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Zinc is an essential micronutrient that participates in a multitude of cellular and biochemical processes. It is indispensable for normal growth and the maintenance of physiological functions. As one of the most significant trace elements in the body, zinc fulfills three primary biological roles: catalytic, structural, and regulatory. It serves as a cofactor in over 300 enzymes, and more than 3000 proteins require zinc, underscoring its crucial role in numerous physiological processes such as cell division and growth, immune function, tissue maintenance, as well as synthesis protein and collagen synthesis. Zinc deficiency has been linked to increased oxidative stress and inflammation, which may contribute to the pathogenesis of a multitude of diseases, like neurological disorders and cancer. In addition, zinc is a key constituent of zinc-binding proteins, which play a pivotal role in maintaining cellular zinc homeostasis. This review aims to update and expand upon the understanding of zinc biology, highlighting the fundamental roles of zinc in biological processes and the health implications of zinc deficiency. This work also explores the diverse functions of zinc in immune regulation, cellular growth, and neurological health, emphasizing the need for further research to fully elucidate the therapeutic potential of zinc supplementation in disease prevention and management. [ABSTRACT FROM AUTHOR]

Autism spectrum disorder (ASD) is a heterogeneous and complex group of life-long neurodevelopmental disorders. How this clinical condition impacts an individual's intellectual, social and emotional capacities, contributing to alterations in the proprioceptive and sensory systems and increasing their selective attitude towards food, is well described in the literature. This complex condition or status exposes individuals with ASD to an increased risk of developing overweight, obesity and non-communicable diseases compared with the neurotypical population. Moreover, individuals with ASD are characterised by higher levels of inflammation, oxidative stress markers and intestinal dysbiosis. All these clinical features may also appear in zinc deficiency (ZD) condition. In fact, zinc is an essential micronutrient for human health, serving as a structural, catalytic and regulatory component in numerous physiological processes. The aim of this narrative review is to explore role of ZD in ASD. Factors affecting zinc absorption, excretion and dietary intake in this vulnerable population are taken into consideration. Starting from this manuscript, the authors encourage future research to investigate the role of ZD in ASD. The perspective is to potentially find another missing piece in the 'ASD clinical puzzle picture' to improve the health status of these individuals. [ABSTRACT FROM AUTHOR]

It has been shown that the studied variants of bread wheat plants are resistant to zinc deficiency in the substrate. Various ways of adaptation to these conditions by the antioxidant system have been discovered in plants that have a functional allele of the GPC-B1 gene. Thus, in plants of line 15-7-1, the maintenance of the redox balance of cells is associated with an increase in the expression of the Cu/ZnSOD gene and a decrease in the expression of the FeSOD and CAT1 genes, whereas in plants of line 13-3, in addition to an increase in the transcripts content of the Cu/ZnSOD gene, it is associated with a high constitutive activity of superoxide dismutase (SOD) and catalase (CAT). The data obtained can be used to create wheat varieties (lines) capable of producing seeds with a relatively high content of zinc under zinc deficiency in the soil. [ABSTRACT FROM AUTHOR]

Background/Objectives: Zinc supplementation induces metallothionein, leading to reduced serum copper levels. Conversely, serum copper concentrations tend to rise with the use of HIF-PH inhibitors. Methods: To establish a safe level of zinc supplementation that avoids copper deficiency, serum copper and zinc concentrations measured every three months were retrospectively analyzed over five years in 50 patients undergoing hemodialysis. Results: At the initiation of the study, the median (IQR) concentrations were 100 (84.25–109) µg/dL for serum copper and 60.5 (50.5–70) µg/dL for serum zinc. All participants without zinc supplementation exhibited zinc deficiency (<80 µg/dL). After three months, copper deficiency (<71 µg/dL) was observed when serum copper concentrations were <98.6 µg/dL for patients with HIF-PH inhibitors and <90.3 µg/dL for patients without them. Reduced zinc supplementation may be necessary when serum copper falls below 90 µg/dL. Zinc levels remained deficient because supplementation was limited due to concerns about copper deficiency. Lowering the target zinc level to around 80 µg/dL instead of the conventional 80–120 µg/dL may be safer. Conclusions: Regular monitoring of both copper and zinc levels, taking place at least every three months, is recommended to adjust zinc supplementation, especially in patients on HIF-PH inhibitors. Copper supplementation should also be considered alongside zinc supplementation to effectively treat hypozincemia. [ABSTRACT FROM AUTHOR]

With its high protein, vitamin and mineral content, Spirulina platensis (SP) is the most widely used microalgae as a food supplement and the most cultivated microalgae for this purpose. Zinc is a regulatory microelement that is incorporated into the structure of many proteins in the cell and is particularly deficient in cereal-based societies. Due to the high adaptability of SP to environments with high metal concentrations and its high capacity to secrete substances called phytochelatin and metal-binding capacity, in this study zinc-enriched SP (ZnSP) was produced by binding metals to SP by organic means. For this purpose, modified media with 4 different Zn concentrations were prepared and SP was cultured in these media. Optical density, chlorophyll-a, phycobiliprotein and dry cell weight analyses were performed to monitor the culture. During the culture period, biomass and filtered culture medium were collected from logarithmic and stationary stages and Zn analyses were performed. The most suitable culture medium and growth conditions were determined to obtain Zn-enriched SP. 338.4 mg kg-1 Zn was measured in SP biomass grown in Zn-3 medium containing 8 mg L-1 Zn. It may be possible to obtain Zn-enriched SP in this medium and under the specified culture conditions, and even this ratio can be increased by adding Zn to the culture medium after the logarithmic stage.

Through diverse roles, zinc determines a greater number of critical life functions than any other single micronutrient. Beyond the well-recognized importance of zinc for child growth and resistance to infections, zinc has numerous specific roles covering the regulation of glucose metabolism, and growing evidence links zinc deficiency with increased risk of diabetes and cardiometabolic disorders. Zinc nutriture is, thus, vitally important to health across the life course. Zinc deficiency is also one of the most common forms of micronutrient malnutrition globally. A clearer estimate of the burden of health disparity attributable to zinc deficiency in adulthood and later life emerges when accounting for its contribution to global elevated fasting blood glucose and related noncommunicable diseases (NCDs). Yet progress attenuating its prevalence has been limited due, in part, to the lack of sensitive and specific methods to assess human zinc status. This narrative review covers recent developments in our understanding of zincs role in health, the impact of the changing climate and global context on zinc intake, novel functional biomarkers showing promise for monitoring population-level interventions, and solutions for improving population zinc intake. It aims to spur on implementation of evidence-based interventions for preventing and controlling zinc deficiency across the life course. Increasing zinc intake and combating global zinc deficiency requires context-specific strategies and a combination of complementary, evidence-based interventions, including supplementation, food fortification, and food and agricultural solutions such as biofortification, alongside efforts to improve zinc bioavailability. Enhancing dietary zinc content and bioavailability through zinc biofortification is an inclusive nutrition solution that can benefit the most vulnerable individuals and populations affected by inadequate diets to the greatest extent.

It is estimated that billions of people around the world are affected by micronutrient deficiencies. Madagascar is considered to be particularly nutritionally vulnerable, with nearly half of the population stunted, and parts of the country facing emergency, near famine-like conditions (IPC4). Although Madagascar is generally considered among the most undernourished of countries, empirical data in the form of biological samples to validate these claims are extremely limited. Our research drew data from three studies conducted between 2013-2020 and provided comprehensive biomarker profile information for 4,710 individuals from 30 communities in five different ecological regions during at least one time-point. Estimated prevalences of nutrient deficiencies and inflammation across various regions of rural Madagascar were of concern for both sexes and across all ages, with 66.5% of the population estimated to be deficient in zinc, 15.6% depleted in vitamin B12 (3.6% deficient), 11.6% deficient in retinol, and lower levels of iron deficiency (as indicated by 11.7% deficient in ferritin and 2.3% deficient assessed by soluble transferrin receptors). Beyond nutrient status biomarkers, nearly one quarter of the population (24.0%) exhibited chronic inflammation based on high values of α-1-acid glycoprotein, and 12.3% exhibited acute inflammation based on high values of C-reactive protein. There is an 8-fold difference between the lowest and highest regional observed prevalence of vitamin B12 deficiency, a 10-fold difference in vitamin A deficiency (based on retinol), and a 2-fold difference in acute inflammation (CRP) and deficiencies of zinc and iron (based on ferritin), highlighting strong geographical variations in micronutrient deficiencies across Madagascar.

AbstractPotato is an important vegetable crop as well as the most important staple food crop in India after rice and wheat. Being one of the cheapest sources of energy rich natural nutritive foods, potato contains several antioxidant in minute quantities. Potato is highly sensitive to Zn deficiency and the yield and quality of tuber is affected in Zn deficient soils. Establishing the critical limit of Zn in soil and plant is highly essential for optimizing the Zn fertilization dose. Therefore, the present study was conducted to evaluate the critical limit of Zn in soil and plant. To assess the critical limit of Zn, four graded doses of Zn was administered in the form of ZnSO4.7H2O like Zn0: 0 kg Zn ha−1, Zn5.0: 5 kg Zn ha−1, Zn10.0: 10 kg Zn ha−1 and Zn20.0: 20 kg Zn ha−1. The result indicated Zn concentration below 0.49 mg kg−1 in soil showed Zn deficiency while the Zn concentration below 7.0 mg kg−1 would indicate deficiency of Zn in potato tuber in respect of yield and quality of potato. Similarly, the critical concentration of Zn in potato shoot was found to be 32.7 mg kg−1 (average of values determined by both graphical and statistical method). Below this concentration, it was considered to be deficiency of Zn in potato shoot which can influence yield and quality of potato. Moreover, the application of Zn @ 20.0 kg ha−1 showed higher response to biomass yield of potato and may be recommended for quality tuber production. [ABSTRACT FROM AUTHOR]

Seed priming and foliar application of zinc on rice relies on higher contact and lesser application as new strategies enhances rice growth and development (quantitatively and qualitatively) in both normal and stress conditions. An open-air pot three factor-factorial experiment was conducted on a randomized complete block design with three replications to explore the effect of two aforementioned fertilizer application methods on morphological and physiological traits of Hashemi cultivar during 2021-2022 rice growing seasons. The applied experimental factors were: Nutripriming with zinc sulfate (5g.L-1 ) for 6, 12, and 24 hours, and control; soil types at two levels (less and more than Zn critical level (2 mgkg-1 ), and foliar application of 0.05% solution from amino acid chelate zinc source at maximum tillering, booting and ripening stages. The results clearly showed that the rice grain yield was increased through co-application of nutripriming with zinc sulfate (5g.L-1 ) for 6 hours and foliar application of 0.05% solution from amino acid chelate zinc source at maximum tillering, booting and ripening stages by about 1.78 and 1.39 times compared to control 1 (soil 1) and control 2 (soil 2), respectively. With similar trend, the aforementioned combined treatments increased the straw yield by an average of 30% and the grain and straw zinc content by about 1.8 times and 99.25%, and 1.8 times and 46.45%. [ABSTRACT FROM AUTHOR]

Maternal nutrition, including the availability of micronutrients such as zinc, influences the health of the offspring. Using Drosophila melanogaster, we studied the impact of zinc deficiency on development and reproduction, as well as the effects of maternal zinc status on the offspring's expression of zinc transporters across F1 to F3 generations. Zinc deficiency was induced by adding N,N,N′,N′-Tetrakis (2-pyridylmethyl)-ethylenediamine (TPEN) to the diet on which the eggs representing the F0 generation flies were laid. Then, virgin F0 females were mated with control males to produce F1, and subsequently thereafter to generate F2 and F3. Offspring from F1 to F3 were analyzed for body zinc status and zinc transporter mRNA levels. We found that zinc deficiency significantly (p < 0.05) impaired the development of flies, as evidenced by a reduced eclosion rate of zinc-deficient flies. Similarly, zinc deficiency significantly (p < 0.05) reduced the egg-laying rate in F0 flies, highlighting its impact on reproductive functions. Also, zinc levels were consistently lower in the F0 and persisted in subsequent generations for both male and female offspring, indicating transgenerational alterations in zinc status. Furthermore, gene expression analysis revealed significant (p < 0.05) variations in the mRNA levels of dZip42C.1, dZnT63C, dZip71B, and dZnT35C genes across different generations and between male and female offspring. These findings indicate gender-specific dynamics of gene expression in response to zinc deficiency, suggesting potential regulatory mechanisms involved in maintaining zinc homeostasis. Our study emphasizes the detrimental effects of zinc deficiency on development and reproduction in Drosophila and highlights potential implications for offspring and human health. [ABSTRACT FROM AUTHOR]

Maple syrup urine disease (MSUD) is a rare autosomal-recessive inborn error of branched-chain amino acid (BCAA) metabolism. It is caused by enzymatic defect in the metabolic pathway of branched chain amino acids (leucine, isoleucine, valine) which leads to accumulation of BCAAs and corresponding keto acids in plasma, urine, and cerebrospinal fluid. The incidence of MSUD is approximately 1 in 185,000 worldwide. We present an infant with MSUD developed cutaneous lesions while on dietary treatment. 4 months old male baby was brought to hospital with complaints of excessive cry, poor feeding, failure to thrive. Initial biochemical investigations showed metabolic acidosis, normoglycemia, and ammonia was 65 μmol/L, and lactate was 2.7mmol/. Serum electrolytes, renal function tests were normal. CSF analysis was normal. Cutaneous examination revealed well defined erythematous patches over perianal area extending onto intergluteal cleft posteriorly, groins, and scrotum anteriorly. Multiple discrete erythematous macules and patches present over upper limbs, retro auricular areas, Hemorrhagic crusts were present at both upper lips and lower lips. These skin lesions developed few days after initiation of MUSD diet. [ABSTRACT FROM AUTHOR]

High sodium intake influences the development of chronic kidney disease (CKD). Various factors can influence sodium consumption, one of which is impaired taste perception. This study aims to evaluate factors influencing taste disorders and the impact of high intake of sodium, saliva, and zinc, especially in CKD patients. The method used involved searching for articles using Google Scholar, PubMed, EBSCO, and ProQuest search engines. The inclusion, exclusion criteria, and journal selection method, using Problem/Population, Intervention, Comparison, Outcome form and Prisma Flow Diagram, focused on experimental studies in the last ten years (2013-2023) with specific search keywords. A total of 28 suitable articles matched the criteria. The results revealed three sub-themes: (A) Factors affecting sodium intake: Taste disorder/dysgeusia in CKD, (B) Effect of zinc on sodium intake or CKD, and (C) Effect of sodium on CKD. This study discusses the three most significant factors that influence taste distortion: salt intake, saliva quality, and zinc deficiency, besides old age. Taste disorders due to old age can be overcome with education and behavior planning. The habit of high sodium intake and saliva quality can be improved by reducing sodium intake, while the management of zinc deficiency is addressed through supplementation. In summary, tasting disorders in CKD are strongly influenced by high intake of sodium, saliva, and zinc deficiency. [ABSTRACT FROM AUTHOR]

The study was designed to investigate the effects of dietary zinc deficiency and supplementation on antioxidant system viz. superoxide-dismutase, glutathione reductase, glutathione peroxidase, glutathione- S-transferase, catalase and sulfhydryls levels (GSH, TSH, NPSH and PBSH) in testes of Wistar rats. Pre-pubertal rats were divided into two groups with 6 sub-groups each viz. zinc control (ZC), pair fed (PF), zinc deficient (ZD), zinc control supplementation (ZCS), pair-fed supplementation (PFS) and zinc deficient supplementation (ZDS). Experiments were set for 2- and 4-weeks followed by 4 weeks of zinc supplementation. The zinc deficient group animals exhibited significant decrease in gonado-somatic index (2- and 4- weeks), sulfhydryls levels, GSH, GPx, GR (2 and 4-weeks) and GST concentration (2-weeks). However, after zinc supplementation significant improvement in gonadosomatic index, SH, GSH, antioxidant enzyme levels (GR, GPx, and GST) in deficient groups has been observed. Zinc deficiency during pre-pubertal period affected growth and caused dysregulation of the glutathione antioxidant system. The significant alterations in the levels of antioxidant enzymes and non-enzymatic antioxidant system (GSH and SH) in zinc deficient groups could be due to alleviated generation of free radicals, causative factor for increased oxidative stress which may lead to infertility as oxidative stress is a common pathology seen during infertility. Altered antioxidant system and sulfhydryls levels in testes due to dietary zinc deficiency reflect the significance of optimum zinc for maintaining homeostatic balance in gonadal physiology. Supplementing zinc for 4 weeks could reduce the redox imbalance which may help in alleviating oxidative stress induced alterations in testes. [ABSTRACT FROM AUTHOR]

Extracellular hydrolysis of the phosphate esters of B vitamins (B1, B2, and B6) is crucial for their cellular uptake and metabolism. Although a few zinc‐dependent enzymes have been implicated in these processes, their exact mechanisms of action remain largely unknown. This study investigated the potential involvement of phosphate group hydrolyzing enzymes in the hydrolysis of B vitamin phosphate esters. We evaluated enzyme activity in membrane lysates prepared from cells transiently transfected with these enzymes or those endogenously expressing them. Specifically, we investigated how zinc deficiency affects the rate of hydrolysis of B vitamin phosphate esters in cellular lysates. Assessment of the activities of zinc‐dependent ectoenzymes in the lysates prepared from cells cultured in zinc‐deficient conditions and in the serum of rats fed zinc‐deficient diets revealed that zinc deficiency reduced the extracellular hydrolysis activity of B vitamin phosphate esters. Furthermore, our findings explain the similarities between several symptoms of B vitamin and zinc deficiencies. Collectively, this study provides novel insights into the diverse symptoms of zinc deficiency and could guide the development of appropriate clinical strategies. [ABSTRACT FROM AUTHOR]

Mineral micronutrient deficiencies are widespread in global food systems and can affect plant growth, crop quality, and human and livestock health. The mapping of soils and soil properties linked to micronutrient supply in food systems is now enabling us to better understand the linkages between soil health and function and its relationship with food quality and human health. Zinc (Zn) deficiencies in Indian soils are of particular concern in the context of crop yields and food quality. This current review aims to understand the data landscapes on soil Zn and related soil properties in India, with a particular focus on three states: Uttar Pradesh (UP), Bihar, and Odisha. The scope of the review is to identify and describe data sets from national and state-wide programmes and research experiments in which soil Zn has been reported, which could be used to provide a framework for integrated surveys and would combine wider agriculture, food systems, nutrition, and public health sectors. The largest data set on soil Zn was collected under a soil health management (SHM) programme, during which the Indian government analysed more than 30 million soil samples for Zn concentration (mg/kg) from 2015 to 2019. This study showed that 39% of Indian soils are considered Zn deficient for crop production (i.e., based on a threshold of <0.6 mg/kg); soil Zn deficiency varied from 2% to 67% across different Indian states. From this survey, soil Zn deficiency was 29%, 67%, and 48% in UP, Bihar, and Odisha, respectively. Individual data points are available for re-use at the Government of India soil health card website (https://www.soilhealth.dac.gov.in/). In addition, the All India Coordinated Research Project on Micro and Secondary Nutrients and Pollutant Elements in Soils and Plants (AICRP-MSPE) programme under the Indian Council of Agricultural Research (ICAR) analysed >240,000 soil samples from 2012 to 2018 from 28 states of India and reported ~38% soil Zn deficiency in the Indian soils. There is no programme in India that currently maps micronutrients in soil and crops together using "GeoNutrition" approaches recently reported in two countries in Africa, Ethiopia, and Malawi. Future co-ordinated soil and crop micronutrient mapping in India can help us to understand better the movement of Zn (and other micronutrients) in food systems and to inform strategies to improve the Zn status in the soil, e.g., the use of Zn fertilisers for yield and agronomic biofortification, and in the edible tissues of crops, e.g., through genetic biofortification. [ABSTRACT FROM AUTHOR]

Background: Alcohol use disorder (AUD) with chronic and heavy alcohol consumption causes alcohol‐associated liver disease (ALD). Early‐stage ALD exhibits dyshomeostasis of zinc. We investigated the role of zinc deficiency in gut‐barrier dysfunction, proinflammatory response, hepatocyte injury, and death, as well as potential sex differences in AUD patients. Methods: Thirty‐nine male and female AUD patients were grouped by normal [≥71 μg/dL (Group 1, number (n) = 26)] and low [<71 μg/dL (Group 2, n = 13)] serum zinc levels. Demographics, alcohol intake markers [Lifetime Drinking History (LTDH), heavy drinking days in the past 90‐days (HDD90), total drinks in the past 90‐days (TD90), number of drinking days in the past 90‐days (NDD90), average drinks per day in the past 90 days (AvgDPD90)] were collected. Blood samples were tested for complete blood count (CBC), comprehensive metabolic panel (CMP), coagulation markers, gut‐barrier dysfunction markers, cytokines, and hepatocyte death markers. Results: Group 2 females exhibited lower LTDH than Group 2 males (p = 0.028), but higher recent drinking. Aspartate transaminase: alanine transaminase (AST:ALT) ratio was higher (p = 0.049) in Group 2 males compared to Group 1 males. Overall, Group 2 showed threefold higher interleukin 8 (IL‐8) levels than Group 1 (p = 0.92); these were sevenfold higher in Group 2 females than Group 1 females. Group 2 females also had higher K18M65, but lower K18M30 than Group 1 females. Necrotic type of cell death (K18M65) was well‐described only in Group 2 by the arrangement of lipopolysaccharide (LPS), soluble cluster of differentiation 14 (sCD14), and tumor necrosis factor alpha (TNF‐α) (R2 = 0.633, p = 0.037). Conclusion: Our findings demonstrated the role of the gut‐immune‐liver axis in describing hepatocyte injury and death in zinc‐deficient AUD patients. These patients represented an arrangement of gut‐barrier dysfunction and an exacerbated immune response. Shift in the cell‐death mechanism from apoptosis in zinc‐replete females to necrosis in zinc‐deficient females suggests a subclinical to clinical transition of ALD associated with zinc status. [ABSTRACT FROM AUTHOR]

Background: Picky eating is a common feeding disorder in early childhood, characterized by a refusal to eat familiar foods or try new ones. This disorder can lead to nutritional deficiencies as well as impacting growth and development. The study aimed to determine whether picky eating is related to low serum zinc levels and growth in southern Jordan. Methods: Data collection was based on history taking and the physical examination of all examined patients at the pediatric clinic of Al-Karak Teaching Hospital. The collected data included hair loss, other signs of zinc deficiency, weight for age (Z-score), income category of the family, and the presence of underlying diseases. Blood levels of zinc, vitamin D, ferritin and hemoglobin were determined, and the results were analyzed statistically using ANOVA and t-tests. Results: An association was found between low serum zinc levels and low weight for age Z-scores, confirming the relationship between zinc deficiency and underlying general nutritional deficiencies, such as celiac disease and acrodermatitis enteropathica, which were rare (4 out of 118 studied cases); however, these patients had severely low serum zinc levels compared to the nutritional causes. On the other hand, the income category of the patient’s family could not reliably predict low serum zinc levels. Conclusion: Picky eating is associated with lower weight for age, hemoglobin levels, and vitamin D levels, thereby suggesting that picky eating can lead to a wide range of nutritional deficiencies beyond just zinc deficiency. [ABSTRACT FROM AUTHOR]

"Double scale" is a poorly characterized skin defect of crocodilians that drastically reduces the economic value of crocodilian skin. This study investigated the morphology and pathogenesis of double scale in a ranching farm of American alligators (Alligator mississippiensis). We compared the histopathology of skin and selected organs (liver, lung, kidney, heart, spleen, intestine, and brain) of alligators with double scale against healthy control animals, together with serum and liver vitamin and mineral levels. Skin affected with double scale had statistically significant hyperkeratosis, epidermal atrophy, and increased basal cell degeneration compared with control alligators (P <.0001). Interestingly, all alligators with double scale had varying degrees of hepatic fibrosis. Feed analysis showed that alligators that had double scale and hepatic fibrosis had prolonged dietary exposure to high levels of vitamin A, iron, and copper. Serum analysis indicated that levels of zinc (p <.0001), copper (P <.05), and vitamin E (P <.002) were significantly lower in alligators with hepatic fibrosis and double scale compared with controls. Finally, immunohistochemical analysis of skin with double scale showed a marked reduction in immunolabeling with the zinc-binding protein metallothionein. These results suggest that zinc deficiency, in combination with other micronutrient anomalies, may play a role in the pathogenesis of double scale in alligators with liver fibrosis. [ABSTRACT FROM AUTHOR]

BackgroundOligodendrocytes are responsible for myelin production in the central nervous system (CNS). Hypomyelination may slow saltatory nerve signal conduction and affect motor performance and behavior in adults. Gestational marginal zinc deficiency in rats significantly decreases proliferation of neural stem cells (NSCs) in the offspring brain.ObjectivesGiven that NSCs are precursors of oligodendrocytes, this study investigated if marginal zinc deficiency during early development in rats affects oligodendrogenesis in the offspring's CNS.MethodsRat dams were fed an adequate (25 μg zinc/g diet) (C) or a marginal zinc diet (MZD) (10 μg zinc/g diet), from gestation day zero until postnatal day (P) 20, and subsequently all offspring was fed the control diet until P60. Oligodendrogenesis was evaluated in the offspring at P2, P5, P10, P20, and P60, by measuring parameters of oligodendrocyte progenitor cells (OPCs) proliferation, differentiation, maturation, and of myelination.ResultsThe expression of 1) proteins that regulate OPC proliferation (Shh, Sox10, Olig2); 2) OPC markers (NG2, PDGFRα); 3) myelin proteins (MBP, MAG, MOG, PLP) were lower in the brain cortex from MZD than C offspring at various stages in development. The amount of myelin after zinc replenishment continued to be low in the MZD young adult at P60. Accordingly, parameters of motor performance and behavior [grip strength, rotarod, elevated T-maze (ETM), and open-field tests] were impaired in the MZD offspring at P60.ConclusionsResults support the concept that maternal and early postnatal exposure to MZD affects oligodendrogenesis causing long-lasting effects on myelination and on motor performance in the young adult offspring.

Both microplastic (MP) pollution and zinc (Zn) deficiency have adverse effects on terrestrial plants. However, the combined effect of MPs and Zn deficiency on plant physiology remains unexplored. In this study, a pot-culture experiment and 13C stable isotope tracing technology were employed to investigate the combined effects of MPs and Zn deficiency on the growth, photosynthetic physiology and chlorophyll fluorescence characteristics, as well as synthesis and distribution of photosynthetic products in Malus hupehensis (Pamp.) Rehd seedlings. The results revealed significant reductions in biomass, gas exchange parameters, carbohydrate metabolism enzyme activities, and photosynthetic parameters including Fv/Fm, ΦPSII, ETR and qp in seedlings subjected to both individual and joint treatments of MPs and Zn deficiency compared to the control group. Notably, the combined Zn deficiency and MPs exhibited a more pronounced inhibitory effect on root biomass (RR = −0.42) compared to the single Zn deficiency (RR = −0.37) and MP (RR = −0.26) treatments. Random forest analysis indicated that chlorophyll fluorescence characteristics (37.5 %) had the greatest impact on biomass variation in seedlings, followed by 13C accumulation in various organs (26.7 %). MPs exacerbated the inhibition of photosynthesis (Pn and Gs) under Zn deficiency by suppressing chlorophyll fluorescence parameters (Fv/Fm and ΦPSII), further reducing 13C accumulation in roots. In conclusion, the addition of MPs intensified the suppression of photosynthetic parameters caused by Zn deficiency, weakened the carbon assimilation capacity of leaves, and hindered the synthesis of photosynthetic products in leaves and their transport to roots, thereby further inhibiting root growth. This study reveals the combined stress of MP pollution and Zn deficiency on terrestrial plants, deepens our understanding of potential ecological risks, and provides scientific basis for the development of effective mitigation measures to protect plant ecosystems.

Background: Zinc deficiency is common in the Paediatric age group but the extent of this disorder is unknown in HIV infected children in Nigeria prompting this study. Objective: To determine the prevalence of zinc deficiency in HIV seropositive children, and compare this with age and sex matched controls. Methods: A case control study of 70 HIV sero-positive and age and sex matched HIV sero-negative children was carried out in the University of Port Harcourt Teaching Hospital between 1st of June, 2009 and 31st of May, 2010. We collected demographic, clinical, haematological and biochemical parameters from cases and controls, and analysed these using SPSS 20. Results: Sixty percent of the subjects were zinc deficient as against 41.4% of the controls, p= 0.028. Subjects that were zinc deficient were more likely to be in higher HIV disease stages, p = 0.003, in lower socio-economic classes and aged less than 60 months. We conclude that there is a high prevalence of zinc deficiency in HIV sero-positive children and they should have zinc supplementation immediately they are diagnosed to reduce their morbidity and mortality.

Background: Although relatively abundant in nature, zinc deficiency is one of the most prevalent mineral micronutrient deficiencies, particularly in sub-Saharan Africa (SSA). However, there are limited data on zinc nutriture for children in the SSA region.Objective: A study was undertaken to review the available literature that reported the prevalence of zinc deficiency assessed using the three population-level indicators (plasma/serum zinc, dietary zinc intake and stunting) among children 0–59 months of age in SSA.Methods: A search combination of words was performed on PUBMED, Google Scholar, AGORA, ScienceDirect and SpringerLink databases. The following search terms were entered; “stunting OR low height for age AND serum zinc OR plasma zinc, AND dietary zinc intake AND under five AND Sub-Saharan Africa”.Results: We identified 25 studies. Two were randomised controlled trials and the rest were cross-sectional studies of which eight were national surveys. Nineteen studies from nine countries have assessed plasma or serum zinc. A total of 10 studies from 6 countries assessed dietary zinc intake. The prevalence of risk of zinc deficiency ranged from 20–83% using PZn/SZn, and 31–99% using inadequate dietary Zn intake, with the exception of one study that reported 8%.Conclusion: The risk of zinc deficiency among children aged between 0 and 59 months appears to be high and of public health concern. Stunting was the most commonly reported proxy indicator of zinc deficiency. When planning interventions, stakeholders should consider collecting appropriate biomarker data and design context-specific interventions.

Background/Objectives: We examined the frequency of zinc deficiency in patients with Sjögren's syndrome (SS) and the relationship between zinc deficiency and each of the subjective symptoms and disease activity. Methods: We enrolled 164 patients aged ≥ 20 years with primary SS (pSS) based on the revised diagnostic criteria of the Ministry of Health, Labor and Welfare (1999) and 144 patients with RA diagnosed according to the ACR/EULAR classification criteria for RA (2010) as a comparison group. Subjective symptoms were confirmed using an original questionnaire, and disease activity was determined using the European League Against Rheumatism Sjögren's Syndrome Disease Activity Index (ESSDAI). The serum zinc concentrations were measured in both SS and RA patients. Results: The rate of zinc deficiency in the SS group was 26.1%, significantly higher than that in the RA group (7.6%). The rate of zinc deficiency was significantly higher in the pSS group compared with Japanese health checkup recipients reported in the literature. The mean serum zinc concentration in primary SS was 60.6 ± 7.3 µmol/L in the high disease activity group with an ESSDAI of ≥5 points, which was significantly lower than the concentration of 69.7 ± 10.2 µmol/L in patients with an ESSDAI of ≤4 points. Conclusions: The frequency of zinc deficiency was higher in patients with pSS than in patients with RA. Disease activity was also higher in patients with zinc deficiency, suggesting an association between zinc concentration and organ involvement in pSS. [ABSTRACT FROM AUTHOR]

Diabetes mellitus is a global health problem and a major contributor to mortality and morbidity. The management of this condition typically involves using oral antidiabetic medication, insulin, and appropriate dietary modifications, with a focus on macronutrient intake. However, several human studies have indicated that a deficiency in micronutrients, such as zinc, can be associated with insulin resistance as well as greater glucose intolerance. Zinc serves as a chemical messenger, acts as a cofactor to increase enzyme activity, and is involved in insulin formation, release, and storage. These diverse functions make zinc an important trace element for the regulation of blood glucose levels. Adequate zinc levels have also been shown to reduce the risk of developing diabetic complications. This review article explains the role of zinc in glucose metabolism and the effects of its inadequacy on the development, progression, and complications of diabetes mellitus. Furthermore, it describes the impact of zinc supplementation on preventing diabetes mellitus. The available information suggests that zinc has beneficial effects on the management of diabetic patients. Although additional large-scale randomized clinical trials are needed to establish zinc's clinical utility further, efforts should be made to increase awareness of its potential benefits on human health and disease. [ABSTRACT FROM AUTHOR]

Background: Although patients with advanced pancreatic cancer (PC) often experience dysgeusia with zinc deficiency during chemotherapy, data on zinc supplementation for dysgeusia and its effects on nutritional status are scarce. We aimed to examine the efficacy of zinc supplementation in patients with advanced PC. Methods: Thirty-three patients with unresectable PC who presented with dysgeusia and zinc deficiency during chemotherapy and received zinc acetate hydrate between January 2018 and December 2022 were included. We evaluated the changes in serum zinc levels and the improvement in dysgeusia. Among the 26 patients who received zinc supplementation for 12 weeks, we also compared patient characteristics and changes in serum zinc and albumin levels between patients who showed improvement in dysgeusia (effective group) and those who did not (non-effective group). Results: The serum zinc level increased significantly after zinc supplementation (median: 60 µg/dL at baseline, 99.5 µg/dL at 4 weeks, 101 µg/dL at 8 weeks and 101 µg/dL at 12 weeks). The rate of improvement in dysgeusia increased over time (18.2% at 4 weeks, 33.3% at 8 weeks, and 42.4% at 12 weeks). Comparing the effective group and non-effective group revealed that while the median serum albumin level of the effective group did not change, the non-effective group showed a significant decrease from baseline to 12 weeks (3.2 g/dL to 3.0 g/dL, p = 0.03). Conclusion: Zinc supplementation significantly increased serum zinc levels, improving dysgeusia. Zinc supplementation might also contribute to maintaining nutritional status in patients with unresectable PC. [ABSTRACT FROM AUTHOR]

Background: Hypertension is one of the major etiologies that cause chronic kidney disease (CKD) and can exacerbate kidney dysfunction. Zinc is an essential trace element playing a role in blood pressure regulation, and zinc deficiency, a common comorbidity in patients with CKD, can cause hypertension. However, the precise mechanism underlying zinc deficiency-induced hypertension is unknown. Sodium (Na+) retention due to inappropriate Na+ reabsorption in the renal tubule is the principal pathophysiology of hypertension. Therefore, this study aimed to investigate the association between zinc deficiency and salt sensitivity. Methods: Adult mice were fed a zinc-adequate (ZnA) or zinc-deficient (ZnD) diet combined with/without high salt in drinking water (HS) for 4 weeks (n = 6 each). Changes in blood pressure, urinary sodium excretion, and the expressions of the proximal tubular Na+ transporter, Na+/H+ exchanger 3 (NHE3), which mostly contributes to filtered Na+ reabsorption and the downstream Na+–Cl− transporter (NCC) were analyzed. Results: Urinary Na+ excretion significantly increased in ZnD mice, indicating that zinc deficiency causes natriuresis. NHE3 expressions were significantly suppressed, whereas NCC was upregulated in ZnD mice. Interestingly, the combination of high salt and ZnD diet (HS-ZnD) reversed the urinary Na+ loss. The NCC remained activated and NHE3 expressions paradoxically increased in HS-ZnD mice compared with those fed the combination of high salt and ZnA diet. In addition, blood pressure significantly increased only in HS-ZnD mice. Conclusion: The combination of zinc deficiency and high salt causes hypertension. Zinc is associated with salt-sensitivity, potentially through NHE3 and NCC regulation. [ABSTRACT FROM AUTHOR]

Zinc, a crucial trace element is vital for the growth and development of humans. It is frequently described as 'the flower of life' and 'the source of intelligence'. Zinc supplements play a pivotal role in addressing zinc deficiency by serving as a vital source of this essential micronutrients, effectively replenishing depleted zinc levels in the body. In this paper, we first described the biological behavior of zinc in the human body and briefly described the physiological phenomena associated with zinc levels. The benefits and drawbacks of various zinc supplement forms are then discussed, with emphasis on the most recent zinc supplement formulations. Finally, the application of zinc supplements in food, medicine, and animal husbandry is further summarized. © 2024 Society of Chemical Industry. [ABSTRACT FROM AUTHOR]

Background and aims: The levels of reactive oxygen species (ROS) including superoxide anion radical (O2•−), hydrogen peroxide (H2O2) increase in plants under Zinc (Zn) deficiency stress. However, less is known about whether excessive levels of ROS mediate root development and growth under Zn deficient condition. Methods: Maize variety Zhengdan 958 was chosen to grow with nutrient solution culture with the treatments (DAT) of 0 and 1 μM Zn supply. Exogenous H2O2 and its scavenger (N, N-dimethylthiourea, DMTU), and a catalase inhibitor (Aminotriazole, AT) were added. The distribution of ROS in roots were detected by chemical staining and fluorescent probe technology. The differential expression of related genes and proteins in roots were analyzed through proteomics and transcriptomics approaches. Results: Zn deficiency stress caused high O2•−and H2O2 levels in roots and decreased crown root elongation. Exogenous addition of DMTU reduced the H2O2 content in roots and the inhibitory effect of Zn deficiency on root elongation. Under Zn supply, the addition of H2O2 and AT resulted in short crown roots. The down-regulation of several genes associated with cell wall extension, such as cellulose synthase, xyloglucan endtransglucosylase/hydrolase and beta expansin 8, were found in the transcriptome and proteome data of Zn-deficient root. Conclusion: It is suggested that H2O2 might be involve in the inhibition of crown root development in maize plants subjected to Zn deficiency stress, which may account for the down-regulation of genes related to cell wall extension through transcriptomic and proteomic analysis. [ABSTRACT FROM AUTHOR]

Zinc serves critical catalytic, regulatory, and structural roles. Hosts and their resident gut microbiota both require zinc, leading to competition, where a balance must be maintained. This systematic review examined evidence on dietary zinc and physiological status (zinc deficiency or high zinc/zinc overload) effects on gut microbiota. This review was conducted according to PRISMA (Preferred Reporting Items for Systematic reviews and Meta-Analyses) guidelines and registered in PROSPERO (CRD42021250566). PubMed, Web of Science, and Scopus databases were searched for in vivo (animal) studies, resulting in eight selected studies. Study quality limitations were evaluated using the SYRCLE risk of bias tool and according to ARRIVE guidelines. The results demonstrated that zinc deficiency led to inconsistent changes in α-diversity and short-chain fatty acid production but led to alterations in bacterial taxa with functions in carbohydrate metabolism, glycan metabolism, and intestinal mucin degradation. High dietary zinc/zinc overload generally resulted in either unchanged or decreased α-diversity, decreased short-chain fatty acid production, and increased bacterial metal resistance and antibiotic resistance genes. Additional studies in human and animal models are needed to further understand zinc physiological status effects on the intestinal microbiome and clarify the applicability of utilizing the gut microbiome as a potential zinc status biomarker. [ABSTRACT FROM AUTHOR]

Given the growing interest in the role of zinc in the onset and progression of diseases, there is a crucial demand for reliable methods to modulate zinc homeostasis. Using a dietary approach, we provide validated strategies to alter whole-body zinc in mice, applicable across species. For confirmation of zinc status, animal growth rates as well as plasma and urine zinc levels were evaluated. The accessible and cost-effective methodology outlined will increase scientific rigor, ensuring reproducibility in studies exploring the impact of zinc deficiency and repletion on the onset and progression of diseases. NEW & NOTEWORTHY: This methods paper details dietary approaches to alter zinc homeostasis in rodents and qualitative and quantitative methods to ensure the zinc status of experimental animals. The outlined accessible and cost-effective protocol will elevate scientific rigor, ensuring reproducibility in studies exploring the impact of zinc deficiency and repletion on the onset and progression of a multitude of health conditions and diseases. [ABSTRACT FROM AUTHOR]

Although relatively abundant in nature, zinc deficiency is one of the most prevalent mineral micronutrient deficiencies, particularly in sub-Saharan Africa (SSA). However, there are limited data on zinc nutriture for children in the SSA region. A study was undertaken to review the available literature that reported the prevalence of zinc deficiency assessed using the three population-level indicators (plasma/serum zinc, dietary zinc intake and stunting) among children 0–59 months of age in SSA. A search combination of words was performed on PUBMED, Google Scholar, AGORA, ScienceDirect and SpringerLink databases. The following search terms were entered; "stunting OR low height for age AND serum zinc OR plasma zinc, AND dietary zinc intake AND under five AND Sub-Saharan Africa". We identified 25 studies. Two were randomised controlled trials and the rest were cross-sectional studies of which eight were national surveys. Nineteen studies from nine countries have assessed plasma or serum zinc. A total of 10 studies from 6 countries assessed dietary zinc intake. The prevalence of risk of zinc deficiency ranged from 20–83% using PZn/SZn, and 31–99% using inadequate dietary Zn intake, with the exception of one study that reported 8%. The risk of zinc deficiency among children aged between 0 and 59 months appears to be high and of public health concern. Stunting was the most commonly reported proxy indicator of zinc deficiency. When planning interventions, stakeholders should consider collecting appropriate biomarker data and design context-specific interventions. [ABSTRACT FROM AUTHOR]

Mineral micronutrient deficiencies are widespread in global food systems and can affect plant growth, crop quality, and human and livestock health. The mapping of soils and soil properties linked to micronutrient supply in food systems is now enabling us to better understand the linkages between soil health and function and its relationship with food quality and human health. Zinc (Zn) deficiencies in Indian soils are of particular concern in the context of crop yields and food quality. This current review aims to understand the data landscapes on soil Zn and related soil properties in India, with a particular focus on three states: Uttar Pradesh (UP), Bihar, and Odisha. The scope of the review is to identify and describe data sets from national and state-wide programmes and research experiments in which soil Zn has been reported, which could be used to provide a framework for integrated surveys and would combine wider agriculture, food systems, nutrition, and public health sectors. The largest data set on soil Zn was collected under a soil health management (SHM) programme, during which the Indian government analysed more than 30 million soil samples for Zn concentration (mg/kg) from 2015 to 2019. This study showed that 39% of Indian soils are considered Zn deficient for crop production (i.e., based on a threshold of 240,000 soil samples from 2012 to 2018 from 28 states of India and reported ~38% soil Zn deficiency in the Indian soils. There is no programme in India that currently maps micronutrients in soil and crops together using “GeoNutrition” approaches recently reported in two countries in Africa, Ethiopia, and Malawi. Future co-ordinated soil and crop micronutrient mapping in India can help us to understand better the movement of Zn (and other micronutrients) in food systems and to inform strategies to improve the Zn status in the soil, e.g., the use of Zn fertilisers for yield and agronomic biofortification, and in the edible tissues of crops, e.g., through genetic biofortification.

Abstract Background Transient symptomatic zinc deficiency (TSZD), an acquired type of zinc deficiency, is a rare, but probably underrecognized disease, extremely in breastfed premature with low birthweight infants. Its clinical manefestations are similar to Acrodermatitis enteropathica (AE), which is a genetic zinc absorption disorder caused by SLC39A4 gene mutations. This gene encodes a member of the zinc/iron-regulated transporter-like protein (ZIP) family. The encoded protein localizes to cell membranes and is required for zinc uptake in the intestine. TSZD is often misdiagnosed as AE because of their extremely similar manefestations, characterized by a typical rash. Therefore, the differention between them is still a clinical challenging. Case presentation Here, we present a case of TSZD in a 4 month and 23 days female Chinese Yi-ethnic premature with AE-like skin lesions, mainly presenting periorificial, perianal and perineal crusted, eroded, erythemato-squamous eruption. Laboratory examination showed the patient’s blood zinc level was significantly decreased. Further sequencing of the SLC39A4 gene showed no mutation in the infant and her parents. Skin lesions significantly improved after 6 days of initial zinc supplementation (3 mg/kg/d), and maintenance treatment with 1 mg/kg/day of zinc was discontinued after 8 months without recurrence. Conclusions The clinical manifestations of TSZD and AE are extremely similar, leading to a high rate of clinical misdiagnosis. While genetic analysis of the SLC39A4 gene is a reliable method for differentiating TSZD from AE. It is recommended that SLC39A4 gene test should be performed as far as possible in children with AE-like rash.

Abstract Zinc (Zn) is a crucial trace element essential for human growth and development, particularly for reproductive health. Previous research has shown a decrease in serum zinc concentration with age and individuals with conditions such as polycystic ovary syndrome (PCOS) and diabetes mellitus. However, the specific effects of zinc deficiency on the female reproductive system, especially ovarian function, are not fully understood. In our study, we observed a significant reduction in the total number of follicles and mature follicles in the zinc deficiency group. This reduction correlated with decreased level of anti-Mullerian hormone (AMH) and abnormal gene expression affecting hormone secretion regulation. Furthermore, we found that zinc deficiency disrupted mitochondrial dynamics, leading to oxidative stress in the ovaries, which further inhibited autophagy and increased ovarian apoptosis. These changes ultimately resulted in the failure of germinal vesicle breakdown (GVBD) and reduced oocyte quality. Meanwhile, administration of zinc glycine effectively alleviated the oocyte meiotic arrest caused by dietary zinc deficiency. In conclusion, our findings demonstrated that dietary zinc deficiency can affect hormone secretion and follicle maturation by impairing mitochondrial function and autophagy.

Zinc deficiency during pregnancy is common and has been significantly associated with adverse pregnancy outcomes such as spontaneous preterm birth(PTB), recurrent abortion(RA), low birth weight(LBW), small-for-gestational-age infant(SGA), preeclampsia(PE), and gestational diabetes mellitus(GDM). Unfortunately, there is no specific biomarkers which are sensitive, easy-to-collect and detect available for the clinical evaluation of zinc nutritional status. However, recent studies have identified metallothionein and the ratio of oleic acid to dihydroxymethyl gamma-linolenic acid(LA/DGLA) as potentially candidates of biomarkers.This article focuses on summarizing and discussing the progress of domestic and international researches on zinc deficiency during pregnancy and adverse pregnancy outcomes, potential zinc biomarkers, and zinc deficiency treatments, aiming at providing ideas for perinatal nutritional guidance.

Acrodermatitis enteropathica is a rare disorder caused by zinc deficiency. The classic triad of symptoms includes perioral dermatitis, diarrhea, and alopecia. A rare cause of the acquired form is zinc deficiency due to total parenteral nutrition. Diagnosis can be challenging due to nonspecific symptoms. This paper presents a case of acrodermatitis enteropathica in a 5-month-old infant who had been on total parenteral nutrition since birth. Unlike the literature, the patient's clinical improvement was observed with zinc spray and zinc cream treatment. [ABSTRACT FROM AUTHOR]