• Title/Summary/Keyword: Sickle

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Therapeutic efficacy of the photoactivated sickle cells as novel drug delivery vehicle (약물전달 시스템 개발을 위한 여기된 광감응제의 응용)

  • Choe, Se-woon
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2015.10a
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    • pp.958-960
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    • 2015
  • Sickle cells possess a unique combination of traits that may enable their use as models for novel synthetic tumor targeting controlled release drug carriers with the ability to treat disseminated tumors in advanced metastatic disease. In this study, we assess the ability of light-activated release sickle cells to enhance tumor delivery of the fluorescent dye calcein by delayed photolysis controlled release compared to free systemic administration of calcein. Sickle cells from mouse models of the disease were shown to preferentially accumulate in tumors compared to adjacent tissue, in 4T1 tumors in mice on a time scale about 12 hours. Sickle cells photosensitized with protoporphyrin IX achieved delayed release of 50% of contents 8-16 hours after photoactivation, which was deemed useful for in vivo delivery of cargo to tumors given the tumor accumulation time of the sickle cells. Sickle cells may be useful as a model for new synthetic drug carrier particles with delayed photolysis controlled release properties.

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MicroRNAs in Human Diseases: From Lung, Liver and Kidney Diseases to Infectious Disease, Sickle Cell Disease and Endometrium Disease

  • Ha, Tai-You
    • IMMUNE NETWORK
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    • v.11 no.6
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    • pp.309-323
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    • 2011
  • MicroRNAs (miRNAs) are a class of naturally occurring small non-coding RNAs of about 22 nucleotides that have recently emerged as important regulators of gene expression at the posttranscriptional level. Recent studies provided clear evidence that microRNAs are abundant in the lung, liver and kidney and modulate a diverse spectrum of their functions. Moreover, a large number of studies have reported links between alterations of miRNA homeostasis and pathological conditions such as infectious diseases, sickle cell disease and endometrium diseases as well as lung, liver and kidney diseases. As a consequence of extensive participation of miRNAs in normal functions, alteration and/or abnormalities in miRNAs should have importance in human diseases. Beside their important roles in patterning and development, miRNAs also orchestrated responses to pathogen infections. Particularly, emerging evidence indicates that viruses use their own miRNAs to manipulate both cellular and viral gene expression. Furthermore, viral infection can exert a profound impact on the host cellular miRNA expression profile, and several RNA viruses have been reported to interact directly with cellular miRNAs and/or to use these miRNAs to augment their replication potential. Here I briefly summarize the newly discovered roles of miRNAs in various human diseases including infectious diseases, sickle cell disease and enodmetrium diseases as well as lung, liver and kidney diseases.

A Study on Manufacturing Method of iron Sickles Found in Jangjae-ri, Yeongi, Korea (연기 장재리 출토 철겸의 제작방법 연구)

  • Cho, Hyun Kyung;Cho, Nam Chul;Lee, Seon Young
    • Journal of Conservation Science
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    • v.31 no.4
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    • pp.489-497
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    • 2015
  • Iron sickle is tool used in various ways and have various form. It has agricultural feature as well as is used in weapon. Previous studies have been focused on features of farming tools. In this study, metallurgical analysis of iron sickles are introduced because examples of analysis for iron sickles is rare. Two sickles form Yeongi Jangjae-ri are investigated and compared to one sickle of Yeongi Songwon-ri. Three sickles have forging molding process and heat treatment process. No.1 sickle of Jangjae-ri have martensite of quenching. No.2 sickle of Jangjae-ri was undergone high temperature as compared with others. This show manufacturing technology of sickles from Jangjae-ri in over the Songwon-ri's.

Application and therapeutic effects of sickle red blood cells for targeted cancer therapy (표적항암치료를 위한 겸형적혈구의 응용 및 치료 효과)

  • Choe, Se-woon
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.20 no.12
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    • pp.2395-2400
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    • 2016
  • Conventional drug carriers such as liposomes, nanoparticles, polymer micelles, polymeric conjugate and lipid microemulsion for cancer chemotherapy shield normal tissues from toxic drugs to treat cancer cells in tumors. However, inaccurate tumor targeting uncontrolled drug release from the carriers and unwanted accumulation in healthy sites can limit treatment efficacy with current conventional drug carriers with insufficient concentrations of drugs in the tumors and unexpected side effects as a result. Sickle red blood cells show natural tumor preferential accumulation without any manipulation due to the adhesive interaction between molecular receptors on the membrane surface and counter-receptor on endothelial cells. In addition, structural changes of microvascular in tumor sites enhances polymerization of sickle red blood cells. In this research, we examined the use of sickle red blood cells as a new drug carrier with novel tumor targeting and controlled release properties to quantify its therapeutic effects.

Occurrence of Alternaria cassiae in Seeds of Sickle Senna in Korea

  • Hyun, Ik-Hwa;Cho, Hye-Sun;Yu, Seung-Hun
    • Mycobiology
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    • v.29 no.2
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    • pp.104-106
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    • 2001
  • Alternaria cassiae Jurair & Khan was recorded on seeds of sickle senna(Cassia tora L.). Seed infection ranged from $25{\sim}45%$ in two samples. Developing roots and shoots turn brown and died in case of severe infection. Detailed descriptions were given on the habit characters of the fungus and on the morphology of conidiophores and condia. This is the first report of A. cassiae on seeds of Cassia.

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Effectiveness of premarital screening program for thalassemia and sickle cell disorders in Ras Al Khaimah, United Arab Emirates

  • Salama, Rasha Aziz Attia;Saleh, Abeer Kamal
    • Journal of Genetic Medicine
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    • v.13 no.1
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    • pp.26-30
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    • 2016
  • Purpose: Genetic disorders can be prevented by basic public health measures and activities that focus primarily on education and approaches in Primary Health Care. Premarital screening is one such approach that can identify asymptomatic carriers of hemoglobinopathies and provide genetic counseling to couples for a healthy reproductive life. This study aimed to estimate the prevalence of beta thalassemia and sickle cell disorders in the adult population screened as a part of the United Arab Emirates Premarital Screening Program and to measure the effectiveness of the program in decreasing high-risk marriages in Ras Al Khaimah (RAK). Materials and Methods: A retrospective, population-based study was conducted at the RAK Primary Health Care Center, where the National Premarital Screening Program is implemented. The study included data collected from the premarital screening records of all couples who had applied for a marriage license during 2008-2015. Results: Of the 17,826 individuals screened during the studied period, 4.02% (717) were diagnosed as positive for hemoglobinopathies. The prevalence of beta thalassemia and sickle cell disorders among the total study population was 2.98% and 1.05%, respectively. The hemoglobinopathy trait was more prevalent than the disease. Among these 8,913 couples who were issued certificates for compatibility based on screening tests, 28 (0.31%) couples were declared high-risk (unmatched). Seventy percent of these unmatched couples reported consanguineous marriages. Conclusion: The program was successful in achieving its objective of identifying high-risk marriages. In spite of the counseling, however, all of the high-risk couples still married each other.

Free Tissue Transfer in Sickle Cell Disease: A Case Report and Systematic Review

  • Anne Huang;Ronak A. Patel;Lawrence J. Gottlieb
    • Archives of Plastic Surgery
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    • v.50 no.3
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    • pp.315-324
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    • 2023
  • Hemoglobinopathies such as sickle cell disease (SCD) are traditionally considered a relative contraindication to free tissue transfer, due to concerns that erythrocyte sickling will increase the risk of microvascular thrombosis and flap failure. This article describes a case report with the successful use of free tissue transfer in a patient with SCD and provides a systematic literature review on free tissue transfer in SCD. A retrospective chart review was performed of a patient with SCD who underwent free tissue transfer at the authors' institution. A systematic literature review using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines was performed using the keywords "free tissue transfer," "free flap," or "microsurgery" and "sickle cell" on PubMed, Ovid/Medline, and Scopus. A 29-year-old male with delayed presentation of an electrical burn to the face and scalp underwent wound closure with a free anterolateral thigh flap. Key management principles included red blood cell transfusion to keep hemoglobin S under 30% and hemoglobin greater than 10 g/dL, maintenance of hydration, normothermia, adequate analgesia, and postoperative anticoagulation. Systematic literature review identified 7 articles describing 13 cases of free tissue transfer in 10 patients with SCD, with combined complete free flap success in 10 of the 13 flaps. Free tissue transfer can be successfully performed in patients with SCD. However, evidence on the optimal management of this unique patient population in the perioperative period after free tissue transfer is limited to case reports in the literature.

L- Arginine as a dietary supplement and its role in protection from disease and metabolism

  • BEERAM, Eswari
    • The Korean Journal of Food & Health Convergence
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    • v.5 no.4
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    • pp.25-28
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    • 2019
  • Now a days problem in health has become common. So, instead of curing them, prevention through dietary supplements has proven to be useful. In the case of patients who have already developed the disease atleast relieving pain and suffer is a challenging thing. In this context L- arginine is doing better compared to other essential aminoacids up to some extent. Arginine was found to reduce the pain associated with pulmonary hypertension foun to be associated with sickle cell anaemia. It also reduces the reperfusion injury after ischemia, trauma and shock. Some of the drugs with L-arginine as component are under clinical trials and hope to be available in the market soon. Severe preeclampsia is characterised by headaches, blurred vision, and inability to have high photovision, nausea and vomiting. L-Arginine along with Vit C and E are given as medical food to the patients and decrease in condition symptoms is the project now under phase II clinical trial. However the role of arginine in ameolirating preeclampsia symptoms is uncertain except with that of hypertension. Arginine is used to treat pain in sickle cell anaemia, lung damage, reperfusion injury, Trauma and shock but should be excluded during sepsis.