized. However, only a small fraction of camitine is obtained endogenously while the majority is obtained from diet, mainly animal products. Carnitine is not metabolized and is excreted in urine. Carnitine homeostasis is regulated by efficient renal reabsorption that maintains camitine levels within the normal range despite variabilities in dietary intake. Diseases occurring due to primary defects in camitine metabolism and homeostasis are comprised in two groups: disorders of carnitine biosynthesis and carnitine transport defect. While the hallmark of carnitine transport defect is profound carnitine depletion, disorders of carnitine biosynthesis do not cause carnitine deficiency due to the fact that both carnitine obtained from diet and efficient renal camitine reabsorption can maintain normal carnitine levels with the absence of endogenously synthesized carnitine. Camitine transport defect phenotype encompasses a broad clinical spectrum including metabolic decompensation in infancy, cardiomyopathy in childhood, fatigability in adulthood, or absence of symptoms. The phenotypes associated with the camitine transport defect result from the unavailability of enough carnitine to perform its functions particularly in fatty acid beta-oxidation. Camitine biosynthetic defects have been recently described and the phenotypic consequences of these defects are still emerging. Although these defects do not result in camitine deficiency, they still could be associated with pathological phenotypes due to excess or deficiency of intermediate metabolites in the carnitine biosynthetic pathway and potential carnitine deficiency in early stages of life when brain and other organs develop. In addition to these two groups of primary carnitine defects, several metabolic diseases and medical conditions can result in excessive carnitine loss leading to a secondary camitine deficiency. (C) 2015 Elsevier Inc. All rights reserved.