Detection of homozygous haemoglobin Constant Spring by capillary electrophoresis method. Abstract Background: Hemoglobin (Hb) Constant Spring is an alpha-globin gene variant due to a mutation of the stop codon resulting in the elongation of the encoded polypeptide from 141 to 172 amino acid residues. Homozygous haemoglobin Constant Spring: a need for revision of concept. Discussion In approximately 50% 0f individuals with HbH disease in Southeast Asia, small quantities of hemoglobin Constant Spring are found (4). Abbreviation to define. Serial Doppler ultrasound for measurement peak systolic velocity (PSV) of middle cerebral artery (MCA) was used for evaluation of fetal anemia. CS/CS is defined as Constant Spring , homozygous haemoglobin Constant Spring rarely. Methods: We retrospectively describe clinical manifestations, diagnosis, laboratory … Structural studies of the isolated abnormal hemoglobin showed it to be identical to Hb Constant Spring (Hb CoSp), an α-chain variant with 172 residues instead of the usual 141, the additional 31 being attached to the C-terminal end. [Crossref] 4. The concentration of Hb CS in the circulation is significantly reduced, with the estimation of 1–2% of the total Hb in the heterozygote state. IntroductionHemoglobin Constant Spring (Hb CS) is α-chain structural hemoglobin variant caused by a C-T substitution at the termination codon of the α 2 -globin gene. METHODS: Six fetuses with homozygous Hb CS disease undergoing intrauterine transfusion (IUT) were comprehensively reviewed. This condition was first discovered in Constant Spring, in Jamaica, from a Chinese family together with Hb H disease . The elongated alpha-globin chains of hemoglobin Constant Spring (alpha cs chain of HbCS ) are produced in low amounts such that the alpha cs-gene acts as a form of alpha-thalassemia; yet in the homozygous state the pathophysiological effects of this mutant are more severe than in the corresponding conditions that result from alpha-globin gene deletions. Alpha thalassemia trait is characterized by two functional genes that code for the production of alpha globins [(-α/-α) or (--/αα)]. Patients who are homozygous for this mutation (that is, both alpha-2 globin genes are affected) have a more serious clinical phenotype than those who are homozygous for deletional alpha(+) thalassemia. Hum Genet 59: 250-255. Hemoglobin H Constant Spring is a variant of alpha thalassemia where two alpha globin genes are lost plus one alpha globin gene is mutated. Corpus ID: 34549089. Abstract. Homozygous Constant Spring: the first case described in the West In this work we present the clinical and laborato-ry data and the molecular identification of homozy- Punnett Squares. Two Constant Spring carriers can also pass on their genes to have a child with Homozygous Constant Spring, a condition that has similar clinical implications as Hemoglobin H disease. When Hb H disease is combined with Hb Constant Spring, the severity of disease is more than that of Hb H disease alone. Hemoglobin Constant Spring (Hb CS) and Hb Paksé, two abnormal Hbs characterized by elongated α-globin chains resulting from mutations of the termination codon in the α2-globin gene, are the most prevalent nondeletional α-thalassemias in Southeast Asia. Fetal Anemia Causing Hydrops Fetalis From an Alpha-Globin Variant: Homozygous Hemoglobin Constant Spring We report 7 cases with fetal anemia causing hydrops fetalis. low. Examples: NFL, NASA, PSP, HIPAA. Patients with homozygous Hb Constant Spring are usually mildly anemic. Hematologic and biosynthetic studies in homozygous hemoglobin Constant Spring. J Pediatr Hematol Oncol. ARC J Hematol 1: 28-32. Hemoglobin (Hb) Q-Thailand [alpha74(EF3): Asp-->His] is an abnormal Hb found mainly in China and South-east Asian countries. 64, No. mean corpuscular hemoglobin (MCH) low. Homozygous Constant Spring: the first case described in the west Homozygous Hb CS was obtained from 7 women (2.4%). We use cookies to ensure that we give you the best experience on our website. Who's at Risk Alpha thalassemia is commonly associated with Asia, Africa, and the Mediterranean area. Hemoglobin Constant Spring (HbCS) is a hemoglobin variant with an elongated a ... Heterozygous state of Hb CS was found in 1/5 (20.5%) of women participating. However, if a child inherits one Hb Constant Spring from the mother and one from the father, the child has homozygous Hb Constant Spring and the severity of the disease is similar to that of Hb H disease. Homozygous Hemoglobin Constant Spring with Normal Electrophoresis: A Possible Cause for Under-Diagnosis Krishnamurti, Lakshmanan; Little, Jane A. Abstract. Background: Hemoglobin (Hb) Constant Spring is an alpha-globin gene variant due to a mutation of the stop codon resulting in the elongation of the encoded polypeptide from 141 to 172 amino acid residues. Twenty-two patients with mild haemolytic anaemia and haemoglobin (Hb) Constant Spring (CS) of around 6% were studied because they were suspected of having homozygous Hb CS. J Clin Invest 73: 1673-1682. Gallivan MVE, Vlastos EJ, Hanson RD, Bettinoti MP, Schonberg SA, et al (2009) Hemoglobin H hydrops fetalis associated with homozygous hemoglobin Constant Spring. OBJECTIVE: To describe fetal management of homozygous hemoglobin constant spring (Hb CS). 2018; 40(5):405-408 (ISSN: 1536-3678) If you click 'Continue' we'll assume that you are happy to receive all … HbCS variants have an almost normal mean cell volume (MCV) and the anemia is more severe when compared with other α-thalassemic variants. Abstract. By S Derry, W G Wood, M Pippard, J B Clegg, D J Weatherall, S N Wickramasinghe, J Darley, S Fucharoen and P Wasi Cite Printer friendly. The elongated alpha-globin chains of hemoglobin Constant Spring (alpha cs chain of HbCS ) are produced in low amounts such that the alpha cs-gene acts as a form of alpha-thalassemia; yet in the homozygous state the pathophysiological effects of this mutant are more severe than in the corresponding conditions that result from alpha-globin gene deletions. Tweet. Patients with Hb H/Constant Spring will have an MCV that is normal to mildly low, and those homozygous for Hb Constant Spring will often have a normal MCV. Hemoglobin Constant Spring (HbCS) is the most common nondeletional α-thalassemic mutation and is an important cause of HbH-like disease in Southeast Asia. This is the case with Hemoglobin Constant Spring, which is caused by a mutation in the alpha-2 globin gene. Methods: We retrospectively describe clinical manifestations, diagnosis, laboratory … moglobin Constant Spring(acs chain ofHbCS)are pro-duced in low amounts such that the acs-gene acts as a form ofa-thalassemia; yet in the homozygous state the pathophysiological effectsofthis mutantare moresevere thanin thecorresponding conditions that result from a-globingenedeletions. Detection of Homozygous Haemoglobin Constant Spring by Capillary Electrophoresis Method @inproceedings{Azma2016DetectionOH, title={Detection of Homozygous Haemoglobin Constant Spring by Capillary Electrophoresis Method}, author={Raja-Zahratul Azma and Khamisah M-Gaus and Suria A-Aziz and Hafiza Alauddin … Patients with homozygous Hb Constant Spring are usually mildly anemic. An example of a Punnett square for pea plants is shown in Figure below.In this example, both parents are heterozygous for flowercolor (Bb).The gametes produced by the male parent are at the top of … A Punnett square is a chart that allows you to easily determine the expected percentage of different genotypes in the offspring of two parents. Publication: Annals of the New York Academy of Sciences. Vol. The elongated alpha-globin chains of hemoglobin Constant Spring (alpha cs chain of HbCS ) are produced in low amounts such that the alpha cs-gene acts as a form of alpha-thalassemia; yet in the homozygous state the pathophysiological effects of this mutant are more severe than in the corresponding conditions that result from alpha-globin gene deletions. Association of Hb Q-Thailand with homozygous Hb E and heterozygous Hb Constant Spring in pregnancy. CS/CS stands for Constant Spring , homozygous haemoglobin Constant Spring. Routine Hb analyses using high‐performance liquid chromatography identified abnormal Hb migrating after Hb A 2 in addition to a homozygous Hb E in the proband 1 and to a heterozygous Hb Constant Spring (Hb CS) in the proband 2. Homozygous Hb CS might have similar phenotypes with thalassemia intermedia . Menu Search "AcronymAttic.com. Find. Family studies revealed Hb CS trait in both parents of eight patients, supporting that they were homozygous for Hb CS. The high frequency of hemoglobin Constant Spring (CS) in the Southeast Asian population can lead to the HbH (--/-αCS) phenotype, which involves an elongated form of alpha-globin chain. Association of the alpha(Q-Thailand) allele with alpha-thalassemia has important implications in diagnosis. Derry S, Wood WG, Pippard M, Clegg JB, Weatherall DJ, et al. PCR- testing for Hb Constant Spring in our patient identified homozygous mutation in codon 142. 2, 1975 BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS HEMOGLOBIN CONSTANT SPRING : HEMOGLOBIN SYNTHESIS IN HETEROZYGOUS AND HOMOZYGOUS STATES* S. Pongsamart, S. Pootrakul7, P. Wasi, and S. Na-Nakorn Division of Hematology, Department of Medicine, Faculty of Medicine Siriraj … Fetal Anemia Causing Hydrops Fetalis From an Alpha-Globin Variant: Homozygous Hemoglobin Constant Spring. [Crossref] 5. (1984) Hematologic and biosynthetic studies in homozygous hemoglobin Constant Spring. 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