Subtopic Deep Dive

PTX3 in Innate Immunity
Research Guide

What is PTX3 in Innate Immunity?

PTX3 is a long pentraxin acting as a humoral pattern recognition molecule in innate immunity, recognizing pathogens, activating complement, and facilitating leukocyte recruitment.

PTX3 binds microbes like Aspergillus fumigatus and localizes in neutrophil extracellular traps (Jaillon et al., 2007, 530 citations). It promotes opsonic activity via complement and Fcγ receptors (Moalli et al., 2010, 202 citations). Over 10 papers from the list detail its structure, multimer formation, and roles in infections (Bottazzi et al., 1997, 380 citations).

Curated Papers

Key Challenges

Why It Matters

PTX3 deficiency impairs resistance to fungal infections like Aspergillus fumigatus, highlighting its nonredundant role in humoral innate immunity (Moalli et al., 2010). Elevated PTX3 levels serve as a biomarker for unstable angina pectoris, enabling early cardiovascular risk detection (Inoue et al., 2006, 235 citations). In infections, PTX3 organizes immune responses by regulating leukocyte recruitment at inflammation sites (Deban et al., 2010, 414 citations), supporting targeted therapies against pathogens.

Key Research Challenges

PTX3-Pathogen Specificity

PTX3 shows selective recognition of certain pathogens like Aspergillus but not others, limiting broad antimicrobial applications. Moalli et al. (2010) demonstrated opsonic activity via complement against fungi requires specific interactions. Understanding binding selectivity remains unresolved (Garlanda et al., 2018).

PTX3 Regulation Mechanisms

Storage in neutrophil granules and release into traps needs precise regulatory controls for timely innate responses (Jaillon et al., 2007). Toll-like receptor-induced production varies by cell type, complicating therapeutic modulation. Deban et al. (2010) linked it to leukocyte recruitment but mechanisms in diverse infections are unclear.

PTX3 Biomarker Validation

Plasma PTX3 levels correlate with unstable angina but require high-sensitivity assays for clinical use (Inoue et al., 2006). Variability in inflammatory contexts like atherosclerosis challenges specificity (Norata et al., 2009). Validation across patient cohorts lacks standardization.

Essential Papers

The humoral pattern recognition receptor PTX3 is stored in neutrophil granules and localizes in extracellular traps

Sébastien Jaillon, Giuseppe Peri, Yves Delneste et al. · 2007 · The Journal of Experimental Medicine · 530 citations

The long pentraxin (PTX) 3 is produced by macrophages and myeloid dendritic cells in response to Toll-like receptor agonists and represents a nonredundant component of humoral innate immunity again...

PTX3 plays a key role in the organization of the cumulus oophorus extracellular matrix and in in vivo fertilization

Antonietta Salustri, Cecília Garlanda, Emilio Hirsch et al. · 2004 · Development · 440 citations

PTX3 is a prototypic long pentraxin that plays a non-redundant role in innate immunity against selected pathogens and in female fertility. Here, we report that the infertility of Ptx3–/– mice is as...

Regulation of leukocyte recruitment by the long pentraxin PTX3

Livija Deban, Remo Castro Russo, Marina Sironi et al. · 2010 · Nature Immunology · 414 citations

Multimer Formation and Ligand Recognition by the Long Pentraxin PTX3

Barbara Bottazzi, Valérie Vouret‐Craviari, Antonio Bastone et al. · 1997 · Journal of Biological Chemistry · 380 citations

PTX3 is a prototypic long pentraxin consisting of a C-terminal 203-amino acid pentraxin-like domain coupled with an N-terminal 178-amino acid unrelated portion. The present study was designed to ch...

Deficiency of the Long Pentraxin PTX3 Promotes Vascular Inflammation and Atherosclerosis

Giuseppe Danilo Norata, Patrizia Marchesi, Vivek Krishna Pulakazhi Venu et al. · 2009 · Circulation · 275 citations

Background— Immune responses participate in several phases of atherosclerosis; there is, in fact, increasing evidence that both adaptive immunity and innate immunity tightly regulate atherogenesis....

Pentraxins: Structure, Function, and Role in Inflammation

Terry W. Du Clos · 2013 · ISRN Inflammation · 245 citations

The pentraxins are an ancient family of proteins with a unique architecture found as far back in evolution as the Horseshoe crab. In humans the two members of this family are C-reactive protein and...

Establishment of a High Sensitivity Plasma Assay for Human Pentraxin3 as a Marker for Unstable Angina Pectoris

Kenji Inoue, Akira Sugiyama, Patrick Reid et al. · 2006 · Arteriosclerosis Thrombosis and Vascular Biology · 235 citations

Objective— Plasma pentraxin 3 (PTX3) levels are increased in patients with acute myocardial infarction, yet its involvement in unstable angina pectoris (UAP) remains unclear. To critically evaluate...

Reading Guide

Foundational Papers

Start with Jaillon et al. (2007, 530 citations) for PTX3 in neutrophils and traps; Deban et al. (2010, 414 citations) for leukocyte recruitment; Bottazzi et al. (1997, 380 citations) for multimer structure, establishing core innate immunity functions.

Recent Advances

Garlanda et al. (2018, 196 citations) reviews PTX3 in infections and repair; Pathak and Agrawal (2019, 232 citations) contextualizes pentraxin evolution.

Core Methods

Neutrophil granule isolation and extracellular trap assays (Jaillon et al., 2007); complement opsonization and Fcγ receptor studies (Moalli et al., 2010); high-sensitivity plasma ELISA for biomarkers (Inoue et al., 2006).

How PapersFlow Helps You Research PTX3 in Innate Immunity

Discover & Search

Research Agent uses searchPapers and exaSearch to find PTX3 papers like 'Role of complement and Fcγ receptors in the protective activity of the long pentraxin PTX3 against Aspergillus fumigatus' by Moalli et al. (2010). citationGraph reveals connections from Jaillon et al. (2007, 530 citations) to Deban et al. (2010), while findSimilarPapers expands to related pentraxin immunity works.

Analyze & Verify

Analysis Agent applies readPaperContent to extract PTX3 binding data from Bottazzi et al. (1997), then verifyResponse with CoVe checks claims against Jaillon et al. (2007). runPythonAnalysis performs statistical verification on citation networks or PTX3 level correlations from Inoue et al. (2006), with GRADE grading for evidence strength in infection models.

Synthesize & Write

Synthesis Agent detects gaps in PTX3 regulation from Garlanda et al. (2018) vs. Moalli et al. (2010), flagging contradictions in pathogen specificity. Writing Agent uses latexEditText, latexSyncCitations for PTX3 review drafts, latexCompile for publication-ready PDFs, and exportMermaid for innate immunity pathway diagrams.

Use Cases

"Analyze PTX3 expression data correlations in infection models from recent papers"

Research Agent → searchPapers → Analysis Agent → runPythonAnalysis (pandas on extracted datasets from Jaillon et al. 2007) → matplotlib plots of PTX3 levels vs. pathogen load.

"Draft a LaTeX review on PTX3 in Aspergillus immunity with citations"

Synthesis Agent → gap detection → Writing Agent → latexEditText → latexSyncCitations (Moalli et al. 2010, Deban et al. 2010) → latexCompile → formatted PDF review.

"Find code for PTX3 protein structure modeling from papers"

Research Agent → paperExtractUrls → Code Discovery → paperFindGithubRepo → githubRepoInspect → Python scripts for pentraxin multimer simulations from Bottazzi et al. 1997 methods.

Automated Workflows

Deep Research workflow conducts systematic review of 50+ PTX3 papers via searchPapers → citationGraph → structured report on innate immunity roles (Jaillon et al. 2007). DeepScan applies 7-step analysis with CoVe checkpoints to verify PTX3 opsonic claims (Moalli et al. 2010). Theorizer generates hypotheses on PTX3-complement interactions from Garlanda et al. (2018).

Try Doxa for PTX3 in Innate Immunity Research

Frequently Asked Questions

What defines PTX3 in innate immunity?

PTX3 is a long pentraxin stored in neutrophil granules, recognizing pathogens and localizing in extracellular traps (Jaillon et al., 2007).

What are key methods studying PTX3 function?

Mouse knockout models reveal PTX3's nonredundant role in infections (Moalli et al., 2010); multimer assays characterize ligand binding (Bottazzi et al., 1997).

What are foundational PTX3 papers?

Jaillon et al. (2007, 530 citations) on neutrophil storage; Deban et al. (2010, 414 citations) on leukocyte recruitment; Bottazzi et al. (1997, 380 citations) on structure.

What open problems exist in PTX3 research?

Pathogen-specific recognition mechanisms and regulatory controls in diverse infections remain unresolved (Garlanda et al., 2018); biomarker validation needs cohort standardization (Inoue et al., 2006).