Koe, Yang Sim;Lee, Soo Yeon;Kim, Won;Cho, Soo Chul;Hwang, Pyoung Han;Kim, Jung Soo;Lee, Dae-Yeol
Clinical and Experimental Pediatrics
/
v.46
no.7
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pp.687-694
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2003
Purpose : Regeneration and repair after ischemic renal injury appears to be modulated by circulating or locally produced growth factors. This study examined the changes of serum insulin like growth factor(IGF-I) and renal expression of IGF-I and II, vascular endothelial growth factor(VEGF), transforming growth $factor-{\beta}$($TGF-{\beta}$), and connective tissue growth factor(CTGF) during the active regeneration period after acute ischemic injury. Methods : Sera and kidney tissue samples(whole kidney, cortex, outer medullae and inner medullae) were obtained before and after one, three, five and seven days of 40 minutes bilateral renal pedicle clamping. Acute renal failure was assessed by measuring the concentration of serum creatinine. Serum IGF-I level was measured by radioimmunoassay. The mRNA expression in kidney was measured by RT-PCR. The distribution of IGF-I and CTGF was detected by immunohistochemistry. Resuts : Serum IGF-I concentration after one day following acute ischemic renal injury was significantly decreased compared to preischemic value. The mRNA levels of IGF-I, IGF-II, $TGF-{\beta}1$ and VEGF in whole kidney were temporally decreased on day one of ischemic injury. IGF-I and IGF-II expressions in outer medullae were significantly decreased on day one after ischemic injury. $TGF-{\beta}1$, CTGF and VEGF expressions were markedly decreased in medullae after one day of ischemic injury compared to other kidney sections. IGF-I was markedly decreased in cortical tubules on day one of uremic rat. CTGF was markedly increased on tubule within three days of ischemic injury. Conclusion : These findings suggest that IGFs, $TGF-{\beta}1$ and CTGF may involve in the pathogenesis or the recovery from acute ischemic renal injury.
Bulla is an air-filled space within the lung parenchyma resulting from deterioration of the alveolar tissue. Molecular mechanism of the formation of the bulla is not well described. Fibroblast growth factor(FGF)-7, bone morphogenetic protein(BMP) receptor, and transforming growth factor(TGF)-$\beta$ receptor are known to have a stimulatory or inhibitory role in the lung formation. We investigated to see if these growth factor or cytokine receptors are involved in the bulla formation by immunohistochemical staining of bullous lung tissues from patients with primary spontaneous pneumothorax. Material and Method: Bullous lung tissues were obtained from 31 patients with primary spontaneous pneumothorax, including 30 males and 1 female from 15 to 39 years old. The bullous tissues were obtained by video-thoracoscopic surgery and/or mini-thoracotomy and fixed in formalin. Blocks of the specimens were embedded with paraffin and cut into 5-6 ${\mu}{\textrm}{m}$ thick slices. The sections were deparaffinized and hydrated and then incubated with primary antibodies against FGF-7, BMP-RII, or TGF-RII. Result: Of the 31 patients, 24 were TGF-RII positive including 18 strong and 6 weak positives. Observation with high magnification showed that strong immunostaining was detected in the boundary region between bullous and normal lung tissues. In contrast, all of the sections were negative with FGF-7 or BMP-RII antibodies. Conclusion: These results suggest that overexpression of TGF- P RII may be involved in the formation of bulla, although further molecular studies are needed to find out more detailed molecular mechanisms.
Effects of transforming growth factor-beta (TGF-${\beta}$) were investigated in human colorectal cancer, and the influence of cantharidinate in inhibiting TGF-${\beta}1$ expression was explored. Relationships among TGF-${\beta}1$ and sex, age, tumor size, tumor location, tumor stage were also analyzed. H&E and immunohistochemistry staining were employed to assess colorectal cancer and TGF-${\beta}1$ expression, respectively. Then, HCT-116 CRC cells were randomly divided into four groups, controls, no serum-treated, chemotherapy and cantharidinate-treated. Immunohistochemistry and real-time PCR were employed to assess the expression of TGF-${\beta}1$ in CRC cells. Our data showed that the expression of TGF-${\beta}1$ might be associated with tumor size and tumor location (P<0.05). The expression of TGF-${\beta}1$ in CRC groups was higher than in adjacent groups (P<0.05). In addition, the expression of TGF-${\beta}1$ in cantharidinate-treated group was much lower than in CRC group (P<0.05). Taken together, these results suggest that TGF-${\beta}1$ plays an important role in CRC development. Cantharidinate might inhibit the expression of TGF-${\beta}1$ and control the development of colorectal cancer.
Objective: To investigate liver fibrosis, TGF-${\beta}1$ levels and curative effects on hepatocellular carcinoma (HCC) with small and conventional dose perfusion chemotherapy by transcatheter arterial chemo embolization (TACE). Methods: Thirty-six hepatocellular carcinoma patients not indicated for surgical resection underwent super-selective transcatheter arterial chemoembolization, divided into small dose (n=15) and conventional dose (n=21) chemotherapy groups. Results: With conventional doses, four indices of liver fibrosis focusing on hyaluronate acide (HA), human procollagen type-III (hPC-III), collagen type-Ⅳ (Ⅳ-C) and transforming growth factor-${\beta}l$ (TGF-${\beta}1$) were obviously increased postoperative compared with preoperative (P<0.01); in contrast, with small doses there were no significant differences except for TGF-${\beta}1$. Five year survival demonstrated no significant differences between the two groups (P>0.05). Conclusion: To hepatocellular carcinoma patients treated by TACE, reducing doses of chemotherapy drugs can reduce progress of liver fibrosis, without impacting on five year survival.
The molecular mechanisms control the function of PDL(periodonta1 ligament) cells and/or fibroblasts remain unclear. PDLsl7, PDL-specific gene, had previousely identified the cDNA for a novel protein from cultured PDL fibroblasts using subtraction hybridization between gingival fibroblasts and PDL fibroblasts. The purpose of this study was to determine the regulation by growth factors and cytokines on PDLsl7 gene expression in cultured human periodontal ligament cells and observe the immunohistochemical localization of PDLsl7 protein in various tissues of mouse. Primary PDL fibroblasts isolated by scraping the root of the extracted human mandibular third molars. The cells were incubated with various concentration of human recombinant $IL-1{\beta}$, PDGF-BB and TGF\;${\beta}$ for 48h nd 2 weeks. At each time point total RNA was extracted and the levels of transcription ere assessed by reverse transcription-polymerase chain reaction (RT-PCR assay). polyclonal antiserum raised against PDLsl7 peptides, CLSVSYNRSYQINE and SEAVHETDLHDGC, were made, and stained the tooth, periodontium, developing bone, bone marrow and mid-palatal suture of the mouse. The results were as follows. 1. PDLsl7 mRNA levels were increased in response to PDGF (10ng/ml) and $TGF\;{\beta}$(20ng/ml) after treatment of the $IL-1{\beta}$, PDGF-BB and $TGF{\beta}$for 48 h. 2. PDLsl7 was up-regulated only by $TGF{\beta}$(20 ng/ml) after treatment of the $IL-1{\beta}$, PDGF-BB and $TGF\;{\beta}$ for 2 weeks and unchanged by the other stimulants. 3. PDLsl7 was a novel protein coding the 142 amino acid peptides in the ORF and the nucleotide sequences of the obtained cDNA from RT-PCR was exactly same as the nucleotides of the database. 4. Immunohistochemical analysis showed that PDLsl7 is preferentially expressed in the PDL, differentiating osteoblast-like cells and stromal cells of the bone marrow in the adult mouse. 5. The expression of PDLsl7 protein was barely detectable in gingival fibroblasts, hematopoetic cells of the bone marrow and mature osteocytes of the alveolar bone. These results suggest that PDLsl7 might upregulated by PDGF-BB or $TGF{\beta}$ and acts at the initial stage of differentiation when the undifferentiated mesenchymal cells in the bone marrow and PDL differentiate into multiple cell types. However, more research needs to be performed to gain a better understanding of the exact function of PDLsl7 during the differentiation of bone marrow mesenchymal and PDL cells.
$TGF-{\beta}$ is one of growth factors that may be involved in the formation of bone and cartilage. Multiple studies demonstrate that $TGF-{\beta}$ is involved in regulating cell proliferation, differentiation and matrix synthesis, events observed in frature healing. The apperance of $TGF-{\beta}$ in the fracture during healing was evaluated by immunohistologic localization of $TGF-{\beta}$ using antibody. Twenty Sprauge-Dawley strain white male rats, each weiging about 150grams were used and divided two groups. The one group, the $2{\times}2mm$ bony defect was formed in the right femur. The other group, $4{\times}2mm$ bony defect was formed in right femur. Both group were sacrificed at 3day, 1, 2, 3, 4 week and femur were harvested, paraffin sections were stained with H & E, MT stain, immunihistochemical staining with $TGF-{\beta}$ antibody and observed under light microscope. The result were as follows: 1. New bone formation and cartilagenous tissue was seen at 3day. And in the $2{\times}2mm$ bony defect group, $TGF-{\beta}$ stained the cell surounding new bone. 2. The osteoclast and trabecular was seen at 1week. $TGF-{\beta}$ stained the osteoblast and in the $2{\times}2mm$ bony defect group was stained more than $4{\times}2mm$ bony defect group. 3. The lamella bone and trabecule was seen from 3, 4week, and $TGF-{\beta}$ stained almost negative. From the above finding, we could concluded that $TGF-{\beta}$ stained the osteoblast at early stage and 1week, the peak stain was seen from 1week, and then decreased, almost negative stain was seen at 3, 4week.
Kim, Ki Uk;Lee, Su Jin;Lee, Jae Hyung;Cho, Woo Hyun;Jung, Kyung Sik;Joe, Jin Hoon;Kim, Yun Seong;Lee, Min Ki;Kim, Yeong Dae;Choi, Young Min;Park, Soon Kew
Tuberculosis and Respiratory Diseases
/
v.58
no.1
/
pp.18-24
/
2005
Background : Endobronchial tuberculosis often complicates bronchostenosis, which can cause dyspnea due to an airway obstruction, and can be misdiagnosed as bronchial asthma or lung cancer. This study investigated the possible correlation between the $interferon-{\gamma}$($IFN-{\gamma}$) and transforming growth $factor-{\beta}$($TGF-{\beta}$) levels in the serum and bronchial washing fluid and the treatment results in endobronchial tuberculosis patients. Methods : Sixteen patients, who were diagnosed as endobronchial tuberculosis using bronchoscopy, and 10 healthy control subjects were enrolled in this study. The $IFN-{\gamma}$ and $TGF-{\beta}$ levels were measured in the serum and bronchial washing fluid of 16 endobronchial tuberculosis patients before and after treatment using the ELISA method. The endobronchial tuberculosis patients were divided into those who showed bronchial fibrostenosis after treatment and those who did not. Results : The $IFN-{\gamma}$ and $TGF-{\beta}$ levels in the bronchial washing fluid in endobronchial tuberculosis patients were elevated comparing to the control (p<0.05). After treatment, 7 of the 16 endobronchial tuberculosis patients showed bronchial fibrostenosis and the other 9 cases healed without this sequela. In the patients with fibrostenosis after treatment, the initial serum $TGF-{\beta}$ level was lower than the patients without fibrostenosis after treatment (p<0.05). Moreover, the serum $TGF-{\beta}$ level after treatment further decreased comparing to the patients without fibrostenosis after treatment(p<0.05). Conclusion : Elevated $IFN-{\gamma}$ and $TGF-{\beta}$ levels in the bronchial washing fluid in endobronchial tuberculosis patients are believed to be related to the pathogenesis of endobronchial tuberculosis. The decreased initial serum $TGF-{\beta}$ level and the change in the serum $TGF-{\beta}$ level after treatment are believed to be involved in bronchial fibrostenosis during the course of the disease.
Proceedings of the Korean Society of Veterinary Pathology Conference
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2003.10a
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pp.16-16
/
2003
Hepatic fibrosis is a common response to various chronic hepatic injuries and occurs as a consequence of the transformation of hepatic stellate cells into myofibroblasts (MFBs) producing abnormal extracellular matrix which is mainly induced by transforming growth factor-beta (TGF-${\beta}$), especially TGF-${\beta}$1 [1,2]. As the liver becomes fibrotic, there are both quantitative and qualitative changes in several pathological markers related to the hepatic fibrosis. These fibrotic markers in liver are mainly consisted of several proteins and cytokines, but sometimes included specific type cells. The aim of this study was to detect expression and change of markers (TGF-${\beta}$, mallory body, cytokeratin, ${\alpha}$-SMA, hypoxia, collagen) during hepatic fibrogenesis. (omitted)
Kim, W.K.;Kim, M.H.;Ryu, Y.H.;Ryu, Y.C.;Rhee, M.S.;Seo, D.S.;Lee, C.Y.;Kim, B.C.;Ko, Y.
Asian-Australasian Journal of Animal Sciences
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v.18
no.5
/
pp.716-722
/
2005
Carcass weight and backfat thickness are primary yield grading factors. Insulin-like growth factor (IGF)-I/-II, transforming growth factor $\beta$1 (TGF-$\beta$1), and epidermal growth factor (EGF) regulate the proliferation and differentiation of cells including adipocytes. Also, interleukin (IL)-2/-6, cortisol, and dehydroepiandrosterone-sulfate (DHEA-S) are known to be related to muscle growth and fat depth. However, the relationships between endocrine factors and carcass grade have not been studied. Therefore, this study aimed to measure the concentrations of endocrine factors in serum and muscle, and to investigate the relationship of endocrine factors with carcass grade. A total of 60 crossbred gilts (Duroc${\times}$Yorkshire${\times}$Landrace) were used. Blood from the jugular vein was collected at antemortem (7 days before slaughter) and postmortem periods, and M. Longissimus was collected at 45 min and 24 h after slaughter. The concentrations of IGF-I/-II, EGF, TGF-$\beta$1, IL-2/-6, cortisol and DHEA-S were analyzed by radioimmunoassay (RIA) or enzyme-linked immunosorbent assay (ELISA). In general, IGF and EGF concentrations in serum and muscle of grade A carcasses were found to be higher than those of grade C carcasses at antemortem and postmortem periods, whereas the pattern of TGF-$\beta$1 concentration was reversed. In particular, the concentrations of muscle IGF-I (24 h postmortem) and serum TGF-$\beta$1 (antemortem) were significantly different between grades A and C (p<0.05). The present results indicate that serum and muscle growth factors affect carcass weight and backfat thickness, and indirectly suggest the possibility that carcass grade could be predicted by expression of serum and/or muscle growth factors.
Objective: The aim of this study is to elucidate the effects of transforming growth factor-${\beta}$ (TGF-${\beta}$)1 and L-ascorbic acid on proteoglycan synthesis, and the relationship between Sox9, proteoglycan, and TGF-${\beta}1$ in intervertebral disc cells. Methods: Human intervertebral disc tissue was sequentially digested to 0.2% pronase and 0.025% collagenase in DMEM/F-12 media and extracted cells were cultured in $37^{\circ}C$, 5% $CO_2$ incubator. When intervertebral disc cells were cultured with TGF-${\beta}1$ or L-ascorbic acid, the production level of sulfated glycosaminoglycan (sGAG) was estimated by dimethyl methyleneblue (DMMB) assay. The changes of Sox9 mRNA and protein levels via TGF-${\beta}1$ were detected by RT-PCR and Western blot analysis in each. Results: The amount of sGAG was increased with the lapse of time during incubation, and sGAG content of pellet cultured cells was much larger than monolayer culture. When primary cultured intervertebral disc cells in monolayer and pellet cultures were treated by TGF-${\beta}1$ 20 ng, sGAG content of experimental group was increased significantly compared to control group in both cultures. L-Ascorbic acid of serial concentrations (50-300 ug/ml) increased sGAG content of mono layer cultured intervertebral disc cells significantly in statistics. The co-treatment of TGF-${\beta}1$ and L-ascorbic acid increased more sGAG production than respective treatment. After treating with TGF-${\beta}1$, Sox9 mRNA and protein expression rates were significantly increased in disc cells compared with the control group. Conclusion: This study suggests that TGF-${\beta}1$ would increase sulfated glycosaminoglycan (sGAG) and other proteoglycans such as versican by elevating Sox9 mRNA and protein expressions in order.
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