• Title/Summary/Keyword: Immune System

Search Result 1,931, Processing Time 0.027 seconds

An Autonomous Traveling Control of Crane Using Humoral Immune Algorithm (생체면역알고리즘을 이용한 크레인의 자율주행 제어에 관한 연구)

  • Lee, K.S.;Lee, Y.J.
    • Journal of Power System Engineering
    • /
    • v.10 no.3
    • /
    • pp.88-96
    • /
    • 2006
  • While the crane system operate in port, one of main objective is to transport containers to the goal position as soon as possible. Because this is one of the biggest problem in terms of productivity of port, the container crane is operated by an expert operator until now. However recently an automatic control system with high performance is required to improve the performance of the crane system and to make high productivity. Therefore we developed an optimal controller based on Humoral Immune Algorithm with PID controller. The proposed system has a real time structure and can improve the performance such as anti-sway problem. Some computer simulations are implemented to assess the characteristics of the proposed controller.

  • PDF

Immune Enhancement Effects of Codium fragile Anionic Macromolecules Combined with Red Ginseng Extract in Immune-Suppressed Mice

  • Kim, Ji Eun;Monmai, Chaiwat;Rod-in, Weerawan;Jang, A-yeong;You, Sang-Guan;Lee, Sang-min;Park, Woo Jung
    • Journal of Microbiology and Biotechnology
    • /
    • v.29 no.9
    • /
    • pp.1361-1368
    • /
    • 2019
  • Codium fragile is an edible seaweed in Asian countries that has been used as a thrombolytic, anticoagulant, antioxidant, anti-inflammatory, and immune-stimulatory agent. Ginseng has also been known to maintain immune homeostasis and to regulate the immune system via enhancing resistance to diseases and microorganisms. In this study, anionic macromolecules extracted from C. fragile (CFAM) were orally administered with red ginseng extract (100 mg/kg body weight) to cyclophosphamide-induced immunosuppressed male BALB/c mice to investigate the immune-enhancing cooperative effect of Codium fragile and red ginseng. Our results showed that supplementing CFAM with red ginseng extract significantly increased spleen index, T- and B-cell proliferation, NK cell activity, and splenic lymphocyte immune-associated gene expression compared to those with red ginseng alone, even though a high concentration of CFAM with red ginseng decreased immune biomarkers. These results suggest that CFAM can be used as a co-stimulant to enhance health and immunity in immunosuppressed conditions.

The therapeutic potential of immune cell-derived exosomes as an alternative to adoptive cell transfer

  • Hong, Yeonsun;Kim, In-San
    • BMB Reports
    • /
    • v.55 no.1
    • /
    • pp.39-47
    • /
    • 2022
  • Adoptive cell transfer (ACT), a form of cell-based immunotherapy that eliminates cancer by restoring and strengthening the body's immune system, has revolutionized cancer treatment. ACT entails intravenous transfer of either tumor-resident or peripheral blood-modified immune cells into cancer patients to mediate anti-tumor response. Although these immune cells control and eradicate cancer via enhanced cytotoxicity against specific tumor antigens, several side effects have been frequently reported in clinical trials. Recently, exosomes, potential cell-free therapeutics, have emerged as an alternative to cell-based immunotherapies, due to their higher stability under same storage condition, lower risk of GvHD and CRS, and higher resistance to immunosuppressive tumor microenvironment. Exosomes, which are nano-sized lipid vesicles, are secreted by living cells, including immune cells. Exosomes contain proteins, lipids, and nucleic acids, and the functional role of each exosome is determined by the specific cargo derived from parental cells. Exosomes derived from cytotoxic effectors including T cells and NK cells exert anti-tumor effects via proteins such as granzyme B and FasL. In this mini-review, we describe the current understanding of the ACT and immune cell-derived exosomes and discuss the limitations of ACT and the opportunities for immune cell-derived exosomes as immune therapies.

Advancements of Common Gamma-Chain Family Cytokines in Cancer Immunotherapy

  • Alexandra A. Wolfarth;Swati Dhar;Jack B. Goon;Ugonna I. Ezeanya;Sara Ferrando-Martínez;Byung Ha Lee
    • IMMUNE NETWORK
    • /
    • v.22 no.1
    • /
    • pp.5.1-5.22
    • /
    • 2022
  • The approval of immunotherapies such as checkpoint inhibitors (CPIs), adoptive cell therapies and cancer vaccines has revolutionized the way cancer treatment is approached. While immunotherapies have improved clinical outcome in a variety of tumor types, some cancers have proven harder to combat using single agents, underscoring the need for multi-targeted immunotherapy approaches. Efficacy of CPIs and cancer vaccines requires patients to have a competent immune system with adequate cell numbers while the efficacy of adoptive cellular therapy is limited by the expansion and persistence of cells after infusion. A promising strategy to overcome these challenges is combination treatment with common gamma-chain cytokines. Gamma-chain cytokines play a critical role in the survival, proliferation, differentiation and function of multiple immune cell types, including CD8 T-cells and NK cells, which are at the center of the anti-tumor response. While the short halflife of recombinant cytokines initially limited their application in the clinic, advancements in protein engineering have led to the development of several next-generation drug candidates with dramatically increased half-life and bioactivity. When combining these cytokines with other immunotherapies, strong evidence of synergy has been observed in preclinical and clinical cancer settings. This promising data has led to the initiation of 70 ongoing clinical trials including IL-2, IL-7, IL-15 and IL-21. This review summarizes the recent advancements of common gamma-chain cytokines and their potential as a cancer immunotherapy.

Infection and Innate Immunityi (감염과 선천면역)

  • Oh, Moo-Young
    • Clinical and Experimental Pediatrics
    • /
    • v.48 no.11
    • /
    • pp.1153-1161
    • /
    • 2005
  • As known by other name(natural immunity), the innate immune system comprises all those mechanisms for dealing with infection that are constitutive or built in, changing little with age or with experience of infection. Though in some ways less sophisticated than adaptive immunity, innate immunity should not belittled, since it has evidently protected thousands of species of invertebrates sufficiently to survive for up to 2 billion years. In the innate immune system, molecules of both cellular and humoral types are involved, corresponding to the need to recognize and dispose of different types of pathogen, to promote inflammatory responses and to interact to the adaptive immune system. A major features of innate immunity are the presence of the normal gut flora, complements, macrophages, dendritic cells, natural killer cells and many cytokines that can block the establishment of infection. Both phagocytic cells and complement system have tremendous potential for damaging host cells, but fortunately they are normally only triggered by foreign materials, and usually most of their destructive effects are focussed on the surface of these or in the safe environment of the phagolysosome. This article addreses the comprehensive mechanisms of the major components of the innate immune system to prevent the infection.

The study on the multizone modeling for preventing transmission of air borne contagion (실내 미생물오염 전파방지를 위한 멀티죤 모델링에 관한 연구)

  • Choi, Sang-Gon;Lee, Hyun-Woo;Hong, Jin-Kwan
    • Proceedings of the SAREK Conference
    • /
    • 2006.06a
    • /
    • pp.429-435
    • /
    • 2006
  • In this study multi-zone modeling program CONTAM 2.4 which is developed by NIST is used for modeling the air disinfection system which is consist of dilution, filtration, ultra violet germicidal irradiation (UVGI) for removing the indoor microorganism such as bacteria and fungus. Developed models those protect occupants against indoor microorganism generated in our daily life are enable to use for immune building simulation tool. Also, results indicate that those models are enable to compute the real situation that is almost impossible of carrying out experiment and identify the disinfection rate with highly reliance. Results also suggest that engineers will use these models as a design tool for the immune building system.

  • PDF

Intrusion Detection Algorithm based on Artificial Immune System

  • Yang, Jae-Won;Sim, Kwee-Bo;Lee, Dong-Wook;Seo, Dong-Il
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 2002.10a
    • /
    • pp.35.4-35
    • /
    • 2002
  • $\textbullet$ Intrusion Detection Algorithm based on Artificial Immune System 1. Introduction 2. Research Background 3. The adaptation algorithm of SYN flooding attack 4. SIMULATION 5. Conclusion 6. References

  • PDF

Recent advance in primary immune deficiency disorders (일차성 면역결핍질환의 최신 지견)

  • Kang, Hyoung-Jin;Shin, Hee Young;Ahn, Hyo Seop
    • Clinical and Experimental Pediatrics
    • /
    • v.52 no.6
    • /
    • pp.649-654
    • /
    • 2009
  • The immune system is comprised of cells and molecules whose collective and coordinated response to the introduction of foreign substance is referred to as the immune response. Defense against microbes is mediated by the early reaction (innate immunity) and the late response (adaptive immunity). Innate immunity consists of the epithelial barrier, phagocytes, complement and natural killer cells. Adaptive immunity, a more complex defense reaction, consists of activation of later-developed lymphocytes that, when stimulated by exposure to infectious agents, increase in magnitude and defensive capabilities with each successive exposure. In this review we discuss recent advances in important primary immune deficiency disorders of innate immunity (chronic granulomatous disease, leukocyte adhesion deficiency) and adaptive immunity (severe combined immune deficiency, Wiskott- Aldrich syndrome).

Autonomous Mobile Robots Navigation Using Artificial Immune Networks and Neural Networks (인공 면역망과 신경회로망을 이용한 자율이동로봇 주행)

  • 이동제;김인식;이민중;최영규
    • The Transactions of the Korean Institute of Electrical Engineers D
    • /
    • v.52 no.8
    • /
    • pp.471-481
    • /
    • 2003
  • The acts of biological immune system are similar to the navigation for autonomous mobile robots under dynamically changing environments. In recent years, many researchers have studied navigation algorithms using artificial immune networks. Conventional artificial immune algorithms consist of an obstacle-avoidance behavior and a goal-reaching behavior. To select a proper action, the navigation algorithm should combine the obstacle-avoidance behavior with the goal-reaching behavior. In this paper, the neural network is employed to combine the behaviors. The neural network is trained with the surrounding information. the outputs of the neural network are proper combinational weights of the behaviors in real-time. Also, a velocity control algorithm is constructed with the artificial immune network. Through a simulation study and experimental results for a autonomous mobile robot, we have shown the validity of the proposed navigation algorithm.

IL-17 and IL-21: Their Immunobiology and Therapeutic Potentials

  • Choong-Hyun Koh;Byung-Seok Kim;Chang-Yuil Kang;Yeonseok Chung;Hyungseok Seo
    • IMMUNE NETWORK
    • /
    • v.24 no.1
    • /
    • pp.2.1-2.24
    • /
    • 2024
  • Studies over the last 2 decades have identified IL-17 and IL-21 as key cytokines in the modulation of a wide range of immune responses. IL-17 serves as a critical defender against bacterial and fungal pathogens, while maintaining symbiotic relationships with commensal microbiota. However, alterations in its levels can lead to chronic inflammation and autoimmunity. IL-21, on the other hand, bridges the adaptive and innate immune responses, and its imbalance is implicated in autoimmune diseases and cancer, highlighting its important role in both health and disease. Delving into the intricacies of these cytokines not only opens new avenues for understanding the immune system, but also promises innovative advances in the development of therapeutic strategies for numerous diseases. In this review, we will discuss an updated view of the immunobiology and therapeutic potential of IL-17 and IL-21.