Intestinal fungal and parasitic infections in kidney transplant recipients: a multi-center study

Kidney transplant recipients are susceptible to various infections due to the use of immunosuppressive drugs. The present study was performed as studies on the prevalence of intestinal fungal and parasitic infections in kidney transplant recipients are limited. A total of 150 kidney transplant recipients and 225 matched immunocompetent outpatients, who were referred to the laboratory of Noor Hospital, Isfahan, were studied. After recording demographic characteristics, direct test and specific laboratory cultures were carried out on the stool specimens. Patients were instructed on sanitary rules and, during each medical visit, they were reminded of the same. The overall prevalence of intestinal parasitic and fungal infections was 33.3% and 58.7%, respectively, in transplant recipients and 20% and 51%, respectively, in the control group; the difference was not statistically significant. The most prevalent intestinal parasite was Entameba coli, which was seen in 9.3% of the study patients and 6.7% of the controls. The most prevalent fungus was Candida sp., which was seen in 22% of the study patients and 24.4% of the control group. Co-existing infection with two or more fungi was seen in 14.8% and 3.4% in the case and control groups, respectively; P <0.001. Interestingly, there was no significant difference in the prevalence of infection by a single organism between the two groups. However, co-existing infection with two or more species was more prevalent in transplant recipients. We conclude that further investigations are needed to evaluate the pathogenesis of infection with these microorganisms.     

G-CSF-initiated myeloid cell mobilization and angiogenesis mediate tumor refractoriness to anti-VEGF therapy in mouse models

Recent studies suggest that tumor-associated CD11b⁺Gr1⁺ myeloid cells contribute to refractoriness to antiangiogenic therapy with an anti-VEGF-A antibody. However, the mechanisms of peripheral mobilization and tumor-homing of CD11b⁺Gr1⁺ cells are unclear. Here, we show that, compared with other cytokines [granulocyte-macrophage colony stimulating factor (GM-CSF), stromal derived factor 1α, and placenta growth factor], G-CSF and the G-CSF-induced Bv8 protein have preferential expression in refractory tumors. Treatment of refractory tumors with the combination of anti-VEGF and anti-G-CSF (or anti-Bv8) reduced tumor growth compared with anti-VEGF-A monotherapy. Anti-G-CSF treatment dramatically suppressed circulating or tumor-associated CD11b⁺Gr1⁺ cells, reduced Bv8 levels, and affected the tumor vasculature. Conversely, G-CSF delivery to animals bearing anti-VEGF sensitive tumors resulted in reduced responsiveness to anti-VEGF-A treatment through induction of Bv8-dependent angiogenesis. We conclude that, at least in the models examined, G-CSF expression by tumor or stromal cells is a determinant of refractoriness to anti-VEGF-A treatment.     

Conservative management of placenta increta: case report and literature review

Placenta increta, a rare complication of pregnancy, is associated with significant postpartum hemorrhage often requiring emergency hysterectomy. We report a case of conservative management, with a combination of parenteral methotrexate, serial ultrasound and β-hCG assessment. Serum β-hCG levels were undetectable after 8 weeks of therapy. A scan at 6 months showed complete involution of the uterus. Review of the literature discussing the diagnostic tools, clinical features, management and outcome of pregnancies with placenta increta.     

Methylphenidate modifies the motion of the circadian clock

People with attention-deficit/hyperactivity disorder (ADHD) often experience sleep problems, and these are frequently exacerbated by the methylphenidate they take to manage their ADHD symptoms. Many of the changes to sleep are consistent with a change in the underlying circadian clock. The present study was designed to determine if methylphenidate alone could alter properties of the circadian clock. Young male mice were examined in light-dark cycles and in constant darkness and recordings were performed on behavioral activity, sleep, and electrical activity in the suprachiasmatic nucleus (SCN) of freely moving mice. Methylphenidate in the drinking water (0.08%) significantly increased activity in the mid-to-late night, and led to a delay in the onset of activity and sleep relative to the light-dark cycle. While locomotor levels returned to baseline after treatment ended, the phase angle of entrainment required at least a week to return to baseline levels. In constant darkness, the free-running period of both wheel-running and general locomotor rhythms was lengthened by methylphenidate. When the treatment ended, the free-running period either remained stable or only partially reverted to baseline levels. Methylphenidate also altered the electrical firing rate rhythms in the SCN. It induced a delay in the trough of the rhythm, an increment in rhythm amplitude, and a reduction in rhythm variability. These observations suggest that methylphenidate alters the underlying circadian clock. The observed changes are consistent with clock alterations that would promote sleep-onset insomnia.     

Bcl-2 inhibits gut epithelial apoptosis induced by acute lung injury in mice but has no effect on survival

Gut epithelial apoptosis is increased in human studies and animal models of noninfectious inflammation and sepsis. Elevated intestinal cell death appears to be physiologically significant in sepsis. Previous studies demonstrate that overexpression of the antiapoptotic protein Bcl-2 in the gut epithelium of transgenic mice is associated with improved survival from Pseudomonas aeruginosa pneumonia and cecal ligation and puncture. The functional significance of elevated gut apoptosis in noninfectious inflammation has not been examined. We hypothesized that intestinal apoptosis would be detrimental to survival in noninfectious critical illness. To address this issue, acute lung injury (ALI) was induced with intratracheal injection of lipopolysaccharide (LPS, 800 microg) in wild-type (WT) FVB/N mice and transgenic mice that overexpress Bcl-2 in their intestinal epithelium. Guts were harvested at 12, 24, 48, and 72 h and assessed for apoptosis by both hematoxylin and eosin and active caspase-3 staining in 100 contiguous crypts. ALI increased gut epithelial apoptosis 12 h after LPS instillation compared with shams (P < 0.01), whereas overexpression of Bcl-2 decreased intestinal apoptosis compared with WT animals with ALI when assayed by active caspase-3 (P < 0.05). Plasma levels of tumor necrosis factor alpha, interleukin (IL)-6, and IL-10 were similar between WT and transgenic animals with ALI, both of which had elevated IL-10 levels at 12 h and elevated IL-6 levels at 24 h compared with sham animals. In a separate experiment, transgenic and WT animals with ALI were followed for mortality to determine whether gut overexpression of Bcl-2 conferred a survival advantage. Survival at 10 days was 73% in WT animals (n = 33) and 65% in Bcl-2 animals (n = 23, P = ns). These results indicate that while gut epithelial apoptosis is elevated in multiple models of critical illness, prevention of intestinal cell death by overexpression of Bcl-2 is associated with a disparate survival effect between sepsis and noninfectious inflammation.     

Haemoglobin changes before and after packed red blood cells transfusion in burn patients: A retrospective cross-sectional study

The present study aimed to investigate haemoglobin (Hb) changes before and after packed red blood cell (RBC) transfusion in burn patients. This study was a retrospective cross-sectional study that was conducted on burn patients in Velayat hospital in Rasht, Iran. The sampling method of this study was consecutive sampling. Data were collected using patient records, including age, gender, body mass index (BMI), total body surface area (TBSA) percentage, length of hospitalisation, Frequency of receiving packed RBCs, and Hb level before each packed RBC transfusion and 4 to 6 hours after transfusion. Paired t tests and analysis of variance (ANOVA) were used to compare the study variables. Pearson's correlation coefficient was used to investigate the relationship between Hb changes after the transfusion of packed RBCs and the study variables. A total of 110 burn patients participated in this study. The average Hb before and after transfusion was 8.07 (SD = 0.97) and 9.16 (SD = 1.01), respectively, which were significantly different (P = .0001). The results showed that there was a significant negative relationship between the variables of age (r = −0.188, P = .0001), BMI (r = −0.110, P = .035), and TBSA percentage (r = −0.122, P = .019) with changes in Hb after transfusion. Also, the duration of hospitalisation had a significant positive relationship with Hb changes after transfusion (r = 0.124, P = .017). In sum, Hb level compensation through packed RBC transfusion in elderly burn patients has more challenges. The number of changes in Hb level after receiving packed RBCs decreased with increasing TBSA, BMI, and age. Also, there was a positive correlation between the duration of hospitalisation and changes in Hb levels.     

Phantom pain in bilateral upper limb amputation

Purpose.?To alert health professionals on presence and extent of phantom pain and sensation following bilateral upper limb amputation.

Methods.?Of a total of 140 war-related bilateral upper limb amputees in Iran, 103 subjects were thoroughly examined in this cross-sectional study by a physical medicine specialist. The patients were questioned for the presence of phantom pain and sensations, and frequency and intensity of the feeling were recorded.

Results.?At 17.1 ± 6.1 years after injury, 82.0% of the 103 amputees suffered from phantom sensation, including varying degrees of phantom limb pain in 53.9% of stumps. Phantom phenomena had a higher frequency in the right extremities, but this was not statistically significant (p > 0.01). Of those amputees who had phantom pain or sensation, 51.2% reported that they ‘always’ had phantom limb sensation; and approximately one-fourth of the subjects (24.6%) ‘always’ had phantom pain. Among the stumps who reported phantom pain (N = 112), the pain was excruciating (38.5%), distressing (34.9%) or discomforting (25.6%). A significant statistical relation between phantom limb sensation and level of amputation was observed (p < 0.01).

Conclusion.?At this time there is no healing for phantom pain; medical and surgical modalities only bring temporary relief, and less than 1% of the respondents achieve permanent relief through different treatment methods.     

Self-reported mental health in children ages 6–12 years across eight European countries

Worldwide, approximately one in eight children or adolescents suffers from a mental disorder. The present study was designed to determine the self-reported prevalence of mental health problems in children aged 6–11 years across eight European countries including Italy, France, Germany, the Netherlands, Lithuania, Bulgaria, Romania, and Turkey. Data were drawn from 6245 children participating in the School Children Mental Health in Europe (SCHME) study and a large cross-sectional survey in France. Self-reported child mental health was assessed using the Dominique Interactive (DI). Overall, 22.0% of children were identified per their own evaluation as having at least one mental disorder, ranging from 16.4% in the Netherlands to 27.9% in Bulgaria. The prevalence of internalizing disorders was 18.4% across countries and ranged from 11.8% in the Netherlands to 24.3% in Turkey. The prevalence of externalizing disorders was lower with an average of 7.8%, ranging from 3.5% in Turkey to 10.5% in Bulgaria. Combining samples across European countries, 1 in 5 children reported internalizing problems and 1 in 12 children externalizing problems. The net completion rates of 4.1–74.3% preclude conclusions about national differences in prevalence rates.