Cathepsin-G Dotaz Zobrazit nápovědu
OBJECTIVE: The aim of this study was to evaluate the amniotic fluid cathepsin-G concentrations in women with preterm prelabor rupture of membranes (PPROM) based on the presence of the microbial invasion of the amniotic cavity (MIAC) and/or intra-amniotic inflammation (IAI). METHODS: A total of 154 women with singleton pregnancies complicated by PPROM were included in this study. Amniotic fluid samples were obtained by transabdominal amniocentesis. Amniotic fluid cathepsin-G concentrations were assessed by ELISA. MIAC was determined using a non-cultivation approach. IAI was defined as an amniotic fluid bedside interleukin-6 concentration ≥ 745 pg/mL. RESULTS: Women with MIAC had higher amniotic fluid cathepsin-G concentrations than women without MIAC (with MIAC: median 82.7 ng/mL, versus without MIAC: median 64.7 ng/mL; p = 0.0003). Women with IAI had higher amniotic fluid cathepsin-G concentrations than women without this complication (with IAI: median 103.0 ng/mL, versus without IAI: median 66.2 ng/mL; p < 0.0001). Women with microbial-associated (with both MIAC and IAI) IAI and sterile (IAI without MIAC) IAI had higher amniotic fluid cathepsin-G concentrations than women with colonization (MIAC without IAI) and women without both MIAC and IAI (p < 0.0001). CONCLUSIONS: The presence of either microbial-associated or sterile IAI was associated with increased amniotic fluid cathepsin-G concentrations in pregnancies complicated by PPROM. Amniotic fluid cathepsin-G appears to be a potential marker of IAI.
- MeSH
- amniocentéza MeSH
- biologické markery analýza MeSH
- dospělí MeSH
- ELISA MeSH
- interleukin-6 metabolismus MeSH
- kathepsin G analýza MeSH
- lidé MeSH
- mladý dospělý MeSH
- plodová voda chemie metabolismus mikrobiologie MeSH
- předčasná porodní činnost MeSH
- předčasný odtok plodové vody metabolismus mikrobiologie MeSH
- retrospektivní studie MeSH
- studie případů a kontrol MeSH
- těhotenství MeSH
- Check Tag
- dospělí MeSH
- lidé MeSH
- mladý dospělý MeSH
- těhotenství MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
OBJECTIVE: The study aimed to determine the cervical calreticulin and cathepsin-G concentrations in pregnancies complicated by preterm prelabor rupture of membranes (PPROM) with respect to the presence of microbial invasion of the amniotic cavity (MIAC) and intra-amniotic inflammation (IAI). METHODS: Eighty women with singleton pregnancies complicated by PPROM were included in this study. Cervical and amniotic fluids were obtained at the time of admission, and concentrations of calreticulin and cathepsin-G in cervical fluid were determined using ELISA. The MIAC was defined as a positive PCR analysis for Ureaplasma species, Mycoplasma hominis, and/or Chlamydia trachomatis and/or by positivity for the 16S rRNA gene. IAI was defined as amniotic fluid bedside IL-6 concentrations ≥745 pg/mL Result: Neither women with MIAC nor with IAI had different cervical fluid concentrations of calreticulin (with MIAC: median 18.9 pg/mL vs. without MIAC: median 14.7 pg/mL, p = 0.28; with IAI: median 14.3 pg/mL vs. without IAI: median 15.6 pg/mL, p = 0.57;) or of cathepsin-G (with MIAC: median 30.7 pg/mL vs. without MIAC: median 24.7 pg/mL, p = 0.28; with IAI: median 27.3 pg/mL vs. without IAI: median 25.1 pg/mL, p = 0.80) than women without those complications. No associations between amniotic fluid IL-6 concentrations, gestational age at sampling, and cervical fluid calreticulin and cathepsin-G concentrations were found. CONCLUSIONS: Cervical fluid calreticulin and cathepsin-G concentrations did not reflect the presence of MIAC or IAI in women with PPROM.
- MeSH
- biologické markery analýza MeSH
- chorioamnionitida diagnóza mikrobiologie MeSH
- dospělí MeSH
- ELISA MeSH
- gestační stáří MeSH
- interleukin-6 analýza MeSH
- kalretikulin analýza MeSH
- kathepsin G analýza MeSH
- lidé MeSH
- mladý dospělý MeSH
- plodová voda chemie metabolismus mikrobiologie MeSH
- předčasný odtok plodové vody metabolismus mikrobiologie MeSH
- prospektivní studie MeSH
- senzitivita a specificita MeSH
- těhotenství MeSH
- Check Tag
- dospělí MeSH
- lidé MeSH
- mladý dospělý MeSH
- těhotenství MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
Platelet aggregation and acute inflammation are key processes in vertebrate defense to a skin injury. Recent studies uncovered the mediation of 2 serine proteases, cathepsin G and chymase, in both mechanisms. Working with a mouse model of acute inflammation, we revealed that an exogenous salivary protein of Ixodes ricinus, the vector of Lyme disease pathogens in Europe, extensively inhibits edema formation and influx of neutrophils in the inflamed tissue. We named this tick salivary gland secreted effector as I ricinus serpin-2 (IRS-2), and we show that it primarily inhibits cathepsin G and chymase, while in higher molar excess, it affects thrombin activity as well. The inhibitory specificity was explained using the crystal structure, determined at a resolution of 1.8 Å. Moreover, we disclosed the ability of IRS-2 to inhibit cathepsin G-induced and thrombin-induced platelet aggregation. For the first time, an ectoparasite protein is shown to exhibit such pharmacological effects and target specificity. The stringent specificity and biological activities of IRS-2 combined with the knowledge of its structure can be the basis for the development of future pharmaceutical applications.
- MeSH
- agregace trombocytů genetika imunologie MeSH
- chymasy imunologie metabolismus MeSH
- exprese genu MeSH
- hmyzí proteiny genetika imunologie metabolismus MeSH
- kathepsin G imunologie metabolismus MeSH
- klíště genetika imunologie metabolismus MeSH
- krystalizace MeSH
- kvarterní struktura proteinů MeSH
- lidé MeSH
- modely nemocí na zvířatech MeSH
- molekulární sekvence - údaje MeSH
- myši inbrední C57BL MeSH
- myši MeSH
- sekvence aminokyselin MeSH
- sekvenční analýza proteinů MeSH
- serpiny genetika imunologie metabolismus MeSH
- slinné proteiny a peptidy genetika imunologie metabolismus MeSH
- zánět imunologie metabolismus MeSH
- zvířata MeSH
- Check Tag
- lidé MeSH
- myši MeSH
- ženské pohlaví MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- MeSH
- leukocyty enzymologie MeSH
INTRODUCTION: The aging process is intricately linked to alterations in cellular and tissue structures, with the respiratory system being particularly susceptible to age-related changes. Therefore, this study aimed to profile the activity of proteases using activity-based probes in lung tissues of old and young rats, focusing on the expression levels of different, in particular cathepsins G and X and matrix Metalloproteinases (MMPs). Additionally, the impact on extracellular matrix (ECM) components, particularly fibronectin, in relation to age-related histological and ultrastructural changes in lung tissues was investigated. MATERIALS AND METHODS: Lung tissues from old and young rats were subjected to activity-based probe profiling to assess the activity of different proteases. Expression levels of cathepsins G and X were quantified, and zymography was performed to evaluate matrix metalloproteinases activity. Furthermore, ECM components, specifically fibronectin, were examined for signs of degradation in the old lung tissues compared to the young ones. Moreover, histological, immunohistochemical and ultrastructural assessments of old and young lung tissue were also conducted. RESULTS: Our results showed that the expression levels of cathepsins G and X were notably higher in old rat lung tissues in contrast to those in young rat lung tissues. Zymography analysis revealed elevated MMP activity in the old lung tissues compared to the young ones. Particularly, significant degradation of fibronectin, an essential ECM component, was observed in the old lung tissues. Numerous histological and ultrastructural alterations were observed in old lung tissues compared to young lung tissues. DISCUSSION AND CONCLUSION: The findings indicate an age-related upregulation of cathepsins G and X along with heightened MMP activity in old rat lung tissues, potentially contributing to the degradation of fibronectin within the ECM. These alterations highlight potential mechanisms underlying age-associated changes in lung tissue integrity and provide insights into protease-mediated ECM remodeling in the context of aging lungs.
- MeSH
- extracelulární matrix metabolismus ultrastruktura MeSH
- fibronektiny * metabolismus MeSH
- kathepsin G metabolismus MeSH
- krysa rodu rattus MeSH
- lyzozomy ultrastruktura metabolismus MeSH
- matrixové metaloproteinasy metabolismus MeSH
- plíce * ultrastruktura metabolismus MeSH
- proteasy metabolismus MeSH
- stárnutí * metabolismus MeSH
- zvířata MeSH
- Check Tag
- krysa rodu rattus MeSH
- mužské pohlaví MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
Východisko: Expresní microarrays představují vhodnou technologi i pro studium patologických procesů na genomické úrovni. Pro identifikace odlišně exprimovaných genů u pacientů s CML jsme použili plastikové microarrays, které kombinují hlavní přednosti nylonových membrán a skleněných microarrays. Pacienti a Metody. Leukocyty byly izolovány z periferní krve 6 pacientů s chronickou myeloidní leukemií v době stanovení diagnózy. U všech pacientů byl detekován BCR/ABL fúzní gen. Pro detekci expresních profilů byly použity Atlas Human Plastic 8K Microarrays (Clontech) s 8 327 genovými sondami. mRNA byla izolována z 45µg celkové RNA pomocí magnetických částic. Výsledky. Většina genů u pacientů vykazovala stejnou expresi jako kontrolní vzorek. U některých genů bylo možné detekovat podobné změny v expresi u všech (či většiny) pacientů např. zvýšená exprese: lactotransferrin, proteoglycan 2, elastase 2, MMP 9, defensin alpha 1,3,4, peptidoglycan recognition protein, cathepsin G, myeloperoxidase, proteinase 3; snížená exprese: CD68 antigen, cathepsin B, H factor, integrin-alpha X, interleukin 8, preB cell colony enhancing factor. Závěr. Naše studie odhalila variabilitu v expresi mnoha genů, ale i přesto jsme identifikovali skupinu genů s podobnými změnami v aktivitě. Tyto geny by mohly být asociovány s rozvojem onemocnění a budou podrobněji studovány.
Background: Expression microarrays provide a powerful technology for studying disease processes on a genomic scale. We used plastic microarrays for identification of differentially expressed genes in chronic myeloid leukemia patients. Plastic arrays combine the best properties of glass and nylon arrays.Patients and Methods: Leukocytes were isolated from peripheral blood of 6 CML patients at diagnosis. All patients were BCR/ABL fusion gene positive. For gene expression profiling we used Atlas Human Plastic 8K Microarrays (Clontech) with 8 327 gene probes. mRNA was isolated from 45µg of total RNA using magnetic bead method. Results: Majority of the patient genes showed the same transcription activity as in the control sample. In a few genes it was possible to observe similar significant changes of gene expression in all (most) patients e.g.up-regulation: lactotransferrin, proteoglycan 2, elastase 2, MMP9, defensin alpha 1,3,4, peptidoglycan recognition protein, cathepsin G, myeloperoxidase, proteinase 3; down-regulation: CD68 antigen, cathepsin B, H factor, integrin-alpha X, interleukin 8, preB cell colony enhancing factor. Conclusions: Although the study revealed variability of gene expression in many genes, we identified a number of genes with the similar expression regulation. The genes may be associated with the disease process and will be analysed in detail.
- MeSH
- chronická myeloidní leukemie diagnóza etiologie genetika MeSH
- čipová analýza proteinů metody přístrojové vybavení využití MeSH
- exprese genu genetika účinky léků MeSH
- financování organizované MeSH
- genetický výzkum MeSH
- hematologické nádory diagnóza etiologie genetika MeSH
- interleukiny genetika imunologie izolace a purifikace MeSH
- kathepsiny genetika imunologie izolace a purifikace MeSH
- lékařská onkologie metody trendy MeSH
- lidé MeSH
- RNA diagnostické užití genetika izolace a purifikace MeSH
- sekvenční analýza hybridizací s uspořádaným souborem oligonukleotidů metody využití MeSH
- Check Tag
- lidé MeSH
