Anemia, Dyserythropoietic, Congenital/complications* ; Cholelithiasis/complications* ; Hemochromatosis ; Humans

Haemochromatosis is characterised by elevated transferrin saturation (TSAT) and progressive iron loading that mainly affects the liver. Early diagnosis and treatment by phlebotomy can prevent cirrhosis, hepatocellular carcinoma, diabetes, arthropathy and other complications. In patients homozygous for p.Cys282Tyr in HFE, provisional iron overload based on serum iron parameters (TSAT >45% and ferritin >200 μg/L in females and TSAT >50% and ferritin >300 μg/L in males and postmenopausal women) is sufficient to diagnose haemochromatosis. In patients with high TSAT and elevated ferritin but other HFE genotypes, diagnosis requires the presence of hepatic iron overload on MRI or liver biopsy. The stage of liver fibrosis and other end-organ damage should be carefully assessed at diagnosis because they determine disease management. Patients with advanced fibrosis should be included in a screening programme for hepatocellular carcinoma. Treatment targets for phlebotomy are ferritin <50 μg/L during the induction phase and <100 μg/L during the maintenance phase.
Male ; Humans ; Female ; Hemochromatosis/therapy* ; Hemochromatosis Protein/genetics* ; Carcinoma, Hepatocellular/complications* ; Iron Overload/genetics* ; Ferritins ; Liver Cirrhosis/complications* ; Iron ; Fibrosis ; Liver Neoplasms/complications* ; Transferrins

Hemochromatosis/genetics* ; Histocompatibility Antigens Class I/genetics* ; Humans ; Mutation ; Receptors, Transferrin/genetics*

No abstract available.
Hemochromatosis ; Humans ; Infant

OBJECTIVE: The explore the molecular basis of iron-overload in Tibet nationality population of Tibet. METHODS: The inpatients with iron-overload in our department from Dec. 1st 2014 to Jul.31st 2016 were enrolled in this study. Abdominal MRI and the mutation sites C282Y and H63D in HFE exon were examined. For HFE mutation-negative patients, the non-HFE mutation was detected, including 5 HJV mutations of G320V, p.Q312X, p.D249H, p.I281T, p.C321X and 2 TFR2 mutations: (Y250X, I238M), and 2 SLC40A1 mutations: (V162del, N144H). RESULTS: Among 113 iron overload patients, only one showed homozygous p.H63D mutation, and one showed heterozygosis p.H63D mutation. In 73 patients accepted non-HFE gene detection, only one was heterozygosis p.D249N mutation in HJV, and one was heterozygosis p.I238M mutation in TFR2. CONCLUSION Currently, the pathogenic gene for Tibetan iron-overload has not yet been found.
Genotype ; Hemochromatosis Protein ; Histocompatibility Antigens Class I ; Humans ; Iron Overload ; Mutation ; Tibet

Hemochromatosis is a hereditary or acquired chronic iron overload syndrome that presents with organ damage to the liver, pancreas, heart, joints and skin due to pathologic iron deposition. Hereditary hemochromatosis is a common genetic disorder with human hemochromatosis protein (HFE) mutations found in European ethnic groups but has low-prevalence in the Asian population. Secondary or acquired hemochromatosis may result from ineffective erythropoiesis, liver disease and parenteral iron overload. A 51-year-old Filipino woman presented with generalized hyperpigmentation associated with severe anemia and hepatomegaly. Laboratory investigation revealed a markedly elevated serum ferritin (>2,000 g/L, 10x the normal) and hepatic aminotransferases (6x elevated). Magnetic resonance imaging (MRI) T2-weighted images revealed hypotense signal of the liver with the magnetic susceptibility measurement (MSM) of iron at 12.297 mg/g indicating severe iron overload. Dermatopathology findings revealed hyperpigmented epidermis with hemosiderin found in the basal keratinocytes as well as around cutaneous adnexal structures. Special stain with Perls’ Prussian blue revealed iron granules that are seen as blue pigments in the epidermis and dermis. Treatment with the oral iron chelator deferiprone (DFP) showed improvement. However, the patient developed hospital-acquired sepsis, deteriorated, and eventually died.
Hemochromatosis ; Iron

Hemochromatosis is an inherited or secondary disorder caused by excessive iron storage leading to multiple organ damage. We describe 2 patients with diabetes mellitus caused by hemochromatosis secondary to multiple blood transfusions due to severe aplastic anemia. Subject 1, who was diagnosed with severe aplastic anemia at 15 years of age, received multiple red blood cell transfusions before he underwent autologous peripheral blood stem cell transplantation (PBSCT) at 22 years of age. At 21 years of age, hyperglycemia was detected with increased hemoglobin A1c and serum ferritin levels, 9.7% and 12,910 ng/mL (normal range, 20–320 ng/mL), respectively. The 24-hour urine C-peptide level was normal with negative antiglutamic acid decarboxylase antibody. Subsequently, metformin and an iron-chelating agent were administered. However, an intensive insulin regimen was necessary 2 years after the onset of diabetes. Subject 2, who was diagnosed with severe aplastic anemia at 2 years of age, received multiple blood transfusions until she underwent haploidentical PBSCT at 13 years of age. At 11 years of age, she developed diabetes mellitus with a high serum ferritin level (12,559.8 ng/mL). She is currently 18 years old and has been treated with an intensive insulin regimen and estrogen/progesterone replacement therapy because of hypogonadotropic hypogonadism. It is presumed that the loss of insulin secretory capacity and insulin resistance played a role in the pathogenesis of diabetes mellitus due to hemochromatosis in these cases.
Anemia, Aplastic* ; Blood Transfusion* ; C-Peptide ; Diabetes Mellitus* ; Erythrocyte Transfusion ; Ferritins ; Hemochromatosis* ; Humans ; Hyperglycemia ; Hypogonadism ; Insulin ; Insulin Resistance ; Iron ; Metformin ; Peripheral Blood Stem Cell Transplantation

Objective: To determine if the CD14/-159 and the TNFα/-308 single nucleotide polymorphisms (SNPs) are associated with the development of Idiopathic Neonatal Hepatitis (INH) in Filipino children. Methods: Genomic DNA from 33 patients diagnosed with INH and 33 age- and sex-matched controls, children without any liver disease, were recruited. Baseline serum total bilirubin (TB), direct bilirubin (DB), and alkaline phosphatase (ALP) of the patients were obtained from their medical records. Genotypes for CD14/159 and TNFα/-308 were determined via PCR and direct sequencing. Results: No significant difference was seen between the frequency of the CD14/-159 T allele (p=0.86) nor the TNFα/-308 A allele (p=0.62) between INH patients and controls. There was also no significant difference between the genotypic distribution of the INH and control populations for both CD14/-159 (p=0.54) and TNFα/-308 (p=0.62). There were also no significant differences noted between the different genotypes of CD14/159 and TNFα/-308 and levels of alkaline phosphatase (p=0.65, p=0.91), total bilirubin (p=0.89, p=0.75), and direct bilirubin (p=0.93, p=0.68). Conclusion In this preliminary study, CD14/-159 and TNFα/-308 showed no association with the development of INH among Filipinos.
Polymorphism, Genetic ; Neonatal hemochromatosis

Studies examining the association of hemochromatosis (HFE) gene polymorphisms and susceptibility to alcoholic liver disease (ALD) yielded inconsistent results. Thus, we performed a metaanalysis to investigate whether the variations in HFE gene increase the risk of ALD. The studies published up to Feb. 2014 were identified by searching PubMed/MEDLINE, ISI Web of Science, EMBASE and China National Knowledge Infrastructure databases, which was complemented by screening the references of the retrieved studies. For all genotypes and alleles, the odds ratios (ORs) with 95% confidence intervals (CIs) according to the heterogeneity were pooled using fixed-effect model. Sixteen studies with 1933 cases and 9874 controls were included for this meta-analysis. C282Y/C282Y, C282Y/wild type, H63D/wild type and C282Y/H63D were found not to be associated with susceptibility to ALD, but increased risk of H63D/H63D (OR: 1.52, 95% CI: 1.05-2.22, P=0.029) was observed for ALD when compared to total control. Comparison of ALD patients with alcoholics without liver damage revealed a significant association of D allele, as well as a marginal association of H63D/wild type with ALD, while H63D/H63D was not significantly associated with ALD although increased value of OR was obtained. The presence of Y allele and other genotypes yielded insignificant findings when ALD patients were compared with alcoholics without liver damage. No evident publication bias or significant heterogeneity among studies was detected in this meta-analysis. In conclusion, our metaanalysis showed a marginal higher prevalence of H63D variant in ALD but did not support an increased risk of C282Y mutation.
Alleles ; Genetic Association Studies ; Genetic Predisposition to Disease ; Genotype ; Hemochromatosis Protein ; genetics ; Humans ; Liver Diseases, Alcoholic ; genetics ; pathology ; Mutation ; Polymorphism, Single Nucleotide

OBJECTIVEThis review focuses on the current knowledge on the implication and significance of beta 2 microglobulin (β2M), a conservative immune molecule in vertebrate.

DATA SOURCESThe data used in this review were obtained from PubMed up to October 2015. Terms of β2M, immune response, and infection were used in the search.

STUDY SELECTIONSArticles related to β2M were retrieved and reviewed. Articles focusing on the characteristic and function of β2M were selected. The exclusion criteria of articles were that the studies on β2M-related molecules.

RESULTSβ2M is critical for the immune surveillance and modulation in vertebrate animals. The dysregulation of β2M is associated with multiple diseases, including endogenous and infectious diseases. β2M could directly participate in the development of cancer cells, and the level of β2M is deemed as a prognostic marker for several malignancies. It also involves in forming major histocompatibility complex (MHC class I or MHC I) or like heterodimers, covering from antigen presentation to immune homeostasis.

CONCLUSIONSBased on the characteristic of β2M, it or its signaling pathway has been targeted as biomedical or therapeutic tools. Moreover, β2M is highly conserved among different species, and overall structures are virtually identical, implying the versatility of β2M on applications.

Antigens, CD1 ; physiology ; Hemochromatosis Protein ; analysis ; Histocompatibility Antigens Class I ; physiology ; Humans ; Receptors, Fc ; physiology ; beta 2-Microglobulin ; blood ; chemistry ; deficiency ; physiology