The biochemistry of melanogenesis: an insight into the function and mechanism of melanogenesis-related proteins

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28 10月 2025

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Author : 伤口世界

The biochemistry of melanogenesis: an insight into the function and mechanism of melanogenesis-related proteins

This article is excerpted from the 《Frontiers in Molecular Biosciences》 by Wound World

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伤口世界

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Gestational diabetes severity stratification during pregnancy: role of plasma oleic acid as a possible early marker
Glial fibrillary acidic protein: a potential biomarker for small fiber neuropathy?
Research progress on risk prediction models for the diabetic foot
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Gestational diabetes severity stratification during pregnancy: role of plasma oleic acid as a possible early marker 2026-05-26 00:00

Chiara M. Soldavini1 · Gabriele Piuri1 · Paola A. Corsetto2 · Irma Colombo2 · Veronica Resi3 · Stefania Zava2 · Gabriele Rossi1 · Enrico Ferrazzi1,4 · Angela M. Rizzo2

Received: 27 December 2024 / Accepted: 2 March 2025 / Published online: 1 April 2025 © The Author(s) 2025

Abstract

Normal pregnancy is characterized by changes in lipid metabolism with significant implications for the health of both mother and offspring. When these changes develop into maternal dyslipidemia, a significant association with adverse pregnancy outcomes has been observed, including the development of gestational diabetes (GD), modulation of the inflam-matory response, and excessive fetal growth. In the present study, we performed a lipidomic assessment of patients at GD diagnosis (24–28 weeks of gestation) and 12 weeks after diagnosis. We found higher levels of esterified oleic acid in plasma at the time of GD diagnosis in women who subsequently required pharmacological therapy to control blood glu-cose levels compared to those who did not require additional treatment, suggesting that the measurement of plasma oleic acid might be an additional tool for the early identification of patients with a more severe form of gestational diabetes. Moreover, plasma oleic acid levels showed a positive correlation with fetal growth in the context of adequate glycemic control, supporting a metabolic dysregulation of other pathways whose identification could help clinicians to discriminate different cases within the spectrum of severity of the disease. Finally, the correlation between plasma oleic acid and circu-lating BAFF levels at the time of diagnosis and 12 weeks later adds a possible mechanism to support the pro-inflammatory and pro-diabetic state in the metabolic set of GD. Overall, these findings strongly support the role of plasma oleic acid as a possible early marker for GD severity stratification during pregnancy.

Keywords Gestational diabetes · Lipidomics · Oleic acid · Fatty acid · Pregnancy inflammation · Biomarker
Glial fibrillary acidic protein: a potential biomarker for small fiber neuropathy? 2026-05-25 00:00

Claus Vinter Bødker Hviid1,2 · Nicklas Højgaard-Hessellund Rasmussen2,3 · Johan Røikjer2,3,4

Received: 5 December 2024 / Accepted: 22 March 2025 / Published online: 7 April 2025© The Author(s) 2025

Abstract

Background Objective and easily applicable biomarkers for diabetic polyneuropathy (DPN) are warranted. Circulating nerve-specific proteins have emerged as valuable biomarkers for central nervous system disease but few of these have been tested in peripheral neuropathy. Glial Fibrillary Acidic Protein (GFAP) is highly expressed in non-myelinating Schwann cells while UCH-L1 is a neuron expressed stress protein not previous analyzed in DPN. In this pilot study, we explore serum GFAP and UCH-L1 levels in patients with/without DPN and controls.

Methods Persons with DPN (n=28), without DPN (n=31), and controls (n=30) were evaluated in a cross-sectional design. Sural nerve conduction (velocity and amplitude) was evaluated by NC-stat DPNCheck™ and quantitative sensory testing of cold detection and pain was performed. GFAP and UCH-L1 levels were compared across study groups and the unadjusted correlation with nerve assessments evaluated.

Results Serum GFAP were lower in persons with DPN (20.9±10.9 pg/ml) than in persons without DPN (26.2±14.1 pg/ ml) (p=0.04) or controls (31.7±26.0 pg/ml) (p=0.02). GFAP levels were not different in persons without DPN and controls (p=0.61). UCH-L1 levels were not different between study groups (p=0.48). GFAP levels correlated with cold pain thresh-old (Rho= − 0.320, p=0.02) but failed to reach significance for cold detection (Rho= − 0.236, p=0.09). No correlation was observed between GFAP and nerve amplitude (p=0.58) or conductivity (p=0.86).

Conclusion Serum GFAP levels are reduced in persons with DPN compared to persons without DPN and controls. Reduced serum GFAP levels may be associated with reduced markers of small nerve fiber damage obtained from quantitative sensory testing in people with diabetes.

Keywords Diabetic polyneuropathy · Diabetes · Biomarkers · Glial fibrillary acidic protein · Quantitative sensory testing
Research progress on risk prediction models for the diabetic foot 2026-05-23 00:00

Haixia Qi1 · Tao Zhang2 · Lijie Hou3 · Qi LI4 · Ruiping Huang3 · Lihua Ma1,3

Received: 23 December 2024 / Accepted: 29 March 2025 / Published online: 19 April 2025 © The Author(s) 2025, corrected publication 2025

Abstract

Objective This study aimed to comprehensively review the latest advancements in diabetic foot risk prediction models over the past four years to address the severe challenges posed by diabetic foot ulcers, which are among the leading causes of disability and mortality among diabetic patients. Diabetic foot ulcers are characterized by their complex aetiology, pose a grave threat to life and impose enormous social and economic burdens, thus becoming a critical issue in public health that urgently requires attention. By accurately predicting the risk of diabetic foot and implementing early intervention strategies, this study aimed to reduce its incidence and mortality rates.

Methods This study employed a systematic review and comprehensive analysis framework, conducted extensive searches of electronic databases (including PubMed, EMBASE, the Cochrane Library, CNKI, etc.) and supplemented these searches with manual literature collection to ensure comprehensive information coverage. During the literature screening and evalua-tion phase, strict adherence to the predetermined inclusion and exclusion criteria was maintained to guarantee the high qual-ity of the included studies. Further detailed quality assessments, data extraction, and analysis of the selected literature were conducted, with a focus on exploring the construction strategies of risk prediction models, the selection of key variables, the evaluation indicators of model performance, and the validation methods.

Results By comparing and analysing the differences among studies in terms of methodology, model effectiveness, and prac-tical application potential, this study summarized the development trends of diabetic foot risk prediction models and antici-pated future research directions. These findings indicate that with the assistance of advanced diabetic foot risk prediction models, potential risk factors can be identified and addressed early on, thereby effectively reducing the incidence of diabetic foot and significantly improving patients’ quality of life.

Conclusion This study revealed that diabetic foot risk prediction models have significant effects on accurately identifying risk factors and guiding early interventions, serving as effective tools to reduce the incidence of diabetic foot. Through early identification and intervention, the prognosis and quality of life of patients can be significantly improved, providing impor-tant references and guidance for the field of public health.

Keywords Diabetic foot ulcer · High-risk diabetic foot · Diabetes · Prediction model

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主任医师、教授、博导，南方医科大学第三附属医院（广东省骨科医院）院长

The biochemistry of melanogenesis: an insight into the function and mechanism of melanogenesis-related proteins

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主任医师、教授、博导，南方医科大学第三附属医院（广东省骨科医院）院长

The biochemistry of melanogenesis: an insight into the function and mechanism of melanogenesis-related proteins

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