Molecular relationship between bone and bone marrow
Main researcher
: MARUŠIĆ, ANA (136152) Assistants
MARTINOVIĆ, IGOR (106744)
TRUTIN-OSTOVIĆ, KARMEN (142676)
HARIŠ, VIŠNJA (202265)
KOS, KSENIJA (191943)
KATAVIĆ, VEDRAN (900019)
Type of research: basic Duration from: 09/01/93. to 09/01/96. Papers on project (total): 7
Papers on project quoted in Current Contents: 4
Institution name: Medicinski fakultet, Zagreb (108) Department/Institute: Department of Anatomy Address: Šalata 11, p.p. 916 City: 10000 - Zagreb, Croatia
Communication
Phone: 385 (0)1 45 66 825
Fax: 385 (0)1 27 11 95
E-mail: marusica@mamef.mef.hr
Summary: The relationship between bone and bone marrow is constant
and manyfold, and disturbances in one system lead to disturbances in the
other. The understanding of the nature of the relationship between bone and
bone marrow on cellular and molecular level is the main aim of the proposed
research. Stromal cells from the human bone marrow will be grown in vitro
in conditions promoting their differentiation towards osteoblastic
phenotype. The expression of osteoblast-specific genes will be determned
using biochemical and gene markers. Special attention will be given to the
osteogenic potential of bone marrow in different hematological disturbances
(myelodysplastic syndrome, aplastic anemia etc.). In vivo, the role of the
immunological system will be investigated in the mouse models of different
immunodeficient states. Bone differentiation will be studied in the model
of osteoinduction by demineralized bone matrix or bone marrow and will be
evaluated histologically, biochemically and genetically.
Keywords: bone, bone marrow, osteoblast, stromal cells, differentiation, immunodefficiencies, immune system
Research goals: The main aim of the proposed research is the study
of the interrelationship between bone and bone marrow on cellular and
molecular level. Although the osteogenic potential of the bone marrow has
been described, there is little knowledge on the sequence of events and
factors influencing the osteogenic differentiation in bone marrow. The
first direct aim of the proposed research is the determination of genetic
differentiation markers of stromal system in bone marrow. This is
especially relevant to the bone changes in hematological disorders, which
have been sporadically and inconsistently described in the literature. In
vivo work on mouse models of immunodeficient states, where it is possible
to generate subtle changes in different cell linegaes of the hematopoetic
system, will facilitate the investigation of the role of different parts
of the immune system in osteogenesis. The expected contribution of the
proposed research is in the unification of the research on bone and bone
marrow. Up to the present, the research on those two anatomically close and
related tissues has been scarce, especially in vivo. The elucidation of the
differentiation sequence of the bone marrow stromal system would improve
the understanding of the relationships between bone and bone marrow. The
understanding of the balance between bone and bone marrow in health and
disease would also improve the treatment and prognosis of the bone changes
and recovery in hematologic disorders.
COOPERATION - PROJECTS
Name of project
: Identification of molecular markers of human
bone cells: their use in defining interactions between bone cells and
bone-marrow Name of institution: Institut fuer Pathologie, GSF Muenchen, SRNj -
u okviru bilateralne znanstvene i tehničke suradnje SRNj i RH -
Forschungszentrum Juelich City: Juelich, SR Njemačka
Name of project
: JF199 The role of the immune system in new bone
formation Name of institution: National Institutes for Health City: Bethesda, S.A.D. Other information about the project.