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Park, Jongho,Lee, Kimoon,Lee, Seung Yong,Nandadasa, Chandani N.,Kim, Sungho,Lee, Kyu Hyoung,Lee, Young Hee,Hosono, Hideo,Kim, Seong-Gon,Kim, Sung Wng American Chemical Society 2017 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.139 No.2
<P>We have synthesized a single crystalline Y2C electride of centimeter-scale by floating-zone method and successfully characterized its anisotropic electrical and magnetic properties. In-plane resistivity upturn at low temperature together with anisotropic behavior of negative magnetoresistance is ascribed to the stronger suppression of spin fluctuation along in-plane than that along the c-axis, verifying the existence of magnetic moments preferred for the c-axis. A superior magnetic moment along the c-axis to that along the in-plane direction strongly demonstrates the anisotropic magnetism of Y2C electride containing a magnetically easy axis. It is clarified from the theoretical calculations that the anisotropic nature of the Y2C electride originates from strongly localized anionic electrons with an inherent magnetic anisotropy in the interlayer spaces.</P>
Mutations of <i>ADAMTS9</i> Cause Nephronophthisis-Related Ciliopathy
Choi, Yo Jun,Halbritter, Jan,Braun, Daniela A.,Schueler, Markus,Schapiro, David,Rim, John Hoon,Nandadasa, Sumeda,Choi, Won-il,Widmeier, Eugen,Shril, Shirlee,Kö,rber, Friederike,Sethi, Sidharth K. Elsevier 2019 American journal of human genetics Vol.104 No.1
<P>Nephronophthisis-related ciliopathies (NPHP-RCs) are a group of inherited diseases that are associated with defects in primary cilium structure and function. To identify genes mutated in NPHP-RC, we performed homozygosity mapping and whole-exome sequencing for >100 individuals, some of whom were single affected individuals born to consanguineous parents and some of whom were siblings of indexes who were also affected by NPHP-RC. We then performed high-throughput exon sequencing in a worldwide cohort of 800 additional families affected by NPHP-RC. We identified two <I>ADAMTS9</I> mutations (c.4575_4576del [p.Gln1525Hisfs<SUP>∗</SUP>60] and c.194C>G [p.Thr65Arg]) that appear to cause NPHP-RC. Although ADAMTS9 is known to be a secreted extracellular metalloproteinase, we found that ADAMTS9 localized near the basal bodies of primary cilia in the cytoplasm. Heterologously expressed wild-type ADAMTS9, in contrast to mutant proteins detected in individuals with NPHP-RC, localized to the vicinity of the basal body. Loss of ADAMTS9 resulted in shortened cilia and defective sonic hedgehog signaling. Knockout of <I>Adamts9</I> in IMCD3 cells, followed by spheroid induction, resulted in defective lumen formation, which was rescued by an overexpression of wild-type, but not of mutant, ADAMTS9. Knockdown of <I>adamts9</I> in zebrafish recapitulated NPHP-RC phenotypes, including renal cysts and hydrocephalus. These findings suggest that the identified mutations in <I>ADAMTS9</I> cause NPHP-RC and that ADAMTS9 is required for the formation and function of primary cilia.</P>