Use of sertraline and agomelatine in hemodialysis patients: A case series report

OBJECTIVE

Major depressive disorder (MDD) is one of the most common psychiatric issues in hemodialysis population. However, the research on proper diagnostic tools and its treatment is still insufficient. The study was performed to investigate the safety and effectiveness of sertraline and agomelatine in a group of hemodialysis patients.

PATIENTS AND METHODS

78 adult patients from one dialysis centre in Poland were included into the study. The Beck Depression Inventory II (BDI-II) was used to screen for depressive symptoms and was followed by the clinical interview with the psychiatrist. Nine patients diagnosed with major depressive disorder received antidepressant treatment with sertraline or agomelatine, according to the best clinical practice. The additional treatment with vortioxetine was used if the initial one was not effective. The time of observation was 24 weeks. The psychiatric follow up as well as the laboratory data were obtained during the course of observation.

RESULTS

All patients receiving sertraline achieved remission of depressive symptoms. In patients receiving agomelatine no remission was observed despite dose augmentation. The side effects of antidepressants were mild and did not result in treatment discontinuation. No abnormalities in liver enzymes levels were observed. In five cases the significant decrease of haemoglobin level was noticed, with no cases of bleeding reported.

CONCLUSION

In patients receiving sertraline the antidepressant effect was satisfactory. No remission of depressive symptoms was observed in patients taking agomelatine. The side effects of antidepressants were mild and transient. Further research on depression treatment in hemodialysis patients is needed, including newer medications.

Mass casualty incidents during the ten years of telemedical maritime assistance service in Gdynia, Poland

Mass casualty incident (MCI) is one of the most difficult situation in emergency medicine. Due to the specific conditions, MCIs occurring at sea are usually far more demanding than those happening on land. In this paper the authors would like to describe the MCIs, which have happened during almost 10 years of functioning of the Polish Telemedical Maritime Assistance Service (TMAS). First incident concerned a group of migrants floating on a raft on the Gulf of Mexico. The cause of the second incident was acute organophosphate intoxication among the crew of the merchant ship. The third incident was triggered by the coronavirus disease 2019 (COVID-19). It is important to emphasize, that triage system may help in proper management of MCIs. Cooperation of the medical services, such as TMAS, local emergency medical staff, Search and Rescue (SAR) service and military force seems to be crucial in MCI managements occuring at sea. In case of any doubts, change of a course and heading to the nearest port or immediate evacuation should be taken into consideration. The authors believe that analysis of these incidents may help TMAS personnel all over the world to handle MCIs in the future. Med Pr. 2023;74(2).

The psychosocial burden and stress coping strategies among seafarers

BACKGROUND

The seafarers' professional group is one of the most numerous in the world. According to the statistics of the European Maritime Safety Agency (2020), there are approximately 280,000 people employed at sea in the European Union. The specific work environment on the ship (climatic, physical, chemical, psychological factors, etc.) is related to experiencing long-term stress. The World Health Organization considers work-related stressors to be very important determinants of health and disease. One of the basic psychological resources related to adaptation to demanding working conditions are strategies for coping with stress. The aim of the study is to assess the occurrence of harmful psychosocial factors in the work of seafarers and the stress coping strategies and their relationship with somatic diseases.

MATERIALS AND METHODS

One hundred and fifteen seafarers who received a maritime health certificate participated in the study at the Occupational Medicine Clinic. The study was part of a larger project looking at the prevalence of cardiovascular risk factors among seafarers. The study used the Coping Questionnaire in Stressful Situations (CISS) (Endler and Parker) and a general questionnaire created for the purposes of the study.

RESULTS

Thirty six per cent respondents were exposed to traumatic event and to having nightmares, 13% had been discriminated at least once in the workplace. A positive correlation was found between discrimination and depression, nightmares and trauma. In addition, people who admitted having experienced trauma slept shorter (also while at home) and experienced nightmares more often. The most common style of coping was task oriented (29; 28.5%), and avoidance oriented (15%). The study also found a positive correlation between depression and the style of emotion-oriented coping and avoidance-oriented coping.

CONCLUSIONS

The specific working conditions and exposure to traumatic events have a negative impact on the health of seafarers by increasing the risk of depression and cardiovascular diseases. The coping styles with stress depend on the position in the ship hierarchy.

Polypharmacy among elderly patients in Poland: prevalence, predisposing factors, and management strategies

INTRODUCTION

The world's elderly population is growing dramatically. Pharmacotherapy in seniors is particularly challenging due to changes in metabolism, multimorbidity, and a great interest in nonprescription drugs.

OBJECTIVES

We aimed to provide up‑to‑datedata on pharmacotherapy in the geriatric population of Poland, to determine factors predisposing to polypharmacy and excessive polypharmacy, and to identify seniors who are most likely to require multidisciplinary interventions in the field of pharmacotherapy.

PATIENTS AND METHODS

We analyzed the use of all prescription and nonprescription drugs taken within 2 weeks preceding the study in a representative national sample of 3014 home‑dwelling seniors aged over 65 years. The variables of age, sex, place of residence, level of education, and multimorbidity were considered. Poststratification was used to balance the sample structure to match the Polish population of 2017.

RESULTS

Consumption of at least 1 drug was reported by 90.7% of the participants, and the mean number of drugs used was 5.01 (95% CI, 4.87-5.15). At least 1 nonprescription drug was used by 44.2% of the respondents, with a mean number of 0.52 (95% CI, 0.49-0.55). More than 5 drugs were taken by 53.5% of the entire population, while the use of more than 10 drugs was reported by 8.7% of the respondents, with multimorbidity as the most predisposing factor. Single‑pill combinations accounted for 27.2% of medications.

CONCLUSIONS

The high prevalence of polypharmacy resulting from multimorbidity confirms the need for the implementation of combined medical and pharmaceutical care of the geriatric patients.

Impact of hydration with beverages containing free sugars or xylitol on metabolic and acute kidney injury markers after physical exercise

The proper fluid and carbohydrates intake is essential before and during physical exercise, and for this reason most athletes drink beverages containing a high amount of free sugars. Sweetened soft drinks are also commonly consumed by those not doing any sport, and this habit seems to be both unhealthy and also the cause of metabolic problems. Recently, several sweeteners have been proposed to replace sugars in popular beverages. To examine the impact of free sugars and the popular sweetener xylitol on metabolic profile and the markers of kidney function and injury after exercise the present study was conducted with semi-professional football players. All participants were healthy, with a mean age of 21.91 years. Their sports skills were on the level of the 4th-5th division of the league. The subjects took part in four football training sessions. During each session they drank a 7% solution of sugar (sucrose, fructose, glucose) or xylitol. The tolerability of these beverages and well-being during exercise was monitored. Before and after each training session, blood and urine were collected. The markers of kidney function and injury, uric acid, electrolytes, complete blood count, CRP, serum albumin, serum glucose and the lipid profile were analyzed. The main finding of this study was that the xylitol beverage is the least tolerated during exercise and 38.89% of participants experienced diarrhea after training and xylitol intake. Xylitol also led to unfavorable metabolic changes and a large increase in uric acid and creatinine levels. A mean increase of 1.8 mg/dl in the uric acid level was observed after xylitol intake. Increases in acute kidney injury markers were observed after all experiments, but changes in urine albumin and cystatin C were highest after xylitol. The other three beverages (containing “free sugars” - glucose, fructose and sucrose) had a similar impact on the variables studied, although the glucose solution seems to have some advantages over other beverages. The conclusion is that sweeteners are not a good alternative to sugars, especially during exercise. Pure water without sweeteners should be drunk by those who need to limit their calorie consumption.

Clinical Trial Registration:ClinicalTrials.gov, (NCT04310514)

Local and Systemic Immunity Are Impaired in End-Stage-Renal-Disease Patients Treated With Hemodialysis, Peritoneal Dialysis and Kidney Transplant Recipients Immunized With BNT162b2 Pfizer-BioNTech SARS-CoV-2 Vaccine

Vaccination against COVID-19 in patients with end-stage renal disease (ESRD) on replacement therapy and kidney transplant recipients (KTRs) is particularly important due to the high mortality rate. Here, we tested the local and systemic immunity to the novel Pfizer BioNTech (BNT162b2) messenger RNA (mRNA) in ESRD, KTR patients, and healthy individuals (150 subjects). The ESRD group was divided into: hemodialysis (HD) and peritoneal dialysis (PD). We investigated the local and systemic immunity based on anti-N (nucleoprotein) and anti-S (spike1/2) Immunoglobulin A (IgA) and Immunoglobulin G (IgG) antibodies, respectively. Additionally, we performed an Interferon gamma (IFN-γ) release test Interferon-gamma release assay (IGRA) to monitor the cellular component of vaccine response. The control group had the highest level of anti-S IgG antibodies (153/2,080 binding antibody units (BAU)/ml) among all analyzed patients after the 1st and 2nd dose, respectively. The HD group (48/926 BAU/ml) had a diminished antibody level compared to PD (93/1,607 BAU/ml). Moreover, the seroconversion rate after the 1st dose was lower in HD than PD (56% vs. 86%). KTRs had extremely low seroconversion (33%). IgA-mediated immunity was the most effective in the control group, while other patients had diminished IgA production. We observed a lower percentage of vaccine responders based on the IFN-γ level in all research participants (100% vs. 85% in control, 100% vs. 80% in PD, 97% vs. 64% in HD). 63% of seropositive KTRs had a positive IGRA, while 28% of seronegative patients produced IFN-γ. Collectively, PD patients had the strongest response among ESRD patients. Two doses of the Pfizer vaccine are ineffective, especially in HD and KTRs. A closer investigation of ESRD and KTRs is required to set the COVID-19 vaccine clinical guidance.

Severe Breakthrough COVID-19 Cases during Six Months of Delta Variant (B.1.617.2) Domination in Poland

The emergence of a highly transmissible and a more pathogenic B.1.617.2 (delta) variant of SARS-CoV-2 has brought concern over COVID-19 vaccine efficacy and the increased risk of severe breakthrough infections. The objective of this study was to assess the frequency and the clinical characteristics of severe breakthrough COVID-19 cases recorded in 10 Polish healthcare units between 1 June and 31 December 2021, a period during which a rapid surge in the share of B.1.617.2 infections was seen, while a significant number of populations were already fully vaccinated. Overall, 723 individuals who completed the initial vaccination regime (fully vaccinated group) and an additional 18 who received a booster dose were identified—together, they represented 20.8% of all the COVID-19 patients hospitalized during the same period in the same healthcare institutions (0.5% in the case of a group that received a booster dose). Although laboratory and clinical parameters did not differ between both groups, patients who received a booster tended to have lower CRP, IL-6, PCT, and d-dimer levels and they required oxygen therapy less frequently. The most common early COVID-19 symptoms in the studied group were fatigue, cough, fever (>38 °C), and dyspnea. Individuals with no detectable anti-spike IgG antibodies constituted 13%; the odds of being a humoral non-responder to the vaccine were increased in patients aged >70 years. Fully vaccinated patients hospitalized after more than 180 days from the last vaccine dose were significantly older and they were predominantly represented by individuals over 70 years and with comorbidities, particularly cardiovascular disease. Contrary to mRNA vaccines, most patients vaccinated with adenoviral vector vaccines were infected within six months. A total of 102 fatal cases (14% of all deaths among vaccinated individuals; 0.7% in the case of a group that received a booster dose) were recorded, representing 17.6% of all the COVID-19 fatalities recorded in June−December 2021 in the considered healthcare units. The odds of death were significantly increased in men, individuals aged >70 years, patients with comorbidities, and those identified as humoral non-responders to vaccination; in fully vaccinated patients the odds were also increased when the second vaccine dose was given >180 days before the first COVID-19 symptoms. The mortality rate in immunocompromised subjects was 19%. The results indicate that compared to vaccinated individuals, severe COVID-19 and deaths in the unvaccinated group were significantly more prevalent during the B.1.617.2-dominated wave in Poland; and, it highlight the protective role of a booster dose, particularly for more vulnerable individuals.

Short-term Effects of Losartan on Cardiovascular Risk and Allograft Injury Biomarkers in Kidney Transplant Recipients

BACKGROUND

There is a controversy over the renoprotective and cardioprotective effects of renin-angiotensin-aldosterone system blockade in kidney transplant recipients (KTRs). The aim of the study was to evaluate the short-term effects of losartan on allograft injury, cardiovascular risk biomarkers and safety of the treatment in KTRs.

METHODS

An interim analysis of a prospective, open, multicenter, controlled clinical trial CELART (Cardiovascular Effects of Losartan After Renal Transplantation) was performed. KTRs were allocated to losartan (L) 50 to 100 mg or standard hypotensive treatment (ST) group to reach target blood pressure (BP) <140/90 mm Hg. The short-term effects of the therapy were evaluated after 6 months: estimated glomerular filtration rate (eGFR), albuminuria, the intrarenal fibrosis biomarkers: urine excretion of transforming growth factor β-1 (TGFβ-1) and procollagen type III amino terminal propeptide (PIIINP), cardiac biomarker: serum concentration of N-terminal-pro-B-type natriuretic peptide (NT-proBNP), 24-hour ambulatory BP measurement, and hemoglobin and potassium concentrations.

RESULTS

At baseline the groups did not differ with respect to age, primary nephropathy, comorbidity, immunosuppressive therapy, albuminuria, and graft function. A total of 61 (L group) and 73 (ST group) patients reached the target BP and completed protocol at 6 months. After 6 months of therapy there were no significant differences in changes of eGFR, albuminuria, hemoglobin and potassium concentrations, urine excretion of PIIINP, and TGFβ-1 between groups. There was a trend in the L group to decrease the concentration of serum NT-proBNP.

CONCLUSIONS

Losartan shows minimal adverse effects and no influence on graft function and biomarkers of graft fibrosis. It may have a positive effect on cardiovascular risk in KTRs. Further interim analyses of the CELART study will be conducted.

Waning Humoral Response after COVID-19 mRNA Vaccination in Maintenance Dialysis Patients and Recovery after a Complementary Third Dose

The aim of this study was to analyze the waning of anti-spike (S) antibodies after mRNA vaccination against COVID-19 in maintenance dialysis patients, and to assess the safety and effectiveness of the complementary third dose. This was a prospective, longitudinal study in which we analyzed the kinetics of antibodies up to six months after a two-dose vaccination (first protocol) in infection-naïve dialysis patients (IN-Ds), previously infected dialysis patients (PI-Ds) and subjects without chronic kidney disease (the controls), as well as their humoral response to the third dose of the same mRNA vaccine (second protocol). The respective reduction in antibody titer after 3 and 6 months by 82.9% and 93.03% in IN-Ds (n = 109), 73.4% and 93.36% in PI-Ds (n = 32) and 75.5% and 88.8% in the controls (n = 20) was demonstrated. Consequently, a protective antibody titer above 141 BAU/mL was found in only 47.7% and 23.8% of IN-Ds after 3 and 6 months, respectively. After the third vaccine dose, a significant increase in antibody titer was observed in all groups, with increases by a factor of ×51.6 in IN-Ds, ×30.1 in the controls and ×8.4 in PI-Ds. The median antibody titer after the third dose differed significantly between groups, and was the highest in PI-Ds: PI-Ds, 9090 (3300−15,000) BAU/mL; the controls, 6945 (2130−11,800); IN-Ds, 3715 (1470−7325) (p < 0.001). In conclusion, we observed similar degrees of antibody waning in all patients. After 3 months, over half of the infection-naïve dialysis patients had a very low antibody titer, and almost twenty percent of them had no antibodies at all. The humoral response to the third dose was very good, raising their titer of antibodies to a higher level than those in the general population who have received the primary two-dose scheme. The results support the administration of a complementary third dose of the mRNA vaccine for dialysis patients as soon as possible.

Safety and tolerability of mRNA COVID-19 vaccines in kidney transplant recipients

Background

Materials and Methods

Results

Conclusion

Angiotensin Converting Enzyme Inhibitors May Increase While Active Vitamin D May Decrease the Risk of Severe Pneumonia in SARS-CoV-2 Infected Patients with Chronic Kidney Disease on Maintenance Hemodialysis

The group most at risk of death due to COVID-19 are patients on maintenance hemodialysis (HD). The study aims to describe the clinical course of the early phase of SARS-CoV-2 infection and find predictors of the development of COVID-19 severe pneumonia in this population. This is a case series of HD nonvaccinated patients with COVID-19 stratified into mild pneumonia and severe pneumonia group according to the chest computed tomography (CT) pneumonia total severity score (TSS) on admission. Epidemiological, demographic, clinical, and laboratory data were obtained from hospital records. 85 HD patients with a mean age of 69.74 (13.19) years and dialysis vintage of 38 (14-84) months were included. On admission, 29.14% of patients had no symptoms, 70.59% reported fatigue followed by fever-44.71%, shortness of breath-40.0%, and cough-30.59%. 20% of the patients had finger oxygen saturation less than 90%. In 28.81% of patients, pulmonary parenchyma was involved in at least 25%. The factors associated with severe pneumonia include fever, low oxygen saturation and arterial partial pressure of oxygen, increased C-reactive protein and ferritin serum levels, low blood count of lymphocytes as well as chronic treatment with angiotensin converting enzyme inhibitors; while the chronic active vitamin D treatment was associated with mild pneumonia. In conclusion, even though nearly one-third of the patients were completely asymptomatic, while the remaining usually reported only single symptoms, a large percentage of them had extensive inflammatory changes at diagnosis with SARS-CoV-2 infection. We identified potential predictors of severe pneumonia, which might help individualize pharmacological treatment and improve clinical outcomes.

Employment after renal transplantation vs. the health locus of control and the quality of life

OBJECTIVES

The aim of the presented study was to compare the health locus of control (HLC) between employed and unemployed patients after kidney transplantation (KT), and to investigate the relationship between HLC and the quality of life (QoL).

MATERIAL AND METHODS

The study group consisted of 101 KT patients and the control group of 60 hemodialysis (HD) patients. The applied methods were: the Multidimensional Health Locus of Control Questionnaire (MHLC), the WHO Quality of Life Questionnaire (WHOQoL-BREF), and a survey collecting information on the socio-demographic status and work experience.

RESULTS

Overall, 57.5% of KT patients were employed and 42.5% were unemployed. In the HD group, 25% were employed and 71% were unemployed, while 4% did not disclose their employment status. The unemployed KT patients, in comparison with the employed ones, presented a higher feeling of the impact of chance on their health (unemployed M±SD 23.68±6.59; employed M±SD 21.02±4.57) and a lower level of QoL on the Somatic Scale (unemployed Me = 14.00, IQR = 3.00; employed Me = 1450, IQR = 3.00) and the Environmental Scale (unemployed M±SD 15.39±2.83; employed M±SD 16.85±3.24). In the employed KT group, the Internal Control Scale (MHLC) correlated with all QoL scales (the Somatic Scale: r = 0.292, p = 0.036; the Psychological Scale: r = 0.455, p = 0.001; the Social Scale: r = 0.304, p = 0.029; and the Environmental Scale: r = 0.307, p = 0.027). In the unemployed KT group, the Internal Control Scale (MHLC) correlated significantly with the Somatic Scale (r = 0.396, p = 0.013) and the Psychological Scale (r = 0.374, p = 0.019).

CONCLUSIONS

The employed KT patients have a higher level of independence, with results indicating a strong internal type. Additionally, the working patients assess their QoL better, both in terms of their health condition and the organization of satisfying environment. The obtained knowledge about the psychological characteristics of KT patients may be useful for the occupational activation programs and psycho-education for those with weaker predispositions. Int J Occup Med Environ Health. 2022;35(1):53-62.

[Haff disease - are we threatened with another epidemic?]

Haff disease is a group of symptoms caused by rhabdomyolysis following ingestion of some species of fish and crayfish. Pathophysiology remains unknown. Outbreaks of the Haff disease have been reported in many regions of the world. In this article we present the case of a 38-years-old patient, professional fisherman, suspected of suffering from Haff disease. He developed symptoms of diffuse myalgia, headache, chest pressure, brown-colored urine and elevated blood pressure. Predominant laboratory abnormalities were elevated serum creatine kinase and creatinine concentrations. During hospitalization the patient required the renal replacement therapy. As a result of applied procedures, clinical and laboratory improvement was achieved. The patient was discharged home in good general condition. The Haff disease should be included in the differential diagnosis of rhabdomyolysis. Detailed medical interview, especially questions about recently consumed food and occupational exposure, is crucial in making a proper diagnosis. Med Pr. 2021;72(5):605-10.

Predictors of Humoral Response to mRNA COVID19 Vaccines in Kidney Transplant Recipients: A Longitudinal Study-The COViNEPH Project

BACKGROUND

The efficacy of SARS-CoV-2 vaccination among kidney transplant recipients (KTR) is low. The main goal of this study was to analyze factors that may influence the humoral response to vaccination.

METHODS

We analyzed the titer magnitude of IgG antibodies directed against spike (S)-SARS-CoV-2 antigen after the second dose of the mRNA vaccine in 142 infection naïve KTR (83 men, i.e., 58.4%) with a median age (IQR) of 54 (41-63), and 36 respective controls without chronic kidney disease. mRNA-1273 or BNT162b2 were applied in 26% and 74% of KTR, respectively.

RESULTS

S-specific immune response (seroconversion) was seen in 73 (51.41%) of KTR, and in all controls 36 (100%). Independent predictors of no response were elder age, shorter transplantation vintage, and a more than two-drug immunosuppressive protocol. In subgroup analyses, the seroconversion rate was highest among KTR without MMF/MPS treatment (70%), treated with no more than two immunosuppressants (69.2%), treated without corticosteroid (66.7%), younger patients aged <54 years (63.2%), and those vaccinated with the mRNA-1273 vaccine (62.16%). The independent predictors of higher S-antibody titer among responders were younger age, treatment with no more than two immunosuppressants, and the mRNA-1273 vaccination.

CONCLUSIONS

Our study confirmed a low rate of seroconversion after vaccination with the mRNA vaccine in KTR. The major modifiable determinants of humoral response were the composition of the immunosuppressive protocol, as well as the type of vaccine. The latter could be taken into consideration when initial vaccination as well as booster vaccination is considered in KTR.

Safety and Tolerability of the BNT162b2 mRNA COVID-19 Vaccine in Dialyzed Patients. COViNEPH Project

Background and Objectives: The Pfizer-BioNTech (BNT162b2) COVID-19 mRNA vaccine has demonstrated excellent efficacy and safety in phase 3 trials. However, no dialyzed patients were included, and therefore safety data for this patient group is lacking. The aim of the study was to assess the safety and tolerances of vaccinations with BNT162b2 performed in chronically dialyzed patients. Materials and Methods: We performed a prospective cohort study including a group of 190 dialyzed patients (65% male) at median age 68.0 (55-74) years. 169 (89.0%) patients were treated with hemodialysis and 21 (11.0%) with peritoneal dialysis. The control group consisted of 160 people (61% male) without chronic kidney disease at median age 63 (range 53-77) years. Both groups were vaccinated with BNT162b2 with a 21-day interval between the first and the second dose. Solicited local and systemic reactogenicity, unsolicited adverse events and antipyretic and pain medication use were assessed with a standardized questionnaire. The toxicity grading scales were derived from the FDA Center for Biologics Evaluation and Research guidelines. Results: 59.8% (dose 1), 61.4% (dose 2) and 15.9% (dose 1), 29.4% (dose 2) dialyzed patients reported at least one local and one systemic reaction respectively within seven days after the vaccination. Many local and systemic solicited reactions were observed less frequently in dialyzed patients than in the age and sex matched control group and much less frequently than reported in the pivotal study. They were mostly mild to moderate, short-lived, and more frequently reported in younger individuals and women. No related unsolicited adverse events were observed. Conclusions: We have shown here that BNT162b2, an mRNA vaccine from Pfizer-BioNTech against SARS-COV-2 is safe and well-tolerated by dialyzed patients. The results can be useful for the nephrological community to resolve patients' doubts and reduce their vaccine hesitancy.

[New biochemical markers of ethyl alcohol abuse - new possibilities in clinical practice]

Alcohol ranks as one of the leading behavioral threats to health and life in developed countries. Alcohol abuse triggers serious social and economic effects: it contributes to higher prevalence of work-related and road accidents, as well as absence from work. The diagnosis and treatment of alcoholism still remain very difficult. Hence, the use of objective biochemical markers of alcohol abuse may contribute to earlier detection, more effective therapy and reliable teetotalism control. The aim of this study is to present the sensitive and specific biomarkers of alcohol abuse available in Poland, with particular emphasis on the practical use possibilities. Such tests may be widely used, e.g., in driving license regranting cases involving drivers whose licenses were suspended for driving when intoxicated, for the early detection of persons abusing alcohol in employment-related health controls, for abstinence monitoring during withdrawal treatment, for detecting alcohol consumption in transplant settings, for assessing the prevalence of alcohol drinking in pregnancy, as well as in autopsical examinations. The standardization of biomarkers measurement methods is essential. Moreover, concomitant disorders may pose a significant problem in the proper outcome analysis. Despite these limitations, objective biochemical markers of ethyl alcohol abuse may become helpful tools in medical care. They can play a particular role in occupational medicine diagnostics, contributing to the higher level of safety on public roads and to worker safety. Med Pr. 2021;72(2):173-84.

Changes in Novel AKI Biomarkers after Exercise. A Systematic Review

More than 100 substances have been identified as biomarkers of acute kidney injury. These markers can help to diagnose acute kidney injury (AKI) in its early phase, when the creatinine level is not increased. The two markers most frequently studied in plasma and serum are cystatin C and neutrophil gelatinase-associated lipocalin (NGAL). The former is a marker of kidney function and the latter is a marker of kidney damage. Some other promising serum markers, such as osteopontin and netrin-1, have also been proposed and studied. The list of promising urinary markers is much longer and includes cystatin C, NGAL, kidney injury molecule-1 (KIM-1), liver-type fatty-acid-binding protein (L-FABP), interleukin 18, insulin-like growth factor binding protein 7 (IGFBP-7), tissue inhibitor of metalloproteinases-2 (TIMP-2) and many others. Although these markers are increased in urine for no longer than a few hours after nephrotoxic agent action, they are not widely used in clinical practice. Only combined IGFBP-7/TIMP-2 measurement was approved in some countries as a marker of AKI. Several studies have shown that the levels of urinary AKI biomarkers are increased after physical exercise. This systematic review focuses on studies concerning changes in new AKI biomarkers in healthy adults after single exercise. Twenty-seven papers were identified and analyzed in this review. The interpretation of results from different studies was difficult because of the variety of study groups, designs and methodology. The most convincing data concern cystatin C. There is evidence that cystatin C is a better indicator of glomerular filtration rate (GFR) in athletes after exercise than creatinine and also at rest in athletes with a lean mass lower or higher than average. Serum and plasma NGAL are increased after prolonged exercise, but the level also depends on inflammation and hypoxia; therefore, it seems that in physical exercise, it is too sensitive for AKI diagnosis. It may, however, help to diagnose subclinical kidney injury, e.g., in rhabdomyolysis. Urinary biomarkers are increased after many types of exercise. Increases in NGAL, KIM-1, cystatin-C, L-FABP and interleukin 18 are common, but the levels of most urinary AKI biomarkers decrease rapidly after exercise. The importance of this short-term increase in AKI biomarkers after exercise is doubtful. It is not clear if it is a sign of mild kidney injury or physiological metabolic adaptation to exercise.

Pharmacological Interactions in the Elderly

Pharmacological therapy in the elderly is particularly complicated and challenging. Due to coexistence of three main predisposing factors (advanced age, multiple morbidity and polypharmacotherapy), this group of patients is prone to occurrence of drug interactions and adverse effects of incorrect drug combinations. Since many years patient safety during the treatment process has been one of key elements for proper functioning of healthcare systems around the world, thus different preventive measures have been undertaken in order to counteract factors adversely affecting the therapeutic effect. One of the avoidable medical errors is pharmacological interactions. According to estimates, one in six elderly patients may be at risk of a significant drug interaction. Hence the knowledge about mechanisms and causes of drug interactions in the elderly, as well as consequences of their occurrence are crucial for planning the process of pharmacotherapy. For the purpose of pharmacovigilance, a review of available methods and tools gives an insight into possible ways of preventing drug interactions. Additionally, recognizing the actual scale of this phenomenon in geriatric population around the world emphasizes the importance of a joint effort among medical community to improve quality of pharmacotherapy.

Occupational Activity After Renal Transplantation vs Quality of Life, Personality Profile, and Stress Coping Styles

INTRODUCTION

Kidney transplantation (KT) increases the quality of life (QoL) of patients with chronic kidney disease. Employment is one the objective indicators of KT success. The aim of the presented study was to assess the psychological predispositions of KT and hemodialysis (HD) patients, such as stress coping styles, chosen personality features, and their relationship with employment and QoL.

MATERIAL AND METHODS

One hundred and sixty-one persons were examined, 101 after KT, and 60 HD patients. The following methods were applied: NEO-FFI Personality Inventory; Coping Inventory for Stressful Situations (CISS); WHOQoL-BREF; and general survey, measuring sociodemographic data and work experience.

RESULTS

In the KT group, 58 persons were employed and 43 were unemployed. HD patients were mostly unemployed, with only 15 persons working. Significant differences were identified between the results of the following variables: WHOQoL environmental scale (employed m= 16.8, standard deviation [SD] = 3; unemployed m= 15, SD = 2.8); extraversion (employed m = 6.7, SD = 2; unemployed m = 5.6, SD = 2); somatic WHOQoL scale (HD m = 12.2, SD = 2.7; KT m = 14.2, SD = 3.5). In the KT group, the following correlations were identified: extraversion with contact seeking strategy (r = 0.553), agreeableness (r = 0.245), and conscientiousness (r = 0.384); agreeableness with conscientiousness (r = 0.336). In the HD group, the following correlations were identified: task-oriented style with conscientiousness (r = 0.474); avoidance-oriented style with conscientiousness (r = -0.466); contact seeking with extraversion (r = 0.402) and agreeableness (r = 0.469).

CONCLUSIONS

The following conclusions were reached: Social competence, such as seeking and maintaining contacts, positively translates to features connected with occupational activity. Social skills strengthen the organization of healthier environment and increase QoL. Employed patients have higher social skills and QoL.

Tumor Suppressors-HTRA Proteases and Interleukin-12-in Pediatric Asthma and Allergic Rhinitis Patients

Background and objective: Allergy belongs to a group of mast cell-related disorders and is one of the most common diseases of childhood. It was shown that asthma and allergic rhinitis diminish the risk of various cancers, including colon cancer and acute lymphoblastic leukemia. On the other hand, asthma augments the risk of lung cancer and an increased risk of breast cancer in patients with allergy has been observed. Thus, the relation between allergy and cancer is not straightforward and furthermore, its biological mechanism is unknown. The HTRA (high temperature requirement A) proteases promote apoptosis, may function as tumor suppressors and HTRA1 is known to be released by mast cells. Interleukin-12 (Il-12) is an important cytokine that induces antitumor immune responses and is produced mainly by dendritic cells that co-localize with mast cells in superficial organs. Material and methods: In the present study we have assessed with ELISA plasma levels of the HTRA proteins, Il-12, and of the anti-HTRA autoantibodies in children with allergy (40) and in age matched controls (39). Children are a special population, since they usually do not have comorbidities and take not many drugs the processes we want to observe are not influenced by many other factors. Results: We have found a significant increase of HTRA1, 2 and 3, and of the Il-12 levels in the children with atopy (asthma and allergic rhinitis) compared to controls. Conclusion: Our results suggest that the HTRA1-3 and Il-12 levels might be useful in analyzing the pro- and antioncogenic potential in young atopic patients.

Pregnancy After Kidney Transplantation With Maternal and Pediatric Outcomes: A Single-Center Experience

Outcomes of pregnancies after kidney transplantation were evaluated. Thirty-one pregnancies in 26 women were noted. The mean maternal age at pregnancy was 31 ± 5 years (range, 23-44 years). The interval between transplantation and conception was 54 ± 51 months (range, 7-213 months). The mean serum creatinine concentration before conception was 1.28 ± 0.4 mg/dL (range, 0.8-2.45 mg/dL), and mean estimated glomerular filtration rate (Chronic Kidney Disease Epidemiology Collaboration) was 62 ± 18 mL/min/1.73 m² (range, 27-106 mL/min/1.73 m²). There were no maternal deaths. There was 1 case of suspected acute rejection after delivery. There was 1 case of graft loss during pregnancy. Maternal complications included edema (6/26), hypertension (7/26), increase of (2/26) or appearance of proteinuria (5/26), and preeclampsia (4/26). Mean creatinine increase during pregnancy was 0.02 mg/dL. Mean creatinine 1 year after pregnancy was 1.54 mg/dL (±0.8 mg/dL). There were 19 cesarean sections. Fetal outcomes included 25 live births, 4 abortions, and 2 stillbirths. Out of 25 live births, 22 children were considered healthy, 2 children had congenital defects, and there were 2 deaths at neonatal age. Mean pregnancy age was 35 ± 4 weeks (range, 24-40 weeks). The rate of premature deliveries was 15 of 25. Mean neonate birth weight was 2363 ± 1029 grams (range, 490-4100 grams). The rate of babies small for gestational age was 19%. During follow-up (range, 0.5-30 years) 5 of 26 patients lost grafts (between 3 and 15 years after pregnancy); most (20) of the children previously considered healthy had good long-term development. Our results confirm that risk of pregnancy in kidney transplant recipients can be accepted, and children considered healthy at delivery develop well.

[Mesoamerican nephropathy - a new challenge for occupational physicians]

Mesoamerican nephropathy (MeN) is an endemic form of chronic kidney disease (CKD) that is not related to risk factors for CKD, such as diabetes and hypertension. It primarily affects men, rural and agricultural laborers, who work in an extremely hot and dry environment. The greatest increase in the prevalence of CKD, particularly since the late 1990s, has been reported in Central America and Southern Mexico, where the prevalence is almost 9 times higher than in the USA. The highest mortality associated with CKD is reported in El Salvador where a 10-fold increase was recorded in 1984-2005. In histological examination, MeN patients manifest tubulointerstitial lesions and, in some cases, also lesions in the glomeruli. The cause of MeN remains unclear. Repeated episodes of occupational heat stress, and sweating accompanied by water loss, have a significant impact on the disease development. The disease is a significant social and economic problem, and a challenge in the field of diagnostics, therapy and prevention for physicians of many specialties, especially for occupational physicians. Med Pr. 2020;71(3):353-61.

The Effect of Vitamin D3 Supplementation on Hepcidin, Iron, and IL-6 Responses after a 100 km Ultra-Marathon

Deficiencies in iron and vitamin D are frequently observed in athletes. Therefore, we examined whether different baseline vitamin D₃ levels have any impact on post-exercise serum hepcidin, IL-6 and iron responses in ultra-marathon runners. In this randomized control trial, the subjects (20 male, amateur runners, mean age 40.75 ± 7.15 years) were divided into two groups: experimental (VD) and control (CON). The VD group received vitamin D₃ (10,000 UI/day) and the CON group received a placebo for two weeks before the run. Venous blood samples were collected on three occasions-before the run, after the 100 km ultra-marathon and 12 h after the run-to measure iron metabolism indicators, hepcidin, and IL-6 concentration. After two weeks of supplementation, the intervention group demonstrated a higher level of serum 25(OH)D than the CON group (27.82 ± 5.8 ng/mL vs. 20.41 ± 4.67 ng/mL; p < 0.05). There were no differences between the groups before and after the run in the circulating hepcidin and IL-6 levels. The decrease in iron concentration immediately after the 100-km ultra-marathon was smaller in the VD group than CON (p < 0.05). These data show that various vitamin D₃ status can affect the post-exercise metabolism of serum iron.

Telemedical Maritime Assistance Service at the University Center of Maritime and Tropical Medicine in Gdynia. The analysis of 6 years of activity

BACKGROUND

In the 1960s, the International Labour Organization passed a convention under which all countries with national shipping were obliged to create a 24-h telemedicine center for ships. In accordance with the convention, Telemedical Assistance Service centers were to provide permanent access to medical advice given by qualified doctors and to create an international platform for the exchange of information and experience. In Poland, the Telemedical Maritime Assistance Service (TMAS) was established in 2012, and its duties in a 24-h system are carried out by doctors from the University Center of Maritime and Tropical Medicine (UCMTM) in Gdynia. The aim of this work was to determine the reasons for medical officers reporting for help from the TMAS doctor on duty and to create a database of the most common diagnoses and actions undertaken, and in particular evacuation.

MATERIAL AND METHODS

In the presented work, the authors analyzed TMAS telephony and e-mail advice provided by doctors of the UCMTM in Gdynia, in the period from October 2012 to the end of 2018.

RESULTS

In the 6-year period, UCMTM doctors provided TMAS advice 225 times, recommending evacuation in over 20% of these cases. Infectious diseases were the most common cause of contact in the entire period under analysis - 61 cases were recorded, accounting for as many as 27% of all applications. Injuries were the second most frequent reason for seeking help from TMAS, and 20% of TMAS applications (44 cases) were related to trauma.

CONCLUSIONS

The obtained data show that TMAS doctors face various medical problems; therefore, providing proper medical assistance to patients requires a close multidisciplinary cooperation between medical officers, TMAS doctors and emergency services. Med Pr. 2020;71(2):121-5.

Changes in Water Soluble Uremic Toxins and Urinary Acute Kidney Injury Biomarkers After 10- and 100-km Runs

Acute kidney injury (AKI) is described as a relatively common complication of exercise. In clinical practice the diagnosis of AKI is based on serum creatinine, the level of which is dependent not only on glomerular filtration rate but also on muscle mass and injury. Therefore, the diagnosis of AKI is overestimated after physical exercise. The aim of this study was to determine changes in uremic toxins: creatinine, urea, uric acid, asymmetric dimethylarginine (ADMA), symmetric dimethylarginine (SDMA), trimethylamine N-oxide (TMAO) and urinary makers of AKI: albumin, neutrophil gelatinase-associated lipocalin (uNGAL), kidney injury molecule-1 and cystatin-C (uCyst-C) after long runs. Sixteen runners, mean age 36.7 ± 8.2 years, (2 women, 14 men) participating in 10- and 100-km races were studied. Blood and urine were taken before and after the races to assess markers of AKI. A statistically significant increase in creatinine, urea, uric acid, SDMA and all studied urinary AKI markers was observed. TMAO and ADMA levels did not change. The changes in studied markers seem to be a physiological reaction, because they were observed almost in every runner. The diagnosis of kidney failure after exercise is challenging. The most valuable novel markers which can help in post-exercise AKI diagnosis are uCyst-C and uNGAL.

Is it worth to continue to analyse the factors of cardiovascular risk among the sailors? Review of literature

BACKGROUND

Cardiovascular diseases are still the most common cause of death from natural causes among seafarers. The aim of the study was to determine which of the cardiovascular risk factors listed in the current recommendations of the European Society of Cardiology occur among seafarers.

MATERIALS AND METHODS

The paper is a review of literature from PubMed Database.

RESULTS

Based on conducted analysis of over 31 papers high prevalence of classic and other cardiovascular risk factors among seafarers was proven. The most common risk factors among off-shore workers are overweight and obesity (over 64%); moreover, these factors occur more often among seafarers than in the general popula- tion. Also hypertension, smoking, type 2 diabetes and unfavourable lipid profile were present more often in this occupational group. In the analysed studies attention was also paid to factors often overlooked in risk assess- ment such as mental and inflammatory illnesses, unfavourable working conditions and psychological burden.

CONCLUSIONS

Seafarers have a higher cardiovascular risk because, among other things, the prevalence of "old and new" risk factors among them is higher than in general population.

Changes in electrolytes and uric acid excretion during and after a 100 km run

Physical activity leads to changes in water and electrolyte homeostasis and to enhanced purine metabolism. The typical abnormalities observed after exercise are hyperkaliemia, hyper- or hyponatremia and hyperuricemia. The possible explanations of hyperuricemia are: increased metabolism and decreased elimination of uric acid. Changes in uric acid excretion are commonly observed in disturbances of sodium and water homeostasis. The aim of this study was to evaluate changes in electrolytes and uric acid excretion during a very long period of exercise. Twenty subjects with a mean age of 40.75±7.15 years took part in a 100 km run. The route of the run was based on the university stadium track. All subjects were experienced amateur runners, with a mean time of regular running of 6.11±7.19 years. Blood was collected before the start, after every 25 km and 12 hours after the run. The levels of electrolytes, creatinine, uric acid, cortisol, aldosterone, creatine kinase, C-reactive protein and interleukin-6 were measured. Creatinine clearance, urinary potassium-to-sodium ratio, fractional excretion of electrolytes and uric acid were calculated. Seventeen runners completed the study. Significant increases in sodium (from 141.65±1.90 to 144.29±3.65mmol/l), potassium (from 4.53±0.34 to 5.03±0.42mmol/l), creatinine (from 0.88±0.11 to 1.10±0.20mg/dl) and uric acid (from 5.15±0.87 to 5.94±1.50 mg/dl) were observed after 100 km (p less than 0.05). Other significant changes during the study were noted in fractional excretions of sodium (from 0.86±0.29 to 0.33±0.13%) and potassium (from 6.66±2.79 to 18.90±10.01%), probably reflecting the decrease in renal blood flow (RBF) and increase in renal tubule reabsorption. The fractional excretion of uric acid slightly increased but without statistical significance from 5.34±1.51 to 6.09±2.34%. The results of our study showed that during very long but not very intensive exercise there is no change in uric acid excretion, although at the same time profound changes in electrolyte excretion are found. Both hyperuricemia and hyperuricosuria may be harmful, therefore it seems logical that the best way to avoid those abnormalities is to maintain fractional uric acid excretion.

Immune response against HtrA proteases in children with cutaneous mastocytosis

Mast cells play an important role in both, the innate and adaptive immunity, however, clonal proliferation of abnormal mast cells in various organs leads to mastocytosis. A skin variant of the disease, cutaneous mastocytosis (CM) is the most frequent form of mastocytosis in children. HtrA proteases are modulators of important cellular processes, including cell signaling and apoptosis, and are related to development of several pathologies. The above and the observation that mast cells constitutively release the HtrA1 protein, prompted us to investigate a possible involvement of the HtrA proteins in pediatric CM. Levels of the serum autoantibodies (IgG) against the recombinant HtrA proteins (HtrA1-4) in children with CM (n=36) and in healthy controls (n=62) were assayed. Anti-HtrA IgGs were detected using enzyme linked immunosorbent assay (ELISA) and Western-blotting. In the CM sera, levels of the anti-HtrA1 and anti-HtrA3 autoantibodies were significantly increased when compared to the control group, while the HtrA protein levels were comparable. No significant differences in the anti-HtrA2 IgG level were found; for the anti-HtrA4 IgGs lower levels in CM group were revealed. In healthy children, the IgG levels against the HtrA1, -3 and -4 increased significantly with the age of children; no significant changes were observed for the anti-HtrA2 IgG. Our results suggest involvement of the HtrA1 and HtrA3 proteins in pediatric CM; involvement of the HtrA4 protein is possible but needs to be investigated further. In healthy children, the autoantibody levels against HtrA1, -3 and -4, but not against HtrA2, increase with age.

Parasitic Infections Associated with Unfavourable Outcomes in Transplant Recipients

Introduction. The immunosuppression used after transplantation (Tx) is associated with an increased risk of opportunistic infections. In Europe, parasitic infections after Tx are much less common than viral, bacterial and fungal ones. However, diseases caused by parasites are very common in tropical countries. In the last years the number of travellers with immunosuppression visiting tropical countries has increased. Methods. We performed a literature review to evaluate a risk of parasitic infections after Tx in Europe. Results. There is a real risk of parasitic infection in patients after Tx travelling to tropical countries. Malaria, leishmaniasis, strongyloidiasis and schistosomiasis are the most dangerous and relatively common. Although the incidence of these tropical infections after Tx has not increased, the course of disease could be fatal. There are also some cosmopolitan parasitic infections dangerous for patients after Tx. The greatest threat in Europe is toxoplasmosis, especially in heart and bone marrow recipients. The most severe manifestations of toxoplasmosis are myocarditis, encephalitis and disseminated disease. Diarrhoea is one of the most common symptoms of parasitic infection. In Europe the most prevalent pathogens causing diarrhoea are Giardia duodenalis and Cryptosporidium. Conclusions. Solid organ and bone marrow transplantations, blood transfusions and immunosuppressive treatment are associated with a small but real risk of parasitic infections in European citizens. In patients with severe parasitic infection, i.e., those with lung or brain involvement or a disseminated disease, the progression is very rapid and the prognosis is bad. Establishing a diagnosis before the patient's death is challenging.

Interrelationship between Cardiac Structure and Function and Incidence of Arrhythmia in Peritoneal Dialysis Patients

Cardiovascular complications in patients with end-stage renal disease requiring dialytic therapy are frequent and account for approximately 40% of all deaths in these patients. The aim of this study was to analyze the occurrence of cardiac arrhythmia in peritoneal dialysis (PD) patients with respect to the changes in left ventricular structure and function. To determine characteristics of arrhythmia in patients on PD for chronic renal failure, 30 patients (18 male and 12 female; aged 54.1±13.8 years) underwent twice (interval of 20±4.1 months) ambulatory 24 hour Holter ECG monitoring. At the same time all the patients were analyzed by echocardiography and pulsed Doppler echocardiography to estimate cardiac structure and function. Ventricular arrhythmias were seen in 9 patients (30%) during the first examination and in 13 patients (43.3%) on the second. Ventricular arrhythmias were observed only in patients with left ventricular hypertrophy (LVH). Supraventricular arrhythmias were seen in 12 (40%) and 17 (56.7%) patients. The majority of these patients also had LVH, with 11/12 (91.7%) patients at the first examination and 15/17 (88.2%) at the second respectively. We conclude that the incidence of arrhythmia is primarily dependent on the presence of LVH in PD patients. It appears that peritoneal dialysis does not provoke or aggravate arrhythmia.

The Role of Automated Peritoneal Dialysis in Peritoneal Dialysis Programme: One Centre Experience

The results of the Automated Peritoneal Dialysis (APD) therapy in adult patients in the Department of Nephrology in Gdansk during the years 1995–98 are presented. Seventeen patients (8-M, 9-F) aged 25–86 years (mean age 55.3 years), including 7 diabetics, were treated with different forms of APD. The most common indication for APD therapy was patients' loss of ability to perform Continuous Ambulatory Peritoneal Dialysis due to progressive blindness, leg amputation related to diabetic foot complications or cerebrovascular episodes (8 pts). The cumulative therapy period was 231.5 patient-months.

During the observation 4 patients died, 1 received kidney transplant and 12 were still treated with APD at the end of the study. No patient was transferred to long-term hemodialysis. The peritonitis rate in the APD group was 1/57.5 patient-months. Most patients reached adequacy targets, the mean Kt/V value was 1.97 (range 1.17 - 2.36). To achieve this, 12–19 litres of dialysate were used per day (mean 14.6 L/d). There were significant differences between CCPD and NPD groups with respect to dialysis adequacy, body weight and dialysis fluid volume. We conclude that APD may be used with success in patients in whom continuation of CAPD or HD therapy is very difficult due to its complications or comorbid conditions.

[Chronic kidney disease - The relevant information for an occupational physician]

For a number of years chronic kidney disease (CKD) has been listed in the group of lifestyle diseases, such as obesity, diabetes, cardiovascular disease and hypertension. It is estimated that in Poland more than 4 million people may suffer from various stages of CKD. Chronic kidney disease may also be a consequence of all the other civilization diseases. At the same time it is worth noting that nephrological problems are increasingly being taken into account in modern medical certification. The aim of this work is, among other things, to improve safe access to the labor for patients with kidney diseases. In the legislation existing in our country since 2014 it is stated that chronic renal failure is a potential health contraindication to driving. Also in the annex to the Regulation of the Minister of Health dated 9 December 2015 on health conditions required for seafarers to work on a seagoing ship, it is said that ICD-10 codes (International Classification of Diseases) corresponding to acute and chronic renal failure (N17-N19) should be taken into account when qualifying employees to work at sea. Med Pr 2018;69(1):67-75.

Aliskiren reduces albuminuria after kidney transplantation

BACKGROUND

The renoprotective effects of the direct renin inhibitor, aliskiren, in renal transplant recipients have been supposed, but not finally proven. We performed an exploratory double-blind, losartan controlled, cross-over study to evaluate the influence of aliskiren, direct renin inhibitor, on albuminuria and other surrogate markers of kidney injury in patients after renal transplantation. The safety of this therapy was also evaluated.

METHOD

16 of 18 patients (12 M, 4 F), 48.3 ± 9.0 years, 57.7 ± 9.1 months after kidney transplantation, with hypertension and stable serum creatinine 1.4 ± 0.08 mg/dl without proteinuria, completed the protocol. Each patient underwent two 8-week treatment periods (one with 150 mg of aliskiren, and one with 50 mg of losartan) in random order, allowing an 8-week placebo washout between them.

RESULTS

There were no differences in albuminuria, transforming growth factor β-1 and 15-F2t-isoprostanes urine excretion between aliskiren and losartan. Creatinine serum level, eGFR, 24 h systolic and 24 h diastolic blood pressure were stable through the study. There were no differences in haemoglobin and potassium serum concentration between studied drugs.

CONCLUSION

Aliskiren decreases albuminuria in renal transplant recipients with clinically minimal side effects. The effect does not differ from that of losartan.

[Selected work-related nephropathies]

Infections, high temperature and many of the toxic substances can cause kidney damage. Acute kidney injury is a well known complication of some work-related diseases, e.g., lead intoxication. Chronic kidney disease can also be caused by some occupational factors. Three work-related nephropathies, in which causal connection with work has been proved, are discussed in this article. There are different risk factors of nephrolithiasis, lead nephropathy and silica nephropathy, but each of them can cause chronic kidney disease. Prevention of these nephropaties seems to be relatively simple. The principles of protection from the toxic effects of heavy metals and silica dust are very specific. The most important prevention of kidney stones is correct fluid intake. In addition to providing adequate quantities of drinking water, it is also important to educate exposed workers and assure enough rest breaks at work.