Electrophysiological and histological study of synaptic connections between lateral geniculate transplant and host visual cortex

The lateral geniculate nucleus (LGN) of fetal Wistar rats was transplanted to the visual cortex (VC) of 33 neonatal Wistar rats. Histological examination showed transplanted cells in all the host brains. Intensively labeled cells were demonstrated in the transplant by labeling with true blue. Electrophysiological studies with brain slice preparations demonstrated that the transplanted LGN sent axons and made excitatory monosynaptic connections mainly in layer IV of the VC area 17. Corticogeniculate projections were also demonstrated in the transplanted LGN.     

Immunolocalization of 67 kDa elastin-binding protein in perinatal rat lungs

Summary 67 kDa elastin-binding protein (RL-67EBP) has been isolated from neonatal rat lungs by the use of an elastin-coupled affinity column, followed by elution with either lactose or synthetic elastin hexapeptide (VGVAPG), and immunohistochemistry has been used on perinatal rat lungs to determine the tissue localization of this protein. No immunoreactive structures occur in fetal lungs, or in the lungs of day-1 and-4 neonates. On day-7 after birth, immunoreactive cells appear in the subepithelial connective tissue of the intrapulmonary airways, from day-10 on, these cells become evenly distributed in the alveolar parenchyma. Occasionally, some cells occur in the alveolar air space, being free from the surface of the alveolar septum. Unpermeabilized cells obtained by bronchoalveolar lavage, show cell surface immunoreactivity, indicating that RL-67EBP is expressed on the surface membrane of the cells. From these findings, it is suggested that the immunoreactive cells are blood-borne monocytes, and that RL-67EBP may function as an elastin peptide receptor by which monocytes mobilize through interstitial connective tissue during their migration from blood to alveolar air space, where they eventually differentiate into alveolar macrophages.     

Primary malignant lymphoma of the uterine corpus and cervix. Report of a case with immunocytochemical analysis

In a 69-year-old woman, a gynecologic smear was the first indication of the presence of a nonepithelial malignant tumor. While first thought to represent an adenocarcinoma, malignant lymphoma was later cytologically suspected because of the presence of isolated large malignant cells with macronucleoli. The initial clinical and histologic studies failed to indicate a malignancy. The malignant cells in postoperative tissue samples showed a positive immunohistochemical reaction for leukocyte-common antigen (LCA) and a negative reaction for epithelial membrane antigen, confirming the cytologic suggestion of a uterine lymphoma. Immunocytochemical staining subsequently performed on the destained cytologic specimen gave a positive immunoreactivity to LCA in the cytoplasm of the malignant cells.