Biomedical subjects
Publications and source records attributed to H Kirchner.
Described in this paper is prepartum diagnosis of an encephalomeningocele in the 32nd week of pregnancy. Reference is made to real case histories to expound the importance of amniography, including indications and counterindications. Complications implied in using the method are mentioned.
Transabdominal amniocentesis, applied to 150 patients, is reported in this paper. Reference is made also to briefing of the patient, technique, indications, and complications.
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A panel of established cell lines and many primary cell specimens from lymphomas and leukemias as well as from normal lymphatic tissues were tested for tumorigenicity by intracranial heterotransplantation in nude mice. Not only lymphoma and leukemia cell lines, but also lymphoblastoid cell lines, lacking markers of malignancy, were tumorigenic in the brains of nude mice. These findings indicate that tumorigenicity following intracranial heterotransplantation in nude mice cannot be used as proof for the malignant nature of established cell lines. Heterotraplantation of primary cell specimens yielded only a few tumor takes. When primary cells were infected with exogenous Epstein-Barr virus prior to the transplantation procedure, tumorigenicity could be significantly increased. Cytogenetic evaluation of tumors growing after intracranial transplantation of human hematopoietic cells showed, in some cases, a selection of cytogenetically aberrant cell clones.
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Little has been made previously of the observation that interferon is generated in the murine mixed lymphocyte reaction (MLR). We have found high levels of interferon in the supernatants of MLR between spleen cells of mice of different H-2 type after one to two days of culture. Interferon production was also seen in strain combinations that differed only in the K or D region of the H-2 complex. There was no production of interferon in strain combinations differing in the M locus or in the I region of the H-2 complex. The latter combinations are known not to induce cytotoxic effector cells. Thus, there seems to be a dichotomy in allogeneic determinants between those of the I region and of the M locus inducing primarily lymphoproliferation, and those of H-2K and H-2D inducing cytotoxic activity and interferon production.
Interferon production occurs after two days of culture in murine mixed lymphocyte cultures (MLC). This was demonstrated in various combinations of mouse spleen cells differing at the major histocompatibility (H-2) locus. Interferon production could be demonstrated in one-way MLC when F1/parent combinations were used and in reactions in which one partner was treated by puromycin. After treatment of both cell populations with mitomycin C, interferon production occurred in the absence of lymphoproliferation. Interferon production in response to alloantigen did not occur in spleen cell cultures of nude mice and in cultures treated by anti-theta antiserum plus complement indicating that interferon production is a T cell-dependent function.
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Human B lymphocytes prepared from adult blood or cord blood by the use of neuraminidase-treated sheep red blood cells which did not respond mitogenically to phytohemagglutinin or pokeweed mitogen, responded well to the B95-8 strain of Epstein-Barr virus, but not to the P3HR-1 strain, with increased incorporation of tritiated thymidine. Replication of herpes simplex virus could be demonstrated in cultures of B lymphocytes preincubated with the B95-8 strain.
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By inventing the "rooming in", the organisational prerequisites for the undisyurbed early mother--child relationship, which is of fateful relevance for the newborn, are provided. Since part of the responsibility for the child is transferred to the mother already in the hospital, an adequate instruction is necessary. Thus, a change is taking place pertaining to the tasks of the nursing personnel. In an inquiry made on 950 female patients, the social-psychological aspects of the "romming in" were examined and evaluated. The joint accommodation of mother and child ought to be available on request for approximately 50% of the delivered women. During the night the newborns should be taken to the nursery. This meets with the needs of many women for undisturbed rest during the night despite "rooming in" and also with the necessity for control of the newborns by the nursing staff. The general judgment of the patients on a clinic cannot be changed essentially by the invention of "rooming in". This is depending to a great extent on various other factors.
Results of HCG-determinations in human serum and cystfluid of benign mammary tumors are presented. HCG was determined gy RIA in 40 samples from 30 patients with different forms of fibro-cystic mastitis. In 60% of the cases positive results were obtained. It is still unclear, whether the demonstrated substance is native HCG, a free beta-subunit, a mixture of both or a different substance with immunologic properties similar to those of HCG.
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Subcutaneous mastectomy is a real precaution to third-order mastopathy, and it is urgently indicated for therapeutic action on carcinoma in situ, since the incidence of invasive carcinomas to accompany such diseases is between ten and 25 per cent. Proliferative forms of mastopathies were recorded from 768 in 2,563 surgically treated women, with atpical tissue being found in 164 cases. Carcinoma in situ was established from 28 women. Indications, limitations of the method, surgical technique, and complications are discussed against the background of results obtained from 31 subcutaneous mastectomies.
The producer cells of interferon were studied in human leucocyte cultures stimulated by a variety of stimulants, including phytohemagglutinin (PHA), pokeweed mitogen (PWM), Corynebacterium parvum (CP) and Herpes Simplex Virus (HSV). When the cells were fractionated by the use of neuraminidase-treated sheep red blood cells (SRBC), the T cell population responded with interferon production to PHA and PWM but not to CP or HSV. However, the non-T population showed a vigorous response to the latter two stimuli. In contrast, nylon column eluate cells enriched for T cells responded well to CP and HSV with production of interferon. To resolve these contradictory data, we have used combinations of techniques. Nylon column eluate cells were further separated by SRBC and it was found that the nylon non-adherent rosetting cell did not produce interferon in response to HSV or CP whereas the nylon-nonadherent non-rosetting cell did. In additional experiments more elaborate techniques were used. Leucocytes were treated by plastic adherence and iron filings, passed over a nylon column and subsequently over an Ig-anti-Ig column, and then rosetted with SRBC. Again only the non-rosetting population produced interferon. In parallel experiments the capacity of the different cell populations to lyse three types of target cells in a chromium release assay as a test for "natural killer" (NK) cell activity was investigated. There was some correlation between interferon production and NK cell activity. Thus, our data indicate that interferon is produced by non-T, non-B cells, possibly by cells related to NK cells.
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Two long-term cell lines were established in vitro from the peripheral blood of a patient with plasma cell leukemia: one line with plasma cell proliferation, the other with lymphoblastoid cell proliferation (LCL). The 9-month-old plasma cell line showed the typical morphology of plasmoblasts. The cells neither had B- nor T-lymphocyte characterisitics, were EBV negative, and showed aneuploidy with various marker chromosomes, including the 14 q+ marker. The cytogenetic findings indicate a monoclonal proliferation of the plasmacells. No tumor growth in thymusless nude mice could be induced upon intracranial inoculation with these cells. In contrast, the autologous LCL, cultured after addition of exogenous EBV, showed the characteristic markers of lymphoblastoid cells, with the typical morphology of pear- and handmirror-shaped lymphoblasts, growing in clumps. They had C3- and Fc-receptors, surface-Ig, E-rosette-negativity, a diploid karyotype, and EBV dependent macromolecule synthesis. They lymphoblastoid cells produced intracranial tumors in nude mice in 8 out of 8 attempts.