Lactate Dehydrogenase

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Lactate Dehydrogenase

Reagent | Lactate Dehydrogenase

Key Benefits

Excellent precision

The LD assay showed a precision of less than 4% CV

Exceptional correlation

The assay showed a correlation of r=0.98 against another commercially available method

Flexibility

Liquid and lyophilised reagents available, offering greater consumer choice

Randox Lactate Dehydrogenase L-P (LDH) (NAD)

  • LDH NAD method
  • Liquid ready-to-use reagents
  • Stable to expiry at 2-8°C
Cat NoSize
LD3842R1 6 x 20ml (L)
R2 3 x 18ml
EnquireKit Insert RequestMSDSBuy Online
(L) Indicates liquid option

Instrument Specific Applications (ISA’s) are available for a wide range of biochemistry analysers.  Contact us to enquire about your specific analyser.

Randox Lactate Dehydrogenase P-L (UV)

  • UV method
  • Liquid and lyophilised reagents available
  • Stable to expiry at 2-8°C
Cat NoSize
LD3818R1 6 x 20ml (L)
R2 3 x 11ml
EnquireKit Insert RequestMSDSBuy Online
LD8051R1 6 x 56ml (L)
R2 6 x 20ml
EnquireKit Insert RequestMSDSBuy Online
LD8322R1 4 x 20ml (L)
R2 4 x 7ml
EnquireKit Insert RequestMSDSBuy Online
(L) Indicates liquid option

Instrument Specific Applications (ISA’s) are available for a wide range of biochemistry analysers.  Contact us to enquire about your specific analyser.

What is Lactate Dehydrogenase assay used for?

Lactate dehydrogenase (LD) catalyses the interconversion of lactic acid and pyruvic acid. The enzyme is composed of 4 peptide chains and exists in 5 isomeric forms. LD is widely distributed throughout the body, and the highest concentrations are found in the liver, heart and skeletal muscle. LD activity is significantly elevated during myocardial infarction. Maximum levels are reached 24 to 48 hours after the onset of chest pain and may remain elevated for 7 to 12 days post infarction. Increases in LD activity are also associated with other pathological conditions including liver disease, progressive muscular dystrophy, megaloblastic and pernicious anaemia.

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    Lactate

    Reagent | Lactate

    Key Benefits

    Excellent stability

    Stable to expiry date when stored at +2 to +8°C

    Exceptional correlation

    The assay showed a correlation of r=0.99 against another commercially available method

    Lyophilised reagents

    The Randox L-Lactate assay is supplied in a lyophilised format, enhancing stability and reducing wastage

     

    Other features

    • Colorimetric method
    • Lyophilised reagents
    • Working reagent stable for 2 weeks at 15-25°C

    Ordering information

    Cat NoSize
    LC2389R1a 1 x 100ml (S)
    R1b 16 x 6ml
    EnquireKit Insert RequestMSDSBuy Online
    LC3980R1a 4 x 20.5ml
    R1b 4 x 20.5ml
    EnquireKit Insert RequestMSDSBuy Online
    (S) Indicates standard included in kit

    Instrument Specific Applications (ISA’s) are available for a wide range of biochemistry analysers.  Contact us to enquire about your specific analyser.

    What is Lactate assay used for?

    Increased concentration of lactate in the blood is an indicator of anaerobic metabolism i.e. blood flow to the tissues decrease and oxygen delivery is insufficient. In cases of severe oxygen deprivation “Lactic Acidosis” may occur. L-Lactate may therefore be used as an indicator of severity of circulatory failure.

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    Iron

    Reagent | Iron


    Key Benefits

    Excellent precision

    The Iron (ferene) assay showed a precision of less than 3.5% CV

    Exceptional correlation

    The assay showed a correlation of r=0.99 against another commercially available method

    Liquid and lyophilised reagents available

    Offering convenience and choice

    Randox Iron- Ferrozine

    • Ferrozine method
    • Liquid ready-to-use reagents
    • Stable to expiry when stored at 15-25⁰C
    Cat NoSize
    SI3821R1 6 x 20ml (L)
    R2 3 x 11ml
    EnquireKit Insert RequestMSDSBuy Online
    SI8049R1 7 x 15.5ml (L)
    R2 7 x 6.7ml
    EnquireKit Insert RequestMSDSBuy Online
    SI8330R1 4 x 20ml (L)
    R2 4 x 7ml
    EnquireKit Insert RequestMSDSBuy Online
    (L) Indicates liquid option

    Instrument Specific Applications (ISA’s) are available for a wide range of biochemistry analysers.  Contact us to enquire about your specific analyser.

    What is Iron assay used for?

    Iron deficiency is one of the most prevalent human disorders. In adults iron deficiency is often symptomatic of chronic blood loss. Iron deficiency results in deficient haem synthesis with the subsequent symptoms of anaemia due to tissue hypoxia. Iron (non-heme) measurements are used in the diagnosis and treatment of diseases such as iron deficiency anaemia, hemochromatosis (a disease associated with widespread deposit in the tissues of two iron-containing pigments, hemosiderin and hemofuscin, and characterized by pigmentation of the skin), and chronic renal disease.

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      Clinical Chemistry Panel

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      GLDH

      Glutamate Dehydrogenase (GLDH)

      Key benefits of the Randox Glutamate Dehydrogenase (GLDH) reagent

      Lyophilised Reagents

      The Randox GLDH (DGKC) assay is lyophilised for enhanced stability

      Exceptional correlation

      The GLDH (DGKC) assay showed a correlation of r=0.99 against another commercially available method

      Stability

      Open vial stability of 1 week at+2oC to +8oC.

      Ordering information

      Cat NoSize
      GL441R1a 1 x 70ml
      R1b 8 x 6ml
      R2 2 x 20ml
      EnquireKit Insert RequestMSDSBuy Online
      GL442R1a 5 x 100ml
      R1b 5 x 100ml
      R2 2 x 20ml
      EnquireKit Insert RequestMSDSBuy Online

      Instrument Specific Applications (ISA’s) are available for a wide range of biochemistry analysers.  Contact us to enquire about your specific analyser.

      What is GLDH assay used for?

      GLDH measurements can be taken to evaluate the liver function. Elevated blood serum levels indicate liver damage. GLDH also plays an important role in the differential diagnosis of liver disease, especially in combination with aminotransferases.

      Liver diseases such as toxic liver damage or hypoxic liver disease are characterised by high serum levels. In clinical trials, GLDH can also be used as a measurement for the safety of a drug.

      The Randox GLDH is an optimised standard method according to the recommendations of the Deutsche Gesellschaft für Klinische Chemie. This procedure measures the non specific creep reaction.

      Clinical Chemistry Panel

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      Gamma GT

      Reagent | Gamma GT

      Benefits of the Gamma GT Assay

      Exceptional correlation

      The assay showed a correlation of r=0.99 against another commercially available method

      Excellent stability

      Stable to expiry when stored at 2-8⁰C

      Liquid ready-to-use

      The Randox Gamma GT reagent is available in a liquid ready to use format for convenience and ease of use.

      Randox Gamma GT (Colorimetric)

      • Colorimetric method
      • Liquid ready-to-use reagents
      • Stable to expiry when stored at 2-8⁰C

      Ordering Information

      Cat NoSize
      GT3817R1 6 x 51ml (L)
      R2 6 x 14ml
      EnquireKit Insert RequestMSDSBuy Online
      GT38746 x 21ml (L)EnquireKit Insert RequestMSDSBuy Online
      GT8320R1 4 x 20ml (L)
      R2 4 x 7ml
      (Mod. IFCC)
      EnquireKit Insert RequestMSDSBuy Online
      GT8146R1 7 x 20ml (L)
      R2 7 x 8ml
      EnquireKit Insert RequestMSDSBuy Online
      (L) Indicates liquid option

      Instrument Specific Applications (ISA’s) are available for a wide range of biochemistry analysers.  Contact us to enquire about your specific analyser.

      What is Gamma GT assay used for?

      Gamma-glutamyltransferase (GT) in serum originates primarily from the hepatobiliary system. Therefore GT is elevated in all forms of liver disease and has been shown to be more sensitive than alkaline phosphatase in detecting obstructive jaundice, cholangitis and cholecystitis. High levels of GT are also seen in patients with primary or secondary liver cancer. Increased levels are also observed in cases of alcohol abuse and in alcoholic liver cirrhosis. In patients receiving anticonvulsant drugs such as phenytoin and phenobarbital, increased levels of the enzyme in serum may reflect induction of new enzyme activity and the toxic effects of alcohol and other drugs on the microsomal structures in liver cells. GT is the most sensitive enzymatic indicator of hepatobiliary disease, and can be used in combination with other biochemical markers to discriminate between different types of hepatobiliary disease.

      • Haçariz, O. et al. The effect of Quil A adjuvant on the course of experimental Fasciola hepatica infection in sheep. Vaccine 2009, 27(1): 45-50
      • Haçariz, O. et al. IL-10 and TGF-β1 are associated with variations in fluke burdens following experimental fasciolosis in sheep. Parasite Immunol. 2009, 31(10): 613-622
      • Gbadegesin, M.A., et al. In vitro antioxidant/radical scavenging activities and hepatoprotective roles of ethanolic extract of Cassia occidentalis leaves in sodium arsenite-treated male Wistar rats. Br. J. Med. Med. Res. 2013, 3(4): 2141-2156

      Clinical Chemistry Panel

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      CO2 Total Reagent

      Reagent | CO2 Total

       

      Key Benefits of the Randox CO2 Total Reagent

      Exceptional correlation with standard methods

      The Randox methodology was compared against other commercially available methods and the Randox CO2 Total assay showed a correlation coefficient of r=0.94

      Wide measuring range

      The healthy range for CO2 Total is 18 – 28 mmol/l. The Randox CO2 Total assay can comfortably detect levels outside of this healthy range measuring between 0.004 – 50 mmol/l

      Suitable for use on a range of automated analysers

      The Randox CO2 Total reagent is suitable for use on a number of third party automated analysers. To enquire about an Instrument Specific Application (ISA), please click the Contact Us button below.

      Other features

      • Enzymatic method
      • Liquid ready-to-use reagent
      • Stable until expiry date when stored at +2 to +8°C
      • Open vial stability of 14 days at +10°C
      • Measuring range 0.004 – 50 mmol/l

      Ordering information

      Cat NoSize
      CD40064 x 21.7ml (C)(L)EnquireKit Insert RequestMSDSBuy Online
      (L) Indicates liquid reagent
      (C) Indicates calibrator included in kit

      Instrument Specific Applications (ISA’s) are available for a wide range of biochemistry analysers.  Contact us to enquire about your specific analyser.

      What is CO2 Total used for?

      Carbon dioxide (CO2) is a metabolic waste product of cellular respiration. It is transported in the bloodstream to the lungs and expelled from the body. CO2 exists in the body in two forms: 90% exists as bicarbonate (HCO3) and the remaining exists as carbonic acid (H2CO3) or dissolved CO2. The kidneys and lungs are responsible for the regulation on CO2, H2CO3 and HCO3 in the blood.

      What is the CO2 Total assay used for?

      The Randox CO2 Total assay is used for the quantitative in vitro determination of CO2 in serum and plasma.  It aids in diagnosing diseases associated with high and low levels of CO2 in the bloodstream.

      Slightly elevated levels of CO2 do not have any serious consequences on the body, but overexposure to CO2 due to decreased alveolar ventilation or the inhalation of CO2 enriched air can cause serious implications in the body including: deterioration of respiratory functions due to respiratory acidosis and asphyxiation, cardiovascular effects due to low blood pressure and cardiac arrhythmia and nerve damage due to hypercapnia and acidemia.

      For more information on the contrasting effects of hypoxia and hypercapnia, please click here.

      High CO2 levels usually indicates that the lungs are not functioning properly and are unable to expel the required amount of CO2. During an acute illness, the levels of CO2 can increase suddenly, however, over time, some people are able to establish a new ‘baseline’ for CO2. An example of this is a person with stable chronic obstructive pulmonary disease (COPD) This means that the body is able to function with higher than normal levels of CO2.

      There are some medical conditions and drugs that can cause low CO2 levels including: kidney disease as the kidneys are unable to carry out their functions, diabetic ketoacidosis due to the production of ketones resulting in reduced CO2 levels, hyperchloremic acidosis due to diarrhea, Addison’s disease, and metabolic acidosis due to chemical toxicity.

      Clinical Chemistry Panel

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      Zinc Assay

      Reagent | Zinc


      Benefits of the Randox Zinc Assay

      Excellent correlation

      A correlation coefficient of r=0.9946 was displayed when the Randox method was compared against other commercially available methods.

      Excellent precision

      The Randox zinc assay displayed a within run precision of <3.87%.

      Liquid ready-to-use

      The Randox zinc assay is available in a liquid ready-to-use format for convenience and ease-of-use.

      Standard supplied with the kit

      The standard is supplied with the zinc kit, simplifying the ordering process.

      Controls available

      Controls available offering a complete testing package.

      Applications available

      Applications available detailing instrument-specific settings for the convenient use of the Randox zinc assay on a variety of clinical chemistry analysers.

      Ordering Information

      Cat NoSize
      ZN2341R1 1 x 50ml (S) (L)
      R2 1 x 250ml
      with Deproteinisation
      EnquireKit Insert RequestMSDSBuy Online
      ZN26076 x 50ml (L)
      Deproteinising Solution
      EnquireKit Insert RequestMSDSBuy Online
      (L) Indicates liquid option
      (S) Indicates standard included in kit

      Instrument Specific Applications (ISA’s) are available for a wide range of biochemistry analysers.  Contact us to enquire about your specific analyser.

      Physiological Significance

      Zinc (ZN) is an essential trace element (micronutrient) and plays a vital role in several biological processes 1. ZN is released from food as free ions during digestion. Specific transport proteins facilitate the passage of ZN across cell membranes into circulation. 70% of circulatory ZN is bound to albumin 2. As ZN does not attain redox properties, it is capable of transportation around the biological systems without inducing oxidative damage, which can occur with other essential trace elements like copper 3.

      ZN has a key role in growth, reproduction, sexual maturity and the immune system. ZN is vitally important in the functionality of >300 enzymes utilised in the stabilisation of DNA and gene expression 1. ZN can constitute strong, yet readily available flexible and exchangeable, complexes with organic molecules, enabling it to modify the three-dimensional structure of specific proteins, nucleic acids, and cellular membranes, thereby influencing the catalytic properties of many enzyme systems and intracellular signalling. ZN is associated with >50 metalloenzymes with a diverse range of functions and so ZN plays a central role in metabolism, differentiation and cellular growth 3.

      Deficiency

      Zinc deficiency has been identified as a malnutrition issue worldwide. ZN deficiency is more prevalent in areas of low animal consumption and high cereal consumption. It’s not that the diet is low in ZN but more so the bio-availability of ZN which plays a major role in its absorption. Phytic acid has been identified as the main inhibitor of ZN. Adolescents, children, infants, lactating women and pregnant women have increased requirements for ZN and so are at higher risk of zinc depletion. During growth periods, ZN deficiency causes growth failure. The organs most affected by ZN deficiency include: central nervous system, epidermal, gastrointestinal, immune, reproductive and skeletal systems 2.

      Toxicity

      As there are multiple sources of ZN in the environment, exposure to and toxicity from ZN are not uncommon. Case reports have documented zinc toxicity caused by: overuse of dietary supplements, inhalation from occupational sources, denture cream and ingestion of pennies, to which some of these cases had fatal outcomes 4.

      It is believed that ZN toxicity from acute exposure differs significantly from chronic toxicity. In acute exposures, ingestions of ZN sulfate and concentrated ZN chloride will primarily result in gastrointestinal symptoms, such as haematemesis. Renal injury, liver necrosis, coagulopathy and even death have been reported following acute exposures 4.

      Chronic exposure caused by excessive consumption of ZN, resulting in copper deficiency can lead to myelodysplastic syndrome, granulocytopenia and sideroblastic anaemia 4.

      Publications


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        D-3-Hydroxybutyrate (Ranbut)

        Reagent | D-3-Hydroxybutyrate (Ketone)

        D-3-Hydroxybutyrate: A Superior Marker of Ketoacidosis

        Benefits of the Randox D-3-Hydroxybutyrate (Ketone) Assay

        Superior Performance

        Superior methodology

        The commercially available nitroprusside method is a semi-quantitative dipstick test which only detects acetone and acetoacetate. As the most abundant ketone produced during ketosis, D-3-hydroxybutyrate is more sensitive and specific.

        Correlation

        Exceptional correlation

        A correlation coefficient of r=0.9954 was displayed when the Randox method was compared against other commercially available methods.

        Precision

        Excellent precision

        The Randox Ranbut assay displayed an excellent precision of <3.5%.

        Calibrator & Control

        Calibrator and controls available

        Calibrator and controls are available offering a complete testing package.

        Logos-07

        Applications available

        Applications available detailing instrument-specific settings for the convenient use of the Randox Ranbut assay on a variety of clinical chemistry analysers.

        Ordering Information

        Cat NoSize
        RB100710 x 10ml (S)EnquireKit Insert RequestMSDSBuy Online
        (L) Indicates liquid option (S) Indicates standard included in kit

        Instrument Specific Applications (ISA’s) are available for a wide range of biochemistry analysers.  Contact us to enquire about your specific analyser.

        Diagnostic Uses

        • Diabetic Ketoacidosis (DKA)
        • Traditional Methods
        • Clinical Significance
        • Physiological Significance

        Ketosis is a metabolic process that occurs when the body switches from glucose to predominantly fat metabolism for energy production, this happens when carbohydrate availability reaches low levels. The metabolism of fatty acids in the liver results in the production of chemical by-products known as ketone bodies or ketones. Ketosis occurs when the body produces more ketones than the liver can process.

        DKA is a serious complication of both Type I Diabetes Mellitus (T1DM), however can also affect individuals with T2DM. The condition is linked to insulin deficiency and occurs when glucose levels are consistently high and insulin levels are severely low. Due to this imbalance glucose builds up in the blood and the body responds by metabolising fat rather than glucose. DKA is usually one of the first indicators of T1DM.

        Ketosis is not normally dangerous and is typical of ketogenic diets which are low in carbohydrates. Ketones however are poisonous when present in high levels leading to ketoacidosis, DKA for example if left untreated can cause damage to vital organs and in some instances may lead to a coma or death. DKA is commonly triggered by an illness, infection or missing insulin treatments.

        The American Diabetes Association recommends testing for ketosis in diabetics when symptoms of ketoacidosis are present, when
        glucose levels are consistently elevated, during pregnancy and if experiencing any illness. NICE also recommend monitoring ketones in patients with T1DM especially during periods of illness.

        Semi-quantitative, nitroprusside-based methods remain common for the detection of ketones in the blood and urine of diabetic patients. The nitroprusside method is available in both tablet and reagent test strip form where urine or blood is applied, and a colour change observed. There are several limitations associated with Nitroprusside methods;

        1. Capable of detecting only acetone and acetoacetate, as such they lack sensitivity especially in early stages of DKA.
        2. The intensity of the colour change observed is subjective compared to quantitative methods like D-3-Hydroxybutyrate which can be used to monitor  recovery and improvements to treatment.
        3. Several medications including Valproic Acid and Vitamin C can interfere with nitroprusside methods leading to false positive
          results.
        4. False negative results are common as the method does not detect the main ketone body – D-3-Hydroxybutyrate. As ketoacidosis improves and D-3-Hydroxybutyrate is converted to acetoacetate the result with urine dipsticks can appear positive despite the patient’s status improving by this stage.
        5. D-3-Hydroxybutyrate is a more reliable indicator of ketosis and DKA due to its superior stability when compared to acetone and
          acetoacetate.

          When the carbohydrate stores are significantly decreased, or the fatty acid concentration is increased, there is an upregulation of the ketogenic pathway and consequently, an increased production of ketone bodies. This is commonly observed in alcoholism, type I diabetes and starvation. Most organs, including the brain, can utilise ketones as its source of energy. The liver however, cannot utilise ketones, despite producing them, as the liver lacks the necessary enzyme ketoacyl-CoA transferase 1.

          Ketosis is the presence of ketones. Whilst ketosis is not dangerous, if left untreated, especially in diabetes, ketoacidosis (high levels of ketones) develops 2.

          In type 1 diabetes mellitus (T1DM), the body is unable to produce insulin resulting in bodily cells not receiving energy from glucose, causing the body to release hormones to breakdown fat for energy, producing ketones. If left untreated, diabetic ketoacidosis develops, a serious health condition. Diabetic ketoacidosis is commonly triggered by an illness, infection or missing insulin treatments 3.

          There are three main ketones produced as a result of ketosis; D – 3 – Hydroxybutyrate, acetoacetate and acetone.

          D-3-Hydroxybutyrate is the most abundant of the three accounting for 75% of total ketones in the body, it is later catabolised into acetoacetate and then into acetone. Due to the higher levels of D-3-Hydroxybutyrate, it is the more sensitive marker for the diagnosis of ketosis, in particular DKA.

           

          Ketogenesis is a biochemical process whereby the body produces ketone bodies (acetone, acetoacetate, beta-hydroxybutyrate. As ketone bodies are water soluble, they do not require lipoproteins for transport 1.

          In healthy humans, small amounts of ketones are continuously made for the body to use an energy. Ketone bodies increase in times of fasting and sleeping 1.

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          Calcium Reagent

          Reagent | Calcium

          Key Benefits of the Randox Calcium reagent

          Exceptional correlation with standard methods

          The Randox methodology was compared to other commercially available methods and the Randox Calcium assay showed a correlation coefficient of 0.99.

          Excellent stability

          Stable for 7 days at +2 to +8°C or expiry at +15 to +25°C

          Liquid ready-to-use

          The Randox calcium reagent is available in a liquid ready to use format for convenience and ease of use.

          Randox Calcium reagent (Arsenazo)

          Cat NoSize
          CA38719 x 51ml (L)EnquireKit Insert RequestMSDSBuy Online
          CA80218 x 68ml (L)EnquireKit Insert RequestMSDSBuy Online
          CA83094 x 20ml (L)EnquireKit Insert RequestMSDSBuy Online
          (L) Indicates liquid option

          Instrument Specific Applications (ISA’s) are available for a wide range of biochemistry analysers.  Contact us to enquire about your specific analyser.

          What is the Calcium assay used for?

          What is calcium?

          Calcium is the fifth most abundant element in the body. Most of it in the human adult is extracellular and 99% of it exists as crystalline hydroxyapatite in bones and teeth where it confers rigidity. It plays a major role in the mechanisms of nerve impulse transmission, muscular contraction and blood coagulation. Secretion from the parathyroid glands, thyroid C cells and pancreatic B cells is controlled by the extracellular ionised calcium concentration at the cell surface.

          What is the calcium assay used for?

          It is tested to diagnosis and monitor numerous conditions related to the heart, nerves, bones and kidneys.

          Hypercalcemia can be the result of hyperparathyroidism (overactive parathyroid gland), cancer, carcinomas, vitamin D overdoses and are of diagnostic value in detecting chronic renal disease and acute pancreatic disease.

          Hypocalcemia is associated with hypoparathyroidism (underactive parathyroid gland), vitamin D deficiency, calcium deficiency, kidney dysfunction and renal failure. For more information on risk factors for post-thyroidectomy hypocalcemia, please click here [external link].

          The Randox Calcium assay is used for the quantitative in vitro determination of calcium concentration in serum, plasma and urine.

          • Kauther, M.D., et al. Biochemical markers of particle induced osteolysis in C57BL/6 mice. Clin. Chem. Lab. Med., 2010, 48 (11): 1641-1646.

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          Homocysteine Assay

          Reagent | Homocysteine

          A Marker of Hyperhomocysteinemia

          Benefits of the Randox Homocysteine Assay

          Two-part liquid ready-to-use

          The Randox homocysteine assay is available in a two-part liquid ready-to-use format, limiting interference from bilirubin, haemoglobin, triglycerides and intralipid®, producing more accurate and precise results.

          Exceptional correlation

          The Randox homocysteine assay is standardised to the NIST SRM 1955 (Homocysteine Standard Reference Material) displaying a correlation coefficient of r=0.98 when compared to industry comparative methods.

          Excellent measuring range

          The Randox homocysteine assay has a measuring range of 1.7 – 47.9 μmol/l for the comfortable detection of clinically important results.

          Calibrator included in the kit

          The Randox homocysteine kit includes the calibrator simplifying the ordering process.

          Controls available

          Controls available offering a complete testing package.

          Applications available

          Applications available detailing instrument-specific settings for the convenient use of the Randox homocysteine assay on a variety of clinical chemistry analysers.

          Ordering information

          Cat NoSize
          HY4036R1 2 x 21.7ml (C)(L)
          R2 2 x 4.6ml
          EnquireKit Insert RequestMSDSBuy Online
          (L) Indicates liquid option
          (C) Indicates calibrator included in kit

          Instrument Specific Applications (ISA’s) are available for a wide range of biochemistry analysers.  Contact us to enquire about your specific analyser.

          • PHYSIOLOGICAL SIGNIFICANCE
          • Clinical Significance

          Homocysteine is a sulfur-containing amino acid produced by the intracellular demethylation of the essential amino acid, methionine. Homocysteine has three metabolic functions within the human body: firstly, to be remethylated into methionine; secondly, to enter the biosynthetic pathway of cysteine; and thirdly, to be released into the extracellular medium (blood and urine). The third metabolic function is the direct cause of elevated homocysteine concentrations in urine and plasma 1, 2.

          Hyperhomocysteinemia (elevated levels of homocysteine) has been identified in numerous conditions and disease states including, cardiovascular disease (atherosclerosis and thrombosis), pregnancy complications, psoriasis, cognitive impairment in the elderly, mental disorders, neural tube defects and birth defects 1, 2.

          Women with elevated levels of homocysteine have a 3-fold increased risk of CVD, whereas men have a 2-fold increased risk 3. Hyperhomocysteinemia correlates with an increased risk of colorectal cancer with elevated homocysteine levels being highly prevalent in patients with inflammatory bowel diseases which is believed to be associated with either an increased or decreased absorption of folate and other B vitamins 4. Hyperhomocysteinemia was associated with a 2 to 3-fold increased risk of abrupyio placentae, pregnancy-induced hypertension, and intrauterine growth restriction 5.

          Tri-Level Cardiac Control

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