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A sensitive immunocytochemical technique has been used to study the effect of Cordyceps Sinesis on the IgM and IgG antibody-forming cells in mouse spleen. The results indicate that after the mice have been treated for 7 days with Cordyceps Sinesis, their splenic nodules were increasing, the germinal centers became prominent and the marginal zones were thickening. The immunocytochemical results disclosed that a huge amount of IgM and IgG lymphocytes appeared in the splenic nodules, especially in the marginal zones, which were thickening due to the proliferation of the IgM-lymphocytes. In the red pulp, a large amount of IgM- and IgG-plasma cells were peripherally located in the terminal arteries or sinuses, indicating that it may be convenient for the plasma cells to release the antibodies into blood circulation. The results suggest that the Cordyceps Sinesis could stimulate the IgM-and IgG-lymphocytts to proliferate and promote the forming of antibodies.
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The morphology and distribution of pre-B cells and the changes of antigens during the differentiation from pre-B to B cells in fetal livers of different gestational ages were studied by means of immunohistochemical technique. The results revealed that at earlyfetal stage(between 9 and 29 weeks), the liver contained numerous pre-B cells, which were different in shapes and sizes, but their phenotypic expression was identical, for instance, 1gM, BA-1, HLA-DR and TdT all appeared positive. Most of pre-B cells were scattered in perisinusoidal space, only a few of them were present in sinusoids or around the blood vessels. After the 13the week, 1gD and 1gA positive cells began to appear, and the number of OKB-2 and Leul4 positive cells was markedly increased subsquently. Meanwhile, the number of the HLA-DR, Kappa and Lambda positive cells was increased accordingly, which indicated that the B cells became more mature. In view of absence of antigenic stimulation, the B cells failed to develop into plasma cells. Moreover, it was observed that the differentiation and maturation of the B cells in the fetal liver seemed to be independent on the T cells, because the B cells continued to generate even if the T cells were absent at early stage of fetal liver. It showed that the differentiation and the development of the B cells in the fetuses were mainly dependent on the liver microenvironment. This study provided an evidence for treatment of aplastic anemia and agammaglobulinemia with fetal liver between 9 and 20 weeks old.
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Leu 7 monoclonal antibody and immunohistochemical technic were used to study the distribution of NK cells in human lymph node, tonsil, spleen and thymus. The results indicated that the NK cells predominately distributed in B cell area, such as germinal center of secondary follicle, which occured in lymph node and tonsil. A few NK cells were found in the paracortex and medulla of lymph node. In the spleen, the NK cells mainly located in the germinal center of splenic nodules and in the periphery of white pulp. However, the NK cells were never shown in the perarterial lymphatic sheath, some NK cells also scattered in the pulp cord and sinuses of red pulp. In the thymus, the NK cells were restricted in the medulla, and the number of NK cells reduced in the aged thymus. In addition, the Leu 7 antibody was reacted with epithelial cells, which located in the cortical periphery or thymic lobule. The morphology of NK cells in different lymphoid organs was similar. The staining intensity of Leu 7 antibody was identical both in the frozen and paraffin sections.
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The mucous glands (sublingual gland, pyloric gland, main pancreatic duct gland, duodenum gland and large intestinal gland) have been studied-by means of labelled lectins and histochemical methods. The results indicated that a large amount of mucopolysaccharide with sailic acid are found in sublingual glands and pyloric glands, while a large amount of sulfate mucopolysaccharide are observed in the other three glands. In addition, the reactivity of DBA and PNA in mucous glands are different, for example, the sublingual and large intestinal glands are negative for DBA and PNA staining. On the contrary, the pyloric glands, duodenum glands as well as main pancreatic duct glands are heavily stained with DBA, but various between the mucous glands stained with PNA. The goblet cells in duodenum, large intestine and main pancreatic duct are similar in their morphology, but the reactions of PAS, AB and lectins are different between them, even so in the same organ, the staining pattern also differ from their locations. The mucous glands and goblet cells contained different mucopolysaccharides, which might be concerr/ed with different functions in different organs.
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Using immunoenzymatic technique,we have observed the localization ofimmunoglobulins in human palatine tonsils,of patients suffering from chronictonsilitis and hyperplasia.The result as follows:1.Epithelium:The outer surface of tonsil is lined by stratified squamous epithelium,the epithelium rarely shows keratinization and lacks a well-defind and continuousbasement membrane.In the basal layer of epithelium,it is reticular structure andspaces between the cords of epithelium cells are filled with Ig~+ lymphocytes andplasma cells,the reticular structure is particularly pronounced near the crypts.Thisspecial structure is regarded as an expression of active immune function.In thesuperficial layer of epithelium,the predominate cells are Ig~- small lymphocytes,maybe T lymphocytes.2.Follicle:All follicles have germinal centres,especially hyperplastic tonsils.The follicle has polarity,each follicle may be divided into three Zones(a b c),twozones(a b)form the centre of the follicle and the thired(c)is the mass of smalllymphocytes“capping”and enclosing the centre.The upper limits of zone(c)areoften indistinct,from the presence of many lymphocytes in the epithelium.Thedistribution of Ig~+ cells in follicle are different from their three zones.In the centre,IgG cells are most numerous,next most numerous are IgA~+ cells,and considerablyfewer IgM positive cells.In the c zone,only a few Ig~+ cells are seen(IgG IgM).Itis found that the germinal centre may produce more than one type of Ig,it differsfrom the report of Sordat,but quite agrees with Curran's result.However the numbersof cells containing the various types of Ig show a great difference.3.Other lymphoid tissue:The tissue between the follicles are rich in small Tlymphocytes and a few Ig~+ containing cells,this area was called thymic dependentarea.At an older age,this region is always enlarged,but the density of the cellswill decrease,meanwhile much connective tissues are seen in the stroma.
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9 fetal and 7 juvenile thymuses were used to identify the asteroid cells on the frozen sections by immunohistochemical method. The results indicated that the thymic medulla, except B cells, contains a type of larger cells with small cytoplasmic processes, which has in common with B cell antigens, such as 1gM, 1gA, Leu14, BA-1, HLA-DR and light chain-Kappa, but they do not express OKB-2. Moreover, the asteroid cells do not reactive with T cell antibody and follicular dendritic cell antibody, and lack of ANAE activity. The asteroid cells in the fetal thymus are constantly located in the corticomedullary region, while, in the juveniles, the asteroid cells are mainly distributed within medulla or in the vicinity of Hassall's corpuscles. As regards the function of asteroid cells is not clear. Based on their distribution, it is probably associated with T cell maturation. On the morphologic ground, the asteroid cells are similar to interdigitating cells in thymus, the relationship between them has been discussed.
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A series of monoclonal antibodies have been used to study the distribution of T and B lymphocytes and their subsets in human spleen (5 from normal human and 2 from patients with portal hypertension). The results indicate that the T cells are mostly located in the periarterial lymphatic sheath, and in which a few B lymphocytes can be seen. The B cells are concentrated in lymphoid follicles, but also contain some T lymphocytes such as Leu 1, Leu 3a and Leu 4 positive T cells, these cells are necessary for forming of germinal center. Whereas the marginal zone, is composed of a mixture of T and B cells as well as the T_(ac) positive cells. The red pulp is composed of a mixture of T and B ceils, but the T and B cells are distributed randomly. In this report, the LN-2 monoclonal antibody is used first to study the B lymphocytes in human spleen. So far it is a unique antibody to react with nuclear membrane of B lymphocytes, the activity of LN-2 antigen do not influenced by B-5 fixation and paraffin embedding. From our data, there is no difference in staining feature and charateristic distribution between the normal human spleen and spleen of portal hypertensive patients. Although the periarterial lymphatic sheath in cases with portal hypertension seems to be narrower than the normal.
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0.05), but in the HP + group, the D cells markedly reduced as compared with HP - group and showed a significantly difference(P
