Notes

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 The acylcarnitine profile is analyzed in dried blood spots (DBS) to screen for inborn errors of metabolism. Hematocrit (Ht) is known to affect the result of quantitative analyses of DBS samples; however, the effects of Ht on the acylcarnitine profiles in DBS have not been studied in actual samples from newborns.

 The acylcarnitine profiles in DBS for newborn screening tests and Ht levels of very-low-birth-weight infants were obtained from medical records. We investigated the relationship between Ht and each acylcarnitine using Pearson's correlation coefficient (r).

 We examined 77 newborns in this study. There was a significantly positive correlation between Ht and C0, C2, C12, C16, C18, C181, and C181-OH, respectively (
 < 0.0025). The correlation was the greatest on C2 (
 = 0.59).

 This study clarifies that Ht and C0, C2, C12, C16, C18, C181, and C181-OH are significantly correlated in DBS, which is consistent with previous studies. Hence, the effect of Ht should be considered when interpreting the results of acylcarnitine profiles in DBS.

· Acylcarnitine profile in dried blood spots (DBS) is affected by the hematocrit (Ht) of the sample.. · There are positive correlations between Ht and C0, C2, C12, C16, C18, and C181-OH in DBS.. · We should be aware of the effects of Ht on acylcarnitine profiles in DBS..
· Acylcarnitine profile in dried blood spots (DBS) is affected by the hematocrit (Ht) of the sample.. · There are positive correlations between Ht and C0, C2, C12, C16, C18, and C181-OH in DBS.. · We should be aware of the effects of Ht on acylcarnitine profiles in DBS..Vascular calcification is a prognostic marker for cardiovascular mortality in chronic kidney disease (CKD) patients. In these patients, magnesium balance is disturbed, mainly due to limited ultrafiltration of this mineral, changes in dietary intake and the use of diuretics. Observational studies in dialysis patients report that a higher blood magnesium concentration is associated with reduced risk to develop vascular calcification. Magnesium prevents osteogenic vascular smooth muscle cell transdifferentiation in in vitro and in vivo models. In addition, recent studies show that magnesium prevents calciprotein particle maturation, which may be the mechanism underlying the anti-calcification properties of magnesium. Magnesium is an essential protective factor in the calcification milieu, which helps to restore the mineral-buffering system that is overwhelmed by phosphate in CKD patients. The recognition that magnesium is a modifier of calciprotein particle maturation and mineralization of the extracellular matrix renders it a promising novel clinical tool to treat vascular calcification in CKD. Consequently, the optimal serum magnesium concentration for patients with CKD may be higher than in the general population.Plasma exchange (PLEX) is capable of removing significant amounts of circulating antibodies. In anti-neutrophil cytoplasmic antibody-associated vasculitis, PLEX was reserved for patients with severe presentation forms such as rapidly progressive glomerulonephritis and pulmonary haemorrhage. The Plasma Exchange and Glucocorticoids in Severe ANCA-Associated Vasculitis (PEXIVAS) trial included all comers with a glomerular filtration rate less then 50 mL/min/1.73 m2 and thus aimed to answer the question of whether PLEX is an option for patients with no relevant kidney function impairment or not. PEXIVAS revealed that after a follow-up of almost 3 years, routine administration of PLEX does not provide an additional benefit to reduce the rate of a composite comprising end-stage kidney disease or death. In the absence of histological parameters, it is tempting to speculate whether PLEX is effective or not in those with a potential for renal recovery. A subset of patients presented with alveolar haemorrhage, and there was a trend towards a better outcome of such cases receiving PLEX. This would be in line with observational studies reporting a recovery of alveolar haemorrhage following extracorporeal treatment. In this PRO part of the debate, we highlight the shortcomings of the PEXIVAS trial and stimulate further research paths, which in our eyes are necessary before abandoning PLEX from the therapeutic armamentarium.Advances in the diagnosis and treatment of anti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitis have led to continued improvement in survival and prognosis over the course of the last 4 decades. Nevertheless, the most acute and severe disease manifestations, including severe kidney disease and alveolar hemorrhage, continue to be associated with increased early mortality from disease activity or treatment complications as well as risk for the development of end-stage kidney disease (ESKD), which in turn directly affects the overall prognosis of ANCA-associated vasculitis. Plasma exchange (PLEX) has long been proposed and used for these most severe disease manifestations under the assumption that its effects are swift and supported by our understanding of the pathogenic role of ANCA. Yet convincing evidence of a beneficial effect of PLEX in ANCA-associated vasculitis has been lacking, as early studies and small trials have generated conflicting results. BRD-6929 manufacturer The controversy regarding PLEX has been accentuated recently as the largest randomized controlled trial ever conducted in ANCA-associated vasculitis, the Plasma Exchange and Glucocorticoids in Severe ANCA-associated Vasculitis trial, which was specifically designed to evaluate the efficacy of PLEX in patients with severe renal disease or alveolar hemorrhage, failed to show a difference in the combined primary outcome measure of death or ESKD in patients who received PLEX versus those who did not. In light of these disappointing results, we herein review the currently available data on PLEX for ANCA-associated vasculitis and explain why we believe that these data no longer support the use of PLEX in ANCA-associated vasculitis.Oculopharyngodistal myopathy is a late-onset degenerative muscle disorder characterized by ptosis and weakness of the facial, pharyngeal, and distal limb muscles. A recent report suggested a non-coding trinucleotide repeat expansion in LRP12 to be associated with the disease. Here we report a genetic study in a Chinese cohort of 41 patients with the clinical diagnosis of oculopharyngodistal myopathy (21 cases from seven families and 20 sporadic cases). In a large family with 12 affected individuals, combined haplotype and linkage analysis revealed a maximum two-point logarithm of the odds (LOD) score of 3.3 in chromosomal region chr19p13.11-p13.2 and narrowed the candidate region to an interval of 4.5 Mb. Using a comprehensive strategy combining whole-exome sequencing, long-read sequencing, repeat-primed polymerase chain reaction and GC-rich polymerase chain reaction, we identified an abnormal CGG repeat expansion in the 5' UTR of the GIPC1 gene that co-segregated with disease. Overall, the repeat expansion in GIPC1 was identified in 51.
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