Respiratory impedance is correlated with airway narrowing in asthma using three-dimensional computed tomography.

BACKGROUND: Respiratory impedance comprises the resistance and reactance of the respiratory system and can provide detailed information on respiratory function. However, details of the relationship between impedance and morphological airway changes in asthma are unknown. OBJECTIVE: We aimed to evaluate the correlation between imaging-based airway changes and respiratory impedance in patients with asthma. METHODS: Respiratory impedance and spirometric data were evaluated in 72 patients with asthma and 29 reference subjects. We measured the intraluminal area (Ai) and wall thickness (WT) of third- to sixth-generation bronchi using three-dimensional computed tomographic analyses, and values were adjusted by body surface area (BSA, Ai/BSA, and WT/the square root (√) of BSA). RESULTS: Asthma patients had significantly increased respiratory impedance, decreased Ai/BSA, and increased WT/√BSA, as was the case in those without airflow limitation as assessed by spirometry. Ai/BSA was inversely correlated with respiratory resistance at 5 Hz (R5) and 20 Hz (R20). R20 had a stronger correlation with Ai/BSA than did R5. Ai/BSA was positively correlated with forced expiratory volume in 1 second/forced vital capacity ratio, percentage predicted forced expiratory volume in 1 second, and percentage predicted mid-expiratory flow. WT/√BSA had no significant correlation with spirometry or respiratory impedance. CONCLUSIONS & CLINICAL RELEVANCE: Respiratory resistance is associated with airway narrowing.

A higher incidence of cleavage failure in oocytes containing smooth endoplasmic reticulum clusters.

PURPOSE: In human oocytes, sERCs are one of the dysmorphic phenotypes that have been reported. Significantly reduced pregnancy rates and a comparatively higher number of abnormities in live births appear to be associated with the presence of sERCs in oocytes. However, some reports have shown that healthy babies can be born, without any reduced pregnancy rates, from oocytes observed to contain sERCs. Thus, the clinical and scientific significance of oocytes that harbor sERCs remains controversial. METHODS: The presence of sERCs was evaluated using a time-lapse system while studying the dynamic changes within oocytes and embryos. Logistic regression analysis was carried out to explore the independent variables for meiotic and mitotic cleavage failure.. RESULTS: The incidence of mitotic cleavage failure and the incidence of meiotic cleavage failure during the second polar body extrusion in oocytes with sERCs were found to be significantly higher than that in oocytes without sERCs. Furthermore, ICSI was found to have a greater frequency of meiotic failure than IVF. CONCLUSIONS: In cases of cleavage failure, an embryonic cell could become tetraploid and may induce abnormal chromosomal configurations. Some cells exposed to cleavage failure may become trophectoderm cells and form placental abnormalities. Even if they develop into trophectoderm cells, the ICM can be susceptible to further cleavage failure and may in turn cause further aneuploidy. For these reasons, it is important to monitor pregnancies and births derived from oocytes that contained sERCs.

Molecular evidence for multiple phylogenetic groups within two species of invasive spiny whiteflies and their parasitoid wasp.

The invasive orange spiny whitefly (OSW) Aleurocanthus spiniferus has extended its distribution to non-native areas since the early 20th century. In a similar manner, the invasive tea spiny whitefly (TSW) A. camelliae has been expanding over East Asia in recent decades. In this study, the genetic diversity of OSW and TSW and of their important parasitoid wasp Encarsia smithi was investigated in China and Japan to enable more efficient biological control policies. We detected two phylogenetic groups (haplogroups A1 and A2) in OSW and three phylogenetic groups (haplotypes B1 and B2, and haplogroup B3) in TSW in China; however, only a single haplotype was detected in each whitefly species in Japan. Based on historical records and molecular data, OSW was considered to be native to China whereas TSW has probably expanded to China from a more southern location in the last 50 years; China appears to be the source region for OSW and TSW invading Japan. In E. smithi, two phylogenetic groups were detected in Japan: haplotype I, associated with OSW, and haplogroup II mostly associated with TSW, except in two locations. These data support the hypothesis that E. smithi parasitizing TSW in Japan did not originate from the existent population parasitizing OSW but was newly imported into Japan following the invasion of its host.

Onco-testicular sperm extraction: testicular sperm extraction in azoospermic and very severely oligozoospermic cancer patients.

An increased risk of testicular cancer in men with infertility and poor semen quality has been reported. In view of the high cure rates for testicular germ cell tumours, increasing clinical importance is being placed on the protection of fertility. High-dose cytostatic therapy may be expected to cause long-term infertility. Thus, the standard procedure for fertility protection is the cryopreservation of ejaculated spermatozoa or testicular tissue before therapy. Four male patients with azoospermia and two patients with very severe oligozoospermia underwent onco-testicular sperm extraction (TESE). We attempted onco-TESE in patients with azoospermia and very severe oligozoospermia after orchiectomy. Of the patients with testicular germ cell tumours, four had spermatozoa in their testicular tissues. Sertoli cell-only syndrome was found in one patient, and one patient showed maturation arrest without the detection of spermatozoa. Three of six showed seminomatous germ cell tumour, two of six had nonseminomatous germ cell tumour and one patient showed no malignancy. Two patients achieved clinical pregnancy. Fertility challenges in men with cancer are the most straightforward because of the relative ease of obtaining and cryopreserving sperm. Testicular sperm extraction is a useful technique for obtaining spermatozoa before cytotoxic therapy in azoospermic and very severely oligozoospermic cancer patients.

Comprehensive assessment of multiple tryptophan metabolites as potential biomarkers for immune checkpoint inhibitors in patients with non-small cell lung cancer.

PURPOSE: Tryptophan metabolites have immunomodulatory functions, suggesting possible roles in cancer immunity. METHODS: Plasma tryptophan metabolites were measured using liquid chromatography/mass spectrometry before immune checkpoint inhibitors (ICIs) in patients with non-small cell lung cancer (NSCLC). RESULTS: The 19 patients with NSCLC had significantly lower levels of tryptophan (p = 0.002) and xanthurenic acid (p = 0.032), and a significantly higher level of 3-hydroxyanthranilic acid (3-HAA) (p = 0.028) compared with the 10 healthy volunteers. The patients achieving objective responses had significantly lower levels of 3-HAA than those who did not (p = 0.045). Receiver operating characteristic analyses determined that the cutoff value of 3-HAA for objective response was 35.4 pmol/mL (sensitivity: 87.5% and specificity: 83.3%). The patients with 3-HAA < 35.4 pmol/mL had significantly longer median progression-free survival (7.0 months) than those without (1.6 months, p = 0.022). CONCLUSIONS: Tryptophan metabolites may have a potential for predicting the efficacy of ICIs. REGISTRATION NUMBER: University Hospital Medical Information Network Clinical Trial Registry 000026140.

Control of actin filament length by phosphorylation of fragmin-actin complex.

Fragmin is a Ca2(+)-sensitive F-actin-severing protein purified from a slime mold, Physarum polycephalum (Hasegawa, T., S. Takahashi, H. Hayashi, and S. Hatano. 1980. Biochemistry. 19:2677-2683). It binds to G-actin to form a 1:1 fragmin/actin complex in the presence of micromolar free Ca2+. The complex nucleates actin polymerization and caps the barbed end of the short F-actin (Sugino, H., and S. Hatano. 1982. Cell Motil. 2:457-470). Subsequent removal of Ca2+, however, hardly dissociates the complex. This complex nucleates actin polymerization and caps the F-actin regardless of Ca2+ concentration. Here we report that this activity of fragmin-actin complex can be abolished by phosphorylation of actin of the complex. When crude extract from Physarum plasmodium was incubated with 5 mM ATP and 1 mM EGTA, the activities of the complex decreased to a great extent. The inactivation of the complex in the crude extract was not observed in the presence of Ca2+. In addition, the activities of the complex inactivated in the crude extract were restored under conditions suitable for phosphatase reactions. We purified factors that inactivated fragmin-actin complex from the crude extract. These factors phosphorylated actin of the complex, and the activities of the complex decreased with an increased level of phosphorylation of the complex. These factors, termed actin kinase, also inactivated the complex that capped the barbed end of short F-actin, leading to elongation of the short F-actin to long F-actin. Thus the length of F-actin can be controlled by phosphorylation of fragmin-actin complex by actin kinase.

[Pulmonary metastatic meningioma 26-years after craniotomy].

A 68-year-old male, pointed out of bilateral lung tumors, was hospitalized for the evaluation of multiple lung tumors. Chest computed tomography demonstrated 10 x 10 mm and 30 x 60 mm tumors in left lower lung and a 16 x 16 mm tumor in right lower lung. He was operated under the diagnosis of intracranial meningioma 26-years ago. For purpose of diagnosis, partial resections of left lower lung were performed, and then these tumors were diagnosed as pulmonary metastasis of intracranial meningioma. This is a very rare case of pulmonary metastasis of meningioma 26-years after craniotomy.

An elderly female who survived more than 30 years following a diagnosis of Takayasu's arteritis, complicated by fatal intestinal amyloidosis.

Compared to young patients with Takayasu's arteritis (TA), little information about elderly patients with TA has been reported. Additionally, no reports were found regarding TA cases with complications of intestinal amyloidosis. This is a case report of an elderly female, who developed intestinal amyloidosis, during late-stage TA. After years of outpatient management, she developed sudden severe dyspnea with pulmonary effusion, requiring hospitalization. After this event, betamethasone was replaced by methotrexate (MTX) for the next 34 months, but it seemed ineffective. After 1.5 years, she developed intractable diarrhea, followed by increases in BUN and serum creatinine (Cr), requiring several courses of hemodialysis. Colonoscopy revealed the presence of amyloid in her intestine, although she died of complicated sepsis caused by MRSA infection. This may be the first paper describing intestinal amyloidosis in a TA patient. Additionally, her case is rare in that she lived more than 30 years after the onset and diagnosis of TA.

The coagulation system is activated in idiopathic cardiomyopathy.

OBJECTIVES: We investigated the plasma levels of molecular markers for platelet activity and the thrombotic and fibrinolytic status in patients with hypertrophic cardiomyopathy and dilated cardiomyopathy to determine the activating site of coagulation in these disorders. BACKGROUND: A thromboembolic event is a serious complication in patients with idiopathic cardiomyopathy. However, the activating site of the coagulation system in idiopathic cardiomyopathy has not been fully investigated. METHODS: We determined the plasma levels of molecular markers for platelet activity (platelet factor 4 and beta-thromboglobulin), thrombotic status (fibrinopeptide A and thrombin-antithrombin III complex) and fibrinolytic status (D-dimer and plasmin-alpha 2-plasmin inhibitor complex) in 13 patients with hypertrophic cardiomyopathy, 17 patients with dilated cardiomyopathy and 20 normal subjects. RESULTS: Plasma levels of platelet factor 4, beta-thromboglobulin and plasmin-alpha 2-plasmin inhibitor complex did not differ significantly among the three groups, whereas plasma levels of fibrinopeptide A and thrombin-antithrombin III complex in both patient groups were significantly higher than those in normal subjects. Plasma levels of D-dimer in patients with dilated cardiomyopathy were significantly higher than those in patients with hypertrophic cardiomyopathy and normal groups. In patients with hypertrophic cardiomyopathy, both fibrinopeptide A and thrombin-antithrombin III complex levels were significantly correlated with left atrial diameter. In patients with dilated cardiomyopathy, fibrinopeptide A and thrombin-antithrombin III complex levels showed a positive correlation with left ventricular end-diastolic volume and a negative correlation with fractional shortening of the left ventricle. CONCLUSIONS: The activated coagulation system in patients with hypertrophic and dilated cardiomyopathy may be triggered by left atrial dilation in hypertrophic cardiomyopathy and left ventricular enlargement and dysfunction in dilated cardiomyopathy.

Identification of actin kinase activity in purified fragmin-actin complex.

Actin kinase phosphorylates actin of fragmin-actin complex, resulting in the inactivation of the nucleation and capping activities of the complex. Fragmin-actin complex was prepared by a new purification procedure. Incubation with ATP caused inactivation of the purified complex and phosphorylation of actin of fragmin-actin complex. The detailed analysis of the complex by SDS-gel electrophoresis showed that actin kinase was co-purified with the fragmin-actin complex. Formation of such an association between actin kinase and substrate suggests that the kinase is localized on the fragmin-actin complex to efficiently regulate actin cytoskeletons.

Ultrastructural distribution of sulfated glycosaminoglycans in epithelial-mesenchymal interface of developing rat tooth germs.

We investigated the ultrastructural distribution of sulfated glycosaminoglycans in the epithelial-mesenchymal interface of tooth germs by use of the high-iron diamine thiocarbohydrazide silver proteinate (HID-TCH-SP) staining and enzymatic digestion method. At an early stage in odontoblast differentiation, HID-TCH-SP stain deposits were sparsely distributed in the basement membrane and in the intercellular spaces. Subsequently, as formation of the initial predentin matrix began, HID-TCH-SP stain deposits were densely distributed in the interfibrillar spaces and the basement membrane. Testicular hyaluronidase digested most of those in the progenitor pre-dentin, whereas those in the region of basal lamina resisted enzymatic digestion. Testicular hyaluronidase-resistant HID-TCH-SP stain deposits were susceptible to heparitinase, indicating that the sulfated glycosaminoglycan in the basal lamina is heparan sulfate. Furthermore, the heparan sulfate tended to be regularly arranged at the sites of internal and external lamina densa. However, as progenitor pre-dentin matrix formation proceeded, the numbers of stain deposits temporarily increased and their distribution pattern became irregular, finally tending to disappear with the disruption of basal lamina.

Actin kinase: a protein kinase that phosphorylates actin of fragmin-actin complex.

Actin of fragmin-actin complex is phosphorylated by an endogenous kinase from plasmodium of Physarum polycephalum. The phosphorylation abolishes the nucleation and capping activities of fragmin-actin complex. The kinase has been purified and termed actin kinase [Furuhashi, K. & Hatano, S. (1990) J. Cell Biol. 111, 1081-1087]. Enzymatic properties of the purified actin kinase were studied in detail. Actin kinase exhibited the highest activity under conditions physiological for the plasmodium (30 mM KCl, 6 mM MgCl2, pH 7.0). The Vmax and the Km of the enzyme for ATP were about 83 mumol/min/mg and 25 microM, respectively. The Km for fragmin-actin complex was 190 nM. The purified actin kinase phosphorylated actin of fragmin-actin complex at a constant rate regardless of Ca2+ concentration. Similarly, 2 microM cAMP, 2 microM cGMP, 2 micrograms/ml calmodulin in the presence of Ca2+ or 1 mM GTP showed no effect on the activity of the purified enzyme. Actin kinase did not phosphorylate histone H1, H2B, alpha-casein, or beta-casein, suggesting that actin kinase is a new kind of protein kinase which specifically phosphorylates actin of the fragmin-actin complex.

A fragmin-like protein from plasmodium of Physarum polycephalum that severs F-actin and caps the barbed end of F-actin in a Ca2+-sensitive way.

Many protein factors regulating actin polymerization can be extracted from plasmodia of Physarum polycephalum in the presence of a high EGTA concentration (30 mM). A protein factor with the molecular weight of 60,000 (60 kDa protein) was especially interesting because of its fragmin-like properties. We purified and characterized this 60 kDa protein in the present study. The purified 60 kDa protein enhanced the initial rate of G-actin polymerization, severed F-actin, and capped the barbed end of F-actin in a Ca2+-dependent way. The threshold concentration for Ca2+ was around 10(-6) M. The flow birefringence measurement showed that the length of F-actin decreased from 2.8 to 1.0 microns depending on the concentration of 60 kDa protein added to F-actin. These properties were identical to those of fragmin (Mr 42,000) isolated from plasmodia (Hasegawa et al. (1980) Biochemistry 19, 2677-2683). However, the molecular weight, the tryptic peptide map, and the cross-reactivities with polyclonal anti-fragmin antibodies were different from those of fragmin. We concluded from these results that 60 kDa protein is a new Ca2+-sensitive F-actin-severing protein. Considering its similarity to fragmin, we termed the 60 kDa protein fragmin 60.

Characterization of histamine release in digitonin-permeabilized rabbit platelets.

To manipulate the intracellular milieu of rabbit platelets, permeabilization was performed using digitonin. Permeabilized platelets showed dose-dependent release of histamine, which was stored in granules of rabbit platelets, in response to extracellular calcium ion. As PMA stimulated the release reaction in digitonin-permeabilized platelets, the protein kinase C system, which regulates metabolic processes and cell reactions in intact platelets, was revealed to be working. Cupric phenanthroline also released histamine from permeabilized rabbit platelets dose-dependently, and dithiothreitol inhibited the release strongly. Since cupric phenanthroline is a mild oxidant which catalyzes the formation of disulfide bridges, as in the case of Ca2+-ATPase of sarcoplasmic reticulum, the results suggested that protein cross-linking is implicated in the regulation of the release reaction in permeabilized rabbit platelets.

Ouabain enhances nitric oxide synthesis in rat vascular smooth muscle cells induced by interleukin-1 beta.

Incubation of cultured rat vascular smooth muscle cells with interleukin-1 beta caused a significant increase in the production of nitrite, a stable metabolite of nitric oxide (NO), in time- and dose-dependent manners. Addition of ouabain to the culture further enhanced interleukin-1 beta-induced nitrite production. Similarly, interleukin-1 beta produced a significant increase in the cellular level of guanosine 3',5'-cyclic monophosphate, and the increase was significantly enhanced by coincubation with ouabain. The calcium ionophore ionomycin also significantly enhanced interleukin-1 beta-induced nitrite generation. These findings indicate that ouabain enhances NO synthesis in vascular smooth muscle cells induced by interleukin-1 beta, presumably through an increase in intracellular calcium ion concentrations.

Calcium distribution in true odontoblasts of the fish Hoplognathus fasciatus at dentine mineralization stage.

Ultrastructural localization of calcium was investigated using the potassium pyroantimonate technique. The calcium distribution pattern in true odontoblasts differed from that of odontoblasts of mammals and was similar to that of mammalian osteoblasts.

Construction of an autonomously replicating plasmid in n-alkane-assimilating yeast, Candida tropicalis.

A transformation system using the autonomously replicating plasmid in the n-alkane-assimilating and asporogenic diploid yeast, Candida tropicalis, was developed. For the cloning of a DNA fragment containing a potential autonomously replicating sequence (ARS) from the genomic DNA of C. tropicalis, the ura3 mutant obtained using ethylmethane sulfonate as the host and the URA3 gene amplified by PCR using the C. tropicalis genomic DNA as a selectable marker were prepared. Comparison of ARSs among yeasts revealed that the consensus sequence found in S. cerevisiae was also present in C. tropicalis. The autonomously replicating plasmid containing the putative ARS as the shuttle vector, capable of replicating in both E. coli and C. tropicalis, was first constructed. The transformation system using this plasmid, in addition to the integrative transformation system, will be applicable to genetic studies of C. tropicalis.

Multivariate evaluation of factors affecting recurrence, progression, and survival in patients with superficial bladder cancer treated with intravesical bacillus Calmette-Guérin (Tokyo 172 strain) therapy: significance of concomitant carcinoma in situ.

To evaluate the relative importance of clinicopathological factors affecting recurrence, progression, and survival in patients with superficial bladder cancer (pTa and pT1) undergoing bacillus Calmette-Guerin (BCG) therapy (Tokyo 172 strain), we reviewed data for 146 patients treated between 1985 and 1998. The median follow-up period was 64.7 months. Tumour recurrence, progression, and death were evaluated as endpoints using Cox's proportional hazards model. The 5-year recurrence-free rate was 56% for all 146 patients. Those with a past history of bladder cancer (n = 73) had significantly earlier recurrence than those without (n = 73, p = 0.017) and this tended to be the case for concomitant CIS (n = 34) although this did not reach statistical significance. The 5-year progression rate was 15% for all 146 patients and univariate analysis revealed that the presence of concomitant CIS was significantly associated with disease progression (p = 0.002). Multivariate analysis using the proportional hazards model confirmed the finding that only one factor, concomitant CIS, was significantly associated with progression. The 5-year survival rate was 84% for all 146 patients. Furthermore, univariate and multivariate analyses revealed that patient age, history of bladder cancer, and concomitant CIS were variables significantly related to patient survival. The present findings suggest that careful follow-up is mandatory after BCG instillation therapy for patients with superficial bladder cancer and concomitant CIS because of their relatively poor prognosis.

[The effect of prostaglandin E1 on body temperature, catecholamines and stress hormones during prolonged surgery].

The effects of prostaglandin E1 (PGE1) on body temperature, catecholamines and stress hormones were evaluated in 10 patients undergoing elective prolonged surgery over 12 hours. PGE1 (0.03 microgram.kg-1.min-1) was administered in 5 patients and was not administered in 5 patients. Deep skin-surface temperature gradients were 5.1 +/- 2.3 degrees C in PGE1 non-administered group and 0.8 +/- 0.9 degree C in PGE1 administered group (P < 0.05). Pharyngeal-skin surface temperature gradients were 8.8 +/- 2.1 degrees C in PGE1 non-administered group and 1.5 +/- 1.5 degrees C in PGE1 administered group (P < 0.05). There were no significant differences between the two groups in respects to catecholamines, stress hormones, lactate level and blood sugar. PGE1 0.03 microgram.kg-1.min-1 is effective in maintaining peripheral circulation without causing body temperature changes during prolonged surgery.

[An elderly case of ruptured aortic arch aneurysm with hemorrhagic cardiac tamponade].

We reported a case of successful aortic arch replacement using selective cerebral perfusion for ruptured distal aortic arch aneurysm (DAAA) with cardiac tamponade. A 80-year-old man who had preoperative episode of severe chest pain. Computed tomography showed saccular DAAA and pericardial effusion. He was diagnosed as ruptured DAAA with hemorrhagic cardiac tamponade. We performed urgent graft replacement of the aortic arch using selective cerebral perfusion. Postoperatively he had no complication. Thirty days after the operation he was discharged from the hospital and he is now leading a normal life.