• 대한치과교정학회지
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• 제53권2호
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• pp.125-136
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• 2023

Before progress was recently made in the application of temporary anchorage devices (TADs) in bio-mechanical design, orthodontists were rarely able to intrude molars to reduce upper posterior dental height (UPDH). However, TADs are now widely used to intrude molars to flatten the occlusal plane or induce counterclockwise rotation of the mandible. Previous studies involving clinical or animal histological evaluation on changes in periodontal conditions after molar intrusion have been reported, however, studies involving human histology are scarce. This case was a Class I malocclusion with a high mandibular plane angle. Upper molar intrusion with TADs was performed to reduce UPDH, which led to counterclockwise rotation of the mandible. After 5 months of upper molar intrusion, shortened clinical crowns were noticed, which caused difficulties in oral hygiene and hindered orthodontic tooth movement. The mid-treatment cone-beam computed tomography revealed redundant bone physically interfering with buccal attachment and osseous resective surgeries were followed. During the surgeries, bilateral mini screws were removed and bulging alveolar bone and gingiva were harvested for biopsy. Histological examination revealed bacterial colonies at the bottom of the sulcus. Infiltration of chronic inflammatory cells underneath the non-keratinized sulcular epithelium was noted, with abundant capillaries being filled with red blood cells. Proximal alveolar bone facing the bottom of the gingival sulcus exhibited active bone remodeling and woven bone formation with plump osteocytes in the lacunae. On the other hand, buccal alveolar bone exhibited lamination, indicating slow bone turnover in the lateral region.

• Journal of Ginseng Research
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• 제47권3호
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• pp.469-478
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• 2023

Background: Nitrogen (N) is an essential macronutrient for plant growth and development. To support agricultural production and enhance crop yield, two major N sources, nitrate and ammonium, are applied as fertilizers to the soil. Although many studies have been conducted on N uptake and signal transduction, the molecular genetic mechanisms of N-mediated physiological roles, such as the secondary growth of storage roots, remain largely unknown. Methods: One-year-old P. ginseng seedlings treated with KNO₃ were analyzed for the secondary growth of storage roots. The histological paraffin sections were subjected to bright and polarized light microscopic analysis. Genome-wide RNA-seq and network analysis were carried out to dissect the molecular mechanism of nitrate-mediated promotion of ginseng storage root thickening. Results: Here, we report the positive effects of nitrate on storage root secondary growth in Panax ginseng. Exogenous nitrate supply to ginseng seedlings significantly increased the root secondary growth. Histological analysis indicated that the enhancement of root secondary growth could be attributed to the increase in cambium stem cell activity and the subsequent differentiation of cambium-derived storage parenchymal cells. RNA-seq and gene set enrichment analysis (GSEA) revealed that the formation of a transcriptional network comprising auxin, brassinosteroid (BR)-, ethylene-, and jasmonic acid (JA)-related genes mainly contributed to the secondary growth of ginseng storage roots. In addition, increased proliferation of cambium stem cells by a N-rich source inhibited the accumulation of starch granules in storage parenchymal cells. Conclusion: Thus, through the integration of bioinformatic and histological tissue analyses, we demonstrate that nitrate assimilation and signaling pathways are integrated into key biological processes that promote the secondary growth of P. ginseng storage roots.

• Journal of Periodontal and Implant Science
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• 제54권1호
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• pp.25-36
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• 2024

Purpose: Mucogingival defects (MGDs), such as dental root recessions, decreased vestibular depth, and absence of keratinized tissues, are commonly seen in dental clinics. MGDs may result in functional, aesthetic, and hygienic concerns. In these situations, autogenous soft tissue grafts are considered the gold-standard treatment. This study compares the healing process of free gingival grafts (FGGs) to bacterial cellulose matrix (BCM) and human acellular dermal matrix (ADM) seeded with fibroblasts from culture supplemented with platelet-rich plasma in a rat model. Methods: Surgical defects were made in rats, which received the following treatments in a randomized manner: group I, negative control (defect creation only); group II, positive control (FGG); group III, BCM; group IV, BCM + fibroblasts; group V, ADM; and group VI, ADM + fibroblasts. Clinical, histological, and immunological analyses were performed 15 days after grafting. Clinical examinations recorded epithelium regularity and the presence of ulcers, erythema, and/or edema. Results: The histological analysis revealed the degree of reepithelization, width, regularity, and presence of keratin. The Fisher exact statistical test was applied to the results (P<0.05). No groups showed ulcers except for group I. All groups had regular epithelium without erythema and without edema. Histologically, all groups exhibited regular epithelium with keratinization, and myofibroblasts were present in the connective tissue. The groups that received engineered grafts showed similar clinical and histological results to the FGG group. Conclusions: Within the limitations of this study, it was concluded that BCM and ADM can be used as cell scaffolds, with ADM yielding the best results. This study supports the use of this technical protocol in humans.

• Anatomy and Cell Biology
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• 제56권4호
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• pp.435-440
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• 2023

Few studies have examined the basilar venous plexus (BVP) and to our knowledge, no previous study has described its histology. The present anatomical study was performed to better elucidate these structures. In ten cadavers, the BVP was dissected. The anatomical and histological evaluation of the intraluminal trabeculae within this sinus were evaluated. Once all gross measurements were made, the clivus and overlying BVP were harvested and submitted for histological analysis. A BVP was identified in all specimens and in each of these, intraluminal trabeculae were identified. The mean number of trabeculae per plexus was five. These were most concentrated in the upper half of the clivus and were more often centrally located. These septations traveled in a posterior to anterior direction and usually, from inferiorly to superiorly however some were noted to travel horizontally. In a few specimens the trabeculae had wider bases, especially on the posterior attachment to the meningeal layer of dura mater. More commonly, the trabeculae ended in a denticulate form at their two terminal ends. The trabeculae were on average were 0.85 mm in length. The mean width of the trabeculae was 0.35 mm. These septations were consistent with the cords of Willis as are found in the lumen of some of the other intradural venous sinuses. An understanding of the internal anatomy of the BVP can aid in our understanding of venous pathology. Furthermore, this knowledge will benefit patients undergoing interventional treatments that involve the BVP.

• Anatomy and Cell Biology
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• 제56권1호
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• pp.122-136
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• 2023

Depression is a prevalent global problem since ages, predominately treated with SSRI. Cipralex, is an antidepressant of the SSRIs class used as a remedy for mood, depression and anxiety. Silymarin (SIL), a natural free radical scavenging, has an antioxidant and anti-inflammatory properties. This hypothesis evaluates, for the first time, the role of cipralex on the structure of the endocrine and exocrine components of the pancreas and assess the beneficial effects of SIL on these changes. Forty-five rats were divided into control, cipralex, and cipralex plus SIL groups. During sacrifice, all rats and pancreases were weighed and the ratio of pancreatic weight (PW) to rat weight (RW) was calculated, blood samples were collected to estimate fasting glucose, insulin and amylase levels, the specimens were prepared for histological, immunohistochemical (inducible nitric oxide synthase [iNOS], tumour necrosis factor-alpha [TNF-α], caspase 3, proliferating cell nuclear antigen [PCNA], and anti-insulin antibody), and morphometrical studies. Cipralex group exhibited marked destruction of the pancreatic architecture of the exocrine and endocrine parts, with a dense collagen fiber deposition. Also, there is highly significant decrease (P<0.001) of PW/RT ratio, insulin, and amylase levels, the number and diameter of islets of Langerhans, the number of PCNA positive immunoreactive cells, and the number of insulin positive β-cells. Furthermore, a highly significant increase of glucose level, iNOS, TNF-α, and caspase-3 positive immunoreactive cells in the islets of Langerhans and acinar cells were observed. SIL improves the pancreatic histological architecture, weight loss, biochemical, and immunohistochemical analyses. Administering SIL is advantageous in managing cipralex induced pancreatic injury via its anti-inflammatory, antioxidant, and anti-apoptotic qualities.

• Anatomy and Cell Biology
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• 제56권3호
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• pp.374-381
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• 2023

Although the epiglottis plays a vital role in deglutition, histological studies of the epiglottis and surrounding ligaments associated with swallowing dysfunction are limited. Therefore, we performed histological observations to clarify age-related changes in the morphological characteristics of the epiglottis and surrounding structures. Tissue samples comprising the epiglottis and surrounding structures were collected from corpses that were both orally fed and tubefed during their lifetimes. Following hematoxylin and eosin, Elastica Van Gieson, and immunohistochemical staining procedures, the chondrocytes, connective tissue, and glandular tissue were observed under the epiglottis epithelium, and intervening adipose tissue was observed in the surrounding area. Fatty degeneration of acinar cells was also observed in the glandular tissue, possibly because of aging. Bundles of elastic fibers were present around the vascular wall in the peri-epiglottic ligament, but some were reduced. Furthermore, large amounts of collagen fibers ran toward and through the cartilage, whereas the mesh-like elastic fibers stopped in front of the cartilage. Microfibrils considered to be oxytalan fibers, which are thinner and shorter than elastic fibers, were observed around the vascular wall and in the fiber bundles. Age-related changes included connective tissue fibrosis shown by the large amount of collagen fibers, atrophy of salivary glands, and an accompanying increase in adipose tissue. Regarding stretchability and elasticity, the elastic fibers may have an auxiliary function for laryngeal elevation during deglutition. This suggests that disuse atrophy of the laryngeal organs with or without oral intake might reduce the amount of elastic fiber in older adults.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• 제4권1호
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• pp.18-27
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• 2001

목 적: 소아 H. pylori 위염에서 균 박멸 후의 조직학적 변화에 대한 연구는 거의 없는 실정이며 치료전의 조직소견과 균 박멸과의 관련성 또한 잘 밝혀져 있지 않다. 이에 저자들은 H. pylori 위염 소아들을 대상으로 치료 전후의 내시경 및 조직소견을 분석하여 균 박멸로 초래되는 위염의 내시경적, 조직학적 변화 및 균 박멸의 성공에 영향을 주는 치료 전 조직소견들을 알아보고자 하였다. 방 법: 95년 6월부터 99년 5월까지 만성 복통으로 내원하여 치료 전후 내시경 생검을 시행받은 소아들 중 조직 검사상 균이 관찰되면서 urease 검사가 양성인 만성위염 소아 42명을 대상으로 하였다. 박멸요법 후 4주 이후에 추적 내시경 검사를 시행하여 위 두 가지 검사 및 배양 검사가 모두 음성인 경우를 균 박멸로 판정하였고, 조직 소견상 위전정부의 균밀도 및 염증 소견들을 최근의 시드니 위염분류법에 따라 0, 1, 2, 3으로 등급화하여 분석하였다. 또한 OAC로 치료받은 32명의 소아들을 박멸에 성공한 군과 실패한 군으로 나누어 각각의 경우 시드니 위염분류법에 따른 치료 전 조직 소견에 차이가 있는지를 분석하였다. 결 과: 1) 균이 박멸된 소아들(27례)의 경우 결절성 위염은 치료 전 89%에서 치료 후 63%로 유의하게 감소하였다(p<0.05). 조직 소견상 호중구 침윤등급은 평균 2.06에서 0.24로 현저하게 감소하였고(p<0.01), 만성염증세포 침윤등급은 평균 2.61에서 1.89로 유의하게 감소하였으나(p<0.05) 완전히 호전된 예는 없었다. 림프여포는 48%에서 15%로 유의하게 감소하였고(p<0.05), 점막 상피손상은 치료 후 모두 소실되었다. 균박멸에 실패한 소아들(15례)의 경우는 치료 전후 결절성 위염의 빈도, 조직 소견상 호중구 및 만성염증세포 침윤등급, 림프여포의 빈도에 유의한 변화가 없었다. 2) OAC 세 약제 치료 후 성공적으로 균이 박멸된 소아들(18례)과 균 박멸에 실패한 소아들(14례)의 치료전 내시경 소견과 조직소견을 비교하였을 때 결절성 위염의 빈도, 호중구 및 만성 염증세포침윤등급, 림프 여포 및 상피손상의 빈도에 모두 유의한 차이가 없었으나, 균밀도는 균박멸에 실패한 소아들에서 더 높은 경향을 보였다(p=0.072). 결 론: 소아 H. pylori 위염에서 균박멸 치료 4주 이후 호중구 침윤은 현저한 감소를 보이며, 만성염증세포 침윤정도, 림프여포와 내시경상 결절성 위염도 의미 있는 호전을 보인다. 시드니 위염분류법에 따른 치료 전의 조직학적인 등급 중 균밀도는 높을수록 균박멸이 낮은 경향이 있어서 치료의 성공여부를 예측하는 데 이용될 수 있는 가능성이 있다.

• Tuberculosis and Respiratory Diseases
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• 제45권1호
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• pp.45-56
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• 1998

연구배경: 최근 폐암은 전세계적인 증가 추세에 놓여 있을 뿐 아니라 서구에서는 여성 폐암 환자의 비율이 크게 늘고 있고 조직학적으로는 이미 선암이 가장 많은 비율을 차지하고 있는 등의 임상적인 면에도 변화가 생기고 있어 본과에서도 최근의 환자들에 대한 임상적 고찰을 통해 이러한 흐름을 파악해 보기로 하였다. 방 법: 1990년 1월부터 1996년 7월까지 본과에 입원하여 원발성 폐암으로 진단받은 212예를 대상으로 하여 연령별 및 성별로 나누고 내원 당시의 증상, 흡연 습관, 진단방법 및 진단양성율, 조직학적 및 병기별 분포와 치료 방법등에 따라 세분하여 관찰하였다. 곁 과: 1) 총 212예 중 남성이 178예, 여성이 34예로 5.2 : 1의 성비를 보였으며 연령별로는 60대가 35.4%로 가장 많았고 40대 미만의 예는 5.2%였다. 2) 주증상은 기침, 호흡곤란, 흉통 등의 순이었으며 초발 증상 발현 이후 내원까지의 기간은 대부분 3개월 이내(57.7%)였고, 1년 이상이 지나 내원한 경우도 13예(6.5%)였으며 1980년대를 기점으로 조기 내원율이 크게 증가하였다. 3) 전체 환자 중 흡연자는 77.2%였으며, 편평상피 세포암과 소세포암 환자에서 흡연자의 비율은 각각 88.4%, 85.7%로 높은 상관관계를 보이는 반면 선암의 경우는 55.7% 가 흡연자였다. 4) 조직학적으로 편평상피세포암이 44.8%로 가장 많았으며 이어 선암(30.7%), 소세포암(17.0%), 대세포암(3.8%) 순으로 선암이 증가 추세에 있고, 병기별로는 비소세포암의 경우 제 IIIb 병기 이상의 수술이 불가능한 경우가 72.1%였으며 소세포암의 경우는 제한기와 전신기가 각각 48.6%, 51.4%로 비슷하게 나타났다. 5) 진단양성율은 단순객담세포검사의 경우 75.3%, 경기관지 조직생검시 65.7%였으며, 임파절 흡인검사 95.8%, 경피적 폐침흡인검사 94.6%이고 개흉검사상에서는 100% 진단 가능했으며 전반적으로 과거에 비해 진단율이 향상되었다. 6) 내원당시의 활동 능력은 ECOG 1(46.7%), 0(26.2%)의 순으로 비교적 양호하였고, 진단 이후 69.3%의 환자에게 화학 혹은 방사선 치료가 시행되었고, 수술을 받은 경우는 7.5% 에 불과했다. 곁 론: 본 연구에서는 아직 편평상피세포암이 가장 많으나 과거에 비해 흡연파 비교적 상관관계가 적은 선암이 꾸준한 증가 추세에 있어 흡연 이외의 다른 발암 기전에 관한 관심이 요구되며 진단 당시 진행된 병기에 비해 양호한 활동 능력을 보이는 바 폐암의 선별 검사 및 조기진단의 중요성이 강조되나 아직까지 생존율을 크게 증가시킬 수 있는 뚜렷한 치료 방법이 없는 관계로 무엇보다 금연등 예방이 중요하다고 생각한다.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제38권1호
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• pp.29-37
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• 2012

Introduction: Fibrous-osseous lesions of the jaws are difficult to diagnose precisely until excised biopsy results are found, so they might be confused with malignant lesions. This clinical study focused on the diagnostic aids of lesions that demonstrate different clinical, radiologic, and histological findings. Materials and Methods: A total of 16 patients with benign fibrous-osseous lesions on the jaws (6 fibrous dysplasias, 6 ossifying fibromas, 3 cemental dysplasias, and one osteoblastoma) were reviewed. Nine patients with malignant fibrous-osseous lesions (8 osteosarcomas and one Ewing's sarcoma) were also retrospectively reviewed. Results: Osteosarcoma patients complained of facial swelling and tooth mobility. The radiographic findings showed the irregular resorption of cortical bone and periosteal reactions. Histological features included cellular pleomorphism and atypical mitosis. An Ewing's sarcoma patient complained of tooth mobility and facial swelling. Onion-skin appearance and irregular expansile marginal bony radiolucency were seen in the radiography. Fibrous dysplasia patients complained of facial swelling and asymmetry. The radiographic features were mostly ground-glass radiopacity. Histological findings showed a bony trabeculae pattern surrounded by fibrous ground substances. Ossifying fibroma patients complained of buccal swelling and jaw pains, showing expanded cortical radiolucent lesions with a radiopaque margin. Histological findings were revealed as cellular fibrous stroma with immature woven bones. In cemental dysplasia, most of their lesions were found in a routine dental exam. Well-circumscribed radiopaque lesions were observed in the radiography, and cementum-like ossicles with fibrous stroma were seen in the microscopy. An osteoblastoma patient complained of jaw pain and facial swelling. Radiographic findings were mottled, dense radiopacity with osteolytic margin. Trabeculae of the osteoid with a vascular network and numerous osteoblasts with woven bone were predominantly found in the microscopy. Conclusion: Our study showed similar results as other studies. We suggest the clinical parameters of diagnosis and treatment for malignant and benign fibrous-osseous lesions of the jaws.

• Korean Journal of Acupuncture
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• 제24권4호
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• pp.201-219
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• 2007

Objectives : We studied Effects of Hagocho(prunella vulgaris L.), Gamgook(chrysanthemum indicum L.) and Galgeun(pueraria Radix) aqua-acupuncture on the hyperlipidemic rat. methods : We investigated lowering lipid effect, oxidative capacity, concentration of TNF-${\alpha}$, IL-6, Leptin and histological consideration in hyperlipidemic rat. Forty male Sprague-Dawley rats weighing about 400g were divided into 5 groups of control, Ⅰ: Hagocho (prunella vulgaris L.)+Gamgook (chrysanthemum indicum L.) and Gokji aqua-acupuncture, Ⅱ: Hagocho(prunella vulgaris L.)+Gamgook (chrysanthemum indicum L.) and Joksamri aqua-acupuncture, Ⅲ: Hagocho(prunella vulgaris L.)+Galgeun(pueraria Radix)and Gokji aqua-acupuncture and Ⅳ: Hagocho (prunella vulgaris L.)+Galgeun(pueraria Radix) and Joksamri aqua-acupuncture. Results : Contents of plasma ${\beta}$-lipoprotein, contents of IL-6, TNF-${\alpha}$ and leptin, Plasma triglyceride and glucose, plasma total cholesterol and LDL-cholesterol, liver total cholesterol, liver triglyceride, plasma and liver TBARS, free fatty acids showed a tendency to decrease in the aqua-acupuncture groups compared to those of control group. The activities of GOT and GPT showed no significantly different in all treatment groups. Values of super oxide dismutase, glutathione peroxidase and catalase activity showed a tendency to increase in the aqua-acupuncture groups. Histological consideration of heart, kidney and liver in the aqua-acupuncture groups showed slight vasodilation and fat accumulation compared to those of normal rat. Conclusions : These results indicated that prunella vulgaris L., chrysanthemum indicum L. and pueraria Radix aqua-acupuncture at gokji(LI11) and Joksamri(ST36) suppressed adipose tissue mass and lipid peroxidation and increased antioxidant system in hyperlipidemic rat.