Long-term outcomes and recurrence-free interval after the treatment of keloids with a standardized protocol.

BACKGROUND: Recurrence rates of keloids have generally been reported at one time point. However, the longer the duration after treatment, the greater the likelihood that such lesions will recur. In this study, we analysed the time to recurrence during long-term follow-up. MATERIAL AND METHODS: We retrospectively reviewed recurrence-free interval in 52 patients with keloid (age 8-79 years) who had been treated between June 2006 and January 2011 using a standardised protocol developed by our group. RESULTS: Mean duration of follow-up was 37.5 (range, 7-120) months in patients with keloid. Kaplan-Meier survival curves revealed a statistically significant difference in recurrence-free interval between ear keloids and keloids excluding ear keloids. Recurrence rate for keloids was high in the first 2 years after treatment. CONCLUSIONS: Kaplan-Meier analysis was useful for understanding the tendency of recurrence of keloids after treatment using a standardised protocol.

Assessment of maxillary sinus fluid volume for postmortem diagnosis of drowning.

INTRODUCTION: Drowning is a comprehensive and exclusive diagnosis at autopsy. Autopsy findings such as pleural effusion and waterlogged lungs contribute to the diagnosis. Herein, we aim to reveal the practical usefulness and postmortem changes of the maxillary sinus fluid volume to diagnose drowning. METHODS: We evaluated 52 drowning and 59 nondrowning cases. The maxillary sinus fluid volume was measured using a computed tomography (CT) scan, and pleural effusion volume and lung weight were manually measured at autopsy. The utility of these three indices for diagnosing drowning and its postmortem changes was evaluated. RESULTS: The maxillary sinus fluid volume was significantly higher in drowning cases than in other external causes and cardiovascular death cases. Receiver operating characteristic curve analysis revealed that a total maxillary sinus fluid volume >1.04 mL more usefully indicated drowning (odds ratio, 8.19) than a total pleural effusion volume >175 mL (odds ratio, 7.23) and a total lung weight >829 g (odds ratio, 2.29). The combination of maxillary sinus fluid volume and pleural effusion volume more effectively predicted drowning than one index alone. Moreover, the maxillary sinus fluid volume was less influenced by the postmortem interval than the other two indices up to a week after death. CONCLUSION: Maxillary sinus fluid volume can be more useful than pleural effusion volume and lung weight with higher sensitivity and odds ratio for diagnosing drowning. IMPLICATIONS FOR PRACTICE: Fluid accumulation in both the maxillary sinuses strongly predicts drowning in the postmortem imaging.

Psychological stress during in vitro fertilization and embryo transfer is influenced by the patients' background and gender.

Purpose: This study evaluated the changes in psychological stress during in vitro fertilization and embryo transfer (IVF-ET) and the relationship of such stress to the patients' background and gender. Methods: Sixty couples undergoing IVF-ET were administered the State-Trait Anxiety Inventory-JYZ (STAI) test at six different points during IVF-ET procedures. Anxiety scores at each time point were recorded and analyzed according to gender, fertility status, and duration of treatment. Results: The median state anxiety score for women increased following induction until oocyte collection, after which it temporarily declined and then increased again until the pregnancy test. No such changes were noted in men. Scores for women who had undergone a shorter period of IVF treatments were higher while state and trait anxiety in men increased with a prolonged treatment period. Unsuccessful treatment increased the state and trait anxiety of women. Conclusions: Psychological stress changed periodically depending on the duration of the patients' treatment and fertility status also influenced anxiety levels. These findings will prove helpful in guiding psychological therapy and counseling for couples attempting to conceive by in vitro fertilization.

Differences in odor identification among clinical subtypes of Parkinson's disease.

OBJECTIVE: Olfactory dysfunction is a non-motor symptom in idiopathic Parkinson's disease (PD). We investigated whether this dysfunction differs among clinical subtypes of PD. METHODS: Participants comprised of 90 patients with idiopathic PD and without dementia. Olfactory function was evaluated using the odor stick identification test for Japanese, which evaluated the detection of 12 odorants familiar to Japanese participants. Patients were divided into tremor-dominant type (TDT), akinetic-rigid type (ART), and mixed type (MXT) PD subgroups using part III of the Unified Parkinson's Disease Rating Scale. RESULTS: Fifty-five patients were classified as ART, 21 as MXT, and 14 as TDT. There were no differences in age, sex, or duration of illness among the subtypes. Subjective symptoms of impaired sense of smell were significantly higher (P<0.05) in the ART than in the TDT. Mean odor identification score was 4.3 in the ART, 5.2 in MXT, and 6.6 in TDT. It was significantly lower in the ART than in the TDT (P<0.01). CONCLUSION: Olfactory dysfunction differed among the clinical subtypes of PD. This suggests that olfactory function might relate to prognosis of patients with PD.

The ABC transporter Bcrp1/ABCG2 is expressed in a wide variety of stem cells and is a molecular determinant of the side-population phenotype.

Stem cells from bone marrow, skeletal muscle and possibly other tissues can be identified by the 'side-population' (SP) phenotype. Although it has been assumed that expression of ABC transporters is responsible for this phenotype, the specific molecules involved have not been defined. Here we show that expression of the Bcrp1 (also known as Abcg2 murine/ABCG2 human) gene is a conserved feature of stem cells from a wide variety of sources. Bcrp1 mRNA was expressed at high levels in primitive murine hematopoietic stem cells, and was sharply downregulated with differentiation. Enforced expression of the ABCG2 cDNA directly conferred the SP phenotype to bone-marrow cells and caused a reduction in maturing progeny both in vitro and in transplantation-based assays. These results show that expression of the Bcrp1/ABCG2 gene is an important determinant of the SP phenotype, and that it might serve as a marker for stem cells from various sources.

Molecular characterization of quinolone resistance-determining regions and their correlation with serotypes and genotypes among Streptococcus pneumoniae isolates in Japan.

We established the distribution of amino acid alterations in quinolone resistance-determining regions (QRDRs) of Streptococcus pneumoniae isolates in Japan and described the correlation of these alterations with serotypes determined by multilocus sequencing typing. Among 141 S. pneumoniae isolates, five levofloxacin-resistant isolates harbored mutations in both gyrA and parC and/or parE and were clonally unrelated. Among 136 levofloxacin-susceptible isolates, one isolate (MIC = 2 mg/l) had a first-step parC mutation at Asp78. Twenty isolates had Lys137Asp in parC and Ile460Val in parE and contained nine serotypes and eight clonal complexes (CCs), including all eight Colombia(23F)-26 (CC138) isolates. Eighty-one isolates had Ile460Val in parE alone and contained 14 serotypes and 16 CCs, including 36 of 37 Netherlands(3)-31 (CC180) isolates and all 22 Taiwan(19F)-14 (CC271) isolates. In contrast, seven of ten Taiwan(23F)-15 (CC242) isolates were wild-type. Although each QRDR genotype contained various serotypes and CCs, prevalent clones were mostly associated with a single QRDR genotype.

Disruption of endothelial tight junctions in a patient with mitochondrial encephalomyopathy, lactic acidosis and stroke-like episodes (MELAS).

An electron microscopic study revealed disruption of capillary endothelial tight junctions (TJs) in both biopsied muscle, taken at 5 years and 1 month of age, and the autopsied brain, taken at 13 years and 6 months of age, in a patient with mitochondrial encephalomyopathy, lactic acidosis and stroke-like episodes (MELAS) and mitochondrial DNA (mtDNA) point mutation A3243G. This endothelial barrier disruption might result in vasogenic edema and systemic lactic acidosis, possibly the critical pathology of MELAS.

Long-term lymphohematopoietic reconstitution by a single CD34-low/negative hematopoietic stem cell.

Hematopoietic stem cells (HSCs) supply all blood cells throughout life by making use of their self-renewal and multilineage differentiation capabilities. A monoclonal antibody raised to the mouse homolog of CD34 (mCD34) was used to purify mouse HSCs to near homogeneity. Unlike in humans, primitive adult mouse bone marrow HSCs were detected in the mCD34 low to negative fraction. Injection of a single mCD34(lo/-), c-Kit+, Sca-1(+), lineage markers negative (Lin-) cell resulted in long-term reconstitution of the lymphohematopoietic system in 21 percent of recipients. Thus, the purified HSC population should enable analysis of the self-renewal and multilineage differentiation of individual HSCs.

Instrumental neutron activation analyses of lunar specimens.

Ten Apollo 11 specimnens were divided into 24 samtples. Sodillim contents of 8 diverse specimens clluster tightly abolit 0.3 percent. Plagioclase separated from sample 10044 contains aboltt 1.09 percent Na; barium is not enriched in the plagioclase separate. Contents of the rare earths are strikingly high, and relative abtmndances resemble those of calcium-rich achondrites or abyssal basalts but are depleted in Eu by factors of 2 to 3 and in La by about 20 percent. The plagioclase separate is enriched in Eu and pyroxenes (and opaqtte minerals are Eu-depleted. Fine fractions of 10044 are abotit 20 to 40 percent richer in most rare earths (50 percent for Eu) than coarse fractions, probably becaitse of the presence of small grains in which rare earths are mnarkedly concentrated. "Microgabbro" 10045 is imnpoverished, relative to the soil, in rare eartlhs and Hf. Ratios by mass of Zr to Hf are comlparatively low. Abttndances of Mn, Co, Fe, Sc and Cr stiggest systematic differences between igneous rocks on one hanid and breccias and "soil" on the other. Fromn the Co abuindances, no more than about 3 percent of the present "soil" can consist of chondritic mleteorite conitamination.

Exposure-Response Analysis for Efficacy of Daclatasvir, Asunaprevir, and Beclabuvir Combinations in HCV-Infected Patients.

The combination regimen of daclatasvir, asunaprevir, and beclabuvir (3DAA regimen) was developed as a fixed-dose combination for the treatment of hepatitis C virus (HCV) infection in Japan. The objectives of this analysis were to characterize the relationship between drug exposure and sustained virologic response at posttreatment week 12 (SVR12) in HCV-infected subjects and to evaluate the impact of demographic covariates and clinical factors on the exposure-response (E-R) relationship. The E-R efficacy analysis was performed with data from phase 2 and phase 3 studies in HCV-infected subjects treated with the 3DAA regimen. The relationship between the probability of achieving SVR12 and exposure to daclatasvir, asunaprevir, and beclabuvir was described using a logistic regression model and included assessments of the potential covariate effects. The impacts of the covariates on the rate of SVR12 and interactions of covariates with the individual drug effects were tested. The final model for SVR12 included effects of non-genotype-1a status, resistance-associated NS5A-Q30 substitution in genotype-1a subjects, and baseline RNA level on the intercept, and effect of prior peg-interferon failure on the beclabuvir slope. Sex, race, age, weight, fibrosis score, alanine transaminase, and cirrhosis status had no statistically significant impact on the rate of SVR12. The individual E-R relationships with each drug, were relatively flat, and the effects of exposure were not significant. With the exception of the NS5A-Q30 substitution in genotype-1a subjects, statistically significant covariate effects had little impact on SVR12 rates. Overall, the E-R model was developed that captured the high SVR12 rates and the effect of covariates for the 3DAA regimen in HCV-infected patients.

Characteristics of neurons and glia in the brain of Fukuyama type congenital muscular dystrophy.

Fukuyama type congenital muscular dystrophy accompanies central nervous system and ocular lesions. Morphological findings suggest that major central nervous system lesions, such as cortical dysplasia, are caused by the abnormal glia limitans due to an impairment of astrocytes. Increase of corpora amylacea and neurofibrillary tangles suggests acceleration of the aging process in the Fukuyama type congenital muscular dystrophy brain. Glycosylation of alpha-dystroglycan is decreased in the central nervous system of Fukuyama type congenital muscular dystrophy in a similar manner to the skeletal muscle, but dystroglycan mRNA levels appear to be increased. Glycosylated alpha-dystroglycan is reduced in the glia limitans formed by astrocytic endfeet. Slight accumulation of N(epsilon)-(carboxymethyl)lysine, an oxidative modification product, is observed in astrocytes of Fukuyama type congenital muscular dystrophy and in an astrocytoma cell line with suppressed fukutin expression. Cerebral cortical neurons of Fukuyama type congenital muscular dystrophy and controls react with an antibody for core alpha-dystroglycan but not with an antibody for glycosylated alpha-dystroglycan. Carboxymethyl lysine is accumulated in cortical neurons of a severe case of Fukuyama type congenital muscular dystrophy. Both astrocytes and neurons appear to be sensitive to oxidative stress when fukutin is suppressed. However, it is still unclear how the loss of fukutin causes astrocytic and neuronal dysfunction. Since the central nervous system is composed of several components that are closely related to each other, more investigations are needed for thorough understanding of the Fukuyama type congenital muscular dystrophy brain. Moreover, since astrocytes and epithelial cells may show different cellular responses to fukutin suppression, it seems important to evaluate the functions of fukutin in each type of cell or tissue, not only to prove the pathogenesis of Fukuyama type congenital muscular dystrophy, but also for applying appropriate therapies, especially those at molecular level.

GIT1 mediates thrombin signaling in endothelial cells: role in turnover of RhoA-type focal adhesions.

Thrombin mediates changes in endothelial barrier function and increases endothelial permeability. A feature of thrombin-enhanced endothelial hyperpermeability is contraction of endothelial cells (ECs), accompanied by formation of focal adhesions (FAs). Recently, a G protein-coupled receptor kinase-interacting protein, GIT1, was shown to regulate FA disassembly. We hypothesized that GIT1 modulates thrombin-induced changes in FAs. In human umbilical vein ECs (HUVECs), thrombin recruited GIT1 to FAs, where GIT1 colocalized with FAK and vinculin. Recruitment of GIT1 to FAs was dependent on activation of the small GTPase RhoA, and Rho kinase, as demonstrated by adenoviral transfection of dominant-negative RhoA and treatment with Y-27632. Thrombin stimulated GIT1 tyrosine phosphorylation with a time course similar to FAK phosphorylation in a Rho kinase- and Src-dependent manner. Depletion of GIT1 with antisense GIT1 oligonucleotides had no effect on basal cell morphology, but increased cell rounding and contraction of HUVECs, increased FA formation, and increased FAK tyrosine phosphorylation in response to thrombin, concomitant with increased endothelial hyperpermeability. These data identify GIT1 as a novel mediator in agonist-dependent signaling in ECs, demonstrate that GIT1 is involved in cell shape changes, and suggest a role for GIT1 as a negative feedback regulator that augments recovery of cell contraction.

Painful neuropathy with trigeminal nerve involvement in type 2 diabetes.

After several years of treatment for type 2 diabetes mellitus, a 69-year-old Japanese man developed an acute painful neuropathy, characterized by bilateral causalgia and dysaesthesia in his cheeks and around his eyes, typically 30 min to 3 h after meals. As his glycaemic control deteriorated, his haemoglobin (Hb) A1c level gradually increased from 7 - 8% to 10.3% and his symptoms became more severe. The pain radiated out along the distribution of the ophthalmic and maxillary divisions of the trigeminal nerve. The patient was treated with insulin therapy and his HbA1c level decreased from 10.3% to 6.8% within 7 months. Five months after initiating insulin therapy, his symptoms showed a dramatic improvement. This was a very unusual case of bilateral acute painful neuropathy that involved the ophthalmic and maxillary divisions of the trigeminal nerve, and in which aggravation of the symptoms clearly related to poor glycaemic control.

What is a stem cell niche?

Niche has become the most important issue in stem cell biology, but it is still a hypothetical notion that cannot be defined in a better way than the microenvironment surrounding stem cells. Using a melanocyte stem cell system as a model, we have analyzed the cellular and molecular requirements for differentiation of quiescent stem cells. Our results demonstrate the multiple subsets within the stem cell compartment and thus suggests the complexity of niche.

JTB: a novel membrane protein gene at 1q21 rearranged in a jumping translocation.

1q21 is frequently involved in different types of translocation in many types of cancers. Jumping translocation (JT) is an unbalanced translocation that comprises amplified chromosomal segments jumping to various telomeres. In this study, we identified a novel gene human JTB (Jumping Translocation Breakpoint) at 1q21, which fused with the telomeric repeats of acceptor telomeres in a case of JT. hJTB (human JTB) encodes a trans-membrane protein that is highly conserved among divergent eukaryotic species. JT results in a hJTB truncation, which potentially produces an hJTB product devoid of the trans-membrane domain. hJTB is located in a gene-rich region at 1q21, called EDC (Epidermal Differentiation Complex). This is the first report identifying the gene involved in unbalanced translocations at 1q21.

Binding of a monoclonal antibody E12 to Gc globulin (vitamin D-binding protein) is inhibited by actin.

A monoclonal antibody, E12, to human Gc globulin was raised in murine somatic cell using purified Gc. The antibody was subtyped IgG2b kappa and had a kd of 3.0 x 10(-8) M for antigen Gc. Monospecificity for Gc was demonstrated by Western blotting of normal human serum using nondenaturing polyacrylamide gel electrophoresis. As judged by ELISA, actin inhibited binding of E12 to Gc in dose-dependent fashion. Affinity chromatography studies further showed that ternary complexes of actin-Gc-E12 were not formed, and actin displaced Gc from Gc-E12 complexes. Proteolytic digestion of Gc with trypsin showed that the monoclonal antibody E12 reacted with the major 30-kDa tryptic fragment containing the amino terminal fragment of Gc, but actin did not react with this fragment. These results indicate that interaction of actin with Gc causes conformational changes which inhibit binding of E12.

Target-induced conformational adaptation of calmodulin revealed by the crystal structure of a complex with nematode Ca(2+)/calmodulin-dependent kinase kinase peptide.

Calmodulin (CaM) is a ubiquitous calcium (Ca(2+)) sensor which binds and regulates protein serine/threonine kinases along with many other proteins in a Ca(2+)-dependent manner. For this multi-functionality, conformational plasticity is essential; however, the nature and magnitude of CaM's plasticity still remains largely undetermined. Here, we present the 1.8 A resolution crystal structure of Ca(2+)/CaM, complexed with the 27-residue synthetic peptide corresponding to the CaM-binding domain of the nematode Caenorhabditis elegans Ca(2+)/CaM-dependent kinase kinase (CaMKK). The peptide bound in this crystal structure is a homologue of the previously NMR-derived complex with rat CaMKK, but benefits from improved structural resolution. Careful comparison of the present structure to previous crystal structures of CaM complexed with unrelated peptides derived from myosin light chain kinase and CaM kinase II, allow a quantitative analysis of the differences in the relative orientation of the N and C-terminal domains of CaM, defined as a screw axis rotation angle ranging from 156 degrees to 196 degrees. The principal differences in CaM interaction with various peptides are associated with the N-terminal domain of CaM. Unlike the C-terminal domain, which remains unchanged internally, the N-terminal domain of CaM displays significant differences in the EF-hand helix orientation between this and other CaM structures. Three hydrogen bonds between CaM and the peptide (E87-R336, E87-T339 and K75-T339) along with two salt bridges (E11-R349 and E114-K334) are the most probable determinants for the binding direction of the CaMKK peptide to CaM.

Solution structure of calmodulin-W-7 complex: the basis of diversity in molecular recognition.

The solution structure of calcium-bound calmodulin (CaM) complexed with an antagonist, N-(6-aminohexyl)-5-chloro-1-naphthalenesulfonamide (W-7), has been determined by multidimensional NMR spectroscopy. The structure consists of one molecule of W-7 binding to each of the two domains of CaM. In each domain, the W-7 chloronaphthalene ring interacts with four methionine methyl groups and other aliphatic or aromatic side-chains in a deep hydrophobic pocket, the site responsible for CaM binding to CaM-dependent enzymes such as myosin light chain kinases (MLCKs) and CaM kinase II. This competitive binding at the same site between W-7 and CaM-dependent enzymes suggests the mechanism by which W-7 inhibits CaM to activate the enzymes. The orientation of the W-7 naphthalene ring in the N-terminal pocket is rotated approximately 40 degrees with respect to that in the C-terminal pocket. The W-7 ring orientation differs significantly from the Trp800 indole ring of smooth muscle MLCK bound to the C-terminal pocket and the phenothiazine ring of trifluoperazine bound to the N or C-terminal pocket. These comparative structural analyses demonstrate that the two hydrophobic pockets of CaM can accommodate a variety of bulky aromatic rings, which provides a plausible structural basis for the diversity in CaM-mediated molecular recognition.