Biomedical subjects

M Michejda

Publications and source records attributed to M Michejda.

40 records · Page 3Linked to original sources

PubMedDate not supplied

Functional and anatomic recovery in the monkey brain following excision of fetal encephalocele.

Teratogen-induced herniation of the occipital lobes (encephalocele) in monkey fetuses was repaired by amputation and cranioplasty in utero or postnatally. The in utero-treated animals had normal vision, CT scans indicated normal brain density, and autoradiographic visualization of the striate cortex by the [14C]-2-deoxyglucose mapping revealed almost complete functional and anatomic recovery. The animals treated postnatally were blind, and exhibited significant structural deficit in the operated area.

Age Factors↗

PubMedDate not supplied

Fetal therapy 1994.

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Animals↗

PubMedDate not supplied

Comparative study of hemopoietic precursors from fetal and adult bone marrow: utilization of stem cells derived from miscarriages.

Hemopoietic and immune capacities of fetal bone marrow (FBM) obtained from 2nd-trimester lost pregnancies and adult bone marrow (ABM) were compared. Progenitor cell assays for both sources were also enumerated. Out data showed ontogeny-related functional differences between hemopoietic cells, particularly in the ability to produce CD34+ cells (24.6% in FBM, 3.1% in ABM). The phenotypic composition of FBM and ABM were quite different. The clonogenic/proliferative potentials, as measured by CFU-C assays, were significantly higher in FBM when compared to ABM (202.5 vs. 73.5/10(5) cells). Moreover, FBM had a lower percentage of CD3+ T lymphocytes as compared to ABM (1.47 vs. 7.58), and there was a significantly decreased proliferative responsiveness in mixed lymphocyte reactions of FBM as compared to ABM. Thus, our data clearly showed distinct advantages of FBM over ABM, which include a higher number of stem cells, lower immunological reactivity, and higher clonogenic/proliferative potential. These characteristics provide optimal conditions for successful engraftment without graft-versus-host disease. These data support the possible advantages of FBM from these sources for hemopoietic stem cell reconstitution and gene therapy.

Abortion, Spontaneous↗

PubMedDate not supplied

Evaluation of early second trimester maternal serum creatine kinase isoenzyme BB as a marker of poor pregnancy outcome.

We hypothesized that maternal serum levels of the isoenzyme creatine kinase (CK)-BB, which is highly expressed in the placenta, may be elevated during the early second trimester in gestations destined to deliver prematurely or of a small-for-gestational-age infant (birthweight below 10th percentile). To test this hypothesis, we compared maternal serum CK-BB levels and percentage of CK-BB over total CK, in 69 normal pregnancies (delivering at term of appropriate-for-gestational-age infants) with those of 25 cases complicated by preterm delivery at < or = 34 weeks (n = 14), of a small-for-gestational-age infant (n = 8), or both (n = 3). No differences were present in maternal serum CK BB levels between normal and complicated pregnancies. Moreover, no correlation was found between gestational age at delivery and CK BB levels (r = 0.03; p = 0.7).

Adult↗