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To participate as co-receptor in growth factor signaling, heparan sulfate must have specific structural features. Recent studies show that when the levels of 6-O-sulfation of heparan sulfate are diminished by the activity of extracellular heparan sulfate 6-O-endosulfatases (Sulfs), fibroblast growth factor 2-, heparin binding epidermal growth factor-, and(More)
OBJECTIVES/HYPOTHESIS Propranolol has recently been introduced as a novel pharmacologic treatment for infantile hemangiomas. Systematic examination of this treatment in a tertiary care setting has not been described. This study explores the impact of propranolol on both proliferative and involuting hemangiomas at a tertiary vascular anomalies center. (More)
Heparan sulfate proteoglycans (HSPGs), via their interactions with numerous effector molecules such as FGF-2, IL-8, and VEGF, regulate the biological activity of cells by acting as co-receptors that promote signaling. The extent and nature of their role as co-receptors is often misregulated in cancer as manifested by alterations in HSPG structure and(More)
Myeloma tumors are characterized by high expression of syndecan-1 (CD138), a heparan sulfate proteoglycan present on the myeloma cell surface and shed into the tumor microenvironment. High levels of shed syndecan-1 in the serum of patients are an indicator of poor prognosis, and numerous studies have implicated syndecan-1 in promoting the growth and(More)
OBJECTIVE To examine the location and degree of endothelial nitric oxide synthase (eNOS) protein expression in hemangioma growth, involution, and during propranolol therapy. DESIGN Cross-sectional study. SETTING University hospital. PATIENTS Pediatric patients with hemangiomas. INTERVENTIONS Fresh human hemangioma specimens at various stages of(More)
The heparan sulfate proteoglycan syndecan-1 is expressed by myeloma cells and shed into the myeloma microenvironment. High levels of shed syndecan-1 in myeloma patient sera correlate with poor prognosis and studies in animal models indicate that shed syndecan-1 is a potent stimulator of myeloma tumor growth and metastasis. Overexpression of extracellular(More)
BACKGROUND The purpose of this study was to investigate the potential role of variable microRNA (miRNA) expression in the development of multidrug resistance (MDR) in head and neck cancer. METHODS Head and neck squamous cell carcinoma cell lines UMSCC-1 and SQ20B were treated with docetaxel at increasing concentrations to develop resistant cell lines.(More)
PURPOSE To develop an in vitro model of human lymphatic malformations (LM) that reflects histological characteristics of native LM. METHODS Fresh human LM (n = 6) were harvested, sectioned, explanted into a fibrinogen gel, and cultured. A total of 25 explants were developed and observed for primary and peripheral cellular growth. On days 9 to 10, the(More)
OBJECTIVES/HYPOTHESIS To determine the neuropathologic findings in tissue obtained from children with laryngomalacia at a tertiary-care pediatric hospital. STUDY DESIGN Retrospective review of consecutive cohort compared with a control group. METHODS We reviewed supra-arytenoid pathology specimens from 43 children with severe laryngomalacia and 13(More)
IMPORTANCE Endoglin (CD105) and endothelial nitric oxide synthase (eNOS) assist in regulating vascular development. Variation in expression of these factors is linked to errors in vascular growth and remodeling in invasive lesions. OBJECTIVE To clarify the role of endoglin and eNOS in the growth of extracranial head and neck arteriovenous malformations(More)