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Journal of Human Genetics

Kishin Koh, Yuta Ichinose, Hiroyuki Ishiura, Haitian Nan, Jun Mitsui, Junya Takahashi, Wakiro Sato, Yoshiaki Itoh, Kyoko Hoshino, Shoji Tsuji, Yoshihisa Takiyama
The originally published version of this article contained an error in Fig. 1 and Table 2. The correct figure and table of this article should have read as below. This has now been corrected in the PDF and HTML versions of the article. The authors apologize for any inconvenience caused.
November 9, 2018: Journal of Human Genetics
Kenji Yamada, Takeshi Taketani
Mitochondrial fatty acid oxidation disorders (FAODs) are caused by defects in β-oxidation enzymes, including very long-chain acyl-CoA dehydrogenase (VLCAD), trifunctional protein (TFP), carnitine palmitoyltransferase-2 (CPT2), carnitine-acylcarnitine translocase (CACT) and others. During prolonged fasting, infection, or exercise, patients with FAODs present with hypoglycemia, rhabdomyolysis, cardiomyopathy, liver dysfunction, and occasionally sudden death. This article describes the diagnosis, newborn screening, and treatment of long-chain FAODs with a focus on VLCAD deficiency...
November 6, 2018: Journal of Human Genetics
Nana Sakakibara, Naoya Morisada, Kandai Nozu, Koji Nagatani, Toshiyuki Ohta, Junya Shimizu, Takuzo Wada, Yuko Shima, Tomohiko Yamamura, Shogo Minamikawa, Junya Fujimura, Tomoko Horinouchi, China Nagano, Akemi Shono, Ming Juan Ye, Yoshimi Nozu, Koichi Nakanishi, Kazumoto Iijima
Oral-facial-digital syndrome type 1 (OFD1) is a ciliopathy characterized by oral, facial, and digital malformations that are often accompanied by polycystic lesion of the kidney and central nervous involvement. OFD1 shows an X-linked recessive inheritance caused by mutation in the OFD1 gene (Xp22.2). The disease is generally considered embryonic lethal for hemizygous males. However, males with OFD1 mutations were recently reported. Here, we report four additional Japanese male patients with OFD1 variants and describe the variable clinical manifestation and disease severity among the four patients...
November 6, 2018: Journal of Human Genetics
Liang Ma, Yongwei Jiang, Xiaomu Kong, Qian Liu, Hailing Zhao, Tingting Zhao, Yongtong Cao, Ping Li
We investigated the interaction of MTHFR C677T polymorphism (rs1801133) with smoking in susceptibility to diabetic nephropathy (DN) in Chinese men with type 2 diabetes mellitus (T2DM). We studied 655 Chinese men with T2DM, who were divided into two groups (321 with DN and 334 without DN). The genotype of MTHFR C677T polymorphism was detected by real-time polymerase chain reaction. MTHFR TT genotype carried a higher risk of DN compared with the CC genotype (OR = 2.05; P = 0.002). The T allele showed marked association with DN development in patients who smoked, using additive, recessive, and dominant models (OR = 1...
November 5, 2018: Journal of Human Genetics
Toshiyuki Fukao, Hideo Sasai, Yuka Aoyama, Hiroki Otsuka, Yasuhiko Ago, Hideki Matsumoto, Elsayed Abdelkreem
Beta-ketothiolase (mitochondrial acetoacetyl-CoA thiolase, T2) deficiency (OMIM #203750, *607809) is an inborn error of metabolism that affects isoleucine catabolism and ketone body metabolism. This disorder is clinically characterized by intermittent ketoacidotic crises under ketogenic stresses. In addition to a previous 26-case series, four series of T2-deficient patients were recently reported from different regions. In these series, most T2-deficient patients developed their first ketoacidotic crises between the ages of 6 months and 3 years...
November 5, 2018: Journal of Human Genetics
Naomichi Matsumoto
No abstract text is available yet for this article.
November 2, 2018: Journal of Human Genetics
Yang Chen, Jianying Xi, Wenhua Zhu, Jie Lin, Sushan Luo, Dongyue Yue, Shuang Cai, Chong Sun, Chongbo Zhao, Satomi Mitsuhashi, Ichizo Nishino, Minjie Xu, Jiahong Lu
GNE myopathy is a rare autosomal recessive distal myopathy caused by mutations in UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase (GNE), the bi-functional enzyme critical for sialic acid biosynthesis. In this study, we summarized the clinical features, pathological characteristics, and genetic profiles of 46 GNE patients. The clinical and mutational profile of 54 previously reported Chinese patients were also reviewed. A total of 21 novel mutations, including a gross deletion spanning exon 1-2 and a retrotransposon insertion were found in our cohort, enlarging the spectrum of GNE mutations...
November 2, 2018: Journal of Human Genetics
Riga Wu, Haixia Li, Dan Peng, Ran Li, Yinming Zhang, Bo Hao, Erwen Huang, Chenghao Zheng, Hongyu Sun
The human leukocyte antigen (HLA) genes are the most polymorphic genes in the human genome and have great power in forensic applications, especially in relationship testing and personal identification. However, the extreme polymorphism of HLA has made unambiguous genotyping of these genes very challenging and resulted in the limited application in relationship testing. Fortunately, massively parallel sequencing (MPS) technology offers the promise of unambiguous and high-throughput HLA typing. In this study, 11 HLA genes were typed in one extended family residing in North China and encompassing six generations...
October 22, 2018: Journal of Human Genetics
Malavika Hebbar, Anju Shukla, Sheela Nampoothiri, Stephanie Bielas, Katta M Girisha
Hereditary spastic paraplegias are a group of genetically heterogeneous neurological disorders characterized by progressive weakness and spasticity of lower limbs. We ascertained five families with eight individuals with hereditary spastic paraplegia. Pathogenic variants were identified by exome sequencing of index cases. The cohort consists of three families with spastic paraplegia type 47 (AP4B1) with a common mutation in two families, a family with spastic paraplegia type 50 (AP4M1), and two male siblings with X-linked spastic paraplegia 2 (PLP1)...
October 18, 2018: Journal of Human Genetics
Weiyu Li, Xiaojin He, Shenmin Yang, Chunyu Liu, Huan Wu, Wangjie Liu, Mingrong Lv, Dongdong Tang, Jing Tan, Shuyan Tang, Yujie Chen, Jiajia Wang, Zhiguo Zhang, Hongyan Wang, Li Jin, Feng Zhang, Yunxia Cao
Multiple morphological abnormalities of flagella (MMAF) are human reproduction disorders due to the dysplastic development of sperm flagella. The spermatozoa of men with MMAF manifest absent, short, coiled, bent, and/or irregular-caliber flagella. Previous studies revealed genetic contributions to human MMAF, but known MMAF-associated genes only explained approximately 50% MMAF cases. In this study, we employed human whole-exome sequencing for genetic analysis and identified biallelic mutations of CFAP251 (cilia- and flagella-associated protein 251, also known as WDR66) in three (5%) of 65 Han Chinese men with MMAF...
October 11, 2018: Journal of Human Genetics
Kishin Koh, Yuta Ichinose, Hiroyuki Ishiura, Haitian Nan, Jun Mitsui, Junya Takahashi, Wakiro Sato, Yoshiaki Itoh, Kyoko Hoshino, Shoji Tsuji, Yoshihisa Takiyama
PLA2G6-associated neurodegeneration (PLAN) comprises heterogeneous neurodegenerative disorders, including infantile neuroaxonal dystrophy, neurodegeneration with brain iron accumulation 2B, and Parkinson disease 14 (PARK14). In addition, very recently, PLA2G6 mutations have been reported to represent a phenotype of hereditary spastic paraplegia (HSP). In this study, we screened 383 HSP families to clarify the frequency of PLA2G6 mutations in the Japan Spastic Paraplegia Research Consortium, and revealed the clinical characteristics of HSP with PLA2G6 mutations...
October 9, 2018: Journal of Human Genetics
Ping Li, Yani He, Guangyan Cai, Fei Xiao, Jie Yang, Qinggang Li, Xiangmei Chen
Ciliopathies-are widely recognized and associated with a wide variety of developmental and degenerative disorders. Most cilia-related diseases have renal manifestation, and there is a cross- overlapping relationship between gene mutations and cilia disease. Here, we investigated the clinical and pathological manifestation of a rare disease patient. We present the case of a 15-year-old child with dysplasia and multiple-organ damage who was initially diagnosed with nephrotic syndrome. The patient's kidney disease progressed to renal failure and received hemodialysis 10 months after renal biopsy...
October 5, 2018: Journal of Human Genetics
Taku Miyagawa, Seik-Soon Khor, Hiromi Toyoda, Takashi Kanbayashi, Aya Imanishi, Yohei Sagawa, Nozomu Kotorii, Tatayu Kotorii, Yu Ariyoshi, Yuji Hashizume, Kimihiro Ogi, Hiroshi Hiejima, Yuichi Kamei, Akiko Hida, Masayuki Miyamoto, Azusa Ikegami, Yamato Wada, Masanori Takami, Yuichi Higashiyama, Ryoko Miyake, Hideaki Kondo, Yota Fujimura, Yoshiyuki Tamura, Yukari Taniyama, Naoto Omata, Yuji Tanaka, Shunpei Moriya, Hirokazu Furuya, Mitsuhiro Kato, Yoshiya Kawamura, Takeshi Otowa, Akinori Miyashita, Hiroto Kojima, Hiroh Saji, Mihoko Shimada, Maria Yamasaki, Takumi Kobayashi, Rumi Misawa, Yosuke Shigematsu, Ryozo Kuwano, Tsukasa Sasaki, Jun Ishigooka, Yuji Wada, Kazuhito Tsuruta, Shigeru Chiba, Fumiaki Tanaka, Naoto Yamada, Masako Okawa, Kenji Kuroda, Kazuhiko Kume, Koichi Hirata, Naohisa Uchimura, Tetsuo Shimizu, Yuichi Inoue, Yutaka Honda, Kazuo Mishima, Makoto Honda, Katsushi Tokunaga
Essential hypersomnia (EHS) is a lifelong disorder characterized by excessive daytime sleepiness without cataplexy. EHS is associated with human leukocyte antigen (HLA)-DQB1*06:02, similar to narcolepsy with cataplexy (narcolepsy). Previous studies suggest that DQB1*06:02-positive and -negative EHS are different in terms of their clinical features and follow different pathological pathways. DQB1*06:02-positive EHS and narcolepsy share the same susceptibility genes. In the present study, we report a genome-wide association study with replication for DQB1*06:02-negative EHS (408 patients and 2247 healthy controls, all Japanese)...
September 28, 2018: Journal of Human Genetics
Xiaoting Lou, Hao Shi, Shumeng Wen, Yuanyuan Li, Xiujuan Wei, Jie Xie, Lin Ma, Yanling Yang, Hezhi Fang, Jianxin Lyu
The originally published version of this article contained an error in Figure 1. The correct figure of this article should have read as below. This has now been corrected in the PDF and HTML versions of the article. The authors apologize for any inconvenience caused.
September 28, 2018: Journal of Human Genetics
Kohei Hamanaka, Satoko Miyatake, Ayelet Zerem, Dorit Lev, Luba Blumkin, Kenji Yokochi, Atsushi Fujita, Eri Imagawa, Kazuhiro Iwama, Mitsuko Nakashima, Satomi Mitsuhashi, Takeshi Mizuguchi, Atsushi Takata, Noriko Miyake, Hirotomo Saitsu, Marjo S van der Knaap, Tally Lerman-Sagie, Naomichi Matsumoto
Biallelic mutations in IBA57 cause a mitochondrial disorder with a broad phenotypic spectrum that ranges from severe intellectual disability to adolescent-onset spastic paraplegia. Only 21 IBA57 mutations have been reported, therefore the phenotypic spectrum of IBA57-related mitochondrial disease has not yet been fully elucidated. In this study, we performed whole-exome sequencing on a Sepharadi Jewish and Japanese family with leukodystrophy. We identified four novel biallelic variants in IBA57 in the two families: one frameshift insertion and three missense variants...
September 27, 2018: Journal of Human Genetics
Jesse Slone, Yanyan Peng, Adam Chamberlin, Belinda Harris, Julie Kaylor, Marie T McDonald, Monica Lemmon, Mays Antonine El-Dairi, Dmitry Tchapyjnikov, Laura A Gonzalez-Krellwitz, Elizabeth A Sellars, Allyn McConkie-Rosell, Laura G Reinholdt, Taosheng Huang
Mitochondrial dysfunction lies behind many neurodegenerative disorders, owing largely to the intense energy requirements of most neurons. Such mitochondrial dysfunction may work through a variety of mechanisms, from direct disruption of the electron transport chain to abnormal mitochondrial biogenesis. Recently, we have identified biallelic mutations in the mitochondrial flavoprotein "ferredoxin reductase" (FDXR) gene as a novel cause of mitochondriopathy, peripheral neuropathy, and optic atrophy...
September 25, 2018: Journal of Human Genetics
Shigeo Takashima, Hirotomo Saitsu, Nobuyuki Shimozawa
The concept of peroxisomal diseases is expanding because of improvements in diagnostic technology based on advanced biochemical analysis and development of next-generation sequencing. For quicker and more accurate diagnosis of as many patients as possible, we developed a new diagnostic system combining the conventional diagnostic system and comprehensive mutational analysis by whole-exome sequencing in Japan. Adrenoleukodystrophy (ALD) is the most common peroxisomal disease. In the cerebral type of ALD, hematopoietic stem cell transplantation is the only treatment in the early stage, and thus prompt diagnosis will improve the prognosis of affected patients...
September 20, 2018: Journal of Human Genetics
Hou-Sung Jung, Stephanie E Vallee, Mary Beth Dinulos, Gregory J Tsongalis, Joel A Lefferts
We present a case of a newborn female with multiple anomalies demonstrating that the causes of imprinting disorders rely not only on the parent-of-origin of the chromosomal aberrations, but also the scope of genes contained in the imprinted region. The newborn female presented with prenatal polyhydramnios, neonatal respiratory distress, distal contractures, abdominal hernia, bell-shaped thorax, and abnormal ribs. The neonate required mechanical ventilation due to apnea, underwent surgery for laryngomalacia, and showed development delay by age 11 months...
September 19, 2018: Journal of Human Genetics
Masaki Takagi, Satoshi Shimomura, Ryuji Fukuzawa, Satoshi Narumi, Gen Nishimura, Tomonobu Hasegawa
Spondylocarpotarsal synostosis syndrome (SCT) is a rare group of skeletal dysplasias, characterized by disproportionate short stature with a short trunk, abnormal segmentation of the spine with vertebral fusion, scoliosis and lordosis, carpal and tarsal synostosis, and mild facial dysmorphisms. While the majority of the cases show autosomal recessive inheritance, only a few cases of vertical transmissions, with MYH3 mutations, have been reported. Here we report a case with typical SCT, carrying a novel heterozygous mutation in MYH3...
September 18, 2018: Journal of Human Genetics
Hiroko Toda, Sasagu Kurozumi, Yuko Kijima, Tetsuya Idichi, Yoshiaki Shinden, Yasutaka Yamada, Takayuki Arai, Kosei Maemura, Takaaki Fujii, Jun Horiguchi, Shoji Natsugoe, Naohiko Seki
Triple-negative breast cancer (TNBC) is an aggressive type of cancer associated with a poor prognosis. Identification of novel therapeutic targets in TNBC is urgently needed. Here, we investigated the microRNA (miRNA) expression signature of TNBC using clinical specimens. In total, 104 miRNAs (56 upregulated and 48 downregulated) were significantly dysregulated in TNBC tissues; miR-204-5p showed the most dramatic downregulation. We then examined the antitumor roles of miR-204-5p in breast cancer (BC) cells...
September 18, 2018: Journal of Human Genetics
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