1.ONE HEATLH: The need for a robust framework
International e-Journal of Science, Medicine and Education 2024;18(1):2-7
One Health approach emphasises the interconnection between human, animal, and environmental health, advocating for a collaborative and multidisciplinary strategy to address global health challenges. In the wake of the COVID-19 pandemic, the importance of such an integrated approach has never been clearer. We explore how the One Health framework can enhance our preparedness for future pandemics. In addition to roles of surveillance, early detection, policy development, we highlight the impact of noncommunicable diseases and economy addressing future pandemics. We conclude that integrating advanced technologies, enhancing surveillance systems, and fostering inter-disciplinary collaboration between private and public, national and international, are essential to ensuring resilient, sustainable and equitable health system
2.The Evolution of Flow-Diverting Stents for Cerebral Aneurysms; Historical Review, Modern Application, Complications, and Future Direction
Dong-Seong SHIN ; Christopher P. CARROLL ; Mohammed ELGHAREEB ; Brian L. HOH ; Bum-Tae KIM
Journal of Korean Neurosurgical Society 2020;63(2):137-152
In spite of the developing endovascular era, large (15–25 mm) and giant (>25 mm) wide-neck cerebral aneurysms remained technically challenging. Intracranial flow-diverting stents (FDS) were developed to address these challenges by targeting aneurysm hemodynamics to promote aneurysm occlusion. In 2011, the first FDS approved for use in the United States market. Shortly thereafter, the Pipeline of Uncoilable or Failed Aneurysms (PUFS) study was published demonstrating high efficacy and a similar complication profile to other intracranial stents. The initial FDA instructions for use (IFU) limited its use to patients 22 years old or older with wide-necked large or giant aneurysms of the internal carotid artery (ICA) from the petrous segment to superior hypophyseal artery/ophthalmic segment. Expanded IFU was tested in the Prospective Study on Embolization of Intracranial Aneurysms with PipelineTM Embolization Device (PREMIER) trial. With further post-approval clinical data, the United States FDA expanded the IFU to include patients with small or medium, wide-necked saccular or fusiform aneurysms from the petrous ICA to the ICA terminus. However, IFU is more restrictive in South Korea than in United States. Several systematic reviews and meta-analyses have sought to evaluate the overall efficacy of FDS for the treatment of cerebral aneurysms and consistently identify FDS as an effective technique for the treatment of aneurysms broadly with complication rates similar to other traditional techniques. A growing body of literature has demonstrated high efficacy of FDS for small aneurysms; distal artery aneurysms; non-saccular aneurysms posterior circulation aneurysms and complication rates similar to traditional techniques. In the short interval since the Pipeline Embolization Device was first introduced, FDS has been firmly entrenched as a powerful tool in the endovascular armamentarium. As new FDS are developed, established FDS are refined, and delivery systems are improved the uses for FDS will only expand further. Researchers continue to work to optimize the mechanical characteristics of the FDS themselves, aiming to optimize deploy ability and efficacy. With expanded use for small to medium aneurysms and posterior circulation aneurysms, FDS technology is firmly entrenched as a powerful tool to treat challenging aneurysms, both primarily and as an adjunct to coil embolization. With the aforementioned advances, the ease of FDS deployment will improve and complication rates will be further minimized. This will only further establish FDS deployment as a key strategy in the treatment of cerebral aneurysms.
3.Hepatitis B virus infection: Epidemiology and seroprevalence rate amongst Negrito tribe in Malaysia
Noraziah Sahlan ; Fadzilah Mohd Nor ; Azdayanti Muslim ; Syahrul Azlin Shaari ; Thuhairah Hasrah Abdul Rahman ; Hoh Boon Peng
The Medical Journal of Malaysia 2019;74(4):320-325
Introduction: Prevalence of Hepatitis B virus (HBV) infection
among the non-indigenous people in Malaysia has been well
established and range between 3% and 5%. However, data
from the indigenous (Orang Asli) people is still lacking. The
Negrito population is the most remotely located Orang Asli
tribe with limited access to health care facilities. This study
was undertaken to determine the epidemiology and
seroprevalence of HBV infection among the Negrito.
Methods: Surveys were conducted in five Negrito
settlements in Kelantan and Perak states in Malaysia. A total
of 150 participants were recruited. Clinical history was taken
and physical examination was performed. Five millilitres of
whole blood were collected and tested for hepatitis B
surface antigen (HBsAg) using electrochemiluminescence
immunoassay.
Results: Participants were mainly from the Bateq (49.3%)
and Mendriq (29.4%) sub-tribes. Overall, 13 subjects (8.7 %);
nine males and four females were HBsAg positive. Nine of
the HBsAg positive subjects were ≥35 years old. All of them
had history of home deliver without evidence of antenatal
record. Six (46%) of the HBsAg positive subjects had tattoo
and body piercing in the past.
Conclusion: The prevalence of HBV infection rate amongst
the Negrito tribe is almost three-fold compared to the
national rates. The reason for this finding remains unclear.
Tattooing, body piercing and vertical transmission could be
the main possible routes of transmission of HBV among the
Negrito population in Malaysia.
4.Patterns of rpoC Mutations in Drug-Resistant Mycobacterium tuberculosis Isolated from Patients in South Korea.
Yeo Jun YUN ; Jong Seok LEE ; Je Chul YOO ; Eunjin CHO ; Dahee PARK ; Yoon Hoh KOOK ; Keun Hwa LEE
Tuberculosis and Respiratory Diseases 2018;81(3):222-227
BACKGROUND: Rifampicin (RFP) is one of the principal first-line drugs used in combination chemotherapies against Mycobacterium tuberculosis, and its use has greatly shortened the duration of chemotherapy for the successful treatment of drug-susceptible tuberculosis. Compensatory mutations have been identified in rpoC that restore the fitness of RFP-resistant M. tuberculosis strains with mutations in rpoB. To investigate rpoC mutation patterns, we analyzed 93 clinical M. tuberculosis isolates from patients in South Korea. METHODS: Drug-resistant mycobacterial isolates were cultured to determine their susceptibility to anti-tubercular agents. Mutations in rpoC were identified by sequencing and compared with the relevant wild-type DNA sequence. RESULTS: In total, 93 M. tuberculosis clinical isolates were successfully cultured and tested for drug susceptibilities. They included 75 drug-resistant tuberculosis species, of which 66 were RFP-resistant strains. rpoC mutations were found in 24 of the 66 RFP-resistant isolates (36.4%). Fifteen different types of mutations, including single mutations (22/24, 91.7%) and multiple mutations (2/24, 8.3%), were identified, and 12 of these mutations are reported for the first time in this study. The most frequent mutation involved a substitution at codon 452 (nt 1356) resulting in amino acid change F452L. CONCLUSION: Fifteen different types of mutations were identified and were predominantly single-nucleotide substitutions (91.7%). Mutations were found only in dual isoniazid- and RFP-resistant isolates of M. tuberculosis. No mutations were identified in any of the drug-susceptible strains.
Base Sequence
;
Codon
;
Drug Resistance, Multiple
;
Drug Therapy
;
Drug Therapy, Combination
;
Humans
;
Korea*
;
Mycobacterium tuberculosis*
;
Mycobacterium*
;
Rifampin
;
Tuberculosis
;
Tuberculosis, Multidrug-Resistant
5.Positive Effect of Baby-Friendly Hospital Initiatives on Improving Mothers' Intention for Successful Breastfeeding in Korea.
Hyun Woo PARK ; Keun Ho RYU ; Yongjun PIAO ; Peipei LI ; Jae Shik HONG ; Hee Bum KIM ; Hwanwook CHUNG ; Jeong Kyu HOH ; Yong Joo KIM
Journal of Korean Medical Science 2018;33(43):e272-
BACKGROUND: In Korea, the breastfeeding (BF) rate of infants aged 6 months or more is drastically decreasing, and this phenomenon is particularly worrisome for the future health of the population. The present study aimed to identify an antenatal strategy for initiation and continuation of human BF, and to identify how Baby-Friendly Hospitals (BFHs) may positively influence the intention to breastfeed. METHODS: A total of 414 pregnant Korean antenatal women were surveyed using questionnaires to determine current knowledge of the benefits of human breast milk, whether they planned to breastfeed after delivery, to continue BF after reinstatement in the workforce, are willing to abide by rooming-in care for infants, and plan to give birth at BFHs. RESULTS: We found that planning room-in care, greater awareness of BF benefits for infant and mother, participation in antenatal education programs, and provision of BF facilities in the workplace were positively associated with plans for exclusive breastfeeding (EBF) and longer BF duration. The mothers who planned to give birth at BFHs also desired to breastfeed immediately after birth, implement in-room care, continue BF at their workplace, participate in antenatal BF educational programs, and were more aware of the benefits of BF. CONCLUSION: If the beneficial effects of BFHs were well known to individuals, these would enhance the success rate of BF in Korea. Antenatal education and consequent acquisition of better knowledge of the benefits of BF are important for increasing the rate of BF practices.
Breast Feeding*
;
Female
;
Humans
;
Infant
;
Intention*
;
Korea*
;
Milk, Human
;
Mothers
;
Parturition
;
Prenatal Education
;
Rooming-in Care
6.Comparison of Wearable Activity Tracker with Actigraphy for Sleep Evaluation and Circadian Rest-Activity Rhythm Measurement in Healthy Young Adults.
Hyun Ah LEE ; Heon Jeong LEE ; Joung Ho MOON ; Taek LEE ; Min Gwan KIM ; Hoh IN ; Chul Hyun CHO ; Leen KIM
Psychiatry Investigation 2017;14(2):179-185
OBJECTIVE: The purpose of this study was to evaluate the applicability of data obtained from a wearable activity tracker (Fitbit Charge HR) to medical research. This was performed by comparing the wearable activity tracker (Fitbit Charge HR) with actigraphy (Actiwatch 2) for sleep evaluation and circadian rest-activity rhythm measurement. METHODS: Sixteen healthy young adults (female participants, 62.5%; mean age, 22.8 years) wore the Fitbit Charge HR and the Actiwatch 2 on the same wrist; a sleep log was recorded over a 14-day period. We compared the sleep variables and circadian rest-activity rhythm measures with Wilcoxon signed-rank tests and Spearman's correlations. RESULTS: The periods and acrophases of the circadian rest-activity rhythms and the sleep start times did not differ and correlated significantly between the Fitbit Charge HR and the Actiwatch 2. The Fitbit Charge HR tended to overestimate the sleep durations compared with the Actiwatch 2. However, the sleep durations showed high correlation between the two devices for all days. CONCLUSION: We found that the Fitbit Charge HR showed high accuracy in sleep evaluation and circadian rest-activity rhythm measurement when compared with actigraphy for healthy young adults. The results suggest that the Fitbit Charge HR could be applicable on medical research as an alternative tool to actigraphy for sleep evaluation and measurement of the circadian rest-activity rhythm.
Actigraphy*
;
Humans
;
Wrist
;
Young Adult*
7.Viridicatol from Marine-derived Fungal Strain Penicillium sp. SF-5295 Exerts Anti-inflammatory Effects through Inhibiting NF-kappaB Signaling Pathway on Lipopolysaccharide-induced RAW264.7 and BV2 Cells.
Wonmin KO ; Jae Hak SOHN ; Youn Chul KIM ; Hyuncheol OH
Natural Product Sciences 2015;21(4):240-247
Viridicatol (1) has previously been isolated from the extract of the marine-derived fungus Penicillium sp. SF-5295. In the course of further biological evaluation of this quinolone alkaloid, anti-inflammatory effect of 1 in RAW264.7 and BV2 cells stimulated with lipopolysaccharide (LPS) was observed. In this study, our data indicated that 1 suppressed the expression of well-known pro-inflammatory mediators such as inducible nitric oxide synthase (iNOS) and cyclooxygenase (COX)-2, and consequently inhibited the production of iNOS-derived nitric oxide (NO) and COX-2-derived prostaglandin E2 (PGE2) in LPS stimulated RAW264.7 and BV2 cells. Compound 1 also reduced mRNA expression of pro-inflammatory cytokines such as interleukin-1beta (IL-1beta), interleukin-6 (IL-6), and tumor necrosis factor-alpha (TNF-alpha). In the further evaluation of the mechanisms of these anti-inflammatory effects, 1 was shown to inhibit nuclear factor-kappa B (NF-kappaB) pathway in LPS-stimulated RAW264.7 and BV2 cells. Compound 1 blocked the phosphorylation and degradation of inhibitor kappa B (IkappaB)-alpha in the cytoplasm, and suppressed the translocation of NF-kappaB p65 and p50 heterodimer in nucleus. In addition, viridicatol (1) attenuated the DNA-binding activity of NF-kappaB in LPS-stimulated RAW264.7 and BV2 cells.
Cytokines
;
Cytoplasm
;
Dinoprostone
;
Fungi
;
Interleukin-1beta
;
Interleukin-6
;
NF-kappa B*
;
Nitric Oxide
;
Nitric Oxide Synthase Type II
;
Penicillium*
;
Phosphorylation
;
Prostaglandin-Endoperoxide Synthases
;
RNA, Messenger
;
Tumor Necrosis Factor-alpha
8.KHG26792 Inhibits Melanin Synthesis in Mel-Ab Cells and a Skin Equivalent Model.
Hailan LI ; Jandi KIM ; Hoh Gyu HAHN ; Jun YUN ; Hyo Soon JEONG ; Hye Young YUN ; Kwang Jin BAEK ; Nyoun Soo KWON ; Young Sil MIN ; Kyoung Chan PARK ; Dong Seok KIM
The Korean Journal of Physiology and Pharmacology 2014;18(3):249-254
The purpose of this study is to characterize the effects of KHG26792 (3-(naphthalen-2-yl(propoxy) methyl)azetidine hydrochloride), a potential skin whitening agent, on melanin synthesis and identify the underlying mechanism of action. Our data showed that KHG26792 significantly reduced melanin synthesis in a dose-dependent manner. Additionally, KHG26792 downregulated microphthalmia-associated transcription factor (MITF) and tyrosinase, the rate-limiting enzyme in melanogenesis, although tyrosinase was not inhibited directly. KHG26792 activated extracellular signal-regulated kinase (ERK), whereas an ERK pathway inhibitor, PD98059, rescued KHG26792-induced hypopigmentation. These results suggest that KHG26792 decreases melanin production via ERK activation. Moreover, the hypopigmentary effects of KHG26792 were confirmed in a pigmented skin equivalent model using Cervi cornus Colla (deer antler glue), in which the color of the pigmented artificial skin became lighter after treatment with KHG26792. In summary, our findings suggest that KHG26792 is a novel skin whitening agent.
Animals
;
Antlers
;
Cornus
;
Hypopigmentation
;
MAP Kinase Signaling System
;
Melanins*
;
Microphthalmia-Associated Transcription Factor
;
Monophenol Monooxygenase
;
Phosphotransferases
;
Skin Lightening Preparations
;
Skin*
;
Skin, Artificial
10.pncA Mutations in the Specimens from Extrapulmonary Tuberculosis.
Jaechun LEE ; Yeo Jun YUN ; Cheah Yoke KQUEEN ; Jong Hoo LEE ; Hee Youn KIM ; Young Ree KIM ; Yoon Hoh KOOK ; Keun Hwa LEE
Tuberculosis and Respiratory Diseases 2012;72(6):475-480
BACKGROUND: Pyrazinamide (PZA) is an effective antitubercular drug that becomes toxic to Mycobacterium tuberculosis when converted to pyrazinoic acid by pyrazinamidase (PZase), encoded by mycobacterial pncA. A strong association was noted between the loss of PZase activity and PZA resistance. The causative organisms in extrapulmonary tuberculosis are rarely cultured and isolated. To detect pncA mutations in specimens from extrapulmonary tuberculosis as confirmative diagnosis of mycobacterial infection and alternative susceptibility test to PZA. METHODS: Specimens were collected from clinically proven extrapulmonary tuberculosis. pncA was sequenced and compared with wild-type pncA. RESULTS: pncA from 30 specimens from 23 donors were successfully amplified (56.6% in specimens, 59% in donors). Six mutations in pncA were detected (20.0% in amplified specimens, 26.1% in specimen donors) at nucleotide positions of 169, 248 and 419. The mutation at position 169 results in substitution of aspartic acid for histidine, a possible allelic variation of M. bovis that have intrinsic PZA resistance. The mutation at position 248 changes proline into arginine and that at position 419, arginine into histidine. CONCLUSION: DNA-based diagnosis using pncA may be simultaneously useful for the early diagnosis of mycobacterial infection and the rapid susceptibility to PZA in extrapulmonary tuberculosis. A potential implication of pncA allelic variation at 169 might be suggested as a rapid diagnostic test for M. bovis infection or Bacille Calmette-Guerin (BCG) reactivation.
Amidohydrolases
;
Antitubercular Agents
;
Arginine
;
Aspartic Acid
;
Diagnostic Tests, Routine
;
Early Diagnosis
;
Histidine
;
Humans
;
Mycobacterium bovis
;
Mycobacterium tuberculosis
;
Proline
;
Pyrazinamide
;
Tissue Donors
;
Tuberculosis


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