A Protein/Creatinine Ratio (PCR), also known as the Urine Protein Creatinine Ratio (UPCR) test, measures the levels of protein and creatinine in urine. This ratio helps evaluate kidney function and detect conditions like kidney disease or proteinuria (excess protein in the urine).

The UPCR test is valuable in diagnosing and monitoring kidney-related issues, including chronic kidney disease, diabetic nephropathy, and hypertensive nephropathy. Additionally, it can help healthcare providers determine the effectiveness of treatment plans for these conditions.

The urine protein/creatinine ratio (UPCR) is a spot urine test that estimates 24-hour protein excretion without requiring a full-day urine collection. A normal result is below 0.2 mg/mg (the same as below 200 mg/g — different units for the same measurement). A result in the 0.2–0.5 mg/mg range (200–500 mg/g) indicates moderate proteinuria; above 0.5 mg/mg (500 mg/g) indicates significant proteinuria. An elevated UPCR is most commonly caused by chronic kidney disease, diabetic nephropathy, hypertension, or acute conditions such as dehydration or infection — but always requires clinical evaluation to determine the underlying cause.

The Protein/Creatinine Ratio in a test panel that includes Total Protein and Protein Electrophoresis, 24 Hour Urine, is a significant indicator of kidney function and health. This ratio compares the amount of protein to the amount of creatinine in a urine sample, providing a more accurate assessment of protein excretion than measuring protein alone. In healthy kidneys, protein is retained in the bloodstream, and only small amounts are excreted in urine, whereas creatinine, a waste product, is consistently excreted. An elevated Protein/Creatinine Ratio can indicate abnormal protein loss through the kidneys, a condition known as proteinuria, which is often a sign of kidney damage or disease. By normalizing the protein level to the creatinine level, this ratio helps account for variations in urine concentration and provides a more reliable assessment of proteinuria, particularly important for early detection and monitoring of kidney disease.

Autoantibodies to proteinase-3 (PR-3) are accepted as characteristic for granulomatosis with polyangiitis (GPA, Wegener's), and are detectable in 95% of the histologically proven cases. The cytoplasmic IFA pattern, (c-ANCA), is based largely on autoantibody to PR-3 which serves as the primary antigen. These autoantibodies are present in active disease.

Proteobacteria (phylum)

Proteobacteria include a wide variety of pathogens, including species within the Escherichia, Shigella Salmonella, Vibrio, and Helicobacter genera. The phylum includes a number of species that are permanent residents of the microbiota and capable of inducing nonspecific inflammation and diarrhea when their presence is increased. Proteobacteria make up approximately 2% of the gut microbiota in healthy adults.

A high-fat diet is positively associated with an abundance of Proteobacteria. Slightly increased abundance of Proteobacteria may be associated with low-grade inflammation. Proteobacteria are increased in inflammatory bowel disease and irritable bowel syndrome. Higher abundance of Proteobacteria has been associated with a moderate to severe disease course in newly discovered ulcerative colitis patients. They are associated with diarrhea in IBS.

Proteobacteria are a diverse phylum, comprised with several subclasses: Alphaproteobacteria, Betaproteobacteria, Gammaproteobacteria, Deltaproteobacteria, Epsilonproteobacteria, and Zetaproteobacteria.

The Proteobacteria are commonly occurring in healthy mammalian GI microbiomes and include common human pathogens. Proteobacteria contribute to homeostasis of the anaerobic environment of the gastrointestinal tract. It has a role in protein and sugar degradation and maintaining oxygen homeostasis within the gut.

Gram-negative Proteobacteria are a source of lipopolysaccharide associated with metabolic endotoxemia. Bifidobacterium species within Actinobacteria produce health-promoting metabolites like IL-10, SCFA, and GABA. Consuming a balanced diet with a wide variety of fibers, polyphenols, and a healthy level of fat can help balance this ratio.

Opportunistic Bacteria associated with Autoimmunity. 

Gram-negative bacteria in the Proteobacteria phylum. High levels may indicate increased intestinal inflammatory activity; May contribute to loose stools or diarrhea; Pets or wild animals can be a source

Opportunistic Bacteria associated with Autoimmunity. 

Gram-negative bacteria in the Proteobacteria phylum. High levels may indicate increased intestinal inflammatory activity; May contribute to loose stools or diarrhea; Pets or wild animals can be a source.

Opportunistic Bacteria associated with Autoimmunity. 

Gram-negative bacteria in the Proteobacteria phylum. High levels may indicate increased intestinal inflammatory activity; May contribute to loose stools or diarrhea; Pets or wild animals can be a source

Gram-negative bacteria in the Proteobacteria phylum. High levels may indicate increased intestinal inflammatory activity; May contribute to loose stools or diarrhea; Pets or wild animals can be a source.

Gram-negative bacteria in the Proteobacteria phylum. High levels may indicate increased intestinal inflammatory activity; May contribute to loose stools or diarrhea; Pets or wild animals can be a source.

Prothrombin Fragment 1.2 is stable degradation product and its measurement in plasma can be used as a marker of Thrombin generation. Measurement of F1+2 has been used to diagnose Pre-thrombotic states and Thrombotic disorders and in addition to monitor the efficacy of treatment in these disorders.