Viral load and the duration of viral shedding of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) are important determinants of the transmission of coronavirus disease 2019.In this study, we examined the effects of viral doses on the lung and spleen of K18-hACE2 transgenic mice by temporal histological and transcriptional analyses. Approximately, 1×105 plaque-forming units (PFU) of SARS-CoV-2 induced strong host responses in the lungs from 2 days post inoculation (dpi) which did not recover until the mice died, whereas responses to the virus were obvious at 5 days, recovering to the basal state by 14 dpi at 1×102 PFU. Further, flow cytometry showed that number of CD8+ T cells continuously increased in 1×102 PFU-virusinfected lungs from 2 dpi, but not in 1×105 PFU-virus-infected lungs. In spleens, responses to the virus were prominent from 2 dpi, and number of B cells was significantly decreased at 1×105PFU; however, 1×102 PFU of virus induced very weak responses from 2 dpi which recovered by 10 dpi. Although the defense responses returned to normal and the mice survived, lung histology showed evidence of fibrosis, suggesting sequelae of SARS-CoV-2 infection. Our findings indicate that specific effectors of the immune response in the lung and spleen were either increased or depleted in response to doses of SARS-CoV-2. This study demonstrated that the response of local and systemic immune effectors to a viral infection varies with viral dose, which either exacerbates the severity of the infection or accelerates its elimination.

Background: As the number of large-scale studies involving multiple organizations producing data has steadily increased, an integrated system for a common interoperable format is needed. In response to the coronavirus disease 2019 (COVID-19) pandemic, a number of global efforts are underway to develop vaccines and therapeutics. We are therefore observing an explosion in the proliferation of COVID-19 data, and interoperability is highly requested in multiple institutions participating simultaneously in COVID-19 pandemic research. Results: In this study, a laboratory information management system (LIMS) approach has been adopted to systemically manage various COVID-19 non-clinical trial data, including mortality, clinical signs, body weight, body temperature, organ weights, viral titer (viral replication and viral RNA), and multiorgan histopathology, from multiple institutions based on a web interface. The main aim of the implemented system is to integrate, standardize, and organize data collected from laboratories in multiple institutes for COVID-19 non-clinical efficacy testings. Six animal biosafety level 3 institutions proved the feasibility of our system. Substantial benefits were shown by maximizing collaborative high-quality non-clinical research. Conclusions This LIMS platform can be used for future outbreaks, leading to accelerated medical product development through the systematic management of extensive data from non-clinical animal studies.

The aim of this study was to anatomize the therapeutic potential of alaternin (=7-hydroxyemodin) against inflammation, advanced glycation end products (AGEs) formation, tyrosinase, and two cyclin-dependent kinases (CDKs), CDK2 and CDK4, and compare its potency with emodin. Alaternin showed lower cytotoxicity and higher dose-dependent inhibition against lipopolysaccharide (LPS) induced nitric oxide (NO) production with half maximal inhibitory concentration (IC 50 ) of 18.68 µM. Similarly, alaternin efficaciously inhibited biotransformation of fluorescent AGEs and amyloid cross-β structure on the bovine serum albumin (BSA)-glucose-fructose system, five times more than emodin. Interestingly, alaternin also showed selective activity against CDK4 at 170 µM, whereas emodin inhibited both CDK2 and CDK4 at a concentration of 17 and 380 µM respectively. In addition, alaternin showed dose-dependent inhibitory activity against mushroom tyrosinase with inhibition percentage of 35.84 % at 400 µM. Altogether, alaternin with pronounced inhibition against inflammatory mediator (NO), glycated products formation, and targeted inhibition towards CDK4 receptor can be taken as an important candidate to target multiple diseases.

The aim of this study was to anatomize the therapeutic potential of alaternin (=7-hydroxyemodin) against inflammation, advanced glycation end products (AGEs) formation, tyrosinase, and two cyclin-dependent kinases (CDKs), CDK2 and CDK4, and compare its potency with emodin. Alaternin showed lower cytotoxicity and higher dose-dependent inhibition against lipopolysaccharide (LPS) induced nitric oxide (NO) production with half maximal inhibitory concentration (IC 50 ) of 18.68 µM. Similarly, alaternin efficaciously inhibited biotransformation of fluorescent AGEs and amyloid cross-β structure on the bovine serum albumin (BSA)-glucose-fructose system, five times more than emodin. Interestingly, alaternin also showed selective activity against CDK4 at 170 µM, whereas emodin inhibited both CDK2 and CDK4 at a concentration of 17 and 380 µM respectively. In addition, alaternin showed dose-dependent inhibitory activity against mushroom tyrosinase with inhibition percentage of 35.84 % at 400 µM. Altogether, alaternin with pronounced inhibition against inflammatory mediator (NO), glycated products formation, and targeted inhibition towards CDK4 receptor can be taken as an important candidate to target multiple diseases.

The Asian Society of Gynecologic Oncology International Workshop 2018 on gynecologic oncology was held in the Ajou University Hospital, Suwon, Korea on the 24th to 25th August 2018. The workshop was an opportunity for Asian doctors to discuss the latest findings of gynecologic cancer, including cervical, ovarian, and endometrial cancers, as well as the future of fertility-sparing treatments, minimally invasive/radical/debulking surgery, radiotherapy, chemotherapy, targeted therapy, and immunotherapy. Clinical guidelines and position statement of Asian countries were presented by experts. Asian clinical trials for gynecologic cancers were reviewed and experts emphasized the point that original Asian study is beneficial for Asian patients. In Junior session, young gynecologic oncologists presented their latest research on gynecologic cancers.
Antineoplastic Agents ; Asian Continental Ancestry Group ; Drug Therapy ; Education ; Endometrial Neoplasms ; Female ; Gyeonggi-do ; Humans ; Immunotherapy ; Korea ; Ovarian Neoplasms ; Radiotherapy ; Uterine Cervical Neoplasms

PURPOSE: To analyze and compare the results of three different surgical methods - closed reduction and percutaneous pinning (Group I), bifurcated plate and tension band wiring (Group II), locking compression plate (Group III), - for displaced two- and three-part proximal humeral fractures. MATERIALS AND METHODS: Sixteen patients were treated with a closed reduction and percutaneous pinning, 19 with bifurcated plate and tension band wiring and 18 with locking compression plate. All patients were followed up for more than 1 year, and were reviewed and evaluated with respect to radiological and clinical results. The radiological results were evaluated by bony union and humerus neck shaft angle using the Paavolainen method. The clinical results were evaluated by Neer's evaluation criteria. RESULTS: Bony union rate, time period to achieve bony union, neck shaft angle and clinical results in Groups II and III were better than those in Group I (p<0.05). There were no significant differences between Groups II and III. We observed trends for worse clinical outcomes in patients older than 65 years compared with those in patients younger than 65 years. Clinical outcome for patients older than 65 years in Group III (average 87.5 points) was better than that for the same age group in Groups I (average 77.2 points) and II (average 79.3 points), but the cohorts were too small to obtain statistical significance. Complication rate in Groups II, III was lower than that in Group I (p=0.005). CONCLUSION: The radiological and clinical results in Groups II and III were significantly better than those in Group I, and there were no significant differences between Groups II and III. We thought that bifurcated plate and tension band wiring and locking compression plate were useful surgical methods for displaced two- and three-part proximal humeral fractures.
Cohort Studies ; Humans ; Humerus ; Neck ; Shoulder Fractures

Collision tumor means the coexistence of two adjacent, but histologically distinct tumors without histologic admixture in the same tissue and is rare incidence involving ovary. Because of their incidence of occurrence, benign cystic teratomas often occur coincidentally with other abnormalities of the ovary. Most common histologic combination of collision tumor in the ovary is coexistence of teratoma with mucinous tumors. But its association with serous tumor has been noted rare and incidence is unknown. We have experienced a case laparoscopic treatment of a huge serous cystadenoma combined with ovarian benign cystic teratoma in right ovary, and report it with a brief review of literature.
Cystadenoma, Serous ; Dermoid Cyst ; Female ; Incidence ; Laparoscopy ; Mucins ; Ovary ; Teratoma

BACKGROUND: This study aims to report clinical outcome and long term graft and patient survival rate of one thousand kidney transplantation. We analyzed risk factors that impact on graft survival in the 1,000 case of kidney transplantation through this study. METHODS: We have performed 1,000 cases of kidney transplantation in Samsung Medical Center, Seoul, Korea from February 1995 to January 2008. We retrospectively reviewed medical record of recipients and donors. RESULTS: The mean follow up period was 69 months. Composition of type of donor was living donor, 653 cases and deceased donor, 347 cases. Type of donor source was mostly living-related type. 94 cases had graft failure. Major cause of graft failure was chronic allograft nephropathy. And major viral infection was cytomegalovirus infection. Major non-viral infection was urinary tract infection. 47 cases of immediate post operative complication was diagnosed as lymphocele. Overall 10-year graft survival rate was 83.9% respectively. 10-year patient survival rate was 95.7% respectively. 10-year graft survival and patient survival of recipient were significantly different between living donation group and deceased donation group. CONCLUSIONS: In this report, only two risk factor were statically significant difference.
Cytomegalovirus Infections ; Follow-Up Studies ; Graft Survival ; Humans ; Kidney ; Kidney Transplantation ; Korea ; Living Donors ; Lymphocele ; Medical Records ; Retrospective Studies ; Risk Factors ; Survival Rate ; Tissue Donors ; Transplantation, Homologous ; Transplants ; Urinary Tract Infections

PURPOSE: I adopted two genomics technology, high-density microarray and DNA pooling for identification of knee osteoarthritis susceptibility loci in human genome. MATERIAL AND METHODS: DNA was purified from periphral blood from 26 cases of female osteoarthritis patients and 26 normal female controls. DNAs are pooled and used in microarray analysis. Results from qualitative analysis of microarray showed that 708 SNPs differ between case and control. RESULTS: Of 708 SNPs, 167 SNPs were clustered. These SNPs constitute 23 'Clustered SNPs' and 64 genes were marked. 20 Clustered SNPs were marked at the same gene. So total 67 loci were identified. Among them ST6GALIII and CHST9 were genes coding structural proteins of cartilage. FATJ and CDH12 were genes coding cadherins related with cell-cell interaction. GRM7 codes metabotropic glutamate receptor 7 which is related with pain perception in arthritis. PLA2G4A codes phospholipase 2 which is related with production of inflammatory molecules. CONCLUSION: These gene loci are candidates for further genomic and functional analysis to clarify the genetic predisposition in knee osteoarthritis.
Arthritis ; Cadherins ; Cartilage ; Clinical Coding ; DNA* ; Female ; Genetic Predisposition to Disease ; Genome, Human ; Genomics ; Humans ; Knee* ; Microarray Analysis ; Osteoarthritis ; Osteoarthritis, Knee* ; Pain Perception ; Phospholipases ; Polymorphism, Single Nucleotide ; Receptors, Metabotropic Glutamate

The association of neoplastic disease and thromboembolic disorder was first recognized by Trousseau in 1865. Since then, thromboembolic events have often been reported in a variety of malignant conditions. Recently, we experienced an unusual case of a 67-year-old ovarian cancer patient with extensive thromboembolic events involving lung, brain, extremity and abdominal cavity. In this report, we describe a systemic coagulopathy fluctuating in accordance with anticoagulant therapy, and have special regard for a role of anticoagulants for the treatment of this syndrome.
Abdominal Cavity ; Aged ; Anticoagulants ; Brain ; Extremities ; Humans ; Lung ; Ovarian Neoplasms ; Thromboembolism