What is the clinical evidence from this study?

Study design: Case Report. Population: Falsely elevated B-type natriuretic peptide (n=1). Intervention: Purified mouse IgG. Primary outcome: BNP level normalization.

What does this research mean for the field?

Human anti-mouse antibody (HAMA) interference can cause falsely elevated B-type natriuretic peptide (BNP) levels, which can be systematically identified and resolved using a stepwise diagnostic workflow. Novelty: ClaimNovelty.METHODOLOGICAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To examine the impact of human anti-mouse antibodies on B-type natriuretic peptide measurements in a patient with elevated levels and incongruent clinical presentation.

June 7, 2026Annals of Clinical Biochemistry International Journal of Laboratory Medicine

Systematic identification of human anti-mouse antibody interference causing falsely elevated B-type natriuretic peptide: A case study

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Key result

Adding purified mouse IgG normalizes falsely elevated BNP, confirming human anti-mouse antibody interference.

Why the study?

BNP immunoassays are vulnerable to heterophilic antibody interference that can cause false-positive elevations and clinical mismanagement, accounting for unexplained biomarker elevations.

Does a systematic laboratory investigation identify and correct falsely elevated BNP due to HAMA interference?

Key Points

To examine the impact of human anti-mouse antibodies on B-type natriuretic peptide measurements in a patient with elevated levels and incongruent clinical presentation.
Conducted serial dilution to observe non-linear recovery of BNP levels.
Performed cross-platform comparison showing normal BNP results on an alternative platform.
Used heterophilic blocking reagents, confirming interference with purified mouse IgG.
Initial BNP level measured at 2735.7 ± 54.3 pg/mL, inconsistent with clinical status.
Addition of purified mouse IgG normalized BNP levels in a dose-dependent manner.
Demonstrated potential for human anti-mouse antibody interference to cause false-positive BNP results.

Study Design

Type

Case Report (n=1)

Structured PICO

Does a systematic laboratory investigation identify and correct falsely elevated BNP due to HAMA interference?

Population

A 36-year-old female with a markedly elevated BNP incongruent with her clinical presentation.

Exposure

Stepwise laboratory investigation including serial dilution, cross-platform comparison, heterophilic blocking reagent treatment, and addition of purified mouse IgG

Outcome

Identification and correction of falsely elevated BNP levelssurrogate

A systematic laboratory workflow can identify and correct falsely elevated BNP levels caused by human anti-mouse antibody interference, preventing unnecessary clinical interventions.

Discussion

No takes yet. Share an insight, caveat, or question.

Implication

Suggests evaluating for HAMA in unexplained BNP elevations; confirms interference mechanism but leaves prevalence and impact open.

Cite This Study

Li et al. (2026) conducted a case report in Falsely elevated B-type natriuretic peptide (n=1). Purified mouse IgG was evaluated on BNP level normalization. Addition of purified mouse IgG normalized the falsely elevated BNP level (2735.7 ± 54.3 pg/mL) in a dose-dependent manner, confirming human anti-mouse antibody interference.

synapsesocial.com/papers/6a250baa7def13d035e1ba37 https://doi.org/10.1177/00045632261458983

Topics

HFrEF treatment Heart failure

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Systematic identification of human anti-mouse antibody interference causing falsely elevated B-type natriuretic peptide: A case study

Key Points

Study Design

Structured PICO

Discussion

Implication

Cite This Study

Topics

Systematic identification of human anti-mouse antibody interference causing falsely elevated B-type natriuretic peptide: A case study

Key Points

Study Design

Structured PICO

Discussion

Implication

Cite This Study

Also Consider

Topics

Also Consider