Search PubMed⌕ Search

Biomedical subjects

H Ueyama

Publications and source records attributed to H Ueyama.

At least 109 records · Page 6Linked to original sources
PubMed1991

Respiratory outcome in extremely premature infants following ketamine anaesthesia.

Premature infants are prone to develop postoperative apnoea. The purpose of the present study was to determine if risk factors could be identified to predict which patients would require postoperative tracheal intubation and lung ventilation. Twenty-five extremely premature infants (birth weight: 811 +/- 242 g (mean +/- SD) and operation weight: 1585 +/- 394 g) needing cryotherapy for retinopathy were studied. After surgery the tracheas were extubated if there was no prolonged apnoea, SaO2 greater than 85%, and heart rate greater than 120 bpm. In eight, tracheal extubation in the operating room was unsuccessful. Using multivariate discriminant analysis, four risk factors correlated with the need for pulmonary ventilation-gestational duration, birth weight, postconceptional age, and preoperative aminophylline treatment for seven days. A scoring system using these factors successfully predicted the need for a tracheal tube after surgery in 92% of patients. It is concluded that the system may be clinically useful in the perioperative care of low-birth-weight infants as it identifies important variables for evaluating postoperative prolonged apnoea.

Age Factors↗
PubMed1991

Inhibitory effects of licochalcone A isolated from Glycyrrhiza inflata root on inflammatory ear edema and tumour promotion in mice.

Licochalcone A, 3-a,a-dimethylallyl-4,4'-dihydroxy-6-methoxychalcone, from the root of Glycyrrhiza inflata Beta (Leguminosae) (Xin-jiang liquorice) showed anti-inflammatory action towards mouse ear edema induced by arachidonic acid (AA) and 12-O-tetradecanoylphorbol 13-acetate (TPA) by topical application. Anti-tumour promoting action of licochalcone A was also observed in vivo for mouse skin papilloma initiated by dimethylbenz[a]anthracene (DMBA) and promoted by TPA. It inhibited in vitro 32Pi-incorporation to phospholipids in HeLa cells promoted by TPA. A competitive interaction of licochalcone A with the TPA-receptors in the cell membrane has been suggested.

Animals↗
PubMed1991

Structure, chromosome location, and expression of the human smooth muscle (enteric type) gamma-actin gene: evolution of six human actin genes.

Recombinant phages that carry the human smooth muscle (enteric type) gamma-actin gene were isolated from human genomic DNA libraries. The amino acid sequence deduced from the nucleotide sequence matches those of cDNAs but differs from the protein sequence previously reported at one amino acid position, codon 359. The gene containing one 5' untranslated exon and eight coding exons extends for 27 kb on human chromosome 2. The intron between codons 84 and 85 (site 3) is unique to the two smooth muscle actin genes. In the 5' flanking region, there are several CArG boxes and E boxes, which are regulatory elements in some muscle-specific genes. Hybridization with the 3' untranslated region, which is specific for the human smooth muscle gamma-actin gene, suggests the single gene in the human genome and specific expressions in enteric and aortic tissues. From characterized molecular structures of the six human actin isoform genes, we propose a hypothesis of evolutionary pathway of the actin gene family. A presumed ancestral actin gene had introns at least sites 1, 2, and 4 through 8. Cytoplasmic actin genes may have directly evolved from it through loss of introns at sites 5 and 6. However, through duplication of the ancestral actin gene with substitutions of many amino acids, a prototype of muscle actin genes had been created. Subsequently, striated muscle actin and smooth muscle actin genes may have evolved from this prototype by loss of an intron at site 4 and acquisition of a new intron at site 3, respectively.

Actins↗
PubMed1991

[A resected case of renal cell carcinoma with metastasis to pancreas].

We report a case of renal cell carcinoma with metastasis to the pancreas, treated by radical nephrectomy and total pancreatectomy. A 56-year-old man visited our hospital because of macrohematuria and right low backache. An intravenous pyelography, ultrasonography and a CT scan of the abdomen revealed right renal tumor at the upper portion, about 11 cm in diameter, but no abnormal findings of the pancreas. Aortic and celiac angiograms demonstrated multifocal lesions, 1 or 2 cm in size, compatible with a metastatic tumor in the region of the pancreas. The patient underwent right radical nephrectomy and open biopsy of the pancreas. The right renal tumor was histologically revealed to be renal cell carcinoma without nodal or venous extension. Histological examination of the pancreas biopsy specimen confirmed it to be a renal cell carcinoma metastatic to the pancreas. Therefore, he underwent total pancreatectomy 1 month after the previous surgery. Three months after the second surgery, a CT scan of the brain revealed metastasis to the pituitary gland. He is still under therapy.

Carcinoma, Renal Cell↗
PubMed1991

[Human neuroblastoma cell lines having smooth muscle cell markers].

The neural crest gives rise to a variety of tissues, including peripheral neurons, Schwann cells, melanocytes and ectomesenchymal cells, which include the smooth muscle cells of large arteries. Cell lines derived from neuroblastoma (a neural crest tumor) have at least two distinct morphological cell types, a neuroblastic phenotype (N-type) and an epithelial-like phenotype (S-type) with characteristics of substrate-adhesiveness. We have analyzed 17 human neuroblastoma cell lines using a panel of monoclonal antibodies against cytoskeletal proteins. Three neuroblastoma cell lines (KP-N-SI, KP-N-YN and SMS-KCN) bound an alpha -smooth muscle actin antibody. In addition, one of these cell lines (KP-N-SI) bound anti-desmin monoclonal antibodies as determined by indirect immunofluorescence. A total of eight cloned cell lines were obtained from the above parent cell lines. These were composed of either N- or S-type cells and were confirmed to be the common neuroblastoma origin from each parent cell line by chromosomal analysis. Alpha-smooth muscle actin and desmin were demonstrated in the S-type cloned cells by indirect immunofluorescence, as well as by two-dimensional Western blot analysis. These results were confirmed by Northern blot analysis using a specific probe (pSH alpha SMA-3'UT) to human alpha-smooth muscle actin mRNA. This is the first report of the presence of alpha-smooth muscle actin and desmin in neuroblastoma cell lines. These data show that in addition to giving rise to cells with neural, Schwann cell and melanocyte markers, neuroblastoma can also give rise to the cells expressing smooth muscle cell markers.

Actins↗
PubMed1991

[A case of adult-onset tethered cord syndrome accompanied with slowly progressive muscular atrophy in the lower limbs].

A 70-year-old man developed slowly progressive muscular atrophy in the lower limbs from age 28, followed by urinary disturbance from age 40. Neurological examination revealed bilateral severe muscular atrophy in the lower limbs with hypesthesia and hypalgesia, mild muscle wasting of both hands, urinary incontinence, and constipation. A sacral dimple was also recognized. A diagnosis of tethered cord syndrome with thick filum terminale was made by spinal magnetic resonance imaging (MRI). After the operation for untethering, urinary disturbance has been slightly improved. Although the adult-onset tethered cord syndrome with the thick filum terminale was extremely rare, the presence of congenital dermal abnormality and segmental distribution of the muscular involvement is often helpful for the clinical diagnosis of this disease. Spinal MRI is one of the most diagnostic method for this disease.

Aged↗
PubMed1991

[A case of pelvic lipomatosis].

This is a report of the fifth case of pelvic lipomatosis in Japan. A 52-year-old man presented himself in our hospital with a complaint of left lower abdominal pain on August 28, 1988. At that time, physical examination was unremarkable with the exception of mild obesity. The excretory urogram and retrograde pyelogram revealed left hydroureteronephrosis with tapering of the left lower ureter. Urethrocystogram showed an elongated posterior urethra with anterior displacement and elevation of the bladder. Computed tomography revealed excess of diffuse fatty tissue in the pelvic space with bladder deformity and rectal compression. Pelvic arteriogram demonstrated no neovascularity. A diagnosis of pelvic lipomatosis was established. He lost 6 kg by diet therapy. Left lower abdominal pain disappeared, but excretory urogram after eight months showed no changes.

Humans↗
PubMed1991

[A case of emphysematous cystitis with familial amyloidosis].

This is a report of the thirteenth known case in Japan of emphysematous cystitis. A 70-year-old man visited our hospital because of pollakisuria and macrohematuria on November 21, 1989. The patient had been known to have familiar amyloid polyneuropathy for the previous 3 years. Urinalysis showed marked hematopyuria. The residual urine was 216 cc, and urine cultures yielded 10,000,000 colonies of Escherichia coli per ml. Laboratory studies revealed systemic inflammatory findings, but no diabetic change. A plain X-ray film of the abdomen and an excretory urogram (DIP) showed small linear and round gas collections in the bladder shadow. A CT scan revealed multiple gas locules within the bladder wall. A diagnosis of emphysematous cystitis was established. The patient was given antibiotics, and there was striking clinical improvement. Histological examination of the endoscopically obtained biopsy specimen of the bladder revealed amyloidosis. We believe that this patient had a cystitis emphysematosa precipitated neurogenic bladder due to amyloid polyneuropathy and amyloidosis of the bladder.

Aged↗
PubMed1991

[Anesthesia for cesarean section in patients with fetal anomaly].

Twenty-two cases of Cesarean section due to fetal anomaly diagnosed prenatally were reviewed in terms of the anesthetic managements. In 6 cases, diazepam 0.3 mg.kg-1, which provides fetal anesthesia for surgery scheduled immediately after birth, was administered intravenously to the mothers with/without fentanyl (2 general anesthesia and 4 regional anesthesia). The diagnosis of their fetuses was congenital diaphragmatic hernia, congenital cystic adenomatoid malformation of the lung, gastroschisis or omphalocele. No fetal anesthesia was performed in the other 16 cases (15 spinal anesthesia and 1 general anesthesia). Seven of their fetuses were diagnosed as hydrops. Since the general condition of the diseased newborn is known to be deteriorated after receiving various stress and aerophagia, fetal anesthesia in Cesarean delivery has the advantage of stress reduction and prevention of aerophagia. When the newborn is considered to need immediate neonatal resuscitation or intensive care including surgery, fetal anesthesia may be a choice of anesthetic technique.

Anesthesia, Obstetrical↗
PubMed1991

[Chemical burn caused by povidone-iodine].

Povidone-iodine (PVP-I) is a widely used antiseptic because of its low toxicity and high germicidal effect. A one-year-old boy who had undergone Nissen's fundoplication developed a chemical burn on his back postoperatively. The lesion was exposed to the surgical sheet immersed with a large amount of 10% PVP-I solution for 4 hours. Patch test with PVP-I (small aluminum chamber keeps a wet paper with PVP-I) revealed positive response in the patient. The same patch tests were performed in 17 volunteers. Sixteen subjects showed positive and one negative, while direct painting of a small quantity of PVP-I on skin without the chamber produced negative responses. This may indicate that prolonged exposure to wet PVP-I is harmful. It is important to use PVP-I carefully for the prevention of contact dermatitis.

Burns, Chemical↗
PubMed1990

Antithrombin III Kumamoto: identification of a point mutation and genotype analysis of the family.

We previously reported a variant antithrombin III (AT III Kumamoto) associated with a 31-year-old female who suffered from recurrent thrombotic episodes. To define the molecular basis for the variant AT III, we used a combination of genomic amplification followed by cloning, sequencing, and hybridization with allele-specific oligonucleotide probes. We obtained evidence for a cytosine to thymine transition in exon 2 (codon 47) of the AT III gene in the proband. This mutation converts arginine 47 to cysteine. Oligonucleotide hybridization procedures were used for confirmation of the mutation and for genotype analysis of the family members.

Adult↗
PubMed1990

Assignment of the vascular smooth muscle actin gene ACTSA to human chromosome 10.

Human vascular smooth muscle actin gene (ACTSA) was cloned and its unique sequence was used as the hybridization probe for Southern blot analysis of DNAs from 18 rodent-human somatic cell hybrids; the gene was assigned to human chromosome 10. Regional mapping by in situ hybridization showed that the gene is located on the long arm (q22-q24) of the chromosome. Thus, the gene is on a different chromosome from the other four actin genes so far examined.

Actins↗
PubMed1990

A new method for extracting DNA or RNA for polymerase chain reaction.

The use of glass powder suspension for the extraction of RNA or DNA was studied to simplify the procedures of polymerase chain reaction (PCR). Using this procedure, proviral DNA of human T-lymphotropic virus type-1 (HTLV-1) in the blood of an asymptomatic virus carrier and viral RNA of human immunodeficiency virus (HIV) in the blood of an AIDS patient were easily detected by PCR employing glass powder. The use of glass powder is a simple and highly efficient procedure for the extraction of DNA or RNA, and can be applied for routine PCR.

Acquired Immunodeficiency Syndrome↗
PubMed1990

Anti-tumor-promoting activity of derivatives of abieslactone, a natural triterpenoid isolated from several Abies genus.

Abiesenonic acid methyl ester (AVB-I acid methyl ester), a triterpenoid compound prepared from abieslactone, suppressed tumor promoter-induced phenomena in vitro and in vivo; i.e., AVB-I acid methyl ester inhibited 12-o-tetradecanoylphorbol-13-acetate (TPA)-stimulated 32Pi-incorporation into phospholipids of cultured cells and the promoting action of TPA on skin tumor formation in mice initiated with 7,12-dimethylbenz[a]anthracene.

Animals↗