Zinc as a Neuroprotective Nutrient for COVID-19-Related Neuropsychiatric Manifestations: A Literature Review

Sex distinctions regarding serum zinc levels in critically ill COVID-19 patients

PURPOSE

Men and women exhibit different presentations in COVID-19. Changes in zinc finger domains in X chromosome causes disorders of sex development. So, we aimed to evaluate sex distinctions regarding serum zinc in severe COVID-19.

METHOD

Data from electronic records of severe COVID-19 patients were correlated with serum zinc. Logistic regression investigated predictors and protectors of hypozincemia in men and women.

RESULTS

We assessed 188 medical records (men = 114, women = 74). Men correlated low zinc with hypertension (cc = 0.303, p < 0.001), diabetes (cc = 0.198, p = 0.031), hemoglobin (cc = -0.258, p = 0.005), and albumin (cc = -0.219, p = 0.027). Low lymphocyte count (cc = 0.315, p = 0.005), C-reactive protein (cc = -0.248, p = 0.037), and enteral nutrition (cc = 0.269, p = 0.016) were correlated with hypozincemia in women. Age correlated with low zinc in men (c = -0.304, p = 0.001) and women (cc = -0.298, p = 0.010). In men, hypertension (OR = 4.905, p = 0.005) and lymphopenia (OR = -0.999, p = 0.019) were low zinc predictors, while lung injury > 50% was a protective factor (OR = -0.280, p = 0.025). Lymphopenia (OR = -0.999, p = 0.005) and difficult weaning from mechanical ventilation (MV) (OR = 4.359, p = 0.036) were predictors of hypozincemia in women. Difficult weaning from MV (OR = 3.012, p = 0.003) and age (OR = 1.038, p = 0.002) were hypozincemia predictors regardless sex.

CONCLUSION

Hypertension, diabetes, hemoglobin and albumin were correlated with low zinc in men. Lymphopenia, reactive-C protein and enteral nutrition were correlated with low zinc in women. In men, hypertension and low lymphocytes were predictors of hypozincemia. Lymphopenia and difficult weaning from MV were predictors of low zinc in women.

Symptomatic Characteristics of Hypozincemia Detected in Long COVID Patients

OBJECTIVES

The aim of this study was to determine the characteristics of hypozincemia in long COVID patients.

METHODS

This study was a single-center retrospective observational study for outpatients who visited the long COVID clinic established in a university hospital during the period from 15 February 2021 to 28 February 2022. Characteristics of patients with a serum zinc concentration lower than 70 μg/dL (10.7 μmol/L) were compared with characteristics of patients with normozincemia.

RESULTS

In a total of 194 patients with long COVID after excluding 32 patients, hypozincemia was detected in 43 patients (22.2%) including 16 male patients (37.2%) and 27 female patients (62.8%). Among various parameters including the background characteristics of the patients and medical histories, the patients with hypozincemia were significantly older than the patients with normozincemia (median age: 50 vs. 39 years). A significant negative correlation was found between serum zinc concentrations and age in male patients (R = -0.39; p < 0.01) but not in female patients. In addition, there was no significant correlation between serum zinc levels and inflammatory markers. General fatigue was the most frequent symptom in both male patients with hypozincemia (9 out of 16: 56.3%) and female patients with hypozincemia (8 out of 27: 29.6%). Patients with severe hypozincemia (serum zinc level lower than 60 μg/dL) had major complaints of dysosmia and dysgeusia, which were more frequent complaints than general fatigue.

CONCLUSIONS

The most frequent symptom in long COVID patients with hypozincemia was general fatigue. Serum zinc levels should be measured in long COVID patients with general fatigue, particularly in male patients.

Nutrition Guidelines for Improved Clinical Care

Given the importance of poor nutrition as a cause for human chronic disease, it is surprising that nutrition receives so little attention during medical school training and in clinical practice. Specific vitamins, minerals, fatty acids, amino acids and water in the diet are essential for health, and deficiencies lead or contribute to many diseases. Proper use of the dietary guidelines and nutrition facts labeling can improve nutritional status and lead to the consumption of a healthy diet. COVID-19 has altered access to nutritious foods for millions and increased awareness of the importance of diet and immune function. An improved appreciation for nutrition will improve the outcomes of clinical care.

Synthesis, structural analysis, and docking studies with SARS-CoV-2 of a trinuclear zinc complex with N-phenylanthranilic acid ligands

The structure of a trinuclear zinc complex, hexakis(μ₂‐2‐anilinobenzoato)diaquatrizinc(II), [Zn₂(C₁₃H₁₀NO₂)₆(H₂O)₂] or (NPA)₆Zn₃(H₂O)₂ (NPA is 2‐anilinobenzoate or N‐phenylanthranilate), is reported. The complex crystallizes in the triclinic space group P and the central Zn^II atom is located on an inversion center. The NPA ligand is found to coordinate via the carboxylate O atoms with unique C—O bond lengths that support an unequal distribution of resonance over the carboxylate fragment. The axial H₂O ligands form hydrogen bonds with neighboring molecules that stabilize the supramolecular system in rigid straight chains, with an angle of 180° along the c axis. π stacking is the primary stabilization along the a and b axes, resulting in a highly ordered supramolecular structure. Docking studies show that this unique supramolecular structure of a trinuclear zinc complex has potential for binding to the main protease (M^pro) in SARS‐CoV‐2 in a different location from Remdesivir, but with a similar binding strength.

Developing a Brief Tele-Psychotherapy Model for COVID-19 Patients and Their Family Members

Objective: The COVID-19 pandemic is negatively impacting the mental health of COVID-19 patients and family members. Given the restrictions limiting in person contact to reduce the spread of the virus, a digital approach is needed to tackle the psychological aftermath of the pandemic. We present the development of a brief remote psychotherapy program for COVID-19 patients and/or their relatives. Methods: We first reviewed the literature on psychotherapeutic interventions for COVID-19 related symptoms. Based on this evidence, we leveraged ongoing clinical experiences with COVID-19 survivors and family members to design an intervention model that could be disseminated and integrated into the workflow of the mental health system. Results: This 8-session model -inspired by constructivist and hermeneutic-phenomenological therapies- serves COVID-19 patients during hospitalization, remission and recovery. This model can also be delivered to people dealing with the COVID-19 hospitalization/discharge of a family member, or the loss of a family member due to COVID-19. Conclusion: We described a remote psychotherapeutic approach to tackle the COVID-19 pandemic psychological aftermath. To date, the approach seems feasible and highly customizable to patients' needs. Studies are underway to test its preliminary efficacy. Once proven efficacious, this treatment model could provide a blueprint for future tele-psychology wide-scale interventions.