Long-term outcomes and the quality of life of Hirschsprung disease in adolescents who have reached 18 years or older--a 47-year single-institute experience.

BACKGROUND AND AIMS: Hirschsprung disease is considered to be curable when performing definitive surgery. However, the postoperative bowel function is not always satisfactory. The long-term postoperative function of bowel evacuation and the quality of life of such patients are considered to be important. In this study, we evaluated the general condition, bowel function, and social performance in adults who were older than 17 years who had suffered from Hirschsprung disease in childhood. METHODS: From 1963 to 2009, 184 patients with Hirschsprung disease underwent definitive surgery, mostly Z-shaped anastomosis at Kyushu University Hospital. As a result, 146 (95.4%) of 153 of those patients survived and reached 17 years of age. Their present status and symptoms, anorectal functions, genitourinary functions, and social performance were evaluated during the clinical follow-up based on a questionnaire survey. RESULTS: In our series, the evacuation score was rated as "excellent" (score of 7-8/8) in 66.7%, "good" (5-6/8) in 19.0%, "fair" (3-4/8) in 11.9%, and "poor" (0-2/8) in 2.4%. Therefore, 85.7% were considered to have a satisfactory bowel function. However, only 21.4% had a completely normal score of 8/8. Incontinence occurred in 16.7%, and soiling was present in 19.0% of the questionnaire respondents. The genitourinary function was considered to be within the reference range, and urinary problems were minimal. Among the respondents, 45.2% were married, and 68.4% of those married had children. The educational and professional careers of the respondents were successful. CONCLUSIONS: In general, the bowel function was satisfactory. However, the ratio of patients with completely normal bowel function was low. Because incontinence and soiling impair the quality of life, pediatric surgeons should therefore continue trying to achieve a complete bowel function after definitive surgery for the treatment of Hirschsprung disease.

Total colonic aganglionosis with or without small bowel involvement: a 30-year retrospective nationwide survey in Japan.

PURPOSE: We conducted a nationwide survey in Japan, to identify recent trends in the diagnosis and treatment of patients who had total colonic aganglionosis with or without small bowel involvement (TCSA). These data were compared with 2 similar studies conducted within the last 30 years. METHODS: Patient data were collected in 3 phases; phase I included 135 patients between 1978 and 1982; phase II, 107 patients between 1988 and 1992; and phase III, 101 patients between 1998 and 2002. RESULTS: The incidence of TCSA was 1:59,059, 1:58,084, and 1:58,375, and the male-female ratios were 1.5:1, 1.5:1, and 2.2:1 in each phase, respectively. Patients with associated anomalies increased from 15.2% (phase I) to 22.8% (phase III). The incidence of preoperative enterocolitis decreased over time. For treatment, Duhamel's procedure and ascending colon patch methods have increased over time, whereas Martin's procedure has decreased. The mortality rate dropped from 40.9% to 15.8%; however, a high mortality rate persists in those cases with small bowel involvement (35.5%). CONCLUSIONS: A marked decrease in the overall mortality rate was observed during the study period. However, further efforts are still required especially in cases involving aganglionosis extending orally to 75 cm from Treitz's band.

Alterations of RB1 gene in embryonal and alveolar rhabdomyosarcoma: special reference to utility of pRB immunoreactivity in differential diagnosis of rhabdomyosarcoma subtype.

PURPOSE: Rhabdomyosarcoma (RMS), which is the most common pediatric soft tissue sarcoma, is classified into two major histologic subtypes, embryonal RMS (ERMS) and alveolar RMS (ARMS). RMS is occasionally reported to be the second neoplasm of hereditary retinoblastoma. Osteosarcoma is known as the most common second neoplasm of hereditary retinoblastoma, and tumorigenesis of osteosarcoma has been proven in previous studies to be related to the RB gene (RB1) alteration. Therefore, there might be a correlation between the tumorigenesis of RMS and RB1 alteration. METHODS: We examined the RB protein (pRB) expression and RB1 alteration such as allelic imbalance (gain or loss) and homozygous deletion, using immunohistochemistry, microsatellite makers, and quantitative real-time PCR in 57 sporadic RMS. RESULTS: Allelic imbalance was more frequently detected in ERMS (13/27), than in ARMS (3/20) (P = 0.04). Homozygous deletion on the protein-binding pocket domain of RB1 was found in 6 of 27 ERMS and in 2 of 20 ARMS (P = 0.24). Furthermore, immunohistochemical pRB labeling indexes (LI) in 31 ERMS (median value, 31%) were significantly reduced in comparison with those observed in 26 ARMS (median value, 85%) (P < 0.0001). CONCLUSIONS: Our results support the assertion that tumorigenesis of RMS may be associated with RB1 alteration especially in ERMS, as previously reported for osteosarcoma. As for the RB pathway, each subtype of RMS may have a different tumorigenesis. In addition, immunohistochemical pRB LI may have the potential to be a useful ancillary tool in the differential diagnosis of RMS subtypes.

The lung-to-thorax transverse area ratio at term and near term correlates with survival in isolated congenital diaphragmatic hernia.

OBJECTIVE: The purpose of this study was to determine how well liver position, the lung area-to-head circumference (L/H) ratio, and the lung-to-thorax transverse area (L/T) ratio predicted the need for extra-corporeal membrane oxygenation (ECMO) and survival in fetuses with isolated congenital diaphragmatic hernia (CDH). METHODS: Antenatal records of 25 fetuses with isolated left-sided CDH who were born by cesarean delivery under fetal stabilization at this institution were reviewed. The latest determinations of the L/H and L/T ratios before birth (between 34 and 38 weeks' gestation) were compared on the basis of the cutoff points for mortality: less than 1.0 versus 1.0 or greater for the L/H ratio and 0.08 or less versus greater than 0.08 for the L/T ratio. Outcome measures assessed were survival (discharge to home) and the need for ECMO. RESULTS: Overall survival was 64% (16/25). Postnatal survival in fetuses with an L/T ratio of 0.08 or less was statistically lower than in those with an L/T ratio of greater than 0.08 (33% versus 81%; P = .0308). The percentage requiring ECMO in the group with an L/T ratio of 0.08 or less was also higher than that of the group with an L/T ratio of greater than 0.08, but the difference was not statistically significant (67% versus 25%; P = .0872). Neither the L/H ratio nor herniation of the fetal liver into the chest affected survival or the need for ECMO. CONCLUSIONS: In fetuses with isolated CDH at term or near term, the L/T ratio may be a better predictor of outcome than the L/H ratio or liver herniation.

An echovirus type 18 outbreak in a neonatal intensive care unit.

We describe an outbreak of echovirus type 18 infection involving 20 neonatal intensive care unit (NICU) patients and the results of virological investigations are presented. RT-PCR demonstrated a widespread transmission of the virus in NICU patients during the outbreak. Separation care and additional infection control measures seemed to be effective in preventing further spread of the virus.

Intracellular calcium mobilization of the aganglionic intestine in the endothelin B receptor gene-deficient rat.

BACKGROUND AND AIM: Up to now, numerous reports have analyzed the pathogenesis of Hirschsprung's disease (HD) by means of physiologic, pathologic, or molecular biologic methods. However, very little is still known about the smooth muscle cell itself. The endothelin B receptor gene-deficient (EDNRB(-/-)) rat, which is suitable for research of HD, has an aganglionic segment of the total colon. Our purpose is to investigate the myogenic mechanisms using simultaneous measurements of the intracellular Ca2+ concentration ([Ca2+]i) and tension and reverse transcriptase polymerase chain reaction for L-type Ca2+ channel (L-VOC) expression. METHODS: The muscle strips of the rat distal colon were loaded with a Ca2+ indicator dye, fura-PE3/AM, for 3 to 4 hours. The changes in the fluorescence intensity of Ca2+-fura-PE3 complex of the strips were monitored with a front surface fluorometer (CAM-230). The fluorescence intensities at 340- and 380-nm excitation and their ratio (F340/F380) were recorded as the level of [Ca2+]i. The comparison of L-VOC alpha1c subunit messenger RNA (mRNA) expression in both wild and homozygous rat was performed by reverse transcriptase polymerase chain reaction. RESULTS: The peak levels of force development induced by carbachol were 139.1% +/- 5.0% in EDNRB(-/-) rat, whereas the peak levels were 242.1% +/- 27.7% in EDNRB(+/+) rat. The changes in the [Ca2+]i elevation induced by carbachol were 101.7% +/- 12.2% in the homozygous rat, whereas these were 143.8% +/- 8.9% in the wild-type rat. Both results in the homozygous rat significantly decreased in comparison with those of the wild rat (P < .05). The expression of the L-VOC channel mRNA also decreased in the homozygous rat. CONCLUSIONS: This is the first report to show the [Ca2+]i mobilization in the smooth muscles of the rat model of HD. The decrease in both [Ca2+]i and force development was thus considered to be due to the decrease in the Ca2+ channel expression.

High expressions of neuronatin isoforms in favorable neuroblastoma.

Neuroblastoma is a malignant solid tumor of children, which derives from the embryonal sympathoadrenal linage. Clinical cases can vary widely from a favorable to an unfavorable prognosis according to the presence of genetic aberrations, such as MYCN amplification. Our cDNA microarray analysis which compared the gene expressions between favorable and unfavorable neuroblastomas showed a high expression of the neuronatin (Nnat) gene in favorable neuroblastomas. Nnat is highly conserved in mammalian species, and its expression appears in nervous systems from the hindbrain to the peripherals during the prenatal periods. The Nnat mRNA expression, investigated in 63 of neuroblastoma samples by quantitative reverse-transcription polymerase chain reaction, was found to be significantly higher in the favorable prognosis groups than in the unfavorable groups. Nnat is an imprinted gene, and its expression in IMR32 neuroblastoma cell line was up-regulated by treatment with a demethylating agent. High expressions of Nnat isoforms induced in an IMR32 neuroblastoma cell line changed the cell morphology to the extension of the neural processes, which thus indicated the occurrence of cell differentiation. In conclusion, the high expressions of Nnat were found to be associated with good prognoses in neuroblastoma, which might indicate tumor differentiation, and its suppressions in unfavorable tumors are considered to be under epigenetic control.

The influence of rejection on graft motility after intestinal transplantation in swine: the possibility of using this method for the real-time monitoring of acute cellular rejection.

BACKGROUND: We have previously reported that rejected allografts show dysmotility, which can be detected by real-time monitoring in swine. We examined the correlation between the motility and the mucosal histology to detect rejection at an early stage by real-time monitoring. METHODS: Intestinal transplantation was performed orthotopically using FK506. The distal segment of the allograft measuring about 20 cm was isolated and exteriorized as "Thiry-Vella" stoma for biopsies. Strain-gage force transducers were attached on a graft for the real-time monitoring of graft motility. The pigs without intestinal transplantation were used as controls (C). The rejection was classified into 4 groups based on the histologic findings: nonrejection, mild rejection, moderate rejection, and severe rejection. Migrating motor complex (MMC) phase 3 was estimated by the following parameters: duration, amplitude, interval, motility index, velocity, and frequency of the propagation. RESULTS: In the nonrejection group, all parameters were almost the same as in C group. In contrast, in the moderate rejection and severe rejection groups, most of the parameters were significantly lower than those in the C group. In the mild rejection group, the contractility of the MMC was not significantly altered, but the frequency of the propagation decreased significantly. CONCLUSIONS: The graft motility detected by the real-time strain-gage method correlated closely to the grade of mucosal histology. This method is therefore considered to be useful for detecting rejection at an early stage by examining the frequency of MMC propagation.

The effect of fetal stabilization using morphine hydrochloride on neonatal rats.

We previously showed that fetal stabilization (FS) could improve the prognosis of congenital diaphragmatic hernia (CDH) patients. The aim of this study is to elucidate the effect of FS in normal neonatal rats. Pregnant Sprague-Dawley rats were treated by experimental protocols on day 21 of gestation. In the FS-group, they received morphine hydrochloride via the placenta before undergoing a caesarean section. In the control group (C-group), they received no morphine hydrochloride. All neonatal rats were managed under mechanical ventilation. We collected the blood samples and bronchoalveolar lavage fluid (BALF) at birth and at 4 h after birth in both groups and the cytokine levels in those samples were measured. The specimens obtained from the right lung were stained with anti-TNF-alpha antibody. The levels of serum TNF-alpha at birth and IL-6 at 4 h after birth in the FS-group decreased, in comparison to those in the C-group. The staining intensity of anti-TNF-alpha antibody in the FS-group was weaker than that in the C-group. FS reduced the production of inflammatory cytokines on neonatal rats, which was controlled by mechanical ventilation. This effect may beneficially reduce the occurrence of persistent pulmonary hypertension of neonate (PPHN), which is induced by stress in CDH patients.

Highly aggressive behavior of malignant rhabdoid tumor: a special reference to SMARCB1/INI1 gene alterations using molecular genetic analysis including quantitative real-time PCR.

PURPOSE: SMARCB1/INI1, which negatively regulates cell cycle progression from G0/G1 into the S-phase via the p16INK4a-RB-E2F pathway, has been reported to be inactivated homozygously by deletion and/or mutations in malignant rhabdoid tumor (MRT). In the current study, we investigated the alteration of the SMARCB1/INI1 gene using simple methods, and its gene product at the protein level. Moreover, we investigated the status of hyperphosphorylation in RB protein, known as a key cell cycle molecule. METHODS: Three cell lines and 11 formalin-fixed, paraffin-embedded specimens of MRT were investigated. SMARCB1/INI1 gene alteration was analyzed with simple methods as a quantitative real-time PCR and direct sequencing method. Furthermore, SMARCB1/INI1 and RB protein were immunohistochemically evaluated. RESULTS: In 12 of 14 cases, we detected genetic alterations comprised of nine (including three cell lines) homozygous deletions and three mutations, which can induce abnormal expression of gene products. At the protein level, SMARCB1/INI1 immunohistochemical expressions were not detected in any cases. Twelve out of 14 cases showed high-level (+5) expression of tRB (both hyperphosphorylated and underphosphorylated RB), combined with low-level (+1) expression of uRB (underphosphorylated RB), indicating a high rate of hyperphosphorylation. CONCLUSIONS: We could analyze the SMARCB1/INI1 gene alteration with simple methods, and SMARCB1/INI1 gene alteration was found in 12 of 14 cases. Especially, quantitative real-time PCR was a convenient and accurate method. In addition, a high rate of hyperphosphorylation of RB gene was recognized. These results suggest that the clinically aggressive character of MRT is caused by the inactivation of the SMARCB1/INI1 gene.

Implications of MYCN amplification in patients with stage 4 neuroblastoma who undergo intensive chemotherapy.

BACKGROUND/PURPOSE: This study aims to clarify the implications of MYCN amplification in patients with high-risk neuroblastomas treated with 2 different regimens of induction chemotherapy established by the Japan Study Group for Advanced Neuroblastoma. METHODS: Between 1985 and 2003 in Japan, 392 patients with stage 4 neuroblastomas who were older than 12 months were treated with 2 regimens of induction chemotherapy (the combination of cyclophosphamide [CTX], cisplatin [CDDP], pirarubicin, and vincristine or etoposide). Regimen 91A3 or 98A3 (A3) (CTX 2400 mg/m2, CDDP 125 mg/m2) was a higher dose combination of CTX and CDDP than regimen 85A1 or 91A1 (A1) (CTX 1200 mg/m2, CDDP 90 mg/m2). The 392 cases were classified into 3 groups (A, 1 copy; B, 2-9 copies; C, more than 10 copies) based on the MYCN amplification status by a Southern blot analysis. RESULTS: The 5-year overall survival rate (5-YS) was 41.1% for all 392 cases. Regarding the MYCN amplification status, the 5-YS was 46.6% for A group (n = 227), 22.7% for B group (n = 26), and 36.0% for C group (n = 139). A fluorescence in situ hybridization analysis showed the presence of the cells with more than 10 copies in cases with 2 to 9 copies based on the Southern blot findings. Of the 227 patients in a group, the 5-YS was 46.7% for the 70 cases treated by A3 and 47.0% for 154 cases treated by A1 (nonsignificant). The 5-YS of the 210 patients with stem cell transplantation (SCT) (51.%) was significantly better than that of the 127 patients without SCT (41.1%) (P < .05). CONCLUSIONS: Regarding the MYCN amplification status, the tumor aggressiveness might thus be different between 2 and 9 copies and a single copy of MYCN. In neuroblastomas with 2 and 9 copies of MYCN based on a Southern blot analysis, the MYCN amplification status should be analyzed using the fluorescence in situ hybridization method. Induction chemotherapy followed by SCT according to the Japan Study Group for Advanced Neuroblastoma protocol improved the outcome of neuroblastomas with MYCN amplification; however, obtaining a further improvement in the long-term survival of stage 4 neuroblastomas may therefore require the development of an even more effective treatment modality.

Reciprocal expression of CCAAT/enhancer binding proteins alpha and beta in hepatoblastomas and its prognostic significance.

Hepatoblastoma is one of the common pediatric solid tumors with frequent mutation of the beta-catenin gene which might be an early event of its carcinogenesis. However, the detailed molecular mechanism is still unknown. We studied the expression levels of CCAAT/enhancer binding protein alpha (C/EBPalpha) and C/EBPbeta, which regulate differentiation and growth of embryonic hepatocytes, to establish whether or not they were involved in affecting the clinical behavior of hepatoblastoma. The quantitative real-time reverse transcriptase-PCR revealed that expression of C/EBPalpha mRNA was significantly up-regulated in tumors 223% (p=0.013) as compared with that in adjacent normal livers, while expression of C/EBPbeta was down-regulated to 27% (p=0.002). Of interest, the immunohistochemical analysis showed that expression of C/EBPalpha was higher and that of C/EBPbeta lower in the poorly differentiated tumor cells than in the well-differentiated cells within the same tumor. Furthermore, high expression of C/EBPalpha (p=0.047) as well as low expression of C/EBPbeta (p=0.025) was significantly associated with poor prognosis of the patients. Cox hazard model suggested that expression of C/EBPalpha and that of C/EBPbeta were independent indicators to predict the prognosis from age but not from histology. Thus, expression of C/EBP proteins may play an important role in the genesis and clinical behavior of hepatoblastoma probably by inducing different stages of arrest of differentiation.

Clinical characteristics and outcome of Wilms tumors with a favorable histology in Japan: a report from the Study Group for Pediatric Solid Malignant Tumors in the Kyushu Area, Japan.

BACKGROUND/PURPOSE: Since 1996, the standard treatment of Wilms tumors in Japan has been based on the regimen of the Japanese Wilms Tumor Study. However, in Japan, there have been no reports about Wilms tumors that analyzed the clinical features and patient outcome in a large series until now. This study aims to assess the clinical characteristics of patients with Wilms tumor with a favorable histology from a retrospective standpoint in the Kyushu area in Japan and, furthermore, to analyze the historical changes of clinical features and outcome from the 1980s to the 1990s. METHODS: Between 1982 and 1996, 90 cases of Wilms tumors with a favorable histology were registered in the Kyushu area. Regarding the clinical feature and outcome, they were divided into 2 groups (group A, 1982-1989, n = 50; group B, 1990-1996, n = 40). The outcome was analyzed based on the 5-year overall survival rate. RESULTS: The clinical features (age, sex, initial symptom, location, stage) demonstrated no definite differences between group A and group B. Regarding the operation, the rate of an initial complete resection in the early stages was significantly higher in group B than in group A. All stage V cases in group B undewent a bilateral tumor biopsy instead of a radical nephrectomy as the initial operation. The 5-year overall survival rate throughout the whole period was 87.8%, whereas the rates were 84.0% for group A and 90.0% for group B (P = NS), respectively. Of particular note, the outcome of patients with stage I and stage V in group B substantially improved in comparison to that in group A. However, in advanced cases, no significant improvement in the outcome was noted. CONCLUSIONS: This is the first report about the clinical features and outcome for Wilms tumors with a favorable histology in Japan from the 1980s to the 1990s. The present study suggested that in the early-stage cases, an initially complete resection followed by standard postoperative chemotherapy substantially improved the outcome of the patients in group B. In the stage V cases, the performance of renal salvage surgery may have positively contributed to the improvement in the outcome in group B. However, in the advanced stage cases, no definite improvement was noted. In the future, an improved efficacy of the treatments for Wilms tumors based on the standard protocol established by the Japanese Wilms Tumor Study in 1996 is expected in Japan.

A case of an abdominoscrotal hydrocele surgically treated under laparoscopic assistance.

We herein describe a 9-month-old boy who presented with bilateral scrotal hydroceles shortly after birth. The right hydrocele spontaneously resolved during this period, and a nonpalpable testis of the right side was noted. In contrast, the left hydrocele gradually increased in size. Ultrasound and magnetic resonance investigations performed at the age of 7 months could not detect the right testis either in the inguinoscrotal region or the abdominal cavity. These examinations also pointed out a huge hydrocele that extended from the left scrotum to the abdominal cavity. At the age of 9 months, a laparoscopic-assisted operation for both the right undescended testis and the left abdominoscrotal hydrocele (ASH) was performed. During the operation, an atrophic testis secondary to in utero intravaginal torsion was shown on the right inguinal region, and a huge ASH was revealed in the left inguinoscrotal region. The finding of the left ASH was confirmed by a laparoscope inserted through the processus vaginalis of the right side. At first, the processus vaginalis of the left side was highly ligated by the inguinal approach, and then the ASH was opened and its wall was resected. Our findings suggest that both an understanding of the pathogenesis and a corrective operation of ASH can be made via the inguinal approach. In cases associated with cryptochidism owing to an intraabdominal testis or an in utero extravaginal torsion, a laparoscopic-assisted operation may therefore be useful both for making a precise diagnosis and for surgically removing an ASH.

Oesophageal atresia with a terminal deletion of chromosome 2q37.1.

We herein report the case of a newborn girl with oesophageal atresia associated with cardiac and gastrointestinal anomalies, including patent ductus arteriosus, tracheomalacia, and gastro-oesophageal reflux with hiatus hernia. In addition, she had a terminal deletion of the long arm of chromosome 2, with a breakpoint of 2q37.1. The patient died following a cardiac arrest at 90 days of age. No cause of death was identified at autopsy.

Experimental study concerning safety dosage of OK-432 for intrauterine treatment.

OBJECTIVE: Clinical intrauterine treatment for fetal cystic hygroma has so far been performed in a few patients; however, it is still difficult to evaluate the results. The aim of this study is to establish the safe dosage of OK-432 in the intrauterine treatment of fetal cystic hygroma. METHODS: OK-432 was injected either subcutaneously behind the neck of the fetuses or into the amniotic cavity through the uterine wall of pregnant Japanese white rabbits at 27 days of gestation. Saline was administered to the controls. The dosage and the site of injection were as follows: group 1, OK-432, 0.01 KE (0.25 KE/kg) in 0.2 mL saline per fetus, subcutis; group 2, OK-432, 0.02 KE (0.5 KE/kg) in 0.2 mL saline per fetus, subcutis; group 3, OK-432, 0.04 KE (1 KE/kg) in 0.2 mL saline per fetus, subcutis; group 4, OK-432, 0.01 KE in 0.2 mL saline per fetus, amniotic cavity; group 5, OK-432, 0.04 KE in 0.2 mL saline per fetus, amniotic cavity; group 6, saline, 0.2 mL per fetus, subcutis; group 7, saline, 0.2 mL per fetus, amniotic cavity. All fetuses were delivered at 29 days of gestation. RESULTS: The mother's rectal temperature was mostly in the normal range throughout the experiment. There was no significant difference between any of the seven groups in fetal body weight. The C reactive protein values of all fetuses were negative. The appearance of the skin of all the fetuses was normal. The histopathological findings of the skin in the OK-432 groups showed a moderate infiltration of monocytes and plasma cells. No pathological changes were observed in the heart, lung, liver or kidneys of any of the fetuses. CONCLUSION: Based on this rabbit experiment, we determined that OK-432 may be safely used at a dose of up to 1 KE/1 kg of fetal body weight as an intrauterine treatment for fetal cystic hygroma.

Safe techniques for inserting the hickman catheter in pediatric patients.

The placement of the Hickman catheter in the central veins is thought to be an effective method for providing venous access in various clinical situations in children. The catheter is usually inserted by the percutaneous approach, but in some cases various troublesome complications can occur, such as sheath introducer kinking or damage, in addition to other major ones. Therefore, some modified techniques, using vascular dilators, both to dilate the route and to avoid such complications, have been developed and investigated to obtain a smooth and safe percutaneous insertion of the Hickman catheter in children. A total of 41 Hickman catheters were inserted by the percutaneous method in 41 pediatric patients from 1996 to 2004 in our department. Sixteen catheters were inserted by means of a standard method, using the manufacturer's insertion kit, and 25 catheters were inserted by means of a modified method, namely, using various sized vascular dilators. The length of time for the procedure, the complication rate, and the changes in the serum C-reactive reaction (CRP) levels were then compared between the standard and the modified methods. Those parameters were also compared between a right-side and left-side approach using both methods, to clarify which side was better for the insertion of this catheter. The length of time for the catheter replacement procedure in the standard group was significantly longer than that in modified one. The occurrence rate for both the kinking and small damage to the sheath introducer in the standard group was higher than that in the modified one. The peak of serum CRP in the modified group was significantly lower than that in the standard one. When comparing a right-side and left-side approach, 7 catheters out of 16 were inserted by the right-side approach in the standard group, while 10 catheters out of 25 were done by the right-side approach in the modified group. The length of time for the procedure for the left-side approach was significantly shorter than that for the right-side one in both groups. No difference in technical complications was observed between the two different approaches in the modified group, while complications when using the right-side approach often occurred in the standard group. The peak of serum CRP in the left-side approach was lower than that in the right-side one in both groups. The use of the modified percutaneous method, using various sized vascular dilators and the left-side approach, was therefore found to be useful for the safe and smooth placement of the Hickman catheter in children.

Age-specific effect of phthalate ester on testicular development in rats.

PURPOSE: Phthalate esters have been shown to induce testicular damage in both adult and immature rats; however, there have been, so far, few reports describing the age-specific effects of phthalate esters on testicular function. The aim of this study is therefore to investigate the age-specific effects of mono-n-butyl phthalate (MBP) on the testes in both prepubertal and mature adult rats. MATERIALS AND METHODS: Both prepubertal male rats and adult mature male rats were fed special rat chow containing 1% MBP for 10 days. Control prepubertal and adult rats were fed standard commercial rat chow during the same period as the MBP-treated rats. After 10 days of feeding, all rats were killed, and the testes were removed. The weight of the testis was measured, and histological examination of the testis was performed. In addition, the frequency of an apoptotic cell appearance in the seminiferous tubules was determined in both MBP-treated and control groups. RESULTS: In the prepubertal rats, the mean weight of the testes was significantly lower in the MBP-treated rats than in the control rats. A histological examination of the MBP-treated testes showed a decreased seminiferous tubular diameter and an inhibited maturation of germ cells in comparison to those of the control testes. Furthermore, apoptotic cells appeared more frequently in the MBP-treated testes than in the control testes. Although in adult mature rats, no significant difference was observed in either the testicular weight or the histological findings between the MBP-treated and control rats. CONCLUSIONS: The oral administration of MBP to male rats was observed to produce more pronounced testicular damage in prepubertal rats than in adult mature rats. Immature testes may thus be more sensitive to MBP, which induces the germ cell apoptosis in seminiferous tubules and testicular atrophy in prepubertal young rats.

Biological diagnosis for neuroblastoma using the combination of highly sensitive analysis of prognostic factors.

BACKGROUND/PURPOSE: To select the optimal treatment according to the degree of malignancy of neuroblastoma, it is essential to accurately and rapidly identify any genetic abnormalities associated with the prognosis. This study aims to assess the correlation between the combination of prognostic factors and the biologic findings of neuroblastoma using a highly sensitive analysis of prognostic factors. METHODS: In 44 neuroblastoma primary samples, we determined the gene dosages of MYCN and Survivin (as the target of 17q gain) and the expression levels of MYCN, Survivin, and BIN1 using highly sensitive analysis (the quantitative polymerase chain reaction method); furthermore, we assessed the correlation between the combination of their prognostic factors and the biology of neuroblastoma. RESULTS: The gene dosage of MYCN or Survivin was significantly associated with all known prognostic factors. The expression level of MYCN or Survivin was not significantly associated with any prognostic factors, whereas the expression level of BIN1 was significantly associated with 5 of 6 prognostic factors. Regarding the combination of MYCN amplification and 17q gain (the gene dosage of Survivin), and the low expression of BIN1, the rates of advanced stages (stage III or IV) were 100% for the cases with 3 factors, 63% for the cases with 2 factors, 42% for the cases with 1 factor, and 0% for the cases with null factor. Furthermore, the survival rates were 20% for the cases with 3 factors, 50% for the cases with 2 factors, 100% for the cases with 1 factor, and 100% for the cases with null factor. CONCLUSION: The combination of gene dosages of MYCN and Survivin and the expression level of BIN1 using the quantitative polymerase chain reaction method was significantly correlated with the clinical stage and the patients' outcome. This combination of biologic factors may enhance the accuracy to the conventional criteria, but this would have to be shown in a much larger study that is adequately powered to detect such an advantage.

Increased expression of c-fos and c-jun in the rat small intestinal epithelium after ischemia-reperfusion injury: a possible correlation with the proliferation or apoptosis of intestinal epithelial cells.

BACKGROUND AND PURPOSE: An increased expression of immediate early genes, such as the c-fos and c-jun, is observed in some organs after ischemia-reperfusion (I/R) injury. These factors have been revealed to potentially induce apoptosis and proliferation of the postischemic cells. The purpose of this study is to analyze the relationship between the expression patterns of such immediate early genes and the cellular responses in the intestinal epithelial cells (IECs) after I/R stress. METHODS: The rat small intestine was reperfused after 30 minutes ischemia. Semiquantitative reverse transcription-polymerase chain reaction was used to quantify c-fos and c-jun messenger RNAs. The proliferation and apoptosis of IECs were detected by immunohistochemistry and the in situ terminal deoxynucleotidyl transferase-mediated dUTP biotin nick-end labeling method, respectively. RESULTS: The messenger RNA levels of the c-fos and c-jun showed characteristic patterns in the IECs after the I/R stress. The proliferation of the cells was initially observed after the I/R stress, followed by apoptosis of the cells. CONCLUSIONS: The sequential expression patterns of these factors are possibly related to the proliferation and apoptosis of the IECs.