Subpopulations of T-lymphocytes in Peyer's patches: sensitivity to antilymphocyte serum and adult thymectomy.

Anti-lymphocyte (ALS) treatment or adult thymectomy of the donor have been shown to depress respectively the cell proliferation and the cytotoxicity in the graft-versus-host (GVH) reaction. A quantitative assay and the histological criteria of the GVH reaction have been used to demonstrate that all the known subpopulations of T-lymphocytes involved in the GVH reaction are present in the Peyer's patches as well as in the spleen and mesenteric lymph nodes in the rat.     

Presence of natural killer cells in Peyer's patches of the mouse

Summary Natural cell-mediated cytotoxicity of normal murine Peyer's patch cells against Ehrlich ascites carcinoma was found in a short-term⁵¹Cr release assay. Peyer's patch and lymph node cells showed natural cytotoxicity at approximately the same level.Acknowledgments. This work was supported by grant No. 10.5 from the Polish Academy of Sciences.     

Phagocytosis of latex particles in vitro: Effects of antilymphocyte and antithymocyte serum

Résumé Etude des effects des sérums antilymphocytes sur la phagocytose in vitro par les macrophages de la rate et du péritoine de la souris. L'inhibition partielle de la phagocytose a été transitoire; les cellules macrophages ont récupéré leur capacité fonctionelle deux jours après l'administration de sérum antilymphocyte.     

Effect of thymectomy on immune response in adult rats

Zusammenfassung Röntgenbestrahlung thymectomi-sierter Ratten ergab eine abgeschwachte Immunreaktion. Für eine Immunreaktion adulter Tiere scheint jedoch der Thymus nicht notwendig zu sein. In Abhängigkeit von Zeit und Alter der Tiere zeigten sich Unterschiede in der Stärke der Immunreaktion.     

T-Lymphocyte regulation of contact sensitivity: effect of thymectomy in adult mice]

6 weeks after adult thymectomy (ATx) in the Mouse, the contact sensitivity reaction to dinitrofluorobenzene (DNFB) is enhanced. 4 to 7 months after ATx, this reaction is deeply, but incompletely depressed, whereas the concomitant antibody response is not affected. These results suggest that both a suppressor, and an amplifier, T lymphocytes, the life span of which is different after ATx, are involved in the regulation of contact sensitivity. The effect of circulating thymic factor on this reaction suggests that this factor acts exclusively, at least in short treatments, on the suppressor function.     

Effect of thymectomy on lipoprotein lipase activity in the serum and the heart of rats

Zusammenfassung Entfernung der Thymusdrüse führt zu einer Abnahme des Gehaltes an Lipoprotein-Lipase in Serum und Herzmuskel der Ratte. Die Veränderung wird im Verlaufe der ersten 3 postoperativen Wochen als signifikant betrachtet.     

Activity of the reticuloendothelial system following exposure to electric stress and thymectomy

Summary After electric stress stimulation, granulopectic activity is reduced in otherwise normal rats, whereas it appears to be increased in thymectomized animals. The differences between the 2 groups of animals seem to support the hypothesis that the effects of stress upon the overall phagocytic capacity may be mediated by the products of lymphocyte breakdown.The collaboration of Prof. A. Colombi for the statistical analysis of the experimental results is gratefully acknowledged.     

The effect of glycine on serum luteinizing hormone in adult female rats

The response of serum luteinizing hormone to glycine has been studied during the estrous cycle in adult female rats. I.p. administration of 200 mg of glycine significantly elevated serum luteinizing hormone levels at all stages of the estrous cycle.     

The effect of glycine on serum luteinizing hormone in adult female rats

Summary The response of serum luteinizing hormone to glycine has been studied during the estrous cycle in adult female rats. I.p. administration of 200 mg of glycine significantly elevated serum luteinizing hormone levels at all stages of the estrous cycle.The authors wish to express their gratitude to Dr A.F. Parlow, NIAMDD Rat Pituitary Hormone Program, for the kind supply of radioimmunoassay kits.     

Pathological changes in inbred strains of mice following early thymectomy and irradiation

Summary Mice subjected to thymectomy and irradiation were found to develop a range of pathological change in various organs. These changes were accompanied by antibodies to a variety of self-components. The pattern of pathological and autoimmune change was found to vary with the strain. This strain-related expression did not appear to be associated with the major histocompatibility complex (H-2).This study was partly supported by the National Health and Medical Research Council of Australia.Author for correspondence and reprint requests.     

Circadian variation of serum testosterone in the adult male rat with a late morning acrophase

Summary Serum testosterone concentrations were measured in adult male Sprague-Dawley rats. A significant circadian testosterone rhythm (p<0.01) was found with peak values at 10.00 and 13.00 h.Supported in part by NIH, NCI Grant No. CA 15062 and NIH, NIAMDD Grant No. 5 RO1 AM11376.The authors would like to acknowledge the excellent technical assistance of Ms.Kris Strom.     

Sensitivity of crayfish muscle fibers to glutamate and to natural transmitter in low calcium solutions]

The response of crayfish muscle fibres to glutamate, a putative transmitter at its excitatory motor synapses, decreases when extracellular calcium is reduced, whereas the sensitivity to natural transmitter s not modified. Three possible mechanisms are proposed.     

Triiodothyronine and thyroxine: Induction of mitosis in adult forgs

Zusammenfassung Nachweis, dass bei adulten, reifen Fröschen Thyroxin und Triiodothyronin die mitotische Aktivität und die DNS-Synthese in verschiedenen Organen (Augenlinse, mit Epithel, Niere Darm, Leber, Milz, Haut, Horn-und Nickhaut) zu stimulieren vermag.

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This work was supported by USPHS Grant No. EY 00281-09 from the National Eye Institute, and Fight for Sight Grant-in-Aid No. G-496.     

Protracted analgesia in young and adult rats maternally exposed to methadone

Summary The analgesic response to the hot-plate test was studied in 21-, 45-, 60-, 120- and 300-day-old rats maternally exposed to methadone (5 mg/kg). An elevation in nociceptive threshold, in the absence of further exposure to methadone, was observed in young and adult rats perinatally subjected to methadone.This research was supported by grant DA 01618.     

Binding of tryptophan to different serum proteins in humans and in rats

Riassunto Sieri di uomo e di ratto sono stati incubati con C¹⁴-l-triptofano e sottoposti a elettroforesi su gel di poliacrilamide. Nel siero umano la radioattività si è localizzata nelle frazioni albuminica, prealbuminica e macroglobulinica. Nel siero di ratto il C¹⁴-l-triptofano si è localizzato nella zona delle albumine, -globuline e macroglobuline.     

Sensitivity ofBotrytis cinerea Pers. to elemental sulfur in the presence of surfactants

Summary The sensitivity ofBotrytis cinerea Pers. to elemental sulfur is enhanced in surfactant solutions (Triton X-100 or SDS). The role of surfactants in the change of permeability to sulfur is discussed.The authors thank Drs D. Gindrat and R. Peck for critical reading and helpful suggestions.     

Sensitivity of the Na efflux in barnacle muscle fibres to the microinjection of troponin-C

Zusammenfassung Nachweis, dass eine Microinjektion von Troponin-C den Na-Ionen-Ausfluss aus Einzelfasern des Entenmuschel-Muskels steigert.