The purpose of this study was to investigate the distribution of CGRP immunoreactive nerve fibers in rat squamosomandibular joint with postnatal development. Squamosomandibular joint with adjacent tissue of 8 groups of rats(1, 5, 10, 15, 20, 25, 35-postnatal day and adult groups) were removed on bloc and processed for immunohistochemistry and were subjected to light microscopic examination. The results obtained were as follows; 1. The anterior portion of the articular disk was most densely innervated, followed by the posterior, lateral, and medial portions in each group. 2. Increase of CGRP immunoreactive nerve fibers was evident in 10, 15, 20 postnatal day groups. 3. Almost no CGRP immunoreactive nerve fibers were observed in articular surface of disk proper, mandibular fossa and condyle head of each group. These result suggest that CGRP immunoreactive nerve fibers increased in synovial membrane and peripheral portion of articular disk during 10-20 postnatal day may play a important role in squamosomandibular joint function after weaning period.
Plasma disappearance of amaranth (AM), a model compound of organic anionic drugs, was retarded by intravenous infusion of taurodeoxycholate (TDC), a representative bile acid, in the rat. Biliary excretion accounted for 30-60% of the systemic excretion of AM. AM seemed to be metabolised in the hepatocyte to form a compound that is excreted more rapidly into the bile than AM itself, considering apparent biliary clearance, $CL_{bil}$, is much larger than systemic clearance, $CL_s$. Decrease in $CL_{bil}$ by TDC infusion might be due to elevated plasma level rather than decreased biliary excretion of AM. Decreased distribution or urinary excretion of AM by TDC was supposed to be one of the probable reasons of elevated plasma level. Competitive inhibition between AM and TDC on tissue distribution and urinary excretion might explain the mechanism. The effect of TDC on the $CL_{bil}$ of methylene blue, a cationic dye, was quite different from that of AM, as reported previously by us. More intensive study would be necessary to elucidate the difference of biliary excretion between organic anions and cations.
Objectives The purpose of this study was to evaluate the effects of Curcumae Longae Rhizoma pharmacopuncture on the monosodium iodoacetate (MIA)-induced osteoarthritis rats. Methods Osteoarthritis was induced by injection of MIA ($50{\mu}L$ with 80 mg/mL) into knee joint cavity of rats. Rats were divided into 6 groups. Normal group was injected by normal saline into knee joint cavity only. Control group was induced for osteoarthritis by MIA and orally administered with distilled water. Normal Saline group was induced for osteoarthritis by MIA and injected with normal saline $100{\mu}L$. Positive comparison group was injected with MIA and orally administered with indomethacin 5 mg/kg. Curcumae Longae Rhizoma pharmacopuncture low concentration (CL) group was induced for osteoarthritis by MIA and injected with Curcumae Longae Rhizoma pharmacopuncture low concentration $100{\mu}L$. Curcumae Longae Rhizoma pharmacopuncture high concentration (CH) group was induced for osteoarthritis by MIA and injected with Curcumae Longae Rhizoma pharmacopuncture high concentration $100{\mu}L$. Curcumae Longae Rhizoma pharmacopuncture was injected at ST35 and EX-LE4 each group (CL, CH). After that, hind paw weight distribution was measured and oxidative stress biomarker in serum, liver function biomarker in serum, western blot analysis were measured. Histological analysis of knee joint tissue was performed by hematoxylin and eosin staining, Safranin-O staining and Masson's trichrome staining. Results Hind paw weight distribution was significantly improved in both group. alanine aminotransferanse and aspartate aminotransferase were decreased significantly in CH group compare with Indomethacin threated group. Antioxidant enzyme glutathione peroxidase, Catalase and heme oxygenase-1 were increased in CH group compare with control group. Inflammatory cytokine cyclooxygenase-2, inducible nitric oxide synthase and interleukin-1 beta were decreased significantly in CH group. Histological analysis result shows that protective effects of joint and cartilage were observed in both CH and CL groups in a concentration-dependent. Conclusions The result suggest that Curcumae Longae Rhizoma pharmacopuncture has anti-oxidation effect, anti-inflammatory effect and also can prevent progression of osteoarthritis and protect joint cartilage.
The distribution, metabolism and excretion of CKD-602{20(S)-7-[2-(N-Isopropylamino)ethyl]camptothecin HCI), a new camptothecin derivative, were investigated in rats after a sing le administration of CKD-602. 1. The tissue levels of CKD-602 given to mice by the intravenous route at a dose of 20mg/kg were the highest in intestine, followed in descending order by kidney, liver, stomach,lung, heart, spleen and plasma. The concentrations of CKD-602 after 24hrs decreased to less than 2% of the peak level in most tissues except the skin. The urinary and fecal excretion of CKD-602 were 47.6% and 44.4% of the administered dose, respectively, with 0.7% remaining in the rinse. 2. After administration of CKD-602 at 10mg/kg in rats, metabolism of this compound was examined in plasma, urine, and feces. The plasma samples were collected for 24hr, urinary and fecal samples for 72hr. While any peak of CKD-602 in HPLC chromatograms was not detected from plasma and urine it was detected in feces (peaks, 9.8 min). However, additional peak area was about 0.5% of the peak area of parent CKD-602. Therefore, CKD-602 may be eliminated with the parent form and rarely metabolized in the body. 4. After I.v. administration of CKD-602 at 10mg/kg in rats, urinary and fecal excretions were examined for 72hrs post dose period. 87% of total urinary excretion of CKD-602 was excreted within 8hr after administration, 53%, and 32% of total fecal excreted amounts were determined in 0-24 hr and 24-48hr periods, respectively. The total excretion amounts of CKD-602 into urine and feces were 94% of the administered dose.
Objectives The purpose of this study was to know the effects of Danggwisayeok-tang (Dangguisinitang) extract (DGSYT) on monosodium iodoacetate (MIA)-induced rat osteoarthritis. Methods For this purpose, rats were divided into 5 groups. Normal group was not injected with MIA and orally administered any medication. Control group was injected with MIA and not orally administered any medication. DGSYT100 group was injected with MIA and orally administered 100 mg/kg of DGSYT. DGSYT300 group was injected with MIA and orally administered 300 mg/kg of DGSYT. JoinsT group was injected with MIA and orally administered 20 mg/kg of Joins tablet. DGSYT100 and DGSYT300 groups were orally administered DGSYT during a week before and 3 weeks after based on the day MIA injected. The changes of hepatotoxicity, nephrotoxicity, relative hind paw weight distribution, cytokine in serum, cytokine messenger ribonucleic acid (mRNA) in joint tissue and histopathological observation (Hematoxylin & Eosin and Safranin-O staining) were measured. Results Alanine aminotransferase (ALT) levels of DGSYT100, DGSYT300 and JoinsT groups were increased significantly, but these results were within normal range. Aspartate aminotransferase (AST) and creatinine levels of all groups were not changed significantly. In the change of relative hind paw weight distribution, DGSYT300 and JoinsT groups were decreased significantly 14 and 21 days after MIA injected. Interleukin-$1{\beta}$ (IL-$1{\beta}$) and Interleukin-6 (IL-6), Leukotriene $B_4$ and Osteocalcin levels of DGSYT300 and JoinsT groups were decreased significantly. In measurement of IL-$1{\beta}$ and nitric oxide synthase-II mRNA relative quantitative of control, DGSYT100, DGSYT300 and JoinsT groups were decreased significantly. In measurement of TNF-${\alpha}$, IL-6 and Cyclooxygenase-2 mRNA relative quantitative of control, DGSYT300 and JoinsT groups was decreased significantly. In histopathological observation of knee, synovial tissue, cartilage and proteoglycan of DGSYT100, DGSYT300 and JoinsT were well preserved compared with control group. Conclusions According to the results, DGSYT has anti-inflammation and pain relief effects. So it should be suppressed progression of arthritis in MIA-induced osteoarthritis rat.
Background : Peripheral nerves more rapidly recover than central nerves. However, it has been known that the degree of reaction of axons of peripheral nerves is affected by distinctive characteristics of axons and environmental factors near the axons. Taxol is a widely used medicine as for ovarian, breast, lung and gastric cancer. However it causes patients difficulties under treatment due to its toxic and side effects, which include persistent pain. Objectives : This study reviewed how SJT extract in vitro and in vivo affects nerve tissues of a sciatic nerve damaged by Taxol. It also studied how SJT extract in vivo affects axons of the sciatic nerve after the sciatic nerve was damaged by pressing. Methods : After vehicle, Taxol, and Taxol plus SJT were treated respectively for tissue of the sciatic nerve in vitro and then tissues were observed using Neurofilament 200, Hoechst, ${\beta}$-tubulin, $S100{\beta}$, caspase-3 and anti-cdc2. SJT was also oral medicated by injecting Taxol into the sciatic nerve of in vivo rats. Tissues of the sciatic nerve and axons of DRG sensory nerves were then observed using Neurofilament 200, Hoechst, ${\beta}$-tubulin, $S100{\beta}$, caspase-3 and p-Erk1/2. After inflicting pressing damage to the sciatic nerve of in vivo rats, tissues of the sciatic nerve and DRG sensory nerve were observed using Neurofilament 200, Hoechst, $S100{\beta}$, caspase-3, anti-cdc2, phospho-vimentin, ${\beta}1$-integrin, Dil reverse tracking and p-Erk1/2. Results : The group of in vitro Taxol plus SJT treatment had meaningful effects after sciatic nerve tissue was damaged by Taxol. The group of in vivo SJT treatment had effects of regenerating Schwann cells and axons which were damaged by Taxol treatment. The group of in vivo SJT had effects of regenerating axons in damaged areas after the sciatic nerve was damaged by pressing, and also had variations of distribution in Schwann cells at DRG sensory nerves and axons. Conclusions : This study confirmed that SJT treatment is effective for growth of axons in the sciatic nerve tissues and improvement of Schwann cells after axons of the sciatic nerve tissues was damaged. After tissues of sciatic nerve was damaged by pressing in vivo, SJT treatment had effects on promoting regeneration of axon in the damaged area and reactional capabilities in axons of DRG sensory nerves.
The present study aimed to explore the neuroprotective effect and possible mechanisms of rhGLP-1 (7-36) against transient ischemia/reperfusion injuries induced by middle cerebral artery occlusion (MCAO) in type 2 diabetic rats. First, diabetic rats were established by a combination of a high-fat diet and low-dose streptozotocin (STZ) (30 mg/kg, intraperitoneally). Second, they were subjected to MCAO for 2 h, then treated with rhGLP-1 (7-36) (10, 20, $40{\mu}g/kg$ i.p.) at the same time of reperfusion. In the following 3 days, they were injected with rhGLP-1 (7-36) at the same dose and route for three times each day. After 72 h, hypoglycemic effects were assessed by blood glucose changes, and neuroprotective effects were evaluated by neurological deficits, infarct volume and histomorphology. Mechanisms were investigated by detecting the distribution and expression of the nuclear factor erythroid-derived factor 2 related factor 2 (Nrf2) in ischemic brain tissue, the levels of phospho-PI3 kinase (PI3K)/PI3K ratio and heme-oxygenase-1 (HO-l), as well as the activities of superoxide dismutase (SOD) and the contents of malondialdehyde (MDA). Our results showed that rhGLP-1 (7-36) significantly reduced blood glucose and infarction volume, alleviated neurological deficits, enhanced the density of surviving neurons and vascular proliferation. The nuclear positive cells ratio and expression of Nrf2, the levels of P-PI3K/PI3K ratio and HO-l increased, the activities of SOD increased and the contents of MDA decreased. The current results indicated the protective effect of rhGLP-1 (7-36) in diabetic rats following MCAO/R that may be concerned with reducing blood glucose, up-regulating expression of Nrf2/HO-1 and increasing the activities of SOD.
Objectives : Banhasasim-tang has been clinically used to treat upper gastric intestinal discomfort. The object of this study is to examine the defense effect of Banhasasim-tang for acute duodenal injury of the mouse. Methods and Materials : Twenty-one rats were divided into 3 groups and treated as follows: the control group was untreated mice. The ADE group was acute duodenal-damage-elicited mice. The BST group was Banhasasim-tang treated mice before acute duodenal damage elicitation. The groups were examined with common morphology, paneth cells in intestinal crypt, absorptive cells and goblet cells in epithelium, cell division in mucose, COX-l as mucosal protector, COX-2 (which appears to play an important role in inflammation), IL-2R-inducing cellular immuno-chainreaction, and the distribution of apoptotic cells. Results : 1. Common morphology: the ADE group was observed with duodenal injury - loss of villi, infiltration of cells concerned to inflammation (lymphocytes, granular leukocytes) to submucosal layer - by hemorrhagic erosions, while the BST group was seen the same as normal in proportion to increasing treatment time before injury. 2. Histochemical change: the ADE group was observed with noticeable decreased distribution of absorptive cells with microvilli, acid mucin secreted goblet cell, neutral mucin secreted goblet cell, paneth cells compared to the normal group. The BST group was seen to have distribution of epithelium cells resembling normal in proportion to increasing treatment time before injury. 3. Imnunohistochemical change: the ADE group showed a change of factors leading to duodenal injury as reduce of cytokinesis, COX-1, increase of COX-2, IL-2R-. In contrast, the BST group tended to reduction of cytokinesis, COX-1, increase of COX-2, IL-2R- in proportion to increasing taking time before injury. 4. Apoptosis change: the ADE group showed increasing apoptosis cells, in contrast to the BST group which was the same as normal in proportion to increasing treatment time before injury. Conclusions : According to the above results, by increasing the defense system of mucosal epithelium, Banhasasim-tang is thought to effectively protect tissue against ulcers resulting from acute duodenal injury.
천연우라늄의 생체내 흡수 및 분포의 역학적 정보와 반응을 알기 위하여 질산우라늄을 투여하여 변동되는 조직분포 및 혈중 BUN, Creatinine, SGPT 및 SGOT의 활성도를 측정하였다. 조직중의 우라늄 함량은 방사화분석법을 이용하여 방출되는 ${\gamma}$ 에너지의 강도를 측정함으로써 조사 하였다. 이때 시간이 경과함에 따른 질산우라늄의 조직분포의 양상은 특히 폐가 다른 장기에 비하여 현저하게 축적되는 것을 관찰하였다. 한편 25 mg/kg의 질산우라늄 투여시 비효소계인 질소대사의 임상적 지표인 BUN 및 Creatinine값은 예민한 반응을 나타냈으나 효소계의 SGPT 및 SGOT의 활성도에는 큰 변화가 없었다. 1 mg/kg의 질산우라늄 투여에 의한 SGPT 및 SGOT의 활성도의 변화는 복강투여후 90분에 최고치를 나타내다가 회복되었다. 우라늄 흡수의 조직분포의 실험결과 간장 및 신장의 축적이 흡수초기에 최고치를 나타내다 다시 감소되는 결과로 미루어 보아 우라늄의 독성을 가장 크게 나타나는 결정장기(critical organ)는 신장이나 간장이 아니고 폐장임을 알 수 있었다.
Objective: The aim of this study was to identify the efficacy and underlying mechanism of cloves as an osteoarthritis (OA) treatment in a monosodium iodoacetate (MIA)-induced rat OA model. Osteoarthritis (OA) is nowadays one of the most prevalent degenerative joint diseases. Methods: Sprague-Dawley rats treated with MIA (50 μL; 80 mg/mL) were used as in vivo OA models. Cloves (100 and 200 mg/kg b.w.) were administered orally once daily for 2 weeks from 7 days after MIA injection. Changes in hindpaw weight distribution (HWD) were measured as a joint discomfort index. Activation markers related to inflammatory responses and cartilage degeneration in the right knee joints were evaluated by serum analysis and western blotting. Results: HWD decreased in the MIA control group but showed a dose-dependent elevation after clove treatment. Clove treatment inhibited inflammatory factors by PI3K/Akt/NF-κB signaling pathways, while also activating antioxidant factors through Sirt1/AMPK signaling pathways. Clove treatment also suppressed matrix metalloproteinase (MMP) overexpression and significantly increased the levels of tissue inhibitors of metalloproteinases (TIMPs). Conclusions: Treatment with cloves effectively reversed MIA-induced effects. Therefore, clove treatment could have the potential to protect against or treat OA.
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