Mycoplasma hominis and Ureaplasma urealyticum infections after knee arthroplasty: A case report.

RATIONALE: Artificial joint infection caused by Mycoplasma hominis and Ureaplasma urealyticum is rare and has not been reported. PATIENTS CONCERNS: A 59-year-old man underwent left total knee arthroplasty for 1 year of pain in the left knee joint. The indwelling urinary catheter was removed after 48 hour of the surgery. On day 8 after the surgery, the patient had fever, increased skin temperature, swelling and redness around the surgical site, and floating patella test (+). According to experience, Vancomycin, Ciprofloxacin and Linezolid were administrated. Evident decrease in C-reactive protein was observed after Linezolid administration, while there was no significant improvement in clinical symptoms. Microbiome sequencing was performed, resulting in diagnosis of positive M hominis and U urealyticum. The patient was then treated with Doxycycline in the following 3 months. During the 11-month outpatient follow-up, there was no evidence of recurrence of infection. DIAGNOSIS: Microbiome sequencing was performed, resulting in diagnosis of positive M hominis and Ureaplasma urealyticum. INTERVENTIONS: The patient recovered following with Doxycycline in the following 3 months. OUTCOMES: During the 11-month outpatient follow-up, there was no evidence of recurrence of infection. LESSONS: M hominis and U urealyticum are common pathogens of the urinary system infections but they are rare in osteoarticular infections. In cases of fever, swelling and heat pain around the surgical site, joint fluid, negative blood culture and being irresponsive to anti-bacterial agents against the cell wall, special bacteria-related infection should be highly suspected.

Association between potentially inappropriate medication and adverse drug reactions in hospitalized elderly patients.

WHAT IS KNOWN AND OBJECTIVE: The Beers, European Union (EU) and Screening Tool of Older Persons' potentially inappropriate Prescription (STOPP) criteria were developed to improve the safe use of medicines in the elderly. However, the predictive validity of existing criteria to detect adverse drug reactions (ADRs) remains unexplored. The objective of the current study was to determine whether the 2019 Beers, 2015 STOPP or 2015 EU potentially inappropriate medicine (PIM) criteria were associated with ADRs. METHODS: A retrospective, cross-sectional investigation was conducted among older persons (≥60 years of age) admitted to a tertiary hospital in China between April 2019 and December 2019. PIMs were identified as per the Beers, EU and STOPP criteria definitions. ADRs were retrospectively evaluated by two clinical pharmacists using the Naranjo algorithm. Multivariate logistic regression was used to evaluate the factors associated with ADRs in the hospitalized patients. RESULTS AND DISCUSSION: The study participants included 560 hospitalized patients (mean age 72.05 ± 8.15). The prevalence of patients receiving at least one PIM was 52.1%, 37.0% and 42.9% according to the Beers, EU and STOPP criteria, respectively. Univariate analysis showed that ADRs were associated with PIMs listed in the Beers criteria (OR: 2.093, 95% CI: 1.028-4.263, 0.042), but not with the STOPP-listed (OR: 0.536, 95% CI: 0.255-1.123, 0.098) and EU-listed PIMs (OR: 0.258, 95% CI: 0.118-0.563, 0.001). WHAT IS NEW AND CONCLUSION: In contrast to the STOPP and EU criteria on PIMs, the Beers criteria were significantly associated with avoidable ADRs in hospitalized older persons.

[Expressions of HSP110 family members in the testes and epididymis of mice at different stages of development and their regulation by hormones].

OBJECTIVE: To study the expressions of the members of HSP110 family in the testis and epididymis of mice at different stages of development and whether they are regulated by hormones. METHODS: The testicular and epididymis tissues of mice at different ages (14, 21, 28, 35, 42, 49, 70, and 90 days after birth, 3 mice at each age) were collected for RT-PCR detection of the expression levels of HSP110 family members. Forty-eight mice were randomized into 3 groups for sham operation, castration, or castration with testosterone injections every other day (starting at 7 days after castration), and at 1, 3, 5, and 7 days after first testosterone injection, the expressions of HSP110 family in the epididymis were detected using RT-PCR. RESULTS: The mRNA expression levels of HSP110 family members underwent obvious variations with the development of the mice: HSPA4, HSPA4l and HSPH1 expressions in the testicles of the mice first increased and then decreased, and gradually became stable; they also exhibited similar temporal patterns of changes in the epididymis. In the castrated mice, the mRNA expressions of HSPA4 and HSPA4l in the epididymis decreased significantly with the reduction of serum hormone levels (P < 0.05), and became normal after the supplementation of exogenous hormone. CONCLUSIONS: The expression levels of HSP110 family are affected by developmental regulation, and the expressions of HSPA4 and HSPA4l are under the regulation by hormones.

Expression and function of HSP110 family in mouse testis after vasectomy.

HSP110 functions to protect cells, tissues, and organs from noxious conditions. Vasectomy induces apoptosis in the testis; however, little is known about the reason leading to this outcome. The aim of the present study was to evaluate the expression and function of HSP110 in mouse testis after vasectomy. Following bilateral vasectomy, we used fluorescent Terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) to detect apoptosis, Western blotting and immunohistochemistry to examine HSP110 expression and localization. Serum antisperm antibody (AsAb) and testosterone were measured by Enzyme-linked immunosorbent assay (ELISA) and radioimmunoassay, respectively. Expression of endoplasmic reticulum stress (ERS) sensors and downstream signaling components was measured by Reverse Transcription-Polymerase Chain Reaction (RT-PCR), and the phosphorylation of eIF2α and JNK was detected by Western blotting. Vasectomy induced morphologic changes, increased apoptosis in the testis, increased serum AsAb, and decreased testosterone levels. After vasectomy, ORP150 mRNA level was increased first and then decreased, Bcl-2 was decreased, and the expression of HSPA4l, GRP78, GADD153, PERK, ATF6, IRE-1, XBP-1s, Bax, Bak, and caspases and the phosphorylation of eIF2α and JNK were increased. We present that an ER stress-mediated pathway is activated and involved in apoptosis in the testis after vasectomy. HSPA4l and ORP150 may play important roles in maintaining the normal structure and function of testis.

Characterisation of Lyzls in mice and antibacterial properties of human LYZL6.

C-type lysozyme genes (Lyzls) belong to the class of lysozymes and are highly expressed in the testis and epididymis. The members Lyzl4 and Spaca3 have been reported to play a role in sperm-egg binding and fertilisation in mice. However, the function of the remaining two mouse c-type lysozyme genes, Lyzl1 and Lyzl6, is still not clear. In the present study, we analysed the tissue expression and androgen-dependent expression of mouse c-type lysozyme genes and the possible contribution of human recombinant LYZL6 (rLYZL6) to immunity. The expression of Lyzls was detected by RT-PCR, Western blots, immunohistochemistry and immunofluorescence. The bacteriolytic activity of rLYZL6 was analysed by a colony-forming assay. In mice, the expression of Lyzl genes was mainly in the testis and epididymis in a developmentally regulated manner and androgen- or testicular factor-regulated manner. Immunodetection revealed the presence of LYZL6 protein in primary spermatocytes and round spermatids of the testis and on the post-acrosomal area and midpiece of mature epididymal spermatozoa. The rLYZL6 protein exhibited antibacterial activity. From the results, Lyzls may play a role in mitochondrial function of spermatozoa and LYZL6 may contribute to the innate immunity of the male genital tract.

[Expression of heat shock protein 90ß and its regulation in the reproductive system of male mice].

OBJECTIVE: To study the expression and regulation of heat shock protein 90ß (HSP90ß) in the testis, epididymis and sperms of mice. METHODS: The localization and expression of HSP90ß mRNA and protein were investigated in the testis, epididymis and sperms of mice, and the regulation of HSP90ß in the male reproductive system was explored. RESULTS: HSP90ß was expressed at a higher level in the epididymis than in the testis. In the sperms of the mice, HSP90ß was localized in the acrosome area. The expression of HSP90ß in mouse epididymis decreased after castration and recovered the normal level after testosterone treatment. HSP90ß expression in the testis and epididymis also underwent changes during the postnatal development of the mice. CONCLUSION: HSP90ß may play an important role in spermiogenesis and fertilization, and its expression pattern in the epididymis after castration and during the postnatal development suggests its regulation by hormones and development.