Geng Investigation Report: Effects of IFN-γ on Smad7 and Type IV Collagen mRNA Expression in Renal Tissue of Glomerulonephritis Rats (DOI: 10.13312/j.issn.1671-7783.2011.02.013)

Academic fraud report · Geng Detector

Summary

Verdict: Highly suspicious. The paper by Jiang Lin et al., published in the Journal of Jiangsu University (Medical Edition) in 2011, presents multiple internal inconsistencies that cannot be reconciled. The most serious concern is a fatal methodology–statistics conflict: the methods state that data are expressed as mean ± SD and analyzed by t-test, yet Figures 3 and 4 (Northern blot results) appear to show only a single lane per experimental group (control, ATS 3d, ATS 5d, IFN-γ 3d, IFN-γ 5d), which is incompatible with independent biological replicates required for SD and t-tests. Second, sample sizes are unusually small (control n=4; IFN-γ and ATS groups n=10 each, split across two time points) while reporting multiple P<0.01 findings, raising concerns about fabricated or heavily manipulated statistics. Third, Reference [2] cites page range 263–472 for a single paper, which is implausible for a standard journal article and suggests a fabricated citation. Image-level analysis could not be performed because the figures are not available in the extracted text. Confidence is moderate-to-high for the methodology and citation issues; image-based conclusions could not be reached.

Verdict

🟠 Highly suspicious. The paper exhibits unresolved internal contradictions between reported methods and presented data, combined with at least one reference that appears fabricated. These issues are consistent with patterns frequently seen in problematic publications, but final adjudication requires institutional investigation.

Key findings

Fatal methodology–statistics conflict (Finding 1): Methods specify mean ± SD and t-test using SPSS 13.0, yet Figures 3 and 4 (Northern blot) display only a single lane per group (control; ATS 3d; ATS 5d; IFN-γ 3d; IFN-γ 5d). A mean ± SD and t-test cannot be derived from n=1 per group without pooling samples, which itself precludes standard deviation calculation. This is a classic red flag for "single-experiment-passed-off-as-replicates."
Suspiciously small sample sizes with high-significance results (Finding 2): 24 rats were allocated as IFN-γ n=10, ATS n=10, control n=4. With two time points (3 d, 5 d), per-group n drops further (≈5 at each time point, with control n=4 split across time points). Multiple P<0.01 differences under these conditions suggest possible data manipulation or fabrication of P values.
Implausible reference page range (Finding 3): Reference [2] — Yan X, Liu Z, Chen Y. Regulation of TGF-beta signaling by Smad7[J]. Acta Biochim Biophys, 2011, 41(4): 263–472 — cites a single article spanning 263–472 (~210 pages), which is not credible for a standard journal paper and suggests a fabricated or machine-generated reference.
Image-level analysis not feasible (Finding 4): Figures 1 and 2 are noted as "see inside back cover" (封三), and Figures 3 and 4 are not available in the extracted text. Pixel-level inspection (image reuse, splicing) therefore could not be performed.

Evidence highlights

Methods section quote: "所有数据以均数±标准差（x±s）表示，用SPSS13.0软件包对数据进行标准差计算和t检验"
Figure 3 and Figure 4 legends list only 5 lanes (1: normal control; 2: ATS 3d; 3: ATS 5d; 4: IFN-γ 3d; 5: IFN-γ 5d)
Group allocation: IFN-γ group 10 rats; ATS model group 10 rats; normal control 4 rats; total 24
Reference [2] page range: 263–472 in Acta Biochim Biophys 2011;41(4)
DOI: 10.13312/j.issn.1671-7783.2011.02.013

Notes

Confidence is high for Findings 1, 2, and 3 based on the internal text alone.
Finding 4 is explicitly marked "insufficient basis"; no image-fraud claim is made here.
The recommended next steps in the original report include requesting original Northern blot images and SPSS data from the corresponding author and posting the concerns on PubPeer. No formal journal or institutional complaint has yet been filed in this report.
All numeric evidence (page range, group sizes, P-value thresholds) is preserved as written in the source report and has not been altered.
This is an AI-assisted translation/summary of a Geng fraud-detection report intended for academic integrity discussion; final determination requires official institutional investigation.