At present, obesity, as a part of metabolic syndrome, represents the leading factor for disability, and is correlated with higher inflammation status, morbidity, and mortality. The purpose of our study is to add new insights to the present body of knowledge regarding the correlations between chronic systemic inflammation and severe obesity, which cannot be treated without considering other metabolic syndrome conditions. Biomarkers of high-level chronic inflammation are recognized as important predictors of pro-inflammatory disease. Besides the well-known pro-inflammatory cytokines, such as WBCs (white blood cells), IL-1 (interleukin-1), IL-6 (interleukin-6), TNF-alpha (tumor necrosis factor-alpha), and hsCRP (high-sensitivity C-reactive protein), as well as anti-inflammatory markers, such as adiponectin and systemic inflammation, can be determined by a variety of blood tests as a largely available and inexpensive inflammatory biomarker tool. A few parameters, such as the neutrophil-to-lymphocyte ratio; the level of cholesterol 25-hydroxylase, which is part of the macrophage-enriched metabolic network in adipose tissue; or levels of glutamine, an immune–metabolic regulator in white adipose tissue, are markers that link obesity to inflammation. Through this narrative review, we try to emphasize the influence of the weight-loss process in reducing obesity-related pro-inflammatory status and associated comorbidities. All data from the presented studies report positive results following weight-loss procedures while improving overall health, an effect that lasts over time, as far as the existing research data show.

C-reactive protein (CRP) has long been recognized as a biomarker of systemic inflammation and cardiovascular disease (CVD) risk. However, emerging evidence highlights the distinct and potent pro-inflammatory role of its monomeric form (mCRP), which is predominantly tissue-bound and directly implicated in vascular injury and plaque destabilization. This narrative review explores the interactions and overlapping pathways that converge within and modulate CRP, mCRP, the associated pathophysiology of diabetes mellitus, and cardiovascular disease. We examine how mCRP promotes endothelial dysfunction, leukocyte recruitment, platelet activation, and macrophage polarization, thereby contributing to the formation of unstable atherosclerotic plaques. Furthermore, we discuss the critical influence of diabetes in amplifying mCRP’s pathogenic effects through metabolic dysregulation, chronic hyperglycemia, and enhanced formation of advanced glycation end products (AGEs). The synergistic interaction of mCRP with the AGE-receptor for AGE (RAGE) axis exacerbates oxidative stress and vascular inflammation, accelerating atherosclerosis progression and increasing cardiovascular risk in diabetic patients. Understanding these mechanistic pathways implicates mCRP as both a biomarker and therapeutic target, particularly in the context of diabetes-associated CVD. This review highlights the need for further research into targeted interventions that disrupt the mCRP-[AGE-RAGE] inflammatory cycle to reduce plaque instability and improve cardiovascular outcomes in high-risk populations.

Systemic inflammation plays a pivotal role in the progression of rheumatoid arthritis (RA) and its associated comorbidities, ranging from cardiovascular (CV) disease to neurodegenerative conditions such as Alzheimer’s disease (AD). This narrative review examines the molecular cross-talk linking these pathologies, with a specific focus on the distinction between pentameric C-reactive protein (pCRP) and its proinflammatory monomeric form (mCRP). We discuss evidence suggesting that mCRP is not merely a passive marker but also an active driver of endothelial dysfunction, atherosclerosis, and synovial inflammation. This review further explores the connections among inflammatory biomarkers, blood vessel integrity, and neurodegeneration, detailing how persistent cytokine elevation (IL-6, TNF-α) and vascular injury contribute to cerebral small vessel disease (cSVD) and cognitive decline, with neurofilament light chain (NfL) serving as a key biomarker of neuroaxonal injury. Additionally, we address the neurobiology of pain in RA, highlighting the mechanisms of central sensitization (CS) and neuroimmune signalling that sustain pain-independent joint swelling. This evidence indicates that understanding the dynamic connection between CRP isoforms and neuronal markers should offer new insights for risk stratification and suggests that targeting mCRP may provide a novel therapeutic avenue to mitigate both articular and extra-articular manifestations of RA.