- 产品描述
美国Seracare脑脊髓液质控品(Cerebral Spinal Fluid)
广州健仑生物科技有限公司
广州健仑长期供应各种生物原料,主要代理品牌:美国Seracare、西班牙Certest、美国Fuller等等。
主要产品包括各种标准品、阳性对照品、单克隆抗原抗体。
其中常见的有:弓形虫病、西尼罗河病毒、类风湿因子、疟疾、麻疹、莱姆病、百日咳杆菌、大肠杆菌、鼠伤寒沙门氏菌、李斯特菌等阳性对照品。
美国Seracare脑脊髓液质控品(Cerebral Spinal Fluid)
我司还提供其它进口或国产试剂盒:登革热、疟疾、流感、A链球菌、合胞病毒、腮病毒、乙脑、寨卡、黄热病、基孔肯雅热、克锥虫病、违禁品滥用、肺炎球菌、军团菌、化妆品检测、食品安全检测等试剂盒以及日本生研细菌分型诊断血清、德国SiFin诊断血清、丹麦SSI诊断血清等产品。
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【Seracare产品介绍】
编号 | 英文名称 | 中文名称 |
JL-FA-01 | Amebiasis (AME) | 阿米巴病 |
JL-FA-02 | Allergens, Rast scores | 过敏原,放射性过敏原吸收实验。指对特定的人群引起免疫反应或者过敏反应的食品中的蛋白质 |
JL-FA-03 | Allergens, Rast scores negative | 过敏原,放射性过敏原吸收实验阴性 |
JL-FA-04 | Anti-cyclic citrullinated peptide Antibody (CCP) Arthritis | 抗环瓜氨酸肽抗体 |
JL-FA-05 | ASCA Saccharomyces Cerevi | 人抗酿酒酵母抗体(ASCA) |
JL-FA-06 | Aspergillis | 麴菌病 |
JL-FA-07 | Beta 2 Glycoprotein | β2糖蛋白 |
JL-FA-08 | Beta 2 Glycoprotein IgM | β2糖蛋白 IGM |
JL-FA-09 | Bordela Pertussis | 百日咳杆菌 |
JL-FA-10 | Bordela Pertussis IgM | 百日咳杆菌 IGM |
JL-FA-11 | C-ANCA | C-抗中性粒细胞胞浆抗体(ANCA) |
JL-FA-12 | Cardiolipin | 心肌磷脂 |
JL-FA-13 | Cardiolipin IgA | 心肌磷脂 IGA |
JL-FA-14 | Cardiolipin IgG | 心肌磷脂 IGG |
JL-FA-15 | Cardiolipin IgM | 心肌磷脂 IGM |
JL-FA-16 | Cerebral Spinal Fluid | 脑脊髓液 |
JL-FA-17 | Chagas | 恰加斯病/南美锥虫 |
JL-FA-18 | Chlamydia | 衣原体 |
JL-FA-19 | Chlamydia IgA | 衣原体IGA |
JL-FA-20 | Chlamydia IgG | 衣原体IGG |
JL-FA-21 | Chlamydia IgM | 衣原体IGM |
JL-FA-22 | Chlamydia Neg | 衣原体阴性 |
JL-FA-23 | Clotting Factor C3 | 凝固因子C3 |
JL-FA-24 | Clotting Factor C4 | 凝固因子C4 |
JL-FA-25 | Coccidiodes | 球孢菌 |
JL-FA-26 | Cytomegalovirus (CMV) Neg | 巨细胞病毒抗体阴性 |
JL-FA-27 | CMV IgG | 巨细胞病毒 IGG阳性 |
JL-FA-28 | CMV IgM VCA | 巨细胞病毒 IGM 阳性 |
JL-FA-29 | C-Reactive Protein (CRP) | C-反应蛋白质 |
JL-FA-30 | Dengue Fever | 登革热 |
JL-FA-31 | Dengue Fever IgM | 登革热 IGM |
JL-FA-32 | DS (Double Stranded) DNA | 双链脱氧核糖核酸 |
JL-FA-33 | EBNA (Epstein-Barr nuclear antigen) IgG | EB病毒核抗原 IGG |
JL-FA-34 | EBNA (Epstein-Barr nuclear antigen) IgM | EB病毒核抗原 IGM |
JL-FA-35 | Epstein Barr Virus (EBV) Negative Plasma | EB病毒阴性血浆 |
JL-FA-36 | Epstein Barr Virus (EBV) EA IgM | EB病毒早期抗原 IGM |
JL-FA-37 | Epstein Barr Virus (EBV) VCA IgM | EB病毒壳蛋白 IGM |
JL-FA-38 | Epstein Barr Virus (EBV) EA IgG | EB病毒早期抗原 IGG |
JL-FA-39 | EMA (Endomysial Antibodies) | 肌内膜 |
JL-FA-40 | Gliadin | 麸蛋白,麦醇溶蛋白,麦胶蛋白 |
JL-FA-41 | Gliadin IgG | 麦醇溶蛋白 IGG |
JL-FA-42 | Gliadin IgA | 麦醇溶蛋白 IGA |
JL-FA-43 | Glomerular Basement Membrane (GBMA) | 肾小球基底膜病 |
JL-FA-44 | Helicobacter pylori IgA | 幽门螺旋杆菌IGA |
JL-FA-45 | Helicobacter pylori IgG | 幽门螺旋杆菌IGG |
JL-FA-46 | Helicobacter pylori IgM | 幽门螺旋杆菌IGM |
JL-FA-47 | Helicobacter pylori Negative | 幽门螺旋杆菌阴性 |
JL-FA-48 | Helicobacter pylori Positive Plasma | 幽门螺旋杆菌阴性血浆 |
JL-FA-49 | Hepatitis A Virus (HAV) Pos. Plasma | 甲型肝炎病毒阳性血浆 |
JL-FA-50 | Hepatitis A Virus (HAV) IgM | 甲型肝炎病毒IGM |
JL-FA-51 | Hepatitis B Core (HBc) IgG | 乙型肝炎病毒核心 IGG |
JL-FA-52 | Hepatitis B Core (HBc) IgM | 乙型肝炎病毒核心 IGM |
JL-FA-53 | Anti Hbe (Antibody to HBV antigen) | 乙肝抗体 |
JL-FA-54 | Hepatitis Delta Virus | 丁型肝炎病毒 |
JL-FA-55 | HBeAg (HBV e antigen) | 乙肝 E抗原 |
JL-FA-56 | anti-HBs (HBV surface antibody) | 乙肝表面抗体 |
JL-FA-57 | Hepatitis B (HBsAg) "Chronic" | 乙型肝炎(乙肝表面抗原)“慢性病 |
JL-FA-58 | HBsAg (HBV surface antigen) Serum | 乙肝表面抗原血清 |
JL-FA-59 | HBsAg (AD) | 乙肝表面抗原(AD) |
JL-FA-60 | HBsAg (AY) | 乙肝表面抗原(AY) |
JL-FA-61 | HBV Positive Plasma | 乙肝阳性血浆 |
JL-FA-62 | HBV DNA Plasma | 乙肝DNA血浆 |
JL-FA-63 | HBV DNA Serum | 乙肝DNA血清 |
JL-FA-64 | HBV DNA type A | A型 乙肝DNA |
JL-FA-65 | HBV DNA type B | B型 乙肝DNA |
JL-FA-66 | HBV DNA type C | C型 乙肝DNA |
JL-FA-67 | HBV DNA type D | D型 乙肝DNA |
JL-FA-68 | HBV DNA type E | E型 乙肝DNA |
JL-FA-69 | HBV DNA type F | F型 乙肝DNA |
JL-FA-70 | HBV Antibody HCV Antibody Plasma CO-INFECTED | 乙肝和丙肝联合感染血浆 |
JL-FA-71 | HCV (Hepatitis C Virus) Antibody | 丙型肝炎抗体 |
JL-FA-72 | HCV Core Antigen Positive | 丙肝核心抗原 阳性 |
JL-FA-73 | HCV RNA PLASMA Genotype 1 | 基因1型丙肝RNA 血浆 |
JL-FA-74 | HCV RNA PLASMA Genotype 2 | 基因2型丙肝RNA 血浆 |
JL-FA-75 | HCV RNA PLASMA Genotype 3 | 基因3型丙肝RNA 血浆 |
JL-FA-76 | HCV RNA PLASMA Genotype 4 | 基因4型丙肝RNA 血浆 |
JL-FA-77 | HCV RNA PLASMA Genotype 5 | 基因5型丙肝RNA 血浆 |
JL-FA-78 | HCV RNA PLASMA Genotype 6 | 基因6型丙肝RNA 血浆 |
JL-FA-79 | HCV Riba single band | 丙肝免疫印迹单波段 |
JL-FA-80 | HCV RIBA Pos. (multiple bands) | 丙肝免疫印迹阳性多波段 |
JL-FA-81 | HCV Negative | 丙肝阴性 |
JL-FA-82 | HCV RNA Pos (quantitative) | 丙肝RNA阳性(定量) |
JL-FA-83 | Hepatitis E | 戊型肝炎 |
JL-FA-84 | Herpes Simplex Virus (HSV)1/2 Positive Plasma | 单纯性疱疹病毒1/2阳性血浆 |
JL-FA-85 | Herpes Simplex Virus (HSV) 1 Negative Plasma | 单纯性疱疹病毒1 阴性血浆 |
JL-FA-86 | Herpes Simplex Virus (HSV) 1 IgG | 单纯性疱疹病毒1 IGG |
JL-FA-87 | Herpes Simplex Virus (HSV 1) IgM | 单纯性疱疹病毒1 IGM |
JL-FA-88 | Herpes Simplex Virus (HSV) 2 IgG | 单纯性疱疹病毒2 IGG |
JL-FA-89 | Herpes Simplex Virus (HSV) 2 IgM | 单纯性疱疹病毒2 IGG |
JL-FA-90 | Histone | 组蛋白 |
JL-FA-91 | Human Anti Mouse Ab (HAMA) | 人抗鼠抗体 |
JL-FA-92 | Human immunodeficiency virus (HIV) 1 Neg | HIV I 阴性 |
JL-FA-93 | anti Human immunodeficiency virus (HIV) 1 Plasma | 抗HIV I 血浆 |
JL-FA-94 | anti Human immunodeficiency virus (HIV) 1 Serum | 抗HIV I 血清 |
JL-FA-95 | anti Human immunodeficiency virus (HIV) 2 Western Blot Tested | 抗HIV 2 免疫印迹 |
JL-FA-96 | anti Human immunodeficiency virus (HIV) 1/2 2 HIV (+) | 抗HIV 1/2 2 HIV阳性 |
JL-FA-97 | Human immunodeficiency virus (HIV) Ag | HIV抗原 |
JL-FA-98 | HIV RNA (quantitative) Plasma | HIV RNA 定量血浆 |
JL-FA-99 | HIV RNA (quantitative) Serum | HIV RNA 定量血清 |
JL-FA-100 | HIV1 Subtype A | HIV1 亚型A |
JL-FA-101 | HIV1 Subtype B | HIV1 亚型B |
JL-FA-102 | HIV1 Subtype C | HIV1 亚型C |
JL-FA-103 | HIV1 Subtype D | HIV1 亚型D |
JL-FA-104 | HIV1 Subtype E | HIV1 亚型E |
JL-FA-105 | HIV1 Subtype F | HIV1 亚型F |
JL-FA-106 | HIV1 Subtype G | HIV1 亚型G |
JL-FA-107 | HIV1 Subtype H | HIV1 亚型H |
JL-FA-108 | HIV1 Subtype J | HIV1 亚型J |
JL-FA-109 | HIV1 Subtype K | HIV1 亚型K |
JL-FA-110 | HIV1 Group O | HIV1 亚型O |
JL-FA-111 | Human immunodeficiency virus (HIV) 2 Antibody Plasma | HIV 2 抗体血浆 |
JL-FA-112 | Human immunodeficiency virus (HIV) 2 Antibody Serum | HIV 2 抗体血清 |
JL-FA-113 | HPV (Human Papiloma Virus) Negative | 人乳状瘤病毒HPV阴性 |
JL-FA-114 | HPV (Human Papiloma Virus) Positive | 人乳状瘤病毒HPV阳性 |
JL-FA-115 | Human immunodeficiency virus (HIV) Antibody HCV Antibody Plasma COINFECTED | HIV 抗体 HCV |
JL-FA-116 | Human T-cell Lymphotropic Virus (HTLV) I/II | 人嗜T淋巴细胞病毒(HTLV) I/II |
JL-FA-117 | Human T-cell Lymphotropic Virus (HTLV) I | 人嗜T淋巴细胞病毒(HTLV) I |
JL-FA-118 | Human T-cell Lymphotropic Virus (HTLV) II | 人嗜T淋巴细胞病毒(HTLV) II |
JL-FA-119 | Jo-1 | 多发性肌炎抗原JO-1 |
JL-FA-120 | IgE < 5,000 Ku/L | IgE < 5,000 Ku/L |
JL-FA-121 | Legionella | 军团杆菌属 |
JL-FA-122 | Leptospira | 军团杆菌属 |
JL-FA-123 | Lyme Disease | 莱姆(氏)病:蜱传播的全身性疾病,常在夏季发生 |
JL-FA-124 | Lyme IgG | 莱姆(氏)病 IGG |
JL-FA-125 | Lyme IgM | 莱姆(氏)病 IGM |
JL-FA-126 | Lyme Disease Neg | 莱姆(氏)病 阴性 |
JL-FA-127 | Malaria | 疟疾 |
JL-FA-128 | Mononucleosis (infectious) | 单核细胞增多症(有传染性的) |
JL-FA-129 | Mononucleosis Negative | 单核细胞增多症阴性 |
JL-FA-130 | Measles Negative | 麻疹 阴性 |
JL-FA-131 | Measles IgG | 麻疹 IGG |
JL-FA-132 | Measles IgM | 麻疹 IGM |
JL-FA-133 | Microsomal Anti-thyroid peroxidase antibody (TPO) Positive Plasma Standard Titer (typically 1,000-3,000 IU/mL) | 微粒体抗甲状腺过氧化物酶抗体 |
JL-FA-134 | Microsomal Anti-thyroid peroxidase antibody (TPO) Negative Plasma | 微粒体抗甲状腺过氧化物酶抗体 |
JL-FA-135 | Anti-mitochondrial antibody (AMA) | 抗线粒体抗体 |
JL-FA-136 | Multiple Sclerosis | 多发性硬化症 |
JL-FA-137 | Mumps IgG | 流行性腮腺炎 IGG |
JL-FA-138 | Mumps Ab IgM | 流行性腮腺炎抗体 IGM |
JL-FA-139 | Mumps Antibody Negative Plasma | 流行性腮腺炎抗体阴性血浆 |
JL-FA-140 | Mumps Antibody Negative Serum | 流行性腮腺炎抗体阴性血清 |
JL-FA-141 | Myeloma Plasma | 骨髓瘤血浆 |
JL-FA-142 | Myeloma IgA | 骨髓瘤IGA |
JL-FA-143 | Myeloma IgE | 骨髓瘤IGE |
JL-FA-144 | Myeloma IgG | 骨髓瘤IGG |
JL-FA-145 | Myeloma IgM | 骨髓瘤IGM |
JL-FA-146 | Mycoplasma | 支原体 |
JL-FA-147 | Mycoplasma Negative | 支原体阴性 |
JL-FA-148 | Mycoplasma IgG | 支原体IGG |
JL-FA-149 | Mycoplasma IgM | 支原体IGM |
JL-FA-150 | Mycoplasma PCR | 支原体PCR |
JL-FA-151 | Normal Human Plasma | 正常人血浆 |
JL-FA-152 | Normal Human Serum | 正常人血清 |
JL-FA-153 | Nuclear Antibody Centromere | 核抗体着丝粒 |
JL-FA-154 | Nuclear Antibody, Speckled ANA | 核抗体,斑点抗核抗体 |
JL-FA-155 | Nuclear Antibody, Nucleolar ANA | 核抗体,核仁抗核抗体 |
JL-FA-156 | Nuclear Antibody, Homogeneous ANA | 核抗体,同质抗核抗体 |
JL-FA-157 | Nuclear Antiobody, Speckled. (ANA) Negative | 核抗体,斑点。抗核抗体阴性 |
JL-FA-158 | P-ANCA (associated neutrophil cytoplasmic antibodies) | 相关的嗜中性粒细胞胞浆抗体 |
JL-FA-159 | Parietal Cell Antibody (PCA) | 胃)壁细胞抗体 |
JL-FA-160 | Parvo positive plasma | 细小病毒阳性血浆 |
JL-FA-161 | Parvo IgM | 细小病毒 IGM |
JL-FA-162 | Parvo IgG | 细小病毒 IGG |
JL-FA-163 | Parvo Negative Plasma | 细小病毒阴性血浆 |
JL-FA-164 | Parvo DNA positive | 细小病毒 DNA 阳性 |
JL-FA-165 | Phospholipid Positive Plasma | 磷脂阳性血浆 |
JL-FA-166 | Prothrombin | 凝血酶原,凝血因子 |
JL-FA-167 | Rheumatoid Factor (RF) <1000 IU/mL | 类风湿因子<1000 IU/mL |
JL-FA-168 | Rheumatoid Factor (RF) 1001-2000 IU/mL | 类风湿因子1001-2000 IU/mL |
JL-FA-169 | Rheumatoid Factor (RF) 2001-4000 IU/mL | 类风湿因子 2001-4000 IU/mL |
JL-FA-170 | Rheumatoid Factor (RF) 4001-5000 IU/mL | 类风湿因子 4001-5000 IU/mL |
JL-FA-171 | Rheumatoid Factor (RF) >5000 IU/mL | 类风湿因子>5000 IU/mL |
JL-FA-172 | Ribonucleoprotein (RNP) Positive | 核糖核蛋白阳性 |
JL-FA-173 | Rubella Chimeric | 风疹 |
JL-FA-174 | Rubella Negative | 风疹阴性 |
JL-FA-175 | Rubella IgG | 风疹IGG |
JL-FA-176 | Rubella IgM | 风疹IGM |
JL-FA-177 | Rubeola Negative Plasma | 风疹阴性血浆 |
JL-FA-178 | Rubeola IgG | 风疹IGG |
JL-FA-179 | Scleroderma (Scl-70) Pos | 胶原沉着病,硬皮病,硬皮症 阳性 |
JL-FA-180 | Scleroderma (Scl-70) Negative | 硬皮病阴性 |
JL-FA-181 | Sickle Cell Fresh Whole Blood | 镰刀形红细胞新鲜全血 |
JL-FA-182 | Smith (SM) | 抗Smith抗体阳性血清(SLE的特征性抗体) |
JL-FA-183 | SMITH RNP | 抗RNP抗体阳性血清(SLE的特征性抗体) |
JL-FA-184 | Smooth Muscle (ASMA) | 抗平滑肌抗体阳性血清 |
JL-FA-185 | Sjogren syndrome antigen A (SSA) Positive | 舍格伦综合征或干燥综合征抗原A 阳性 |
JL-FA-186 | Sjogren syndrome antigen B (SSB) Positive | 舍格伦综合征抗原B 阳性 |
JL-FA-187 | Sjogren syndrome antigen B (SSB) Negative | 舍格伦综合征抗原B阴性 |
JL-FA-188 | Streptolysin O Ab (ASO) | 链球菌溶血素O抗体 |
JL-FA-189 | Syphilis (RPR - Rapid Plasma Reagin) Positive Plasma | 梅毒(梅毒-快速血浆反应)阳性血浆 |
JL-FA-190 | Syphilis (RPR - Rapid Plasma Reagin) Negative Plasma | 梅毒(梅毒-快速血浆反应)阴性血浆 |
JL-FA-191 | Syphilis/ATA/T. pallidum IgG | 梅毒ATA/T,苍白球IGG |
JL-FA-192 | Syphilis/ATA/T. pallidum IgM | 梅毒ATA/T,苍白球IGM |
JL-FA-193 | Systemic Lupus Erythematosus (SLE) Positive | 全身性红斑狼疮阳性 |
JL-FA-194 | Systemic Lupus Erythematosus (SLE) Negative | 全身性红斑狼疮阴性 |
JL-FA-195 | TG/TPO Positive (Standard Titer 1,000 - 3000 IU/mL) | 甲状腺球蛋白/甲状腺过氧化物酶阳性 |
JL-FA-196 | TG/TPO Negative | 甲状腺球蛋白/甲状腺过氧化物酶阴性 |
JL-FA-197 | TTG (Tissue Transglutaminase) | 组织转谷氨酰胺酶 |
JL-FA-198 | TTG (Tissue Transglutaminase) IgA | 组织转谷氨酰胺酶 IGA |
JL-FA-199 | ToRCH (Toxo, Rubella, CMV, HSV) Positive | 优生优育(弓形虫,风疹,巨细胞,单胞)阳性 |
JL-FA-200 | ToRCH (Toxo, Rubella, CMV, HSV) Negative | 优生优育(弓形虫,风疹,巨细胞,单胞)阴性 |
JL-FA-201 | Toxoplasmosis (Toxo) | 弓形虫病 |
JL-FA-202 | Toxoplasmosis (Toxo) IgG | 弓形虫病IGG |
JL-FA-203 | Toxoplasmosis (Toxo) IgM | 弓形虫病IGM |
JL-FA-204 | Thyroglobulin (TG) Positive Plasma | 甲状腺球蛋白阳性血浆 |
JL-FA-205 | Thyroglobulin (TG) Negative | 甲状腺球蛋白阴性 |
JL-FA-206 | Varicella-Zoster Virus (VZV) Negative | 水痘-带状疱疹病毒阴性 |
JL-FA-207 | Varicella-Zoster Virus (VZV) IgG | 水痘-带状疱疹病毒IGG |
JL-FA-208 | Varicella-Zoster Virus (VZV) IgM | 水痘-带状疱疹病毒IGM |
JL-FA-209 | West Nile Virus (WNV) | 西尼罗河脑炎病毒 |
JL-FA-210 | West Nile Virus (WNV) IgM | 西尼罗河脑炎病毒IGM |
美国
这项研究由心脏科副教授Reza Ardehali博士和同事进行,解决了zui近关于心脏肌肉是否具有自我再生的力量的争论。该研究结果也对于未来研究心脏组织的再生修复损伤导致疾病或心脏病非常重要。这项研究结果发表于2014年5月29日的《PNAS》杂志上。
zui初人们认为心脏肌肉细胞,或心肌无法自我复制,它们的总数与出生的时候一样。然而,在过去的二十年研究中已表明,这些心肌细胞具有有限的增殖活性,尽管科学界没有明确给出原因以及数量。
在某种程度上,很难找到用来衡量这种潜在的细胞分裂的间接方法,有时这种方法并不准确,难以达成科学共识。有些研究组使用碳年代测定法检测人类心肌细胞的年龄,以确定它们是否为初始胎儿发育后分裂,但这种技术的准确性有争议。其他发表的理论表明,心脏肌肉具有一个非常高的增殖能力; zui近,许多这些论文被撤回,因为同行们无法复制这些数据。
创建一个直接测量的模型
为了解决测量问题,Ardehali和他的同事开创了称为马赛克分析双标记(或MADAM)的新颖遗传方法,*次直接测量小鼠模型的心脏细胞分裂。他们发现心肌细胞分裂是有限的,终身对称的,虽然小鼠中这种明显的现象很少见,但在*个月的生活后显著减小。研究人员说,并没有任何的干细胞参与这一过程,以及心肌细胞的分裂每年仅限于不到1%。
研究人员说,子代的心肌细胞是这种罕见的细胞分裂的产品也能够分裂,这很不平常(以前没有研究发现过这种现象)。科学家发现,细胞分裂的速度并没有随着小鼠心肌梗塞诱导的一个修复反应而提高。
“这是显示心脏再生力量非常有限的zui有说服力的和直接的方式之一,” Ardehali说。 “这是一个非常令人兴奋的发现,因为我们希望利用这些知识zui终能够使心脏组织再生。其目的是确定参与心肌细胞对称分裂的分子途径,以及在疾病或受伤后使用它们来诱导再生补充心脏肌肉组织。”
人类的免疫系统是非常复杂的,它有着大量不同的细胞具有各种各样的功能,这确保侵入的微生物如病毒或细菌能够迅速地使之无害并保持整个机体的健康。
免疫系统还包括自然杀伤细胞(NK细胞),其识别并消除肿瘤或病毒感染的细胞。因此,NK细胞对抗人体自身的应激细胞以防止它们成为一个潜在的危险。然而,这种承担是有风险性的。其他的免疫细胞——特异性杀伤细胞,也被称为CD8 + T细胞,响应于病毒感染时不断地繁殖和变得成熟,也可以表现出应激症状,从而可能终结在NK细胞的名单上。
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【公司名称】 广州健仑生物科技有限公司
【】 杨永汉
【】
【腾讯 】 2042552662
【公司地址】 广州清华科技园创新基地番禺石楼镇创启路63号二期2幢101-3室
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The study, conducted by Dr. Reza Ardehali, an associate professor of cardiology, and colleagues resolved the recent controversy over whether the heart muscle has the power to regenerate itself. The results of this study are also of great importance for future studies on regenerative repair of cardiac tissue leading to disease or heart disease. The study was published in the May 29, 2014 issue of PNAS.
Initially, people thought that heart muscle cells, or myocardium, could not replicate themselves, and their total number was the same as when they were born. However, in the past two decades of studies, it has been shown that these cardiomyocytes have limited proliferative activity despite the fact that the scientific community has not clearly given the reason and the quantity.
To some extent, it is difficult to find an indirect way to measure this potential cell division, which is sometimes not accurate enough to reach a scientific consensus. Some groups use carbon dating to test the age of human cardiomyocytes to determine whether they are post-embryonic developmental fissures, but the accuracy of this technique is controversial. Other published theories show that cardiac muscle has a very high proliferative capacity; recently, many of these papers have been withdrawn because of their inability to replicate these data.
Create a model for direct measurement
In order to solve the measurement problem, Ardehali and his colleagues pioneered a novel genetic approach called mosaic analysis double labeling (or MADAM), the first direct measurement of cardiac cell division in mouse models. They found that cardiomyocyte division was limited and life-long symmetrical, although this notable phenomenon in mice was rare but significantly reduced after the first month of life. The researchers said that no stem cells involved in this process, and myocardial cell division is limited to less than 1% per year.
It is not uncommon for researchers to say that offspring of cardiomyocytes are the rare products of cell division that divide (this has not been done before). Scientists found that the rate of cell division did not increase with a repair response induced by myocardial infarction in mice.
"This is one of the most persuasive and direct ways to show that the power of heart regeneration is very limited," Ardehali said. "This is a very exciting finding because we hope to eventually use this knowledge to regenerate heart tissue and its purpose is to identify the molecular pathways involved in the symmetrical division of cardiomyocytes and their use in the event of illness or injury to induce regenerative heart replenishment Muscle tissue. "
The human immune system is very complex. It has a large number of different cells that have a variety of functions that ensure that invading microbes, such as viruses or bacteria, can quickly be rendered harmless and maintain the health of the entire body.
The immune system also includes natural killer cells (NK cells) that recognize and eliminate tumor or virus-infected cells. Therefore, NK cells fight the body's own stress cells to prevent them from becoming a potential danger. However, this commitment is risky. Other immune cell-specific killer cells, also known as CD8 + T cells, may also display stress symptoms in response to continued multiplication and maturation of the virus infection and may thus end up on the NK cell list .