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( Won Chull Bak ),( Ji Heon Park ),( Young Ae Park ),( Kang Hyeon Ka ) 한국균학회 2014 Mycobiology Vol.42 No.3
Shiitake mushrooms (Lentinula edodes) containing β-glucans may be beneficial for human health; they have been used in the treatment of cancer, hypertension, and high cholesterol levels. The objective of this study was to determine the β-glucan content in different sections of the fruiting bodies and mycelia of ten shiitake mushroom cultivars. The measured β-glucan content ranged from 20.06 ± 1.76% to 44.21 ± 0.13% in the pileus sections, and from 29.74 ± 1.40% to 56.47 ± 4.72% in the stipe sections. The results of this study indicate that the variance in β-glucan content dependent on the shiitake cultivar, and that the β-glucan content is higher in the stipe than in the pileus.
( Ka-won Kang ),( Byung-hyun Lee ),( Min Ji Jeon ),( Eun Sang Yu ),( Dae Sik Kim ),( Se Ryeon Lee ),( Hwa Jung Sung ),( Chul Won Choi ),( Yong Park ),( Byung Soo Kim ) 대한내과학회 2021 The Korean Journal of Internal Medicine Vol.36 No.6
Background/Aims: Relatively little data are available on how the response to the coronavirus disease 2019 (COVID-19) pandemic has affected treatment outcomes in patients receiving chemotherapy for lymphoma or multiple myeloma. We aimed to determine the effect of COVID-19 countermeasures on treatment out-comes in this patient population. Methods: We retrospectively analyzed data on patients treated for lymphoma or multiple myeloma in two tertiary hospitals in Seoul. Patients were divided into two groups: group 1 included patients who received chemotherapy between September and December 2019 (the control period), and group 2 included patients who received chemotherapy between September and December 2020 (the study period). Countermeasures to COVID-19 were applied to the patients in group 2. The countermeasures implemented included mask wearing and regular hand-washing at home and in hospital; COVID-19 risk assessments on all hospital visitors; and pre-emptive COVID-19 screening for all newly hospitalized patients and their resident guardians. Results: No differences in treatment outcomes, including treatment response, incidence and duration of neutropenia or neutropenic fever, delays in chemo-therapy, or number of deaths during chemotherapy, were observed between the groups. None of the patients in group 2 tested positive for COVID-19, and there were no COVID-19-related deaths during the study period. Conclusions: Countermeasures to COVID-19 did not affect treatment outcomes in patients receiving chemotherapy for lymphoma or multiple myeloma. Data on the effect of countermeasures to COVID-19 on treatment outcomes should continue to be analyzed to ensure that treatment outcomes are not adversely affected.
( Ka Won Kang ),( Jeong Hyeon Lee ),( Ji Seon Choi ),( Se Ryeon Lee ),( Yong Park ),( Byung Soo Kim ),( Insun Kim ) 대한내과학회 2014 대한내과학회 추계학술발표논문집 Vol.2014 No.1
In patients treated with autologous stem cell transplantation (ASCT), compromised T cell immunity persists for up to 1 year after transplantation, and these patients have an increased chance of developing atypical lymphoid hyperplasia mimicking tumor recurrences. We present a case of cervical lymphadenitis due to cytomegalovirus (CMV) reactivation in a patient who had undergone ASCT for Burkitt lymphoma, which mimicked tumor recurrence on computed tomography and positron emission tomography- computed tomography 6 months after ASCT. This lesion was confined to the regional lymph nodes by histologic examination and was not accompanied by signs of systemic involvement. Localized CMV lymphadenitis was spontaneously resolved without treatment 6 months later and normalization of CMV lgM titer from elevated state was observed 6 months after resolution. This case has several clinical implications. first, it highlights the importance of histologic examination in cases of lesions highly suspected to be tumor recurrence on the basis of imaging findings in patients treated with ASCT. Second, even histologically evident CMV lymphadenitis may not be accompanied by signs of systemic involvement in patients who have undergone ASCT. Of note, localized CMV lymphadenitis in this case was spontaneously resolved without anti-CMV treatment. Because recovery of the depressed CD4+:CD8+ ratio after ASCT requires at least 1 year and because anti-CMV drugs such as ganciclovir and valganciclovir could be toxic to newly engrafted hematopoietic stem cells, cautious follow up without anti-CMV treatment should be considered for up to 1 year after transplantation in cases of post-transplant localized CMV lymphadenitis without systemic involvement in patients with complete engraftment after ASCT. To the best of our knowledge, this is the first report to describe the pathologic findings and clinical course of CMV lymphadenitis without systemic involvement in a patient who had undergone ASCT.
BMB Reports : Targeted disruption of EBNA1 in EBV-infected cells attenuated cell growth
( Ka Won Noh ),( Jihyun Park ),( Myung Soo Kang ) 생화학분자생물학회 2016 BMB Reports Vol.49 No.4
Epstein Barr virus (EBV)-encoded nuclear antigen-1 (EBNA1) plays a pivotal in an EBV episome replication and persistence. Despite considerable attempts, there are no EBV drugs or vaccines. We attempted to eradicate EBV episomes by targeting EBNA1 using the transcription activator-like effector nucleases (TALEN) (E1TN). E1TN-mediated transient knockout (KO) of EBNA1 reduced EBNA1 expression, and caused significant loss of EBV genomes and progressive death of EBV-infected cells. Furthermore, when a mixture of EBV-infected Burkitt`s lymphoma (BL) cells and EBV-negative BL cells was targeted by E1TN, EBV-negative cells were counter-selected while most EBV-infected cells died, further substantiating that EBNA1 KO caused selective death of EBV-infected cells. TALEN-mediated transient targeting of EBNA1 attenuated the growth of EBV-infected cells, implicating a possible therapeutic application of E1TN for EBV-associated disorders. [BMB Reports 2016; 49(4): 226-231]
Kang, Minju,Lim, Ka Ram,Won, Jong Woo,Na, Young Sang Elsevier 2018 JOURNAL OF ALLOYS AND COMPOUNDS Vol.769 No.-
<P><B>Abstract</B></P> <P>The effect of entropy on the strengths of the disordered and ordered phases was investigated. Cost effective AlCo<SUB>x</SUB>CrFeNi (x = 0, 0.25, 0.5, 0.75, and 1) high-entropy alloys were fabricated reducing Co content. The strength was considerably reduced when the Co content was zero. This was attributed to the low hardness of the A2 phase due to reduced configurational entropy compared with quinary system. On the other hand, the ordered B2 phase showed the opposite tendency. This result shows that the configurational entropy causes opposing effects on disordered and ordered phases, and the importance of considering the effect of entropy on each phase when the number of elements changed, and an alloy is composed of two or more phases, in particular, having BCC structure.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Effect of Entropy on the mechanical properties of each phase was studied. </LI> <LI> Considerably lower YS of the AlCrFeNi HEA is due to the low strength of the A2 matrix. </LI> <LI> Configurational entropy causes opposing effects on disordered and ordered phases. </LI> </UL> </P>
Kang, Woon-Seok,Oh, Chung-Sik,Kwon, Won-Kyoung,Rhee, Ka Young,Lee, Yun Gu,Kim, Tae-Hoon,Lee, Suk Ha,Kim, Seong-Hyop by 2016, the American Society of Anesthesiologists 2016 Anesthesiology Vol.125 No.1
<P>Background: The aim of study was to evaluate the effect of mechanical ventilation mode type, pressure-controlled ventilation (PCV), or volume-controlled ventilation (VCV) on intra-and postoperative surgical bleeding in patients undergoing posterior lumbar interbody fusion (PLIF) surgery. Methods: This was a prospective, randomized, single-blinded, and parallel study that included 56 patients undergoing PLIF and who were mechanically ventilated using PCV or VCV. A permuted block randomization was used with a computer-generated list. The hemodynamic and respiratory parameters were measured after anesthesia induction in supine position, 5 min after patients were changed from supine to prone position, at the time of skin closure, and 5 min after the patients were changed from prone to supine position. The amount of intraoperative surgical bleeding, fluid administration, urine output, and transfusion requirement were measured at the end of surgery. The amount of postoperative bleeding and transfusion requirement were recorded every 24 h for 72 h. Results: The primary outcome was the amount of intraoperative surgical bleeding, and 56 patients were analyzed. The amount of intraoperative surgical bleeding was significantly less in the PCV group than that in the VCV group (median, 253.0 [inter-quartile range, 179.0 to 316.5] ml in PCV group vs. 382.5 [328.0 to 489.5] ml in VCV group; P < 0.001). Comparing other parameters between groups, only peak inspiratory pressure at each measurement point in PCV group was significantly lower than that in VCV group. No harmful events were recorded. Conclusion: Intraoperative PCV decreased intraoperative surgical bleeding in patients undergoing PLIF, which may be related to lower intraoperative peak inspiratory pressure.</P>