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In this chapter we outline three distinct quantitative approaches suitable for targeting apolipoproteins (1) multiplex immunoassays, (2) mass spectrometric immunoassay, and (3) multiple reaction monitoring, mass spectrometric quantification. We also discuss management of pre-analytical and experimental design variables.Sarcopenia, the age-dependent decline of muscle mass and performance, is a common condition among elderly population and is related to numerous adverse health outcomes. Due to the effect of sarcopenia on quality of life, disability, and mortality, a greater awareness is important in order to correctly recognize the condition both in community and geriatric settings. Research on sarcopenia prevention and treatment is growing quickly, but many questions are still unanswered. The core of the sarcopenia state includes quantitative and qualitative declines of skeletal muscle. These two aspects should therefore be considered when designing and examining preventive and therapeutic interventions. The role of vitamin D in skeletal muscle metabolism has been highlighted in recent years. The interest arises from the important findings of studies indicating multiple impacts of vitamin D on this tissue, which can be divided into genomic (direct impacts) and non-genomic impacts (indirect impacts). Another important dimension to be considered in the study of vitamin D and muscle fiber metabolism is associated with different expressions of the vitamin D receptor, which differs in muscle tissue, depending on age, gender, and pathology. Vitamin D inadequacy or deficiency is related to muscle fiber atrophy, elevated risk of chronic musculoskeletal pain, sarcopenia, and falls. This review describes the effect of vitamin D in skeletal muscle tissue function and metabolism and includes discussion of possible mechanisms in skeletal muscle.The increase in the human lifespan has not been paralleled by an increase in healthy life. With the increase in the proportion of the aged population, there has been a natural increase in the prevalence of age-related disorders, such as Alzheimer's disease, type 2 diabetes mellitus, frailty, and various other disorders. A continuous rise in these conditions could lead to a widespread medical and social burden. There are now considerable efforts underway to address these deficits in preclinical and clinical studies, which include the use of better study cohorts, longitudinal designs, improved translation of data from preclinical models, multi-omics profiling, identification of new biomarker candidates and refinement of computational tools and databases containing relevant information. Such efforts will support future interdisciplinary studies and help to identify potential new targets that are amenable to therapeutic approaches such as pharmacological interventions to increase the human healthspan in parallel with the lifespan.The captions to Figures 1-4 in this article as originally published were mismatched with the figures themselves.Microtubule-associated protein tau (MAPT) is a key protein, which is mainly identified as an essential factor for microtubule dynamics and neuronal outgrowth. Though tau has several functions, regulation of insulin signaling is one among them to control type 2 diabetes. Abnormal expression of tau protein leads to hyperphosphorylation and is known as tauopathies. The presence of alloxan occurs in refined wheat flour, especially in various baking products such as parotta, a well-known South Indian dish. In this study, the reduced form of alloxan called dialuric acid can enter the beta cells of islets of Langerhans and binds MAPT to induce toxicity by hyperphosphorylating the tau protein, which ultimately causes destruction to pancreatic beta cells, and it leads to diabetes mellitus. Here, the toxic effects of dialuric acid targeting MAPT through in silico computational predictions have been investigated. The 3D structure of MAPT protein was constructed through I-Tasser, and it has been refined and validated by GalaxyRefine and PROCHECK. The structure of ligand was retrieved from PubChem. Molecular docking was accomplished by AutoDock 4.2 software, and the results indicate the strong binding affinity between dialuric acid and MAPT protein, and it showed a binding free energy (∆G) of - 3.72 kcal/mol. Dialuric acid binds with the active region SER 232 of MAPT whereby it hyperphosphorylates the protein to become toxic. Also, ADMET results strongly suggest that the compound dialuric acid possesses toxic property, and similarly, Ames test confirmed that it was found to be mutagenic. Thus, our results strongly revealed that dialuric acid was found to be toxic which could be able to damage the beta cells of the pancreas and abates insulin signaling, and finally, it leads to DM.Post-thrombotic syndrome (PTS) occurs in 20-50% of patients with proximal deep vein thrombosis (DVT). In this study, we aimed to identify potential markers of thrombolysis success at the early stage and to clarify the relationship between early thrombolysis success and subsequent PTS development in patients with acute DVT in the iliac vein. Fifty-two consecutive patients with acute iliofemoral DVT who were treated with catheter-directed thrombolysis (CDT) within 21 days of onset were enrolled. An infusion catheter with multiple side holes was placed to cover the thrombosed vessel entirely. Urokinase solution was administered either continuously or with the pulse-spray method at a dose of 480,000-720,000 IU/day over the course of 2-7 days. During CDT, unfractionated heparin (UFH) was infused simultaneously via the access sheath to prevent thrombus formation. Early success was defined as lysis grade ≥ 50% and restoration of forward flow. PTS was diagnosed based on the Villalta scale. Based on the lysis grading method, complete lysis (grade III) was achieved in 8 of 52 (16%) limbs. Lysis grade II (50-99%) was achieved in 35 of 52 (67%) limbs. Lysis grade I ( less then  50%) was achieved in 9 of 52 (17%) limbs. Therefore, grade II and grade III lytic outcomes (early success) were observed in 43 patients (83%). One-year clinical follow-up was performed for 43 patients (83%). PTS occurred in seven (16%) patients. Early success was more frequently observed in patients without PTS than in those with PTS (92% vs. 43%; P  less then  0.01). Early success was only significantly associated with PTS in the multivariate analysis. Patients with acute symptomatic iliofemoral DVT who had early success from CDT treatment during the acute phase less frequently progressed to PTS. Patients with early success tended to undergo the pulse-spray method and had a shorter interval from symptom onset to CDT. Glutathione The use of pulse-spray method and early initiation of CDT since DVT onset were potential markers of thrombolysis success.