L-Homocystine
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L-Homocystine

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L-Homocystine is a cardiovascular risk factor in prediction of coronary heart disease as well as being associated with congenital birth defects, pregnancy complications and cancer.

Category
L-Amino Acids
Catalog number
BAT-008071
CAS number
626-72-2
Molecular Formula
C8H16N2O4S2
Molecular Weight
268.35
L-Homocystine
IUPAC Name
(2S)-2-amino-4-[[(3S)-3-amino-3-carboxypropyl]disulfanyl]butanoic acid
Synonyms
(2S,2'S)-4,4'-Dithiobis[2-aminobutanoic Acid]; [S-(R*,R*)]-4,4'-Dithiobis[2-aminobutanoic Acid]; L-4,4'-Dithiobis[2-aminobutyric Acid]
Appearance
White to off-white crystalline powder
Purity
≥ 99% (Assay)
Density
1.4±0.1 g/cm3
Melting Point
>240°C (dec.)
Boiling Point
507.6±50.0 °C at 760 mmHg
Storage
Store at 2-8 °C
Solubility
Soluble in Aqueous Acid
InChI
InChI=1S/C8H16N2O4S2/c9-5(7(11)12)1-3-15-16-4-2-6(10)8(13)14/h5-6H,1-4,9-10H2,(H,11,12)(H,13,14)/t5-,6-/m0/s1
InChI Key
ZTVZLYBCZNMWCF-WDSKDSINSA-N
Canonical SMILES
C(CSSCCC(C(=O)O)N)C(C(=O)O)N

L-Homocystine, an amino acid derivative with diverse biochemical and medical applications, is at the forefront of scientific exploration. Here are four key applications of L-Homocystine:

Cardiovascular Disease Research: Delving deep into cardiovascular research, scientists focus on the intricate role of L-Homocystine in elucidating the links between elevated homocysteine levels and increased heart disease risk. By studying how L-Homocystine impacts vascular health and contributes to atherosclerosis, researchers aim to uncover the underlying mechanisms. This research is pivotal in developing innovative therapeutic strategies to effectively manage and mitigate cardiovascular risk factors.

Nutritional Biochemistry: In the realm of nutritional biochemistry, L-Homocystine serves as a cornerstone in investigating the complex interplay of amino acids and their derivatives in human health. Scientists meticulously analyze the connections between homocysteine metabolism and the status of essential nutrients such as vitamin B6, B12, and folate. By understanding these intricate relationships, researchers can devise strategic dietary interventions to address deficiencies, shedding light on the nutritional foundation of various metabolic disorders.

Pharmacological Testing: Within pharmacological research, L-Homocystine takes center stage in evaluating the effectiveness of drugs designed to lower homocysteine levels. Through the creation of sophisticated in vitro and in vivo models, researchers assess the impact of different compounds on homocysteine metabolism and vascular health. These studies play a pivotal role in identifying and optimizing potential therapies for hyperhomocysteinemia.

Metabolic Pathway Studies: At the forefront of biochemical research, L-Homocystine serves as a key component in exploring the intricate pathways of sulfur amino acid metabolism and their implications for various physiological processes. Scientists meticulously investigate how enzymes like cystathionine β-synthase and methionine synthase interact with homocysteine and homocystine, unraveling the complexities of metabolic diseases. This in-depth knowledge is essential for developing precision-targeted treatments that hold immense potential for transforming therapeutic approaches in metabolic disorders.

2. 2 minute non-invasive screening for cardio-vascular diseases: relative limitation of C-Reactive Protein compared with more sensitive L-Homocystine as cardio-vascular risk factors; safe and effective treatment using the selective drug uptake enhancement method
Yoshiaki Omura, Yasuhiro Shimotsuura, Motomu Ohki Acupunct Electrother Res. 2003;28(1-2):35-68. doi: 10.3727/036012903815901741.
Contrary to the present practice of measurement of cardio-vascular risk factors or inflammatory risk factors such as C-Reactive Protein (CRP) from a blood sample from the vein of one arm, by using the Bi-Digital O-Ring Test Resonance Phenomena between 2 identical substances, one can non-invasively detect the approximate location on the body of abnormally increased risk factors in just 2 minutes, by detecting the resonance with L-Homocystine, even when blood CRP failed to detect any abnormality. This is performed by projecting a 0.5 to approximately 5mW red spectral laser beam with 560-670nm wavelength, to at least 6 standard parts of the body, when one of the control risk markers placed next to the laser beam also exists in the part of the body tested. It is generally believed that CRP is increased in the presence of acute myocardial infarct, chronic rheumatoid arthritis, ulcerative colitis, metabolic abnormalities such as often detected in diabetes, inflammation and underlying infection of the cardio-vascular system, and in some cancers. However, in our study, when the clinical significance of CRP and L-Homocystine was compared, we found that CRP often was not increased when there was extensive infection of Mycobacterium Tuberculosis as well as asymptomatic infection by Cytomegalovirus, Herpes Simplex Virus Type I, Human Herpes Virus Type 6, Borrelia Burgdorferi, or Chlamydia Trachomatis in the heart (and other parts of the body), particularly when there was liver cell dysfunction such as an increase in ALT. In contrast, L-Homocystine was often increased in the presence of localized infections of the heart and other parts of the body. For screening of Cardio-Vascular diseases by this method, 0.5mg of L-Homocystine as a control marker was found to be the most sensitive and reliable, compared with most effective amount of CRP, 0.5ng, for detecting early Cardio-Vascular problems due to various localized infections. About 0.5ng of cardiac Troponin T and cardiac Troponin I were also useful for detecting early stages of heart disease but they are not as sensitive as L-Homocystine. Once the pathogenic factors were identified, the effective medication was given, and the Selective Drug Uptake Enhancement Method (originally discovered by the first author in 1990) was applied after the effective drug was administered, to selectively deliver the medication to the pathological area, while reducing drug uptake to the normal parts of the body. As a result, the therapeutic effect was markedly accelerated.
3. Activation of Hageman factor by L-homocystine
O D Ratnoff Science. 1968 Nov 29;162(3857):1007-9. doi: 10.1126/science.162.3857.1007-a.
L-Homocystine activates Hageman factor, as demonstrated by its capacity to initiate clotting and to induce the evolution of plasma kinins. Perhaps, strategically located deposits of this amino acid are responsible for the unusual frequency of thrombosis in patients with homocystinuria.
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