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Biomedical subjects

K Harano

Publications and source records attributed to K Harano.

At least 73 records · Page 4Linked to original sources
PubMed1990

[An experimental study of sensory innervation of the ureter in the dog using wheat germ agglutinin-horseradish peroxidase conjugates].

The sensory innervations of the ureter in the dog were studied using the anterograde and retrograde axonal transport of wheat germ agglutinin-horseradish peroxidase conjugates (WGA-HRP). Following upper ureteral injections, labeled cells were observed in the ipsilateral T7-L3 spinal ganglia to the injection site, with the greatest concentration at the T12-L2 levels. And labeled cells were seen in the contralateral T7--L3 spinal ganglia to the injection site with the greatest concentration at the T10 and L3 ganglia. Lower ureter injections resulted in the labeling of ipsilateral T11-Co1 and contralateral T9-Co1 spinal ganglia, with highest concentration at the ipsilateral L3 and S2 levels. Following thoracic and lumbar spinal ganglia T12, L1-L3 injections labeled fibers bundles were observed in the adventitia of the upper and lower ureter. Some labeled fibers were bifurcated from these bundles and passed through the two layers of the smooth muscles. In tunica submucosa and tunica propria mucosae, many labeled fibers were observed. A few labeled fibers were seen in the epithelium. After injections into the sacral and coccygeal spinal ganglia S1-Co1, labeled fibers were not observed in the upper ureter. Course and distribution of labeled fibers in the lower ureter were similar to those of the case in which injection was done into the thoracic and lumbar spinal ganglia.

Animals↗
PubMed1990

[Structural analysis of abnormal hemoglobin by the polymerase chain reaction (PCR) of genomic DNA].

Determination of the primary structure of abnormal Hbs on the basis of DNA sequencing of the globin gene obtained from a carrier of abnormal Hb was performed. DNA obtained from the leukocytes of the peripheral blood was amplified by the polymerase chain reaction (PCR) using the proper amplification primer set. Amplified DNA was digested with two different restriction endonucleases and cloned to vector M 13 mp 18 or mp 19, which had been digested with the same enzymes. DNA sequencing was done by the dideoxy chain termination method using T 7 DNA polymerase, and the abnormal Hbs whose primary structure was determined were as follows: Hb Fukuoka [beta 2 His(CAC/T)----Tyr(TAT)], Hb Machida [beta 6 Glu(GAG)----Gln (CAG)], Hb Hope [beta 136 Gly(GGT)----Asp(GAT)], Hb Hiroshima [beta 146 His(CAC)----Asp(GAC)] and Hb Kodaira [beta 146 His(CAC)----Gln(CAA)]. This method for determining the primary structure of abnormal Hbs might be more effective than the ordinary method, which involves amino acid analysis and amino acid sequencing of the abnormal peptide obtained from abnormal Hb.

DNA↗
PubMed1989

Structure-function relationships in hemoglobin Kariya, Lys-40(C5) alpha----Glu, with high oxygen affinity. Functional role of the salt bridge between Lys-40 alpha and the beta chain COOH terminus.

The epsilon-amino group of Lys-40 alpha forms a salt bridge with the alpha-carboxyl group of beta chain in deoxyhemoglobin and is considered to impose a constraint upon hemoglobin tetramer, stabilizing the T quaternary structure. Hb Kariya, in which Lys-40 alpha is replaced by Glu, provides a unique opportunity to investigate the functional role of this salt bridge. Hb Kariya showed oxygen binding properties characterized by a high affinity, diminished cooperativity, a reduced alkaline Bohr effect, and a decreased effect of phosphates upon oxygen affinity. In deoxyHb Kariya the reactivity of the sulfhydryl groups of cysteins-93 beta with 4,4'-dipyridine disulfide was profoundly enhanced, being comparable to that for normal oxyhemoglobin (oxyHb A). The Soret band spectra, UV derivative spectra, and UV oxyminus-deoxy difference spectra indicated that oxyHb Kariya assumes a quaternary structure similar to that of oxyHb A whereas the T structure of deoxyHb Kariya is destabilized, and Hb Kariya remains predominantly in the R state upon deoxygenation. Resonance Raman scattering by deoxyHb Kariya showed that the Fe-N epsilon(proximal His) bond is less stretched than that of deoxyHb A. These experimental results provide structural basis for explaining the oxygen binding characteristics of Hb Kariya and further give direct evidence that the intersubunit salt bridge between Lys-40 alpha and the beta chain COOH terminus actually contributes to stabilization of the T quaternary structure, thereby playing a key role in cooperative oxygen binding by hemoglobin. The nature of another salt bridge between Asp-94 beta and the COOH-terminal His of beta chain was also discussed in comparison with the salt bridge involving Lys-40 alpha.

2,3-Diphosphoglycerate↗
PubMed1989

Hemoglobin Hope found in a patient with basal cell carcinoma of the genial region.

Hemoglobinopathy was detected in a 72-year-old female with basal cell carcinoma of the genial region during high-performance liquid chromatography of hemolysate for the assay of HbA1c. Structural analysis demonstrated that this abnormal hemoglobin was identical to Hb Hope [beta 136(H14)Gly----Asp]. No clinical or hematological abnormality was observed. A study of the family revealed that a younger sister and two sons of the propositus had the same hemoglobin variant. This is the second observation of Hb Hope in a Japanese family.

Aged↗
PubMed1989

[The molecular basis of HbH disease in a Japanese girl].

Hemoglobin H disease is often caused by deletion of three of the four alpha-globin genes (genotype: --/-alpha). We studied a Japanese girl who had microcytic hypochromic anemia, a decreased alpha/beta globin synthetic ratio and about 8% Hb H in her fresh hemolysate, by means of restriction endonuclease mapping of the alpha-like gene complex (5'-zeta-phi zeta-phi alpha 2-phi alpha 1-alpha 2-alpha 1-theta-3') with zeta- and alpha-specific probes. It was found that the defect of one chromosome was associated with the removal of about 18 kb of DNA, known as --SEA type alpha-thalassemia-1, including the deletion of the part of phi alpha 2, phi alpha 1, alpha 2, alpha 1, and theta globin genes, while the other one was associated with the removal of 3.7 kb of DNA, known as rightward deletion type alpha-thalassemia-2. The results of a family study demonstrated that the deletion haplotype --SEA was inherited from her father's side and the other -alpha 3.7 from her mother's side.

Asian People↗
PubMed1988

Characterization of abnormalities in the gamma-globin gene arrangements of Japanese newborns.

Cord blood samples from 889 healthy Japanese newborns from three districts of Honshu Island were studied with the purpose of characterizing the gamma-globin genes in the Japanese. The A gamma T gene frequency was 0.159 which is the same as that found elsewhere in Japan. The haplotype of the chromosome with the A gamma T gene was [-- ++ - + (+ or -) (+ or -)] at eight polymorphic sites. Data from analyses of DNA and the proportion of gamma chains in Hb F showed the existence of various kinds of gamma-globin gene arrangements; six genotypes were observed for individuals with high G gamma values and triple or quadruple gamma-globin gene arrangements, and seven genotypes for babies with low G gamma values and a single gamma-globin gene. The in vivo expression of the gamma-globin gene located at the third or fourth position in the multiple gene arrangement was found to be about 5% and 2.5% of the total, respectively. The haplotype for the chromosomes with a triple gamma-globin gene was [+ --(-)---- +], but that for the chromosomes with a single gamma-globin gene remains unclear. In addition, a new type of Bgl II polymorphism in the G gamma-globin gene was observed.

Fetal Blood↗