Oxidative Stress, Vitamin D Deficiency and Male Infertility: An Under-Looked Aspect

2021 ◽  
pp. 1-3
Author(s):  
Maheen Shahid ◽  
Syeda Amrah Hashmi ◽  
Rehana Rehman ◽  
Admin
Keyword(s):  
Oxidative Stress ◽  
Vitamin D ◽  
Male Infertility ◽  
Vitamin D Deficiency ◽  
Vitamin D Receptor ◽  
Calcium Supplementation ◽  
Mutant Mice ◽  
Aromatase Activity ◽  
Vitamin D Receptors ◽  
Gonadal Dysfunction

Dear Madam, Infertility is a known source of distress among couples worldwide. This agony significantly stems from the concern of not having an identifiable cause leading to infertility. With male factors accounting for 20-30% of the total causes of infertility (1), a thorough evaluation of both the partners is done. Upon evaluation, Vitamin D deficiency was noticed significantly in males coming to infertility centres. However, its functions and how it impacted reproduction was not known until the research led to the discovery of Vitamin D Receptor (VDR) in many organs of the male reproductive tract. It is now known that vitamin D deficiency decreases male fertility by contributing to oxidative stress and gonadal insufficiency, disrupting spermatogenesis, affecting sperm morphology and normal calcium haemostasis. (2) Oxidative stress, caused by an imbalance between oxidative and antioxidative mechanisms, is believed to be a well-known mechanism underlying idiopathic male infertility. Reproductive health professionals and researchers fittingly started searching for antioxidants to combat this imbalance. A study concluded that adding vitamin D to a cryopreserved semen sample reduced oxidative stress and resulted in better fertility outcomes (3). Animal trials have shown that Vitamin D supplementation reduced oxidative stress and improved semen DNA integrity (4). As Vitamin D exerts its effects by binding to Vitamin D receptors, it was noted that vitamin D receptor null mutant mice had a significant reduction in successful reproductive outcomes due to gonadal insufficiencies. Reduced levels of oestrogen and testosterone were seen along with low sperm count, reduced motility, abnormal spermatogenesis and histological abnormalities in testes of mutant mice. These insufficiencies were attributed to a decreased CYP2R1, CYP27B1 and CYP24A1 expression, lower aromatase activity, secondary to suppression of CYP19 gene and calcium supplementation improved fertility in such cases. (5) There is limited human data available on how Vitamin D deficiency causes gonadal insufficiency, which is important to maintain normal reproductive physiology. More studied are needed to clarify the role of vitamin D in gonadal physiology. Considering the importance of Vitamin D on reproductive functions, its role in causing Oxidative stress and gonadal dysfunction, we suggest randomized control trials in pre-pubertal phase. Continuous....

scholarly journals The Health Benefits of Vitamin D Relevant for Tuberculosis

2014 ◽  
Vol 33 (4) ◽  
pp. 301-306 ◽  
Author(s):  
Vesna Škodrić-Trifunović ◽  
Ana Blanka ◽  
Mihailo I. Stjepanović ◽  
Svetlana Ignjatović ◽  
Violeta Mihailović-Vučinić ◽  
...  
Keyword(s):  
Vitamin D ◽  
Pulmonary Tuberculosis ◽  
Vitamin D Deficiency ◽  
Vitamin D Receptor ◽  
Active Form ◽  
Hypovitaminosis D ◽  
Vitamin D Receptors ◽  
Vitamin D Receptor Polymorphism ◽  
Receptor Polymorphism

Summary Vitamin D has an important role in numerous physiological functions. Vitamin D receptors are characterized by polymorphisms and presence in different tissues including a number of cells of the immune system. The role of vitamin D as a biological inhibitor of inflammatory hyperactivity is of particular importance. Hypovitaminosis D has been associated with many serious chronic diseases, such as autoimmune, infectious and cardiovascular diseases as well as some types of cancer. Vitamin D has an influence on the immune res ponse to tuberculosis. Calcitriol (1,25-dihydro xycholecalciferol), the major active form of vitamin D, has shown in vitro activity against Mycobacterium tuberculosis. It has been found that susceptibility to chronic mycobacterial infections is strongly correlated with a low vi tamin D intake and particular VDR alleles. Vitamin D deficiency might predispose the individuals infected with Myco bacterium tuberculosis to develop tu-ber culosis. Calcitriol binds to vitamin D receptors and modulates immune responses by regulating the transcription of genes responsive to vitamin D. Faster conversion of sputum mycobacterial culture in patients with pulmonary tuberculosis is associated with being a carrier of the t allele of the T a q I vitamin D receptor polymorphism. On the contrary, slower spu tum culture conversion in pulmonary tuberculosis has been found in the carriers of the f allele of the FokI vitamin D receptor polymorphism. The results of in vitro studies, clini-cal research and population studies indicated that vitamin D deficiency might be a strong risk factor for developing TB. Vitamin D is an inexpensive, easily accessible vitamin, relevant for the prevention of tuberculosis. In addition, vitamin D could contribute to the success of tuberculosis treatment.

Potential predictive marker of treatment effectiveness in patients with osteopenic syndrome after surgical menopause

GYNECOLOGY ◽  
2020 ◽  
Vol 22 (4) ◽  
pp. 39-42
Author(s):  
Yansiiat Z. Zaydieva ◽  
Elena V. Kruchinina ◽  
Olga S. Gorenkova ◽  
Elena Yu. Polyakova ◽  
Elena N. Kareva ◽  
...  
Keyword(s):  
Vitamin D ◽  
Combination Therapy ◽  
Vitamin D Receptor ◽  
Surrogate Marker ◽  
Predictive Marker ◽  
Expression Level ◽  
Mineral Density ◽  
Vitamin D Receptors ◽  
Surgical Menopause

Introduction. Patients with surgical menopause have a risk for osteopenic syndrome (OS). Menopausal hormone therapy (MHT) in combination with calcium and vitamin D promotes increase in bone mineral density (BMD). The expression level of vitamin D receptor in mononuclear fraction cells (MNFC) of blood can be considered as a predictive marker of effectiveness of OS therapy. Aim. To search a molecular predictive marker of the effectiveness of OS treatment. Materials and methods. The study included 100 women aged 4055 years with a duration of surgical menopause from 12 months to 6 years. The criterion for including patients in the study was the absence of contraindications to the use of MHT. The subject of the study was the determination of BMD by dual-energy X-ray absorptiometry, polymerase chain reaction diagnostics of the level of expression of vitamin D genes, estradiol and progesterone receptors, determination of 25-OH vitamin D in the blood. Results. Analysis of 12-month OS therapy effectiveness evaluated with a surrogate marker BMD. The increase in BMD up to 34% per year was treated as absence of negative dynamics, more than 4% per year as positive one. Significant effect of combination therapy compared with MHT on BMD in patients with surgical menopause with a low baseline level of BMD (due to hypovitaminosis D) is associated with the anti-inflammatory, bone-protective effect of vitamin D. In both groups of patients not responding; to the prescribed therapy we were able to conduct a comparative analysis of expression level of the target molecules in the MNFC before the start of treatment. The efficacy of MHT and combination therapy for BMD disorders is positively associated with the expression level of vitamin D receptors in MNFC before treatment. Therefore, the vitDR mRNA level is a potential predictive marker of the effectiveness of OS treatment. The expression levels of nuclear estradiol beta receptor and membrane receptor for progesterone in MNFC before treatment showed an upward trend in women responding to therapy. Conclusion. The expression level of the vitamin D receptor in MNFC of blood is significantly lower in the group of women with no/insufficient effect on 12-month combined therapy. This indicator can be considered as a predictive marker of the effectiveness of OS therapy.

Vitamin D and Sleep Regulation: Is there a Role for Vitamin D?

2020 ◽  
Vol 26 (21) ◽  
pp. 2492-2496 ◽  
Author(s):  
Fiammetta Romano ◽  
Giovanna Muscogiuri ◽  
Elea Di Benedetto ◽  
Volha V. Zhukouskaya ◽  
Luigi Barrea ◽  
...  
Keyword(s):  
Vitamin D ◽  
Sleep Disorders ◽  
Vitamin D Deficiency ◽  
Sleep Apnea Syndrome ◽  
Regulatory Mechanisms ◽  
Sleep Regulation ◽  
Vitamin D Receptors ◽  
Obstructive Sleep ◽  
The Impact

Background: Vitamin D exerts multiple pleiotropic effects beyond its role in calcium-phosphate metabolism. Growing evidence suggests an association between hypovitaminosis D and sleep disorders, thus increasing the interest in the role of this vitamin in the regulatory mechanisms of the sleep-wake cycle. Objective: The study aimed to explore and summarize the current knowledge about the role of vitamin D in sleep regulation and the impact of vitamin D deficiency on sleep disorders. Methods: The main regulatory mechanisms of vitamin D on sleep are explained in this study. The literature was scanned to identify clinical trials and correlation studies showing an association between vitamin D deficiency and sleep disorders. Results: Vitamin D receptors and the enzymes that control their activation and degradation are expressed in several areas of the brain involved in sleep regulation. Vitamin D is also involved in the pathways of production of Melatonin, the hormone involved in the regulation of human circadian rhythms and sleep. Furthermore, vitamin D can affect sleep indirectly through non-specific pain disorders, correlated with alterations in sleep quality, such as restless legs syndrome and obstructive sleep apnea syndrome. Conclusions: : Vitamin D has both a direct and an indirect role in the regulation of sleep. Although vitamin D deficiency has been associated to sleep disorders, there is still scant evidence to concretely support the role of vitamin D supplementation in the prevention or treatment of sleep disturbances; indeed, more intervention studies are needed to better clarify these aspects.

scholarly journals To Supplement or not to Supplement? The Rationale of Vitamin D Supplementation in Systemic Lupus Erythematosus

2018 ◽  
Vol 12 (1) ◽  
pp. 226-247 ◽  
Author(s):  
Alessandra Nerviani ◽  
Daniele Mauro ◽  
Michele Gilio ◽  
Rosa Daniela Grembiale ◽  
Myles J. Lewis
Keyword(s):  
Systemic Lupus Erythematosus ◽  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Lupus Erythematosus ◽  
Clinical Manifestations ◽  
Vitamin D Supplementation ◽  
Current Evidence ◽  
Systemic Lupus ◽  
Vitamin D Receptors ◽  
Vitamin D Levels

Background: Systemic Lupus Erythematosus (SLE) is a systemic autoimmune disease characterised by abnormal activation of the immune system, chronic inflammation and organ damage. Lupus patients are more prone to be vitamin D deficient. However, current evidence is not conclusive with regards to the role played by vitamin D in SLE development, progression, and clinical manifestations. Objective: Here, we will summarise the current knowledge about vitamin D deficiency prevalence, risk factors, molecular effects, and potential pathogenic role in SLE. We will focus on the link between vitamin D deficiency and lupus clinical manifestations, and on the clinical trials assessing the effects of vitamin D supplementation in SLE. Method: A detailed literature search was performed exploiting the available databases, using “vitamin D and lupus/SLE” as keywords. The relevant interventional trials published over the last decade have been considered and the results are reported here. Conclusion: Several immune cells express vitamin D receptors. Thus, an immunomodulatory role for vitamin D in lupus is plausible. Numerous observational studies have investigated the relationship between vitamin D levels and clinical/serological manifestations of SLE with contrasting results. Negative correlations between vitamin D levels and disease activity, fatigue, renal and cardiovascular disease, and anti-dsDNA titres have been described but not conclusively accepted. In experimental models of lupus, vitamin D supplementation can improve the disease. Interventional trials have assessed the potential therapeutic value of vitamin D in SLE, but further larger studies are needed.

Vitamin D receptor gene FokI variant in diabetic foot ulcer and its relation with oxidative stress

Gene ◽  
2017 ◽  
Vol 599 ◽  
pp. 87-91 ◽  
Author(s):  
Negin Soroush ◽  
Mania Radfar ◽  
Armita Kakavand Hamidi ◽  
Mohammad Abdollahi ◽  
Mostafa Qorbani ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Vitamin D ◽  
Vitamin D Receptor ◽  
Diabetic Foot ◽  
Receptor Gene ◽  
Foot Ulcer ◽  
Diabetic Foot Ulcer ◽  
Vitamin D Receptor Gene

Role of Vitamins in Neurodegenerative Diseases: A Review

2021 ◽  
Vol 20 ◽  
Author(s):  
Ravi Ranjan Kumar ◽  
Lovekesh Singh ◽  
Amandeep Thakur ◽  
Shamsher Singh ◽  
Bhupinder Kumar
Keyword(s):  
Oxidative Stress ◽  
Alzheimer’S Disease ◽  
Vitamin D ◽  
Vitamin C ◽  
Huntington's Disease ◽  
Huntington’S Disease ◽  
Vitamin D Deficiency ◽  
Neurological Disorders ◽  
The Brain

Background: Vitamins are the micronutrients required for boosting the immune system and managing any future infection. Vitamins are involved in neurogenesis, a defense mechanism working in neurons, metabolic reactions, neuronal survival, and neuronal transmission. Their deficiency leads to abnormal functions in the brain like oxidative stress, mitochondrial dysfunction, accumulation of proteins (synuclein, Aβ plaques), neurodegeneration, and excitotoxicity. Methods: In this review, we have compiled various reports collected from PubMed, Scholar Google, Research gate, and Science direct. The findings were evaluated, compiled, and represented in this manuscript. Conclusion: The deficiency of vitamins in the body causes various neurological disorders like Alzheimer’s disease, Parkinson’s disease, Huntington's disease, and depression. We have discussed the role of vitamins in neurological disorders and the normal human body. Depression is linked to a deficiency of vitamin-C and vitamin B. In the case of Alzheimer’s disease, there is a lack of vitamin-B1, B12, and vitamin-A, which results in Aβ-plaques. Similarly, in Parkinson’s disease, vitamin-D deficiency leads to a decrease in the level of dopamine, and imbalance in vitamin D leads to accumulation of synuclein. In MS, Vitamin-C and Vitamin-D deficiency causes demyelination of neurons. In Huntington's disease, vitamin- C deficiency decreases the antioxidant level, enhances oxidative stress, and disrupts the glucose cycle. Vitamin B5 deficiency in Huntington's disease disrupts the synthesis of acetylcholine and hormones in the brain.

scholarly journals Vitamin D Deficiency Aggravates Hepatic Oxidative Stress and Inflammation during Chronic Alcohol-Induced Liver Injury in Mice

2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Chun-Qiu Hu ◽  
Qing-Li Bo ◽  
Lan-Lan Chu ◽  
Yong-Di Hu ◽  
Lin Fu ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Vitamin D ◽  
Liver Injury ◽  
Vitamin D Deficiency ◽  
Chronic Alcohol ◽  
Cytokines And Chemokines ◽  
Hepatic Oxidative Stress ◽  
Oxide Synthase ◽  
Etoh Group ◽  
Inducible Nitric Oxide

Vitamin D deficiency has been reported in alcoholics. This study is aimed at evaluating the effects of vitamin D deficiency on chronic alcohol-induced liver injury in mice. Mice were fed with modified Lieber-DeCarli liquid diets for 6 weeks to establish an animal model of chronic alcohol-induced liver injury. In the VDD+EtOH group, mice were fed with modified diets, in which vitamin D was depleted. Vitamin D deficiency aggravated alcohol-induced liver injury. Furthermore, vitamin D deficiency aggravated hepatocyte apoptosis during alcohol-induced liver injury. Although it has a little effect on hepatic TG content, vitamin D deficiency promoted alcohol-induced hepatic GSH depletion and lipid peroxidation. Further analysis showed that vitamin D deficiency further increased alcohol-induced upregulation of hepatic inducible nitric oxide synthase (inos), two NADPH oxidase subunits p47phox and gp91phox, and heme oxygenase- (HO-) 1. By contrast, vitamin D deficiency attenuated alcohol-induced upregulation of hepatic antioxidant enzyme genes, such as superoxide dismutase (sod) 1 and gshpx. In addition, vitamin D deficiency significantly elevated alcohol-induced upregulation of hepatic proinflammatory cytokines and chemokines. Taken together, these results suggest that vitamin D deficiency aggravates hepatic oxidative stress and inflammation during chronic alcohol-induced liver injury.

The Role of Vitamin D and the Vitamin D Receptor in Bone Oncology

2018 ◽  
Vol 27 (03) ◽  
pp. 129-134 ◽  
Author(s):  
B. M. Holzapfel ◽  
F. Jakob ◽  
A. A. Kurth ◽  
G. Maier ◽  
K. Horas
Keyword(s):  
Vitamin D ◽  
Cancer Cells ◽  
Vitamin D Deficiency ◽  
Vitamin D Receptor ◽  
Molecular Mechanisms ◽  
Full Range ◽  
Cancer Cell Growth ◽  
The Past ◽  
Global Health Problem

SummaryVitamin D deficiency is a global health problem of enormous and increasing dimensions. In the past decades, numerous studies have centered on the role of vitamin D in the pathogenesis and course of many diseases including several types of cancer. Indeed, vitamin D has been widely acknowledged to be involved in the regulation of cell proliferation, differentiation and apoptosis in numerous cancer cells. While the full range of molecular mechanisms involveld in cancer cell growth and progression remains to be elucidated, recent research has deepened our understanding of the processes that may be affected by vitamin D or vitamin D deficiency.In this review, we consider the properties of bone that enable cancer cells to grow and thrive within the skeleton, and the role of vitamin D and the vitamin D receptor in the process of primary and secondary cancer growth in bone.

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