Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UNIPROT:P15088 (mast cell)
 14,925 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Basal and stimulated changes in ion transport in vitro were examined in jejunal mucosa from rats during inflammation produced after infection with the nematode Nippostrongylus brasiliensis. The gut was acutely inflamed at days 7 and 10 when net secretion of Na+ and Cl- ions was evident. Serum levels of rat mast cell protease II were elevated, providing evidence for mast cell activation. In addition, the magnitude of the short-circuit current responses to electrical transmural stimulation of enteric nerves (but not to histamine in the presence of neural blockade) were significantly reduced (p less than 0.01) to 17%-33% of control values, suggesting abnormalities of mucosal nerves. Following worm expulsion, serum levels of rat mast cell protease II and ion transport returned to normal. However, mastocytosis was apparent in gut mucosa and parasite antigen stimulated net secretion. In the absence of antigen, short-circuit current responses to nerve stimulation were increased (to 122% of controls; p less than 0.05). These findings suggest that changes in mast cells and enteric nerves occur during inflammation in this model and implicate neural and mast cell interactions with the epithelium in producing the ion-transport abnormalities.
 ...
PMID:Ion transport abnormalities in inflamed rat jejunum. Involvement of mast cells and nerves. 215 98

Mastocytosis comprises a heterogeneous spectrum of clinical manifestations, extending from isolated, benign skin infiltrates to systemic involvement, occasionally with a fatal outcome. After a short survey of the morphology and physiology of the mast cell and the skin lesions of mastocytosis, the involvement of internal organs is reviewed and the differential diagnosis is discussed. The options for therapy are discussed, and the need for continuous monitoring of mastocytosis patients is emphasized.
 ...
PMID:[The clinical spectrum of mastocytosis]. 219 96

Interstitial cystitis is rarely considered as a cause of urinary symptoms in referrals to gynaecology clinics. Recent concepts in the diagnosis of this condition mean that it is emerging as a much more common entity, with both early and late forms of the disease being described. Mast cell density in the detrusor muscle has been reported to be useful as a disease marker to substantiate the diagnosis of interstitial cystitis where no classical diagnostic features exist. We assessed mast cell counts in bladder biopsies from 27 women with idiopathic sensory urgency and 10 control patients about to undergo a colposuspension procedure for pure genuine stress incontinence; 30% of the study group had a clear increase in the detrusor muscle mast cell population (detrusor mastocytosis). No control patient showed such an increase. Early interstitial cystitis should be considered as a possible cause of lower urinary tract symptoms in patients with apparently idiopathic sensory urgency.
 ...
PMID:Do women with idiopathic sensory urgency have early interstitial cystitis? 220 41

The monoclonal antibody KP1 (CD68) was used to stain normal and neoplastic monocytes and macrophages in routinely processed, paraffin wax embedded tissue: mast cells also exhibited strong, consistent cytoplasmic immunoreactivity. Light microscopic findings were corroborated by electron microscopical and immunocytochemical findings. The predominant sites of immunoreactivity were the specific intracytoplasmic granules of the mast cells. All mast cell subtypes--that is, normal and reactive mast cells, such as those in lymph nodes exhibiting chronic non-specific lymphadenitis, and malignant or neoplastic mast cells in various types of mastocytosis--reacted with this antibody. This finding is of diagnostic importance, because mast cell proliferation could be mistaken for histiocyte proliferation. It also supports the hypothesis that mast cells derive from the bone marrow.
 ...
PMID:Use of monoclonal antibody KP1 for identifying normal and neoplastic human mast cells. 174 May 28

Systemic mastocytosis is an uncommon disorder of mast cell proliferation in connective tissues. Mast cell degranulation may occur on exposure to various stimuli and drugs. The release of histamine, heparin and vasoactive substances such as prostaglandin D2 may cause severe hypotension and other anaphylactoid manifestations. Anaesthetic management should include perioperative stabilization of mast cells and avoidance of the use of histamine-releasing drugs. Intradermal skin testing is useful in predicting the sensitivity to drugs that may be used during anaesthesia. We present a patient with systemic mastocytosis who underwent uneventful cholecystectomy.
 ...
PMID:Anaesthetic management of systemic mastocytosis. 222 49

Three (young) adults with severe generalized osteopenia and vertebral compression fractures were studied. Extensive clinical and laboratory investigations were not contributory. Undecalcified bone biopsies demonstrated multiple mast cell granulomas in the marrow in two patients and numerous mast cells diffusely distributed throughout the bone marrow in the third patient. Mast cells may serve as a pathogenic agent in osteoporosis. Therefore, we conclude that isolated skeletal mastocytosis without clinical evidence of mast cell mediator release should be sought in the evaluation of a patient with unexplained severe bone loss.
 ...
PMID:Osteoporosis as the sole presentation of bone marrow mastocytosis. 223 71

A 59-year-old male presented with systemic mastocytosis with extensive skeletal involvement resulting in vertebral compression fractures and bone pain. Histomorphometric analysis of bone revealed increased mast cells, elevated static parameters of bone resorption, and low bone formation. Serum calcium, phosphorus, and alkaline phosphatase were normal; however, serum 1,25-dihydroxyvitamin D3 and osteocalcin levels were low. Histamine levels in plasma and urine were elevated. Following therapy with ketotifen, the patient had resolution of bone pain along with decreased flushing and pruritus. Elevated plasma and urine histamine levels normalized, as did 1,25-dihydroxyvitamin D3 and osteocalcin levels. Indices of low bone formation improved on therapy. Eroded surfaces improved but remained elevated. This case is the first demonstration that bone symptoms and histomorphometric change in systemic mastocytosis are reversed with inhibition of mast cell degranulation. The role of mast cells and their products in bone metabolism is poorly understood, but the therapy of bone disease in systemic mastocytosis should include inhibition of the release of mast cell products along with the use of histamine antagonist.
 ...
PMID:Inhibition of mediator release in systemic mastocytosis is associated with reversal of bone changes. 227 Jul 75

We reviewed clinical and histological findings in 55 patients with interstitial cystitis and 21 with voiding dysfunction secondary to other pathological conditions. Of our interstitial cystitis patients 36% would fail to meet the research definition proposed at a recent National Institutes of Health workshop. Detrusor mastocytosis was present in 64% of our interstitial cystitis patients compared to 80% of the noninterstitial cystitis group. There was no statistically significant difference in mean detrusor mast cell counts between interstitial cystitis and noninterstitial cystitis patients. Biopsies of 12 patients who did meet the proposed National Institutes of Health research definition were evaluated by immunohistochemical techniques. Early results are inconclusive. These studies indicate that interstitial cystitis is a complex disease whose diagnosis presently still must be made from a symptom complex rather than from objective histological criteria, including mastocytosis or the presence of any specific immunoreactive cell.
 ...
PMID:Diagnosis of interstitial cystitis. 200 13

Lesional (n = 15) and non-lesional (n = 10) skin of subjects with mastocytosis was analysed for the distribution and concentration of trypase positive, chymase negative mast cells (MCT) and tryptase positive, chymase positive mast cells (MCTC) cells and compared to normal skin (n = 23) and non-lesional skin of subjects with unexplained anaphylaxis or flushing episodes (n = 6). Skin biopsies were fixed in Carnoy's fluid and subjected to double immunohistochemical staining with biotinylated mouse monoclonal anti-chymase antibody followed by alkaline phosphatase-conjugated mouse monoclonal anti-tryptase antibody. MCTC cells were the only type of mast cells seen in all specimens analysed and in each case were more numerous in superficial compared to deep regions of dermis. The concentration (mean +/- s.d.) of mast cells in the superficial dermis of mastocytosis lesions (40 985 +/- 21 772 mast cells/mm3) was significantly increased over that in corresponding areas of non-lesional skin from subjects with mastocytosis (7178 +/- 3607 mast cells/mm3), skin from subjects with idiopathic anaphylaxis or flushing episodes (6974 +/- 3873 mast cells/mm3) and normal skin (7347 +/- 2973 mast cells/mm3). The exclusive presence of MCTC cells in skin lesions of mastocytosis which are characterized by non-malignant hyperplasia of mast cells suggests involvement of local tissue factors in mast cell recruitment and differentiation.
 ...
PMID:Mast cells in cutaneous mastocytosis: accumulation of the MCTC type. 231 Sep 82

We have examined the ultrastructural characteristics of peroxidase activity in human bone marrow mast cells. These studies were performed in three patients with systemic mast cell disease, and in another six patients showing bone marrow mast cell hyperplasia. Endogenous peroxidase activity was localized in the perinuclear cisternae and strands of endoplasmic reticulum, but never in the granules. We have also demonstrated the "in vivo" existence of exogenous peroxidase activity in two of the three cases of systemic mast cell disease. The peroxidase internalization involved its binding to the plasma membrane, followed by its incorporation into the cell by a general endocytic process comprising the uptake of dispersed peroxidase-positive material mainly by phagocytosis of granular structures containing peroxidase. The exogenous peroxidase appeared in non-membrane bound granules, vacuoles or aggregates, but we have never seen the enzyme linked to the mast cell granules.
 ...
PMID:The fine structural localization of endogenous and exogenous peroxidase activity in human bone marrow mast cells under pathological conditions. 231 54


<< Previous 1 2 3 4 5 6 7 8 9 10 Next >>