• Asian-Australasian Journal of Animal Sciences
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• 제28권9호
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• pp.1354-1361
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• 2015

The complement system is a part of the natural immune regulation mechanism against invading pathogens. Complement activation from three different pathways (classical, lectin, and alternative) leads to the formation of C5-convertase, an enzyme for cleavage of C5 into C5a and C5b, followed by C6, C7, C8, and C9 in membrane attack complex. The C9 is the last complement component of the terminal lytic pathway, which plays an important role in lysis of the target cells depending on its self-polymerization to form transmembrane channels. To address the association of C9 with traits related to disease resistance, the complete porcine C9 cDNA was comparatively sequenced to detect single nucleotide polymorphisms (SNPs) in pigs of the breeds Hampshire (HS), Duroc (DU), Berlin miniature pig (BMP), German Landrace (LR), Pietrain (PIE), and Muong Khuong (Vietnamese potbelly pig). Genotyping was performed in 417 $F_2$ animals of a resource population (DUMI: $DU{\times}BMP$) that were vaccinated with Mycoplasma hyopneumoniae, Aujeszky diseases virus and porcine respiratory and reproductive syndrome virus at 6, 14 and 16 weeks of age, respectively. Two SNPs were detected within the third exon. One of them has an amino acid substitution. The European porcine breeds (LR and PIE) show higher allele frequency of these SNPs than Vietnamese porcine breed (MK). Association of the substitution SNP with hemolytic complement activity indicated statistically significant differences between genotypes in the classical pathway but not in the alternative pathway. The interactions between eight time points of measurement of complement activity before and after vaccinations and genotypes were significantly different. The difference in hemolytic complement activity in the both pathways depends on genotype, kind of vaccine, age and the interaction to the other complement components. These results promote the porcine C9 (pC9) as a candidate gene to improve general animal health in the future.

• Childhood Kidney Diseases
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• 제10권1호
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• pp.45-51
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• 2006

저자들은 C3의 감소와 육안적 혈뇨를 보인 환아에서 현미경적 혈뇨가 지속되면서 8주 후 시행한 검사에서도 C3의 감소가 지속되어 MPGN을 의심하고 신생검 예정이었다. 추적 관찰 중 수막구균 뇌수막염이 동반되었고, C3와 C5의 지속적인 감소와 C7과 C9의 일시적인 감소를 확인하였으며, 신생검에서 1형 MPGN으로 확인되었다. 본 증례의 아쉬운 점은 nephritic factor의 존재나 factor H의 결핍을 입증하여야 하나 아직까지 국내에서는 시행되지 않아 확인은 하지 못하였다. 앞으로 국내에서도 nephritic factor나 다양한 보체계(complement profile)에 대한 검사들이 시행되어야 할 것이다. 이제까지 국내에서는 후기 보체 결핍에 의하여 수막구균 뇌수막의 발생 증례 보고는 2004년 이후 여러 차례 있었지만, MPGN 환자에서 수막구균의 감염은 국내에 보고된 바가 없다. 본 증례를 통해 저보체혈증이 지속되는 일부의 MPGN 환자에서는 수막구균 감염 위험성이 존재하며, nephritic factor 검사와 함께 후기 보체 결핍에 대한 검사가 필요하다고 생각한다. 또한 수막구균성 뇌수막염에 이환된 모든 환자에 대해서 보체 검사를 시행하고 이런 환자에서 주기적인 소변 검사를 통하여 이상이 있을시 MPGN의 가능성을 고려하여 신생검을 고려하여야 할 것이다.

• Journal of Chest Surgery
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• 제32권11호
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• pp.978-983
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• 1999

Background: Complement activation with transpulmonary leukocyte sequestration is considered a main mediator leading to ischemia-reperfusion lung(I-R) injury. We studied the role of leukocytes in the formation of I-R injury in ovine cardiopulmonary bypass(CPB) model with a membrane oxygenator. Material and Method: Five sheep were used. CPB circuitry consisted of a roller pump(American Optical Corp., Greenwich, CT, USA) and a membrane oxygenator(UNIVOX-IC, Bentley, Baxter Health Corp, Irvine, CA, USA). The CPB time was fixed at 120 min. Ten minutes after the start of CPB, total CPB was established. Thereafter a total CPB of 100 min was performed, followed by another 10 min of partial CPB. The CPB was discontinued and the animals were fully recovered. For measuring left and right atrial leukocyte counts, blood samples were taken before thoracotomy, 5 min and 109 in after the start of CPB, and 30 min and 120 min after weaning. C3a was measured before thoracotomy, 109 min after the start of CPB, and 30 min and 120 min after weaning. Plasma malondialdehyde(MDA) was checked before thoracotomy, 109 min after the start of CPB, and 30 min after weaning. One to two grams of lung tissue were taken for water content measurement before thoracotomy, 109 min after the start of CPB, and 30 min after weaning. Lung biopsy specimens were examined by light and electron microscopy. Result: Of 5 animals, 4 survived the experimental procedures. Of these, 3 animals survived on a long-term basis. No significant differences in transpulmonary gradients of leukocyte were found and no significant complement activation was expressed by C3a levels. MDA level did not show significant changes related to lung reperfusion despite an increase after the start of CPB. On both light and electron microscopic examinations, mild to moderate acute lung change was observed. Interstitial edema, leakage of erythrocytes into the alveolar space and endothelial cell swelling were the main findings. Water content of the lung showed a slight increase after the start of CPB, but there was no statistical significance. Conclusion: These findings indicate that ischemia-repersusion lung injury may not be from complement activation-leukocyte sequestration but from another source of oxygen free radicals related to CPB.

• The Korean Journal of Pain
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• 제37권2호
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• pp.91-106
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• 2024

The mechanisms of the chronic pain and depression comorbidity have gained significant attention in recent years. The complement system, widely involved in central nervous system diseases and mediating non-specific immune mechanisms in the body, remains incompletely understood in its involvement in the comorbidity mechanisms of chronic pain and depression. This review aims to consolidate the findings from recent studies on the complement system in chronic pain and depression, proposing that it may serve as a promising shared therapeutic target for both conditions. Complement proteins C1q, C3, C5, as well as their cleavage products C3a and C5a, along with the associated receptors C3aR, CR3, and C5aR, are believed to have significant implications in the comorbid mechanism. The primary potential mechanisms encompass the involvement of the complement cascade C1q/C3-CR3 in the activation of microglia and synaptic pruning in the amygdala and hippocampus, the role of complement cascade C3/C3a-C3aR in the interaction between astrocytes and microglia, leading to synaptic pruning, and the C3a-C3aR axis and C5a-C5aR axis to trigger inflammation within the central nervous system. We focus on studies on the role of the complement system in the comorbid mechanisms of chronic pain and depression.

• 한국농촌건축학회논문집
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• 제6권2호
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• pp.11-20
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• 2004

The rural area is activated and if it does to sleep, that versatility the reading is necessary from the side which is various it sees. Only expansion or improvement of namely base facility it will have and there is not a possibility becoming the basic activation countermeasure. With this with the instance investigation against the traditional market activation which is developed the Gamgok from same background has both the quality of the rural and the city in the center it joins in and the far it will be able to complement a problem point it presents. Also it presents the activation plan which considers the regional quality which from the research which it sees relates with a traditional market to sleep and it does.

• Childhood Kidney Diseases
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• 제21권2호
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• pp.160-164
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• 2017

C3 glomerulopathy (C3G) is a recently defined pathological entity characterized by C3 accumulation with absent or scant immunoglobulin deposition, leading to variable glomerular inflammation. The clinical presentation of patients with C3G is highly variable, as they may present with symptoms ranging from microscopic or mild proteinuria to full-blown nephrotic syndrome, with or without renal impairment. However, there is no consensus recommendation for specific treatment in children with C3G. Recently, new therapies have been suggested to target complement pathways, owing to an improvement in the understanding of the pathogenesis of C3G. C3G complement blockade with eculizumab, a monoclonal antibody targeted against complement C5, inhibits activation of the alternative complement pathway. We could not use eculizumab owing to its high price; thus, we administered oral prednisolone and mycophenolate mofetil (MMF). MMF was replaced with cyclosporine because proteinuria persisted, with a consistently low serum C3 level; we tapered off the prednisolone because of a Cushingoid appearance and amenorrhea. Thereafter, proteinuria improved, and the serum C3 level returned to normal. Thus, we report the effectiveness of cyclosporine in a patient with C3G and an inadequate response to prednisolone and MMF, who was detected via school urinary screening.

• 한국식품과학회지
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• 제34권2호
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• pp.290-295
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• 2002

김치 및 발효유 제품으로부터 분리한 유산균과 공시균주 12종을 대상으로 보체 용혈 분석법을 이용하여 면역계에서 중요한 역할을 담당하고 있는 보체계 활성화(항보체 활성, $TCH_{50}$) 정도를 측정한 결과, 김치로 부터 분리한 Lactobacillus plantarum이 타 유산균 종에 비해 높은 활성을 나타내었다. 이들 균주로 부터 조제된 세포벽 획분의 경우 세포질 획분보다도 높은 활성을 보였으며 각 획분의 활성은 농도 의존적 경향을 나타내었다. L. plantarum의 세포질 획분과 세포벽 획분의 경우 pronase 소화 후에는 활성의 변화가 없는 반면, 과요오드산 처리에 의해서는 급격한 활성의 감소를 나타내는데 이들 결과로부터 L. plantarum의 세포질과 세포벽 획분에 의한 보체계 활성화가 주로 다당 영역에 기인함을 알수 있었다. 한편 anti-human C3를 이용한 2차원 면역전기영동에 의해, $Ca^{++}$ 이온을 제거한 상태에서도 세포질과 세포벽 획분에 의한 C3 활성화 산물을 동정할 수 있었다. 또한 L. plantarum의 세포벽 획분에 의한 항보체 활성은 동일 조건에서 활성을 유지한 반면, 세포질 획분에 의한 활성화 정도는 동일 조건에서 상당히 감소하였다. 이상의 결과로부터 L. plantarum 세포벽 획분의 보체계 활성화 양식은 주로 alternative pathway의 활성화에 의한 것이며, 세포질 획분에 의한 활성화는 classical pathway와 alternative pathway 양 경로를 경유함을 알 수 있었다.

• Clinical and Experimental Pediatrics
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• 제48권1호
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• pp.81-84
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• 2005

Henoch-$Sch{\ddot{o}}nlein$ purpura (HSP)는 피부, 관절, 위장관 그리고 신장을 침범하는 혈관염으로 혈소판 감소증이 없는 자반증을 전형적인 증상으로 하는 질환으로 그 원인에 대하여 여러 가지 가설들이 있지만 아직 확실치 않다. HSP에서 신장 침범은 이차적으로 오는 혈관염으로 임상적으로 혈뇨와 단백뇨의 증상을 보이고 병리학적 소견은 IgA 신염과 매우 유사하다. 그 외에도 HSP 신염은 다양한 형태의 사구체 신염을 보이는데 막성 사구체 신염은 드물다. 이에 저자들은 HSP의 임상 양상을 가지면서 혈청 내 보체의 감소, 단백뇨 및 고혈압을 보이고 조직학적으로 막성 사구체 신염 소견을 보인 6세 환아를 경험하였기에 이를 문헌 고찰과 함께 보고하는 바이다.

• Journal of Preventive Medicine and Public Health
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• 제18권1호
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• pp.91-97
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• 1985

본 연구는 담배가 면역계에 미치는 영향을 탐색하는 일환으로 한국산 각종 담배가 가토보체의 활성에 미치는 영향을 조사하였다. 담배를 veronal buffered saline으로 추출한 후 이를 가토보체와 0.1 : 1의 비율로 혼합한 후 $37^{\circ}C$에서 60분간 반응시켜 반응전후의 보체역가를 보체 용혈검사로 측정하였다. 담배 A 의 경우 60분간 반응후에는 보체역가가 55.92% 감소되었으며 담배 B 는 48.62%, 담배 C 는 42.62%, 담배 D 는 49.12%, 담배 E 는 42.26%, 담배 F 는 53.26%, 담배 G 는 71.96%, 담배 H 는 60.90%, 담배 I 는 61.14% 감소되었다. 한국산 담배 9종 모두가 보체역가를 적게는 42.26% 크게는 71.96% 감소시킨 것으로 보아 담배 모두가 정도의 차이는 있지만 보체를 활성화시켰다.

• Clinical and Experimental Pediatrics
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• 제50권10호
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• pp.931-937
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• 2007

The hemolytic uremic syndrome (HUS) is a rare disease of microangiopathic hemolytic anemia, low platelet count and renal impairment. HUS usually occurs in young children after hemorrhagic colitis by shigatoxin-producing enterohemorrhagic E. coli (D+HUS). HUS is the most common cause of acute renal failure in infants and young children, and is a substantial cause of acute mortality and morbidity; however, renal function recovers in most of them. About 10% of children with HUS do not reveal preceding diarrheal illness, and is referred to as D- HUS or atypical HUS. Atypical HUS comprises a heterogeneous group of thrombomicroangiopathy (TMA) triggered by non-enteric infection, virus, drug, malignancies, transplantation, and other underlying medical condition. Emerging data indicate dysregulation of alternative complement pathway in atypical HUS, and genetic analyses have identified mutations of several regulatory genes; i.e. the fluid phase complement regulator Factor H (CFH), the integral membrane regulator membrane cofactor protein (MCP; CD46) and the serine protease Factor I (IF). The uncontrolled activation of the complement alternative pathway results in the excessive consumption of C3. Plasma exchange or plasma infusion is recommended for treatment of, and has dropped the mortality rate. However, overall prognosis is poor, and many patients succumb to end-stage renal disease. Clinical presentations, response to plasma therapy, and outcome after renal transplantation are influenced by the genotype of the complement regulators. Thrombotic thrombocytopenic purpura (TTP), another type of TMA, occurs mainly in adults as an acquired disease accompanied by fever, neurologic deficits and renal abnormalities. However, less frequent cases of congenital or hereditary TTP associated with ADAMTS-13 (a disintegrin and metalloprotease, with thrombospondin 1-like domains 13) gene mutations have been reported, also. Recent advances in molecular genetics better allow various HUS to be distinguished on the basis of their pathogenesis. The genetic analysis of HUS is important in defining the underlying etiology, predicting the genotype-related outcome and optimizing the management of the patients.