Frequency of alloantibodies reacting with PHA-activated T lymphocytes, unexplainable by known HLA activities

Two hundred and three sera obtained from multiparous women were screened to determine the frequency of the appearance of antibodies reactive with PHA-activated T lymphocytes, but not with resting B or T cells from the same donor. The panel of cells on which the sera were tested consisted of lymphocytes from 38 unrelated donors known to be homozygous at the HLA-D locus. Forty-two sera were shown to react uniquely with PHA-activated T cells. The reactivities of these sera could not be explained in terms of the defined HLA-A,-B,-C, or DR antigen specificities on the panel cells, nor on the basis of known cross-reactivities among these antigens. Most of the antisera showed strong cytotoxicity with the activated T cells. Such sera may define antigens presented to the maternal immune system during differentiation and development, which are not expressed on adult T cells unless they are activated.

DR-positive maternal engrafted T cells in a severe combined immunodeficiency patient without graft-versus-host disease

A 2 1/2-year-old male infant with severe combined immunodeficiency was documented by HLA typing and the presence of a female karyotype in the few spontaneously dividing cells to have an intrauterine-derived maternal lymphocyte graft. The presence of DR antigens on the engrafted maternal E rosette-forming T cells was demonstrated by both cytotoxicity and immunofluorescence techniques using both conventional and monoclonal antihuman DR antisera. These DR antigens were of the same allospecificity, DR4, as the mother's peripheral blood B cells. The patient's B cells and monocytes expressed DR alloantigens DR4 and DR3, corresponding to his genotype. Although fresh maternal lymphocytes react strongly in vitro against patient non-T cells, the engrafted maternal T lymphocytes no longer show this activity. Furthermore, clinical evidence suggesting mild graft-versus-host disease was completely resolved by the end of his first year. The presence of the DR-positive maternal cells may reflect the survival of a group of activated suppressor cells mediating graft tolerance of host tissue.

Characterization of antigens from Aspergillus fumigatus. V. Reactivity in immunodiffusion tests with serums from patients with aspergillosis caused by Aspergillus flavus, A. niger, and A fumigatus

Antigen-rich mycelial extract (ME) and fractions of Aspergillus fumigatus were compared with culture filtrates of A. fumigatus. A. flavus, and A. niger for their abilities to detect antibody in serums from patients with confirmed aspergillosis caused by these fungi. In double immunodiffusion tests, homologous antigen preparations were more effective than heterologous preparations in detecting precipitins. Mycelial extract of A. fumigatus was more effective than A. fumigatus culture filtrate in detecting antibody in serums from patients with disease caused by A. flavus and A. niger. It did not, however, detect antibody in the serums from approximately half of the patients with heterologous infections.

Characterization of antigens from Aspergillus fumigatus. III. Comparison of antigenic relationships of clinically important aspergilli

Antigenic relationships between strains of Aspergillus fumigatus, Aspergillus fumigatus var. elipticus, Aspergillus phialiseptus, Aspergillus flavus, and Aspergillus niger were analyzed by fused rocket immunoelectrophoresis and by skin tests. Seventy-three to 89 % of the numbers of antigens detected between strains and species of the A. fumigatus series were shared. The degree of sharing between antigens of A. flavus, A. fumigatus series, and A. niger was much lower and ranged from 19 to 35 %. In reciprocal skin tests in sensitized guinea pigs, similar relationships were shown. Three fractions of A. fumigatus extract proved to be markedly specific for this species. Cross reactivity was associated primarily with carbohydrate and glycoprotein fractions.

Characterization of antigens from Aspergillus fumigatus. IV. Evaluation of commercial and experimental preparations and fractions in the detection of antibody in aspergillosis

Commercially available preparations of Aspergillus fumigatus, experimental extracts and fractions of A. fumigatus, and extracts of 5 other aspergilli were evaluated in a blind manner for their abilities to detect antibody in 66 serum specimens from patients with aspergilloma, allergic bronchopulmonary and invasive aspergillosis, and unconfirmed aspergillosis. Rocket immunoelectrophoresis was more sensitive than immunodiffusion in 2 dimensions. Although qualitative differences in antigen composition could be detected, commercial preparations compared favorably with the best experimental extracts in detecting positive specimens. Extracts from young, actively-growing myceliums were most effective and produced the largest numbers of precipitin bands. In contrast to all unfractionated preparations, several fractions of A. fumigatus were devoid of substances that react with C-reactive protein of serums, yet were as effective as the best preparations in detecting serums positive for Aspergillus.

Diastolic flutter of aortic valves in aortic regurgitation: a report of seven cases

Seven patients with aortic regurgitation, manifesting diastolic flutter of the aortic valve cusps (DFAVC) in the echograms, are described. Five patients with infective endocarditis revealed coarse or fine, irregular DFAVC. Two patients with severe aortic regurgitation and a musical murmur manifested regular DFAVC with a frequency identical to that of a simultaneously recorded diastolic murmur. Of the 5 patients with infective endocarditis, 4 required urgent aortic valve replacement and 1 died. The 2 patients with musical murmurs are clinically stable without surgery. This report extends the clinical spectrum of patients with DFAVC and describes the character of the flutter in patients with muscial murmurs. Furthermore, it suggests that DFAVC is a sign of severe aortic regurgitation.

Oxidation of formate by mycobacteria of the scrofulaceum group

Intact cells obtained from Mycobacterium scrofulaceum as well as from mycobacterial strains M.A6 and M.R56 isolated respectively from leprous tissues of armadillo and rat leproma and grown with glycerol as the oxidizable substrate catalyzed complete oxidation of formate. The stoichiometry of formate oxidase system yielded a value of 2 mol of CO2 produced per mole of O2 or per 2 moles of formate consumed. Cell-free preparations from these three strains of mycobacteria contained formate dehydrogenase which was associated exclusively in the particulate fraction. Formate oxidation was markedly stimulated by small amounts of selenite and molybdate added together. Formate-reduced minus oxidized difference spectra disclosed cytochromes of the b type while spectral evidence did not suggest the existence of cytochromes a or c components. The effect of 2-N-heptyl-4-hydroxyquinoline-N-oxide on the redox state of cytochromes indicated that formate oxidation was mediated by cytochrome b with absorption maximum of 556 nm and not of 562 nm.

Administration of a vaccine prepared from the Australian V4 strain of Newcastle disease virus by aerosol and drinking water

An experimental vaccine containing the avirulent Australian V4 strain of Newcastle disease virus was used to vaccinate 3-or 6-week-old chickens by aerosol and drinking water application. The chickens lacked maternally derived antibody to Newcastle disease virus. When the vaccine virus was diluted in tap water more than 90% of the infectivity was destroyed immediately. The addition of 0.25% skim milk prevented this loss and there was no loss in distilled water. Rates of inactivation at 37 degrees C were similar in tap water and distilled water and were unaffected by the addition of skim milk. Both methods of vaccination resulted in the production of haemagglutination-inhibition antibodies which persisted for at least 8 to 12 weeks. The antibody response to aerosol vaccination was significantly better than that following drinking water vaccination. No clinical disease was induced by exposure to vaccine virus. Serum neutralisation antibodies paralleled those detected by haemagglutination-inhibition in chicks vaccinate once by drinking water. After revaccination through the drinking water, haemagglutination-inhibition antibodies were boosted temporarily while neutralising antibodies were maintained at an enhanced level. From chickens vaccinated by aerosol, Newcastle disease virus was recovered for 10 days from lungs and for 7 days from tracheas and caecal tonsils. Peak viraemia was detected 2 and 3 days after vaccination while both neutralising and haemagglutination-inhibition antibodies became detectable 5 days after vaccination.

Characterization of antigens from Aspergillus fumigatus. I. Preparation of antigens from organisms grown in completely synthetic medium

Aspergillus fumigatus was found to grow well in completely synthetic asparagine glycerol medium. Four-day-old mycelia were totally disrupted by vigorous mechanical shaking with 0.45-micrometer glass beads. Such mechanically produced extracts contained at least 52 precipitating antigens. The number of protein and carbohydrate components was maximal in 4-day-old organisms and decreased in older cultures. Conversely, the number of components in culture filtrates increased with longer incubation periods, but was only approximately one-half that produced by the 4-day-old mycelial extracts.

Problems in ultrasonic estimates of septal thickness

Problems related to cardiac anatomy and ultrasonic instrumentation affect the accuracy of echographic identification of endocardial echoes. A cadaver model and 13 patients were studied, with direct identification or with the aid of echographic contrast techniques, to identify accurately the endocardial echo. The study showed that (1) echographic contrast agents delineate an endocardial echo in the central portion of the ultransonic beam; (2) a specular reflector exists within the right ventricular cavity; (3) specular reflectors within the septum may give the false appearance of border-forming echoes; (4) septal thickness varies by 1 to 5 mm after the endocardial echo has been identified by the contrast agent; and (5) spurious echoes, related to a wide beam angle, can be confused with the endocardial echo. In light of these problems, three criteria were utilized for endocardial echo identification: the prominent notch in the left septal echo, the specular quality of the right septal echo, and the association of multiple myocardial echoes moving in parallel. With these criteria, the endocardial echoes in 11 of the 13 patients could be accurately identified without the use of a contrast agent. The identification of these problems should provide helpful guidelines in developing more accurate and reproducible criteria for septal thickness measurements.

In vitro cultivation of mycobacteria in cholesterol lecithin media from lepromas of rats infected with Mycobacterium lepraemurium

In vivo grown M. lepraemurium suspensions were inoculated into a basal medium containing cholesterol and lecithin. Slow growing strains of mycobacteria were cultured regularly in these media. The presence of free cholesterol or cholesterol in serum or cholesterol in trypsin-digested egg yolk was essential for growth. The primary cultures were difficult to obtain, but the strains were easily subcultured. A heavy inoculum was necessary to obtain primary cultures in the liquid media, no growth occurred on semisolid agar slants. Similarly slow-growing primary cultures were obtained on Ogawa egg yolk media. Growth developed in a considerably shorter time if Ogawa's medium was enriched with 0.4% yeast extract (Difco). The cultures obtained on Ogawa egg yolk media were successfully subcultered in liquid cholesterol-lecithin media. The relation of the cultured strains of mycobacteria to the pathology of murine leprosy is not yet clear. The dynamics of cholesterol metabolism in the macrophages related to murine leprosy is discussed.

Musical murmurs: an echo-phonocardiographic study

Five patients with muscial murmurs were studied noninvasively with simultaneous echocardiography and phonocardiograpy and phonocardiography. Three patients had aortic regurgitation, one mitral regurgitation and one tricuspid regurgitation. The frequency of the muscial murmurs ranged from 40 to 158 cycles/sec. The patient with tricuspid regurgitation manifested an inspiratory honk. Simultaneous echo-phonocardiography revealed regular valve leaflet flutter (aortic, mitral or tricuspid) at a frequency identical to that of the simultaneously recorded muscial murmur. This study demonstrates that echocardiography is a useful noninvasive tool in identifying the site of origin of musical murmurs.

The isolation of lentogenic strains of Newcastle disease virus in Australia

Twelve isolations of Newcastle disease virus were made from 77 clinical samples from chickens from conjunctivitis, respiratory disease, proventriculitis and bursal atrophy. Nine of the isolations were made from chickens with conjunctivitis. The viruses were identified as Newcastle disease virus by inhibition of their haemagglutinins with specific antiserum to Newcastle disease virus. The viruses failed to kill chicken embryos after inoculation into the allantoic cavity and they were judged to be lentogenic strains. There was no evidence that the Newcastle disease viruses were responsible for any of the clinical conditions from which they were isolated. The presence of other agents in 10 of the samples was indicated by reduced production of haemagglutinin in allantoic fluids of infected embryos, by deaths of infected embryos, by the production of cytopathic changes in avian cell cultures and by electron microscopy. Three isolations of infectious bronchitis virus, 2 of avian adenovirus and one of avian reovirus were made. Other samples were suspected of containing infectious bronchitis virus and mycoplasmas, but these were not isolated. The Newcastle disease viruses failed to produce plaques in chicken embryo fibroblast cell cultures and they were separated from the contaminating agents by haemagglutination and elution followed by passage at terminal dilution in chick embryos. No Newcastle disease virus was isolated from 60 caecal tonsils and 60 lung samples from 9-week-old broiler chickens. Eight lung samples yielded mycoplasmas that caused haemadsorption in chicken cell cultures. The mycoplasmas were probably Mycoplasma gallisepticum.

Use of an avirulent Australian strain of Newcastle disease virus as a vaccine

One-day-old chickens were transported from Australia to Malaysia and vaccinated orotracheally with an uninactivated vaccine prepared from avirulent Australian V4 strain of Newcastle disease virus (NDV). The vaccination regimes were as follows: group A, once, at 2 weeks old; group B, once, at 3 weeks old; group C, twice, at 2 and at 3 weeks old; group D, direct contact with groups A, B, and C; and group E, indirect contact with groups A, B, C, and D. Group F was unvaccinated controls. Challenge was with NDV virulent Ipoh AF 2240-226 strain, administered at 4 weeks old intramuscularly to 10 chickens in each group and orotracheally to 10 chickens in each group. The remaining chickens were challenged by contact with the inoculated chickens. Group mortalities following challenge were: A, 1/77; B, 1/34; C, 0/39; D, 0/45; E, 6/43; and F, 60/60.

Improved survival-rates in presensitised recipients of kidney transplants by immunosuppression with maternal-source gamma-globulin

The effect on cadaver-kidney transplant survival-rates of a gamma-globulin concentrate, prepared from clotted blood centrifugally expressed from placental tissue recovered from postpartum women, was evaluated in a prospective controlled trial in 195 patients who were also given a standard immunosuppressive regimen. Allograft-survival rates were analysed according to whether or not the recipient had lymphocytotoxic antibodies before transplantation (responders) and whether the graft was a first or second transplant. The graft-survival rate was improved in responder-type recipients of first transplants who had received the gamma-globulin concentrate as adjunctive therapy (control group 28.8+/-10.1% vs. gamma-globulin 55.5 + 9.7% at 2 years, p less than 0.05). The survival-rate of grafts in non-responders was not affected by administration of gamma-globulin and data on its use in recipients of a second graft were insufficient for analysis. These results suggest that the gamma-globulin concentrate was suppressing immunological responses associated with humoral-type rejection.

Renal allograft fracture: clinicopathological study of 21 cases

Experience with renal allograft fracture occurring in 21 of 246 transplants performed over a 29-month period is reviewed. Clinical manifestations included pain and tenderness at the graft site, fever, and falling hematocrit. The fracture occurred without exception in the course of an acute rejection episode. Diagnosis was made from two days to seven weeks following transplantation; in 13 patients (62%) diagnosis was made within two weeks of surgery. Severe damage to the kidney necessitated nephrectomy in all but two transplants. Of those not removed at initial exploration only one regained function to permit a dialysis-free existance for several months. Histologic examination of the fractured kidneys revealed the pathogenesis to be acute rejection in 13 (62%), accelerated acute rejection in four (19%), and a combination of these processes in four (19%). Conclusions from this study are that fractures of renal allografts: (1) are more frequent than commonly realized; (2) are primarily due to the swelling of acute rejection; (3) are often characterized by sudden onset of pain in the region of the graft accompanied by fever and falling hematocrit; (4) should be treated by prompt surgical intervention to control hemorrhage, to perform nephrectomy if indicated, and to evacuate the hematoma in order to reduce the possibility of secondary infection.

Scleroderma kidney disease: a therapeutic approach with nephrectomy and hemodialysis

A 49 year old black female patient with progressive systemic sclerosis (scleroderma), multiple organ system involvement, uremia and malignant hypertension, was treated with maintenance hemodialysis and bilateral nephrectomy. Bilateral nephrectomy controlled refractory hypertension and appeared to alter the natural course of systemic sclerosis.

Determination of the equilibrium constants of self-associating protein systems. XI. The application of C-(r) in graphical analysis and the enumeration of interacting species in the ultracentrifuge

A greatly simplified procedure is proposed which employs C equals f(r) as determined from sedimentation equilibrium measurements in graphical analysis of self-associating protein systems and in the enumeration of interacting species in the ultracentrifuge. Basic equations given here are applicable to any self-associating system. A procedure is outlined for enumeration of interacting components independent of non-ideal behavior, using principal component analysis.

Relationship between polyene resistance and sterol compositions in Cryptococcus neoformans

Six mutants of Cryptococcus neoformans resistant to nystatin and pimaricin and three mutants resistant to amphotericin B were isolated by ultraviolet irradiation techniques from two wild-type strains. The major sterols of the wild-type strains were Delta(7)-ergosten-3beta-ol and ergosterol. All six mutants resistant to nystatin and pimaricin showed either loss of ergosterol and concurrent production of Delta(7, 22)-ergostadien-3beta-ol and Delta(7)-ergosten-3beta-ol, or loss of both the wild-type sterols, with production of Delta(8(9))-ergosten-3beta-ol and Delta(5, 8(9), 22)-ergostatrien-3beta-ol. The mutants producing Delta(7, 22)-ergostadien-3beta-ol and Delta(7)-ergosten-3beta-ol showed relatively low levels of resistance to nystatin and pimaricin, whereas the mutants producing Delta(8(9))-ergosten-3beta-ol and Delta(5, 8(0), 22)-ergostatrien-3beta-ol showed a high level of resistance to either drug. Although highly resistant to amphotericin B, however, the three mutants produced sterol compositions identical to those of the wild types, indicating that the strains acquired resistance other than by alteration of the membrane sterols. The mutants producing Delta(8(9)) and Delta(5, 8(9), 22) sterols were not virulent for mice, showed reduced growth rates at 25 C, and failed to grow at 37 C. The other mutants showed a slightly reduced rate of growth both at 25 and 37 C, and the virulence in mice was slightly reduced in comparison with that of the wild types. These comparisons were on gross observations and were not statistically analyzed.