TACSTD2 encodes a transmembrane glycoprotein Trop2 commonly overexpressed in carcinomas. While the Trop2 protein was discovered already in 1981 and first antibody-drug conjugate targeting Trop2 were recently approved for cancer therapy, the physiological role of Trop2 is still not fully understood. In this article, we show that TACSTD2/Trop2 expression is evolutionarily conserved in lungs of various vertebrates. By analysis of publicly available transcriptomic data we demonstrate that TACSTD2 level consistently increases in lungs infected with miscellaneous, but mainly viral pathogens. Single cell and subpopulation based transcriptomic data revealed that the major source of TACSTD2 transcript are lung epithelial cells and their progenitors and that TACSTD2 is induced directly in lung epithelial cells following infection. Increase in TACSTD2 expression may represent a mechanism to maintain/restore epithelial barrier function and contribute to regeneration process in infected/damaged lungs.

• MeSH
• antigeny nádorové * metabolismus   MeSH
• epitelové buňky metabolismus   MeSH
• molekuly buněčné adheze * metabolismus   MeSH
• plíce metabolismus   MeSH
• upregulace MeSH
• zvířata MeSH
• Check Tag
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH

RATIONALE: The Ewing sarcoma family of malignant tumors is a group of tumors characterized by morphologically similar round-cell neoplasms and by the presence of a common chromosomal translocation; Ewing sarcoma family of tumors typically occur in children and young adults between 4 to 15 years of age. The primary tumor usually originates in the bone, extraskeletal localization is rare. PATIENT CONCERN: We present a case report concerning a 32-year-old male patient with a primary involvement of the penis. DIAGNOSIS: The histopathology from the first penile biopsy showed a small-cell neuroendocrine carcinoma; however, that result was based on a sample obtained at a different facility than the Sarcoma Center, where the investigating pathologist did not have the adequate expertise. The patient then underwent a radical penectomy and a second reading of the histology was demanded after a radical penile amputation when Ewing sarcoma with R1 resection was confirmed. INTERVENTIONS: The patient was referred to the national Sarcoma Center, where - using a multidisciplinary approach - the treatment was started with curative intent. However, it was preceded by a non-standard initiation of the therapy due to the poor primary diagnosis. OUTCOMES: The non-standard therapy at the onset of the disease caused a poor prognosis of an otherwise curable diagnosis. Despite all that, the patient survived for a relatively long time. LESSONS: The treatment of sarcomas with atypical localizations should be conducted by an experienced multidisciplinary team in a center with experience in sarcoma treatment.

• MeSH
• dospělí MeSH
• Ewingův sarkom patologie   MeSH
• lidé MeSH
• nádory penisu patologie   MeSH
• penis patologie   MeSH
• Check Tag
• dospělí MeSH
• lidé MeSH
• mužské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• kazuistiky MeSH

Ontogenesis and tumorigenesis often share regulatory molecules that modulate key cellular events including cell proliferation, differentiation and survival. The c-Myb protein has been associated with control of these processes. Aberrant activation of c-Myb disturbs the balance in favor of proliferation and survival, thus contributing to malignant transformation. Our earlier research showed that c-Myb is involved in regulation of embryonal bone development. Recent findings, including preliminary data presented by us, demonstrate that c-Myb is expressed in osteosarcomas, bone tumors with specific age-related incidence. The aim of this study is to clarify the function of c-Myb in different stages of physiological bone development, and most importantly, the relevance of c-Myb in control of osteosarcoma progression and chemoresistance using cell lines, in vivo models and a clinical study. The clinical part will be further extended to other osteogenic pathologies with high incidence in childhood to further assess the importance of c-Myb in bone homeostasis in humans.

Klíčové buněčné procesy včetně proliferace, diferenciace a přežívání jsou často regulovány stejnými molekulami během ontogeneze a tumorigeneze. Je známo, že protein c-Myb se spolupodílí na řízení uvedených procesů. Aberantní aktivace tohoto proteinu narušuje rovnováhu v jejich regulaci a podporuje zvýšenou proliferaci a přežívání buněk, čímž přispívá k maligní transformaci. Náš předchozí výzkum ukázal, že c-Myb se podílí také na regulaci fyziologického vývoje kostí. Nedávno publikované výsledky, podpořené našimi preliminárními daty, potvrdily, že protein c-Myb je exprimován v osteosarkomech, nádorech kostní tkáně, které se vyznačují věkově specifickou incidencí. Cílem tohoto projektu je objasnění funkce proteinu c-Myb v různých fázích fyziologického vývoje kostí a především jeho významu v regulaci progrese a chemorezistence osteosarkomů. s využitím buněčných linií, in vivo modelů a klinické studie. Klinická část bude dále rozšířena o širší spektrum osteogenních patologií s typickým výskytem v období dospívání, což přispěje ke zhodnocení významu proteinu c-Myb v homeostáze kostí.

• MeSH
• chemorezistence MeSH
• geny myb MeSH
• homeostáza MeSH
• karcinogeneze genetika   MeSH
• mladiství MeSH
• osteogeneze genetika   MeSH
• osteosarkom farmakoterapie   genetika   MeSH
• Check Tag
• mladiství MeSH

• Konspekt
• Patologie. Klinická medicína
• NLK Obory
• onkologie
• genetika, lékařská genetika
• osteologie
• NLK Publikační typ
• závěrečné zprávy o řešení grantu AZV MZ ČR