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Articles by S Park
Total Records ( 7 ) for S Park
  J. H Kim , W. C Kim , M. S Waterman , S Park and L. M. Li

Summary: Haplotype assembly is becoming a very important tool in genome sequencing of human and other organisms. Although haplotypes were previously inferred from genome assemblies, there has never been a comparative haplotype browser that depicts a global picture of whole-genome alignments among haplotypes of different organisms. We introduce a whole-genome HAPLotype brOWSER (HAPLOWSER), providing evolutionary perspectives from multiple aligned haplotypes and functional annotations. Haplowser enables the comparison of haplotypes from metagenomes, and associates conserved regions or the bases at the conserved regions with functional annotations and custom tracks. The associations are quantified for further analysis and presented as pie charts. Functional annotations and custom tracks that are projected onto haplotypes are saved as multiple files in FASTA format. Haplowser provides a user-friendly interface, and can display alignments of haplotypes with functional annotations at any resolution.

  Y Koh , I Kim , J. Y Bae , E. Y Song , H. K Kim , S. S Yoon , D. S Lee , S. S Park , M. H Park , S Park and B. K. Kim

Differences in the clinical course of secondary acute myeloid leukemia according to the type of the preceding disorders are not defined. We compared the outcomes of therapy-related acute myeloid leukemia, acute myeloid leukemia following myelodysplastic syndrome and acute myeloiod leukemia following myeloproliferative neoplasm. We also intended to find prognostic factors in secondary acute myeloid leukemia overall.


Retrospective medical record review at Seoul National University Hospital was performed. We assessed response to induction chemotherapy and overall survival.


Ninety-five secondary acute myeloid leukemia patients (median age of 56.4 years) were analyzed. Twenty-six, 57 and 12 patients had therapy-related leukemia, leukemia following myelodysplastic syndrome and myeloproliferative neoplasm, respectively. For patients receiving induction chemotherapy, complete remission rate was 47.5% and complete remission rate was different according to the type of the preceding disorders (P = 0.004). Compared to therapy-related leukemia (P = 0.027) and leukemia following myelodysplastic syndrome (P = 0.050), leukemia following myeloproliferative neoplasm had shorter overall survival. In secondary leukemia, presence of trisomy 8 had a prognostic impact (P = 0.003) along with cytogenetic risk group (P = 0.016). In multivariate analysis, the type of the preceding disorders (P = 0.026), 5q deletion (P = 0.015) and trisomy 8 (P = 0.040) were independent prognostic factors.


Prognosis of secondary acute myeloid leukemia was different according to the type of the preceding disorders with the worst prognosis in leukemia following myeloprolfierative neoplasm. Along with cytogenetic risk grouping, trisomy 8 had a poor prognostic impact in secondary acute myeloid leukemia.

  E. C Walvoord , A de la Pena , S Park , B Silverman , L Cuttler , S. R Rose , G Cutler , S Drop and J. J. Chipman

Background: Delivery of GH via inhalation is a potential alternative to injection. Previous studies of inhaled GH in adults have demonstrated safety and tolerability.

Objective: We sought to assess safety and tolerability of inhaled GH in children and to estimate relative bioavailability and biopotency between inhaled GH and sc GH.

Design/Methods: This pediatric multicenter, randomized, double-blind, placebo-controlled, crossover trial had two 7-d treatment phases. Patients received inhaled GH and sc GH in the alternate phase. Placebo was administered by the route opposite from active drug. GH and IGF-I levels were measured at multiple time points. Pharmacokinetics were assessed using noncompartmental methods.

Results: Twenty-two GH-deficient children aged 6–16 yr were treated. Absorption of GH appeared to be faster after inhalation with maximum serum concentrations measured at 1–4 h compared with 2–8 h for sc GH. Mean relative bioavailability for inhaled GH was 3.5% (90% confidence interval 2.7–4.4%). Mean relative biopotency, based on IGF-I response, was 5.5% (confidence interval 5.2–5.8%). Similar dose-dependent increases in mean serum GH area under the curve and IGF-I changes from baseline were seen after inhaled and sc GH doses. Inhaled GH was well tolerated and preferred to injection. No significant changes in pulmonary function tests were seen.

Conclusions: In this first pediatric trial of GH delivered by inhalation, it was well tolerated and resulted in dose-dependent increases in serum GH and IGF-I levels. This study establishes that delivery of GH via the deep lung is feasible in children.

  H Kim , E Hwang , S Park and S. Han

Encapsulating peritoneal sclerosis (EPS) is a rare but severe complication of peritoneal dialysis. It has been reported that the condition of patients with EPS may improve after renal transplantation. However, there are also several reports of EPS occurring after renal transplantation. In this report, we present a patient who developed EPS combined with gastrointestinal cytomegalovirus infection 21 months after successful renal transplantation, despite the use of tacrolimus and low-dose steroid as maintenance immunosuppression.

  S Park , T. A DiMaio , E. A Scheef , C. M Sorenson and N. Sheibani

Platelet endothelial cell adhesion molecule-1 (PECAM-1/CD31) is a member of the immunoglobulin superfamily of cell adhesion molecules with important roles in angiogenesis and inflammation. However, the molecular and cellular mechanisms, and the role that specific PECAM-1 isoforms play in these processes, remain elusive. We recently showed attenuation of retinal vascular development and neovascularization in PECAM-1-deficient (PECAM-1–/–) mice. To gain further insight into the role of PECAM-1 in these processes, we isolated primary retinal endothelial cells (EC) from wild-type (PECAM-1+/+) and PECAM-1–/– mice. Lack of PECAM-1 had a significant impact on endothelial cell-cell and cell-matrix interactions, resulting in attenuation of cell migration and capillary morphogenesis. Mechanistically these changes were associated with a significant decrease in expression of endothelial nitric oxide synthase (eNOS) and nitric oxide (NO) bioavailability in PECAM-1–/– retinal EC. PECAM-1–/– retinal EC also exhibited a lower rate of apoptosis under basal and challenged conditions, consistent with their increased growth rate. Furthermore, reexpression of PECAM-1 was sufficient to restore migration and capillary morphogenesis of null cells in an isoform-specific manner. Thus PECAM-1 expression modulates proangiogenic properties of EC, and these activities are significantly influenced by alternative splicing of its cytoplasmic domain.

  C. D Samuel Hodge , T. C Keyserling , S Park , L. F Johnston , Z Gizlice and S. I. Bangdiwala


This study developed and tested a culturally appropriate, church-based intervention to improve diabetes self-management.

Research Design and Methods

This was a randomized trial conducted at 24 African American churches in central North Carolina. Churches were randomized to receive the special intervention (SI; 13 churches, 117 participants) or the minimal intervention (MI; 11 churches, 84 participants). The SI included an 8-month intensive phase, consisting of 1 individual counseling visit, 12 group sessions, monthly phone contacts, and 3 encouragement postcards, followed by a 4-month reinforcement phase including monthly phone contacts. The MI received standard educational pamphlets by mail. Outcomes were assessed at 8 and 12 months; the primary outcome was comparison of 8-month A1C levels.


At baseline, the mean age was 59 years, A1C 7.8%, and body mass index 35.0 kg/m2; 64% of participants were female. For the 174 (87%) participants returning for 8-month measures, mean A1C (adjusted for baseline and group randomization) was 7.4% for SI and 7.8% for MI, with a difference of 0.4% (95% confidence interval [CI], 0.1-0.6, P = .009). In a larger model adjusting for additional variables, the difference was 0.5% (95% CI, 0.2-0.7, P < .001). At 12 months, the difference between groups was not significant. Diabetes knowledge and diabetes-related quality of life significantly improved in the SI group compared with the MI group. Among SI participants completing an acceptability questionnaire, intervention components and materials were rated as highly acceptable.


The church-based intervention was well received by participants and improved short-term metabolic control.

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