1.Phytotherapeutic BS012 and Its Active Component Ameliorate Allergic Asthma via Inhibition of Th2-Mediated Immune Response and Apoptosis
Siqi ZHANG ; Joonki KIM ; Gakyung LEE ; Hong Ryul AHN ; Yeo Eun KIM ; Hee Ju KIM ; Jae Sik YU ; Miso PARK ; Keon Wook KANG ; Hocheol KIM ; Byung Hwa JUNG ; Sung Won KWON ; Dae Sik JANG ; Hyun Ok YANG
Biomolecules & Therapeutics 2024;32(6):744-758
Asthma is a chronic inflammatory disorder of the lungs that results in airway inflammation and narrowing. BS012 is an herbal remedy containing Asarum sieboldii, Platycodon grandiflorum, and Cinnamomum cassia extracts. To elucidate the anti-asthma effect of BS012, this study analyzed the immune response, respiratory protection, and changes in metabolic mechanisms in an ovalbumininduced allergic asthma mouse model. Female BALB/c mice were exposed to ovalbumin to induce allergic asthma. Bronchoalveolar lavage fluid and plasma were analyzed for interleukin and immunoglobulin E levels. Histological analyses of the lungs were performed to measure morphological changes. Apoptosis-related mediators were assayed by western blotting. Plasma and lung tissue metabolomic analyses were performed to investigate the metabolic changes. A T-helper-2-like differentiated cell model was used to identify the active components of BS012. BS012 treatment improved inflammatory cell infiltration, mucus production, and goblet cell hyperplasia in lung tissues. BS012 also significantly downregulated ovalbumin-specific immunoglobulin E in plasma and T-helper-2-specific cytokines, interleukin-4 and -5, in bronchoalveolar lavage fluid. The lungs of ovalbumin-inhaled mice exhibited nerve growth factor-mediated apoptotic protein expression, which was significantly attenuated by BS012 treatment. Ovalbumin-induced abnormalities in amino acid and lipid metabolism were improved by BS012 in correlation with its anti-inflammatory properties and normalization of energy metabolism. Additionally, the differentiated cell model revealed that N-isobutyl-dodecatetraenamide is an active component that contributes to the anti-allergic properties of BS012. The current findings demonstrate the anti-allergic and respiratory protective functions of BS012 against allergic asthma, which can be considered a therapeutic candidate.
2.Evaluation of the antimalarial activity of SAM13-2HCl with morpholine amide (SKM13 derivative) against antimalarial drug-resistant Plasmodium falciparum and Plasmodium berghei infected ICR mice
Hyelee HONG ; Kwonmo MOON ; Thuy-Tien Thi TRINH ; Tae-Hui EOM ; Hyun PARK ; Hak Sung KIM ; Seon-Ju YEO
Parasites, Hosts and Diseases 2024;62(1):42-52
Antimalarial drugs are an urgently need and crucial tool in the campaign against malaria, which can threaten public health. In this study, we examined the cytotoxicity of the 9 antimalarial compounds chemically synthesized using SKM13-2HCl. Except for SKM13-2HCl, the 5 newly synthesized compounds had a 50% cytotoxic concentration (CC50) > 100 µM, indicating that they would be less cytotoxic than SKM13-2HCl. Among the 5 compounds, only SAM13-2HCl outperformed SKM13-2HCl for antimalarial activity, showing a 3- and 1.3-fold greater selective index (SI) (CC50/IC50) than SKM13-2HCl in vitro against both chloroquine-sensitive (3D7) and chloroquine -resistant (K1) Plasmodium falciparum strains, respectively. Thus, the presence of morpholine amide may help to effectively suppress human-infectious P. falciparum parasites. However, the antimalarial activity of SAM13-2HCl was inferior to that of the SKM13-2HCl template compound in the P. berghei NK65-infected mouse model, possibly because SAM13-2HCl had a lower polarity and less efficient pharmacokinetics than SKM13-2HCl. SAM13-2HCl was more toxic in the rodent model. Consequently, SAM13-2HCl containing morpholine was selected from screening a combination of pharmacologically significant structures as being the most effective in vitro against human-infectious P. falciparum but was less efficient in vivo in a P. berghei-infected animal model when compared with SKM13-2HCl. Therefore, SAM13-2HCl containing morpholine could be considered a promising compound to treat chloroquine-resistant P. falciparum infections, although further optimization is crucial to maintain antimalarial activity while reducing toxicity in animals.
3.Long Term Clinical Outcomes of Gastric Mucosa-Associated Lymphoid Tissue Lymphoma: A Single Center Study
Seong Hyun KOH ; Seung Hyun YEO ; Moo In PARK ; Kyoungwon JUNG ; Sung Eun KIM ; Won MOON ; Seun Ja PARK
The Korean Journal of Helicobacter and Upper Gastrointestinal Research 2024;24(1):64-71
Objectives:
Few studies have reported long-term follow-up after treatment of gastric mucosaassociated lymphoid tissue (MALT) lymphoma. In this single-center study, we investigated longterm treatment outcomes in patients diagnosed with gastric MALT lymphoma.
Methods:
The study included 80 patients diagnosed with gastric MALT lymphoma, who were followed up at a single center between January 2005 and December 2019 after Helicobacter pylori eradication therapy, radiotherapy, or chemotherapy. We evaluated complete remission, improvement, or recurrence of the lesion. Follow-up over >60 months was classified as long-term follow-up, and the progression-free survival rate was recorded.
Results:
Following H. pylori eradication treatment, complete remission occurred in 85.9% (55/64) of H. pylori-positive and 50.0% (3/6) of H. pylori-negative patients. All patients with gastric MALT lymphoma who did not respond to H. pylori eradication therapy (100.0% [6/6]) achieved complete remission following administration of local radiotherapy. We observed no deaths on long-term follow-up (>60 months), and the progression-free survival was 101 months.
Conclusions
In this study, patients with gastric MALT lymphoma showed excellent survival rates, progression-free survival, and prognosis on long-term follow-up. Prospective studies are warranted to determine the long-term prognosis of gastric MALT lymphoma after treatment.
4.Effectiveness of Korean Red Ginseng on fatigue in patients with rheumatic diseases: a randomized, double-blind, placebo-controlled study
Soo-Kyung CHO ; Yeo-Jin SONG ; Jung-Yong HAN ; Hye Won KIM ; Eunwoo NAM ; Yoon-Kyoung SUNG
The Korean Journal of Internal Medicine 2024;39(4):680-690
Background:
To evaluate the effectiveness of Korean Red Ginseng (KRG) in managing fatigue in Korean patients with rheumatic diseases
Methods:
Patients were randomly assigned to KRG (2 g/day, n = 60) or placebo (n = 60) groups for 12 weeks of blind phase and then open-label KRG from weeks 12 to 24 (placebo-KRG, continuous-KRG). The primary outcome was the improvement rate in fatigue, defined by an increase in Functional Assessment of Chronic Illness Therapy (FACIT)-Fatigue scores at 12 weeks. Secondary outcomes included changes in FACIT-Fatigue and fatigue visual analog scale (VAS) between 0 and 12 weeks and those changes in both indices at 24 weeks.
Results:
The study enrolled 120 patients (Sjogren syndrome [n = 53], rheumatoid arthritis [n = 43], or both diseases [n = 24]). The mean age was 50.9 ± 11.6 years, with 97.5% being female. Baseline characteristics were similar between the two groups. The improvement rate in FACIT-Fatigue after 12 weeks was higher in the KRG group than in the placebo group, but the difference was statistically insignificant (38.3% vs. 26.7%, p = 0.242). Improvement in fatigue was observed in both groups by increases in FACIT-F (4.6 vs. 4.0) and reductions in fatigue VAS (-16.0 vs. -12.2) scores at 12 weeks. The most frequently reported adverse events during KRG use were pruritus and urticarial, with no significant difference between the two groups.
Conclusions
Both KRG and placebo groups showed significant reductions in fatigue. KRG treatment for 24 weeks did not reduce fatigue symptoms more than the placebo in patients with rheumatic diseases.
5.Comparative Evaluation of Osseointegration Parameters between Titanium and Zirconia Implants Placed in Beagle Dogs
Kihyun KIM ; Jun-Beom LEE ; Nguyen Pham-Hanh LUONG ; In-Sung Luke YEO ; Yang-Jo SEOL
Journal of implantology and applied sciences 2024;28(3):134-141
Purpose:
Endosseous titanium dental implants are widely regarded as the gold standard for replacing missing teeth. Despite the proven osseointegration of titanium implants, particularly those with enhanced surface modifications, concerns remain regarding esthetics, the risk of peri-implantitis, and potential hypersensitivity. Consequently, alternative materials, such as zirconia, have received increasing attention in recent years. This study evaluated the osseointegration parameters of zirconia implants placed in the mandibles of beagle dogs, as a preliminary in vivo evaluation of zirconia dental implants in South Korea.
Materials and Methods:
Seven 8-month-old beagle dogs underwent premolar extraction followed by placement of implants in the healed mandibular ridges. The following implants were used in this study: six turned-surface titanium implants, six rough-surface titanium implants, and six zirconia implants, following which the implants and surrounding tissues were harvested en bloc for histological analyses. Bone-to-implant contact (BIC) and new bone area (BA) percentages (%) were calculated and compared between the groups. Statistical analyses were conducted using ANOVA, with the significance level set at p < .05.
Results:
Histological analysis revealed no statistically significant difference in BIC between the rough-surface titanium and zirconia implants, although the turned-surface titanium implants exhibited significantly lower BIC than the other two groups (p < .05). No significant differences were found among the three groups in terms of BA.
Conclusion
The results of this study demonstrate that zirconia implants achieve BIC comparable to that of rough-surface titanium implants, suggestive of their potential clinical application.
6.Pathological Evaluation of the Therapeutic Effects of Argon Plasma Coagulation in Gastric Low-Grade Dysplasia
Min Kyung YEO ; Sun Hyung KANG ; Hyun Seok LEE ; Hyuk Soo EUN ; Hee Seok MOON ; Eaum Seok LEE ; Seok Hyun KIM ; Jae Kyu SUNG ; Byung Seok LEE
The Korean Journal of Helicobacter and Upper Gastrointestinal Research 2024;24(4):353-359
Objectives:
Gastric dysplasia is primarily treated using endoscopic resection. Although argon plasma coagulation (APC) is an alternative treatment for older patients or those with bleeding tendencies, studies have reported a higher rate of local recurrence after APC than after endoscopic resection. Using pathological examinations, this study aimed to investigate the incidence and associated causative factors of residual dysplasia following APC.
Methods:
This prospective study recruited patients with low-grade gastric dysplasia from March 2020 to February 2021 and conducted follow-up examinations for 15 months after enrollment of the last patient. The patients were randomly assigned to undergo APC at an output power setting of 45, 60, or 80 W.
Results:
Residual lesions were found in 13 of 68 patients (19.1%) during the 24-h follow-up endoscopy and biopsy. The Ki-67 index, a marker of cellular proliferation, was significantly associated with the presence of residual lesions. The presence of residual dysplasia at the three-month follow-up was associated with the presence of residual lesions at the 24-h follow-up and a positive Ki-67 index. Only three of the 13 patients with residual lesions 24 h after APC demonstrated residual lesions at the three-month follow up. No post-procedural complications were observed.
Conclusions
Residual dysplasia may persist even after APC and cause local recurrence. If Ki-67-positive cells are detected in the remnant tissue following APC, additional interventions should be considered.
7.Pathological Evaluation of the Therapeutic Effects of Argon Plasma Coagulation in Gastric Low-Grade Dysplasia
Min Kyung YEO ; Sun Hyung KANG ; Hyun Seok LEE ; Hyuk Soo EUN ; Hee Seok MOON ; Eaum Seok LEE ; Seok Hyun KIM ; Jae Kyu SUNG ; Byung Seok LEE
The Korean Journal of Helicobacter and Upper Gastrointestinal Research 2024;24(4):353-359
Objectives:
Gastric dysplasia is primarily treated using endoscopic resection. Although argon plasma coagulation (APC) is an alternative treatment for older patients or those with bleeding tendencies, studies have reported a higher rate of local recurrence after APC than after endoscopic resection. Using pathological examinations, this study aimed to investigate the incidence and associated causative factors of residual dysplasia following APC.
Methods:
This prospective study recruited patients with low-grade gastric dysplasia from March 2020 to February 2021 and conducted follow-up examinations for 15 months after enrollment of the last patient. The patients were randomly assigned to undergo APC at an output power setting of 45, 60, or 80 W.
Results:
Residual lesions were found in 13 of 68 patients (19.1%) during the 24-h follow-up endoscopy and biopsy. The Ki-67 index, a marker of cellular proliferation, was significantly associated with the presence of residual lesions. The presence of residual dysplasia at the three-month follow-up was associated with the presence of residual lesions at the 24-h follow-up and a positive Ki-67 index. Only three of the 13 patients with residual lesions 24 h after APC demonstrated residual lesions at the three-month follow up. No post-procedural complications were observed.
Conclusions
Residual dysplasia may persist even after APC and cause local recurrence. If Ki-67-positive cells are detected in the remnant tissue following APC, additional interventions should be considered.
8.Phytotherapeutic BS012 and Its Active Component Ameliorate Allergic Asthma via Inhibition of Th2-Mediated Immune Response and Apoptosis
Siqi ZHANG ; Joonki KIM ; Gakyung LEE ; Hong Ryul AHN ; Yeo Eun KIM ; Hee Ju KIM ; Jae Sik YU ; Miso PARK ; Keon Wook KANG ; Hocheol KIM ; Byung Hwa JUNG ; Sung Won KWON ; Dae Sik JANG ; Hyun Ok YANG
Biomolecules & Therapeutics 2024;32(6):744-758
Asthma is a chronic inflammatory disorder of the lungs that results in airway inflammation and narrowing. BS012 is an herbal remedy containing Asarum sieboldii, Platycodon grandiflorum, and Cinnamomum cassia extracts. To elucidate the anti-asthma effect of BS012, this study analyzed the immune response, respiratory protection, and changes in metabolic mechanisms in an ovalbumininduced allergic asthma mouse model. Female BALB/c mice were exposed to ovalbumin to induce allergic asthma. Bronchoalveolar lavage fluid and plasma were analyzed for interleukin and immunoglobulin E levels. Histological analyses of the lungs were performed to measure morphological changes. Apoptosis-related mediators were assayed by western blotting. Plasma and lung tissue metabolomic analyses were performed to investigate the metabolic changes. A T-helper-2-like differentiated cell model was used to identify the active components of BS012. BS012 treatment improved inflammatory cell infiltration, mucus production, and goblet cell hyperplasia in lung tissues. BS012 also significantly downregulated ovalbumin-specific immunoglobulin E in plasma and T-helper-2-specific cytokines, interleukin-4 and -5, in bronchoalveolar lavage fluid. The lungs of ovalbumin-inhaled mice exhibited nerve growth factor-mediated apoptotic protein expression, which was significantly attenuated by BS012 treatment. Ovalbumin-induced abnormalities in amino acid and lipid metabolism were improved by BS012 in correlation with its anti-inflammatory properties and normalization of energy metabolism. Additionally, the differentiated cell model revealed that N-isobutyl-dodecatetraenamide is an active component that contributes to the anti-allergic properties of BS012. The current findings demonstrate the anti-allergic and respiratory protective functions of BS012 against allergic asthma, which can be considered a therapeutic candidate.
9.Comparative Evaluation of Osseointegration Parameters between Titanium and Zirconia Implants Placed in Beagle Dogs
Kihyun KIM ; Jun-Beom LEE ; Nguyen Pham-Hanh LUONG ; In-Sung Luke YEO ; Yang-Jo SEOL
Journal of implantology and applied sciences 2024;28(3):134-141
Purpose:
Endosseous titanium dental implants are widely regarded as the gold standard for replacing missing teeth. Despite the proven osseointegration of titanium implants, particularly those with enhanced surface modifications, concerns remain regarding esthetics, the risk of peri-implantitis, and potential hypersensitivity. Consequently, alternative materials, such as zirconia, have received increasing attention in recent years. This study evaluated the osseointegration parameters of zirconia implants placed in the mandibles of beagle dogs, as a preliminary in vivo evaluation of zirconia dental implants in South Korea.
Materials and Methods:
Seven 8-month-old beagle dogs underwent premolar extraction followed by placement of implants in the healed mandibular ridges. The following implants were used in this study: six turned-surface titanium implants, six rough-surface titanium implants, and six zirconia implants, following which the implants and surrounding tissues were harvested en bloc for histological analyses. Bone-to-implant contact (BIC) and new bone area (BA) percentages (%) were calculated and compared between the groups. Statistical analyses were conducted using ANOVA, with the significance level set at p < .05.
Results:
Histological analysis revealed no statistically significant difference in BIC between the rough-surface titanium and zirconia implants, although the turned-surface titanium implants exhibited significantly lower BIC than the other two groups (p < .05). No significant differences were found among the three groups in terms of BA.
Conclusion
The results of this study demonstrate that zirconia implants achieve BIC comparable to that of rough-surface titanium implants, suggestive of their potential clinical application.
10.Smart Device-Assisted Visually Guided Smile Design:A Case Report
Sung-Jin KIM ; In-Sung Luke YEO ; Jae-Hyun LEE
Journal of Korean Dental Science 2024;17(4):221-227
Smile design has transitioned from traditional analog methods to modern digital techniques. This case report presents a smile design technique using a digital workflow facilitated by an application on smart devices as a reference. This approach enables real-time chairside modifications, incorporating the patient’s preferences. Furthermore, it improves communication among the patient, clinician, and dental technician, providing an efficient solution for prosthetic rehabilitation.

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