Rare Diseases Symptoms Automatic Extraction

[Molecular diagnosis for a novel deletion mutation of α thalassemia].

[alpha-thalassemia]

To raise awareness of the pathogenesis and diagnosis of thalassemia by reporting one case of α thalassemia patient with a large deletion fragment and analyzing the pedigree.Firstly, blood cells and hemoglobin electrophoresis analysis were used for screening of thalassemia, and then three common kinds of deletional α thalassemia in Chinese was detected by Gap-PCR, three common kinds of non- deletional α thalassemia and seventeen common mutations of β thalassemia in Chinese were analyzed by using PCR- RDB. The unknown mutation of samples was identified with Multiplex Ligation-dependent Probe Amplification (MLPA) and DNA sequencing.The proband female presented with microcytic hypochromic anemia(hemoglobin 71 g/L, mean corpuscular volume 52.4 fl, mean corpuscular hemoglobin 16.1 pg), and hemoglobin A2 1.4%. The identified large deletion fragment length was 21 925 bp, so far which had not been reported in the world and was named -α²¹·. It was registered in USA DNA database and GenBank accession number as KF360979. The genotype of her mother and father and brother were αα/-α²¹·, --(SEA)/-α³·, αα/-α³· respectively, and the genotype of her and her sister were the same of --(SEA)/-α²¹·. Her husband gene of thalassemia had no mutation, so prenatal diagnosis of thalassemia was not carried out in the pregnant woman.The discovery of -α(21.9) deletion mutation was enriched the DNA mutation gene database of thalassemia, and had important significance for genetic counseling and thalassemia prenatal diagnosis.

Diseases presenting "blood cells" symptom

  • adrenomyeloneuropathy
  • alpha-thalassemia
  • cadasil
  • cholangiocarcinoma
  • classical phenylketonuria
  • cutaneous mastocytosis
  • erdheim-chester disease
  • erythropoietic protoporphyria
  • heparin-induced thrombocytopenia
  • homocystinuria without methylmalonic aciduria
  • junctional epidermolysis bullosa
  • lamellar ichthyosis
  • lymphangioleiomyomatosis
  • monosomy 21
  • neonatal adrenoleukodystrophy
  • oral submucous fibrosis
  • scrub typhus
  • triple a syndrome
  • von hippel-lindau disease
  • waldenström macroglobulinemia
  • x-linked adrenoleukodystrophy
  • zellweger syndrome

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