Propionibacterium acnes (痤瘡丙酸桿菌),Cutibacterium acnes (瘡皰表皮桿菌)-BioVector NTCC典型培養(yǎng)物保藏中心
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Propionibacterium acnes (痤瘡丙酸桿菌), 最近被重新命名為 Cutibacterium acnes (瘡皰表皮桿菌), 是一種常見(jiàn)的皮膚共生細(xì)菌。該細(xì)菌擁有不同的菌株 (也稱為系統(tǒng)發(fā)育型, phylotypes 或核糖型, ribotypes)，這些菌株與皮膚健康或疾?。ㄈ琊畀彛┯兄煌年P(guān)聯(lián)。
主要菌株類型及其關(guān)聯(lián)
痤瘡丙酸桿菌 菌株主要分為三種主要類型（I、II 和 III 型），其中 I 型又細(xì)分為 IA1、IA2、IB 和 IC 等亞型。
系統(tǒng)發(fā)育型/核糖型 | 關(guān)聯(lián)性 | 主要特征和相關(guān)因素 |
|---|---|---|
| I 型 (如 IA1, IC) | 與痤瘡密切相關(guān)。 | 誘導(dǎo)較高水平的促炎細(xì)胞因子 (如 IL-1β、IL-6) 和卟啉產(chǎn)生。這些菌株可能具有特定的基因特征，增強(qiáng)其毒力和在宿主細(xì)胞上的粘附性。許多抗生素耐藥菌株屬于此類。在中國(guó)痤瘡患者中，IA1是主要的流行類型。 |
| II 型 | 與健康皮膚密切相關(guān)。 | 誘導(dǎo)較高水平的抗炎細(xì)胞因子 IL-10。通常具有完整的 CRISPR/Cas 系統(tǒng)，這可能限制它們獲得潛在的毒力因子。雖然主要與健康皮膚相關(guān)，但在中國(guó)的某些研究中，II 型菌株也被發(fā)現(xiàn)與痤瘡相關(guān)聯(lián)。 |
| III 型 | 通常呈中性或與非痤瘡性疾病/健康相關(guān)。 | 在痤瘡皮損中從未被發(fā)現(xiàn)，但與進(jìn)行性黃斑黑色素減退癥等其他病癥有關(guān)聯(lián)。 |
| IB 型 | 分布相對(duì)平衡，在健康和痤瘡皮膚上均有發(fā)現(xiàn)。 |
重要意義
并非所有的痤瘡丙酸桿菌菌株都會(huì)導(dǎo)致痤瘡。了解不同菌株的特性有助于解釋為什么這種細(xì)菌既存在于健康人身上，也存在于痤瘡患者身上。與痤瘡相關(guān)的菌株似乎能促進(jìn)導(dǎo)致炎癥性痤瘡的炎癥反應(yīng)，而健康相關(guān)的菌株可能在維持皮膚微生態(tài)平衡中發(fā)揮保護(hù)作用。這種菌株層面的差異對(duì)于開(kāi)發(fā)更具針對(duì)性的新型痤瘡療法（例如使用有益菌株的益生菌或針對(duì)有害菌株毒力因子的疫苗）至關(guān)重要。
NTCC? Propionibacterium acnes (recently renamed Cutibacterium acnes) is a common skin bacterium with diverse strains (also called phylotypes, ribotypes, or clonal complexes) that have distinct associations with health and disease. Some strains are linked to acne, while others are typically found on healthy skin and may even offer a protective effect.
Key Strain Types and Their Associations
Based on extensive genomic and population studies, P. acnes strains are primarily classified into three major types (I, II, and III), with type I further divided into sub-clades (IA1, IA2, IB, IC).
Phylotype/Ribotype | Association | Key Characteristics and Associated Factors |
|---|---|---|
| Type IA1, IC (e.g., RT4, RT5, RT8) | Strongly associated with acne. | Induce higher levels of inflammatory cytokines (IL-1β, IL-6, IFN-γ, IL-17) and porphyrins. Often carry specific genetic elements (e.g., a linear plasmid with a "tight adhesion" locus) that may increase virulence and adherence to host cells. Many antibiotic-resistant strains belong to these types. |
| Type II (e.g., RT6) | Strongly associated with healthy skin. | Induce higher levels of the anti-inflammatory cytokine IL-10. Possess an intact CRISPR/Cas system, which provides "immunity" against phages and foreign DNA, limiting the acquisition of potential virulence factors. |
| Type IB, III (e.g., RT1, RT2, RT3) | Generally neutral or associated with non-acne conditions/health. | Found in a more balanced distribution on both acne and healthy skin. Type III strains have never been found in acne lesions but have been linked to other conditions like progressive macular hypomelanosis. |
Significance
The understanding that specific P. acnes strains have different properties helps explain why the bacterium is found on both healthy individuals and acne patients. The "acne-associated" strains seem to promote the inflammatory responses that lead to acne lesions, while "health-associated" strains may have a protective role in maintaining skin balance. This strain-level difference is crucial for developing novel, more targeted acne therapies, such as probiotics using beneficial strains or vaccines targeting specific virulence factors of harmful strains.
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