Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0026764 (multiple myeloma)
 36,148 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Somatic cell hybrid clones were isolated from the fusion of RPC 5,4 mouse myeloma cells and B lymphocytes from three patients with agammaglobulinemia. One patient had X-linked agammaglobulinemia; the remaining two patients had common varied agammaglobulinemia. All three patients had B lymphocytes which fail to secrete immunoglobulin. The hybrid nature of the clones was established by examination of metaphase chromosome spreads. Most of the clones from all three patients expressed surface immunoglobulin of mouse and human parental origin. Clones from two of the patients had fewer cells with surface Ig than hybrids from normal persons, while clones from the third patient had large numbers of surface Ig fluorescent cells. Most of the clones from all three patients synthesized and secreted human and mouse immunoglobulin. As determined by sodium dodecyl sulfate acrylamide gel electrophoresis of radioactively labeled proteins, clones from each of the patients produced human gamma, alpha, and mu-heavy chains. These studies demonstrate the presence of functional structural genes coding for human immunoglobulin heavy chains in B lymphocytes of patients with agammaglobulinemia. Further, they represent induction in the somatic cell hybrids of a gene product not expressed in the parental B lymphocytes.
 ...
PMID:Induction of human immunoglobulin synthesis and secretion in somatic cell hybrids of mouse myeloma and human B lymphocytes from patients with agammaglobulinemia. 10 May 74

Somatic cell hybrid clones were isolated from the fusion of RPC5.4 mouse myeloma cells and B lymphocytes from a patient with common varied agammaglobuinemia. The patient has B lymphocytes that synthesize immunoglobulin but fail to secrete immunoglobulin. The hybrid character of the six clones was established by examination of metaphase chromosome spreads. Most of the hybrid clones expressed mouse and human surface immunoglobulin. All of the clones synthesized immunoglobulin of mouse and human parental origin. Mouse parental immunoglobulin was secreted, whereas the human parental immunoglobulin was not secreted. Human light chain molecules were secreted as part of hybrid H2L2 molecules formed with mouse heavy chains. Human heavy chains had a reduced m.w. in comparison to the mouse heavy chains. Kinetic experiments indicated that human Ig was synthesized in amounts that were comparable to the mouse Ig. Pulse-chase experiments showed that that the intracellular human Ig was removed from the cytoplasm, probably by degradation. These experiments demonstrate that the hybrid cells are an in vitro model of naturally occurring failure of immunoglobulin secretion from agammaglobulinemia. The failure of fusion with mouse myeloma cells to complement the secretion defect suggests that these B cells produce an altered immunoglobulin molecule that is not programmed for secretion.
 ...
PMID:Somatic cell hybrids of mouse myeloma cells and B lymphocytes from a patient with agammaglobulinemia: failure to secrete human immunoglobulin. 10 16

Fusion of unfractionated human lymphocytes with mouse myeloma cells resulted in proliferating hybrid colonies, almost all producting human Ig. We examined whether this high frequency of Ig production was the result of selective formation of human B lymphocyte-mouse myeloma hybrids, rather than induction of Ig genes in T lymphocytes. Unfractionated peripheral lymphocytes and B lymphocytes from patients with the common variable form of agammaglobulinemia formed proliferating somatic cell hybrid colonies. In contrast, peripheral lymphocytes from a patient with agammaglobulinema who lacked B lymphocytes, as well as albumin gradient fractions of peripheral blood which do not contain B lymphocytes, failed to produce somatic cell hybrids with three different myeloma parent cell lines. B, T, and precursor lymphocytes all had Sendai virus receptors, as witnessed by viral agglutination. We conclude that fusion of human lymphocytes with mouse myeloma cells results in selective hybrid formation, rather than activation of Ig genes in disparate cell types. Only B lymphocyte-mouse myeloma heterokaryons form hybrid cells.
 ...
PMID:Human lymphocyte-mouse myeloma somatic cell hybrids: selective hybrid formation. 30 22

A series of suppressor cell systems regulate virtually all immunologic processes. Disorders of these systems have been identified in association with a number of diseases. An abnormal number of activated suppressor T-cells have been seen in some patients with common variable hypogammaglobulinemia and in some with selective IgA deficiency. Suppressor T-cells that inhibit immunoglobulin synthesis also develop in an animal model of immunodeficiency, the agammaglobulinemia of the bursectomized bird. Non-T-cell suppressor cells are a pathogenic factor in the humoral immunodeficiency associated with multiple myeloma. At the other end of the spectrum of immunologic response, a reduction in functional activity of suppressor T-cells has been implicated in the pathogenesis of autoimmune diseases. The disorders of suppressor cells that have been shown in immunodeficiency and autoimmunity are important when developing rational strategies for prevention and therapy of these immunologic disorders.
 ...
PMID:Disorders of suppressor immunoregulatory cells in the pathogenesis of immunodeficiency and autoimmunity. 30 22

The introduction of preparations of immune serum globulin that are safe for intravenous use (IVIG) has made possible safe and effective prophylactic treatment for patients with a variety of humoral immunodeficiencies. These include not only primary agammaglobulinemia and common variable hypogammaglobulinemia but also the antibody deficiencies that accompany chronic lymphocytic leukemia (CLL) and multiple myeloma, as well as the hypogamma-globulinemia found in very low birth weight newborns who have not received adequate transplacental IgG from their mothers. In contrast, trials to date have not shown efficacy of IVIG in preventing sepsis in burn patients. The ease of administration and efficacy of IVIG in preventing respiratory symptoms in hypogammaglobulinemic patients has suggested that many other patients presenting with sinusitis and asthma, recurrent bronchitis, and other chronic chest symptoms might also benefit from IVIG and that they should be worked up for IgG subclass or specific antibody deficiencies. Side effects of IVIG administration are generally minor and may be prevented by slow administration and/or pretreatment with aspirin or Benadryl. The only contraindication to IVIG treatment is anaphylactic sensitivity to IgA, which is extremely rare. IVIG is thus an effective and safe form of prophylaxis that can reduce the incidence of pneumonia and other respiratory infections in patients with antibody deficiency as a predisposing factor.
 ...
PMID:Role of gamma globulin. 251 39

Human bone marrow lymphoid cells, particularly when enriched with plasma cells, as in multiple myeloma, respond to pokeweed mitogen and to antiserum to immunoglobulin but not to phytohemagglutinin. Cells of patients with X-linked agammaglobulinemia of the bursal deficient type failed to respond to either pokeweed or to the antiserum to immunoglobulin. Leukocytes of the agammaglobulinemia patients however responded in a normal fashion to phytohemagglutinin. Just as the in vitro response to phytohemagglutinin is taken as an index of the thymus-dependent system, the in vitro response to both antiserum to immunoglobulin and pokeweed may be considered an index for the bursaldependent system. Human bone marrow, therefore, contains bursal cells and probably very few or no thymus cells.
 ...
PMID:Bone marrow: the bursa equivalent in man? 500 11

Cutaneous cryosurgery refers to localized application of freezing temperatures to achieve destruction of skin lesions. It can be used to treat a broad range of benign and premalignant skin conditions, and certain malignant skin conditions, with high cure rates. Cellular destruction is accomplished by delivery of the cryogen via dipstick, probe, or spray techniques. It is widely used in primary care because of its safety, effectiveness, low cost, ease of use, good cosmetic results, and lack of need for anesthesia. Cryosurgery is as effective as alternative therapies for most cases of molluscum contagiosum, dermatofibromas, keloids, and plantar or genital warts. It is a more effective cure for common warts than salicylic acid or observation. Cryosurgery is generally the treatment of choice for actinic keratosis. Contraindications to cryosurgery include cryofibrinogenemia, cryoglobulinemia, Raynaud disease, agammaglobulinemia, and multiple myeloma. Complications from cryosurgery include hypopigmentation and alopecia, and can be avoided by limiting freeze times to less than 30 seconds. Referral to a dermatologist should be considered in cases of diagnostic uncertainty or for treatment of skin cancer, which requires larger amounts of tissue destruction, resulting in higher complication rates.
 ...
PMID:Cutaneous cryosurgery. 2331 84