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Newborn male rats were subjected to a mechanical lesion of the left cerebral hemisphere. Thereafter, a single dose 5 or 500 units (U) of recombinant rat interleukin-1beta (IL-1beta) was injected into the lesion cavity. One or 2 days after the injury, the rats were injected with 3H-thymidine to label dividing cells. Brain sections were subjected to GFAP immunocytochemistry or BSI-B4 lectin histochemistry to visualise astrocytes or macrophages, respectively. Autoradiography was used to detect cells proliferating within the region of injury in the immunocytochemically stained brain sections. The strongest mitogenic effect of IL-1beta on astrocytes (labeling index) was observed on day 1 after injury while a dose-dependent increase in their GFAP-immunoreactivity occurred on day 2. At 500U dose, IL-1beta significantly reduced infiltration of macrophages on posttraumatic days 1 and 2 but did not influence their proliferation. Thus, effects of IL-1beta on the occurrence of macrophages were opposite to those on the GFAP-immunoreactivity of astrocytes and their proliferation. It appears to suggest existence of different mechanisms controlling reactive behaviors of the two cell populations.

Authors offer the case report of a patient with metastatic non differentiated carcinoma of sternum simultaneously suffering from ischemic heart disease. The patient underwent actinotherapyhyperthermia followed by resection of sternum and coronary artery bypass grafting in one session. Chest wall defect was closed by means of latissimus dorsi muscle rotation. Postoperative palliative chemotherapy started 16 weeks postoperatively. Primary tumor was not found, neither preoperatively nor during the 36 months' postoperative remission.