Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: EC:3.2.1.36 (hyaluronidase)
 4,606 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Three lysosomal polysaccharidases were measured in synovial fluid (SF) and serum from rheumatoid (RA) patients, SF from osteoarthritic (OA) patients, and serum from healthy volunteers. (1) There was no correlation between the enzyme levels and white cell counts in the SF. (2) beta-glucuronidase and beta-N-acetylglucosaminidase were markedly elevated in the SF of RA as compared to OA. (3) beta-glucuronidase and beta-N-acetylglucosaminidase levels in the SF of RA correlated well with each other but not with hyaluronidase. (4) beta-glucuronidase and beta-N-acetylglucosaminidase levels were higher in the SF of RA than in the corresponding serum, while the converse was true for hyaluronidase. (5) Hyaluronidase levels were significantly higher in RA serum than in normal serum. These results suggest that the synovial membrane may be the source of beta-glucuronidase and beta-N-acetylglucosaminidase, while hyaluronidase is derived from a source remote from the joint via the serum. This source of hyaluronidase may be the liver. (J Rheumatol 2: 393-400, 1975).
 ...
PMID:The origins and relative distribution of polysaccharidases in rheumatoid and osteoarthritic fluids. 120 71

Hyaluronidase activity of human endometrial tissues and uterine fluids was investigated. Endometrial tissue and uterine fluid specimens were obtained from normal human subjects, and different cases of uterine dysfunction induced by steroidal contraceptives, copper IUD, lactational amenorrhea, and in early pregnancy. Hyaluronidase activity was found to increase from Cycle Days 8 to 10 and reach the maximum value during the secretory phase. Hyaluronidase activity was reduced in both endometrial tissue and uterine fluid during lactational amenorrhea and early pregnancy, and was drastically reduced in copper-IUD and steroidal contraceptive users. The low hyaluronidase activity in the early phase of the cycle may be due to rapid growth of endometrial tissue. In the secretory phase, the corresponding activities were found to increase because of high secretory activity and enhanced catabolic processes. In early pregnancy, the low lysosomal enzyme activity may also be explained on the basis of increased endometrium tissue growth. Low hyaluronidase activity of amenorrhic subjects may be due to the absence of ovarian steroids.
 ...
PMID:Hyaluronidase activity of human endometrial tissues & uterine fluids. 121 11

A new biomaterial containing covalently bound hyaluronidase was prepared. An application of this enzyme membrane is to improve the performance of an implantable fuel cell. Hyaluronic acid is a contributor to the viscosity of tissue fluids but can be a potential fuel source because of its sugar content. The incorporation of immobilized hyaluronidase would not only contribute to a more available fuel supply by splitting hyaluronic acid but, perhaps more importantly, enhance the rate of mass transport of fuel, O2, and reaction products by reducing the viscosity near the electrode membranes. Hyaluronidase was bound to Sepharose gel and its thermoplastic membrane after activation by cyanogen bromide. Fourteen and 22% of the activities were recovered from the gel and membrane, respectively. The activity of the bound enzyme was stable for six months at 0 degrees C. The addition of hyaluronic acid, 1 mg/ml, to a typical implantable type bioautofuel cell in vitro increased external solution viscosity from 1.1 to 2.5-2.8 cP and reduced voltage output under 10 komega by 60% in 3 hr. When the hyaluronidase bound membrane was placed at the anode, viscosity of the glucose-hyaluronic acid solution was lowered to 1.8 cP and the cell output increased to the original level of a glucose-fueled cell in 3 hr. Glucosamine-equivalent released from hyaluronic acid at the electrode was 3.1 mg after 22.5 hr. This represents 90% of the theoretical consumption. Restoration of the cell output was probably a combination of the enhanced transport of fuel, O2 and products, and/or appearance of a new fuel, glucosamine-equivalent.
 ...
PMID:Hyaluronidase-bound membrane as a biomaterial for implantable fuel cells. 125 16

In anesthetized open chest dogs, hydrocortisone (50 mg/kg body weight administered 30 minutes after occlusion and 25 mg/kg 12 hours later) substantially reduced the size of myocardial infarcts, as reflected by both myocardial creatine phosphokinase activity and histologic appearance 24 hours later. Similarly, hyaluronidase, which increases diffusion through the extracellular space and presumably facilitates delivery of substrate to ischemic cells, also reduced the extent of myocardial necrosis after coronary occlusion in the dog. In view of the salutary effects of hyaluronidase and the absence of serious side effects, this agent was administered clinically to two groups of patients, who were compared with two groups of untreated control subjects. Hyaluronidase (500 National Formulary units/kg X 8) was shown to result in a significantly more rapid reduction in the magnitude and the extent of precordial S-T segment elevations, and in patients treated within 4 hours a tendency to a lower incidence rate of Q waves and a smaller reduction of R waves.
 ...
PMID:Effects of hyaluronidase and hydrocortisone on myocardial necrosis after coronary occlusion. 125 92

Graafian follicles were extirpated before the endogenous LH surge on the day prior to ovulation from PMS-injected immature rats. They were incubated in chemically defined medium in presence or absence of gonadotrophins for 4-10 h. After incubation the oocyte-cumulus complexes were recovered from the follicles and one group inspected by Nomarski interference contrast microscopy and one group was placed in saline containing hyaluronidase. In hormone-free medium both the oocyte and the cumulus cells remained morphologically unchanged: a dictyate oocyte surrounded by a compact mass of cumulus cells. Hyaluronidase did not detach cells from the cumulus structure. However, in presence of LH or FSH morphological changes developed in both cell types: the oocyte resumed meiosis as revealed by germinal vesicle breakdown and polar body formation; the cumulus structure became dispersed and embedded in a viscous matrix. The individual cumulus cells displayed pseudopodia-like processes of the cell surface. Treatment with hyaluronidase resulted in detachment of cells from the cumulus. The effects of LH described on the oocyte and cumulus cells were unimpaired in presence of cyanoketone or aminoglutethimide although these agents blocked the follicular relase of progesterone, estradiol and androstenedione as revealed by RIA. The results indicate that a close functional relationship exists between the two cell types of the cumulus oophorus, the oocyte and the cumulus granulosa cells. Both cell types are affected directly or indirectly by gonadotrophins and characteristical morphological changes develop synchronously in both cell types.
 ...
PMID:Effects of gonadotrophins on the cumulus oophorus of isolated rat Graafian follicles. 127 28

A significant percentage of cows (11%) fail to release the placenta within 12 h postpartum. Failure of collagen breakdown seems to be related to the retention of placentas. Sections of placentomes incubated with bacterial collagenase caused an increase in placentome proteolysis (6.6-fold) and placentome collagenolysis (94-fold) within 4 h in a dose-related fashion (r = 0.94). Injections of collagenase (825 U/cc) into the placentomes, via umbilical vessels, decreased the cotyledon-caruncle binding force (determined by manometry) to 30 +/- 5 mm Hg from 97 +/- 2 mm Hg, and increased proteolysis by 42% within 8 h (r = -0.95). Hyaluronidase at various concentrations (400-8 250 U/cc) and at various incubation times (up to 8 h) was not effective. Hyaluronidase (825 U/cc) and collagenase (825 U/cc) were not synergistic in loosening cotyledon-caruncle attachment. A single 15-min collagenase pulse, given prior to perfusion with collagenase-free blood, was as effective in loosening cotyledon attachment as was a sustained 2-h perfusion of blood with collagenase added. It was concluded that collagenase caused collagenolysis and loosening of cotyledon from caruncle, but collagenolysis and cotyledon-caruncle separation were not facilitated by the presence of hyaluronidase.
 ...
PMID:Bovine retained placenta: effects of collagenase and hyaluronidase on detachment of placenta. 131 81

In a prospective, randomised, masked trial, 91 patients undergoing intraocular surgery received an anaesthetic mixture containing lignocaine hydrochloride 2% and bupivacaine hydrochloride 0.5%. In addition group 1 had hyaluronidase (50 i.u./ml) and adrenaline (1:200,000), group 2 had hyaluronidase alone, group 3 had adrenaline alone and group 4 had neither. The groups were compared regarding the quality of operating conditions. Hyaluronidase had a substantial beneficial effect though there was no significant difference related to the use of adrenaline. Anaesthesia was less effective in patients under the age of 65 years.
 ...
PMID:The effects of adrenaline, hyaluronidase and age on peribulbar anaesthesia. 144 62

A high performance liquid chromatography (HPLC) procedure suitable for the simultaneous determination of the molecular size and concentration of macromolecular hyaluronate and proteoglycans in synovial fluid has been developed. Irrigation of the equine tarsocrural joint with 20 ml physiological saline (PSS) caused a mild inflammation with an increase of proteoglycans in the synovial fluid over the baseline arthrocentesis control sample. Proteoglycan and hyaluronate in the synovial fluid did not interact to form hyaluronate-proteoglycan aggregates, but separated as distinct chromatographic peaks. This suggests that the cartilage derived proteoglycans in synovial fluid in the inflamed joint have been proteolytically cleaved from the non-covalent aggregates containing link protein and hyaluronate. Hyaluronidase digestion completely abolished the hyaluronate peak without affecting the proteoglycans. This seems to indicate that proteoglycan in synovial fluid is unable to interact with hyaluronate in synovial fluid to form cartilage type aggregates. Proteolytic degradation and the time dependent release into the synovial fluid of such digested proteoglycan also resulted from the intra-articular injection of methylprednisolone acetate into normal tarsocrural joints and joints irrigated with PSS. These proteoglycans were insensitive to hyaluronidase but may consist of a protein moiety with attached glycosaminoglycans, as suggested by their sensitivity to proteinase and keratanase/chondroitinase digestion. These observations with cartilage treated with methylprednisolone acetate and mildly stimulated articular cartilage are inconsistent with earlier work on osteoarthritic and rheumatoid articular cartilage and have interesting implications for the pathogenesis and for the therapeutic action of intraarticular corticosteroids. A rapid HPLC procedure applicable to unprocessed small volume samples of synovial fluid gives information simultaneously on hyaluronate and proteoglycan in synovial fluid which is not attainable with immunoradiometric or isotope tracer techniques. It therefore appears to be useful for the analysis of cartilage turnover and destruction in health and disease.
 ...
PMID:Methylprednisolone acetate induced release of cartilage proteoglycans: determination by high performance liquid chromatography. 155 Apr 6

[3H]Water and [14C]inulin were injected into perfused rabbit muscle with or without hyaluronidase (300 units/ml) and their absorption into venous effluent from muscle was determined. Hyaluronidase accelerated the absorption of both compounds but the enhancement of [14C]inulin was much larger than that for [3H]water. The pharmacokinetic analysis of venous appearance curves based on a physiological diffusion model elucidated that interstitial diffusion of [14C]inulin was remarkably increased by hyaluronidase treatment, suggesting the existence of steric hindrance for it by the polysaccharide network under normal conditions. Enhancement of [3H]water diffusion was also detected although enhancement ratio was about one-half of that of [14C]inulin. Mean time necessary for each process was calculated using the statistical moment concepts. The results suggested predominant contribution of the interstitial diffusion process and secondary and little contribution of local perfusion flow and permeation process across the capillary wall, respectively, in total absorption of [14C]inulin. Effect of hyaluronidase on transcapillary movement of [14C]inulin was studied using an in vitro diffusion experiment with cultured endothelial cell monolayer and no enhancing effect was shown on [14C]inulin transport across the cell monolayer. The contribution of the local perfusion flow, on the other hand, was shown to be almost equivalent to that of the diffusion process in the total absorption of [3H]water.
 ...
PMID:Contribution of interstitial diffusion in drug absorption from perfused rabbit muscle: effect of hyaluronidase on absorption. 161 86

In experiments on rabbit peripheral lymph, the contribution of the blood and lymphatic system to the whole-body distribution of inulin after subcutaneous administration has been investigated and the effects of hyaluronidase and of thermal stimulus at the administration site examined. Inulin concentrations in lymph exceeded plasma concentrations by more than 100-fold. At the end of the experiment (90 min) the amount of drug in the total lymph collected was about one-seventh the amount found in urine. The blood system, as a result of higher circulation at the administration site distributes inulin from the subcutis more rapidly than does lymph. Hyaluronidase did not influence inulin concentrations in blood and lymph but thermal stimulus significantly decreased both concentration and total distribution. The decrease resulted from a developed oedema and vasoconstriction in the skin and subcutis of the cannulated extremity.
 ...
PMID:Distribution of subcutaneously administered inulin between blood and peripheral lymph in the rabbit. 167 74


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